Molecular sieve loading apparatus and method for a zeolite wheel

Abstract

The application belongs to the field of molecular sieve loading, and relates to a molecular sieve loading device and method for a zeolite runner, which comprises a slurry storage tank, a fan, a loading assembly and a runner, the slurry storage tank and the fan are arranged above the loading assembly, and the runner is provided with a plurality of runner channels; the loading assembly comprises a loading disc arranged above the runner, and a loading needle which is connected with the loading disc and penetrates through the runner channels and is closed at the bottom, and loading needle discharge ports are uniformly and spacedly arranged on the side wall of the loading needle. When the loading device performs the molecular sieve loading operation of the runner, the hole blocking phenomenon is not prone to occur, the prepared runner finished product is uniformly loaded, the loading amount is high, the strength is excellent, the product quality is good, and the VOCs removal capacity is strong.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of molecular sieve loading, and relates to a molecular sieve loading device and method for a zeolite rotating wheel. BACKGROUND

[0002] When producing VOCs-removing zeolite rotating wheels, it is necessary to load effective components such as molecular sieves on substrates. At present, the method commonly used in the industry is impregnation: first, a slurry of a certain proportion of molecular sieves is prepared, and then the prepared rotating wheel substrate blank is immersed in the slurry for a period of time, so that the molecular sieves can be fully loaded on the rotating wheel substrate. However, the impregnation method mainly has the following shortcomings: (1) due to the narrow rotating wheel channel (the cross-sectional area of a single channel is generally not more than 4mm 2 ), the impregnation process is prone to channel blockage, and large-area channel blockage will lead to a decrease in the effective adsorption area of the zeolite rotating wheel, thereby resulting in poor VOCs removal effect; (2) the thickness of the rotating wheel is generally large, often about 0.4-0.6m, and during impregnation, the loading amount at both ends of the channel is large, and the loading amount in the middle of the channel is low, which is not conducive to VOCs removal and also has a certain adverse effect on the strength of the zeolite rotating wheel. SUMMARY

[0003] To solve the above technical problems, the present application provides a molecular sieve loading device and method for a zeolite rotating wheel, which loads the required molecular sieve slurry into the inner surface of the zeolite rotating wheel channel, which can uniformly load the molecular sieve active components on the rotating wheel and also greatly reduce the phenomenon of channel blockage in the rotating wheel channel. The present application aims to solve the following problems:

[0004] (1) to solve the problem of channel blockage that occurs when loading molecular sieves on the zeolite rotating wheel, thereby increasing the adsorbable area of the rotating wheel, improving the adsorption capacity and VOCs removal effect of the rotating wheel, and also saving the time and cost of the subsequent blowing step.

[0005] (2) to solve the problem of uneven loading at both ends and in the middle of the channel when using the impregnation method to load molecular sieves, thereby improving the adsorption efficiency of the rotating wheel for VOCs and enhancing the overall strength of the rotating wheel.

[0006] The technical scheme provided by the present application is as follows:

[0007] A molecular sieve loading device for a zeolite rotating wheel, comprising a slurry storage tank, a fan, a loading assembly and a rotating wheel, wherein the slurry storage tank and the fan are arranged above the loading assembly, and the rotating wheel is provided with a plurality of rotating wheel channels; the loading assembly comprises a loading disc arranged above the rotating wheel, and a loading needle connected with the loading disc and penetrating through the rotating wheel channels with a closed bottom, and the side wall of the loading needle is uniformly and spacedly provided with loading needle discharge ports.

[0008] Further, the bottom of the loading disc is provided with a plurality of loading disc discharge ports connected with the loading needle feed port.

[0009] Further, the loading needle is a capillary steel tube with one end closed and the other end connected with the loading disc discharge port, and a plurality of loading needle discharge ports are uniformly and spacedly arranged on the side wall of the loading needle along the circumferential edge.

[0010] Further, the feed pipe of the slurry storage tank and the air inlet pipe of the fan are connected with the loading disc feed port above the loading disc through a tee joint.

