CN210097395U - Denitration catalyst assembly - Google Patents

Abstract

The application discloses denitration catalyst subassembly. This denitration catalyst subassembly includes outer filter screen, inlayer filter screen and a plurality of catalyst granule, outer filter screen with the inlayer filter screen is the tubular structure, outer filter screen cover is established the outside of inlayer filter screen, the inside of inlayer filter screen is formed with the flue gas and carries the chamber, outer filter screen's inner wall with be formed with catalyst holding chamber between the outer wall of inlayer filter screen, it is a plurality of the catalyst granule is filled catalyst holding intracavity, set up on the catalyst granule and run through at least one thru hole of catalyst granule body. The application solves the technical problems that the specific surface area of the catalyst adopted by the SCR denitration technology is limited seriously and the flue gas denitration effect is not good.

Description

Denitration catalyst assembly

Technical Field

The application relates to the technical field of flue gas purification, particularly, relate to a denitration catalyst subassembly.

Background

At the present stage, most of catalysts adopted by SCR denitration technology (selective catalytic reduction technology) adopt honeycomb type or plate type structures, the problems of long construction period, high construction difficulty, high investment cost and the like of steel structures required by the structure are solved, meanwhile, the mechanical strength is not good enough, the specific surface area is limited, and the service life and the use effect are greatly influenced.

Aiming at the problems that the specific surface area of a catalyst adopted by an SCR denitration technology in the related technology is seriously limited and the flue gas denitration effect is poor, an effective solution is not provided at present.

SUMMERY OF THE UTILITY MODEL

The main aim at of this application provides a denitration catalyst module to solve the limited problem serious, the flue gas denitration effect is not good of catalyst specific surface area that SCR denitration technique adopted.

In order to achieve the above object, the present application provides a denitration catalyst assembly.

A denitration catalyst assembly according to the present application, comprising: outer filter screen, inlayer filter screen and a plurality of catalyst granule, outer filter screen with the inlayer filter screen is the tubular structure, outer filter screen cover is established the outside of inlayer filter screen, the inside of inlayer filter screen is formed with the flue gas and carries the chamber, outer filter screen's inner wall with be formed with catalyst holding chamber between the outer wall of inlayer filter screen, it is a plurality of the catalyst granule is filled the catalyst holding intracavity, seted up on the catalyst granule and run through at least one thru hole of catalyst granule body.

Furthermore, a reinforcing rib assembly for reinforcing the connection relationship between the outer filter screen and the inner filter screen is arranged between the inner wall of the outer filter screen and the outer wall of the inner filter screen.

Further, the strengthening rib subassembly includes first strengthening rib and second strengthening rib, first strengthening rib with the second strengthening rib is the loop configuration, first strengthening rib is located the upper portion in flue gas transport chamber, the second strengthening rib is located the lower part in flue gas transport chamber, the outer fringe of first strengthening rib with the outer fringe of second strengthening rib all with the interior wall connection of outer filter screen, the inner edge of first strengthening rib with the inner edge of second strengthening rib all with the outer wall connection of inlayer filter screen.

Further, denitration catalyst subassembly still includes first flange subassembly and second flange subassembly, second flange subassembly fixed connection be in the bottom of outer filter screen with the bottom of inlayer filter screen, first flange subassembly fixed connection be in the top of outer filter screen with the top of inlayer filter screen, the exhanst gas outlet has been seted up on the first flange subassembly, the exhanst gas outlet with the flue gas is carried the chamber intercommunication.

Furthermore, the bottom of the first flange assembly is connected with the top of the outer layer filter screen and the top of the inner layer filter screen in a matched mode through a first buckling structure.

Further, first buckle structure is including setting up the first cyclic annular boss and the setting of first flange subassembly bottom are in outer filter screen top with the first draw-in groove at inlayer filter screen top, the top edge of outer filter screen with the top edge of inlayer filter screen all to catalyst holding chamber direction extends in order to form first draw-in groove, the outer fringe of first cyclic annular boss with first draw-in groove cooperation chucking.

