Supported catalyst pretreatment device

Abstract

The utility model relates to the technical field of catalyst production, in particular to a supported catalyst pretreatment device. The supported catalyst pretreatment device comprises a dipping kettle and an ultrasonic cleaner, the ultrasonic cleaner 2 is connected with a drying box through a carrier filter, the drying box is connected with the dipping kettle through a carrier roasting furnace, the dipping kettle is connected with a product roasting furnace through a product filter, and a gas phase distributor is arranged in the dipping kettle. A filter cloth conveying belt is arranged between the carrier filter and the drying box. According to the device, the ultrasonic cleaner, the carrier filter, the filter cloth conveying belt and the gas phase purging disc are used in cooperation, after ultrasonic cleaning is completed, the carrier passes through the carrier filter and then enters the filter cloth conveying belt, a carrier on the filter cloth conveying belt is purged through high-temperature gas phases in the carrier roasting furnace, most of water and impurities on the surface of the carrier are removed, and the carrier roasting efficiency is improved. The drying time is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst production, in particular to a loaded catalyst pretreatment device. Background Art

[0002] Supported SCR denitration catalyst is a kind of catalyst used to remove nitrogen oxides (NO x ) catalyst. It is mainly composed of active components, carriers and additives (sometimes). The active component is the key part of the catalytic effect, usually some metal oxides (such as V2O5) or precious metals; the carrier is used to load the active component, providing a large specific surface area and good mechanical stability, and common ones are TiO2, Al2O3, etc. It is mainly used for denitrification of waste gas from fixed sources such as coal-fired power plants, industrial boilers, cement plants, and steel plants.

[0003] In the actual production process, it is generally necessary to pre-treat the raw materials of the catalyst. When the existing device processes the carrier, it is first stirred and cleaned, and then placed in a drying oven for drying. After drying, it is roasted. During operation, it is found that the stirring and cleaning has the problem of incomplete removal of impurities, and the cleaned carrier is simply filtered and then placed in the drying oven, which has the problem of excessive liquid content and long drying time. In the impregnation kettle treatment process, the impregnation temperature needs to be controlled. The existing device directly controls the temperature through heat transfer oil and a stirring paddle, which has the problem of large fluctuations when adjusting the temperature and uneven impregnation distribution. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a loaded catalyst pretreatment device, which, through the coordinated use of an ultrasonic cleaner, a carrier filter, a filter cloth conveyor belt and a gas phase purge disk, after ultrasonic cleaning, passes through the carrier filter and enters the filter cloth conveyor belt, and uses the high-temperature gas in the carrier roasting furnace to purge the carrier on the filter cloth conveyor belt to remove most of the moisture and impurities on its surface, thereby greatly reducing the drying time and improving the production efficiency; through the coordinated use of the product roasting furnace and the gas phase distributor, the high-temperature reduced mixed gas phase in the product roasting furnace is used in the impregnation kettle, which improves the heat utilization rate while greatly improving the mixing uniformity of the impregnation liquid and the carrier, thereby improving the product quality; through the setting of the product filter recovery port and the funnel-shaped discharge port, the impregnation liquid in the upper layer after precipitation is recycled, thereby greatly improving the utilization rate of the impregnation liquid and reducing the production cost.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The supported catalyst pretreatment device comprises an impregnation kettle and an ultrasonic cleaner, wherein the ultrasonic cleaner is connected to a drying oven via a carrier filter, the drying oven is connected to the impregnation kettle via a carrier roasting furnace, the impregnation kettle is connected to the product roasting furnace via a product filter, a gas phase distributor is arranged inside the impregnation kettle, and a filter cloth conveyor belt is arranged between the carrier filter and the drying oven.

[0007] The gas phase distributor is provided with dispersion holes, and the pipelines in the entire device are equipped with heat preservation devices.

[0008] The interior of the carrier filter is provided with an inclined filter screen, a gas phase purge plate is provided above the filter cloth conveyor belt, and the carrier roasting furnace is connected with the gas phase purge plate through a pipeline.

[0009] The impregnation kettle is provided with a stirring paddle inside, the gas phase distributor is located below the stirring paddle, the impregnation kettle is provided with a temperature control coil inside, and a heat insulation sleeve is provided outside. Heat transfer oil is provided in the temperature control coil.

[0010] The lowest end of the inclined filter is connected to the filter cloth conveyor belt, and the carrier slides onto the filter cloth conveyor belt by gravity.

[0011] A condensation tank is connected above the impregnation kettle, a condensation plate is arranged inside the condensation tank, and a cooling sleeve is arranged outside the condensation tank.

