CN116510405A - Equipment for effectively protecting catalyst and purifying method based on equipment - Google Patents

Abstract

The application relates to equipment for effectively protecting a catalyst and a purifying method based on the equipment, and relates to the technical field of preparing hydrogen peroxide by an anthraquinone method, wherein the equipment comprises a primary device and a secondary device; the primary device comprises a primary shell and a primary filter element, wherein a filter layer of the primary filter element comprises an inner layer and an outer layer, the inner layer is a composite layer formed by one or two of a polyester layer and a glass fiber layer, and the outer layer is a cation exchange resin layer; the secondary device comprises a secondary shell and a secondary filter element, and a filter layer of the secondary filter element is a fluorine-containing material layer. The first-stage device and the second-stage device which are connected in series purify the regeneration liquid, remove dust particles, metal ions and the like in the regeneration liquid by a systematic purification method, improve the influence of dust particles and metal ions introduced into the regeneration liquid by a clay bed on a catalyst and a finished product, and improve a series of problems of high pressure drop, rapid activity drop, increased side reaction, unstable hydrogen peroxide production and the like of a hydrogenation tower bed in the hydrogen peroxide production process.

Description

A device for effectively protecting catalyst and a purification method based on the device

technical field

The present application relates to the technical field of preparing hydrogen peroxide by anthraquinone method, in particular to a device for effectively protecting catalysts and a purification method based on the device.

Background technique

The production of hydrogen peroxide by the anthraquinone method is one of the most mature production methods for the production of hydrogen peroxide in the world. The production of hydrogen peroxide by the anthraquinone method refers to the use of quinones that can be hydrogenated and reduced and then restored to quinones. Alkylquinone derivatives are used as carriers, hydrogenated under the catalysis of palladium catalyst, and then oxidized to synthesize hydrogen peroxide. The process is through anthraquinone hydrogenation reaction, oxidation reaction, extraction separation and regeneration. After regeneration, the anthraquinone returns to the hydrogenation unit, and the above process is repeated. It can be seen that the production process of hydrogen peroxide is a cyclic process.

In the palladium catalyst hydrogenation reaction, the main factors affecting catalytic deactivation are: 1) poisoning deactivation; 2) blockage deactivation; 3) sintering deactivation (thermodynamic sintering/chemical sintering); 4) thermal deactivation. The regeneration process of the regeneration solution of the anthraquinone method hydrogen peroxide device is usually realized through a clay bed, and the clay particles filled in the clay bed will bring a large amount of fine dust and trace metal ions (such as Cr, Fe, Ni, Co , Cu, etc.), the fine dust will deposit on the surface of the catalyst, or even wrap the catalyst, so that the specific surface area of the catalyst activity is reduced or the active components are isolated, resulting in a decrease in the activity of the palladium catalyst or deactivation, affecting the service life of the catalyst . A small amount of metal ions will lead to slow chemical sintering of the active components of the palladium catalyst, resulting in a decrease in the content of active microcrystalline palladium and affecting the activity of the catalyst.

In the production of traditional anthraquinone hydrogen peroxide plant, the regenerated solution passing through the clay bed is filtered by a filter bag filter and then enters the hydrogenation unit (the hydrogenation unit is filled with catalyst palladium catalyst), and there is a lot of dust in the regeneration solution entering the hydrogenation unit The existence of particles and trace metal ions, dust particles and metal ions will reduce the activity of the palladium catalyst on the one hand, affect the service life and selectivity of the catalyst; on the other hand, it will lead to a decline in the quality of the finished product.

Contents of the invention

In order to improve the impact of dust particle impurities and trace metal ions in the regeneration liquid on the production equipment and finished products, the application provides an effective catalyst protection equipment and a purification method based on the equipment.

