Auxiliary device for coating SDPF catalyst

Abstract

The utility model provides an auxiliary device for SDPF catalyst coating, and relates to the field of diesel engine tail gas treatment. The auxiliary device for coating the SDPF catalyst comprises a fixing mechanism, the fixing mechanism comprises an inclined fixing long seat, a fixing groove suitable for loading a DPF carrier sample is formed in the fixing long seat, and a reading ruler is arranged on the outer surface of the fixing long seat; the extension directions of the fixed groove and the reading ruler are consistent with the fixed long seat; the liquid adding mechanism is used for dropwise adding SCR slurry into the DPF carrier small sample, the liquid adding mechanism is arranged above the fixed long seat, and a liquid adding point of the liquid adding mechanism is located at the highest position of the DPF carrier small sample; the device further comprises an infrared moisture meter, the infrared moisture meter is arranged above the fixed long seat, and a detection point of the infrared moisture meter is located in an area, covered by the SCR slurry, in the SDPF catalyst. According to the utility model, the flowability and the water-retaining property of SCR slurry of different processes can be tested on a DPF carrier sample, so that the test and the adjustment before formal coating of the SCR slurry are more efficient.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine exhaust gas treatment, and in particular to an auxiliary device for coating SDPF catalyst. Background Technology

[0002] In diesel engine exhaust aftertreatment systems, the combined use of SCR technology and DPF systems is widely applied to reduce harmful gas emissions. SCR catalyst slurry coating is a key process. DPF carriers have high porosity and strong water absorption, making it easy for SCR catalyst slurry to become clogged, resulting in insufficient coating height or even carrier breakage when directly coated onto the DPF carrier. Therefore, in the early stages of SCR catalyst slurry coating onto DPF carriers, numerous coating experiments are required to confirm the process's feasibility. However, directly coating with different slurry formulations each time leads to significant waste of both SCR slurry and DPF carrier. For example, patent CN107866364A, "A Coating Process for DPF Catalyst for Particulate Removal in Diesel Exhaust Gas Purification," discloses a coating process that directly coats the DPF carrier. Therefore, during the coating process development, testing the water retention and flowability of different SCR slurries on small-scale DPF carrier samples can effectively reduce these problems, accelerate process development, and shorten development time.

[0003] In summary, there is a need for an auxiliary device that can test the water retention and flowability of SCR slurries from different processes on a small sample of DPF carrier. Utility Model Content

[0004] To address the aforementioned issues, this invention provides an auxiliary device for coating SDPF catalysts, which can test the flowability and water retention of SCR slurries from different processes on a small DPF carrier sample, effectively making the testing and adjustment of SCR slurries before formal coating more efficient.

[0005] The auxiliary device for coating SDPF catalyst provided by this utility model includes a fixing mechanism, which includes an inclined fixing seat with a fixing groove suitable for loading DPF carrier samples. A reading scale is provided on the outer surface of the fixing seat. The extending direction of the fixing groove and the reading scale is consistent with the fixing seat. It also includes a liquid addition mechanism for adding SCR slurry to the DPF carrier samples, which is located above the fixing seat and is used to add liquid to the highest point of the DPF carrier samples. It also includes an infrared moisture meter, which is located above the fixing seat and is used to detect the area of ​​the SDPF catalyst covered by the SCR slurry.

[0006] In one feasible embodiment, an angle adjustment mechanism is further included, the angle adjustment mechanism comprising a vertical pole and a support rod detachably connected to the vertical pole, the support rod being connected to the bottom of a fixed long seat; the included angle α between the vertical pole and the fixed long seat is ≤90°.

[0007] In one feasible embodiment, the upright is provided with a plurality of first adjustment holes arranged sequentially along the extension direction of the upright, and the support rod is provided with a plurality of second adjustment holes arranged sequentially along the extension direction of the support rod; the first adjustment holes and the second adjustment holes are connected by adjustment screws.

[0008] In one feasible embodiment, the liquid adding mechanism includes a funnel and a discharge pipe located at the bottom of the funnel and communicating with the inside of the funnel, the funnel being connected to a vertical rod; the discharge pipe is also provided with a valve body.

[0009] In one feasible embodiment, the extension rod is provided with a plurality of third adjustment holes arranged sequentially along the extension direction of the extension rod, and the third adjustment holes and the first adjustment holes are connected by adjustment screws.

[0010] In one feasible embodiment, the upright is further provided with an extension rod that is detachably connected to the upright, and the extension rod is provided with a clamping member that is detachably connected to the funnel.

