CN117164353A - High-thermal-shock purification VOCs honeycomb ceramic carrier and preparation method and application thereof - Google Patents
High-thermal-shock purification VOCs honeycomb ceramic carrier and preparation method and application thereof Download PDFInfo
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a high thermal shock purifying VOCs honeycomb ceramic carrier and a preparation method and application thereof, wherein the preparation steps are as follows: crushing cordierite cooked blank, screening after crushing, selecting the screened cooked blank powder as powder A, crushing the cut green blank leftovers, screening after crushing, and selecting the screened green blank powder as powder B; mixing the powder A and the powder B to obtain a mixture C, adding a binder and a sintering aid into the mixture C, and uniformly mixing to obtain a mixture D; adding the mixture D into glycerol, white oil and water and kneading the mixture together to form a block material; preparing the block material into block mud segments, sieving the mud segments on an extruder to remove impurities to obtain the impurity-removed mud segments, extruding the impurity-removed mud segments through a die to obtain a honeycomb ceramic biscuit, and drying, cutting and sintering the honeycomb ceramic biscuit to obtain the ceramic honeycomb carrier. The preparation cost is low, and the thermal shock stability of the prepared ceramic honeycomb carrier is good.
Description
Technical Field
The invention belongs to the technical field of ceramics, and particularly relates to a high thermal shock purifying VOCs honeycomb ceramic carrier and a preparation method and application thereof.
Background
Organic waste gas (VOCs) mainly comes from industries such as petrochemical industry, printing industry, coal exploitation industry, electronic industry and the like, and main volatile matters include waste methane aromatic hydrocarbon, ketone, methyl isobutyl ketone, benzene, toluene, xylene, isopropanol, carbon tetrachloride, methanol, n-hexane, butanone, chloroform and acetic acid. Ethyl acetate, and the like. VOCs can cause convulsion and coma after being inhaled into human body, hurt liver, kidney, brain and nervous system, and cause serious consequences such as hypomnesis, and the application of the existing VOCs cleaning technology is wider than that of a thermal storage catalytic oxidation technology (RCO). By coating the catalyst on the honeycomb ceramic carrier, the reaction rate of waste gas treatment is improved under the catalytic oxidation effect of the catalyst when waste gas flows through the carrier, and the catalyst can lead organic waste gas to generate anaerobic under the lower ignition temperatureBurning and decomposing into CO 2 And H 2 O emits a large amount of heat, and the expansion coefficient of the honeycomb ceramic carrier is low (less than or equal to 2.0X10) -6 I c), it is important how to realize low-cost production of honeycomb ceramic carrier, and in the existing production process of cordierite honeycomb ceramic, green gaskets need to be covered on the upper and lower surfaces of the product in the green sintering stage, and the process can produce cordierite cooked mats, which are sintered to form cordierite phases, so that the carrier cannot be recovered and prepared by the method disclosed in the document CN115893983a "method for preparing honeycomb ceramic carrier by green recycling of honeycomb ceramic carrier and carrier", which finally form solid wastes, and the thermal expansion coefficient of the solid wastes is low (less than or equal to 1.0x10) -6 High cordierite phase content (more than or equal to 90 percent), and how to recycle the cordierite phase to realize recycling of solid wastes is also important.
Disclosure of Invention
In order to achieve the above object, the present invention aims to provide a method for preparing a high thermal shock purifying VOCs honeycomb ceramic carrier, which can recycle the green solid waste material generated during the production of cordierite honeycomb ceramic to prepare a high thermal shock purifying VOCs honeycomb ceramic carrier with relatively low performance requirements.
In order to achieve the above object, the technical scheme of the present invention is as follows: a preparation method of a honeycomb ceramic carrier for purifying VOCs by high thermal shock comprises the following steps:
step 1: crushing cordierite cooked blank, screening after crushing, selecting the screened cooked blank powder as powder A, crushing the cut green blank leftovers, screening after crushing, and selecting the screened green blank powder as powder B;
step 2: mixing the powder A and the powder B obtained in the step 1 to obtain a mixture C, adding a binder and a sintering aid into the mixture C, and uniformly mixing to obtain a mixture D;
step 3: adding glycerol, white oil and water into the mixture D obtained in the step 2 and kneading the mixture D into a block material;
step 4: preparing the block materials obtained in the step 3 into block-shaped mud segments, and sieving the mud segments on an extruder to remove impurities to obtain the impurity-removed mud segments;
step 5: extruding the mud section with the impurities removed in the step 4 through a die to obtain a honeycomb ceramic biscuit, drying the honeycomb ceramic biscuit, and cutting the dried honeycomb ceramic biscuit;
step 6: and (5) sintering the cut ceramic honeycomb biscuit obtained in the step (5) to obtain the ceramic honeycomb carrier.