[0011] Further, the first valve is arranged on the feed pipe of the slurry storage tank and used for controlling the flow of the molecular sieve slurry, and the second valve is arranged on the air inlet pipe of the fan and used for controlling the flow of air.

[0012] Further, the first valve and the second valve are ball valves.

[0013] Further, the slurry recovery tank is arranged below the rotating wheel and has a diameter greater than that of the rotating wheel.

[0014] Further, the feed pipe, the air inlet pipe, the valves, the slurry storage tank and the slurry recovery tank are made of stainless steel.

[0015] Further, the calculation formula of the total number N of the loading needles is N = 0.5ΠR / AB, and the calculation formula of the length h of the loading needle is h = H + 50, wherein R is the diameter of the rotating wheel, A is the corrugation height of the rotating wheel, B is the corrugation width, and H is the thickness of the rotating wheel. 2

[0016] The application further provides a molecular sieve loading method for a zeolite rotating wheel, which comprises the following steps.

[0017] The loading needle is inserted into the rotating wheel channel, and the molecular sieve slurry required to be loaded is added into the slurry storage tank, and the slurry recovery tank is arranged below the rotating wheel.

[0018] The first valve on the feed pipe connected with the slurry storage tank is opened, the molecular sieve slurry is injected into the loading disc and the loading needle through the feed pipe, the fan is started, fresh air is introduced into the loading disc through the air inlet pipe, and the molecular sieve slurry is pushed into the rotating wheel channel through the loading needle discharge hole and is loaded on the inner surface of the rotating wheel channel.

[0019] After the loading of the molecular sieve is completed, the first valve on the feed pipe connected with the slurry storage tank is closed, the fan continues to blow the loading needle, and the excess molecular sieve slurry is collected in the slurry recovery tank.

[0020] The fan is closed, and the loading work is ended. ​

[0021] Further, after the loading of the molecular sieve is completed, the fan continues to blow at a wind speed greater than that when the molecular sieve is being loaded.

[0022] Advantages

[0023] The loading device provided by the application uniformly delivers the molecular sieve slurry into the runner channel by virtue of the unique design of the loading needle, controls the time for the slurry to enter the loading needle, and ensures that the loading slurry will not be too much to cause the channel to be blocked, and the insertion of the loading needle into the channel also plays a filling role, and if there is excess slurry, it will flow out of the runner channel along the loading needle and be collected in the slurry recovery tank, which also makes it difficult for the channel to be blocked. Therefore, when the loading operation of the runner molecular sieve is performed by using the device of the application, the channel is not easy to be blocked, the prepared runner product is uniformly loaded, the loading amount is high, the strength is excellent, the product quality is good, and the VOCs removal capacity is strong.

[0024] When the device of the application is used, raw materials are saved, excess molecular sieve slurry can be recycled and reused, and the economic cost is reduced. The device of the application is simple to operate and convenient to use, the time for molecular sieve loading is short, and the time cost is greatly saved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 The slurry storage tank provided for example 1 is shown in the schematic diagram.

[0026] Fig. 2 The slurry recovery tank provided for example 1 is shown in the schematic diagram.

[0027] Fig. 3 The partial enlarged schematic diagram of the loading needle provided for example 1 is shown.

[0028] Fig. 4 The partial schematic diagram of the loading disc provided for example 1 is shown.

[0029] Fig. 5 The partial schematic diagram of the device working during loading provided for example 1 is shown.

[0030] Fig. 6 The working flowchart of the device is shown.

[0031] The drawing label: 1-slurry storage tank; 2-molecular sieve slurry; 3-slurry storage tank discharge port; 4-slurry recovery tank; 5-recovered molecular sieve slurry; 6-loading needle feed port; 7-loading needle; 8-loading needle discharge port; 9-omitted part of the middle section of the loading needle; 10-closed tail end of the loading needle; 11-loading disc; 12-loading disc discharge port (and loading needle welding); 13-loading disc feed port; 14-first valve; 15-second valve; 16-fresh air; 17-fan; 18-runner. DETAILED DESCRIPTION