[0011] In one feasible embodiment, the fixing groove is further provided with a slide rail extending perpendicular to the fixing groove, and the slide rail is provided with two clamping blocks that can be slidably connected thereto, and the SDPF catalyst is disposed between the two clamping blocks.

[0012] In one feasible embodiment, a stress spring is also provided between the two clamping blocks.

[0013] In one feasible embodiment, the included angle between the upright and the fixed base is 30°≤α≤60°

[0014] In one feasible embodiment, a base plate is also included, and both the fixing mechanism and the angle adjustment mechanism are disposed on the base plate.

[0015] The auxiliary device for coating SDPF catalyst provided by this utility model has the following beneficial effects: 1) It can test the flowability and water retention of SCR slurries of different processes on a small sample of DPF carrier, which can effectively make the testing and adjustment of SCR slurry before formal coating more efficient; 2) The structure is relatively simple and easy to operate, which can speed up the progress of process development and shorten the process development time; 3) It can avoid the waste of slurry and carrier caused by directly coating the slurry onto the carrier. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a structural diagram of the fixed long seat, fixed groove, slide rail and slider of this utility model.

[0018] Figure Labels

[0019] Fixed mechanism 1

[0020] Fixed long seat 11

[0021] Fixing slot 12

[0022] Slide rail 12.1

[0023] Clamping block 12.2

[0024] Reading ruler 2

[0025] Liquid dispensing mechanism 3

[0026] Funnel 31

[0027] Discharge pipe 32

[0028] Valve body 32.1

[0029] Infrared Moisture Analyzer 4

[0030] Angle adjustment mechanism 5

[0031] pole 51

[0032] First adjustment hole 51.1

[0033] Support rod 52

[0034] Second adjustment hole 52.1

[0035] Extension bar 53

[0036] Third adjustment hole 53.1

[0037] Clamping component 54

[0038] Fixing screw 55

[0039] Base plate 6 Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the terms "left side", "right side", "upper side", "lower side", "above", "below", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] This utility model provides an auxiliary device for coating SDPF catalysts, see reference. Figure 1 The system includes a fixing mechanism 1, which comprises an inclined fixing seat 11. The fixing seat 11 has a fixing groove 12 suitable for loading a DPF carrier sample. A reading scale 2 is provided on the outer surface of the fixing seat 11. The extending directions of the fixing groove 12 and the reading scale 2 are consistent with those of the fixing seat 11. It also includes a liquid addition mechanism 3 for adding SCR slurry to the DPF carrier sample. The liquid addition mechanism 3 is located above the fixing seat 11 and is used to add liquid to the highest point of the DPF carrier sample. Here, "highest point" refers to: [See reference]. Figure 1Because the fixed long seat 11 has a certain tilt angle, the DPF carrier sample placed in the fixed groove 12 also has a certain tilt angle. The highest point here refers to the end of the DPF carrier sample that is tilted upwards. An infrared moisture analyzer 4 is also included. The infrared moisture analyzer 4 is located above the fixed long seat 11. The infrared moisture analyzer 4 is used to detect the area of ​​the SDPF catalyst covered by the SCR slurry. Here, "area covered by SCR slurry" refers to areas where the SCR slurry has a high solids content and may not be able to flow completely through the entire DPF carrier sample, resulting in some parts of the DPF carrier sample not being covered by the SCR slurry. If the infrared moisture analyzer 4 detects an area not covered by the SCR slurry or a partially covered area, it will have a significant impact on the results. Therefore, the infrared moisture analyzer 4 must detect the area of ​​the DPF carrier sample completely covered by the SCR slurry. For illustration, the infrared moisture meter 4 is used to detect the water retention of the SCR slurry on the DPF carrier sample, and the reading scale 2 is used to detect the flowability of the SCR slurry on the DPF carrier sample. Typically, the reading scale 2 is marked with graduations, the smallest unit being mm and the largest unit being cm. When using the auxiliary device for coating DPF carrier samples provided by this invention, the SCR slurry to be tested is pre-loaded into the liquid addition mechanism 3, then the DPF carrier sample is placed in the fixed tank 12. Liquid is then added from the highest point of the DPF carrier sample through the liquid addition mechanism 3, and the flowability of the SCR slurry is observed and recorded through the reading scale 2. The water retention of the SCR slurry is observed and recorded through the infrared moisture meter 4. This invention 1) enables the testing of the flowability and water retention of SCR slurries using different processes on DPF carrier samples, effectively making the testing and adjustment of SCR slurry before formal coating more efficient; 2) has a relatively simple structure, is easy to operate, and can accelerate the progress of process development and shorten the process development time; 3) avoids the waste of slurry and carrier caused by directly coating the slurry onto the carrier.