In the technical scheme, the number of the sieved crushed cordierite cooked blank in the step 1 is 180 meshes; the number of the sieved crushed green scraps is 60 meshes.
In the above technical scheme, the cordierite green compact in the step 1 is a green waste product of at least one of a DOC carrier, a DPF carrier, an SCR carrier, an ASC carrier, a TWC carrier and a GPF carrier or a mat used for sintering; the green body offal is offal of at least one of an SCR carrier, a DOC carrier and an ASC carrier with a wall thickness of less than 4 mil.
In the above technical scheme, the addition amount of the binder in the step 2 is 3-6% of the total weight of the mixture C, and the addition amount of the sintering aid is 5-12% of the total weight of the mixture C.
In the technical scheme, the binder is at least one of methylcellulose, hydroxypropyl methylcellulose, carboxymethyl cellulose or hydroxyethyl cellulose, the sintering aid is natural lithium-containing ore powder, the granularity of the sintering aid is 180-mesh screen blanking, and the D50 is 8-15 mu m.
In the above technical scheme, the water in the step 3 is added in an amount of 24-28% of the total weight of the mixture C, the glycerol is added in an amount of 0.1-0.5% of the total weight of the mixture C, and the white oil is added in an amount of 1-3% of the total weight of the mixture C.
In the technical scheme, the block materials in the step 4 are block mud segments manufactured by a vacuum pug mill, wherein the vacuum degree of the vacuum pug mill is-0.07 to-0.095 MPa; the mud section is screened to remove impurities by passing through a 80-mesh screen and a 100-mesh screen successively for at least one time.
In the technical scheme, the sintering period in the step 6 is 40-55h, the sintering temperature is 1230-1250 ℃, and the heat preservation time is 1-4h.
The second purpose of the invention is to provide the honeycomb ceramic carrier for purifying VOCs by high thermal shock, which is prepared by the preparation method.
The invention further aims to provide an application of the prepared high thermal shock purification VOCs honeycomb ceramic carrier as a heat accumulating catalytic oxidizer carrier.
The embodiment of the invention has the beneficial effects that: because the expansion coefficient of the VOCs honeycomb ceramic carrier is lower than that of the cordierite honeycomb ceramic green compact solid waste, the VOCs honeycomb ceramic carrier is prepared by taking the cordierite honeycomb ceramic green compact solid waste as a raw material, so that the recycling of resources can be realized, and the production cost of the VOCs honeycomb ceramic carrier can be reduced; because the mud section of the solid waste of cooked blank preparation is poor in shaping, so this embodiment is with the powder mixing of solid waste of cooked blank and unburned bricks waste material, and the bridging between the granule can be prevented through the space steric hindrance like this, utilizes the high plasticity of unburned bricks itself simultaneously, solves the problem that the mud section of cooked blank is poor in plasticity, and in addition through additionally adding sintering auxiliary agent, can promote the production of liquid phase under lower temperature, bonds cooked blank granule together, solves the problem that cooked blank sintering temperature is high.
