Testing device of denitration catalyst for laboratory
By connecting reactors in series and using a laboratory denitrification catalyst testing device with multiple interfaces, the problem that existing technologies can only detect single-layer catalysts has been solved. This enables performance testing and flexible simulation of multi-layer catalysts, improving the applicability and accuracy of the testing.
Patent Information
- Application Number
- CN202520387354.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Existing laboratory testing equipment can only simulate the denitrification effect of a single-layer catalyst and cannot detect the denitrification activity of a mixed multi-layer catalyst.
Design a laboratory denitrification catalyst testing device. It connects at least two reactors in series and has multiple gas inlet and liquid inlet ports. It can simulate the actual working conditions of multilayer catalysts, flexibly adjust the gas composition and flow rate, and is suitable for the detection of different types of catalysts.
It enables performance testing of multilayer catalysts, improves the applicability and accuracy of testing, can flexibly simulate actual working conditions, and simplifies the operation process.
Smart Images
Figure CN223870622U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of denitrification catalyst testing technology, and in particular to a testing device for laboratory denitrification catalysts. Background Technology
[0002] Denitrification catalysts are widely used in SCR denitrification projects in coal-fired power plants, converting nitrogen oxides in flue gas into harmless N2 and H2O. In industrial SCR denitrification reactors, the denitrification catalysts are arranged in a "3+1" configuration, with three layers of catalyst and one spare layer. To achieve good industrial operation results, the activity of the denitrification catalysts must first be tested in the laboratory.
[0003] Existing laboratory testing devices for denitrification catalysts are typically fixed-bed systems. The catalyst is loaded into a reactor, and simulated flue gas is injected to test the catalyst's denitrification efficiency. This approach usually has two problems: first, it can only simulate the denitrification effect of a single-layer catalyst; second, it can only obtain the denitrification efficiency of a single catalyst, and cannot determine the denitrification activity of a mixed catalyst. To address these problems, this invention proposes a laboratory testing device for denitrification catalysts. Utility Model Content
[0004] The purpose of this invention is to provide a test device for laboratory denitrification catalysts that can simulate the denitrification conditions of mixed multilayer catalysts.
[0005] This utility model provides a testing device for a laboratory denitrification catalyst, comprising: at least two reactors connected in series; a main pipeline with multiple air inlets, a liquid inlet and a mixing preheater, and the main pipeline being connected to the first reactor connected in series.
[0006] Furthermore, the reactor comprises a first reactor, a second reactor, a third reactor, and a fourth reactor connected in series, and the main pipeline is connected to the first reactor.
[0007] Furthermore, the connecting pipeline between the mixing preheater, the first reactor, the second reactor, the third reactor, and the fourth reactor is equipped with a heating belt for heat tracing.
[0008] Furthermore, valves are provided on the series pipeline connecting the first reactor, the second reactor, the third reactor, and the fourth reactor.
[0009] Furthermore, one end of the first reactor, the second reactor, the third reactor, and the fourth reactor are connected in parallel, and valves are provided on the parallel pipeline.
[0010] Furthermore, the air intake interface includes a first air intake interface, a second air intake interface, a third air intake interface, and a fourth air intake interface, which are arranged sequentially on the upstream side of the mixing preheater.
[0011] Furthermore, the first air intake port is connected to N2, the second air intake port is connected to O2, the third air intake port is connected to NO, and the fourth air intake port is connected to SO2.
[0012] Furthermore, the air intake interface also includes a fifth air intake interface located downstream of the mixing preheater, the fifth air intake interface being connected to NH3.
[0013] Furthermore, valves and flow meters are respectively provided on the first air intake port, the second air intake port, the third air intake port, the fourth air intake port and the fifth air intake port.
[0014] Furthermore, the liquid inlet is connected to H2O, and a valve and a pump are connected to the liquid inlet.
