Ceramic fiber white tube catalyst impregnation method

Abstract

The invention discloses a ceramic fiber white tube catalyst impregnation method which comprises the following steps: quantitatively conveying catalyst slurry into a catalyst quantitative tank, and unifying the catalyst dosage of a single ceramic fiber white tube; the catalyst slurry in the catalyst quantifying tank is uniformly sprayed on the inner wall of the ceramic fiber white tube rotationally placed on the catalyst roller trolley through a catalyst spray gun in the catalyst lifter, so that the spraying effect of the catalyst slurry is good, and the efficiency is high; after all the ceramic fiber white tubes are soaked in the catalyst, the ceramic fiber white tubes and the catalyst roller trolley in the starting state are pushed into the oven together to be baked, so that damage to the ceramic fiber white tubes caused by secondary carrying is avoided, and the ceramic fiber white tubes in the oven are in a real-time rotating state; the catalyst can be better and uniformly attached to the inner wall of the ceramic fiber white tube; in addition, a plurality of ceramic fiber white tubes can be placed on the catalyst roller trolley at the same time, and the catalyst roller trolley is matched with the catalyst lifter, so that the catalyst spraying efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic tube impregnation methods, in particular to a ceramic fiber white tube catalyst impregnation method. Background Art

[0002] In recent years, with the increasing requirements for industrial flue gas emissions, new technologies for treatment have been continuously innovated, among which ceramic catalytic filter tube technology has gradually become a key development direction in the field of flue gas denitrification and dust removal. Ceramic catalytic filters are mainly used for industrial flue gas denitrification and dust removal. They have a complex porous structure inside and have the characteristics of high denitrification efficiency and strong dust removal ability. The manufacturing process is relatively complicated and requires product molding, roasting, catalyst loading, baking and other processes. At present, the catalyst loading is mainly carried out by impregnation. The ceramic fiber white tube is immersed in the catalyst in a vacuum chamber. The tube itself is relatively soft. The ceramic fiber white tube is installed by hoisting for impregnation. When the tube body is very soft, the 3m long ceramic fiber white tube body will be heavier, thereby increasing the load on the flange and affecting the strength of the ceramic tube. When the tube body is immersed in the catalyst, a vacuum machine is used to put the vacuum chamber in a negative pressure state. The suction force of the vacuum machine will cause the soft ceramic fiber white tube body to deform, which will fundamentally affect the quality of the ceramic fiber white tube; and only one ceramic fiber white tube can be immersed at a time. The installation and replacement of the ceramic fiber white tube is time-consuming, and the efficiency of impregnating the ceramic fiber white tube with the catalyst is low.

[0003] Therefore, the present application proposes a method for impregnating a ceramic fiber white tube with a catalyst to solve the problems of low efficiency of impregnating a ceramic fiber white tube with a catalyst, easy deformation of the tube body and influence on the strength of the ceramic tube. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a method for impregnating ceramic fiber white tube catalysts.

[0005] The present invention provides a ceramic fiber white tube catalyst impregnation method, comprising the following steps:

[0006] 1) Catalyst quantitative tank preparation: The catalyst slurry in the catalyst stock liquid barrel is quantitatively input into the catalyst quantitative tank through a delivery pump;

[0007] 2) placing the ceramic fiber white tubes to be impregnated in layers on the catalyst roller trolley, starting the motor of the catalyst roller trolley, and making the ceramic fiber white tubes placed on the catalyst roller trolley roll and rotate along their own central axis;

[0008] 3) Adjust the height position of the catalyst spray gun on the catalyst elevator, and first align the catalyst spray gun with the ceramic fiber white tube on the bottom layer on the catalyst roller trolley, ensuring that the four catalyst spray guns correspond to the height position of the flanges of the four ceramic fiber white tubes on the same layer, and align with the central axis of the four ceramic fiber white tubes;

[0009] 4) Start the horizontal moving motor of the catalyst elevator to drive each catalyst spray gun to move back and forth normally in the horizontal direction inside the corresponding ceramic fiber white tube;