An effective protection catalyst equipment provided by the application, a purification method based on the equipment, adopts the following technical scheme:

In the first aspect, the present application provides a device for effectively protecting the catalyst, which adopts the following technical solution:

A device for effectively protecting catalysts, comprising a primary device and a secondary device connected in series with the primary device;

The primary device includes a primary shell and a primary filter element, the filter layer of the primary filter element includes an inner layer and an outer layer, and the inner layer is a composite layer composed of one or both of a polyester layer and a glass fiber layer , the outer layer is a cation exchange resin layer;

The secondary device includes a secondary shell communicated with the primary shell and a secondary filter element, the filter layer of the secondary filter element is a fluorine-containing material layer.

By adopting the above technical scheme, the primary device and the secondary device containing different filter materials are connected in series to purify the regenerated liquid to be added to the hydrogenation device. Among them, the primary filter element is used to completely purify material particles with a particle size of 10 μm or more, and the purification efficiency for material particles with a particle size of 1 μm reaches 99.91%; the secondary filter element is used to completely purify material particles with a particle size of 2 μm or more. The purification efficiency of the material particles reaches 99.99%. The systematic method of purifying the regeneration liquid by the first-level device and the second-level device can effectively remove the dust particles and metal cations in the liquid material, and improve the regeneration liquid in the hydrogen peroxide production process. Particles lead to a series of problems such as high pressure drop in the hydrogenation tower bed layer, rapid activity drop, increased side reactions, and unstable hydrogen peroxide production.

Optionally, the filter layer of the primary filter element includes at least two inner layers, and the filter layer of the secondary filter element is configured as one or two layers.

By adopting the above technical scheme, by setting the filter layer of the first-stage filter element to be multi-layered and the filter layer of the second-stage filter element to be more than one layer, the multiple layers can purify the regenerated liquid step by step, so as to improve the efficiency of the first-stage filter element and the second-stage filter element. Purification effect of regeneration fluid.

Optionally, each layer of the inner layer of the first-stage filter element has different filtration precisions; when the filter layers of the second-stage filter element are provided with two layers, the two layers have different filtration precisions.

By adopting the above technical scheme and configuring filter materials with different filtration precision, the adjustment of the filtration precision and filtration characteristics of the primary filter element and the secondary filter element can be realized, and it is convenient to configure different filter elements according to different filtering requirements, and improve the efficiency of the primary filter element and the secondary filter element. The versatility of cartridge filtration.

Optionally, vent pipes, lifting lugs, feed pipes, discharge pipes, pressure gauge pipes for installing pressure gauges, drain pipes and static grounding plates are provided on the outer wall of the primary housing.

By adopting the above technical scheme, the regeneration liquid enters the first-stage device along the feed pipe, and flows out along the discharge pipe after being purified by the first-stage filter element. The pressure of the first-stage device can be monitored through the pressure gauge tube and pressure gauge to ensure that the first-stage device The purification effect is stable; the discharge pipe is used to empty the regeneration liquid in the primary device; the static grounding plate eliminates the static electricity generated during the purification process, and the emptying pipe realizes the pressure relief of the primary device, reducing the pressure in the primary device and lifting Ears facilitate transport of primary units.

Optionally, a baffle is fixedly installed on the inner wall of the primary housing, the feed pipe and the discharge pipe are respectively placed on both sides of the baffle, and installation holes are opened on the baffle, An installation assembly for fixing the first-stage filter element on the separator plate is fixedly installed on the partition plate, and the end of the first-stage filter element is placed at the installation hole.

By adopting the above technical scheme, the regeneration liquid flows into one side of the partition along the feed pipe and passes through the primary filter element to enter the other side of the partition under the pressure of its own continuous supply. The partition realizes the raw and purified regeneration in the primary casing. liquid separation.

Optionally, the mounting assembly includes a pull rod fixedly installed on the partition, a support plate fixedly mounted on the end of the pull rod away from the partition, and a support plate placed between the partition and the pull plate. A guide plate, the guide plate is connected with the pull rod, a guide hole is opened on the guide plate, the primary filter element passes through the installation hole and the guide hole is pressed against the support plate, so The end of the first-stage filter element is in sealing connection with the hole wall of the installation hole.