[0032] Example 1

[0033] like Figs. 1-6 As shown, a molecular sieve loading device for a zeolite rotor includes a slurry storage tank 1, a blower 17, a loading assembly, and a rotor 18. The slurry storage tank 1 and the blower 17 are positioned above the loading assembly. The rotor 18 has multiple rotor channels. The loading assembly includes a loading disk 11 positioned axially above the rotor 18, and loading needles 7 connected to the loading disk 11 and passing through the bottom of the rotor channels, which are closed. Loading needle outlets 8 are evenly spaced on the sidewalls of the loading needles 7. The slurry storage tank 1, the blower 17, and the loading disk 11 are connected via pipes. The slurry storage tank 1 is used to store molecular sieve slurry for later use. The blower 17 pressurizes and pushes the molecular sieve slurry and purges it after loading. The blower pushes the molecular sieve slurry into the rotor channels through the pipes, where it is loaded onto the inner surface of the channels.

[0034] The bottom of the load plate 11 is provided with a plurality of load plate outlets 12, and the load plate outlets 12 are connected to the load needle inlet 6.

[0035] The loading needle 7 is used to uniformly load the molecular sieve slurry within the molecular sieve channels. The loading needle 7 is a capillary steel tube with one end closed and the other end connected to the discharge port 13 of the loading disk. Several loading needle discharge ports are evenly spaced along the circumferential edge on the side wall of the capillary steel tube. The diameter and length of the capillary steel tube are selected according to the size and length of the zeolite rotor channels.

[0036] The distribution and size of the load pins are determined according to the specifications of the rotating wheel: the wheel diameter is R, the thickness is H, the corrugation height is A, and the corrugation width is B. Therefore, the vertical distance between the load pins is A, the horizontal distance is B, and the total number of load pins N is N = 0.5πR. 2 / AB, the length of the load pin h = H + 50. For example, when the diameter of the wheel is 200mm, the thickness is 100mm, the corrugation height is 12mm, and the corrugation width is 15mm, the vertical distance between the load pins is 12mm, the horizontal distance is 15mm, the total number of load pins is 349, and the length is 150mm.

[0037] The feed pipe and air inlet pipe are each equipped with a valve, and the feed pipe, air inlet pipe, and valves are made of materials resistant to slurry corrosion. The valves are ball valves.

[0038] A slurry recovery tank 4 is provided below the rotor. The slurry recovery tank 4 is used to recover excess molecular sieve slurry blown out during the loading process for recycling, thereby reducing economic costs. The diameter of the slurry recovery tank 4 is larger than the diameter of the rotor 18.

[0039] The slurry storage tank and the slurry recovery tank are made of a material resistant to slurry corrosion.

[0040] The slurry storage tank 1 is provided with an opening at the bottom to communicate with a feeding pipe. Fresh air is drawn into a fan, and the fan is connected to an air inlet pipe. The feeding pipe of the slurry storage tank 1 and the air inlet pipe of the fan 17 are connected to the load disc feeding port 13 above the load disc 11 through a tee joint. A plurality of circular holes are formed in the load disc below as load disc discharge ports, and each load disc discharge port is connected to a load needle. The side wall of the load needle is uniformly provided with three circular holes as load needle discharge ports at certain intervals. The load needle is inserted into the runner hole, and the slurry recovery tank is arranged below the runner.

[0041] The above technical solution can simultaneously load slurry to a plurality of runner holes. During use, the middle part and both ends of the hole can be uniformly loaded, avoiding the situation that the middle part is loaded too little and both ends are loaded too much.

[0042] The feeding pipe and the air inlet pipe are each provided with a valve, and the feeding pipe, the air inlet pipe and the valve are made of a material resistant to slurry corrosion.

[0043] The valve is a DN20 ball valve. The feeding pipe of the slurry storage tank 1 is provided with a first valve 14 for controlling the flow of the molecular sieve slurry. The air inlet pipe of the fan is provided with a second valve 15 for controlling the flow of air. The use of the valve can more accurately control the flow of the pipe medium, and only a small torque is required to tightly close the valve.

[0044] The above solution can prolong the service life of the device, reduce the maintenance cost, improve the safety, and also help environmental protection and expand the application range.

