Coke oven flue gas denitration catalyst sampling device
By designing a sampling spoon with an impact cone, efficient and safe sampling of coke oven flue gas denitrification catalyst was achieved, solving the safety risks and production efficiency problems in the sampling process and avoiding downtime.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SHIHENG SPECIAL STEEL GROUP
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-26
AI Technical Summary
The sampling process for denitrification catalysts in coke ovens is time-consuming and poses safety risks. Furthermore, it is difficult to coordinate the process of stopping the machine for sampling with continuous, stable, and environmentally friendly production.
A sampling device for denitrification catalyst of coke oven flue gas is designed. It adopts an impact cone structure inside the spoon body. The catalyst is crushed by the impact cone without entering the reactor, so as to achieve the sampling of the catalyst and avoid human entry into the high temperature and harmful environment.
It achieves efficient and safe catalyst sampling, reduces safety risks, saves time, and resolves the contradiction between shutdown sampling and stable and environmentally friendly production.
Smart Images
Figure CN224286421U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of catalyst sampling technology, specifically to a sampling device for denitrification catalysts in coke oven flue gas. Background Technology
[0002] In modern industrial production, coke ovens are a crucial link in industries such as iron and steel smelting. The flue gas they produce contains large amounts of nitrogen oxides, posing a significant threat to the environment. To effectively control pollution, coke oven flue gas denitrification reactors play a vital role, and the denitrification catalyst within them is the core component that determines denitrification efficiency.
[0003] As denitrification catalysts approach the end of their lifespan, their activity gradually declines. To ensure the stable and efficient operation of the denitrification system and meet increasingly stringent environmental emission standards, accurately assessing the actual performance of the catalyst becomes essential. This necessitates sampling the catalyst and then conducting in-depth analysis of its activity using professional testing methods. This analysis serves as a crucial basis for determining whether new catalyst needs to be added to enhance denitrification capacity or whether a complete catalyst replacement is necessary.
[0004] Because the coke oven flue gas reaches approximately 300°C, it needs to be shut down to cool to below 60°C and ventilated. Only after the concentration of harmful gases inside the coke oven has decreased to a level that meets safety standards can workers enter the denitrification reactor through manholes to sample the catalyst. The entire sampling process is not only time-consuming but also poses safety risks. Furthermore, under environmental protection requirements, enterprises must ensure that pollutant emissions meet standards at all times. The significant time spent on shutdown sampling conflicts with the need for continuous and stable environmentally friendly production, often making coordination difficult. Utility Model Content
[0005] To address the challenges of time-consuming and safety-risk manual sampling processes for coke oven denitrification catalysts, which often conflict with the need for continuous, stable, and environmentally friendly production, this invention provides a coke oven flue gas denitrification catalyst sampling device.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A sampling device for denitrification catalyst of coke oven flue gas includes a sampling spoon, which includes a spoon body and a handle. The outer wall of the spoon body is connected to one end of the handle. An impact cone is provided inside the spoon body. The impact cone has a cone structure. The bottom end of the impact cone is connected to the inner bottom of the spoon body. The top end of the impact cone extends out of the spoon body.
[0008] By adopting the above structural scheme, this utility model sets an impact cone inside the sampling spoon body, with the top of the impact cone extending out of the spoon body. The sampling spoon is inserted into the denitrification reactor through the manhole. Without the staff entering the denitrification reactor, the catalyst can be crushed by the impact cone and fall into the spoon, thus achieving sampling. This avoids the staff entering the high temperature and harmful gas environment, reducing safety risks. At the same time, it eliminates the need for cumbersome operations such as shutdown for cooling and ventilation, saving time and resolving the contradiction between shutdown for sampling and continuous, stable, and environmentally friendly production.
[0009] As a preferred implementation method for a sampling device for denitrification catalysts in coke oven flue gas, the spoon body has a hemispherical or flat-bottomed bowl-shaped structure.
[0010] The above-mentioned structural design, with the spoon body designed as a hemispherical or flat-bottomed bowl shape, is conducive to collecting the pulverized catalyst. The hemispherical structure allows the catalyst to be more evenly gathered in the spoon, while the flat-bottomed bowl shape facilitates placement and operation, improving the efficiency and convenience of sampling.
[0011] As a preferred implementation of a sampling device for denitrification catalyst in coke oven flue gas, the impact cone is a triangular cone, and the bottom of the impact cone is welded to the inner wall of the spoon body.
