CN218423752U - Denitration catalyst's dip-coating device - Google Patents
Denitration catalyst's dip-coating device Download PDFInfo
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- CN218423752U CN218423752U CN202222650264.4U CN202222650264U CN218423752U CN 218423752 U CN218423752 U CN 218423752U CN 202222650264 U CN202222650264 U CN 202222650264U CN 218423752 U CN218423752 U CN 218423752U
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Abstract
The utility model belongs to the technical field of the preparation technique of catalyst and specifically relates to a dip-coating device of denitration catalyst is related to, include: dip-coating container, heating jacket, vacuum-pumping pipeline, slurry pipeline, temperature detector, pressure detector, discharge pipeline, catalyst carrier and screen mesh; the catalyst carrier is placed on a screen, a certain amount of catalyst slurry is injected into the dip-coating container, and the vacuum-pumping pipeline is utilized to keep the dip-coating container in a negative pressure state, so that the catalyst slurry is quickly filled in the catalyst carrier pore channel; after the pressure in the dip-coating container was released and the catalyst slurry was drained, the water on the catalyst carrier was removed by a heating mantle, and the catalyst was taken out after cooling to room temperature. The utility model is simple in operation, high-efficient, can be on the catalyst carrier quick, even load catalyst, be applicable to the denitration catalyst of not unidimensional, specification moreover.
Description
Technical Field
The utility model belongs to the technical field of the preparation technique of catalyst and specifically relates to a dip-coating device of denitration catalyst is related to.
Background
Nitrogen Oxides (NO) x ) Is an important atmospheric pollutant and can cause environmental problems such as photochemical smog, ozone holes, acid rain and the like. To realize NO x The Selective Catalytic Reduction (SCR) technology is generally adopted at home and abroad to purify the coal-fired flue gas. The denitration catalyst is the core of SCR technology, and the main structure comprises three types, namely honeycomb type, flat plate type and corrugated plate type. Among them, the honeycomb denitration catalyst has the highest market share. The cordierite honeycomb ceramic is a common carrier for preparing a honeycomb denitration catalyst, and in order to load the catalyst on the cordierite honeycomb ceramic, catalyst powder is required to be prepared into slurry, and then the slurry is deposited on the surface of the cordierite honeycomb ceramic by a dip-coating method. The existing catalyst dip-coating technology is mainly to directly soak a catalyst carrier in catalyst slurry for a period of time, but the method has long soaking time, the catalyst carrier needs to be transferred to an oven for drying after the dip-coating is finished, the operation is troublesome, and the dip-coating uniformity of the catalyst carrier can be damaged by directly contacting the catalyst carrier in the transfer process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dip-coating device of denitration catalyst, the device easy operation, high efficiency can be quick on the catalyst carrier, even load catalyst, are applicable to the denitration catalyst of not unidimensional, specification moreover.
The utility model provides a dip-coating device of denitration catalyst, it includes: dip-coating container, heating jacket, vacuum-pumping pipeline, slurry pipeline, temperature detector, pressure detector, discharge pipeline, catalyst carrier and screen; the heating sleeve is arranged on the outer surface of the dip-coating container; the vacuum-pumping pipeline, the slurry pipeline, the temperature detector and the pressure detector are respectively connected to the top of the dip-coating container; the discharging pipeline is connected to the bottom of the dip-coating container; the screen is arranged in the dip-coating container, and the catalyst carrier is arranged on the screen.
Preferably, the top of the dip-coating container is provided with a dip-coating container cover, and the vacuumizing pipeline, the slurry pipeline, the temperature detector and the pressure detector are respectively arranged on the dip-coating container cover.
Preferably, a dip coating container handle is arranged on the dip coating container cover.
Preferably, the dip coating container handle is in the shape of a T-bar.
Preferably, the catalyst carrier is a cordierite honeycomb ceramic carrier or a metal honeycomb carrier.
Preferably, the screen is a stainless steel screen of 100 to 300 meshes.
Preferably, one end of the vacuumizing pipeline is connected with a vacuum pump, and a vacuumizing pipeline valve is arranged on the vacuumizing pipeline.
Preferably, a slurry pipeline valve is arranged on the slurry pipeline.
Preferably, a discharging pipeline valve is arranged on the discharging pipeline.
Preferably, the dip coating container has a cylindrical shape or a conical cylindrical shape.