[0010] 5) Open the delivery valve in the catalyst delivery system, deliver the catalyst slurry to the tail end of the catalyst spray gun under the action of the internal pressure of the catalyst quantitative tank, and spray the catalyst slurry onto the inner wall of the ceramic fiber white tube after atomization through the nozzle of the catalyst spray gun; the catalyst spray gun sprays back and forth in the ceramic fiber white tube 4-12 times, which is adjusted according to the specifications;

[0011] 6) After the slurry in the catalyst quantitative tank is delivered, the delivery valve is closed, the catalyst spray gun is moved out from the inside of the ceramic fiber white tube, and the horizontal moving motor is turned off. The impregnation of the single-layer ceramic fiber white tube is completed;

[0012] 7) Repeat step 1) to inject the catalyst slurry into the catalyst quantitative tank for standby use; start the vertical lifting motor on the catalyst elevator to drive the catalyst spray gun to move upward, so that the catalyst spray gun is aligned with the central axis of the second layer of ceramic fiber white tubes on the catalyst roller trolley; repeat the above steps 4)-6) to impregnate the inner wall of the second layer of ceramic fiber white tubes with catalyst;

[0013] 8) The catalyst impregnation steps for the ceramic fiber white tubes on the third layer to the highest layer on the catalyst roller trolley are the same as above;

[0014] 9) After all the ceramic fiber white tubes on the catalyst roller trolley are impregnated, push the ceramic fiber white tubes together with the catalyst roller trolley directly into the oven and close the oven;

[0015] 10) Set the oven temperature and time to start drying; when the set time is reached, take out the finished product.

[0016] Preferably, the steps of preparing the catalyst quantitative tank are as follows:

[0017] A. Check that all accessories of the catalyst delivery system are in normal condition, the feeding valve, delivery valve, charging valve and pressure relief valve are in normally closed state, and the delivery pump is in power-off state;

[0018] B. Open the pressure relief valve to completely release the pressure in the catalyst quantitative tank, taking the pressure detector data as zero as the standard;

[0019] C. Open the feeding valve to ensure that the delivery pipeline is unobstructed;

[0020] D. The delivery pump is powered on to deliver the catalyst slurry in the catalyst stock liquid barrel to the catalyst quantitative tank through the feeding valve. The specific delivery amount is based on the set value and the reference level gauge. When the slurry in the catalyst quantitative tank reaches the set value, first turn off the delivery pump, then close the feeding valve, and finally close the pressure relief valve;

[0021] E. Open the pressure-charging valve and pressurize the catalyst quantitative tank to 2kg-6kg. After the pressure reaches the system usage value through feedback from the pressure detector, close the pressure-charging valve;

[0022] F. The above steps can complete the quantitative preparation of catalyst slurry for a single ceramic fiber white tube.

[0023] Preferably, the catalyst roller trolley pushed into the oven in step 9) is always in the started state, ensuring that the ceramic fiber white tube is always in the state of rotating along its own central axis, ensuring the uniformity of catalyst impregnation and heating during the drying process.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The catalyst impregnation method for ceramic fiber white tubes of the present invention can ensure that the amount of catalyst impregnated in each ceramic fiber white tube is consistent by preparing materials in a catalyst quantitative tank; and the catalyst impregnation method provided by the present application is to place the ceramic fiber white tubes in layers on a catalyst roller trolley, and each catalyst roller trolley can place 24 ceramic fiber white tubes at a time, and the ceramic fiber white tubes placed on the catalyst roller trolley are driven by the motor of the catalyst roller trolley to keep rotating along their own central axis; in cooperation with the catalyst spray gun on the catalyst elevator, the catalyst slurry can be atomized and sprayed on the inside of the ceramic fiber white tubes on the same layer at a time, ensuring the uniformity of the catalyst slurry sprayed on the inner wall of the corresponding ceramic fiber white tube, and the number of ceramic fiber white tubes sprayed with catalyst slurry at a single time is large, thereby improving the catalyst spraying efficiency and reducing the labor input cost;