[0012] The above structural design incorporates a triangular pyramidal structure with its bottom welded to the inner wall of the spoon. The sharp shape of the pyramid allows for more effective impact on the catalyst, making it easier to pulverize. The welded connection ensures a strong bond between the impact cone and the spoon, preventing loosening during repeated impacts and guaranteeing the stability and reliability of the sampling device. During the welding process, the bottom of the pyramid fuses with the inner wall of the spoon, achieving a sealed connection.
[0013] As a preferred implementation of a sampling device for denitrification catalyst of coke oven flue gas, the impact cone is a cone, the bottom of the impact cone is connected to the connecting part, the connecting part is a cylindrical structure, the outer diameter of the connecting part is equal to the outer diameter of the bottom end of the impact cone, the outer circumferential surface of the connecting part is provided with external threads, the bottom of the spoon body is provided with a connecting groove that matches the connecting part, the inner wall of the connecting groove is provided with internal threads, and the connecting groove is threadedly connected to the connecting part.
[0014] With the above structural design, the impact cone is a cone and is threadedly connected to the spoon body through a connecting part, which facilitates the installation and disassembly of the impact cone. When the impact cone is worn or damaged, it can be easily replaced.
[0015] As a preferred implementation method for a sampling device for denitrification catalysts in coke oven flue gas, the inner wall of the spoon body is provided with scale lines.
[0016] Using the above structural scheme, the amount of catalyst taken can be measured, which helps to accurately analyze the catalyst activity in the future.
[0017] As a preferred implementation of a sampling device for denitrification catalysts in coke oven flue gas, a guide groove is opened at the top edge of the scoop body.
[0018] With the above structural design, after the desulfurization catalyst is collected, the guide channel plays a guiding role when the catalyst is poured out, which facilitates the concentrated pouring out of the catalyst.
[0019] As a preferred implementation of a sampling device for denitrification catalysts in coke oven flue gas, the cross-section of the guide channel is an inverted triangle.
[0020] With the above structural design, the cross-section of the guide channel is an inverted triangle, which allows the catalyst to flow more smoothly down the guide channel.
[0021] As a preferred implementation of a sampling device for denitrification catalysts in coke oven flue gas, the impact cone is divided into a base and a tip, and the base and tip are detachably connected.
[0022] With the above structural design, the impact cone is divided into a base and a tip, which are detachably connected. When the tip is worn or damaged during the impact process, only the tip needs to be replaced, instead of replacing the entire impact cone, thus reducing costs.
[0023] As a preferred implementation of a sampling device for denitrification catalyst of coke oven flue gas, the top center of the base is connected to a stud, the stud is set vertically, and the bottom of the tip has a screw hole that can be threaded to the stud.
[0024] The above structural design achieves a detachable connection between the base and the tip through a threaded connection of studs and threaded holes. This method is simple, reliable, and easy to operate. When the tip needs to be replaced, simply unscrew the old tip and install the new one, which is convenient, quick, and ensures the normal use of the impact cone.
[0025] As a preferred implementation of a sampling device for denitrification catalyst of coke oven flue gas, the handle includes rod one and rod two. One end of rod one is connected to the outer wall of the spoon body, and the other end of rod one has a telescopic hole extending along the length of rod one. A limit hole is opened on the outer surface of rod one, and an internal thread is opened in the limit hole. The limit hole is threadedly connected to a flat-head screw, and rod two can be inserted into the telescopic hole.
[0026] The above-described structural design incorporates a telescopic mechanism with two levers, and is secured by a flat-head screw, allowing the handle length to be adjusted according to actual operational needs. In different operating spaces, the handle can be adjusted to a suitable length, facilitating operation and improving the flexibility and applicability of the sampling device.