[0044] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 1It also includes an angle adjustment mechanism 5, which includes a vertical rod 51 and a support rod 52 detachably connected to the vertical rod 51. The support rod 52 is connected to the bottom of the fixed long seat 11. The included angle α between the vertical rod 51 and the fixed long seat 11 is ≤90°, preferably 30°≤α≤60°. As an explanation, when testing the same batch of SCR slurry using this device, the angle between the upright 51 and the fixed long seat 11 should remain consistent. Generally, when the solid content of the same batch of SCR slurry is high, the angle between the upright 51 and the fixed long seat 11 can be reduced, increasing the tilt angle between the fixed long seat 11 and the horizontal plane. This can enhance the effect of gravity on the SCR slurry and accelerate its flow rate. Conversely, when the solid content of the same batch of SCR slurry is low, the angle between the upright 51 and the fixed long seat 11 can be increased, decreasing the tilt angle between the fixed long seat 11 and the horizontal plane. This can reduce the effect of gravity on the SCR slurry and slow down its flow rate.

[0045] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 1 The upright 51 has multiple first adjustment holes 51.1 arranged sequentially along its extension direction, and the support rod 52 has multiple second adjustment holes 52.1 arranged sequentially along its extension direction. The first adjustment holes 51.1 and the second adjustment holes 52.1 are connected by adjusting screws. After adjusting the angle α between the upright 51 and the fixed base 11, the fixing screws 55 are passed through the two closest first adjustment holes 51.1 and second adjustment holes 52.1 respectively, thus completing the fixation between the upright 51 and the fixed base 11.

[0046] In one specific embodiment, the connection point between the support rod 52 and the fixed long seat 11 is located in the middle of the fixed long seat 11, and the angle between the support rod 52 and the fixed long seat 11 is fixed at 90°. The shape formed by the support rod 52 and the fixed long seat 11 is similar to a T-shape. When adjusting the tilt of the fixed long seat 11, the support rod 52 can be rotated directly for adjustment. After rotation, the first adjustment hole 51.1 and the second adjustment hole 52.1 can be locked by adjusting screws. In some cases, when the tilt of the fixed long seat 11 is large, that is, when the included angle α is small, the height of the fixed long seat 11 in the vertical direction will increase relatively. At this time, the support rod 52 can be moved upward so that the second adjustment hole 52.1 is fitted with the first adjustment hole 51.1, which is higher on the upright 51, and vice versa.

[0047] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 1The liquid addition mechanism 3 includes a funnel 31 and a discharge pipe 32 located at the bottom of the funnel 31 and communicating with the inside of the funnel 31. The funnel 31 is connected to the upright 51. The discharge pipe 32 is also equipped with a valve body 32.1. When in use, the SCR slurry in the funnel 31 can flow along the storage pipe 33 to the DPF carrier sample by opening or closing the valve body 32.1. As a supplementary note, the amount of SCR slurry added to the DPF carrier sample in the same batch of experiments usually needs to be kept consistent. Therefore, the duration of the valve body 32.1 being open can be specified during liquid addition, for example, 3 to 5 seconds.

[0048] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 1 The extension rod 53 is provided with a plurality of third adjustment holes 53.1 arranged sequentially along the extension direction of the extension rod 53. The third adjustment holes 53.1 and the first adjustment holes 51.1 are connected by adjustment screws. After adjusting the included angle α between the upright rod 51 and the fixed long seat 11, the positional relationship between the extension rod 53 and the upright rod 51 can be adjusted according to the highest point of the DPF carrier sample so that the liquid outlet of the discharge pipe 32 can be aligned with the highest point of the DPF carrier sample.

[0049] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 1 The upright 51 is also provided with an extension rod 53 that is detachably connected to the upright 51. The extension rod 53 is provided with a clamping member 54, which is detachably connected to the funnel 31.

[0050] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 2 The fixing groove 12 is further provided with a slide rail 12.1 extending perpendicularly to the fixing groove 12. The slide rail 12.1 is provided with two clamping blocks 12.2 slidably connected to it, and the DPF carrier sample is disposed between the two clamping blocks 12.2. Generally speaking, the DPF carrier samples are of different sizes, and the width of the fixing groove 12 is usually larger than the widest DPF carrier sample. Therefore, when a smaller DPF carrier sample is placed in the fixing groove 12, it is inevitable that displacement will occur due to insufficient resistance or excessive tilt angle. The clamping blocks 12.2 can hold DPF carrier samples of different widths to prevent displacement.