[0026] The impregnated ceramic fiber tube is placed in the oven together with the catalyst roller trolley, and the catalyst roller trolley keeps driving the impregnated and impregnated ceramic fiber tube in a rotating state, which can not only ensure the uniformity of the catalyst impregnation of the impregnated ceramic fiber tube, but also ensure that the impregnated ceramic fiber tube will not be affected by the gravity of the catalyst slurry after softening, and the catalyst slurry will not flow out of the surface of the ceramic fiber tube when the wet ceramic fiber tube rotates, causing local dripping. In the oven, the catalyst roller trolley is also always in the starting state to ensure the uniformity of all surfaces of the ceramic fiber tube during the drying process.

[0027] In addition, the catalyst roller trolley is pushed directly into the oven, and there is no need to transfer the impregnated ceramic fiber white tubes for the second time, thus avoiding quality problems.

[0028] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 This is a system diagram for catalyst impregnation of ceramic fiber white tube;

[0031] Figure 2 is a schematic diagram of the structure of the catalyst delivery system;

[0032] Figure 3 It is a schematic diagram of the structure of the catalyst elevator;

[0033] Figure 4 It is a structural schematic diagram of the catalyst roller trolley;

[0034] Numbers in the figure: 1, catalyst delivery system; 11, catalyst stock solution barrel; 12, delivery pump; 13, feeding valve; 14, charging valve; 15, pressure relief valve; 16, catalyst quantitative tank; 17, delivery valve;

[0035] 2. Catalyst lift; 21. Catalyst spray gun; 22. Horizontal moving motor; 23. Vertical lifting motor;

[0036] 3. Catalyst roller trolley; 31. Ceramic fiber white tube;

[0037] 4. Oven. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] Please refer to Figures 1 to 4The catalyst impregnation system for ceramic fiber white tubes involved in the catalyst impregnation method of the present invention comprises a catalyst delivery system 1, a catalyst elevator 2, a catalyst roller trolley 3 and an oven 4; wherein the catalyst delivery system 1 comprises a catalyst stock solution barrel 11 for storing catalyst slurry; the catalyst stock solution barrel 11 is connected to a catalyst quantitative tank 16 through a delivery pipeline, and a charging valve 14, a pressure relief valve 15, a liquid level gauge, and a pressure detector are provided on the catalyst quantitative tank 16 for adjusting the pressure inside the catalyst quantitative tank 16 and realizing the function of quantitatively storing catalyst slurry; a delivery pipeline is provided with a delivery valve 14, a pressure relief valve 15, a liquid level gauge, and a pressure detector for adjusting the pressure inside the catalyst quantitative tank 16 and realizing the function of quantitatively storing catalyst slurry; a delivery valve 16 is provided on the delivery pipeline. The delivery pump 12 and the feeding valve 13, the bottom outlet of the catalyst quantitative tank 16 is provided with a delivery valve 17, and the bottom outlet of the catalyst quantitative tank 16 is connected to the corresponding catalyst spray gun 21 on the catalyst elevator 2; the catalyst spray gun 21 on the catalyst elevator 2 is arranged on a lifting platform, and the lifting platform can be lifted up and down by the drive of the vertical lifting motor 23, so as to adjust the height position of the catalyst spray gun 21; the catalyst spray gun 21 on the lifting platform can be driven by the horizontal moving motor 22 to move back and forth in the horizontal direction, so as to realize the depth of the catalyst spray gun 21 extending into the ceramic fiber white tube 31;

[0041] The catalyst roller trolley 3 is provided with multiple layers of rotatable rollers, and a ceramic fiber white tube 31 is placed between every two rotatable rollers. Driven by the rotating rollers, the ceramic fiber white tube 31 can rotate along its own central axis to ensure the uniformity of the catalyst spray gun 21 spraying the catalyst slurry onto the inner wall of the ceramic fiber white tube 31; the number of catalyst spray guns 21 corresponds to the number of ceramic fiber white tubes 31 placed in a single layer on the catalyst roller trolley 3, and a layer of ceramic fiber white tubes 31 is quantitatively sprayed at a time. After the spraying is completed, the height of the catalyst spray gun 21 is adjusted to the height of the second layer of ceramic fiber white tubes 31 under the drive of the vertical lifting motor 23, and the catalyst slurry of the second layer of ceramic fiber white tubes 31 is sprayed; after all the ceramic fiber white tubes 31 on the catalyst roller trolley 3 are sprayed, they are connected to the catalyst roller trolley 3 and pushed into the oven 4 for drying.