[0027] The beneficial effects of this utility model include:
[0028] This invention designs a spoon-shaped sampling device with an impact cone extending from the top of the spoon body. This allows workers to sample the catalyst without entering the reactor, simply by inserting the sampling spoon into the denitrification reactor through the manhole. The impact cone strikes the catalyst, enabling catalyst crushing and sampling to be completed outside the high-temperature and harmful environment. This significantly reduces safety risks, saves time, and resolves the conflict between shutdown sampling and stable and environmentally friendly production. Attached Figure Description
[0029] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a three-dimensional structural schematic diagram of a coke oven flue gas denitrification catalyst sampling device in Example 1;
[0031] Figure 2 This is a three-dimensional structural schematic diagram of a coke oven flue gas denitrification catalyst sampling device in Example 2;
[0032] Figure 3 This is a schematic cross-sectional view of a coke oven flue gas denitrification catalyst sampling device in Example 2;
[0033] Figure 4 This is a three-dimensional structural schematic diagram of a coke oven flue gas denitrification catalyst sampling device in Example 3;
[0034] Figure 5 This is a schematic cross-sectional view of a coke oven flue gas denitrification catalyst sampling device in Example 3;
[0035] Figure 6 This is a cross-sectional structural diagram of the handle in Examples 1-3.
[0036] List of components and reference numerals:
[0037] 1. Sampling spoon; 11. Spoon body; 111. Flow guide groove; 112. Scale line; 12. Handle; 121. Rod one; 122. Rod two; 123. Telescopic hole; 124. Flat head screw;
[0038] 2. Impact cone; 21. Base; 22. Tip; 23. Stud;
[0039] 3. Connecting parts. Detailed Implementation
[0040] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0041] Example 1:
[0042] Reference Figure 1 and Figure 6 This embodiment proposes a sampling device for coke oven flue gas denitrification catalyst, including a sampling spoon 1. The sampling spoon 1 includes a spoon body 11 and a handle 12. The spoon body 11 is hemispherical, and the inner wall of the spoon body 11 is provided with scale lines 112. The outer wall of the spoon body 11 is connected to one end of the handle 12. An impact cone 2 is provided inside the spoon body 11. The impact cone 2 is a triangular cone. The bottom end of the impact cone 2 is welded to the inner wall of the spoon body 11, and the top end of the impact cone 2 extends out of the spoon body 11. A guide groove 111 is opened at the top edge of the spoon body 11. The cross-section of the guide groove 111 is an inverted triangle.
[0043] The handle 12 includes a first rod 121 and a second rod 122. One end of the first rod 121 is connected to the outer wall of the spoon body 11. The other end of the first rod 121 has a telescopic hole 123 extending along the length of the first rod 121. A limiting hole is opened on the outer surface of the first rod 121. An internal thread is opened in the limiting hole. The limiting hole is threadedly connected to a flat-head screw 124. The second rod 122 can be inserted into the telescopic hole 123.
[0044] In this embodiment, the spoon body 11 can also be configured as a flat-bottomed bowl-shaped structure.
[0045] In this embodiment, the handle 12 is a heat-resistant handle 12, and the following heat-resistant measures can be taken:
[0046] 1. The handle 12 is made of a material with low thermal conductivity, such as ceramic or glass fiber, which effectively prevents heat from being transferred from the part in contact with heat to the grip of the handle 12, reducing the heat felt by the hand.
[0047] 2. Design a heat insulation layer or air gap inside the handle 12. The heat insulation layer is usually made of materials with good heat insulation properties, such as rock wool or aluminum silicate fiber, to block heat conduction. The air gap utilizes the low thermal conductivity of air to form an insulating space, reducing the efficiency of heat transfer.
[0048] 3. The surface of the handle 12 is specially treated, such as by coating it with a heat-insulating coating, which can reflect heat radiation, reduce the heat absorbed by the handle 12, and also play a certain role in heat insulation.
[0049] Work process:
[0050] First, adjust the length of handle 12. Loosen the flat-head screw 124 in the limiting hole on the outer surface of rod 121. Adjust rod 2 122 within the telescopic hole 123 of rod 121. Once the appropriate length is reached, tighten the flat-head screw 124 to fix rod 2 122, ensuring that the length of handle 12 is suitable for operation requirements.
[0051] After adjusting the length of the handle 12, the operator holds the handle 12 and slowly inserts the sampling spoon 1, equipped with the impact cone 2, into the manhole of the denitrification reactor. Upon reaching the bottom of the upper catalyst layer, the operator swings and pulls the handle 12, repeatedly striking the bottom of the catalyst with the tip of the impact cone 2 to pulverize it. The pulverized catalyst particles, under the influence of gravity, slide down and accumulate along the inner wall of the hemispherical or flat-bottomed bowl-shaped spoon body 11. The sample volume is recorded by reading the scale line 112 on the inner wall of the spoon body 11. Once a sufficient sample has been collected, the sampling spoon 1 is removed from the reactor, completing an efficient and safe coke oven flue gas denitrification catalyst sampling operation.
