Sawtooth type denitration catalyst module and denitration reactor

Abstract

The invention relates to a sawtooth-type denitration catalyst module and a denitration reactor. 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 in 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] The invention relates to the technical field of gas denitration catalyst arrangement, and in particular to a sawtooth denitration catalyst module and a denitration reactor. Background Art

[0002] Selective Catalytic Reduction (SCR) refers to the use of a reducing agent (such as NH3, liquid ammonia, urea) to "selectively" reduce NO in flue gas under the action of a catalyst. x React and generate non-toxic and non-polluting N2 and H2O. With the gradual completion of ultra-low nitrogen oxide emissions from coal-fired units, under the premise of implementing the same emission standards, the NO per kilowatt-hour of gas-fired units x The emission of gas-fired units is about 1.45 times that of coal-fired units, so the NO x The demand for ultra-low emission technology is becoming more and more urgent. Since the SCR flue of some gas turbine power plants is arranged horizontally and the reserved SCR space is limited, the bottom catalyst module has a high load-bearing capacity and the gas turbine system resistance requirements are very strict. Therefore, it is necessary to propose a new catalyst module with low resistance and high load-bearing characteristics suitable for SCR horizontal flue. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a sawtooth denitration catalyst module and a denitration reactor suitable for SCR horizontal flue with low resistance and high load-bearing characteristics.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows: Based on one aspect of the present invention, a serrated denitrification catalyst module is provided, comprising a module box body which passes through a flue and is adapted to the width of the flue, catalyst units and load-bearing plates which are arranged alternately along the width of the flue in the module box body, any of the catalyst units being connected to the adjacent load-bearing plates and the surface angle δ between the adjacent catalyst units and the load-bearing plates being greater than 0° and less than 90°, and at the same time, the number N of the catalyst units, the width A of the box body, and the length B of the catalyst units satisfy N≥A / B.

[0005] In one embodiment, the load-bearing plate is arranged along a vertical plane perpendicular to the module box.

[0006] In one embodiment, the catalyst units arranged at intervals are arranged tilted in the same direction in the module box.

[0007] In one embodiment, the inter-plane angle δ is 60°≥δ≥10°.

[0008] In one embodiment, the load-bearing plate is a steel plate with a thickness of 1-10 mm.

[0009] In one embodiment, any one of the catalyst units is sealedly connected to the adjacent load-bearing plate and the adjacent module box.

[0010] In one embodiment, the catalyst unit body includes a plurality of catalyst units distributed in a matrix, and the plurality of catalyst units in the catalyst unit body are sealed and bonded with a high-temperature bonding material.

[0011] In one embodiment, the catalyst unit body includes n catalyst units distributed in a matrix, and the number n of the catalyst units satisfies: n≤B / 150.

[0012] In one embodiment, the catalyst unit is a honeycomb catalyst, and the hole type of the honeycomb catalyst is any one of 40 holes, 45 holes, 50 holes, 55 holes, 70 holes, 80 holes, 90 holes, 108 holes, and 120 holes.

[0013] According to another aspect of the present invention, a denitration reactor is provided, wherein the denitration reactor comprises a sawtooth denitration catalyst module as described in any one of the above items.

[0014] Compared with the prior art, the sawtooth denitration catalyst module and denitration reactor provided by the present invention have the following advantages: (1) Adopting independent module architecture, it is easy to disassemble, transport and install on site without the risk of wear and tear; (2) Effectively reduce the flow velocity of flue gas in the pores of the catalyst unit and increase the effective contact time between flue gas and catalyst; (3) Transition the catalyst from a straight-through “laminar flow” form to a “turbulent flow” form to enhance the gas dynamics reaction effect; (4) The pressure drop of the catalyst system is adjustable within a certain range. By adjusting the surface angle δ between the catalyst unit and the load-bearing plate and the length B of the catalyst unit, the lower the angle δ, the lower the channel flow rate and the lower the pressure drop; the shorter the length B of the catalyst unit, the lower the pressure drop; the pressure drop reduction is 50%-80% lower than that of the traditional straight-through module structure, which can effectively reduce the energy consumption of the gas unit and increase the active power of the unit; (5) The additional load-bearing plate greatly improves the load-bearing capacity of the catalyst module by 20-50%, and the load-bearing force distribution is more uniform, which can be directly used for the multi-module layout of the horizontal flue.

[0015] Other advantages of the present invention will be described in detail in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] In the attached picture: Figure 1 This is a schematic structural diagram of a first embodiment of a sawtooth denitration catalyst module of the present invention, wherein arrow C indicates the direction of flue gas flow; Figure 2 for Figure 1 The three-dimensional structure diagram of the sawtooth denitration catalyst module shown; Figure 3 This is a schematic structural diagram of a second embodiment of a sawtooth denitration catalyst module of the present invention, wherein arrow C indicates the direction of flue gas flow; Figure 4 for Figure 3 The three-dimensional structure diagram of the sawtooth deNOx catalyst module is shown.