[0012] The impregnation kettle is connected with a liquid preparation tank through an inlet pipeline of the impregnation kettle, and a product dryer is arranged between the product filter and the product roasting furnace.

[0013] The product filter has a filter plate inside, a product filter recovery port outside the vertical wall of the product filter, a funnel-shaped discharge port below the product filter, and the product filter recovery port is located between the filter plate and the funnel-shaped discharge port.

[0014] A filter screen is provided at the product filter recovery port.

[0015] The product filter recovery port is connected to the inlet pipeline of the impregnation kettle through a return pipeline, and a recovery pump is arranged on the return pipeline.

[0016] The product roasting furnace is connected with a reducing mixed gas phase inlet pipeline, and the product roasting furnace is connected with the gas phase distributor through the gas phase inlet distributor pipeline.

[0017] The working principle of the utility model is:

[0018] After the carrier is treated by the ultrasonic cleaner and the carrier filter, it enters the filter cloth conveyor belt, and then enters the drying box for drying. After drying, it enters the carrier roasting furnace for roasting. After roasting, it enters the impregnation kettle, and the impregnation liquid in the liquid preparation tank enters the impregnation kettle, and the stirring paddle and gas phase distributor start working; after impregnation, the product passes through the product filter and enters the product dryer for drying, and then enters the product roasting furnace. The reduced mixed gas phase in the product roasting furnace enters the gas phase distributor through the gas phase distributor inlet pipe, and the impregnation liquid filtered by the product filter is recovered through the product filter recovery port and recovery pump. Among them, the gas phase distributor is provided with dispersion holes, and the pipes in the entire device are equipped with insulation devices.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model adopts the loaded catalyst pretreatment device, through the coordinated use of an ultrasonic cleaner, a carrier filter, a filter cloth conveyor belt and a gas phase purge disk, after ultrasonic cleaning, the carrier passes through the carrier filter and enters the filter cloth conveyor belt, and the high-temperature gas in the carrier roasting furnace is used to purge the carrier on the filter cloth conveyor belt, so as to remove most of the moisture and impurities on its surface, thereby greatly reducing the drying time and improving the production efficiency; through the coordinated use of the product roasting furnace and the gas phase distributor, the high-temperature reducing mixed gas phase in the product roasting furnace is used in the impregnation kettle, which improves the heat utilization rate and greatly improves the mixing uniformity of the impregnation liquid and the carrier, thereby improving the product quality; through the setting of the product filter recovery port and the funnel-shaped discharge port, the impregnation liquid in the upper layer after precipitation is recycled, thereby greatly improving the utilization rate of the impregnation liquid and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the supported catalyst pretreatment device of the utility model;

[0022] In the figure: 1. impregnation kettle; 2. ultrasonic cleaner; 3. carrier filter; 4. filter cloth conveyor belt; 5. drying box; 6. carrier roasting furnace; 7. liquid preparation tank; 8. product filter; 9. product dryer; 10. product roasting furnace; 11. inclined filter screen; 12. gas phase purge plate; 13. stirring paddle; 14. gas phase distributor; 15. condensation tank; 16. condensation plate; 17. pipeline for impregnation kettle inlet; 18. pipeline for reducing mixed gas phase inlet; 19. pipeline for gas phase distributor inlet; 20. product filter recovery port; 21. funnel-shaped discharge port; 22. recovery pump; 23. return pipeline. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] like Figure 1 As shown, the pretreatment device for supported catalyst comprises an impregnation kettle 1 and an ultrasonic cleaner 2. The ultrasonic cleaner 2 is connected to a drying oven 5 through a carrier filter 3. The drying oven 5 is connected to the impregnation kettle 1 through a carrier calcining furnace 6. The impregnation kettle 1 is connected to a product calcining furnace 10 through a product filter 8. A gas phase distributor 14 is provided inside the impregnation kettle 1. A filter cloth conveyor belt 4 is provided between the carrier filter 3 and the drying oven 5. An inclined filter screen 11 is provided inside the carrier filter 3. A gas phase purge plate 12 is provided above the filter cloth conveyor belt 4. The carrier calcining furnace 6 is connected to the gas phase purge plate 12 through a pipeline. A stirring paddle 13 is provided inside the impregnation kettle 1. The gas phase distributor 14 is located below the stirring paddle 13. A temperature control coil is provided inside the impregnation kettle 1 and a heat preservation sleeve is provided outside. The lowest end of the inclined filter screen 11 is connected to the filter cloth conveyor belt 4, and the carrier slides onto the filter cloth conveyor belt 4 by gravity. A condensation tank 15 is connected to the top of the impregnation kettle 1, a condensation plate 16 is arranged inside the condensation tank 15, and a cooling sleeve is arranged outside the condensation tank 15. The impregnation kettle 1 is connected to the liquid preparation tank 7 through the impregnation kettle inlet pipe 17, and a product dryer 9 is arranged between the product filter 8 and the product roasting furnace 10. A filter plate is arranged inside the product filter 8, a product filter recovery port 20 is arranged outside the vertical wall of the product filter 8, and a funnel-shaped discharge port 21 is arranged below the product filter 8, and the product filter recovery port 20 is located between the filter plate and the funnel-shaped discharge port 21. The product filter recovery port 20 is connected to the impregnation kettle inlet pipe 17 through a return pipe 23, and a recovery pump 22 is arranged on the return pipe 23. The product roasting furnace 10 is connected to the reduction mixed gas phase inlet pipe 18, and the product roasting furnace 10 is connected to the gas phase distributor 14 through the gas phase inlet distributor pipe 19.