[0052] Example 2:
[0053] Reference Figure 2-3 and Figure 6 This embodiment proposes a sampling device for coke oven flue gas denitrification catalyst, including a sampling spoon 1. The sampling spoon 1 includes a spoon body 11 and a handle 12. The spoon body 11 is hemispherical, and the inner wall of the spoon body 11 is provided with scale lines 112. A guide groove 111 is opened at the top edge of the spoon body 11. The cross-section of the guide groove 111 is an inverted triangle. The outer wall of the spoon body 11 is connected to one end of the handle 12. An impact cone 2 is provided inside the spoon body 11. The impact cone 2 is a cone. The top of the impact cone 2 extends out of the spoon body 11. The bottom of the impact cone 2 is connected to a connecting part 3. The connecting part 3 is a cylindrical structure. The outer diameter of the connecting part 3 is equal to the outer diameter of the bottom end of the impact cone 2. The outer circumferential surface of the connecting part 3 is provided with external threads. The bottom of the spoon body 11 is provided with a connecting groove that mates with the connecting part 3. The inner wall of the connecting groove is provided with internal threads. The connecting groove is threadedly connected to the connecting part 3.
[0054] The impact cone 2 is divided into a base 21 and a tip 22. The top center of the base 21 is connected to a stud 23, which is vertically set. The bottom of the tip 22 has a threaded hole that can be threadedly connected to the stud 23.
[0055] The handle 12 includes a first rod 121 and a second rod 122. One end of the first rod 121 is connected to the outer wall of the spoon body 11. The other end of the first rod 121 has a telescopic hole 123 extending along the length of the first rod 121. A limiting hole is opened on the outer surface of the first rod 121. An internal thread is opened in the limiting hole. The limiting hole is threadedly connected to a flat-head screw 124. The second rod 122 can be inserted into the telescopic hole 123.
[0056] Work process:
[0057] First, adjust the length of handle 12. Loosen the flat-head screw 124 in the limiting hole on the outer surface of rod 121. Adjust rod 2 122 within the telescopic hole 123 of rod 121. Once the appropriate length is reached, tighten the flat-head screw 124 to fix rod 2 122, ensuring that the length of handle 12 is suitable for operation requirements.
[0058] Check the connection between the impact cone 2 and the spoon body 11. By rotating the connecting part 3, ensure that the connecting part 3 at the bottom of the impact cone 2 is tightly threaded into the connecting groove at the bottom of the spoon body 11 to prevent the impact cone 2 from loosening during sampling. At the same time, check the tip 22 of the impact cone 2 and the base 21 to ensure that the two are firmly connected by the stud 23 and the screw hole.
[0059] The operator, holding handle 12, slowly and carefully inserts the sampling spoon 1 into the denitrification reactor through the manhole, moving it towards the bottom of the upper catalyst layer. Once the sampling spoon 1 reaches the appropriate position at the bottom of the upper catalyst layer, the operator swings the handle 12 back and forth, left and right, or pulls it up and down, causing the tip 22 of the impact cone 2 to repeatedly strike the bottom of the catalyst. Because the impact cone 2 is conical, its sharp tip generates a large impact force, causing the catalyst to gradually pulverize. The pulverized catalyst particles, under the influence of gravity, slide down the inner wall of the hemispherical spoon body 11 and accumulate at the bottom of the spoon body 11. The amount of catalyst sample collected is monitored in real time by observing the scale lines 112 on the inner wall of the spoon body 11. When the sample amount reaches the required standard, the impact operation is stopped. The sampling spoon 1 is then slowly and smoothly withdrawn from the denitrification reactor, taking care to avoid shaking the spoon body 11 and causing sample spillage.
[0060] After the sample is removed, if the tip 22 of the impact cone 2 is worn, the tip 22 can be rotated to separate it from the stud 23 of the base 21, making it easy to replace the new tip 22. If the spoon body 11 or the impact cone 2 needs to be cleaned or maintained later, the connecting part 3 can be rotated to remove the impact cone 2 from the spoon body 11.
[0061] Through the above process, this embodiment can efficiently and safely complete the sampling of coke oven flue gas denitrification catalyst without stopping the machine for cooling or requiring personnel to enter the reactor.