Furthermore, the top of the second flange assembly is connected with the bottom of the outer layer filter screen and the bottom of the inner layer filter screen in a matched mode through a second buckling structure.

Further, second buckle structure is including setting up the annular boss of second at second flange subassembly top and setting are in outer filter screen bottom with the second draw-in groove of inlayer filter screen bottom, the bottom edge of outer filter screen with the bottom edge of inlayer filter screen all to catalyst holding chamber direction extends in order to form the second draw-in groove, the annular boss of second with second draw-in groove cooperation chucking.

Further, a plurality of the catalyst particles are spherical, clover-shaped, cylindrical and/or flaky.

Furthermore, the catalyst particles are of a sheet structure, and a plurality of through holes are uniformly distributed on the catalyst particles.

In the embodiment of the application, a catalyst containing cavity is formed between the inner wall of the outer filter screen and the outer wall of the inner filter screen, a plurality of catalyst particles are filled in the catalyst containing cavity, at least one through hole penetrating through the body of the catalyst particles is formed on the catalyst particles, so that the specific surface area of the catalyst particles is greatly increased, the catalyst particles can be in full contact with flue gas, the contact time of the catalyst particles and the flue gas is prolonged, the service life of the catalyst particles is prolonged, the reaction rate of the catalyst particles participating in the reaction is greatly improved, and good denitration effect on the flue gas is ensured, in addition, the outer filter screen and the inner filter screen can play a double filtering effect on the flue gas, the solid dust content in the flue gas is reduced, and the flue gas with higher cleanliness can be ensured to be discharged through the denitration catalyst assembly of the utility model, and can guarantee the smooth going on of denitration reaction, avoid excessive solid dust in the flue gas to influence going on smoothly of reaction.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

fig. 1 is a schematic structural view of a denitration catalyst module according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at position A;

FIG. 3 is a partial enlarged view of the position B in FIG. 1

Fig. 4 is a plan view of catalyst particles in a first embodiment of a denitration catalyst module according to the present invention;

fig. 5 is a front view of catalyst particles in a first embodiment of a denitration catalyst assembly of the present invention;

fig. 6 is a plan view of catalyst particles in a second embodiment of a denitration catalyst assembly of the present invention;

fig. 7 is a front view of catalyst particles in a second embodiment of a denitration catalyst assembly of the present invention;

fig. 8 is a plan view of catalyst particles in a third embodiment of a denitration catalyst module according to the present invention;

fig. 9 is a front view of catalyst particles in a third embodiment of a denitration catalyst assembly of the present invention;

fig. 10 is a plan view of catalyst particles in a fourth embodiment of a denitration catalyst assembly of the present invention;

fig. 11 is a front view of catalyst particles in a fourth embodiment of a denitration catalyst module according to the present invention.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not used to limit the indicated components, elements or elements to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two components, elements or groups. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Unless the directions are individually defined, all references to up and down directions in the present disclosure are to be interpreted as referring to up and down directions in fig. 1, which are shown in the present disclosure, and are herein incorporated by reference.

As shown in fig. 1, the application relates to a denitration catalyst assembly, this denitration catalyst assembly includes outer filter screen 1, inlayer filter screen 2 and a plurality of catalyst granule 8, outer filter screen 1 and inlayer filter screen 2 are the cylindric structure that sets up along vertical direction, outer filter screen 1 cover is established in the outside of inlayer filter screen 2, inlayer filter screen 2's inside is formed with flue gas transport chamber 3, be formed with catalyst holding chamber 101 between outer filter screen 1's the inner wall and inlayer filter screen 2's the outer wall, a plurality of catalyst granule 8 are filled in catalyst holding chamber 101, catalyst granule 8 is last to be seted up at least one thru hole 801 that runs through catalyst granule 8 body. The utility model discloses be formed with catalyst holding chamber 101 between outer filter screen 1's inner wall and inlayer filter screen 2's outer wall, it has a plurality of catalyst granule 8 to pack in catalyst holding chamber 101, set up at least one thru hole 801 that runs through catalyst granule 8 body on the catalyst granule 8, thereby greatly increased catalyst granule 8's specific surface area, can make catalyst granule 8 and flue gas carry out abundant contact, the contact time of catalyst granule 8 with the flue gas has been prolonged, the temperature range that will postpone the denitration enlarges to 150 ℃ -400 ℃, the reaction rate that catalyst granule 8 participated in the reaction has been improved greatly when improving catalyst granule 8 life, guarantee to have good denitration effect to the flue gas. In addition, outer filter screen 1 and inlayer filter screen 2 can reduce the solid dust content in the flue gas to playing the dual filter effect to the flue gas, not only can guarantee to pass through the utility model discloses a higher flue gas of denitration catalyst subassembly discharge cleanliness factor can guarantee going on smoothly of denitration reaction moreover, avoids going on smoothly of excessive solid dust influence reaction in the flue gas.