Has the advantages that:
the technical proposal of the utility model is that the catalyst carrier is placed on the screen, after a certain amount of catalyst slurry is injected into the dip-coating container, the vacuum-pumping pipeline is utilized to keep the dip-coating container in a negative pressure state, so that the catalyst slurry is rapidly filled in the catalyst carrier pore channel; after the pressure in the dip-coating container was released and the catalyst slurry was drained, the water on the catalyst carrier was removed by a heating mantle, and the catalyst was taken out after cooling to room temperature. The utility model is simple in operation, high-efficient, can be on the catalyst carrier quick, even load catalyst, be applicable to the denitration catalyst of not unidimensional, specification moreover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dip-coating device for a denitration catalyst provided by the present invention;
description of reference numerals:
1-dip coating a container; 2-heating a jacket; 3-dip coating of the container lid; 4-vacuum-pumping pipeline; 5-slurry piping; 6-a temperature detector; 7-dip coating the container handle; 8-a pressure detector; 9-a discharge pipeline; 10-a catalyst support; 11-screen mesh.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
As shown in fig. 1, the present embodiment provides a dip coating apparatus for a denitration catalyst, including: the device comprises a dip-coating container 1, a heating jacket 2, a vacuum-pumping pipeline 4, a slurry pipeline 5, a temperature detector 6, a pressure detector 8, a discharge pipeline 9, a catalyst carrier 10 and a screen 11; the heating sleeve 2 is arranged on the outer surface of the dip-coating container 1; the vacuum-pumping pipeline 4, the slurry pipeline 5, the temperature detector 6 and the pressure detector 8 are respectively connected to the top of the dip-coating container 1; the discharging pipeline 9 is connected to the bottom of the dip coating container 1; the mesh 11 is provided inside the dip coating container 1, and the catalyst carrier 10 is provided on the mesh 11. The embodiment has simple and efficient operation, can quickly and uniformly load the catalyst on the catalyst carrier 10, and is suitable for denitration catalysts with different sizes and specifications.
Preferably, the heating jacket 2 applies heat to the dip coating vessel 1 in the form of electrical heating. After the dip-coating is finished, the dip-coating container 1 is heated through the heating sleeve 2, the catalyst carrier 10 does not need to be transferred into an oven for drying, the operation is simple, and the dip-coating uniformity of the catalyst carrier is prevented from being damaged by directly contacting the catalyst carrier 10 in the transfer process.
In this embodiment, preferably, the dip coating container cover 3 is disposed on the top of the dip coating container 1, the dip coating container cover 3 is openable and closable, and the vacuuming pipe 4, the slurry pipe 5, the temperature detector 6, and the pressure detector 8 are disposed on the dip coating container cover 3, respectively. In this embodiment, the form of the dip coating container cover 3 is not limited, and can be flexibly set according to actual needs. For example: in this embodiment, the dip coating container lid 3 is a circular cover plate, which covers an area larger than the upper opening of the dip coating container 1. Of course, in order to increase the sealing performance, other types of cover plates may be adopted, and a seal ring may be added.
In this embodiment, it is preferable that the dip coating container cover 3 is provided with a dip coating container handle 7. Preferably, dip coating container handle 7 is in the shape of a T-bar to facilitate extraction.
In the present embodiment, the catalyst carrier 10 is preferably a honeycomb catalyst carrier, and more preferably, a cordierite honeycomb ceramic carrier or a metal honeycomb carrier.
In this embodiment, the screen 11 is preferably a stainless steel screen of 100 to 300 mesh. The edges of the screen 11 may be fixedly attached to the inner wall of the dip coating vessel 1, or detachably attached, for example: a circle of elastic edges are arranged around the screen mesh 11, and a clamping groove used for being matched with the elastic edges is arranged on the inner wall of the dip-coating container 1.
In this embodiment, preferably, one end of the vacuum pipe 4 is connected to a vacuum pump, and the vacuum pipe 4 is provided with a vacuum pipe valve. The vacuum pump is opened to pump the pressure in the dip-coating container 1 to negative pressure, the vacuum pumping pipeline valve is closed, and the negative pressure is kept for a period of time, so that the catalyst slurry is quickly filled in the catalyst carrier pore channel, and the dip-coating time is greatly shortened.
In this embodiment, it is preferable that the slurry pipe 5 is provided with a slurry pipe valve, and the catalyst slurry can be injected into the dip coating vessel 1 by opening the slurry pipe valve.
In this embodiment, when preparing the catalyst slurry, the catalyst powder is first porphyrized, then added to the mixed solution of the alumina sol and the deionized water, the dilute nitric acid is added to adjust the pH of the slurry to 3-4, and the mixture is vigorously stirred at room temperature for 4-10 hours. And then, adding hydroxymethyl cellulose to adjust the viscosity of the slurry, violently stirring for 1-2 hours, heating to 60 ℃, and violently stirring for 4-10 hours to form catalyst slurry with the viscosity of 500-1000 cps.
In this embodiment, preferably, the discharging pipe 9 is provided with a discharging pipe valve, and the discharging pipe valve is opened to drain the catalyst slurry and then closed.