[0062] Example 3:
[0063] Reference Figure 4-6This embodiment proposes a sampling device for coke oven flue gas denitrification catalyst, including a sampling spoon 1. The sampling spoon 1 includes a spoon body 11 and a handle 12. The spoon body 11 has a flat-bottomed bowl-shaped structure, and a guide groove 111 is formed on the top edge of the spoon body 11. The cross-section of the guide groove 111 is an inverted triangle. The outer wall of the spoon body 11 is connected to one end of the handle 12. An impact cone 2 is provided inside the spoon body 11. The impact cone 2 is a cone, and its top end extends out of the spoon body 11. The bottom of the impact cone 2 is connected to a connecting part 3. The connecting part 3 has a cylindrical structure, and its outer diameter is equal to the outer diameter of the bottom end of the impact cone 2. The outer circumferential surface of the connecting part 3 is provided with external threads. The bottom of the spoon body 11 is provided with a connecting groove that mates with the connecting part 3. The inner wall of the connecting groove is provided with internal threads, and the connecting groove is threadedly connected to the connecting part 3.
[0064] The handle 12 includes a first rod 121 and a second rod 122. One end of the first rod 121 is connected to the outer wall of the spoon body 11. The other end of the first rod 121 has a telescopic hole 123 extending along the length of the first rod 121. A limiting hole is opened on the outer surface of the first rod 121. An internal thread is opened in the limiting hole. The limiting hole is threadedly connected to a flat-head screw 124. The second rod 122 can be inserted into the telescopic hole 123.
[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A sampling device for denitrification catalyst in coke oven gas, comprising a sampling spoon (1), the sampling spoon (1) comprising a spoon body (11) and a handle (12), the outer wall of the spoon body (11) being connected to one end of the handle (12), characterized in that, The inside of the spoon body (11) is provided with an impact cone (2). The impact cone (2) is a cone structure. The bottom end of the impact cone (2) is connected to the inner bottom of the spoon body (11), and the top end of the impact cone (2) extends out of the spoon body (11).
2. The sampling device for coke oven flue gas denitrification catalyst according to claim 1, characterized in that, The spoon body (11) is a hemispherical or flat-bottomed bowl-shaped structure.
3. The sampling device for coke oven flue gas denitrification catalyst according to claim 2, characterized in that, The impact cone (2) is a triangular cone, and the bottom of the impact cone (2) is welded to the inner wall of the spoon body (11).
4. The sampling device for coke oven flue gas denitrification catalyst according to claim 2, characterized in that, The impact cone (2) is a cone. The bottom of the impact cone (2) is connected to the connecting part (3). The connecting part (3) is a cylindrical structure. The outer diameter of the connecting part (3) is equal to the outer diameter of the bottom end of the impact cone (2). The outer circumferential surface of the connecting part (3) is provided with external threads. The bottom of the spoon body (11) is provided with a connecting groove that matches the connecting part (3). The inner wall of the connecting groove is provided with internal threads. The connecting groove is threadedly connected to the connecting part (3).
5. The sampling device for coke oven flue gas denitrification catalyst according to claim 1, characterized in that, The inner wall of the spoon body (11) is provided with scale lines (112).
6. The sampling device for coke oven flue gas denitrification catalyst according to claim 1, characterized in that, A guide groove (111) is opened on the top edge of the spoon body (11).
7. A sampling device for coke oven flue gas denitrification catalyst according to claim 6, characterized in that, The cross-section of the guide channel (111) is an inverted triangle.
8. A sampling device for coke oven flue gas denitrification catalyst according to claim 4, characterized in that, The impact cone (2) is divided into a base (21) and a tip (22) at the top and bottom, and the base (21) and tip (22) are detachably connected.
9. A sampling device for coke oven flue gas denitrification catalyst according to claim 8, characterized in that, The top center of the base (21) is connected to the stud (23). The stud (23) is set vertically, and the bottom of the tip (22) has a screw hole that can be threaded to the stud (23).
10. A sampling device for coke oven flue gas denitrification catalyst according to claim 1, characterized in that, The handle (12) includes a first rod (121) and a second rod (122). One end of the first rod (121) is connected to the outer wall of the spoon body (11). The other end of the first rod (121) has a telescopic hole (123) extending along the length of the first rod (121). A limit hole is opened on the outer surface of the first rod (121). An internal thread is opened in the limit hole. The limit hole is threadedly connected to a flat-head screw (124). The second rod (122) can be inserted into the telescopic hole (123).