[0042] Among them, the number of catalyst spray guns 21 on the catalyst elevator 2 and the single-layer ceramic fiber white tubes 31 placed on the corresponding catalyst roller trolley 3 corresponds to each other, and is not limited to four catalyst spray guns 21. At the same time, the number of layers of ceramic fiber white tubes 31 set on the catalyst roller trolley 3 can be determined according to actual production needs.

[0043] An embodiment of the present invention provides a method for impregnating a ceramic fiber white tube with a catalyst, comprising the following steps:

[0044] 1) Preparation of catalyst quantitative tank 16: The catalyst slurry in the catalyst stock liquid barrel 11 is quantitatively input into the catalyst quantitative tank 16 through the delivery pump 12; the catalyst quantitative tank 16 is a customized tank, which is specially made according to the amount of catalyst slurry for each ceramic fiber white tube 31, and is made of stainless steel. The number in the system is determined according to the number of spray guns;

[0045] The steps of preparing the catalyst quantitative tank 16 are as follows:

[0046] A. Check that all accessories of the catalyst delivery system 1 are in normal condition, the feed valve 13, delivery valve 17, charging valve 14 and pressure relief valve 15 are in normally closed state, and the delivery pump 12 is in power-off state; the delivery pump 12 can be a centrifugal pump made of stainless steel; the feed valve 13 and delivery valve 17 can be pneumatic ball valves or pneumatic butterfly valves, and the valves can be normally closed valves made of stainless steel; the pressure detector can be a common pressure gauge or pressure transmitter; the charging valve 14 and pressure relief valve 15 can be pneumatic ball valves, and the valves can be normally closed valves made of carbon steel; the liquid level gauge can be a magnetic flap liquid level gauge;

[0047] B. Open the pressure relief valve 15 to completely release the pressure in the catalyst quantitative tank 16, with the data of the pressure detector being zero as the standard;

[0048] C. Open the feeding valve 13 to ensure that the delivery pipeline is unobstructed;

[0049] D. The delivery pump 12 is powered on to deliver the catalyst slurry in the catalyst stock liquid barrel 11 to the catalyst quantitative tank 16 through the feeding valve 13. The specific delivery amount is based on the set value and the reference level gauge. When the slurry in the catalyst quantitative tank 16 reaches the set value, the delivery pump 12 is first turned off, then the feeding valve 13 is closed, and finally the pressure relief valve 15 is closed;

[0050] E. Open the pressure-charging valve 14, and charge the catalyst quantitative tank 16 to a pressure of 2kg-6kg. After the pressure reaches the system usage value through feedback from the pressure detector, close the pressure-charging valve 14;

[0051] F. The above steps can complete the quantitative preparation of the catalyst slurry for a single ceramic fiber white tube 31.

[0052] 2) placing the ceramic fiber white tubes 31 to be impregnated in layers on the catalyst roller trolley 3, starting the motor of the catalyst roller trolley 3, and making the ceramic fiber white tubes 31 placed on the catalyst roller trolley 3 roll and rotate along their own central axis;

[0053] 3) Adjust the height position of the catalyst spray gun 21 on the catalyst elevator 2, and first align the catalyst spray gun 21 with the bottom layer of ceramic fiber white tubes 31 on the catalyst roller trolley 3, ensuring that the four catalyst spray guns 21 correspond to the flange height positions of the four ceramic fiber white tubes 31 on the same layer, and align with the central axis of the four ceramic fiber white tubes 31;

[0054] 4) Start the horizontal moving motor 22 of the catalyst elevator 2 to drive each catalyst spray gun 21 to move back and forth normally in the horizontal direction inside the corresponding ceramic fiber white tube 31;