By adopting the above technical scheme, when installing the first-stage filter element on the separator, firstly install the pull rod on the separator, then install the guide plate at the middle of the pull rod, install the support plate at the end of the pull rod, and then install the The first-stage filter element passes through the installation hole and the guide hole so that its end can be pressed against the support plate. The support plate fixes and supports the first-stage filter element to realize its installation on the installation component, and the guide plate limits the position of the first-stage filter element. , to improve the stability of the fixed installation of the primary filter element on the installation assembly.

Optionally, a sealing ring is provided on the wall of the installation hole, and the outer peripheral wall of the primary filter element is pressed against the inner ring of the sealing ring.

By adopting the above technical scheme, the sealing ring is placed between the hole wall of the installation hole and the first-stage filter element, so as to realize the sealed connection between the first-stage filter element and the partition plate, and reduce the unpurified regenerated liquid along the first-stage filter element and the installation hole of the partition plate. Risk of crevice flow to the cleaned regeneration fluid side.

Optionally, a filter chamber is formed in the primary filter element along the axial direction, and the primary device further includes a booster assembly, the booster assembly includes a liquid guide rod that is rotatably installed in the filter cavity, a liquid guide rod that is fixedly installed A limiting bracket for axially limiting the liquid guide rod on the separator and a plurality of fan pieces circumferentially fixed on the liquid guide rod, the liquid guide rod and the position limiting The support rotates and cooperates, the outer wall of the liquid guiding rod is spirally provided with a liquid guiding groove, and the lumen of the feeding pipe is arranged facing the fan surface of the fan.

By adopting the above technical solution, the purification speed is slow due to the high purification precision of the primary filter element and the small purification area. A booster device is installed, and the regenerated liquid that enters the first-stage housing along the feed pipe acts on the fan, and the liquid guide rod is driven to rotate through the fan, and the liquid guide groove on the liquid guide rod pumps the regenerated liquid into the filter chamber, improving the filtration efficiency. The flow rate of the regeneration liquid in the cavity can be adjusted to realize the pressurization of the regeneration liquid in the filter cavity and improve the purification efficiency of the primary filter element.

Optionally, a communication pipe is connected between the discharge pipe and the secondary device, a hydraulic motor is arranged between the communication pipes, and the top end of the liquid guide rod passes through the primary casing and is driven by the hydraulic motor. connect.

By adopting the above-mentioned technical solution, by setting a hydraulic motor between the connecting pipes, the regeneration fluid purified by the first-stage device flowing through the connecting pipes drives the hydraulic motor to rotate, and the hydraulic motor drives the liquid guide rod to rotate to realize the pressurization of the booster assembly.

In the second aspect, the present application also discloses a purification method based on the above-mentioned equipment for effectively protecting the catalyst, adopting the following technical scheme:

A method for purifying equipment based on effective catalyst protection, comprising the steps of:

S1. Primary purification: use the primary device to perform primary purification and cation exchange on the liquid material to be purified, and input the liquid material to be purified into the primary shell through the primary feed pipe, and the primary filter element in the primary shell The liquid material to be purified is purified, and the purified liquid material flows out from the primary discharge pipe;

S2. Secondary purification: use the secondary device to perform secondary purification on the liquid material that has been purified by the primary stage, and input the liquid material that has been purified by the primary stage into the secondary shell through the secondary feed pipe, and the secondary shell in the secondary shell The first-stage filter element purifies the liquid material after the first-stage purification, and the purified liquid material flows out from the second-stage discharge pipe.