[0015] This invention utilizes multiple reactors connected in series, allowing for the loading of different types, functions, and compositions of catalysts within each reactor. This facilitates performance testing of multilayered denitrification catalysts under simulated real-world operating conditions. Furthermore, the main pipeline is equipped with multiple air inlets, enabling control over the input of various test gases, not limited to N2, O2, NO, and SO2. It can be flexibly adjusted to other gases such as HCl and VOCs, thus broadening its applicability. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the testing device of this utility model;
[0018] Explanation of reference numerals in the attached figures:
[0019] 1-First reactor; 2-Second reactor; 3-Third reactor; 4-Fourth reactor; 5-Mixing preheater; 6-Pump; 7-Valve; 8-Valve; 9-Valve; 10-Valve; 11-Valve; 12-Flow meter; 13-Flow meter; 14-Flow meter; 15-Flow meter; 16-Valve; 17-Flow meter; 18-Valve; 19-Valve; 20-Valve; 21-Valve; 22-Valve; 23-Valve; 24-Valve. Detailed Implementation
[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0023] Example 1
[0024] like Figure 1 As shown, this utility model provides a testing device for a laboratory denitrification catalyst, comprising: at least two reactors connected in series; a main pipeline with multiple air inlets, a liquid inlet and a mixing preheater 5, and the main pipeline being connected to the first reactor connected in series.
[0025] Specifically, by connecting multiple reactors in series, different types, functions, and compositions of catalysts can be loaded into different reactors, facilitating performance testing of multilayered denitrification catalysts under simulated actual working conditions. Furthermore, the main pipeline is equipped with multiple air inlets, allowing control over the input of different test gases, not limited to N2, O2, NO, and SO2, but flexibly adjustable to other gases such as HCl and VOCs, thus broadening its applicability. The denitrification catalyst testing device of this invention is simple in design and easy to operate, suitable for various types of denitrification catalysts, and can conveniently test the catalyst's denitrification efficiency and SO2 / SO3 conversion rate.
[0026] Example 2
[0027] The reactor comprises a first reactor 1, a second reactor 2, a third reactor 3, and a fourth reactor 4 connected in series, with the main pipeline connected to the first reactor 1. A heating element (not shown) is installed on the connecting pipeline between the mixing preheater 5, the first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 for heat tracing. Valves are installed on the series pipeline between the first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4. One end of the first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 are connected in parallel, and valves are installed on the parallel pipeline.
[0028] Specifically, the heating temperature of the mixing preheater 5 is 100–150℃. The heating temperature of the heating belt is 200–350℃. The connecting pipes between the first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 should be as short as possible. The first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 can be arranged vertically. The type, composition, and function of the denitrification catalyst loaded in the first reactor 1, the second reactor 2, the third reactor 3, and the fourth reactor 4 can be the same or different, depending on the specific purpose of the test experiment.
[0029] The first reactor 1 is equipped with a valve 18 on the series pipeline and a valve 19 on the parallel pipeline, and the valve 18 on the series pipeline and the valve 19 on the parallel pipeline are not opened or closed at the same time.
[0030] The second reactor 2 is equipped with a valve 20 on the series pipeline and a valve 21 on the parallel pipeline, and the valve 20 on the series pipeline and the valve 21 on the parallel pipeline are not opened or closed at the same time.
[0031] The third reactor 3 is equipped with a valve 22 on the series pipeline and a valve 23 on the parallel pipeline, and the valve 22 on the series pipeline and the valve 23 on the parallel pipeline are not opened or closed at the same time.
[0032] The outlet pipeline of the fourth reactor 4 is connected to the parallel pipelines of other reactors, and a valve 24 is installed on the outlet pipeline.
[0033] Example 3
[0034] The air inlet ports include a first air inlet, a second air inlet, a third air inlet, and a fourth air inlet, sequentially arranged upstream of the mixing preheater 5. The first air inlet is connected to N2, the second to O2, the third to NO, and the fourth to SO2. The air inlet ports also include a fifth air inlet located downstream of the mixing preheater 5, which is connected to NH3. Valves and flow meters are respectively installed on the first, second, third, fourth, and fifth air inlets. The liquid inlet port is connected to H2O and is connected to a valve and a pump 6.
[0035] Specifically, a branch pipe is connected to the first air intake port, and a valve 7 and a flow meter 12 are installed on the branch pipe; a branch pipe is connected to the second air intake port, and a valve 8 and a flow meter 13 are installed on the branch pipe; a branch pipe is connected to the third air intake port, and a valve 9 and a flow meter 14 are installed on the branch pipe; a branch pipe is connected to the fourth air intake port, and a valve 10 and a flow meter 15 are installed on the branch pipe; a branch pipe is connected to the fifth air intake port, and a valve 16 and a flow meter 17 are installed on the branch pipe.