As shown in fig. 4-11, the plurality of catalyst particles 8 may be, but are not limited to, spherical, clover-shaped, cylindrical, and/or plate-shaped. When the catalyst particle 8 is a sheet-like structure, the number of the through holes 801 on the catalyst particle 8 is plural, and the plural through holes 801 are uniformly arranged on the catalyst particle 8 in an array form. The through holes 801 on the catalyst particles 8 are formed, so that the specific surface area is improved to a greater extent on the basis of ensuring the mechanical strength of the catalyst particles 8, the using amount of the catalyst can be reduced by 50-70% under the same working condition, the hollow structure of the catalyst particles 8 can be fully contacted with flue gas, and the contact time between the delay and the catalyst particles 8 is prolonged. The size of the catalyst particles 8 can be adjusted according to the process requirements and requirements, the equivalent diameter is conventionally designed to be 2-50 mm, and different specifications or multiple specifications can be selected for use under special conditions.

Further, the catalyst particles 8 fill the entire space of the catalyst accommodating chamber 101, thereby ensuring that the best denitration effect is achieved.

Specifically, the interval between outer filter screen 1 and inlayer filter screen 2 is 10 ~ 500mm, and the diameter of flue gas transport chamber 3 is 50 ~ 1500mm, and the length of outer filter screen 1 and inlayer filter screen 2 is 200 ~ 4000 mm.

Further, the outer filter screen 1 and the inner filter screen 2 can be made of, but not limited to, Q345 stainless steel material or 316L stainless steel material, the thickness of the outer filter screen 1 and the thickness of the inner filter screen 2 can be, but not limited to, 3-6 mm, and the aperture of the filter holes in the outer filter screen 1 and the aperture of the filter holes in the inner filter screen 2 are both smaller than the particle size of the catalyst particles 8.

As shown in fig. 1 to 3, a reinforcing rib assembly for reinforcing the connection relationship between the outer filter screen 1 and the inner filter screen 2 is arranged between the inner wall of the outer filter screen 1 and the outer wall of the inner filter screen 2, so as to ensure the stability of the connection between the outer filter screen 1 and the inner filter screen 2.

Further, as shown in fig. 1 to 3, the reinforcing rib assembly includes a first reinforcing rib 6 and a second reinforcing rib 7, both the first reinforcing rib 6 and the second reinforcing rib 7 are of a circular ring structure, the first reinforcing rib 6 is sleeved outside the inner layer filter screen 2, and the first reinforcing rib 6 is located at the upper part of the flue gas conveying cavity 3; the second reinforcing rib 7 is sleeved on the outer side of the inner layer filter screen 2, and the second reinforcing rib 7 is positioned at the lower part of the flue gas conveying cavity 3. The outer edge of the first reinforcing rib 6 and the outer edge of the second reinforcing rib 7 are both connected with the inner wall of the outer-layer filter screen 1, and the inner edge of the first reinforcing rib 6 and the inner edge of the second reinforcing rib 7 are both connected with the outer wall of the inner-layer filter screen 2.

