Preparation system of copper-based low-temperature denitration catalyst
By combining a multi-tandem reactor and a spray drying device, the uniformity and performance issues of copper-based low-temperature denitrification catalysts in large-scale production were solved, achieving efficient catalyst preparation suitable for denitrification in low-temperature flue gas environments.
Patent Information
- Application Number
- CN202520208892.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-10
AI Technical Summary
In large-scale production, existing copper-based low-temperature denitration catalysts suffer from challenges in ensuring catalyst uniformity, particle size distribution, and denitration performance, indicating that the preparation technology is immature.
A continuous process was adopted, using multiple reactors connected in series and a spray drying device, combined with precise temperature control and pH adjustment, to prepare a copper-based low-temperature denitration catalyst, ensuring the stability and uniformity of the catalyst.
It improves the production efficiency and performance of the catalyst, ensuring that the catalyst has excellent denitrification effect in low-temperature flue gas environment, making it suitable for industrial applications.
Smart Images
Figure CN223887988U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the preparation technical field of denitration catalyst, especially to a preparation system of copper-based low-temperature denitration catalyst. BACKGROUND
[0002] With the increasingly serious problem of air pollution, the importance of denitration technology in the industrial field is increasingly prominent. The traditional vanadium-titanium-based denitration catalyst has high denitration efficiency, but its effective working temperature range is 320~420 DEG C, and the effect is poor in the low-temperature flue gas environment. Therefore, the development of low-temperature denitration catalyst, especially copper-based catalyst, has become a research hotspot in recent years. Copper-based low-temperature denitration catalyst has high low-temperature activity, especially in the range of 180~350 DEG C, and has excellent conversion effect on NOx.
[0003] However, the industrialization preparation technology of copper-based low-temperature denitration catalyst is not mature at present, especially in the large-scale production process, how to ensure the uniformity, particle size distribution and denitration performance of the catalyst has been a technical problem. In view of this problem, it is necessary to develop a preparation system of copper-based low-temperature denitration catalyst. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a preparation system of copper-based low-temperature denitration catalyst, which can effectively improve the production efficiency and stability of the catalyst and ensure the performance of the catalyst.
[0005] According to the purpose of the utility model, the utility model provides a preparation system of copper-based low-temperature denitration catalyst, which comprises a first liquid storage tank, a second liquid storage tank, a first reaction kettle, a second reaction kettle, a third reaction kettle and a spray drying device, the first liquid storage tank and the second liquid storage tank are connected with the first reaction kettle respectively, and the first reaction kettle, the second reaction kettle, the third reaction kettle and the spray drying device are connected in sequence.
[0006] Further, the first liquid storage tank is used for storing the mixed solution of copper nitrate and additives required for reaction, the additive is one of cerium nitrate, iron nitrate and manganese nitrate, and the molar ratio of additive elements to Cu is 1:1~1:5.
[0007] Further, the second liquid storage tank is used for storing ammonium carbonate solution required for reaction.
[0008] Further, the first liquid storage tank is connected with a first pump and a first valve, and the second liquid storage tank is connected with a second pump and a second valve.
[0009] Further, the first pump and the second pump control the flow to stabilize the pH value of the materials in the first reaction kettle, the second reaction kettle and the third reaction kettle at 7.5~9.
[0010] Further, the first reaction kettle is installed with a first overflow port, the second reaction kettle is installed with a second overflow port, the third reaction kettle is installed with a third overflow port, the solution in the first reaction kettle enters the second reaction kettle through the first overflow port, the material in the second reaction kettle enters the third reaction kettle through the second overflow port, and the solution reacted in the third reaction kettle enters a spray drying device through the third overflow port.
[0011] Further, the bottom of the spray drying device is provided with a discharge bottom valve.
[0012] Further, the first reaction kettle, the second reaction kettle and the third reaction kettle are provided with heating jackets to control the temperature, and the heating temperature of the first reaction kettle, the second reaction kettle and the third reaction kettle is maintained at 50-80 DEG C.
[0013] Further, the first reaction kettle is installed with a first stirrer, the second reaction kettle is installed with a second stirrer, and the third reaction kettle is installed with a third stirrer, and the rotating speed of the first stirrer, the second stirrer and the third stirrer is 500-1000 rpm.
[0014] Further, the bottom of the first reaction kettle is installed with a first bottom valve, the bottom of the second reaction kettle is installed with a second bottom valve, and the bottom of the third reaction kettle is installed with a third bottom valve.