Drawings
FIG. 1 is an SEM image of a mat used in green compact sintering after ball milling;
FIG. 2 is an SEM micrograph of a sintered VOCs honeycomb ceramic support of example 4 of the invention;
FIG. 3 is an SEM micrograph of another location of a sintered VOCs honeycomb ceramic support of example 4 of the invention;
fig. 4 is an SEM micrograph of the post-sintered VOCs honeycomb ceramic support of example 4 of the present invention at a location different from that of fig. 2 and 3.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The embodiment of the invention discloses a preparation method of a high thermal shock purification VOCs honeycomb ceramic carrier, which comprises the following steps:
step 1: crushing cordierite green blanks, screening after crushing, selecting undersize green blank powder as powder A, crushing cut green blank leftovers, screening after crushing, and selecting undersize green blank powder as powder B (wherein the manufacturing sequence of the powder A and the powder B is not sequential);
step 2: mixing the powder A and the powder B obtained in the step 1 to obtain a mixture C, adding a binder and a sintering aid into the mixture C, and uniformly mixing to obtain a mixture D;
step 3: adding the mixture D obtained in the step 2 into glycerin, white oil and water and kneading the mixture into a block material together (kneading is carried out by a kneader, and the glycerin, the white oil and the water can be added into the kneader in the kneading process);
step 4: preparing the block materials obtained in the step 3 into block-shaped mud segments, and sieving the mud segments on an extruder to remove impurities to obtain the impurity-removed mud segments;
step 5: extruding the mud section with impurities removed in the step 4 through a die to obtain a honeycomb ceramic biscuit, then drying the honeycomb ceramic biscuit, cutting the dried honeycomb ceramic biscuit [ specifically according to the size of a target product, extruding the mud section with impurities removed in the step 5 through the die to obtain the honeycomb ceramic biscuit with the size of 150mm, the mesh number of 200 meshes and the wall thickness of less than 0.4mm, then drying the honeycomb ceramic biscuit (microwave drying in a microwave mesh belt furnace), cutting the dried honeycomb ceramic biscuit according to a shrinkage ratio scale, and blowing dust in a channel clean;
step 6: sintering the cut ceramic honeycomb biscuit obtained in the step 5 (wherein the scaling amount during later sintering is considered during cutting, and specifically the cutting is performed according to the shrinkage ratio during cutting, so that the product sintered in the later stage can meet the size requirement), and obtaining the ceramic honeycomb carrier after sintering.
In the technical scheme, the number of the sieved crushed cordierite cooked blank in the step 1 is 180 meshes; the number of the crushed green scraps is 60 meshes, and the crushing time of the green scraps in the step 1 is 20-40min by adopting an R19 type inclined mixing mill (the R19 type inclined mixing mill has the advantage of no grinding effect, so that the green scraps can be crushed and the sheet structure of powder in the green can not be damaged).
In the above technical scheme, the cordierite green compact in the step 1 is a green waste product of at least one of a DOC carrier, a DPF carrier, an SCR carrier, an ASC carrier, a TWC carrier and a GPF carrier or a mat used for sintering; the green scrap is a scrap of at least one of SCR, DOC and ASC carriers having a wall thickness of less than 4mil, wherein the term explains: the DOC carrier is an oxidation catalyst carrier, the DPF carrier is a diesel vehicle particle catcher carrier, the SCR carrier is a selective catalytic reduction catalyst carrier, the ASC carrier is an ammonia leakage catalyst carrier, the TWC carrier is a gasoline vehicle three-way catalyst carrier, and the GPF carrier is a gasoline engine particle catcher carrier.
In the above technical scheme, the addition amount of the binder in the step 2 is 3-6% of the total weight of the mixture C, and the addition amount of the sintering aid is 5-12% of the total weight of the mixture C.
In the above technical scheme, the binder is at least one of methylcellulose, hydroxypropyl methylcellulose, carboxymethyl cellulose or hydroxyethyl cellulose, the sintering aid is natural lithium-containing ore powder (such as lepidolite, spodumene, petalite, lithium porcelain stone and other powder, preferably lithium porcelain stone powder), the granularity is 180-mesh screen blanking, and the D50 is 8-15 μm.
In the above technical scheme, the water in the step 3 is added in an amount of 24-28% of the total weight of the mixture C, the glycerol is added in an amount of 0.1-0.5% of the total weight of the mixture C, and the white oil is added in an amount of 1-3% of the total weight of the mixture C.
In the technical scheme, the block materials in the step 4 are block mud segments manufactured by a vacuum pug mill, wherein the vacuum degree of the vacuum pug mill is-0.07 to-0.095 MPa; the mud section is screened to remove impurities by passing through a 80-mesh screen and a 100-mesh screen successively for at least one time.
In the technical scheme, the sintering period in the step 6 is 40-55h, the sintering temperature is 1230-1250 ℃, and the heat preservation time is 1-4h.