In summary, the application includes the following beneficial technical effects:

1. The first-level device and the second-level device with different filter materials are connected in series, and the regeneration liquid to be added to the hydrogenation device is purified, and the dust particles and metal ions and other impurities in the regeneration liquid are removed through a systematic purification method to reduce the impact on the palladium catalyst. And the impact of the finished product, while improving a series of problems such as high pressure drop in the hydrogenation tower bed layer, rapid activity drop, increased side reactions, and unstable hydrogen peroxide production due to impurities;

2. Set up a booster device to increase the flow rate of the regeneration liquid at the filter chamber, realize the pressurization of the regeneration liquid in the filter chamber, and improve the purification efficiency of the primary filter element;

3. The systemic purification method of purifying the liquid material by the first-level device and the second-level device in turn can effectively remove the material particles in the liquid material and improve the pressure drop of the hydrogenation tower bed caused by the regeneration liquid particles in the hydrogen peroxide production process , rapid decline in activity, increased side reactions, unstable hydrogen peroxide production and a series of problems.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of Embodiment 1 of the present application.

FIG. 2 is a schematic diagram showing the structure of a primary filter element in Embodiment 1 of the present application.

FIG. 3 is a schematic diagram of the overall structure of Embodiment 4 of the present application.

Explanation of reference signs: 1, primary device; 11, primary shell; 1101, lower shell; 1102, upper shell; 1103, upper shell cavity; 1104, lower shell cavity; 1105, feed pipe; 1106, outlet Material pipe; 1107, pressure gauge tube; 1108, net discharge pipe; 1109, electrostatic grounding plate; 1110, vent pipe; 1111, lifting lug; 12, primary filter element; 121, filter element outer skeleton; 123. Filter element end cover; 124. Filter element support grid; 2. Secondary device; 21. Secondary shell; 22. Secondary filter element; 3. Partition plate; 4. Mounting hole; 52. Support plate; 53. Guide plate; 54. Guide hole; 55. Seal ring; 6. Filter chamber; 7. Booster assembly; 71. Liquid guide rod; 8. Connecting pipe; 9. Hydraulic motor.

Detailed ways

The present application will be described in further detail below in conjunction with accompanying drawings 1-3.

The embodiment of the present application discloses a device for effectively protecting a catalyst and a purification method based on the device.

Example 1:

Referring to FIG. 1 and FIG. 2 , an effective catalyst protection device includes a primary device 1 , a secondary device 2 and a communication pipe 8 communicating between the primary device 1 and the secondary device 2 .

The first-level device 1 and the second-level device 2 purify the regeneration liquid, purify the dust particles and trace metal ions in the regeneration liquid, and improve the problem that the regeneration liquid entering the hydrogenation device 10 contains more dust particles and trace metal ions, Improve the impact of dust particles and trace metal ions in the regeneration liquid on the hydrogenation tower catalyst and finished products, and further improve the dust particles in the regeneration liquid in the hydrogen peroxide production process, which leads to high pressure drop in the hydrogenation tower bed layer, rapid decline in activity, and increased side reactions , hydrogen peroxide production instability and a series of problems.

Referring to FIG. 1 and FIG. 2 , the primary device 1 includes a primary casing 11 , a mounting assembly 5 fixedly installed in the primary casing 11 , and a primary filter element 12 fixedly mounted on the mounting assembly 5 .

The primary shell 11 is capsule-shaped, and it includes a lower shell 1101 with one end open and an upper shell 1102 with one end open. The open ends of the upper shell 1102 and the lower shell 1101 are arranged oppositely. The upper casing 1102 is rotated and fastened to the opening end of the upper casing 1102 through the hinge rotation connection. A lower casing cavity 1104 is formed inside the lower casing 1101 , and an upper casing cavity 1103 is formed inside the upper casing 1102 .

A feed pipe 1105 and a discharge pipe 1106 are welded on the outer wall of the lower housing 1101, and the lumen of the feed pipe 1105 and the lumen of the discharge pipe 1106 are connected with the lower shell cavity 1104, and the discharge pipe 1106 is far away from the One end of the lower casing 1101 communicates with one end of the communication pipe 8 . The regeneration liquid enters the primary shell 11 along the feed pipe 1105 , and flows out along the discharge pipe 1106 after being purified by the primary filter element 12 , and flows into the secondary device 2 through the connecting pipe 8 .