In this embodiment, the shape of the dip coating container 1 is preferably cylindrical or conical, but the shape and size of the dip coating container 1 are not limited, and can be flexibly adjusted according to actual needs to adapt to denitration catalysts of different sizes and specifications.
The application method of the dip-coating device for the denitration catalyst comprises the following steps:
s1, placing a catalyst carrier 10 on a screen 11;
s2, closing the top cover 3 of the dip-coating container, opening a slurry pipeline valve, injecting a certain amount of catalyst slurry, enabling the catalyst slurry to submerge the top end of the catalyst carrier 10, and closing the slurry pipeline valve;
s3, opening a vacuumizing pipeline valve, opening a vacuum pump, vacuumizing the pressure in the dip-coating container to-0.1 to-0.2 MPa (preferably-0.2 MPa), closing the vacuumizing pipeline valve, keeping the negative pressure for 3 to 10min (preferably 5 min), and quickly filling the pore channel of the catalyst carrier 10 with the catalyst slurry;
s4, opening a vacuumizing pipeline valve, releasing the pressure in the dip-coating container 1, opening a discharging pipeline valve, and closing after discharging the catalyst slurry;
s5, opening the heating jacket 2, raising the temperature to 80-100 ℃ (preferably 90 ℃), keeping the temperature for 30-120 min (preferably 60 min), removing the water on the catalyst carrier, and cooling;
and S6, opening the top cover 3 of the dip-coating container when the temperature in the dip-coating container 1 is reduced to the room temperature, and taking out the catalyst.
To sum up, the utility model is simple in operation, high-efficient, can be on the catalyst carrier quick, even load catalyst, be applicable to the denitration catalyst of not unidimensional, specification moreover.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A dip-coating device of a denitration catalyst is characterized by comprising: the device comprises a dip-coating container (1), a heating sleeve (2), a vacuum-pumping pipeline (4), a slurry pipeline (5), a temperature detector (6), a pressure detector (8), a discharging pipeline (9), a catalyst carrier (10) and a screen (11); the heating sleeve (2) is arranged on the outer surface of the dip-coating container (1); the vacuumizing pipeline (4), the slurry pipeline (5), the temperature detector (6) and the pressure detector (8) are respectively connected to the top of the dip-coating container (1); the discharging pipeline (9) is connected to the bottom of the dip-coating container (1); the screen (11) is arranged inside the dip-coating container (1), and the catalyst carrier (10) is arranged on the screen (11).
2. The dipping device of denitration catalyst according to claim 1, wherein a dipping container cover (3) is provided on the top of the dipping container (1), and the vacuuming pipe (4), the slurry pipe (5), the temperature detector (6), and the pressure detector (8) are respectively provided on the dipping container cover (3).
3. The dip-coating apparatus for a denitration catalyst according to claim 2, wherein a dip-coating vessel handle (7) is provided on the dip-coating vessel cover (3).
4. The dip-coating apparatus for a denitration catalyst according to claim 3, wherein the dip-coating vessel handle (7) is in the shape of a T-bar.
5. The dip coating apparatus for a denitration catalyst according to claim 1, wherein the catalyst carrier (10) is a cordierite honeycomb ceramic carrier or a metal honeycomb carrier.
6. The dip coating apparatus for a denitration catalyst according to claim 1, wherein the mesh (11) is a stainless steel mesh of 100 to 300 mesh.
7. The dip-coating device of a denitration catalyst according to claim 1, wherein one end of the vacuuming pipeline (4) is connected with a vacuum pump, and a vacuuming pipeline valve is arranged on the vacuuming pipeline (4).
8. The dip-coating apparatus for a denitration catalyst according to claim 1, wherein a slurry pipe valve is provided on the slurry pipe (5).
9. The dip-coating apparatus for a denitration catalyst according to claim 1, wherein a discharge pipe valve is provided on the discharge pipe (9).
10. The dip-coating apparatus for a denitration catalyst according to claim 1, wherein the dip-coating vessel (1) has a cylindrical or conical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222650264.4U CN218423752U (en) | 2022-10-09 | 2022-10-09 | Denitration catalyst's dip-coating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222650264.4U CN218423752U (en) | 2022-10-09 | 2022-10-09 | Denitration catalyst's dip-coating device |
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| CN218423752U true CN218423752U (en) | 2023-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116493184A (en) * | 2023-06-26 | 2023-07-28 | 淄博齐茂催化剂有限公司 | Gasoline hydrofining catalyst preparation facilities |
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2022
- 2022-10-09 CN CN202222650264.4U patent/CN218423752U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116493184A (en) * | 2023-06-26 | 2023-07-28 | 淄博齐茂催化剂有限公司 | Gasoline hydrofining catalyst preparation facilities |
| CN116493184B (en) * | 2023-06-26 | 2023-09-22 | 淄博齐茂催化剂有限公司 | Gasoline hydrofining catalyst preparation facilities |
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