Example 1
The embodiment provides a preparation method of a high thermal shock purification VOCs honeycomb ceramic carrier, which comprises the following steps:
ball milling of cooked blank: pulverizing a cordierite cooked blank, sieving the pulverized cordierite cooked blank with a sieve of 180 meshes, selecting powder with D50=5-15 mu m as powder A, wherein the cordierite cooked blank is a cooked waste product of at least one of a DOC carrier, a DPF carrier, an SCR carrier, an ASC carrier, a TWC carrier and a GPF carrier or a cushion used during sintering;
and (3) batching: powder A (since powder B is not added, the total weight of powder A in this example can be regarded as the total weight of mixture C), a binder (hydroxypropyl methylcellulose) and a sintering aid (lithium porcelain powder, particle size 180 mesh screen, D50 8-15 μm) are mixed to obtain a mixture D, wherein the amount of the binder is 5.18% of the total weight of powder A, and the amount of the sintering aid is 15% of the total weight of powder A;
kneading: putting the mixture D into a kneader for kneading, adding 26.39% of water, 0.15% of glycerol and 1.5% of white oil, based on the total weight of the powder A, and kneading into a block;
pugging: putting the block materials into a vacuum pugging machine for vacuum pugging, wherein the vacuum degree is controlled to be-0.07 to-0.095 MPa, and obtaining block mud segments;
sieving: sieving the obtained blocky mud segments on an extruder, wherein the mud segments have poor plasticity due to particle bridging, and the mud segments can be sieved once respectively on a screen mesh of 30 meshes and a screen mesh of 60 meshes at the moment to obtain impurity-removed mud segments;
extrusion: putting the mud section after impurity removal into a vacuum extruder, and extruding a honeycomb ceramic biscuit with the mesh number of 100 meshes and the wall thickness of more than 0.4mm through a die;
and (3) drying: placing the honeycomb ceramic biscuit into a microwave mesh belt furnace for drying;
cutting: cutting the dried honeycomb ceramic biscuit according to the shrinkage ratio, and blowing and dedusting while cutting;
sintering: and (3) stacking the cut ceramic honeycomb biscuit into a kiln for sintering, wherein the sintering period is 40-55h, the sintering temperature is 1230-1250 ℃, and the heat preservation time is 1-4 hours, so that the ceramic honeycomb carrier with the size of 150 x 300mm (the size of the ceramic honeycomb biscuit is calculated according to the product size of 150 x 300mm in the cutting process) is obtained.
The ceramic honeycomb biscuit is square, a small sample can be taken and sintered before extrusion to obtain shrinkage (high shrinkage and width shrinkage) of the corresponding ceramic honeycomb biscuit in advance, wherein the high shrinkage is the shrinkage in the direction of 300mm, the width shrinkage is the shrinkage in the direction of 150mm, the size of the sintered ceramic honeycomb carrier is 150 x 300mm, the size of the ceramic honeycomb biscuit is calculated according to the shrinkage, the die selection of the extrusion step is guided according to the calculated size, the wide side of the ceramic honeycomb biscuit is controlled, and the selection of the cutting length in the cutting step is controlled, so that the size of the ceramic honeycomb biscuit after sintering is 150 x 300mm.
Example 2
The difference from example 1 is that:
the dosage of the binder in the batching step is 4.95 percent of the total weight of the powder A, and the dosage of the sintering aid is 10 percent of the total weight of the powder A;
the amount of water added in the kneading step was 25.63% of the total weight of powder A, respectively.
Example 3
The difference from example 1 is that:
the dosage of the binder in the batching step is 4.86 percent of the total weight of the powder A, and the dosage of the sintering aid is 8 percent of the total weight of the powder A;
the amount of water added in the kneading step was 25.97% of the total weight of powder A, respectively.
Example 4
The difference with embodiment 3 is that the method further comprises the following steps:
crushing and cutting green scraps: pouring the cut green body offcut into an R19 type inclined mixing mill, crushing for 20-40min, sieving the crushed latticed block-shaped material for 60 meshes, and selecting the sieving offcut to obtain powder B, wherein the green body offcut is offcut of at least one of an SCR carrier, a DOC carrier and an ASC carrier with the wall thickness lower than 4 mil;
in addition, in the batching step, powder A and powder B are weighed and mixed according to the mass ratio of 9:1, a mixture C is obtained, and the consumption of the binder is 4.41% of the total weight of the mixture C;
the amounts of water and white oil added in the kneading step were 27.34% and 1.76% of the total weight of the mixture C, respectively;
the mesh numbers of the two screens in the sieving step are 80 meshes and 100 meshes respectively;
the number of the mesh in the extrusion step was 200 mesh.
Example 5
The difference from example 4 is that:
in the batching step, powder A and powder B are weighed and mixed according to the mass ratio of 8:2, a mixture C is obtained, and the consumption of the binder is 3.96% of the total weight of the mixture C;
the amounts of water and white oil added in the kneading step were 26.47% and 1.94% of the total weight of the mixture C, respectively.