[0015] The technical scheme of the utility model adopts a continuous process flow, greatly improves the production efficiency, and the multi-kettle series process, accurate temperature control, PH value adjustment and spray drying process can guarantee the stability of the catalyst product, the catalyst particle size distribution obtained through the spray drying is uniform, the production efficiency of the catalyst can be greatly improved, the performance of the catalyst is excellent, and the catalyst is suitable for a low-temperature flue gas environment. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0017] Figure 1 It is a structural schematic view of the embodiment of the utility model;
[0018] In the figure: 1, the first stirrer; 2, the second stirrer; 3, the third stirrer; 4, the first reaction kettle; 5, the second reaction kettle; 6, the third reaction kettle; 7, the first overflow; 8, the second overflow; 9, the third overflow; 10, the first bottom valve; 11, the second bottom valve; 12, the third bottom valve; 13, the spray drying device; 14, the discharge bottom valve; 15, the first liquid storage tank; 16, the second liquid storage tank; 17, the first pump; 18, the second pump; 19, the first valve; 20, the second valve. DETAILED DESCRIPTION
[0019] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0020] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0021] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", and "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0022] Embodiment 1
[0023] As Figure 1 shown:
[0024] The application discloses a preparation system of a copper-based low-temperature denitration catalyst.
[0025] The first liquid storage tank 15 and the second liquid storage tank 16 are respectively used for storing solution raw materials, the first liquid storage tank 15 is used for storing a mixed solution of copper nitrate and an additive required for reaction, the additive is one of cerium nitrate, iron nitrate and manganese nitrate, and the molar ratio of the additive element to Cu is 1:1-1:5; and the second liquid storage tank 16 is used for storing an ammonium carbonate solution required for reaction.
[0026] The first liquid storage tank 15 and the second liquid storage tank 16 are respectively connected with the first reaction kettle 4, the first liquid storage tank 15 is connected with a first pump 17 and a first valve 19, and the second liquid storage tank 16 is connected with a second pump 18 and a second valve 20. The first pump 17 and the second pump 18 are used for pumping the solutions in the corresponding liquid storage tanks into the first reaction kettle 4, and the first valve 19 and the second valve 20 are used for regulating the flow of the solutions. By controlling the flow of the first pump 17 and the second pump 18, the pH value of the materials in the first reaction kettle 4, the second reaction kettle 5 and the third reaction kettle 6 can be stabilized at 7.5-9.
[0027] The first reaction kettle 4 is provided with a first overflow port 7, the second reaction kettle 5 is provided with a second overflow port 8, and the third reaction kettle 6 is provided with a third overflow port 9, and the first overflow port 7, the second overflow port 8 and the third overflow port 9 are used for the flow of reaction materials.
[0028] The solution in the first reaction kettle 4 enters the second reaction kettle 5 through the first overflow port 7, the material in the second reaction kettle 5 enters the third reaction kettle 6 through the second overflow port 8, and the reacted solution enters the spray drying device 13 through the third overflow port 9. The spray drying device 13 is used for drying the reacted solution to obtain a powder catalyst. The spray drying device 13 can convert the wet material into a powder catalyst with uniform particle size distribution. The bottom of the spray drying device 13 is provided with a discharge bottom valve 14, and the powder catalyst in the spray drying device 13 can be discharged through the discharge bottom valve 14.
[0029] The first reaction kettle 4, the second reaction kettle 5 and the third reaction kettle 6 are used for sequentially completing the reaction process of the catalyst. Heating jackets are arranged in the first reaction kettle 4, the second reaction kettle 5 and the third reaction kettle 6 to control the temperature. The heating temperature of the first reaction kettle 4, the second reaction kettle 5 and the third reaction kettle 6 can be maintained at 50-80 DEG C through the heating jackets. The connecting pipelines between the first reaction kettle 4, the second reaction kettle 5 and the third reaction kettle 6 are all provided with heat preservation devices.
[0030] The first reaction kettle 4 is provided with the first stirrer 1, the second reaction kettle 5 is provided with the second stirrer 2, and the third reaction kettle 6 is provided with the third stirrer 3; the first stirrer 1, the second stirrer 2 and the third stirrer 3 are used for stirring the solution in the corresponding reaction kettle respectively, so that the uniformity of the reaction process is ensured; and the rotating speed of the first stirrer 1, the second stirrer 2 and the third stirrer 3 is 500-1000 rpm.
[0031] The bottom of the first reaction kettle 4 is provided with the first bottom valve 10, the bottom of the second reaction kettle 5 is provided with the second bottom valve 11, and the bottom of the third reaction kettle 6 is provided with the third bottom valve 12; the first bottom valve 10, the second bottom valve 11 and the third bottom valve 12 are used for discharging the materials in the corresponding reaction kettle.
[0032] The device comprises a continuous catalyst preparation system, and the catalyst can be prepared efficiently through the series connection of the reaction kettles; and the materials after the reaction can be dried into powder through the spray drying device.
