Diesel engine exhaust emission DOC oxidation catalyst preparation device

Abstract

The utility model discloses a diesel engine exhaust emission DOC oxidation type catalyst preparation device which comprises a drying barrel, a first soaking box and a second soaking box, the first soaking box is located above the second soaking box, a communicating pipe is fixedly connected between the bottom of the first soaking box and the top of the second soaking box, and the communicating pipe is communicated with the drying barrel. And an inclined first separation net is fixedly connected to the inner wall of the first soaking box, an inclined second separation net is fixedly connected to the inner wall of the second soaking box, and a first conveying pipe is fixedly connected between the first soaking box and the drying barrel. According to the catalyst raw material drying device, catalyst raw materials soaked for the first time enter the drying barrel through the first conveying pipe, the drying barrel is started to heat and dry the catalyst raw materials, and meanwhile the pushing and scattering assembly pushes and scatters the catalyst raw materials on the conical plate; and the problems of non-uniform heating and low drying efficiency of the catalyst raw materials caused by accumulation of the raw materials are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst preparation, in particular to a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions. Background Technique

[0002] In a chemical reaction, a substance that can change the chemical reaction rate of other substances, while its own mass and chemical properties remain unchanged before and after the reaction, is called a catalyst, also known as a catalyst. Its physical properties may change. The DOC oxidation catalyst can be used for purifying the exhaust gas of diesel engines. When preparing the existing DOC catalyst for diesel engine exhaust emissions, the soaking method is often used. Most of the catalyst preparation methods by the soaking method use multiple soakings, and the soaking solution often needs to be replaced multiple times.

[0003] For example, a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions disclosed in Patent Application No. 201921473113.8 includes an electric control box, and also includes a drying barrel in a cylindrical shape. Two soaking barrels with a horizontal cross-section in a semi-circular structure are symmetrically arranged on both sides of the outside of the drying barrel. The vertical direction of the soaking barrel is divided into a first soaking chamber and a second soaking chamber. The side end faces of the first soaking chamber and the second soaking chamber are connected by a communication valve. In this comparative document, by putting the catalyst raw material into the soaking barrel, the inside of the first soaking chamber is filled with the soaking solution. After the initial soaking of the catalyst raw material is completed, the communication valve between the first soaking chamber and the second soaking chamber is opened, and the soaking solution fills the second soaking chamber to prepare for the secondary soaking of the catalyst raw material, thus greatly saving the use of the soaking solution and conveniently exchanging the soaking solution in the first soaking chamber and the second soaking chamber, reducing the cost of catalyst preparation.

[0004] However, the above device still has the following defects. When drying the catalyst raw material, the catalyst raw materials will pile up together, resulting in uneven heating of the catalyst raw materials and too long drying time, thus affecting the preparation efficiency of the catalyst. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions, which solves the problems put forward in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model is realized by the following technical solutions: A preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions, comprising a drying barrel, a first soaking tank and a second soaking tank. The first soaking tank is located above the second soaking tank. A communicating pipe is fixedly connected between the bottom of the first soaking tank and the top of the second soaking tank. A first partition net which is inclined is fixedly connected to the inner wall of the first soaking tank. A second partition net which is inclined is fixedly connected to the inner wall of the second soaking tank. A first conveying pipe is fixedly connected between the first soaking tank and the drying barrel. A second conveying pipe and a third conveying pipe are fixedly connected between the second soaking tank and the drying barrel. A conical plate is fixedly connected to the inner wall of the drying barrel. The second conveying pipe is located above the conical plate. A spreading component is arranged between the conical plate and the top wall of the drying barrel;

[0009] The spreading component includes a motor fixed to the outer top of the drying barrel and a rotating shaft fixed to the output end of the motor. The lower end of the rotating shaft penetrates into the drying barrel. A pushing plate is fixedly connected to the rotating shaft. Stirring rods are fixedly connected to the pushing plate.

[0010] Preferably, a spiral conveying component is arranged inside the drying barrel. The spiral conveying component is located below the conical plate. The spiral conveying component includes a spiral housing arranged in suspension, a bracket fixedly connected to the outer side wall of the spiral housing. The other end of the bracket is fixedly connected to the inner wall of the drying barrel. A plurality of rotating blades which can rotate are arranged inside the spiral housing. The lower end of the rotating shaft is fixedly connected to all the rotating blades.

[0011] Preferably, a feed inlet is fixedly connected to the top of the first soaking tank. A liquid outlet is fixedly connected to the bottom of the second soaking tank. A liquid outlet valve is arranged on the liquid outlet.

[0012] Preferably, a discharge outlet is fixedly connected to the bottom of the drying barrel. A discharge valve is arranged on the discharge outlet.

[0013] Preferably, control valves are arranged on the first conveying pipe, the second conveying pipe and the third conveying pipe. A communicating valve is arranged on the communicating pipe.