A pressure gauge tube 1107 is also welded on the lower shell 1101 , and the lumen of the pressure gauge tube 1107 communicates with the lower shell cavity 1104 . The pressure gauge tube 1107 is used to install the pressure gauge, which is convenient for real-time detection of the pressure in the primary shell 11, ensures that the pressure in the primary shell 11 is stable and moderate, reduces the risk of leakage or explosion of the primary shell 11, and improves the performance of the primary device. 1 service life. A drain pipe 1108 is welded on the bottom of the lower shell 1101 , and the lumen of the drain pipe 1108 communicates with the lower shell cavity 1104 to facilitate the emptying of the regenerated liquid in the primary shell 11 . The bottom of the lower housing 1101 is equipped with an electrostatic grounding plate 1109 through bolts. The electrostatic grounding plate 1109 is placed on the ground to realize the connection with the ground, guide the static electricity generated during the purification process into the ground, eliminate the static electricity generated during the purification process, and reduce the impact of static electricity on the purification process. device impact.

The top of the upper casing 1102 is welded with a vent pipe 1110, and the lumen of the vent pipe 1110 is connected to the upper shell cavity 1103. Usually, a switch control valve is installed at the vent pipe 1110 to control the flow of the vent pipe 1110. The vent pipe 1110 is convenient to discharge the regeneration liquid or gas in the primary shell 11, or to release the pressure of the primary shell 11, reduce the pressure in the primary device 1, and keep the pressure in the primary device 1 stable. The upper housing 1102 is also welded with lifting lugs 1111 , which are convenient for hanging hooks or threading of slings, and are convenient for moving the primary device 1 .

Referring to Figures 1 and 2, a partition 3 is provided inside the lower casing 1101, the partition 3 is disc-shaped, and the edge of the partition 3 is seamlessly welded to the inner side wall of the lower casing 1101 to realize the connection of the lower casing cavity 1104. Separation, the connection positions of the feed pipe 1105 and the discharge pipe 1106 with the lower casing 1101 are respectively placed on both sides of the partition 3 . An installation hole 4 is opened through the partition plate 3 , and the top end of the primary filter element 12 is installed at the installation hole 4 .

An installation assembly 5 is fixedly installed on the partition 3 , and the installation assembly 5 is placed on the side of the partition 3 close to the discharge pipe 1106 . The mounting assembly 5 includes a tie rod 51 fixedly mounted on the partition plate 3 by bolts, a support plate 52 and a guide plate 53 installed on the pull rod 51, and the support plate 52, the guide plate 53 and the partition plate 3 are arranged parallel to each other. The number of pull rods 51 is set to four, and they are symmetrically distributed about the central axis of the partition plate 3. The guide plate 53 is fixedly installed in the middle of the length direction of the four pull rods 51 by bolts, and the support plate 52 is fixed by bolts. The end of the partition 3. A guide hole 54 is opened on the guide plate 53 , the shape of the guide hole 54 is adapted to the cross-sectional shape of the primary filter element 12 , and it is arranged coaxially with the installation hole 4 .

When the installation assembly 5 is assembled on the partition plate 3, the pull rod 51 is fixedly installed on the partition plate 3 first, then the guide plate 53 is installed in the middle of the pull rod 51 by bolts, and finally the support plate 52 is installed on the end of the pull rod 51 position, so far the assembly of the mounting assembly 5 on the partition 3 is realized.