[0033] In use, the device has the following steps:
[0034] Deionized water is added into the first reaction kettle 4, the second reaction kettle 5 and the third reaction kettle 6 as a basic solution, and the temperature is increased to 50 DEG C by starting the heating jacket;
[0035] The first stirrer 1, the second stirrer 2 and the third stirrer 3 are started, and the rotating speed is controlled at 800 rpm, so that the solution is uniformly mixed;
[0036] The copper nitrate solution in the first liquid storage tank 15 and the ammonium carbonate solution in the second liquid storage tank 16 are simultaneously injected into the first reaction kettle 4 through the first pump 17 and the second pump 18 respectively, and the pH value in the reaction kettle is controlled at 8;
[0037] The solution in the first reaction kettle 4 enters the second reaction kettle 5 through the first overflow port 7, and the materials in the second reaction kettle 5 enter the third reaction kettle 6 through the second overflow port 8;
[0038] The solution after the reaction enters the spray drying device 13 through the third overflow port 9, is subjected to drying treatment, and powder catalyst is obtained; finally, the solid catalyst in the spray drying device 13 is unloaded through the discharge bottom valve 14, and the final powder is collected through the spray drying device.
[0039] In the use process, after the solutions in the first liquid storage tank 15 and the second liquid storage tank 16 are injected, the first pump 17, the second pump 18, the first valve 19 and the second valve 20 are closed, and the first stirrer 1, the second stirrer 2 and the third stirrer 3 are closed; the first bottom valve 10, the second bottom valve 11 and the third bottom valve 12 are opened, and the materials in the reaction kettle are unloaded.
[0040] The temperature of the solution in the reaction kettle is controlled at 50-80 DEG C, the pH value in the reaction process is stabilized at 7.5-9, and the temperature of the spray drying is controlled at 60-80 DEG C, so that the good particle size distribution of the catalyst is ensured.
[0041] The preparation system of the copper-based low-temperature denitration catalyst has the advantages of innovation and feasibility, and through reasonable system design and process flow, the production efficiency and stability of the catalyst are improved.
[0042] The preparation system of the copper-based low-temperature denitration catalyst has the advantages of innovation and feasibility, and through reasonable system design and process flow, the production efficiency and stability of the catalyst are improved.
[0043] The preparation system of the copper-based low-temperature denitration catalyst has the advantages of innovation and feasibility, and through reasonable system design and process flow, the production efficiency and stability of the catalyst are improved.
[0044] The preparation system of the copper-based low-temperature denitration catalyst has the advantages of innovation and feasibility, and through reasonable system design and process flow, the production efficiency and stability of the catalyst are improved.
[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A preparation system for a copper-based low-temperature denitration catalyst, characterized in that, It includes a first liquid storage tank, a second liquid storage tank, a first reaction vessel, a second reaction vessel, a third reaction vessel, and a spray drying device. The first liquid storage tank and the second liquid storage tank are respectively connected to the first reaction vessel, and the first reaction vessel, the second reaction vessel, the third reaction vessel, and the spray drying device are connected in sequence.
2. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The first storage tank is used to store a mixed solution of copper nitrate and additives required for the reaction.
3. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The second storage tank is used to store the ammonium carbonate solution required for the reaction.
4. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The first liquid storage tank is connected to a first pump and a first valve, and the second liquid storage tank is connected to a second pump and a second valve.
5. The preparation system for the copper-based low-temperature denitration catalyst according to claim 4, characterized in that, The first pump and the second pump control the flow rate to stabilize the pH value of the materials in the first reactor, the second reactor and the third reactor at 7.5~9.
6. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The first reactor is equipped with a first overflow port, the second reactor is equipped with a second overflow port, and the third reactor is equipped with a third overflow port. The solution in the first reactor enters the second reactor through the first overflow port, the material in the second reactor enters the third reactor through the second overflow port, and the solution after reaction in the third reactor enters the spray drying device through the third overflow port.
7. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The bottom of the spray drying device is equipped with a discharge valve.
8. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The first, second, and third reaction vessels are equipped with heating jackets to control the temperature, and the heating temperature of the first, second, and third reaction vessels is maintained at 50~80℃.
9. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The first reactor is equipped with a first stirrer, the second reactor is equipped with a second stirrer, and the third reactor is equipped with a third stirrer. The rotation speed of the first stirrer, the second stirrer, and the third stirrer is 500~1000 rpm.
10. The preparation system for the copper-based low-temperature denitration catalyst according to claim 1, characterized in that, The first reactor is equipped with a first bottom valve, the second reactor is equipped with a second bottom valve, and the third reactor is equipped with a third bottom valve.