[0014] Preferably, a fixing frame is fixedly connected between the second soaking tank and the drying barrel.

[0015] (III) Beneficial effects

[0016] The utility model provides a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions, which has the following beneficial effects:

[0017] 1. In the present utility model, after the catalyst raw materials are soaked well in the first soaking tank, the connection valve on the connecting pipe is opened, and the soaking liquid inside the first soaking tank is discharged into the second soaking tank. After completion, the catalyst raw materials on the first partition net enter the drying barrel through the first conveying pipe. The drying barrel is started to heat and dry the catalyst raw materials. At the same time, the motor is started to drive the rotating shaft to rotate, so that the pushing plate and the stirring rod push and disperse the catalyst raw materials on the conical plate, avoiding the problems of uneven heating and low drying efficiency caused by the raw materials piling up together. After drying, the catalyst raw materials are conveyed to the second soaking tank through the second conveying pipe under the pushing action of the pushing plate and the stirring rod for the second soaking.

[0018] 2. In the present utility model, after the soaking liquid inside the second soaking tank is discharged through the liquid outlet, the catalyst raw materials inside the second soaking tank are conveyed to the drying barrel through the third conveying pipe for drying. The rotating blades inside the spiral conveying assembly transport the catalyst raw materials upward and finally disperse and fall, achieving the purpose of preventing the catalyst raw materials from piling up and circular drying, and improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view structure diagram of a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions proposed by the present utility model;

[0020] Figure 2 is a sectional view structure diagram of a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions proposed by the present utility model.

[0021] In the figure: 1, drying barrel; 2, pushing and dispersing assembly; 21, motor; 22, rotating shaft; 23, pushing plate; 24, stirring rod; 3, spiral conveying assembly; 31, spiral housing; 32, support; 33, rotating blade; 4, first soaking tank; 5, second soaking tank; 6, fixing frame; 7, feed inlet; 8, connecting pipe; 9, liquid outlet; 10, first conveying pipe; 11, second conveying pipe; 12, third conveying pipe; 13, discharge outlet; 14, first partition net; 15, second partition net; 16, conical plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Please refer to Figures 1 to 2, the utility model provides a technical solution: a preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions, including a drying barrel 1, a first soaking tank 4 and a second soaking tank 5. The first soaking tank 4 is located above the second soaking tank 5. A communicating pipe 8 is fixedly connected between the bottom of the first soaking tank 4 and the top of the second soaking tank 5. A first partition net 14 which is inclined is fixedly connected to the inner wall of the first soaking tank 4, and a second partition net 15 which is inclined is fixedly connected to the inner wall of the second soaking tank 5. Since both the first partition net 14 and the second partition net 15 are inclined, the catalyst can descend under the action of gravity. A first conveying pipe 10 is fixedly connected between the first soaking tank 4 and the drying barrel 1, and a second conveying pipe 11 and a third conveying pipe 12 are fixedly connected between the second soaking tank 5 and the drying barrel 1. A conical plate 16 is fixedly connected to the inner wall of the drying barrel 1. The second conveying pipe 11 is located above the conical plate 16. A spreading component 2 is arranged between the conical plate 16 and the top wall of the drying barrel 1;

[0024] The spreading component 2 includes a motor 21 fixed to the outer top of the drying barrel 1 and a rotating shaft 22 fixed to the output end of the motor 21. The lower end of the rotating shaft 22 penetrates into the drying barrel 1. A pushing plate 23 is fixedly connected to the rotating shaft 22, and a stirring rod 24 is fixedly connected to the pushing plate 23.

[0025] After the catalyst raw material is soaked well in the first soaking tank 4, open the communicating valve on the communicating pipe 8 to discharge the soaking liquid inside the first soaking tank 4 into the second soaking tank 5. After completion, the catalyst raw material on the first partition net 14 enters the drying barrel 1 through the first conveying pipe 10. Start the heating element inside the drying barrel 1 to heat and dry the catalyst raw material. The drying barrel 1 is internally provided with a heating element, which can be embedded inside the inner wall of the drying barrel 1, which is prior art; at the same time, start the motor 21 to drive the rotating shaft 22 to rotate, so that the pushing plate 23 and the stirring rod 24 push and disperse the catalyst raw material on the conical plate 16, avoiding the problems that the raw materials are piled up together, resulting in uneven heating of the catalyst raw material and low drying efficiency. The dried catalyst raw material is pushed by the pushing plate 23 and the stirring rod 24 and is conveyed to the second soaking tank 5 through the second conveying pipe 11 for secondary soaking.

[0026] A spiral conveying component 3 is arranged inside the drying barrel 1. The spiral conveying component 3 is located below the conical plate 16. The spiral conveying component 3 includes a spiral housing 31 arranged in suspension, a bracket 32 fixedly connected to the outer side wall of the spiral housing 31, and the other end of the bracket 32 is fixedly connected to the inner wall of the drying barrel 1. A plurality of rotating blades 33 which can rotate are arranged inside the spiral housing 31. The plurality of rotating blades 33 are connected end to end to form a auger conveying structure; the lower end of the rotating shaft 22 is fixedly connected to all the rotating blades 33, and the rotating shaft 22 vertically penetrates through the plurality of rotating blades 33.