As shown in fig. 1, the denitration catalyst assembly further comprises a first flange assembly 4 and a second flange assembly 5, the second flange assembly 5 is fixedly connected to the bottom of the outer filter screen 1 and the bottom of the inner filter screen 2, the first flange assembly 4 is fixedly connected to the top of the outer filter screen 1 and the top of the inner filter screen 2, a flue gas outlet 401 is formed in the first flange assembly 4, and the flue gas outlet 401 is communicated with the flue gas conveying cavity 3. The outer filter screen 1 and the inner filter screen 2 can be fixedly connected through the first flange assembly 4 and the second flange assembly 5, and can also be connected with external equipment through the first flange assembly 4 and the second flange assembly 5.

As shown in fig. 1 and 2, the bottom of the first flange assembly 4 is connected with the top of the outer filter screen 1 and the top of the inner filter screen 2 in a matching manner through a first snap structure.

Specifically, as shown in fig. 2, first buckle structure is including setting up the first cyclic annular boss 402 in first flange subassembly 4 bottom and setting up the first draw-in groove 9 at outer filter screen 1 top and inner filter screen 2 top, the top edge of outer filter screen 1 and the top edge of inner filter screen 2 all to catalyst holding chamber 101 direction is extended in order to form first draw-in groove 9, is provided with first protruding muscle in the outer fringe of first cyclic annular boss 402, in embedding first draw-in groove 9 through first protruding muscle to cooperate the chucking with first draw-in groove 9.

As shown in fig. 1 and 3, the top of the second flange assembly 5 is connected with the bottom of the outer filter screen 1 and the bottom of the inner filter screen 2 by a second snap structure.

Specifically, as shown in fig. 3, the second buckle structure includes a second annular boss 501 arranged at the top of the second flange assembly 5 and a second clamping groove 10 arranged at the bottom of the outer filter screen 1 and the bottom of the inner filter screen 2, the bottom edge of the outer filter screen 1 and the bottom edge of the inner filter screen 2 both extend towards the catalyst accommodating cavity 101 to form the second clamping groove 10, a second convex rib is arranged on the outer edge of the second annular boss 501, and is embedded into the second clamping groove 10 through the second convex rib, and is clamped in cooperation with the second clamping groove 10.

The working principle of the component is as follows: the utility model is suitable for a flue gas (NOx concentration 200 ~ 4000mg Nm3) of various operating modes carry out denitration treatment. The flue gas to be denitrated enters the catalyst containing cavity 101 after being filtered by the outer filter screen 1, the flue gas in the catalyst containing cavity 101 is in full contact with the catalyst particles 8 and is subjected to denitration reaction, different turbulent flow states are formed when the flue gas passes through the through holes 801 between the catalyst particles 8 and on the catalyst particles 8, the specific surface area of the catalyst particles 8 is large, the flow velocity of the flue gas passing through the catalyst containing cavity 101 is low (0.025-0.25 m/s), the contact time of the flue gas and the catalyst particles 8 is prolonged, the denitration efficiency of the flue gas is improved, and the denitration effect of the whole set of denitration assembly meets the national environment emission requirement. The flue gas enters the flue gas conveying cavity 3 after passing through the catalyst accommodating cavity 101 and being filtered by the inner layer filter screen 2, and is discharged outwards through the flue gas outlet 401 on the first flange component 4.

From the above description, it can be seen that the present invention achieves the following technical effects:

a catalyst containing cavity 101 is formed between the inner wall of the outer filter screen 1 and the outer wall of the inner filter screen 2, a plurality of catalyst particles 8 are filled in the catalyst containing cavity 101, at least one through hole 801 penetrating through the body of the catalyst particle 8 is formed on the catalyst particle 8, thereby greatly increasing the specific surface area of the catalyst particle 8, enabling the catalyst particle 8 to be in full contact with the flue gas, prolonging the contact time of the catalyst particle 8 and the flue gas, greatly improving the reaction rate of the catalyst particle 8 participating in the reaction while prolonging the service life of the catalyst particle 8, ensuring good denitration effect on the flue gas, in addition, the outer filter screen 1 and the inner filter screen 2 can play a double filtering effect on the flue gas, reducing the solid dust content in the flue gas, and ensuring that the flue gas with higher cleanliness is discharged by the denitration catalyst assembly of the utility model, and can guarantee the smooth going on of denitration reaction, avoid excessive solid dust in the flue gas to influence going on smoothly of reaction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A denitration catalyst assembly, comprising: outer filter screen (1), inlayer filter screen (2) and a plurality of catalyst granule (8), outer filter screen (1) with inlayer filter screen (2) are the tubular structure, outer filter screen (1) cover is established the outside of inlayer filter screen (2), the inside of inlayer filter screen (2) is formed with flue gas transport chamber (3), the inner wall of outer filter screen (1) with be formed with catalyst holding chamber (101), a plurality of between the outer wall of inlayer filter screen (2) catalyst granule (8) are filled in catalyst holding chamber (101), seted up on catalyst granule (8) and run through at least one thru hole (801) of catalyst granule (8) body.