When the first-stage filter element 12 is installed, pass the first-stage filter element 12 through the installation hole 4 and the guide hole 54 so that its end can be pressed against the support plate 52. At this time, the other end of the first-stage filter element 12 is just placed in the installation hole 4 At the position, the guide hole 54 on the guide plate 53 limits the position of the first-stage filter element 12, and the support plate 52 supports the axial direction of the first-stage filter element 12, so as to improve the stability of the fixed installation of the first-stage filter element 12 on the installation assembly 5. The assembly 5 realizes the positioning and installation of the filter element in the primary casing 11 .

A sealing ring 55 is embedded on the hole wall of the installation hole 4 . In the embodiment of the present application, the sealing ring 55 is an O-ring 55 , and the material of the O-ring is fluororubber or fluorine-coated material. After the primary filter element 12 is installed in the primary shell 11 through the installation assembly 5, the end of the primary filter element 12 is pierced and installed at the installation hole 4, and the outer wall of the end of the primary filter element 12 is pressed against the inner ring wall of the sealing ring 55 Above, the sealing ring 55 fills and seals the gap between the installation hole 4 and the primary filter element 12 to realize the sealed connection between the primary filter element 12 and the partition plate 3 .

The regeneration liquid enters the first-stage housing 11 along the feed pipe 1105, and is placed on one side of the partition 3. After being purified by the primary filter element 12, it enters the other side of the partition 3. The partition 3 realizes the purification of the unpurified regeneration liquid and Separation of regeneration fluid after purification. The sealing ring 55 reduces the risk of the unpurified regeneration liquid flowing to the purified regeneration liquid side along the gap between the primary filter element 12 and the mounting hole 4 of the separator 3 .

The first-stage filter element 12 is cylindrical, and the first-stage filter element 12 includes a filter element outer frame 121, an integrally formed filter element inner support 122 inside the filter element outer frame 121, a filter element end cover 123 welded on one end of the filter element outer frame 121, a plug-in The filter element support grid 124 installed between the filter element outer frame 121 and the filter element inner support 122 . The outer frame 121 of the filter element, the inner support 122 of the filter element and the end cover 123 of the filter element are all made of polyester material. The filter element end cover 123 is placed on the side of the primary filter element 12 close to the support plate 52, and the size of the primary filter element 12 is 150mm*1024mm.

There are multiple filter element support grids 124 along the axial direction of the primary filter element 12. In the embodiment of the present application, the number of filter element support grids 124 is set to 3, and the 3 filter element support grids 124 are coaxial with the inner support 122 of the filter element set and extend along the axis of the primary filter element 12 in sequence, and two adjacent filter element support grids 124 abut against each other.

The filter element support grid 124 is the filter layer of the primary filter element 12, and the filter element support grid 124 includes an inner layer and an outer layer. Since the purification accuracy of the primary filter element 12 can be selected within the range of 1-5 μm, there are many types of composites for the filter element support grid 124, which can be adjusted according to different application conditions.

The inner layer of the filter element support grid 124 is a composite layer composed of one or both of the polyester layer and the glass fiber layer, and the outer layer is a cation exchange resin layer, and the inner layer and the outer layer are horizontally stacked to form multiple layers. The outer layer of cation exchange resin coats the outer side of the inner layer.

In the embodiment of the present application, the inner layer of the filter element support grid 124 is a polyester layer (polybutylene terephthalate cloth, purification accuracy of 5 μm) and a glass fiber layer (glass fiber cloth, The purification accuracy is 2μm), the purification accuracy after the combination of the two is 1μm, and the filtration efficiency for materials with a particle size of 1μm is 99.91%.

The outer layer of the filter element support grid 124 is a double-layer cation exchange resin (cation exchange resin 311) arranged sequentially from the inside to the outside. Similarly, the thickness of the outer filter material of the filter element support grid 124 can be within the range of 1-20mm. Selection, in the embodiment of the present application, the thickness of a single layer of cation exchange resin is 4 mm. The inner layer and the outer layer perform purification and cation exchange on the regeneration liquid, so as to improve the purification effect on the regeneration liquid. The filter material is folded vertically, the purification area is large, and the flux is large. The flux of the first-stage filter element 12 is increased, and the equipment investment is reduced.

