Catalytic reactor pilot plant for sintering flue gas CO and NOx multi-effect catalyst

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a pilot plant for a catalytic reactor of a multi-effect catalyst for sintering flue gas CO and NOx. Comprising a flue, a sealing device and a sensor, a cavity for flue gas circulation is formed in the flue; a bearing platform is further arranged on the flue; the bearing platform is used for bearing the catalyst module, so that the flue gas passes through the catalyst module; a hoisting opening is formed in the flue; the sealing device is buckled on the hoisting opening; the sealing device can move relative to the flue so as to open or close the hoisting opening; the sealing device, the hoisting opening and the bearing platform are sequentially arranged in the vertical direction. The sensor is arranged on the flue; and the sensors are arranged along the circulation direction of the flue gas. In the prior art, a pilot plant is only suitable for an experimental environment and is greatly different from an industrial production state, so that related products are difficult to put into practical application. Compared with the prior art, the device can be effectively matched with an actual catalyst module so as to be matched with an actual industrial production state.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a pilot device for a catalytic reactor of a multi-effect catalyst for CO and NOx in sintering flue gas. Background Art

[0002] CO is a common emission pollutant in industrial furnace production. CO is colorless, odorless, and has relatively stable chemical properties. CO is called the sixth major standard air pollutant. The treatment of CO in industrial furnaces is not only a requirement for environmental protection but also an important influencing factor for achieving carbon neutrality and carbon peak. In addition, NOx is also a common air pollutant, which can cause a series of problems such as acid rain, photochemical smog, and eutrophication of surface water. Therefore, the CO and NOx discharged into the atmosphere pose great harm to human health and the natural environment.

[0003] With the increasingly strict environmental protection requirements, the treatment of CO and NOx in flue gas has become an important problem faced by industries such as iron and steel sintering and coking, cement building materials, and waste incineration. Generally, a multi-effect catalyst for CO and NOx is used to treat flue gas. The catalyst includes two categories: precious metals and non-precious metals. In order to verify the effectiveness of the catalyst, it is necessary to pre-test through a pilot device and obtain test data through the pilot device to reduce related risks. However, the existing pilot devices are too small in size, and can only ensure that the catalyst tested is the same material as the catalyst in the actual industrial application catalyst module. And the catalyst module is too large in volume and weight, often reaching hundreds of catties, which results in the obtained results being limited to the laboratory environment and having a large gap with the actual industrial production state, thus making it difficult for related products to be put into industrial production applications. Summary of the Utility Model

[0004] Aiming at the technical problems of the existing technology, the utility model provides a pilot device for a catalytic reactor of a multi-effect catalyst for CO and NOx in sintering flue gas.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A pilot device for a catalytic reactor of a multi-effect catalyst for CO and NOx in sintering flue gas, comprising: a flue, a sealing device, and a sensor; a cavity for flue gas to flow through is provided in the flue; a bearing platform is further provided on the flue; the bearing platform is used for bearing the catalyst module so that the flue gas passes through the catalyst module; a hoisting opening is provided on the flue; the sealing device is buckled on the hoisting opening; the sealing device can move relative to the flue to open or close the hoisting opening; the sealing device, the hoisting opening, and the bearing platform are arranged in sequence along the vertical direction; the sensor is installed on the flue; the sensors are arranged along the flow direction of the flue gas.

[0007] In actual application, the relative position of the sealing device and the flue is adjusted so that the lifting opening is open. Since the sealing device, the lifting opening, and the bearing platform are arranged in sequence in the vertical direction, the catalyst module can be directly lifted into the flue through the lifting opening by a lifting device. After the catalyst module is placed on the bearing platform, the relative position of the sealing device and the flue is adjusted so that the lifting opening is sealed. At this time, the flue gas can be introduced into the flue. Since the catalyst module used in actual industrial production is directly lifted, the introduced flue gas can be consistent with the flue gas discharged during industrial production, so that the test conditions are consistent with actual industrial production, and further the data obtained by the sensor is matched with the actual state. Thus, by using the present utility model, it is extremely convenient to quickly put the relevant catalyst products into industrial production.

[0008] Further, the sealing device includes a sealing cover and a movable rod; the sealing cover corresponds to the lifting opening; one end of the movable rod is rotatably connected to the sealing cover; the other end of the movable rod is connected to the flue.

[0009] Further, a sealing plate is provided on the sealing cover; when the sealing cover is buckled on the lifting opening, the sealing plate fits against the side wall of the lifting opening.

[0010] Further, the sealing device further includes a locking rod; one end of the locking rod is swingably connected to the flue; the other end of the locking rod is in transmission connection with the movable rod to drive the sealing cover to move relative to the flue through the movable rod.

