A test method for the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst

Abstract

This invention relates to the field of catalyst packaging iron box technology, specifically to a method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst. The method includes: collecting basic information on the packaging of the honeycomb SCR denitrification catalyst module; based on the collected information, placing cushioning material and catalyst modules inside the iron box, ensuring the compression rate of the cushioning material reaches a set value; using a pre-tightening force detection device to detect preset force detection points inside the iron box, the device including a digital push-pull force gauge and a measuring induction probe, the measuring induction probe being connected to the digital push-pull force gauge and the preset force detection points inside the iron box; converting the pressure values ​​measured at the preset force detection points into pressure values, and comparing them with the maximum compressive strength of the catalyst module at the corresponding point; determining whether the current cushioning material and packaging method meet the standard requirements based on the comparison result. This method can provide technical support for the rational packaging of iron boxes.

Description

Technical Field

[0001] This invention relates to the field of catalyst packaging iron box technology, specifically to a method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst. Background Technology

[0002] Nitrogen oxides (NOx) are among the major air pollutants. Their emissions cause acid rain, photochemical smog, ozone layer depletion, and many other environmental problems, posing a significant threat to human health. my country has abundant coal reserves, which constitute a large share of its energy consumption structure. Coal resources are primarily used for thermal power generation. Data from the "China Statistical Yearbook 2020" shows that China consumed a total of 2.86 billion tons of standard coal equivalent in 2006, which increased to 4.87 billion tons of standard coal equivalent by 2019. From 2006 to 2019, coal remained the dominant energy source, consistently accounting for over 55% of total energy consumption. my country's energy structure dictates that the installed capacity of coal-fired power plants will continue to grow for a considerable period, leading to further increases in NOx emissions from coal-fired boilers. If this is not effectively controlled, it will directly impact my country's air quality and the sustainable development of the coal-fired industry.

[0003] In the field of NOx control technology, selective catalytic reduction (SCR) has been widely used due to its high reliability, lack of byproducts, and simple system equipment. Currently, in domestic coal-fired power plant boiler flue gas denitrification systems, the most widely used catalysts are metal oxide catalysts that use anatase titanium dioxide as a carrier to support vanadium oxide as the active material, supplemented by tungsten oxide or molybdenum oxide as co-catalysts. However, current honeycomb SCR denitrification catalysts are mainly packaged in iron boxes. During transportation and installation, catalyst modules frequently experience damage and displacement, directly increasing after-sales costs for catalyst module manufacturers and damaging brand image. The main reason for catalyst module damage is the loose internal packaging. Therefore, this invention aims to solve this common problem for both catalyst module suppliers and users by providing a method for testing the pre-tightening force inside the iron box packaging of honeycomb SCR denitrification catalysts, thus providing technical support and guidance for more reasonable catalyst iron box packaging. Summary of the Invention

[0004] To address the problem in existing technologies where catalyst modules inside iron boxes are not tightly packaged, leading to displacement and damage during transportation and installation, this invention provides a method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst. This method ensures the tightness of the packaging without damaging the catalyst module, thereby improving the economic and brand benefits for catalyst module manufacturers.

[0005] To achieve the above objectives, this invention provides a method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst, the method comprising the following steps:

[0006] S1. Basic information on the packaging project of honeycomb SCR denitrification catalyst modules;

[0007] S2. Based on the statistical basic information, place the buffer material and the catalyst module inside the iron box, and make the compression rate of the buffer material reach the set value;

[0008] S3. A pre-tightening force detection device is used to detect the preset force detection points inside the iron box. The pre-tightening force detection device includes a digital display push-pull force gauge and a measuring induction probe. The non-detection end of the measuring induction probe is detachably connected to the digital display push-pull force gauge, and the detection end is connected to the preset force detection points inside the iron box.

[0009] S4. Convert the pressure value measured at the preset stress detection point into a pressure value, and compare it with the maximum compressive strength value of the catalyst module at the corresponding point. Based on the comparison result, determine whether the current buffer material and packaging method meet the standard requirements.

[0010] Preferably, the basic information includes the dimensions of the iron box, the dimensions of the catalyst module, and the dimensions of the buffer material.

[0011] Preferably, the dimensions of the cushioning material include the dimensions of the cushioning material in the vertical direction and the dimensions of the cushioning material in the horizontal direction.

[0012] Preferably, the cushioning material is a fiber blanket and fiber paper;

[0013] Preferably, the fiber blanket and the fiber paper are made of aluminum carbonate.

[0014] Preferably, in step S2, the step of bringing the compression ratio of the buffer material to a set value specifically includes:

[0015] This allows the compression ratio of the buffer material to reach 25-35%.

[0016] Preferably, the compression ratio of the buffer material reaches 30%.