[0051] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 2 A stress spring (not shown in the figure) is also provided between the two clamping blocks 12.2. The elastic force of the stress spring can further enhance the clamping force of the two clamping blocks 12.2, thereby improving the fixation ability of the DPF carrier sample.

[0052] In the auxiliary device for SDPF catalyst coating provided in this embodiment of the utility model, see [reference needed]. Figure 1 It also includes a base plate 6, and the fixing mechanism 1 and the angle adjustment mechanism 5 are both located on the base plate 6.

[0053] Example 1

[0054] Corning DPF was used to prepare a carrier sample 3cm wide, 10cm long, and 1cm high; the angle α between the upright 51 and the fixed base 11 was adjusted to 45°. The two SCR slurries were tested separately, and the results are as follows:

[0055] SCR slurry No. 1 has a flowability of 4 cm and a water retention of 20%.

[0056] The No. 2 SCR slurry has a flowability of 6cm and a water retention of 30%.

[0057] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An auxiliary device for coating SDPF catalyst, characterized in that: The device includes a fixing mechanism (1), which includes an inclined fixing seat (11). The fixing seat (11) has a fixing groove (12) suitable for loading a DPF carrier sample. A reading scale (2) is provided on the outer surface of the fixing seat (11). The extending directions of the fixing groove (12) and the reading scale (2) are consistent with those of the fixing seat (11). It also includes a liquid addition mechanism (3) for adding SCR slurry to the DPF carrier sample, the liquid addition mechanism (3) being located above the fixed long seat (11), the liquid addition mechanism (3) being used to add liquid to the highest point of the DPF carrier sample; It also includes an infrared moisture meter (4), which is located above the fixed long seat (11) and is used to detect the area of ​​the SDPF catalyst covered by the SCR slurry.

2. The auxiliary device for coating SDPF catalyst according to claim 1, characterized in that: It also includes an angle adjustment mechanism (5), which includes a pole (51) and a support rod (52) detachably connected to the pole (51). The support rod (52) is connected to the bottom of the fixed long seat (11). The included angle α between the pole (51) and the fixed long seat (11) is ≤90°.

3. The auxiliary device for coating SDPF catalyst according to claim 2, characterized in that: The upright (51) is provided with a plurality of first adjustment holes (51.1) arranged sequentially along the extension direction of the upright (51), and the support rod (52) is provided with a plurality of second adjustment holes (52.1) arranged sequentially along the extension direction of the support rod (52); the first adjustment holes (51.1) and the second adjustment holes (52.1) are connected by adjustment screws.

4. The auxiliary device for coating SDPF catalyst according to claim 3, characterized in that: The liquid adding mechanism (3) includes a funnel (31) and a discharge pipe (32) located at the bottom of the funnel (31) and communicating with the inside of the funnel (31). The funnel (31) is connected to the upright (51). The discharge pipe (32) is also provided with a valve body (32.1).

5. The auxiliary device for coating SDPF catalyst according to claim 4, characterized in that: The upright (51) is also provided with an extension rod (53) that is detachably connected to the upright (51). The extension rod (53) is provided with a clamping member (54), which is detachably connected to the funnel (31).

6. The auxiliary device for coating SDPF catalyst according to claim 5, characterized in that: The extension rod (53) is provided with a plurality of third adjustment holes (53.1) arranged sequentially along the extension direction of the extension rod (53), and the third adjustment holes (53.1) and the first adjustment holes (51.1) are connected by adjustment screws.

7. The auxiliary device for coating SDPF catalyst according to any one of claims 1 to 3, characterized in that: The fixed groove (12) is also provided with a slide rail (12.1) whose extension direction is perpendicular to the fixed groove (12). The slide rail (12.1) is provided with two clamping blocks (12.2) that can be slidably connected to it. The SDPF catalyst is located between the two clamping blocks (12.2).

8. The auxiliary device for coating SDPF catalyst according to claim 7, characterized in that: A stress spring is also provided between the two clamping blocks (12.2).

9. The auxiliary device for coating SDPF catalyst according to claim 2 or 3, characterized in that: The included angle between the upright (51) and the fixed long seat (11) is 30°≤α≤60°.

10. The auxiliary device for coating SDPF catalyst according to claim 2, characterized in that: It also includes a base plate (6), and the fixing mechanism (1) and the angle adjustment mechanism (5) are both located on the base plate (6).

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