Carbon-based flue gas denitration catalyst and preparation method thereof

Abstract

The invention provides a carbon-based flue gas denitration catalyst and a preparation method thereof, and belongs to the field of flue gas denitration, and the preparation method of the carbon-based flue gas denitration catalyst comprises the specific steps of material weighing, activated carbon treatment, mixing and stirring, gas calcination and pressure filling. The reasonable preparation technology is provided, in the preparation process, after the treated materials are ground in the step 3, the situation that blocky materials exist in the materials, the preparation efficiency is affected, and the use effect of the prepared catalyst is affected is prevented; meanwhile, in the preparation process, the internal pressure of the container is increased through the third step in the fifth step, so that the material and hydrogen peroxide are subjected to pressure mixing, and then the internal pressure of the container is increased during filling and sealing in the fourth step, so that the spraying work in the catalyst use process is realized, and the purpose of improving the use effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas denitrification, and particularly relates to a carbon-based flue gas denitrification catalyst and a preparation method thereof. Background Art

[0002] Flue gas pollutant emission control technologies are mainly aimed at reducing the large emissions of SO2 and NOx in industrial flue gas, so as to reduce the damage to the environment caused by pollutants emitted during industrial development. In flue gas pollutant emission control technologies, SO2 removal technologies mainly include limestone-gypsum method, ammonia method, circulating fluidized bed method (CFB), etc.; NOx removal technologies mainly include selective catalytic reduction method (SCR), selective non-catalytic reduction method (SNCR), oxidation absorption method, etc. Existing catalysts and their preparation methods cannot improve the use effect of the catalyst by increasing pressure during use, and the problem that the massive materials in the materials during the preparation process are likely to affect the preparation and use effects of the catalyst during use. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a carbon-based flue gas denitrification catalyst and a preparation method thereof. By setting a pressurization step during the filling of the catalyst container during the preparation process, the use effect of the catalyst is improved, and a screening and grinding mechanism is set during the preparation process to prevent the massive materials in the materials from affecting the preparation and use effects of the catalyst.

[0004] A carbon-based flue gas denitrification catalyst includes: 6.0-8.0% of manganese dioxide, 0.5-1.5% of iron oxide, 0.3-1.0% of cerium dioxide, 90-94% of modified activated carbon, and 1.5-3.0% of hydrogen peroxide;

[0005] A preparation method of a carbon-based flue gas denitrification catalyst:

[0006] Step 1: Weigh the ingredients. Weigh manganese dioxide, iron oxide, cerium dioxide, modified activated carbon, and hydrogen peroxide that need to be used respectively;

[0007] Step 2: Treat the activated carbon. Perform modification treatment on the activated carbon that needs to be used during the preparation process;

[0008] In Step 2, in the first step of impregnation, use the mixed liquid to impregnate the materials;

[0009] In the second step, drying. After impregnation, use a drying tool to dry the materials;

[0010] Step 3: Mix and stir. Mix and stir the treated and proportionally weighed materials;

[0011] In step three, in the first step, proportion and weigh. Place the prepared materials on a suitable weighing device to conduct the material weighing and proportioning work;

[0012] In the second step, grind. After conducting the weighing and proportioning, use a grinding tool to grind the materials to prevent lumps in the materials from affecting the preparation efficiency and effect;

[0013] In the third step, conduct secondary mixing. Use a weighing tool to conduct the weighing and batching work on the ingredients to be added. After adding the ingredients, use a stirring and mixing tool to conduct the secondary mixing and stirring work;

[0014] In the fourth step, screen. After conducting the stirring and mixing, use a screening tool to screen the materials;

[0015] Step four: Gas calcination. Transport the mixed materials to the interior of a suitable device, and then use inert gas and air gas to conduct the calcination work;

[0016] Step five: Pressure filling. After preparing the materials, use a filling device to conduct the filling work. After filling, use a pressure device to inject hydrogen peroxide into the interior of the catalyst container. By increasing the pressure, make the hydrogen peroxide mix with the materials to form a catalyst;

[0017] In step five, in the first step, select a device. According to the preparation requirements, select a suitable filling device to facilitate the preparation and filling work;

[0018] In the second step, fill the materials. Place the prepared materials inside the filling device, and then transport the materials to the interior of the container through the filling device;

[0019] In the third step, increase the pressure. After filling the materials, place the container in a suitable position of the pressure increasing device, and then through the pressure increasing device, conduct the hydrogen peroxide filling work into the interior of the container. At the same time, by increasing the pressure, achieve the mixed filling of the materials;

[0020] In the fourth step, seal the filling. After conducting the hydrogen peroxide pressure filling, use a packaging tool to conduct the container packaging work, thereby completing the preparation work of the carbon-based flue gas denitrification catalyst.

[0021] Preferably, during the second drying step in step two, control the temperature between two hundred degrees and four hundred degrees.