[0055] 5) Open the delivery valve 17 in the catalyst delivery system 1, and deliver the catalyst slurry to the tail end of the catalyst spray gun 21 under the action of the internal pressure of the catalyst metering tank 16, and spray the catalyst slurry onto the inner wall of the ceramic fiber white tube 31 through the nozzle of the catalyst spray gun 21 after atomization; the catalyst spray gun 21 sprays back and forth in the ceramic fiber white tube 31 4-12 times, which is adjusted according to the specifications;

[0056] 6) After the slurry in the catalyst quantitative tank 16 is delivered, the delivery valve 17 is closed, the catalyst spray gun 21 is moved out from the inside of the ceramic fiber white tube 31, and the horizontal moving motor 22 is turned off. The impregnation of the single-layer ceramic fiber white tube 31 is completed;

[0057] 7) Repeat step 1) to inject catalyst slurry into the catalyst metering tank 16 for standby use; start the vertical lifting motor 23 on the catalyst elevator 2 to drive the catalyst spray gun 21 to move upward, so that the catalyst spray gun 21 is aligned with the central axis of the second layer of ceramic fiber white tubes 31 on the catalyst roller trolley 3; repeat the above steps 4)-6) to impregnate the inner wall of the second layer of ceramic fiber white tubes 31 with catalyst;

[0058] 8) The catalyst impregnation steps for the ceramic fiber white tubes 31 on the third layer to the highest layer on the catalyst roller trolley 3 are the same as above;

[0059] This method can spray a plurality of ceramic fiber white tubes 31 at the same time, has a high catalyst impregnation efficiency, and avoids the influence of the installation method of the ceramic fiber white tube on its structural strength in the previous impregnation method.

[0060] 9) After all the ceramic fiber white tubes 31 on the catalyst roller trolley 3 are impregnated, the ceramic fiber white tubes 31 together with the catalyst roller trolley 3 are directly pushed into the oven 4, and the oven 4 is closed; wherein, the catalyst roller trolley 3 pushed into the oven 4 is always in the start-up state, ensuring that the ceramic fiber white tubes 31 are always in the state of rotating along their own central axis, ensuring the uniformity of catalyst impregnation and heating during the drying process. In addition, after all the ceramic fiber white tubes 31 on the catalyst roller trolley 3 are impregnated, the catalyst roller trolley 3 is directly pushed into the oven, and there is no need to transport the impregnated ceramic fiber white tubes 31 for a second time, thereby avoiding quality problems caused by the second transportation;

[0061] 10) Set the temperature and time of oven 4 to carry out drying; when the set time is reached, take out the finished product.

[0062] The oven 4 is designed in size according to the length of the ceramic fiber white tube 31 and the number of each dipping, and is made of stainless steel plates, stainless steel profiles and thermal insulation cotton.

[0063] In the oven 4, the catalyst roller trolley 3 is also always in the starting state to ensure the uniformity of each surface of the ceramic fiber white tube 31 during the drying process.

[0064] The present application provides a method for impregnating a ceramic fiber white tube with a catalyst. A catalyst metering tank 16 is provided to ensure that the amount of catalyst impregnated in each ceramic fiber white tube 31 is consistent; the position of the catalyst spray gun 21 is automatically adjusted by the catalyst elevator 2, thereby avoiding the harm to the human body caused by direct contact with the catalyst by the operator during the impregnation process; the use of the catalyst roller trolley 3 can not only avoid uneven catalyst impregnation, but also ensure that the ceramic fiber white tube 31 after impregnation will not cause secondary quality problems due to manual transportation to the oven, such as damage to the straightness of the ceramic fiber white tube 31, the harm of catalyst dripping and clogging the hole, and the harm of uneven catalyst adhesion caused by static wet catalyst ceramic tubes for a long time; the labor intensity is reduced, and the operator does not need to perform intensive operations during the process and can have time to prepare for the next step after completing a certain step, saving time and labor costs.