[0017] Preferably, the preset stress detection points include stress detection points in the vertical direction between the catalyst module units, stress detection points in the horizontal direction between the catalyst module units, stress detection points at the connection of the top plate of the catalyst module, stress detection points at the connection of the bottom plate of the catalyst module, and stress detection points at the connection of the two side plates of the catalyst module.

[0018] Preferably, the area of ​​the preset force detection point is 1-100 square centimeters;

[0019] Preferably, the area of ​​the preset force detection point is 10-20 square centimeters.

[0020] Preferably, the measuring sensing probe is an S-shaped sensor head, a convex point sensor head, or a planar sensor head;

[0021] Preferably, the measuring sensor probe is a planar sensor head.

[0022] Preferably, the diameter of the detection end of the measuring sensor probe is 0-100 mm;

[0023] Preferably, the diameter of the detection end of the measuring sensor probe is 0-50 mm;

[0024] More preferably, the diameter of the detection end of the measuring sensor probe is 0-25 mm.

[0025] Preferably, the measurement range of the digital push-pull force gauge is 0-2000N;

[0026] Preferably, the measurement range of the digital push-pull force gauge is 0-1000N;

[0027] More preferably, the measurement range of the digital push-pull force gauge is 0-300N.

[0028] According to the above technical solution, the pre-tightening force test method for the packaging iron box of the honeycomb SCR denitrification catalyst can quickly and accurately detect the pressure at various positions of the catalyst module inside the iron box in practical applications. This allows for the scientific and reasonable optimization of the iron box packaging plan of the catalyst module manufacturer, preventing displacement or damage to the catalyst module during transportation and installation. In this way, the packaging tightness can be ensured while preventing damage to the catalyst module. Attached Figure Description

[0029] Figure 1 This is a flowchart of the test method for the pre-tightening force inside the packaging iron box of honeycomb SCR denitrification catalyst;

[0030] Figure 2 This is a schematic diagram of the force detection points in the vertical and horizontal directions between the catalyst module monomers in Example 1. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0032] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of indicated technical features. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean a non-exclusive inclusion, the possibility of the presence or addition of one or more other features, units, components, and / or combinations thereof.

[0033] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] This invention provides a method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst, such as... Figure 1-2 As shown, the method includes the following steps:

[0035] S1. Basic information on the packaging project of honeycomb SCR denitrification catalyst modules;

[0036] S2. Based on the statistical basic information, place the buffer material and the catalyst module inside the iron box, and make the compression rate of the buffer material reach the set value;

[0037] S3. A pre-tightening force detection device is used to detect the preset force detection points inside the iron box. The pre-tightening force detection device includes a digital display push-pull force gauge and a measuring induction probe. The non-detection end of the measuring induction probe is detachably connected to the digital display push-pull force gauge, and the detection end is connected to the preset force detection points inside the iron box.

[0038] S4. Convert the pressure value measured at the preset stress detection point into a pressure value, and compare it with the maximum compressive strength value of the catalyst module at the corresponding point. Based on the comparison result, determine whether the current buffer material and packaging method meet the standard requirements.

[0039] According to the above technical solution, the pre-tightening force test method for the packaging iron box of the honeycomb SCR denitrification catalyst can quickly and accurately detect the pressure at various positions of the catalyst module inside the iron box in practical applications. This allows for the scientific and reasonable optimization of the iron box packaging plan of the catalyst module manufacturer, preventing displacement or damage to the catalyst module during transportation and installation. In this way, the packaging tightness can be ensured while preventing damage to the catalyst module.

[0040] The present invention discloses a method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst. The basic information includes the dimensions of the iron box, the catalyst module, and the cushioning material. Therefore, in practical applications, a reasonable packaging plan can be formulated by comprehensively analyzing the dimensions of the iron box, the catalyst module, and the cushioning material. In a specific embodiment, the dimensions of the cushioning material include both vertical and horizontal dimensions. In a more specific embodiment, the cushioning material is a fiber blanket and fiber paper. Preferably, the fiber blanket and fiber paper are made of aluminum carbonate. This allows for the selection of appropriate vertical and horizontal cushioning material dimensions based on the dimensions of the iron box and the average cross-sectional width of the catalyst module for packaging.

[0041] The method for testing the pre-tightening force inside the iron box of the honeycomb SCR denitrification catalyst of the present invention, in step S2, the step of making the compression rate of the buffer material reach a set value specifically includes making the compression rate of the buffer material reach 25-35%; most preferably, the compression rate of the buffer material reaches 30%, thereby obtaining the most suitable compression rate of the buffer material and the packaging method under the premise of ensuring that the packaging tightness meets the requirements and does not damage the catalyst module, thereby optimizing packaging efficiency and saving packaging costs.

