Honeycomb type denitration catalyst module

Abstract

The utility model discloses a honeycomb type denitration catalyst module and belongs to the technical field of SCR (Selective Catalytic Reduction) denitration catalysts. According to the technical scheme, the device comprises an outer frame, an inner supporting structure and a catalyst unit wall arranged in the outer frame; the outer frame comprises a bottom plate, a top plate and side plates which are assembled to form a square shell; the internal supporting structure comprises a plurality of oblique-angle stand columns and right-angle stand columns, and the internal supporting structure is connected with the external frame through fasteners; the catalyst unit wall comprises a plurality of catalyst unit components, the plurality of catalyst unit components form a U-shaped structure, and the catalyst unit wall is formed by combining a plurality of U-shaped structures; the catalyst unit assembly is of a sheet structure formed by combining a plurality of layers of honeycomb type catalyst units. According to the catalyst unit wall, the angles of different catalyst unit assemblies can be adjusted, and the lengths of the catalyst units in the catalyst unit assemblies can adjust a flue gas flow field, so that flue gas can pass through catalyst pore channels in a reactor in a balanced manner, and the denitration efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of SCR denitration catalysts, and particularly relates to a honeycomb denitration catalyst module. Background Art

[0002] Under the situation that ultra-low nitrogen oxide emissions are generally implemented in coal-fired power plants, the denitrification catalyst module, as the core component of flue gas denitrification technology, has a direct impact on the efficiency and reliability of flue gas denitrification. Due to space limitations, domestic large-scale gas flue gas units have high requirements for denitrification reactors, such as small size, large volume of catalyst, stable and reliable performance, and small resistance drop. During the stable operation stage of the gas turbine, the nitrogen oxides in the flue gas are mainly NO, containing a small amount of NO2. However, during the start-up and shutdown stages, NO2 will account for the total NO X When the molar ratio is higher than 50%, "yellow smoke" will appear in the chimney, causing emissions to exceed the standard. This is mainly because the unreasonable design and distribution of the catalyst module results in low denitrification efficiency and the flue gas cannot circulate normally. Utility Model Content

[0003] The utility model provides a honeycomb denitration catalyst module, wherein the catalyst unit wall can adjust the angles of different catalyst unit assemblies and the lengths of catalyst units within the catalyst unit assemblies to adjust the flue gas flow field in the denitration reactor, thereby enabling the flue gas to pass through the catalyst pores in the reactor in a balanced manner and increasing the denitration efficiency.

[0004] The technical solution of the utility model is:

[0005] The honeycomb denitrification catalyst module includes an external frame, an internal support structure and a catalyst unit wall arranged in the external frame; the external frame includes a bottom plate, a top plate and side plates, which form a square shell after assembly; the internal support structure includes a plurality of oblique-angle columns and right-angle columns, and the internal support structure is connected to the external frame by fasteners; the catalyst unit wall includes a catalyst unit assembly, and the plurality of catalyst unit assemblies form a U-shaped structure, and the catalyst unit wall is composed of a plurality of U-shaped structures; the catalyst unit assembly is a sheet structure composed of a plurality of layers of honeycomb catalyst units.

[0006] Preferably, the bottom plate, top plate and side plates are bolted together using steel structures, and the internal supports are made of sheet metal cross-sections or pipes.

[0007] Preferably, the catalyst unit assembly is made of corrugated channel steel as an outer frame, and each layer of catalyst units is fixed in the outer frame using I-shaped partitions.

[0008] Preferably, a plurality of oblique-angle columns and right-angle columns are arranged on the outside of the connection between two adjacent catalyst assemblies and at the connection between the catalyst assembly and the side plate.

[0009] Preferably, the U-shaped structure is formed by catalyst unit assembly one, catalyst unit assembly two and catalyst assembly unit three. The angle between catalyst unit assembly two and catalyst unit assembly one is 20°-120°. The angle is designed according to the conditions of each project. The change in angle can change the pressure drop, volume and removal efficiency.

[0010] Preferably, the catalyst unit assembly one and the catalyst unit assembly three are arranged vertically.

[0011] Preferably, the length ratio of catalyst unit assembly 1, catalyst unit assembly 2 and catalyst unit assembly 3 is (20-25): (8-11): (8-10).

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The catalyst unit wall of the utility model can adjust the flue gas flow field in the denitration reactor according to the U-shaped edge angle and the length of the catalyst unit in the catalyst unit assembly, so as to achieve balanced passage of the flue gas through the catalyst pores in the reactor and increase the denitration efficiency.

[0014] 2. Inside the denitrification reactor, multiple honeycomb SCR catalyst module boxes are installed according to actual needs, so that the flue gas can pass through the honeycomb catalyst unit channels on the catalyst unit wall, thereby achieving the purpose of denitrification and eliminating "yellow smoke".

[0015] 3. The U-shaped structure can optimize the flue gas flow field by adjusting the length of the catalyst unit assembly, so that the flue gas passes through the catalyst unit more evenly and improves the removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0017] Figure 2 It is the main view of the present utility model.

[0018] Figure 3 This utility model Figure 2 Cross-sectional view of the AA portion.

[0019] Figure 4 It is a structural schematic diagram of the catalyst unit wall of the utility model.

[0020] Figure 5 This utility model Figure 4 Magnified view of area B.

[0021] Figure 6 It is a structural schematic diagram of the catalyst unit assembly of the utility model.

