Portable ultralow-temperature SCR (Selective Catalytic Reduction) denitration catalyst effect evaluation device
By designing a portable ultra-low temperature SCR denitrification catalyst performance evaluation device, the problem of the inability to quickly test ultra-low temperature catalysts in existing technologies has been solved, realizing low-cost and high-efficiency catalyst performance evaluation.
Patent Information
- Application Number
- CN202520353496.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing portable SCR catalyst evaluation devices are not suitable for cryogenic catalysts, making it impossible to conduct low-cost and rapid testing.
A portable ultra-low temperature SCR denitrification catalyst effect evaluation device was designed, including a gas cylinder, a gas pump, a flue gas heating gun, a catalytic reaction device and a flue gas analyzer, which can rapidly test the catalyst effect in the range of 80-160℃.
It enables portable testing, expands the temperature range for catalyst evaluation, reduces testing costs, and improves testing efficiency.
Smart Images
Figure CN223857155U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to catalyst effect evaluation technical field, concretely is a portable ultralow temperature SCR denitration catalyst effect evaluation device. BACKGROUND
[0002] With the rapid development of chemical industry, the demand for catalyst evaluation devices is increasing, and different types of catalyst evaluation devices need to be selected for different catalytic reactions. At the same time, the improvement of environmental awareness and the increasing demand for green catalytic technology and high-efficiency catalysts promote the diversified development of the market.
[0003] Modern catalyst evaluation devices integrate more functions and advanced detection technologies, improving the accuracy and efficiency of experiments. The development of intelligent technology enables these devices to have automatic control, data acquisition and real-time monitoring functions, greatly improving the reliability and convenience of experiments. At the same time, catalyst evaluation devices are widely used in scientific research, industrial catalytic process development, catalytic reaction optimization and other fields, and have important applications in materials science, chemistry, environmental science and other fields.
[0004] Nitrogen oxide (NO x ) is one of the main sources of air pollution, and the research and development of effective control and emission reduction technology is particularly important. Among the many emission reduction technologies, selective catalytic reduction (SCR) technology is widely used due to its high efficiency and economy. SCR technology is a process that uses catalysts to react nitrogen oxides (NO x ) in flue gas with reducing agents (such as ammonia water or urea solution) to produce harmless nitrogen (N2) and water (H2O). In this process, the selection and use of catalysts are crucial.
[0005] In the prior art, SCR catalyst evaluation devices are commonly used for quality control, catalyst screening and evaluation of the service life of used catalysts. The device can be used for multiple sets of gaseous sampling, has a simulation gas mixing function, can fully preheat the mixed gas, and can realize adsorption application testing at constant temperature and desorption experiment of adsorbed substances at high temperature; It has high-precision flow control, pressure control and temperature control; It is equipped with a high degree of automation gas sampling device and advanced imported gas analysis instrument, such as high-resolution chemiluminescence analyzer and Fourier transform infrared spectrometer, which can monitor the change of gas composition in real time; Special automatic sampling process and online analysis instrument are adopted to ensure the accuracy, reliability and repeatability of evaluation data. The safety system monitors the system operation state in real time to ensure the safety of operators and the system.
[0006] The catalytic reaction temperature range of the low-temperature SCR denitration catalyst is generally 180-420 DEG C, and the denitration catalyst in this temperature range has been widely used in the industrial field. With the continuous progress of science and technology, more and more ultra-low temperature denitration catalysts suitable for ultra-low temperature range (i.e. temperature below 180 DEG C) have been successfully developed. The traditional low-temperature and medium-high temperature SCR catalyst evaluation device is a fixed large device, on the one hand, the heating control system part uses a tubular furnace or a heating wire to heat the gas, and the reaction system is a fixed bed reactor. These devices cannot be moved, which is not conducive to rapid performance testing. On the other hand, because the device is a non-standard product, the cost is high, which is not conducive to testing the performance of the catalyst under limited budget.