[0018] Explanation of reference numerals: 1 module box, 2 catalyst unit body, 3 load-bearing plate, 21 catalyst unit. DETAILED DESCRIPTION

[0019] To further explain the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings, in which the same reference numerals represent the same components.

[0020] Embodiment 1 like Figure 1 and Figure 2 As shown, the present embodiment provides a serrated denitration catalyst module, comprising a module box body 1 which passes through the flue and is adapted to the width of the flue, catalyst units 2 and load-bearing plates 3 which are arranged alternately along the width of the flue in the module box body 1, the plane where the load-bearing plates 3 are located is parallel to the central axis of the flue and is arranged perpendicular to the module box body 1 along a vertical plane, any catalyst unit body 2 is connected to an adjacent load-bearing plate 3 and the surface angle δ between adjacent catalyst unit bodies 2 and the load-bearing plates 3 is 60°≥δ≥10°, and at the same time, the number N of catalyst units 21, the width A of the box body 1, and the length B of the catalyst unit 21 satisfy N≥A / B.

[0021] In this embodiment, the catalyst units 2 arranged at intervals are arranged tilted in the same direction in the module box 1, and the bearing plate 3 is a steel plate with a thickness of 1-10 mm. Any catalyst unit 2 is sealed and connected with the adjacent bearing plate 3 and the adjacent module box 1 (the catalyst unit 2 located at the edge will be adjacent to the inner wall of the module box 1) using sealing angle steel. The plane angle δ between adjacent catalyst units 2 and load-bearing plates 3 is 60°≥δ≥10°. A catalyst unit 2 and an adjacent load-bearing plate 3 form a zigzag catalyst unit group. The catalyst units 2 and load-bearing plates 3 arranged alternately in the module box 1 together form a zigzag arrangement. The steel plate, i.e., the load-bearing plate 3, is arranged perpendicular to the module box 1 along a vertical plane to increase the load-bearing capacity of the catalyst module. The catalyst unit 2 is arranged at an angle, which can effectively increase the surface area of ​​the catalyst unit 2 and reduce the flow velocity in the pores of the catalyst unit 21, thereby reducing the resistance of the catalyst SCR system. The alternately arranged catalyst units 2 and load-bearing plates 3 together form a zigzag distributed catalyst unit group, which reduces the system resistance while increasing the load-bearing capacity of the catalyst module.

[0022] In this embodiment, the catalyst unit body 2 includes a plurality of catalyst units 21 distributed in a matrix, and the plurality of catalyst units 21 of the catalyst unit body 2 are sealed and bonded by a high-temperature bonding material. The catalyst unit body 2 includes n catalyst units 21 distributed in a matrix, and the number n of the catalyst units 21 satisfies: n≤B / 150. The catalyst unit 21 is a honeycomb catalyst, and the hole type of the honeycomb catalyst is any one of 45 holes, 50 holes, 55 holes, and 70 holes.

[0023] Based on the above embodiment 1, a denitration reactor including a sawtooth denitration catalyst module as described in the above embodiment 1 is also provided. In the denitration reactor, the number and size of the sawtooth denitration catalyst modules are determined according to the actual size of the reactor and the denitration performance. The denitration reactor including the sawtooth denitration catalyst module as described above changes the traditional straight-through module arrangement form, adopts an independent catalyst unit group module architecture, is easy 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 capacity of the catalyst module, the load-bearing capacity of the catalyst module is increased by 20-50%, the load-bearing force distribution is more uniform, and it can be directly used for the multi-module arrangement of the horizontal flue; the catalyst unit body is arranged obliquely, which can effectively increase the surface area of ​​the catalyst unit body, effectively reduce the flow velocity of the flue gas in the catalyst unit pore, increase the effective contact time between the flue gas and the catalyst, and transition the catalyst from the "laminar" form of the straight-through arrangement to the "turbulent" form, strengthen the gas dynamic reaction effect, and reduce the pressure drop of the catalyst system by 50%-80%, effectively reduce the energy consumption of the gas unit, and increase the active power of the unit.

[0024] Embodiment 2 like Figure 3 and Figure 4 As shown, the present embodiment provides a serrated denitration catalyst module, comprising a module box body 1 which passes through the flue and is adapted to the width of the flue, catalyst units 2 and load-bearing plates 3 which are arranged alternately along the width of the flue in the module box body 1, the plane where the load-bearing plates 3 are located is parallel to the central axis of the flue and is arranged perpendicular to the module box body 1 along a vertical plane, any catalyst unit body 2 is connected to an adjacent load-bearing plate 3 and the surface angle δ between adjacent catalyst unit bodies 2 and the load-bearing plates 3 is 60°≥δ≥10°, and at the same time, the number N of catalyst units 21, the width A of the box body 1, and the length B of the catalyst unit 21 satisfy N≥A / B.