[0011] Further, a transmission groove is provided on the locking rod; a sliding groove is provided on the flue; the sliding groove intersects the swinging path of the locking rod; a transmission rod is provided on the movable rod; the transmission rod penetrates through the movable rod; one end of the transmission rod extends into the sliding groove, and the other end extends into the transmission groove.

[0012] Further, the bearing platform includes a mounting plate and a bearing plate; the bearing plates are respectively arranged on both sides of the mounting plate; one end of the bearing plate is fixedly connected to the mounting plate; one side of the bearing plate extends into the cavity of the flue, and the other side is slidably embedded in the flue.

[0013] Further, a stud is fixedly provided at one end of the bearing plate away from the mounting plate; the stud penetrates through the flue. Description of the Drawings

[0014] Figure 1 : Overall structure diagram.

[0015] Figure 2 : Structure diagram of the sealing device.

[0016] Figure 3 : Structure diagram of the bearing platform.

[0017] Figure 4 : Internal sectional view.

[0018] Figure 5 : Test result diagram.

[0019] In the figure: 1. Flue; 2. Sealing device; 11. Bearing platform; 12. Hoisting opening; 21. Sealing cover; 22. Movable rod; 13. Chute; 23. Locking rod; 231. Transmission groove; 111. Mounting plate; 112. Bearing plate; 1121. Stud; 221. Transmission rod; 211. Sealing plate; 31. Flue gas flowmeter; 32. First flue gas pressure differential instrument; 33. CO inlet concentration sensor; 34. First flue gas temperature instrument; 35. NOx inlet concentration sensor; 36. Second flue gas temperature instrument; 37. CO outlet concentration sensor; 38. NOx outlet concentration sensor; 39. Second flue gas pressure differential instrument. Specific implementation mode

[0020] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0021] A pilot-scale device for a catalytic reactor of a multi-effect catalyst for sintering flue gas CO and NOx includes: a flue 1, a sealing device 2, and sensors. Among them, the flue 1 is an n-shaped pipe with a cavity for flue gas flow opened inside. A hoisting opening 12 is opened on one vertical side of the flue 1, and the hoisting opening 12 is communicated with the cavity inside the flue 1. A bearing platform 11 is also provided on the flue 1. The bearing platform 11 includes a mounting plate 111 and a bearing plate 112. The mounting plate 111 is a rectangular plate member, and the surface of the mounting plate 111 is flush with the surface of the flue 1. The bearing plate 112 is a rectangular plate member. The number of the bearing plates 112 is two, which are respectively arranged on both sides of the mounting plate 111. One end of the bearing plate 112 is fixedly connected to the mounting plate 111, and the other end is fixedly provided with a stud 1121. The stud 1121 penetrates through the flue 1, and by screwing a nut on the stud 1121, the bearing platform 11 can be fixed on the flue 1. At the same time, one side of the bearing plate 112 extends into the cavity of the flue 1, and the other side can be slidably embedded in the flue 1. A through groove corresponding to the bearing plate 112 is opened in the flue 1. On the other hand, the sealing device 2, the hoisting opening 12, and the bearing platform 11 are arranged in sequence along the vertical direction. That is, the three are located on the same side of the flue 1.

[0022] The sealing device 2 includes a sealing cover 21, a movable rod 22, and a locking rod 23. The shape of the sealing cover 21 matches that of the hoisting opening 12, so that the sealing cover 21 can be buckled on the hoisting opening 12. At the same time, a sealing plate 211 is provided on the sealing cover 21. The sealing plate 211 is arranged along the outer edge of the sealing cover 21 and corresponds to the hoisting opening 12. When the sealing cover 21 is buckled on the hoisting opening 12, the sealing plate 211 can be attached to the side wall of the hoisting opening 12. One end of the locking rod 23 is swingably connected to the flue 1, and a transmission groove 231 is provided at the other end. Preferably, a handle for manually turning the locking rod 23 can be fixedly assembled on the locking rod 23 to facilitate manual turning of the locking rod 23 for swinging. An electric motor can also be assembled on the locking rod 23, and the output end of the electric motor is connected to the swing shaft of the locking rod 23, so that the electric motor can drive the locking rod 23 to swing. One end of the movable rod 22 is rotatably connected to the sealing cover 21, and a transmission rod 221 is provided at the other end of the movable rod 22. The transmission rod 221 is a cylindrical structure, and the transmission rod 221 penetrates through the movable rod 22. A sliding groove 13 corresponding to the transmission rod 221 is horizontally provided on the flue 1. The opening path of the sliding groove 13 intersects with the swinging path of the locking rod 23. At the same time, one end of the transmission rod 221 is slidably inserted into the sliding groove 13, and the other end is slidably inserted into the transmission groove 231. Thus, the movable rod 22 is connected to the flue 1 through the transmission rod 221.