[0007] Therefore, it is urgent to provide a portable ultra-low temperature SCR denitration catalyst effect evaluation device to solve the problem of inconvenience in carrying and inability to test the performance of the ultra-low temperature catalyst at low cost in the prior art. Practical new type content
[0008] In view of the above fact, the present application is designed to solve the problem of inconvenience in carrying and inability to test the performance of the ultra-low temperature catalyst at low cost in the prior art, and further designs a portable ultra-low temperature SCR denitration catalyst effect evaluation device.
[0009] To achieve the above purpose, the present application adopts the following technical scheme:
[0010] A portable ultra-low temperature SCR denitration catalyst effect evaluation device, comprising a first gas cylinder, a second gas cylinder, a third gas cylinder, a fourth gas cylinder, a fifth gas cylinder, a gas mixing bag, a gas pump, a flue gas heating gun, a catalytic reaction device, a gas collecting bag and a flue gas analyzer.
[0011] The first gas cylinder, the second gas cylinder, the third gas cylinder, the fourth gas cylinder and the fifth gas cylinder are independently connected and intersected to the first pipeline, and the first pipeline is connected to the gas mixing bag.
[0012] The gas mixing bag, the flue gas heating gun, the catalytic reaction device, the gas collecting bag and the flue gas analyzer are connected in sequence.
[0013] The gas pump is connected between the gas mixing bag and the flue gas heating gun.
[0014] One side of the second pipeline is connected between the gas mixing bag and the flue gas heating gun, and the other side is connected to the flue gas analyzer.
[0015] The gas in the first gas cylinder is O2, the gas in the second gas cylinder is SO2, the gas in the third gas cylinder is NH3, the gas in the fourth gas cylinder is NO, and the gas in the fifth gas cylinder is N2.
[0016] The temperature of the flue gas heating gun is controlled at 80-160 DEG C, and the model is MH3011G heating type.
[0017] Further, the catalytic reaction device model is ZFC100 or ZFC200.
[0018] The pipe of the catalytic reaction device is filled with catalyst.
[0019] Further, the flue gas heating gun heats the inlet air, and the hose exhausts the air, and the tail controls the heating.
[0020] Further, the flue gas analyzer is driven to intake air, and the model is YQ3000-B.
[0021] The beneficial effects of the utility model lie in:
[0022] 1. The utility model has small volume and is movable and convenient to carry.
[0023] 2. The utility model can quickly test the denitration function of the ultralow-temperature catalyst and directly evaluate the catalyst effect.
[0024] 3. The existing SCR catalyst evaluation device is mainly used for evaluating the catalyst with the temperature interval of 180-420 DEG C, the utility model can evaluate the catalyst with the temperature of 80-160 DEG C, greatly widens the evaluation range, and better reduces the evaluation cost. DETAILED DESCRIPTION
[0025] Figure 1 It is the whole structure schematic view of the utility model.
[0026] In the figure, 1 is a first gas cylinder, 2 is a second gas cylinder, 3 is a third gas cylinder, 4 is a fourth gas cylinder, 5 is a fifth gas cylinder, 6 is a gas mixing bag, 7 is a gas pump, 8 is a flue gas heating gun, 9 is a catalytic reaction device, 10 is a catalyst, 11 is a gas collecting bag, and 12 is a flue gas analyzer. DETAILED DESCRIPTION
[0027] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the present application embodiment will be clearly and completely described below in combination with the drawings in the present application embodiment. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.
[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances in order to describe the embodiments of the present application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or apparatus including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or apparatuses.
[0029] In the present application, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0030] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific circumstances.
[0031] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally constructed; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. Those of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific circumstances.
[0032] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
[0033] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0034] Embodiment 1: A portable ultra-low temperature SCR denitration catalyst effect evaluation device of the present embodiment, comprising a first gas cylinder 1, a second gas cylinder 2, a third gas cylinder 3, a fourth gas cylinder 4, a fifth gas cylinder 5, a gas mixing bag 6, a gas pump 7, a smoke heating gun 8, a catalytic reaction device 9, a gas collecting bag 11, and a smoke analyzer 12.