[0025] In this embodiment, the catalyst units 2 arranged at intervals are arranged symmetrically around the center line of the module box 1, and the load-bearing plate 3 is a steel plate with a thickness of 1-10 mm. Any catalyst unit 2 and the adjacent load-bearing plate 3 and the adjacent module box 1 (the catalyst unit 2 located at the edge will be adjacent to the inner wall of the module box 1) are sealed and connected by sealing angle steel. The surface angle δ between the adjacent catalyst unit 2 and the load-bearing plate 3 is 60°≥δ≥10°. A catalyst unit 2 and an adjacent load-bearing plate 3 form a serrated catalyst unit group. The catalyst units 2 and the load-bearing plates 3 arranged one by one in the module box 1 together form a serrated arrangement. The steel plate, that is, the load-bearing plate 3, is arranged perpendicular to the module box 1 along the vertical plane to increase the load-bearing capacity of the catalyst module. The catalyst unit 2 is arranged obliquely, which can effectively increase the surface area of ​​the catalyst unit 2 and reduce the flow rate in the pores of the catalyst unit 21, thereby reducing the resistance of the catalyst SCR system.

[0026] In this embodiment, the catalyst unit body 2 includes a plurality of catalyst units 21 distributed in a matrix, and the plurality of catalyst units 21 of the catalyst unit body 2 are sealed and bonded by a high-temperature bonding material. The catalyst unit body 2 includes n catalyst units 21 distributed in a matrix, and the number n of the catalyst units 21 satisfies: n≤B / 150. The catalyst unit 21 is a honeycomb catalyst, and the hole type of the honeycomb catalyst is any one of 45 holes, 50 holes, 55 holes, and 70 holes.

[0027] Based on the above embodiment 2, a denitration reactor including a sawtooth denitration catalyst module as described in the above embodiment 2 is also provided. In the denitration reactor, the number and size of the sawtooth denitration catalyst modules are determined according to the actual size of the reactor and the denitration performance. The denitration reactor including the sawtooth denitration catalyst module as described above changes the traditional straight-through module arrangement form, adopts an independent catalyst unit group module architecture, is easy 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 capacity of the catalyst module, the load-bearing capacity of the catalyst module is increased by 20-50%, the load-bearing force distribution is more uniform, and it can be directly used for the multi-module arrangement of the horizontal flue; the catalyst unit body is arranged obliquely, which can effectively increase the surface area of ​​the catalyst unit body, effectively reduce the flow velocity of the flue gas in the catalyst unit pore, increase the effective contact time between the flue gas and the catalyst, and transition the catalyst from the "laminar" form of the straight-through arrangement to the "turbulent" form, strengthen the gas dynamic reaction effect, and reduce the pressure drop of the catalyst system by 50%-80%, effectively reduce the energy consumption of the gas unit, and increase the active power of the unit.

[0028] The above description is only a specific implementation of the present invention. It should be pointed out that any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention.

Claims

1. A sawtooth denitration catalyst module, characterized in that: The invention comprises a module box (1) which passes through a flue and is adapted to the width of the flue, catalyst units (2) and load-bearing plates (3) which are arranged alternately along the width of the flue in the module box (1), wherein any catalyst unit (2) is connected to an adjacent load-bearing plate (3), and the plane angle δ between the adjacent catalyst units (2) and the load-bearing plate (3) is greater than 0° and less than 90°, and the number N of the catalyst units (21), the width A of the box (1), and the length B of the catalyst units (21) satisfy N≥A / B.

2. The sawtooth denitration catalyst module according to claim 1, characterized in that: The load-bearing plate (3) is arranged along a vertical plane perpendicular to the module box (1).

3. The sawtooth denitration catalyst module according to claim 1 or 2, characterized in that: The catalyst units (2) arranged at intervals are arranged in the module box (1) at an angle in the same direction.

4. The sawtooth denitration catalyst module according to claim 1 or 2, characterized in that: The inter-plane angle δ is 60°≥δ≥10°.

5. The sawtooth denitration catalyst module according to claim 1 or 2, characterized in that: The load-bearing plate (3) is a steel plate with a thickness of 1-10 mm.

6. The sawtooth denitration catalyst module according to claim 1 or 2, characterized in that: Any one of the catalyst units (2) is sealedly connected to the adjacent load-bearing plate (3) and the adjacent module box (1).

7. The sawtooth denitration catalyst module according to claim 1 or 2, characterized in that: The catalyst unit body (2) comprises a plurality of catalyst units (21) distributed in a matrix, and the plurality of catalyst units (21) of the catalyst unit body (2) are sealed and bonded using a high-temperature bonding material.

8. The sawtooth denitration catalyst module according to claim 7, characterized in that: The catalyst unit body (2) comprises n catalyst units (21) distributed in a matrix, and the number n of the catalyst units (21) satisfies: n≤B / 150.

9. The sawtooth denitration catalyst module according to claim 7, characterized in that: The catalyst unit (21) is a honeycomb catalyst, and the hole type of the honeycomb catalyst is any one of 40 holes, 45 holes, 50 holes, 55 holes, 70 holes, 80 holes, 90 holes, 108 holes, and 120 holes.

10. A denitration reactor, characterized in that: The denitration reactor comprises a sawtooth denitration catalyst module as described in any one of claims 1-9.

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