[0042] The pre-tightening force testing method for the packaging iron box of the honeycomb SCR denitrification catalyst of the present invention includes preset force detection points, which include force detection points in the vertical direction between catalyst module units, force detection points in the horizontal direction between catalyst module units, force detection points at the connection of the top plate of the catalyst module, force detection points at the connection of the bottom plate of the catalyst module, and force detection points at the connection of the two side plates of the catalyst module. By using a pre-tightening force detection device to detect multiple preset force detection points in the iron box, and comparing them with the maximum compressive strength value of the catalyst module at the corresponding points, it is possible to determine whether the current cushioning material and packaging method meet the standard requirements based on the comparison results.

[0043] In a specific embodiment, the area of ​​any one of the preset force detection points is 1-100 square centimeters, preferably 10-20 square centimeters, to facilitate detection by the detection end of the measuring sensor probe. The position and number of the preset force detection points can be selected according to actual needs and are not limited here. In a more specific embodiment, the measuring sensor probe is an S-shaped sensor head, a convex point sensor head, or a planar sensor head, preferably a planar sensor head, to facilitate detection at the preset force detection points. In another more specific embodiment, the diameter of the detection end of the measuring sensor probe is 0-100 mm; preferably, the diameter is 0-50 mm; more preferably, the diameter is 0-25 mm, further facilitating detection of the preset force detection points by the measuring sensor probe.

[0044] The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst of the present invention uses a digital push-pull force gauge with a measurement range of 0-2000N. Preferably, the measurement range of the digital push-pull force gauge is 0-1000N, and more preferably, the measurement range of the digital push-pull force gauge is 0-300N. This allows the measurement range of the digital push-pull force gauge to match the maximum value of the pressure measured at the preset force detection point, thereby improving the measurement accuracy.

[0045] The present invention will be described in detail below through embodiments, but the scope of protection of the present invention is not limited thereto.

[0046] Example 1

[0047] Taking a honeycomb SCR denitrification catalyst module packaging project of a chemical company as an example

[0048] like Figure 1-2 As shown, the method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst is implemented. The method includes the following steps:

[0049] S1. Basic information on the packaging project of honeycomb SCR denitrification catalyst modules;

[0050] S2. Based on the statistical basic information, place the buffer material and the catalyst module inside the iron box, and make the compression rate of the buffer material reach the set value;

[0051] S3. A pre-tightening force detection device is used to detect the preset force detection points inside the iron box. The pre-tightening force detection device includes a digital display push-pull force gauge and a measuring induction probe. The non-detection end of the measuring induction probe is detachably connected to the digital display push-pull force gauge, and the detection end is connected to the preset force detection points inside the iron box.

[0052] S4. Convert the pressure value measured at the preset stress detection point into a pressure value, and compare it with the maximum compressive strength value of the catalyst module at the corresponding point. Based on the comparison result, determine whether the current buffer material and packaging method meet the standard requirements.

[0053] Specifically, the basic information is as follows: the dimensions of the iron box are 1906mm × 966mm × 1020mm; the average width of the catalyst module's cross-section is 148.11mm; the cushioning material is aluminum silicate fiber paper, with vertical dimensions of 150mm long, 50mm wide, and 80mm thick, and horizontal dimensions of 920mm wide, 50mm thick, and 80mm thick. Based on this basic information, the fiber paper and the catalyst module are placed inside the iron box, and the compression rate of the fiber paper reaches 30%. More specifically, such as... Figure 2 As shown, to ensure that the fiber paper compression rate reaches 30%, based on the above-mentioned dimensions of the catalyst module and the iron box, a total of 32 pieces of fiber paper are used when the catalyst module is stacked horizontally, and a total of 12 pieces of fiber paper are used when the catalyst module is stacked vertically, for a total of 120 pieces of fiber paper.

[0054] The preset force detection points include force detection points in the vertical direction between the catalyst module units and force detection points in the horizontal direction between the catalyst module units. The area of ​​the preset force detection points is 15 square centimeters. The measuring induction probe is a planar induction head with a detection end diameter of 10 mm. The measurement range of the digital push-pull force gauge is 300 N.

[0055] The test results are shown in Tables 1 and 2 below.

[0056] Table 1: Pressure between monomers in the horizontal direction inside the catalyst module

[0057] Location Pressure value (N) Pressure (MPa) Vertical first layer of fiber paper 154.7 0.32 Vertical second layer of fiber paper 178.2 0.36 The third layer of fiber paper in the vertical direction 183.5 0.37 4th layer of fiber paper in the vertical direction 198.1 0.40 5th layer of fiber paper in the vertical direction 221.3 0.45

[0058] Table 2: Pressure between monomers in the vertical direction inside the catalyst module

[0059] Location Pressure value (N) Pressure (MPa) Horizontal first layer of fiber paper 245.40 0.50 Second layer of fiber paper in the horizontal direction 266.10 0.54 Horizontal third layer of fiber paper 221.70 0.45 Horizontal fourth layer of fiber paper 184.00 0.38 Horizontal fifth layer of fiber paper 261.90 0.53

[0060] Further compare the data in Tables 1 and 2 with Table 3 below.