[0035] The first gas cylinder 1, the second gas cylinder 2, the third gas cylinder 3, the fourth gas cylinder 4 and the fifth gas cylinder 5 are independently connected and merged into a first pipeline, and the first pipeline is connected with a gas mixing bag 6;
[0036] The gas mixing bag 6, a smoke heating gun 8, a catalytic reaction device 9 and a gas collecting bag 11 are sequentially connected with a smoke analyzer 12.
[0037] The gas pump 7 is connected between the gas mixing bag 6 and the smoke heating gun 8.
[0038] One side of a second pipeline is connected between the gas mixing bag 6 and the smoke heating gun 8, and the other side is connected with the smoke analyzer 12.
[0039] The gas in the first gas cylinder 1 is O2, the gas in the second gas cylinder 2 is SO2, the gas in the third gas cylinder 3 is NH3, the gas in the fourth gas cylinder 4 is NO, and the gas in the fifth gas cylinder 5 is N2.
[0040] The temperature of the smoke heating gun 8 is controlled at 80-160℃, and the model is MH3011G heating type.
[0041] More specifically, the catalytic reaction device 9 is of ZFC100 or ZFC200 model, adopts a quick-change joint type design, and the filter element can be replaced without tools; the device is of a straight-through type design and is provided with a bracket support.
[0042] The catalytic reaction device 9 is filled with a catalyst 10 in the pipeline to ensure that all the flue gas can pass through the catalyst.
[0043] More specifically, the gas mixing bag 6 is used and prepared on site, and the concentration of simulated flue gas can be adjusted at any time.
[0044] More specifically, the smoke heating gun 8 heats the inlet, and the outlet is provided with a hose, and the tail controls the heating.
[0045] More specifically, the gas collecting bag 11 is convenient to carry and move.
[0046] More specifically, the smoke analyzer 12 is of a YQ3000-B type and is of a positive inlet mode, and can measure the concentrations of NO x , SO2 and O2.
[0047] In the embodiment, the effect evaluation method of the catalyst is as follows:
[0048]
[0049] The unit of the NO x removal rate is %, the NO x inlet concentration, the NO x outlet concentration and the NO x inlet concentration are all ppm.
[0050] The catalyst 10 is usually vanadium-based catalyst, titanium-based catalyst, manganese-based catalyst and carbon-based catalyst.
[0051] The bamboo charcoal-based ultra-low temperature catalyst was evaluated under ultra-low temperature conditions using the set of devices. The catalyst 10 was added in the amount of 0.2 g in the catalytic reaction device 9.
[0052] The simulated flue gas with a certain concentration was arranged in the gas mixing device 6, and the concentration of each component of the flue gas was measured. The gas was heated to a certain temperature by the gas heating device 8, and the catalytic reaction was carried out at the temperature. The concentration of each component of the gas after the catalytic reaction of the catalyst 10 was measured again, and the effect of the catalyst was finally evaluated.
[0053] Experiment 1: The mixed gas with the concentration of 5.7% of O2, 379 ppm of NO x and 18 ppm of SO2 was arranged, and the balance gas was N2. The gas was heated to 80℃, and the catalytic reaction was carried out at the temperature. The concentration of each component of the gas after the catalytic reaction of the bamboo charcoal-based ultra-low temperature catalyst was measured again, and the removal rate of NO x was calculated.
[0054] At this time, the concentration of O2 was 5.2%, the concentration of NO x was 122 ppm, the concentration of SO2 was 0 ppm, and the removal rate of NO x was 67.8%.