[0026] The above-mentioned supported catalyst pretreatment device, when in operation, comprises the following steps:

[0027] (1) After the carrier is treated by the ultrasonic cleaner 2, it passes through the carrier filter 3 and enters the filter cloth conveyor 4, and then enters the drying box 5 for drying. After the drying is completed, it enters the carrier roasting furnace 6 for roasting. After the roasting is completed, it enters the impregnation kettle 1. The impregnation liquid in the liquid preparation tank 7 enters the impregnation kettle 1, and the stirring paddle 13 and the gas phase distributor 14 start working; (2) After the impregnation is completed, the product passes through the product filter 8 and enters the product dryer 9 for drying, and then enters the product roasting furnace 10. The reduced mixed gas in the product roasting furnace 10 enters the gas phase distributor 14 through the gas phase distributor inlet pipe 19. The impregnation liquid filtered by the product filter 8 is recovered through the product filter recovery port 20 and the recovery pump 22.

Claims

1. A supported catalyst pretreatment device, characterized in that: The invention comprises an impregnation kettle (1) and an ultrasonic cleaner (2), wherein the ultrasonic cleaner (2) is connected to a drying oven (5) via a carrier filter (3), the drying oven (5) is connected to the impregnation kettle (1) via a carrier roasting furnace (6), the impregnation kettle (1) is connected to a product roasting furnace (10) via a product filter (8), a gas phase distributor (14) is provided inside the impregnation kettle (1), and a filter cloth conveyor belt (4) is provided between the carrier filter (3) and the drying oven (5).

2. The supported catalyst pretreatment device according to claim 1, characterized in that: The carrier filter (3) is provided with an inclined filter screen (11) inside, a gas phase purge plate (12) is provided above the filter cloth conveyor belt (4), and the carrier roasting furnace (6) is connected to the gas phase purge plate (12) via a pipeline.

3. The supported catalyst pretreatment device according to claim 1, characterized in that: The impregnation kettle (1) is provided with a stirring paddle (13) inside, and the gas phase distributor (14) is located below the stirring paddle (13). The impregnation kettle (1) is provided with a temperature control coil inside and a heat preservation jacket outside.

4. The supported catalyst pretreatment device according to claim 1, characterized in that: A condensation tank (15) is connected to the top of the impregnation kettle (1), a condensation plate (16) is provided inside the condensation tank (15), and a cooling jacket is provided outside the condensation tank (15).

5. The supported catalyst pretreatment device according to claim 1, characterized in that: The impregnation kettle (1) is connected to a liquid preparation tank (7) via an impregnation kettle inlet pipe (17), and a product dryer (9) is provided between the product filter (8) and the product roasting furnace (10).

6. The supported catalyst pretreatment device according to claim 5, characterized in that: The product filter (8) is provided with a filter plate inside, a product filter recovery port (20) is provided on the outer side of the vertical wall of the product filter (8), a funnel-shaped discharge port (21) is provided below the product filter (8), and the product filter recovery port (20) is located between the filter plate and the funnel-shaped discharge port (21).

7. The supported catalyst pretreatment device according to claim 6, characterized in that: The product filter recovery port (20) is connected to the inlet pipe (17) of the impregnation kettle via a return pipe (23), and a recovery pump (22) is provided on the return pipe (23).

8. The supported catalyst pretreatment device according to claim 1, characterized in that: The product roasting furnace (10) is connected to a reducing mixed gas phase inlet pipeline (18), and the product roasting furnace (10) is connected to the gas phase distributor (14) via a gas phase inlet distributor pipeline (19).

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