[0022] Preferably, during the gas calcination in step four, control the temperature between four hundred degrees and seven hundred degrees.

[0023] Preferably, in the third secondary mixing step in step three, control the stirring speed during the stirring and mixing process between six hundred and nine hundred r / min, and control the stirring time between ten hours and eighteen hours.

[0024] Preferably, when increasing the pressure in the third step of step five, the pressure is controlled between three pascals and six pascals.

[0025] Preferably, when filling and sealing in the fourth step of step five, the pressure is controlled between two pascals and five pascals.

[0026] Compared with the prior art, the present invention has the following beneficial effects: Since a carbon-based flue gas denitration catalyst and its preparation method of the present invention are widely used in the field of flue gas denitration. The present invention provides a reasonable preparation process. During the preparation process of the present invention, after grinding the treated materials in step three, it is possible to prevent the presence of blocky materials in the materials, which affect the preparation efficiency and the use effect of the catalyst after preparation. At the same time, during the preparation process, in step five, by increasing the internal pressure of the container in the third step, the materials are pressure-mixed with hydrogen peroxide, and then by increasing the internal pressure of the container during filling and sealing in the fourth step, the spraying work during the use of the catalyst is realized, achieving the purpose of improving the use effect. Description of the Drawings

[0027] Figure 1 is the flow chart of the carbon-based flue gas denitration catalyst and its preparation method.

[0028] Figure 2 is the flow chart of the activated carbon treatment.

[0029] Figure 3 is the flow chart of the mixing and stirring.

[0030] Figure 4 is the flow chart of the pressure filling. Detailed Embodiments

[0031] The following further describes the present invention with reference to the accompanying drawings:

[0032] In the figure:

[0033] As shown in the Figures 1 to 4 accompanying

[0034] A carbon-based flue gas denitration catalyst includes: manganese dioxide 6.0 - 8.0%, iron oxide 0.5 - 1.5%, cerium dioxide 0.3 - 1.0%, modified activated carbon 90 - 94%, hydrogen peroxide 1.5 - 3.0%;

[0035] A preparation method of a carbon-based flue gas denitration catalyst:

[0036] S101: Weighing the ingredients, respectively weighing manganese dioxide, iron oxide, cerium dioxide, modified activated carbon, and hydrogen peroxide that need to be used;

[0037] S102: Activated carbon treatment, performing modification treatment on the activated carbon that needs to be used in the preparation process;

[0038] In S102, S201 impregnation is carried out, using the well-mixed liquid to impregnate the material;

[0039] S202, drying. After impregnation, use a drying tool to dry the material;

[0040] S103: Mixing and stirring. Mix and stir the processed and proportioned and weighed materials;

[0041] In S103, S301 proportioning and weighing. Put the prepared materials on a suitable weighing device to carry out the material weighing and proportioning work;

[0042] S302, grinding. After weighing and proportioning, use a grinding tool to grind the materials to prevent lumps in the materials from affecting the preparation efficiency and effect;

[0043] S303, secondary mixing. Use a weighing tool to weigh and prepare the ingredients to be added. After adding the ingredients, use a stirring and mixing tool to carry out secondary mixing and stirring;

[0044] S304, screening. After stirring and mixing, use a screening tool to screen the materials;

[0045] S104: Gas calcination. Transport the mixed materials to the inside of a suitable device, and then use inert gas and air gas to carry out the calcination work;

[0046] S105: Pressure filling. After preparing the materials, use a filling device to carry out the filling work. After filling, use a pressure device to inject hydrogen peroxide into the inside of the catalyst container. By increasing the pressure, the hydrogen peroxide is mixed with the materials to form a catalyst;

[0047] In S105, S501 select the device. According to the preparation requirements, select a suitable filling device to facilitate the preparation and filling work;

[0048] S502 fill the material. Put the prepared materials into the inside of the filling device, and then transport the materials to the inside of the container through the filling device;

[0049] S503 increase the pressure. After filling the material, place the container in a suitable position of the pressurizing device, and then through the pressurizing device, carry out the hydrogen peroxide filling work into the inside of the container. At the same time, by increasing the pressure, the material mixing and filling are realized;

[0050] S504 filling and sealing. After the hydrogen peroxide pressure filling, use a packaging tool to carry out the container packaging work, thus completing the preparation work of the carbon-based flue gas denitrification catalyst.

[0051] Preferably, during the drying process of S202 in S102, the temperature is controlled between two hundred degrees and four hundred degrees.

[0052] Preferably, during the gas calcination process in S14, the temperature is controlled between four hundred degrees and seven hundred degrees.

[0053] Preferably, in the secondary mixing of S303 in S103, the stirring speed during the stirring and mixing process is controlled at six hundred to nine hundred r / min, and the stirring time is controlled between ten hours and eighteen hours.