[0055] Before the experiment:
[0056] Gas Concentration O2 5.7％ NO x ]] 379 ppm SO2 18 ppm <![CDATA[N2]]> Equilibration gas
[0057] Experimental results:
[0058] Gas Concentration O2 5.2％ NO x ]] 122 ppm SO2 0 ppm NO x removal rate 67.8％
[0059] Experiment 2: The mixed gas with the concentration of 5.9% of O2, 457 ppm of NO x and 22 ppm of SO2 was arranged, and the balance gas was N2. The gas was heated to 120℃, and the catalytic reaction was carried out at the temperature. The concentration of each component of the gas after the catalytic reaction of the bamboo charcoal-based ultra-low temperature catalyst was measured again, and the removal rate of NO x was calculated.
[0060] At this time, the concentration of O2 was 5.1%, the concentration of NO x was 87 ppm, the concentration of SO2 was 0 ppm, and the removal rate of NO x was 80.9%.
[0061] Before the experiment:
[0062] Gas Concentration O2 5.9％ NO x ]] 457 ppm SO2 22 ppm [N2] Equilibration gas
[0063] Experimental results:
[0064]
[0065]
[0066] Experiment 3: Prepare a solution with a concentration of 6.2% O2 and 430 ppm NO. x A mixture of gases containing 21 ppm SO2, with N2 as the equilibrium gas; the gas is heated to 160℃ and subjected to a catalytic reaction at this temperature. The concentrations of each component in the gas after the reaction with a reed-based charcoal-based cryogenic catalyst are measured again, and the NO concentration is calculated. x Removal rate;
[0067] At this time, the O2 concentration is 5%, NO x The concentration was 53 ppm, SO2 concentration was 0 ppm, and NO concentration was 0 ppm. x The removal rate was 87.6%.
[0068] Before the experiment:
[0069] Gas Concentration O2 6.2％ NO x ]] 430 ppm SO2 21 ppm [N2] Equilibration gas
[0070] Experimental results:
[0071] Gas Concentration O2 5％ NO x ]]> 53 ppm SO2 0 ppm NO x removal rate 87.6％
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; as long as there is no structural conflict, the features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.
[0073] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A portable ultra-low-temperature SCR denitration catalyst effect evaluation device, characterized in that, It comprises a first gas cylinder (1), a second gas cylinder (2), a third gas cylinder (3), a fourth gas cylinder (4), a fifth gas cylinder (5), a mixed gas bag (6), a gas pump (7), a flue gas heating gun (8), a catalytic reaction device (9), a gas collecting bag (11), a flue gas analyzer (12); The first gas cylinder (1), the second gas cylinder (2), the third gas cylinder (3), the fourth gas cylinder (4) and the fifth gas cylinder (5) are independently connected and intersected to the first pipeline, and the first pipeline is connected to the mixed gas bag (6); The mixed gas bag (6), the flue gas heating gun (8), the catalytic reaction device (9), the gas collecting bag (11) and the flue gas analyzer (12) are connected in sequence; The gas pump (7) is connected between the mixed gas bag (6) and the flue gas heating gun (8); One side of the second pipeline is connected between the mixed gas bag (6) and the flue gas heating gun (8), and the other side is connected to the flue gas analyzer (12); The gas in the first gas cylinder (1) is O2, the gas in the second gas cylinder (2) is SO2, the gas in the third gas cylinder (3) is NH3, the gas in the fourth gas cylinder (4) is NO, and the gas in the fifth gas cylinder (5) is N2; The temperature of the flue gas heating gun (8) is controlled at 80-160℃, and the model is MH3011G heating type. 2.The portable ultra-low temperature SCR denitration catalyst effect evaluation device according to claim 1, characterized in that: The model of the catalytic reaction device (9) is ZFC100 or ZFC200; The catalytic reaction device (9) is filled with a catalyst (10) in the pipe. 3.The portable ultra-low temperature SCR denitration catalyst effect evaluation device according to claim 1, characterized in that: The flue gas heating gun (8) heats the inlet, and the hose exhausts, and the tail controls heating.
4. The portable ultra-low temperature SCR denitration catalyst effect evaluation device according to claim 1, characterized in that: The flue gas analyzer (12) is a YQ3000-B type with active air inlet.