Example 6
The difference from example 4 is that:
in the batching step, powder A and powder B are weighed and mixed according to the mass ratio of 7:3, a mixture C is obtained, and the consumption of the binder is 3.51% of the total weight of the mixture C;
the amounts of water and white oil added in the kneading step were 25.54% and 2.12% of the total weight of the mixture C, respectively.
Comparative example 1
The difference from example 1 is that:
the dosage of the binder in the batching step is 4.5 percent of the total weight of the powder A, and no sintering auxiliary agent is added;
the amount of water added in the kneading step was 27.21% of the total weight of powder A, respectively.
Comparative example 2
The difference from example 4 is that:
in the batching step, powder A and powder B are weighed and mixed according to the mass ratio of 9:1 to obtain a mixture C, the dosage of the binder is 4.05 percent of the total weight of the mixture C, and no sintering aid is added;
the amounts of water and white oil added in the kneading step were 26.30% and 1.76% of the total weight of the mixture C, respectively.
The test results of the examples and comparative examples listed in the patent are shown in Table 1
Note that: in order to avoid influencing the extrusion rate under other conditions except for plasticity, the experimental mud segments are extruded and compared under the same conditions (the same pressure, the same die and other factors), wherein the compression resistance A is the compression strength of the A axis, the compression resistance B is the compression strength of the B axis (the A axis is the direction parallel to the pore canal and the B axis is the direction perpendicular to the pore canal), and the measurement methods of the indexes in the table 1 are all the prior art and are not repeated herein.
It can be seen from examples 4-6 and comparative examples 1-2 that the addition of green material (powder B) to the cordierite green compact (powder a) can significantly improve the plasticity of the clay segment, mainly because the flaky structure in powder B acts as steric hindrance and lubricant between the particles of powder a, reduces the probability of bridging between the particles in powder a, and simultaneously, because powder B synthesizes cordierite phase during sintering, has a lower coefficient of thermal expansion, the sintered product can exhibit good thermal shock stability.
It can be seen from examples 1-4 and comparative examples 1-2 that the addition of the sintering aid can exert a sintering-assisting effect, so that the compressive strength of the ceramic honeycomb carrier is remarkably improved, but the excessive addition also increases shrinkage of the product, which has an adverse effect on the control of the product size, and the sintering-assisting effect of the ceramic honeycomb carrier can be confirmed again from comparative examples 1 and 2.
When the ceramic honeycomb carrier is manufactured by completely adopting a cordierite cooked blank (i.e. without adding cutting green scraps, such as in examples 1-3) as a raw material, the ceramic honeycomb carrier is changed into an irregular barren material (such as in figure 1) after being crushed, impurities are easily introduced in the crushing and screening processes, when the powder is directly used for purifying VOCs honeycomb carriers, particles are piled and bridged, the mud section is difficult to screen, the honeycomb ceramic carrier with the wall thickness less than 0.4mm cannot be manufactured, the raw materials are solid wastes, the impurities are more, the mud section has poor plasticity, the die is difficult to debug, and meanwhile, the raw materials are all composed of cordierite phases, the particles are required to be fused and bonded in the sintering process, the sintering temperature is high, and the production cost is relatively high.
It can also be seen from the microscopic images of the rib walls and the wall surfaces of the sintered product in example 4 (fig. 2-4, wherein fig. 2-4 are SEM micrographs of the product corresponding to example 4 at the same magnification and at different positions), the sintered product has fewer holes, higher bonding strength and slight liquid phase generation at part of the positions, and further shows that the lithium porcelain stone (sintering aid) can promote liquid phase generation under the low-temperature condition, thereby playing a role in sintering.
The high thermal shock purifying VOCs honeycomb ceramic carrier prepared in the embodiment is used as a heat accumulating catalytic oxidizer carrier.