[0045] A molecular sieve loading method for a zeolite runner includes the following steps:

[0046] (1) Preparation: insert the load needle 7 into the runner hole, and add the molecular sieve slurry 2 to be loaded into the slurry storage tank 1, and place the slurry recovery tank 4 below the runner.

[0047] (2) Start loading: open the first valve 14 of the feeding pipe connected to the slurry storage tank 1, wait for the molecular sieve slurry to fill the load disc 11 and the load needle 7 through the feeding pipe, start the fan 17, and the fresh air 16 enters the load disc 11 through the air inlet pipe and pushes the molecular sieve slurry to enter the runner hole through the load needle discharge port 8 and be loaded on the inner surface of the runner hole.

[0048] (3) Loading completion: close the first valve 14, open the second valve 15, and the air blower 17 blows the loading needle 7 for a proper time, and the excess molecular sieve slurry is collected in the slurry recovery tank 4 for the next loading.

[0049] (4) Loading completion: close the first valve 14, open the second valve 15, and the air blower 17 blows the loading needle 7 for a proper time, and the excess molecular sieve slurry is collected in the slurry recovery tank 4 for the next loading.

[0050] Example 1

[0051] The diameter of the rotating wheel 18 to be loaded with molecular sieve is 4250 mm, the width is 400 mm, the channel is corrugated, the edge length is 3 mm, and the corrugation height is 2 mm.

[0052] The required molecular sieve slurry 2 is a composite slurry configured by ZSM-5 and Y molecular sieve. The concentration of molecular sieve in the molecular sieve slurry is 25-30%, the concentration of slurry additive is 1-5%, and the ratio of ZSM-5 to Y is 1:1.

[0053] The specifications of the air blower 17 are selected as follows: power 250W, air volume 0-500m 3 / h, voltage 220V.

[0054] The specifications of the loading disc 11 are selected as follows: diameter 4500 mm.

[0055] The specifications of the loading needle 7 are selected as follows: capillary steel pipe diameter 1.5 mm, length 450 mm.

[0056] The specifications of the slurry storage tank 1 are selected as follows: length, width and height are all 1000 mm, and the upper part is open.

[0057] The specifications of the slurry recovery tank 4 are selected as follows: length and width are both 4500 mm, and the height is 500 mm. The upper part is open.

[0058] The pipe size connecting the slurry storage tank 1, the air blower 17 and the loading needle 7 is DN20, and the first valve 14 and the second valve 15 are selected as DN20 ball valves.

[0059] The connecting pipes of the slurry storage tank 1, the slurry recovery tank 4 and the loading needle 7 are all made of 304 stainless steel.

[0060] The implementation process is as follows:

[0061] (1) Pour the prepared molecular sieve slurry 2 into the slurry storage tank 1;

[0062] (2) Place the slurry recovery tank 4 below the rotating wheel 18 to prepare for slurry recovery;

[0063] (3) Insert the loading needle 7 into the rotating wheel channel that needs to be loaded until the end of the loading needle 7 protrudes from the other end of the channel;

[0064] (4) Open the first valve 14, the molecular sieve slurry 2 in the slurry storage tank 1 begins to inject into the loading disc 11 and the loading needle 7;

[0065] (5) Open the second valve 15, start the fan 17, adjust the rotating speed of the fan 17 until the air volume is 100 m 3 / h, at this time, the fresh air 16 pushes the molecular sieve slurry in the loading needle 7 to contact with the inner surface of the runner channel through the loading needle discharge port 8, and the loading begins;

[0066] (6) After loading for 10 minutes, close the first valve 14, stop the molecular sieve slurry, continue to work the fan 17, and adjust the air volume to 200 m 3 / h, the air blows the loading needle 7 and the runner channel, blows out the excess slurry in the loading needle 7 and the runner channel, and recycles by the slurry recycling tank 4 below.

[0067] (7) After blowing for 5-10 minutes until there is no slurry dropping in the channel, close the second valve 15, close the fan 17, take out the loading needle 7 from the runner channel, and the loading process is completed.