[0061] Table 3: Compressive strength of catalyst module

[0062]

[0063] As shown in Tables 1 and 2 above, after the catalyst module is tightened, the pressure range between the individual catalyst module units is 154.7N-266.1N, corresponding to a pressure range of 0.32MPa to 0.54MPa. Combined with the radial compression resistance standard for the catalyst module and the axial and radial compression resistance test data obtained in the laboratory (Table 3), it can be seen that the pressure between the catalyst module units is within the compression resistance range. This indicates that the current cushioning material (i.e., fiber paper) and packaging method meet the standard requirements and can effectively ensure that the catalyst module will not be damaged during transportation and installation. Furthermore, based on the test method described in this invention, the packaging methods of different cushioning materials under different compression rates can be further tested to determine the most suitable cushioning material packaging compression rate and packaging method, thereby optimizing packaging efficiency and saving packaging costs.

[0064] The pre-tightening force test method inside the packaging iron box of the honeycomb SCR denitrification catalyst provided by this invention can quickly and accurately detect the pressure at various positions of the catalyst module inside the iron box in practical applications. This allows for the scientific and reasonable optimization of the iron box packaging plan of catalyst module manufacturers, preventing displacement or damage to the catalyst module during transportation and installation. In this way, the packaging tightness is ensured while preventing damage to the catalyst module.

[0065] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A method for testing the pre-tightening force inside the packaging iron box of a honeycomb SCR denitrification catalyst, characterized in that, The method includes the following steps: S1. Basic information on the packaging project of honeycomb SCR denitrification catalyst modules; S2. Based on the statistical basic information, place the buffer material and the catalyst module inside the iron box, and make the compression rate of the buffer material reach the set value; S3. A pre-tightening force detection device is used to detect the preset force detection points inside the iron box. The pre-tightening force detection device includes a digital display push-pull force gauge and a measuring induction probe. The non-detection end of the measuring induction probe is detachably connected to the digital display push-pull force gauge, and the detection end is connected to the preset force detection points inside the iron box. S4. Convert the pressure value measured at the preset stress detection point into a pressure value, and compare it with the maximum compressive strength value of the catalyst module at the corresponding point. Based on the comparison result, determine whether the current buffer material and packaging method meet the standard requirements.

2. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 1, characterized in that, The basic information includes the dimensions of the iron box, the dimensions of the catalyst module, and the dimensions of the buffer material.

3. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 2, characterized in that, The dimensions of the cushioning material include the dimensions of the cushioning material in the vertical direction and the dimensions of the cushioning material in the horizontal direction.

4. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 2, characterized in that, The cushioning materials are fiber blankets and fiber paper.

5. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 4, characterized in that, The fiber blanket and the fiber paper are made of aluminum carbonate.

6. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 1, characterized in that, In step S2, the step of bringing the compression ratio of the buffer material to a set value specifically includes: This allows the compression ratio of the buffer material to reach 25-35%.

7. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 6, characterized in that, This allows the compression ratio of the buffer material to reach 30%.

8. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 1, characterized in that, The preset stress detection points include stress detection points in the vertical direction between catalyst module units, stress detection points in the horizontal direction between catalyst module units, stress detection points at the connection of the top plate of the catalyst module, stress detection points at the connection of the bottom plate of the catalyst module, and stress detection points at the connection of the two side plates of the catalyst module.

9. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 1 or 8, characterized in that, The area of ​​the preset force detection point is 1-100 square centimeters.

10. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 9, characterized in that, The area of ​​the preset force detection point is 10-20 square centimeters.

11. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitration catalyst according to claim 1, characterized in that, The measurement sensing probe includes an S-shaped sensor head, a convex point sensor head, and a planar sensor head.

12. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 11, characterized in that, The measuring sensor probe is a planar sensor head.

13. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitration catalyst according to claim 1 or 11, characterized in that, The diameter of the detection end of the measuring sensor probe is 0-100mm.

14. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 13, characterized in that, The diameter of the detection end of the measuring sensor probe is 0-50mm.

15. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 14, characterized in that, The diameter of the detection end of the measuring sensor probe is 0-25mm.

16. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitration catalyst according to claim 1, characterized in that, The measurement range of the digital push-pull force gauge is 0-2000N.

17. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 16, characterized in that, The measurement range of the digital push-pull force gauge is 0-1000N.

18. The method for testing the pre-tightening force inside the packaging iron box of the honeycomb SCR denitrification catalyst according to claim 17, characterized in that, The measurement range of the digital push-pull force gauge is 0-300N.

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