The foregoing has outlined rather broadly the more detailed description of embodiments of the invention, wherein the principles and embodiments of the invention are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (10)
1. The preparation method of the honeycomb ceramic carrier for purifying VOCs by high thermal shock is characterized by comprising the following steps:
step 1: crushing cordierite cooked blank, screening after crushing, selecting the screened cooked blank powder as powder A, crushing the cut green blank leftovers, screening after crushing, and selecting the screened green blank powder as powder B;
step 2: mixing the powder A and the powder B obtained in the step 1 to obtain a mixture C, adding a binder and a sintering aid into the mixture C, and uniformly mixing to obtain a mixture D;
step 3: adding glycerol, white oil and water into the mixture D obtained in the step 2 and kneading the mixture D into a block material;
step 4: preparing the block materials obtained in the step 3 into block-shaped mud segments, and sieving the mud segments on an extruder to remove impurities to obtain the impurity-removed mud segments;
step 5: extruding the mud section with the impurities removed in the step 4 through a die to obtain a honeycomb ceramic biscuit, drying the honeycomb ceramic biscuit, and cutting the dried honeycomb ceramic biscuit;
step 6: and (5) sintering the cut ceramic honeycomb biscuit obtained in the step (5) to obtain the ceramic honeycomb carrier.
2. The method for preparing the honeycomb ceramic carrier for purifying VOCs by high thermal shock according to claim 1, wherein the number of meshes of the crushed cordierite green bodies in the step 1 is 180 mesh; the number of the sieved crushed green scraps is 60 meshes.
3. The method for preparing the honeycomb ceramic carrier for purifying VOCs by high thermal shock according to claim 1, wherein the cordierite green compact in the step 1 is a green waste product of at least one of DOC carrier, DPF carrier, SCR carrier, ASC carrier, TWC carrier and GPF carrier or a mat used for sintering; the green body offal is offal of at least one of an SCR carrier, a DOC carrier and an ASC carrier with a wall thickness of less than 4 mil.
4. The method for preparing the honeycomb ceramic carrier for high thermal shock purification of VOCs according to claim 1, wherein the amount of the binder added in the step 2 is 3-6% of the total weight of the mixture C, and the amount of the sintering aid added is 5-12% of the total weight of the mixture C.
5. The method for preparing the honeycomb ceramic carrier for purifying VOCs by high thermal shock according to claim 1, wherein the binder is at least one of methyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose or hydroxyethyl cellulose, the sintering aid is natural lithium-containing ore powder, the granularity of the ore powder is 180 mesh screen blanking, and the D50 is 8-15 μm.
6. The method for preparing the honeycomb ceramic carrier for purifying VOCs by high thermal shock according to claim 1, wherein the amount of water added in the step 3 is 24-28% of the total weight of the mixture C, the amount of glycerol added is 0.1-0.5% of the total weight of the mixture C, and the amount of white oil added is 1-3% of the total weight of the mixture C.
7. The method for preparing the honeycomb ceramic carrier for purifying VOCs by high thermal shock according to claim 1, wherein the block material in the step 4 is a block-shaped mud segment made by a vacuum pug mill, wherein the vacuum degree of the vacuum pug mill is-0.07 to-0.095 MPa; the mud section is screened to remove impurities by passing through a 80-mesh screen and a 100-mesh screen successively for at least one time.
8. The method for preparing the honeycomb ceramic carrier for purifying VOCs by high thermal shock according to claim 1, wherein the sintering period in the step 6 is 40-55h, the sintering temperature is 1230-1250 ℃, and the heat preservation time is 1-4h.
9. A high thermal shock cleaned VOCs honeycomb ceramic support prepared by the method of any one of claims 1 to 8.
10. The use of a Gao Rezhen purified VOCs ceramic honeycomb support according to claim 9 wherein said Gao Rezhen purified VOCs ceramic honeycomb support is a regenerative catalytic oxidizer support.
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| EP1428809A2 (en) * | 2002-12-12 | 2004-06-16 | Ngk Insulators, Ltd. | Process for production of formed honeycomb body, and honeycomb structure |
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| CN115626812A (en) * | 2022-11-11 | 2023-01-20 | 江苏省宜兴非金属化工机械厂有限公司 | Method for preparing low-cost high-performance ceramic impeller by using cordierite honeycomb ceramic waste |
| CN115893983A (en) * | 2023-01-10 | 2023-04-04 | 山东奥福环保科技股份有限公司 | Method for preparing honeycomb ceramic carrier by using honeycomb ceramic carrier green compact and carrier |
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| EP1428809A2 (en) * | 2002-12-12 | 2004-06-16 | Ngk Insulators, Ltd. | Process for production of formed honeycomb body, and honeycomb structure |
| CN1517191A (en) * | 2003-01-24 | 2004-08-04 | 株式会社电装 | Recovery ceramic raw material and method for producing iolite ceramic body using the recovered ceramic raw material |
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