[0023] The sensors are installed on the flue 1. The sensors include a flue gas flow meter 31, a first flue gas pressure differential instrument 32, a CO inlet concentration sensor 33, a first flue gas temperature instrument 34, a NOx inlet concentration sensor 35, a second flue gas temperature instrument 36, a CO outlet concentration sensor 37, a NOx outlet concentration sensor 38, and a second flue gas pressure differential instrument 39. The foregoing devices are arranged along the flow direction of the flue gas. Among them, the flue gas flow meter 31, the first flue gas pressure differential instrument 32, the CO inlet concentration sensor 33, the first flue gas temperature instrument 34, and the NOx inlet concentration sensor 35 are arranged before the flue gas flows through the catalyst module, and the second flue gas temperature instrument 36, the CO outlet concentration sensor 37, the NOx outlet concentration sensor 38, and the second flue gas pressure differential instrument 39 are arranged after the flue gas flows through the catalyst module. Thus, various types of data can be fully obtained.

[0024] In actual application, the number of the bearing platforms 11 is two, and the two bearing platforms 11 are arranged vertically to respectively assemble a catalyst module. A sufficient interval is left between the two bearing platforms 11, so that after the two catalyst modules are all assembled into the flue 1, there is a certain gap between the two catalyst modules. For the sake of convenient description below, the bearing platform 11 far from the ground is called the first bearing platform, and the bearing platform 11 close to the ground is called the second bearing platform.

[0025] When the catalyst module needs to be assembled, the locking rod 23 is pulled in advance so that the locking rod 23 swings to the right as shown in the accompanying drawings. During the swinging process of the locking rod 23, the locking rod 23 drives the transmission rod 221 to slide along the slide groove 13 through the transmission groove 231, and then drives the end of the movable rod 22 to translate along the slide groove 13, thereby pushing the sealing cover 21 so that the sealing cover 21 is away from the lifting port 12. When the locking rod 23 moves to the limit distance, the sealing cover 21 is completely separated from the lifting port 12. At this time, the position of the sealing cover 21 is adjusted so that the sealing cover 21 and the movable rod 22 rotate relative to each other to fit the sealing cover 21 with the side wall of the flue 1.

[0026] At the same time, remove the nuts of the first bearing platform and knock the studs 1121 to slide the mounting plate 111 relative to the flue 1, so that the mounting plate 111 protrudes from the surface of the flue 1. At this time, the mounting plate 111 can be pulled to remove the first bearing platform from the flue 1.

[0027] At this point, the catalyst module is hoisted using a lifting device and placed into flue 1 through lifting port 12 until it rests on support plate 112 of the second support platform. Once the catalyst module is stabilized, the catalyst module and flue 1 are large enough for an operator to enter, allowing them to fill the gap between the catalyst module and flue 1 with refractory wool. Once filled, the first support platform is reinstalled on flue 1 and the nuts are screwed onto studs 1121 to secure it again.

[0028] After the first supporting platform is fixed, the second catalyst module is lifted by the lifting device, and the catalyst module is lifted into the flue 1 through the lifting port 12, and the above process is repeated to complete the assembly of the catalyst module.

[0029] After both catalyst modules are assembled, swing the locking lever 23 in the reverse direction, so that the locking lever 23 drives the sealing cover 21 to approach the lifting port 12 through the movable lever 22. At the same time, adjust the position of the sealing cover 21 so that the sealing cover 21 can be buckled on the lifting port 12. When the locking lever 23 moves to the limit position, the sealing cover 21 is completely buckled on the lifting port 12 and the sealing plate 211 is fully attached to the outer edge of the lifting port 12. At this time, lock the locking lever 23. There are many ways to lock the locking lever 23. For example, corresponding pin holes can be opened on the flue 1. After the locking lever 23 moves to the designated position, insert the pin into the pin hole through the transmission groove 231 to complete the locking of the locking lever 23. Thus, the sealing of the lifting port 12 is completed. In summary, through the structure of the sealing device 2, on the one hand, the movement range of the sealing cover 21 is increased, so as to facilitate adjusting the position state of the sealing cover 21 according to actual needs. On the other hand, compared with directly hinging the sealing cover 21 on the flue 1, it is extremely convenient for the cooperation between the sealing plate 211 and the lifting port 12, so that the gap between the sealing cover 21 and the lifting port 12 is easier to control.