[0068] Example 4

[0069] The effect of the loading device of the application is verified through a comparative experiment:

[0070] Experiment 1: The zeolite runner is loaded by using the traditional immersion method, the runner substrate has a diameter of 1250 mm and a thickness of 400 mm, the concentration of the molecular sieve slurry used for loading is 28%, after one immersion, the loading amount is 53.5 kg / m 3 , after two immersions, the runner appears a hole blocking phenomenon. The time used for two immersions and air blowing is 12 h. The adsorption amount is 2.45 kg / m 3 after testing VOCs adsorption.

[0071] Experiment 2: The zeolite runner is loaded by using the loading device of the application, the runner substrate has a diameter of 1250 mm and a thickness of 400 mm, the concentration of the molecular sieve slurry used for loading is 28%, the loading amount is 87.1 kg / m 3 after loading, the loading time is 4 h, and there is no hole blocking phenomenon. The adsorption amount is 3.93 kg / m 3

[0072] Experiment summary: Compared with the traditional immersion loading method, the loading amount of the loading method of the application is increased from 53.5 kg / m 3 to 87.1 kg / m 3, the loading time was reduced from 12 h to 4 h, a reduction of 66.7%, and the VOCs adsorption capacity was increased from 2.45 kg / m 3 to 3.93 kg / m 3 , an increase of 60.4%.

Claims

1. A molecular sieve loading device for a zeolite rotor, characterized in that, The device includes a slurry storage tank, a blower, a load assembly, and a rotor. The slurry storage tank and the blower are positioned above the load assembly. The rotor has multiple rotor channels. The load assembly includes a load disk positioned above the rotor and load needles connected to the load disk and passing through the rotor channels with their bottoms closed. Load needle outlets are evenly spaced on the sidewalls of the load needles. The bottom of the load disk has several load disk outlets connected to the load needle inlets. The feed pipe of the slurry storage tank and the air inlet pipe of the blower are connected to the load disk inlet above the load disk via a T-joint. A first valve is installed on the feed pipe of the slurry storage tank to control the flow of molecular sieve slurry. A second valve is installed on the air inlet pipe of the blower to control the flow of air. A slurry recovery tank is located below the rotor, and the diameter of the slurry recovery tank is larger than the diameter of the rotor.

2. The molecular sieve loading device for a zeolite rotor according to claim 1, characterized in that, The load needle is a capillary steel tube that is closed at one end and connected to the discharge port of the load plate at the other end. The side wall of the load needle is evenly provided with several load needle discharge ports distributed along the circumference.

3. The molecular sieve loading device for a zeolite rotor according to claim 1, characterized in that, The first valve and the second valve are ball valves.

4. The molecular sieve loading device for a zeolite rotor according to claim 1, characterized in that, The formula for calculating the total number of load pins N is: N = 0.5πR 2 / AB, the formula for calculating the length h of the load needle is h=H+50, where R is the diameter of the wheel, A is the height of the corrugated wheel, B is the width of the corrugation, and H is the thickness of the wheel.

5. A method for loading molecular sieves onto a zeolite rotor, characterized in that, The method of loading a zeolite rotor using the molecular sieve loading device as described in claim 1 includes the following steps: Insert the loading needle into the rotor channel and add the molecular sieve slurry to be loaded into the slurry storage tank. The slurry recovery tank is placed below the rotor. Open the first valve on the feed pipe connected to the slurry storage tank, wait for the molecular sieve slurry to fill the load plate and load needle through the feed pipe, turn on the blower, fresh air enters the load plate through the air inlet pipe, and pushes the molecular sieve slurry through the discharge hole of the load needle into the rotor channel, and loads it on the inner surface of the rotor channel. After the molecular sieve loading is completed, the first valve on the feed pipe connected to the slurry storage tank is closed, and the blower continues to purge the loading needle. The excess molecular sieve slurry blown out is collected in the slurry recovery tank. Turn off the fan and stop the load operation.

6. The molecular sieve loading method for a zeolite rotor according to claim 5, characterized in that, After the molecular sieve is loaded, the blower continues to blow at a higher speed than when the molecular sieve was loaded.

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