Denitration catalyst dipping device

Abstract

The utility model provides a denitration catalyst dipping device which comprises a dipping tank capable of rotating along the axial direction, a heating jacket is coated on the outer side of the dipping tank, a feed pipe, a discharge pipe and an exhaust pipe are arranged on the dipping tank, and a plurality of shoveling plates are arranged in the dipping tank along the circumferential direction of the inner wall of the dipping tank. According to the technical scheme, the outer side of the impregnation tank capable of rotating in the axial direction is coated with the heating jacket, heating is carried out in the impregnation process of the denitration catalyst, the impregnation efficiency is improved, meanwhile, the multiple shoveling plates are arranged in the impregnation tank in the circumferential direction of the inner wall of the impregnation tank, the flow disturbing and stirring effects are achieved, an impregnated object and impregnation liquid are fully mixed, and the impregnation efficiency is improved. And the impregnation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration catalyst preparation, in particular to a denitration catalyst impregnation device. Background Art

[0002] Selective catalytic reduction (SCR) technology has been widely used in denitrification projects in coal-fired power plants to convert nitrogen oxides (NOx) into harmless N 2 and H 2 O. Industrial denitration catalysts can be divided into three categories according to their structure: honeycomb, flat plate and corrugated plate. In recent years, in order to meet the needs of non-electrical fields such as industrial kilns and waste incineration, spherical, clover-shaped and strip denitration catalysts have also begun to attract the attention of researchers. Such as Chinese invention patents CN201710183979.4, CN202310490529.5, etc. This is because the flue gas temperature in the non-electrical field is generally low and the dust concentration is relatively low. The use of spherical, clover-shaped and strip denitration catalysts can increase the contact area between gas and solid and improve the denitration efficiency. However, in the existing denitration catalyst preparation process, the honeycomb denitration catalyst uses an extrusion device, the flat plate denitration catalyst uses a coating device, and the corrugated plate denitration catalyst uses a dip coating device. These devices are not suitable for the production of spherical, clover-shaped and strip denitration catalysts, because the shapes of these three catalysts are not traditional flat plates. If the extrusion device, coating device or dip coating device is used for dip coating, it is impossible to dip coat the entire surface, and the dip coating efficiency cannot be guaranteed. Utility Model Content

[0003] The utility model aims to provide a denitration catalyst impregnation device for preparing a denitration catalyst.

[0004] The utility model provides a denitration catalyst impregnation device, comprising an impregnation tank which can rotate along the axial direction, the outer side of the impregnation tank is covered with a heating jacket, a feed pipe, a discharge pipe and an exhaust pipe are installed on the impregnation tank, and a plurality of copying plates are arranged inside the impregnation tank along the circumferential direction of the inner wall thereof.

[0005] Furthermore, it also includes a base, the impregnation tank is rotatably mounted on the impregnation tank, and a motor for driving the impregnation tank to rotate is fixedly mounted on the base.

[0006] Furthermore, the impregnation tank is installed obliquely on the base, and the impregnation tank is inclined toward an end where the discharge pipe is provided.

[0007] Furthermore, the inclination angle of the impregnation tank is 5°-10°.

[0008] Furthermore, the copy board is provided with a plurality of water holes.

[0009] Furthermore, the copying plate is an arc-shaped plate, and at least three of the arc-shaped plates are installed on the inner wall of the impregnation tank at equal intervals.

[0010] Furthermore, it comprises a first feed pipe and a second feed pipe for injecting the impregnated object and the impregnating liquid respectively, and valves are installed on the first feed pipe, the second feed pipe, the discharge pipe and the exhaust pipe.

[0011] Furthermore, the rotation speed of the impregnation tank is 2-20 rpm.

[0012] Furthermore, the outlet end of the exhaust pipe is provided with a connection port for connecting to an air extraction pump.

[0013] The beneficial effects of the technical solution of the utility model over the prior art are as follows: the technical solution heats the denitration catalyst during impregnation by coating a heating jacket on the outside of an axially rotatable impregnation tank, thereby improving the impregnation efficiency; at the same time, a plurality of lifting plates are provided inside the impregnation tank along the circumferential direction of the inner wall thereof, which play the role of turbulence and stirring, so that the impregnated object and the impregnation liquid are fully mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram showing the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the impregnation tank in Example 2 of the utility model;

[0017] Explanation of the reference numerals: 1-motor, 2-immersion tank, 3-heating jacket, 4-first feed pipe, 5-second feed port, 6-exhaust pipe, 7-discharge pipe, 8-base, 9-copy plate, 10-valve. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] Example 1

[0022] like Figure 1 As shown, the utility model provides a denitration catalyst impregnation device, including a base 8 and an impregnation tank 2, the impregnation tank 2 is rotatably mounted on the base 8, the impregnation tank 2 can rotate along its own axis, and a motor 1 for driving the impregnation tank 2 to rotate is fixedly mounted on the base 8, the impregnation tank 2 is driven to rotate at a constant speed by the motor 1, and the rotation speed of the impregnation tank 2 can be controlled at 2-20rpm.