The secondary device 2 includes a secondary casing 21 and a secondary filter element 22 fixedly mounted on the secondary casing 21. The shape and structure of the secondary casing 21 is exactly the same as that of the primary casing 11, and the shape and structure of the secondary filter element 22 is the same as that of the primary filter element. 12. The only difference is that the secondary filter element 22 has no outer ion exchange resin filter material, and the end of the connecting pipe 8 away from the primary device 1 is connected to the feed pipe 1105 of the secondary shell 21.

The difference between the secondary device 2 and the primary device 1 is that the filter material of the secondary filter element 22 is different. The filter material of the secondary filter element 22 is a fluorine-containing material, such as polytetrafluoroethylene PTFE, polyvinylidene fluoride PVDF, ECTFE, or PFA, and the filter material is composed of multiple layers. In the embodiment of this application, the filter material of the secondary filter element 22 is vertically stacked two layers of polytetrafluoroethylene (polytetrafluoroethylene cloth, the filtration accuracy is 0.1 μm), and the purification of materials with a particle size of 0.1 μm or more The efficiency is 99.99%.

The implementation principle of Embodiment 1 is: the liquid material flows into the primary shell 11, and after being purified by the primary filter element 12 with polyester and glass fiber as the filter material, it is transported to the secondary shell 21, and then filtered through the fluorine-containing material. The secondary filter element 22 of the filter material is purified, wherein the primary filter element completely filters material particles with a particle size of 10 μm or more, and at the same time, the purification efficiency of material particles with a particle size of 1 μm reaches 99.91%, and the secondary filter element completely filters material particles with a particle size of 2 μm or more. At the same time, the purification efficiency of material particles with a particle size of 1 μm reaches 99.99%, so that after purification, the liquid material with low dust particles and trace metal ion content is output;

The primary device 1 and the secondary device 2 containing different filter materials are arranged in series, and the primary device 1 and the secondary device 2 purify the regeneration liquid, and remove dust particles and trace metals in the regeneration liquid through a systematic purification method Ions, to improve the production process of hydrogen peroxide, due to the dust particles and trace metal ions in the regeneration liquid, a series of problems such as high pressure drop in the hydrogenation tower bed layer, rapid activity decline, increased side reactions, and unstable hydrogen peroxide production.

Example 2:

The difference between the embodiment of the present application and the embodiment 1 lies in that the structure of the filter support grid 124 is different. The inner layer of the filter element support grid 124 adopts a polyester layer (polybutylene terephthalate cloth, purification accuracy 20 μm), a glass fiber layer (glass fiber cloth, purification accuracy 10μm), polyester layer (polybutylene terephthalate cloth, purification accuracy 2μm), the purification accuracy after compounding is 1μm, and the filtration efficiency for 1μm particle size materials is 99.98%.

Example 3:

The difference between the embodiment of the present application and the embodiment 1 lies in that the structure of the filter support grid 124 is different.

The inner layer of the filter element support grid 124 adopts a polyester layer (polybutylene terephthalate cloth, purification accuracy 20 μm), a polyester layer (polybutylene terephthalate cloth) and a polyester layer (polybutylene terephthalate cloth) arranged sequentially along the axis of the primary filter element 12. Glycol ester cloth, the purification accuracy is 10 μm), the filtration accuracy after compounding is 5 μm, and the filtration efficiency for materials with a particle size of 5 μm is 99.91%.

Example 4:

Referring to FIG. 3 , the difference between the embodiment of the present application and the embodiment 1 is that a booster component 7 is also provided in the primary device 1 .

A filter chamber 6 is formed inside the cylindrical filter element itself, and the presence of the filter element end cap 123 makes the filter chamber 6 a blind hole.