[0022] In the figure, 1. external frame; 101. bottom plate; 102. top plate; 103. side plate; 2. internal supporting structure; 201. angled column; 202. right-angled column; 3. catalyst unit wall; 4. catalyst unit assembly; 401. catalyst unit assembly one; 402. catalyst unit assembly two; 403. catalyst unit assembly three; 501. honeycomb catalyst unit; 502. external frame; 503. I-shaped partition. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1-6 As shown, this embodiment provides a honeycomb denitration catalyst module, including an external frame 1, an internal support structure 2, and a catalyst unit wall 3 arranged in the external frame 1; the external frame 1 includes a bottom plate 101, a top plate 102 and a side plate 103, and the bottom plate 101, the top plate 102 and the side plate 103 are assembled to form a square shell, and the square shell is a front-to-back through structure, and the bottom plate 101, the top plate 102 and the side plate 103 are bolted with a steel structure; the internal support structure 2 includes a plurality of oblique angle columns 201 and right-angle columns 202, which are arranged between the bottom plate 101 and the top plate 102, and the oblique angle columns 201 and the right-angle columns 202 are made of sheet metal cross-section profiles or pipes, and a plurality of oblique angle columns 201 and right-angle columns 202 are arranged between two adjacent catalyst unit assemblies 4 The outside of the connection and the connection between the catalyst unit assembly 4 and the side plate 103 prevent the smoke from leaking from the gap between the catalyst unit assemblies 4 or the gap between the catalyst unit assembly 4 and the side plate 103; at the same time, it can maintain the angle between different catalyst unit assemblies 4, thereby adjusting the direction of the smoke flow, and the internal support structure 2 is connected to the external frame 1 by fasteners; the catalyst unit wall 3 includes a catalyst unit assembly 4, and multiple catalyst unit assemblies 4 form a U-shaped structure, and the catalyst unit wall 3 is composed of multiple U-shaped structures; the catalyst unit assembly 4 is a sheet structure composed of multiple layers of honeycomb catalyst units 501, and the catalyst unit assembly 4 uses corrugated channel steel as the outer frame 502, and each layer of honeycomb catalyst unit is fixed in the outer frame 502 with an I-shaped partition 503.

[0026] The U-shaped structure is formed by catalyst unit assembly 1 401, catalyst unit assembly 2 402 and catalyst unit assembly 3 403, and the angle between catalyst unit assembly 2 402 and catalyst unit assembly 1 401 is 120°; catalyst unit assembly 1 401 and catalyst unit assembly 3 403 are arranged vertically; the length ratio of catalyst unit assembly 1 401, catalyst unit assembly 2 402 and catalyst unit assembly 3 403 is 24:11:10.

[0027] The right-angled columns primarily provide vertical support, ensuring the stability of the entire internal support structure 2. They vertically connect the bottom plate 101 and the top plate 102, forming a solid framework foundation that effectively resists external pressure and the weight of the internal catalyst cell walls 3. The angled columns not only provide additional support but also enhance the rigidity and stability of the overall structure through their tilted angle, preventing deformation caused by external forces (such as flue gas impact).

[0028] In the presence of a catalyst, the length and proportion of the U-shaped structure of the catalyst unit are adjusted to adjust the flue gas flow direction in the denitrification reactor. By spraying a reducing agent (usually ammonia) into the flue gas, NOx reacts chemically with the reducing agent at a lower temperature to generate harmless nitrogen and water, thereby achieving the denitrification effect.

[0029] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and substance of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall fall within the scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. Honeycomb denitrification catalyst module, characterized in that: It comprises an external frame (1), an internal support structure (2), and a catalyst unit wall (3) arranged in the external frame (1); The outer frame (1) comprises a bottom plate (101), a top plate (102) and side plates (103), which are assembled to form a square housing; An internal support structure (2) comprising a plurality of oblique-angle columns (201) and right-angle columns (202), wherein the internal support structure (2) is connected to the external frame (1) via fasteners; The catalyst unit wall (3) includes a catalyst unit assembly (4), a plurality of catalyst unit assemblies (4) form a U-shaped structure, and the catalyst unit wall (3) is composed of a plurality of U-shaped structures; The catalyst unit assembly (4) is a sheet-like structure composed of multiple layers of honeycomb catalyst units (501).

2. The honeycomb denitration catalyst module according to claim 1, characterized in that: The bottom plate (101), the top plate (102) and the side plates (103) are bolted together using steel structures, and the internal supports are made of sheet metal cross-section profiles or pipes.

3. The honeycomb denitration catalyst module according to claim 1, characterized in that: The catalyst unit assembly (4) is made of corrugated channel steel as an outer frame (502), and each layer of honeycomb catalyst unit (501) is fixed in the outer frame (502) by an I-shaped partition (503).

4. The honeycomb denitration catalyst module according to claim 1, characterized in that: A plurality of oblique-angle columns (201) and right-angle columns (202) are arranged on the outside of the connection between two adjacent catalyst unit assemblies (4) and at the connection between the catalyst unit assembly (4) and the side plate (103).

5. The honeycomb denitration catalyst module according to claim 1, characterized in that: The U-shaped structure is formed by catalyst unit assembly 1 (401), catalyst unit assembly 2 (402) and catalyst unit assembly 3 (403), and the angle between catalyst unit assembly 2 (402) and catalyst unit assembly 1 (401) is 20°-120°.

6. The honeycomb denitration catalyst module according to claim 5, characterized in that: Catalyst unit assembly one (401) and catalyst unit assembly three (403) are arranged vertically.

7. The honeycomb denitration catalyst module according to claim 5, characterized in that: The length ratio of the catalyst unit assembly 1 (401), the catalyst unit assembly 2 (402) and the catalyst unit assembly 3 (403) is (20-25): (8-11): (8-10).

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