[0023] The outer side of the impregnation tank 2 is covered with a heating jacket 3 for heating the impregnation tank 2. The heating jacket 3 is fixedly mounted on the base and does not rotate with the impregnation tank. The heating temperature of the heating jacket 3 is 80-100°C. A feed pipe, a discharge pipe 7 and an exhaust pipe 6 are installed on the impregnation tank 2; two feed pipes are provided, specifically including a first feed pipe 4 and a second feed pipe 5 for injecting the impregnated object and the impregnation liquid respectively; valves 10 are installed on the first feed pipe 4, the second feed pipe 5, the discharge pipe 7 and the exhaust pipe 6; the outlet end of the exhaust pipe 6 is provided with a connection port for connecting to a vacuum pump, which is used to connect to the vacuum pump after the impregnation is completed to extract the water vapor in the impregnation tank 2.

[0024] A plurality of lifting plates 9 are arranged inside the impregnation tank 2 along the circumferential direction of the inner wall thereof, and a plurality of water holes are arranged on the lifting plates 9 so as not to affect the flow of the liquid.

[0025] In this embodiment, the impregnation tank 2 is installed obliquely on the base 8, and the impregnation tank 2 is inclined toward the end where the discharge pipe 7 is provided. The inclination angle of the impregnation tank 2 can be set to 5°-10°, which is convenient after the impregnation is completed.

[0026] The impregnated material is one of TiO2, ZSM-5 and SSZ-13, and the impregnating solution is one of copper nitrate aqueous solution, manganese nitrate aqueous solution and cerium nitrate aqueous solution or a combination of several of them.

[0027] Example 2

[0028] like Figure 2 As shown, the lifting plate 9 is an arc-shaped plate, and at least three arc-shaped plates are installed on the inner wall of the impregnation tank 2 at equal intervals. At least three arc-shaped plates form a spiral structure to enhance the turbulence effect.

[0029] The working principle of the device is as follows, taking TiO2 as an example:

[0030] ① Open the valve 10 of the first feed pipe 4 and add spherical TiO2 into the impregnation tank 2;

[0031] ② Open the valve 10 of the second feed pipe 5 and add the aqueous solution of manganese nitrate into the impregnation tank 2;

[0032] ③ Open the heating jacket 3, set the temperature to 80°C, start the motor 1, set the speed to 10 rpm, and stir for 4 hours;

[0033] ④ After the stirring is completed, open the exhaust pipe 6 and start the vacuum pump to discharge the water vapor in the impregnation tank 2;

[0034] ⑤ Open the discharge pipe 7 and discharge the impregnated spherical TiO2.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A denitration catalyst impregnation device, characterized in that: The invention comprises an axially rotatable impregnation tank, the outer side of which is covered with a heating jacket, a feed pipe, a discharge pipe and an exhaust pipe are installed on the impregnation tank, and a plurality of copying plates are arranged inside the impregnation tank along the circumferential direction of the inner wall thereof.

2. The denitration catalyst impregnation device according to claim 1, characterized in that: It also includes a base, the impregnation tank is rotatably mounted on the impregnation tank, and a motor for driving the impregnation tank to rotate is fixedly mounted on the base.

3. The denitration catalyst impregnation device according to claim 2, characterized in that: The impregnation tank is installed obliquely on the base, and the impregnation tank is inclined toward one end where a discharge pipe is arranged.

4. The denitration catalyst impregnation device according to claim 3, characterized in that: The inclination angle of the impregnation tank is 5°-10°.

5. The denitration catalyst impregnation device according to claim 1, characterized in that: The copying plate is provided with a plurality of water holes.

6. The denitration catalyst impregnation device according to claim 1, characterized in that: The lifting plate is an arc-shaped plate, and at least three arc-shaped plates are installed on the inner wall of the impregnation tank at equal intervals.

7. The denitration catalyst impregnation device according to claim 1, characterized in that: The invention comprises a first feed pipe and a second feed pipe for respectively injecting the impregnated object and the impregnating liquid, wherein valves are installed on the first feed pipe, the second feed pipe, the discharge pipe and the exhaust pipe.

8. The denitration catalyst impregnation device according to claim 1, characterized in that: The rotation speed of the impregnation tank is 2-20 rpm.

9. The denitration catalyst impregnation device according to claim 1, characterized in that: The outlet end of the exhaust pipe is provided with a connection port for connecting to an air extraction pump.

Images