[0030] At this point, the flue gas can be introduced into the flue 1, and the flue gas in the flue 1 is reheated by the flue gas reheating system to make the temperature of the flue gas conform to the actual state. At the same time, corresponding parameters are obtained through the sensor. Preferably, the catalyst in one of the catalyst modules is a CO and NOx multi-effect catalyst prepared by co-extrusion method, and the catalyst in the other catalyst module is a CO and NOx multi-effect catalyst prepared by sol impregnation method.

[0031] In summary, through the foregoing structural design, the utility model can directly use the catalyst module for corresponding tests, so that the flue gas introduced into the flue 1 is consistent with the flue gas generated during actual production. Specifically, the parameters of the flue gas introduced into the flue are as follows: the catalyst flue gas flow rate is 2000-10000 Nm3 / h, the sintering flue gas temperature is 180-280 °C, the dust content is 5-15 mg / Nm3, the H2O content is 5%-15%, the SO2 content is 10-35 mg / Nm3, the CO inlet concentration is 2000-8000 mg / Nm3, the NOx inlet concentration is 150-400 mg / Nm3, and the O2 content is 14%-17%. Taking the chemical life of the catalyst and the detection time as an example, the existing pilot plants are mostly several hours or several days. And the utility model effectively extends the test duration, making the total duration exceed two months, as can be seen in the attached drawings. Thus, using the utility model makes the test state conform to the actual industrial production state, and further enables the tested catalyst module to be quickly put into actual industrial production.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A pilot plant of a catalytic reactor for a multi-effect catalyst for CO and NOx in sintering flue gas, characterized in that: Comprising: A flue (1), a sealing device (2), and a sensor; A cavity for flue gas flow is provided in the flue (1); A bearing platform (11) is further provided on the flue (1); The bearing platform (11) is used to bear the catalyst module so that the flue gas passes through the catalyst module; A hoisting opening (12) is provided on the flue (1); The sealing device (2) is buckled on the hoisting opening (12); The sealing device (2) can move relative to the flue (1) to open or close the hoisting opening (12); The sealing device (2), the hoisting opening (12), and the bearing platform (11) are arranged in sequence along the vertical direction; The sensor is installed on the flue (1); The sensors are arranged along the flow direction of the flue gas.

2. The pilot plant of the catalytic reactor for the multi-effect catalyst of CO and NOx in sintering flue gas according to claim 1, characterized in that: The sealing device (2) includes a sealing cover (21) and a movable rod (22); The sealing cover (21) corresponds to the hoisting opening (12); One end of the movable rod (22) is rotatably connected to the sealing cover (21); The other end of the movable rod (22) is connected to the flue (1).

3. The pilot plant of the catalytic reactor for the multi-effect catalyst of CO and NOx in sintering flue gas according to claim 2, characterized in that: A sealing plate (211) is provided on the sealing cover (21); When the sealing cover (21) is buckled on the hoisting opening (12), the sealing plate (211) fits against the side wall of the hoisting opening (12).

4. The pilot plant of the catalytic reactor for the multi-effect catalyst of CO and NOx in sintering flue gas according to claim 2, characterized in that: The sealing device (2) further includes a locking rod (23); One end of the locking rod (23) is swingably connected to the flue (1); The other end of the locking rod (23) is in transmission connection with the movable rod (22) to drive the sealing cover (21) to move relative to the flue (1) through the movable rod (22).

5. The pilot-scale device of a catalytic reactor for a multi-effect catalyst for CO and NOx in sintering flue gas according to claim 4, characterized in that: A transmission groove (231) is provided on the locking rod (23); A sliding groove (13) is provided on the flue (1); The sliding groove (13) intersects the swinging path of the locking rod (23); A transmission rod (221) is provided on the movable rod (22); The transmission rod (221) penetrates through the movable rod (22); One end of the transmission rod (221) extends into the sliding groove (13), and the other end extends into the transmission groove (231).

6. The pilot plant of the catalytic reactor for the multi-effect catalyst of CO and NOx in sintering flue gas according to claim 1, characterized in that: The bearing platform (11) includes a mounting plate (111) and a bearing plate (112); The bearing plates (112) are respectively arranged on both sides of the mounting plate (111); One end of the bearing plate (112) is fixedly connected to the mounting plate (111); One side of the bearing plate (112) extends into the cavity of the flue (1), and the other side is slidably embedded in the flue (1).

7. The pilot plant of the catalytic reactor for the multi-effect catalyst of sintering flue gas CO and NOx, according to claim 6, is characterized in that: A stud (1121) is fixedly provided at the end of the bearing plate (112) away from the mounting plate (111); The stud (1121) penetrates through the flue (1).

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