[0054] Preferably, when increasing the pressure in S503 of S105, the pressure is controlled between three pascals and six pascals.

[0055] Preferably, when filling and sealing in S504 of S105, the pressure is controlled between two pascals and five pascals.

[0056] Specific implementation examples

[0057] Example 1: When preparing, use a weighing tool to weigh and proportion the materials, and perform impregnation work on the materials after weighing and proportioning. After impregnation, perform material drying work. Then, re-weigh and proportion the processed materials, and perform material grinding work after weighing and proportioning. Then, perform secondary mixing work on the ground materials, and perform stirring work during the mixing of the materials. After mixing the materials, use a screening tool to perform screening work to prevent massive materials in the materials from affecting the preparation efficiency and the usage effect of the prepared catalyst. Then, according to needs, select a suitable filling device to perform material filling work on the processed materials, and use a pressurizing device to pressurize the inside of the container after filling, and add hydrogen peroxide during the pressurization process to achieve material mixing work through pressure. Then, increase the pressure inside the container during the encapsulation process to facilitate improving the usage effect of the catalyst during use, thereby completing the catalyst preparation work.

Claims

1. A carbon-based flue gas denitrification catalyst and its preparation method, characterized in that, This carbon-based flue gas denitrification catalyst comprises: 6.0 - 8.0% of manganese dioxide, 0.5 - 1.5% of iron oxide, 0.3 - 1.0% of cerium dioxide, 90 - 94% of modified activated carbon, and 1.5 - 3.0% of hydrogen peroxide.

2. A carbon-based flue gas denitration catalyst and its preparation method, characterized in that, A preparation method of a carbon-based flue gas denitrification catalyst: Step 1: Weigh the ingredients. Weigh manganese dioxide, iron oxide, cerium dioxide, modified activated carbon, and hydrogen peroxide that need to be used respectively. Step 2: Treat the activated carbon. Conduct modification treatment on the activated carbon to be used in the preparation process. In Step 2, the first step is impregnation. Use the prepared mixture to impregnate the material. The second step is drying. After impregnation, use a drying tool to dry the material. Step 3: Mix and stir. Mix and stir the treated and proportionally weighed materials. In Step 3, the first step is proportioning and weighing. Put the prepared materials on a suitable weighing device to conduct material weighing and proportioning. The second step is grinding. After weighing and proportioning, use a grinding tool to grind the materials to prevent the existence of lumps in the materials from affecting the preparation efficiency and effect. The third step is secondary mixing. Use a weighing tool to weigh and proportion the ingredients to be added. After adding the ingredients, use a stirring and mixing tool to conduct secondary mixing and stirring. The fourth step is screening. After stirring and mixing, use a screening tool to screen the materials. Step 4: Gas calcination. Transport the mixed materials to the interior of a suitable device, and then conduct calcination using inert gas and air. Step 5: Pressure filling. After preparing the materials, use a filling device to conduct filling work. After filling, use a pressure device to inject hydrogen peroxide into the interior of the catalyst container. By increasing the pressure, make hydrogen peroxide mix with the materials to form a catalyst. In Step 5, the first step is to select the device. According to the preparation requirements, select a suitable filling device to facilitate the preparation and filling work. The second step is to fill the materials. Put the prepared materials into the interior of the filling device, and then transport the materials to the interior of the container through the filling device. The third step is to increase the pressure. After filling the materials, place the container at a suitable position of the pressure increasing device, and then through the pressure increasing device, conduct hydrogen peroxide filling work into the interior of the container. At the same time, by increasing the pressure, achieve material mixing and filling. The fourth step is filling and sealing. After hydrogen peroxide pressure filling, use a sealing tool to conduct container sealing work, thus completing the preparation work of the carbon-based flue gas denitrification catalyst.

3. The carbon-based flue gas denitration catalyst and its preparation method according to claim 2, characterized in that, During the second step of drying in Step 2, control the temperature between 200 °C and 400 °C.

4. The carbon-based flue gas denitrification catalyst and its preparation method according to claim 2, characterized in that, During the gas calcination in Step 4, control the temperature between 400 °C and 700 °C.

5. The carbon-based flue gas denitration catalyst and its preparation method according to claim 2, characterized in that, In the third step of secondary mixing in Step 3, control the stirring speed during the stirring and mixing process between 600 and 900 r / min, and control the stirring time between 10 hours and 18 hours.

6. The carbon-based flue gas denitration catalyst and its preparation method according to claim 2, characterized in that, When increasing the pressure in the third step of Step 5, control the pressure between 3 Pa and 6 Pa.

7. The carbon-based flue gas denitration catalyst and its preparation method according to claim 2, characterized in that, When conducting filling and sealing in the fourth step of Step 5, control the pressure between 2 Pa and 5 Pa.

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