[0027] After discharging the soaking liquid inside the second soaking tank 5 through the liquid outlet 9, the catalyst raw material inside the second soaking tank 5 is transported to the drying barrel 1 through the third conveying pipe 12 for drying. The rotating blades 33 inside the screw conveying assembly 3 rotate along with the rotating shaft 22, so that the rotating blades 33 transport the catalyst raw material upward and finally disperse and fall, achieving the purpose of preventing the accumulation of the catalyst raw material and circular drying, and improving the drying efficiency.

[0028] A feed inlet 7 is fixedly connected to the top of the first soaking tank 4 for feeding the catalyst raw material into the first soaking tank 4; a liquid outlet 9 is fixedly connected to the bottom of the second soaking tank 5, and a liquid outlet valve is arranged on the liquid outlet 9. By opening the liquid outlet valve, the liquid inside the second soaking tank 5 is discharged through the liquid outlet 9.

[0029] A discharge outlet 13 is fixedly connected to the bottom of the drying barrel 1, and a discharge valve is arranged on the discharge outlet 13. By opening the discharge valve, the catalyst inside the drying barrel 1 is discharged through the discharge outlet 13.

[0030] Control valves are arranged on the first conveying pipe 10, the second conveying pipe 11, and the third conveying pipe 12, and a communication valve is arranged on the communication pipe 8, all of which achieve the purpose of opening and closing the corresponding pipes.

[0031] A fixing frame 6 is fixedly connected between the second soaking tank 5 and the drying barrel 1, increasing the connection strength between the second soaking tank 5 and the fixing frame 6, reducing the load at the second conveying pipe 11 and the third conveying pipe 12, and improving the service life.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions, characterized in that: It includes a drying barrel (1), a first soaking tank (4) and a second soaking tank (5). The first soaking tank (4) is located above the second soaking tank (5). A communicating pipe (8) is fixedly connected between the bottom of the first soaking tank (4) and the top of the second soaking tank (5). A first partition net (14) which is inclined is fixedly connected to the inner wall of the first soaking tank (4). A second partition net (15) which is inclined is fixedly connected to the inner wall of the second soaking tank (5). A first conveying pipe (10) is fixedly connected between the first soaking tank (4) and the drying barrel (1). A second conveying pipe (11) and a third conveying pipe (12) are fixedly connected between the second soaking tank (5) and the drying barrel (1). A conical plate (16) is fixedly connected to the inner wall of the drying barrel (1). The second conveying pipe (11) is located above the conical plate (16). A pushing and spreading assembly (2) is arranged between the conical plate (16) and the top wall of the drying barrel (1); The pushing and spreading assembly (2) includes a motor (21) fixed to the outer top of the drying barrel (1), and a rotating shaft (22) fixed to the output end of the motor (21). The lower end of the rotating shaft (22) penetrates into the interior of the drying barrel (1). A pushing plate (23) is fixedly connected to the rotating shaft (22). Stirring rods (24) are fixedly connected to the pushing plate (23).

2. The preparation device of a DOC oxidation catalyst for diesel engine exhaust emissions according to claim 1, characterized in that: A spiral conveying assembly (3) is arranged inside the drying barrel (1). The spiral conveying assembly (3) is located below the conical plate (16). The spiral conveying assembly (3) includes a spiral outer shell (31) arranged in a suspended manner, and a bracket (32) fixedly connected to the outer side wall of the spiral outer shell (31). The other end of the bracket (32) is fixedly connected to the inner wall of the drying barrel (1). A plurality of rotatable blades (33) are arranged inside the spiral outer shell (31). The lower end of the rotating shaft (22) is fixedly connected to all the blades (33).

3. A preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions according to claim 1, characterized in that: A feed inlet (7) is fixedly connected to the top of the first soaking tank (4). A liquid outlet (9) is fixedly connected to the bottom of the second soaking tank (5). A liquid outlet valve is arranged on the liquid outlet (9).

4. A preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions according to claim 1, characterized in that: A discharge outlet (13) is fixedly connected to the bottom of the drying barrel (1). A discharge valve is arranged on the discharge outlet (13).

5. A preparation device for a DOC oxidation catalyst for diesel engine exhaust emissions according to claim 1, characterized in that: Control valves are arranged on the first conveying pipe (10), the second conveying pipe (11) and the third conveying pipe (12). A communicating valve is arranged on the communicating pipe (8).

6. The preparation device of a DOC oxidation catalyst for diesel engine exhaust emissions according to claim 1, characterized in that: A fixing frame (6) is fixedly connected between the second soaking tank (5) and the drying barrel (1).

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