2. The denitration catalyst assembly of claim 1, wherein a reinforcing rib assembly for reinforcing the connection relationship between the outer filter screen (1) and the inner filter screen (2) is arranged between the inner wall of the outer filter screen (1) and the outer wall of the inner filter screen (2).

3. The denitration catalyst assembly of claim 2, wherein the reinforcing rib assembly comprises a first reinforcing rib (6) and a second reinforcing rib (7), the first reinforcing rib (6) and the second reinforcing rib (7) are both of an annular structure, the first reinforcing rib (6) is located on the upper portion of the flue gas conveying cavity (3), the second reinforcing rib (7) is located on the lower portion of the flue gas conveying cavity (3), the outer edge of the first reinforcing rib (6) and the outer edge of the second reinforcing rib (7) are both connected with the inner wall of the outer filter screen (1), and the inner edge of the first reinforcing rib (6) and the inner edge of the second reinforcing rib (7) are both connected with the outer wall of the inner filter screen (2).

4. The denitration catalyst assembly of claim 1, further comprising a first flange assembly (4) and a second flange assembly (5), wherein the second flange assembly (5) is fixedly connected to the bottom of the outer layer filter screen (1) and the bottom of the inner layer filter screen (2), the first flange assembly (4) is fixedly connected to the top of the outer layer filter screen (1) and the top of the inner layer filter screen (2), the first flange assembly (4) is provided with a flue gas outlet (401), and the flue gas outlet (401) is communicated with the flue gas conveying cavity (3).

5. The denitration catalyst assembly of claim 4, wherein the bottom of the first flange assembly (4) is fittingly connected with the top of the outer filter screen (1) and the top of the inner filter screen (2) by a first snap structure.

6. The denitration catalyst assembly of claim 5, wherein the first snap-fit structure comprises a first annular boss (402) arranged at the bottom of the first flange assembly (4) and first clamping grooves (9) arranged at the top of the outer filter screen (1) and the top of the inner filter screen (2), the top edges of the outer filter screen (1) and the inner filter screen (2) extend towards the catalyst accommodating cavity (101) to form the first clamping grooves (9), and the outer edge of the first annular boss (402) is matched and clamped with the first clamping grooves (9).

7. The denitration catalyst assembly of claim 4, wherein the top of the second flange assembly (5) is fittingly connected with the bottom of the outer filter screen (1) and the bottom of the inner filter screen (2) by a second snap structure.

8. The denitration catalyst assembly of claim 7, wherein the second fastening structure comprises a second annular boss (501) arranged at the top of the second flange assembly (5) and a second clamping groove (10) arranged at the bottom of the outer filter screen (1) and the bottom of the inner filter screen (2), the bottom edges of the outer filter screen (1) and the inner filter screen (2) extend towards the catalyst accommodating cavity (101) to form the second clamping groove (10), and the second annular boss (501) is matched and clamped with the second clamping groove (10).

9. The denitration catalyst assembly according to claim 1, wherein a plurality of the catalyst particles (8) are spherical, cloverleaf-shaped, cylindrical and/or plate-shaped.

10. The denitration catalyst assembly according to claim 9, wherein the catalyst particles (8) have a plate-like structure, and a plurality of through holes (801) are uniformly arranged on the catalyst particles (8).

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