[0065] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A ceramic fiber white tube catalyst impregnation method, characterized in that: The steps include: 1) Catalyst quantitative tank preparation: The catalyst slurry in the catalyst stock liquid barrel is quantitatively input into the catalyst quantitative tank through a delivery pump; 2) placing the ceramic fiber white tubes to be impregnated in layers on the catalyst roller trolley, starting the motor of the catalyst roller trolley, and making the ceramic fiber white tubes placed on the catalyst roller trolley roll and rotate along their own central axis; 3) Adjust the height position of the catalyst spray gun on the catalyst elevator, and first align the catalyst spray gun with the ceramic fiber white tube on the bottom layer on the catalyst roller trolley, ensuring that the four catalyst spray guns correspond to the height position of the flanges of the four ceramic fiber white tubes on the same layer, and align with the central axis of the four ceramic fiber white tubes; 4) Start the horizontal moving motor of the catalyst elevator to drive each catalyst spray gun to move back and forth normally in the horizontal direction inside the corresponding ceramic fiber white tube; 5) Open the delivery valve in the catalyst delivery system, deliver the catalyst slurry to the tail end of the catalyst spray gun under the action of the internal pressure of the catalyst quantitative tank, and spray the catalyst slurry onto the inner wall of the ceramic fiber white tube after atomization through the nozzle of the catalyst spray gun; the catalyst spray gun sprays back and forth in the ceramic fiber white tube 4-12 times, which is adjusted according to the specifications; 6) After the slurry in the catalyst quantitative tank is delivered, the delivery valve is closed, the catalyst spray gun is moved out from the inside of the ceramic fiber white tube, and the horizontal moving motor is turned off. The impregnation of the single-layer ceramic fiber white tube is completed; 7) Repeat step 1) to inject the catalyst slurry into the catalyst quantitative tank for standby use; start the vertical lifting motor on the catalyst elevator to drive the catalyst spray gun to move upward, so that the catalyst spray gun is aligned with the central axis of the second layer of ceramic fiber white tubes on the catalyst roller trolley; repeat the above steps 4)-6) to impregnate the inner wall of the second layer of ceramic fiber white tubes with catalyst; 8) The catalyst impregnation steps for the ceramic fiber white tubes on the third layer to the highest layer on the catalyst roller trolley are the same as above; 9) After all the ceramic fiber white tubes on the catalyst roller trolley are impregnated, push the ceramic fiber white tubes together with the catalyst roller trolley directly into the oven and close the oven; 10) Set the oven temperature and time to start drying; when the set time is reached, take out the finished product.

2. The ceramic fiber white tube catalyst impregnation method according to claim 1, characterized in that: The steps of preparing the catalyst quantitative tank are as follows: A. Check that all accessories of the catalyst delivery system are in normal condition, the feeding valve, delivery valve, charging valve and pressure relief valve are in normally closed state, and the delivery pump is in power-off state; B. Open the pressure relief valve to completely release the pressure in the catalyst quantitative tank, taking the pressure detector data as zero as the standard; C. Open the feeding valve to ensure that the delivery pipeline is unobstructed; D. The delivery pump is powered on to deliver the catalyst slurry in the catalyst stock liquid barrel to the catalyst quantitative tank through the feeding valve. The specific delivery amount is based on the set value and the reference level gauge. When the slurry in the catalyst quantitative tank reaches the set value, first turn off the delivery pump, then close the feeding valve, and finally close the pressure relief valve; E. Open the pressure-charging valve and pressurize the catalyst quantitative tank to 2kg-6kg. After the pressure reaches the system usage value through feedback from the pressure detector, close the pressure-charging valve; F. The above steps can complete the quantitative preparation of catalyst slurry for a single ceramic fiber white tube.

3. The ceramic fiber white tube catalyst impregnation method according to claim 1, characterized in that: The catalyst roller trolley pushed into the oven in step 9) is always in the starting state, ensuring that the ceramic fiber white tube is always in the state of rotating along its own central axis, ensuring the uniformity of catalyst impregnation and heating during the drying process.

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