[0036] The first, second, third, and fourth air inlets can be flexibly adjusted via valves to supply gas (N2, O2, NO, SO2), depending on the specific purpose of the test experiment; the gas supply can be measured using a flow meter. The fifth air inlet provides NH3 as the reaction gas.
[0037] The liquid inlet is connected to valve 11 and pump 6, and pump 6 provides H2O as a reactant.
[0038] When used for activity testing of denitrification catalysts, this invention includes the following steps:
[0039] (1) V2O5-WO3 / TiO2 catalyst is loaded into the first reactor 1, the second reactor 2, the third reactor 3 and the fourth reactor 4;
[0040] (2) Turn on the heating of the mixing preheater 5 and control the temperature at 120℃;
[0041] (3) Turn on the heating of the first reactor 1, the second reactor 2, the third reactor 3 and the fourth reactor 4, and control the temperature at 360°C. Turn on the heating tape and control the temperature at 250°C.
[0042] (4) Open valves 7, 8, 9, 10 and 11 to inject reaction gas into the mixing preheater 5;
[0043] (5) Open valve 16 and inject NH3 into the first reactor 1;
[0044] (6) Close valves 18, 21, 23 and 24, open valve 19, and test the denitrification efficiency of the denitrification catalyst in the first stage reactor.
[0045] (7) Close valves 19, 20 and 24, open valve 21, and test the denitrification efficiency of the denitrification catalyst in the two reactors.
[0046] (8) Close valves 19, 21, and 24, and open valves 18, 20, and 23 to test the denitrification efficiency of the denitrification catalyst in the three-stage reactor.
[0047] (9) Close valves 19, 21 and 23, and open valves 18, 20, 22 and 24 to test the denitrification efficiency of the denitrification catalyst in the four-stage reactor.
[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that 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 therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A testing apparatus for a laboratory denitrification catalyst, characterized in that, include: At least two reactors, which are connected in series; The main pipeline is provided with multiple air inlets, liquid inlets and a mixing preheater, and is connected to the first reactor in series.
2. The testing apparatus for laboratory denitrification catalysts according to claim 1, characterized in that, The reactor comprises a first reactor, a second reactor, a third reactor, and a fourth reactor connected in series, and the main pipeline is connected to the first reactor.
3. The testing apparatus for laboratory denitrification catalysts according to claim 2, characterized in that, The connecting pipeline between the mixing preheater, the first reactor, the second reactor, the third reactor, and the fourth reactor is equipped with a heating belt for heat tracing.
4. The testing apparatus for laboratory denitrification catalyst according to claim 2, characterized in that, Valves are provided on the series pipeline connecting the first reactor, the second reactor, the third reactor, and the fourth reactor.
5. The testing apparatus for laboratory denitrification catalysts according to claim 2, characterized in that, The first reactor, the second reactor, the third reactor, and the fourth reactor are connected in parallel at one end, and valves are provided on the parallel pipeline.
6. The testing apparatus for laboratory denitrification catalyst according to claim 2, characterized in that, The air intake ports include a first air intake port, a second air intake port, a third air intake port, and a fourth air intake port, which are arranged sequentially on the upstream side of the mixing preheater.
7. The testing apparatus for laboratory denitrification catalyst according to claim 6, characterized in that, The first air intake port is connected to N2, the second air intake port is connected to O2, the third air intake port is connected to NO, and the fourth air intake port is connected to SO2.
8. The testing apparatus for laboratory denitrification catalysts according to claim 6, characterized in that, The air intake interface also includes a fifth air intake interface located downstream of the mixing preheater, which is connected to NH3.
9. The testing apparatus for laboratory denitrification catalysts according to claim 8, characterized in that, Valves and flow meters are respectively provided on the first air intake port, the second air intake port, the third air intake port, the fourth air intake port and the fifth air intake port.
10. The testing apparatus for laboratory denitrification catalysts according to claim 1, characterized in that, The liquid inlet is connected to H2O, and a valve and a pump are connected to the liquid inlet.