The pressurization assembly 7 includes a limit bracket 72 fixedly installed on the side of the partition plate 3 facing away from the installation assembly 5 by bolts, and a liquid guide rod 71 rotatably installed on the limit bracket 72. The liquid guide rod 71 is partially rotatably installed in the filter cavity 6 Inside, the end of the liquid guide rod 71 passes through the upper casing 1102, and the outer peripheral wall of the part of the liquid guide rod 71 placed in the primary shell 11 is provided with a liquid guide groove 74, and the liquid guide groove 74 spirals along the axis of the liquid guide rod 71. Rising setting. The outer peripheral wall of the liquid guide rod 71 is welded with a plurality of fan pieces 73. In the embodiment of the present application, the number of fan pieces 73 is set to 3, and they are arranged symmetrically about the axis center of the liquid guide rod 71. The fan surfaces of the fan pieces 73 are positive to the lumen of the feed tube 1105 .

The limit bracket 72 limits the axial direction of the liquid guide rod 71 to prevent the liquid guide rod 71 from moving during the rotation process. The regeneration liquid enters the primary shell 11 along the feed pipe 1105, and the regeneration liquid acts on the fan 73 , through the fan piece 73 to push the liquid guide rod 71 to rotate, the liquid guide groove 74 on the liquid guide rod 71 pumps the regenerated liquid into the filter chamber 6, so as to increase the flow rate of the regenerated liquid in the filter chamber 6, and realize the regenerated liquid in the filter chamber 6 The supercharging improves the purification efficiency of the primary filter element 12.

Two hydraulic motors 9 are connected between the communicating pipes 8, and the oil inlets and oil outlets of the two hydraulic motors 9 are connected with the communicating pipes 8. The top of the stage housing 21. The two hydraulic motors 9 can be connected in series or in parallel, and in the embodiment of the present application, the two hydraulic motors 9 are connected in series. The output shaft of the hydraulic motor 9 is relatively fixedly connected with the end of the liquid guiding rod 71 protruding from the upper casing 1102 through a coupling.

The regeneration liquid flowing through the communication pipe 8 drives the hydraulic motor 9 to rotate, and the hydraulic motor 9 drives the liquid guiding rod 71 to rotate, so as to realize the boosting of the booster assembly 7 . When the circulation speed of the regeneration liquid in the communication pipe 8 is accelerated, the hydraulic motor 9 rotates faster, which realizes the pressurization of the supercharging device, increases the purification speed of the first-stage filter element 12, and increases the flow speed of the regeneration liquid again, realizing positive feedback.

The implementation principle of Embodiment 2 is: by setting the booster assembly 7, the regenerated liquid enters the first-stage housing 11 along the feed pipe 1105, and the regenerated liquid acts on the fan 73, and the fan 73 pushes the liquid guide rod 71 to rotate, and the guide The liquid guide groove 74 on the liquid rod 71 pumps the regenerated liquid into the filter chamber 6 to increase the flow rate of the regenerated liquid in the filter chamber 6, realize the pressurization of the regenerated liquid in the filter chamber 6, and improve the purification efficiency of the primary filter element 12. The regeneration liquid purified by the primary device 1 flows to the connecting pipe 8, and drives the hydraulic motor 9 to rotate, and the hydraulic motor 9 drives the liquid guide rod 71 to rotate, realizing the double driving of the liquid guide rod 71, and realizing the pressurization component 7 in the filter cavity 6 pressurization of the regeneration fluid.

All of the above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made according to the structure, shape, and principle of the application should be covered by the protection scope of the application. Inside.

Claims (10)

1. A device for effectively protecting catalysts, characterized in that it includes a primary device (1) and a secondary device (2) connected in series with the primary device (1); The primary device (1) includes a primary shell (11) and a primary filter element (12), the filter layer of the primary filter element (12) includes an inner layer and an outer layer, the inner layer is a polyester layer, glass fiber One or two composite layers in the layer, the outer layer is a cation exchange resin layer; The secondary device (2) includes a secondary housing (21) connected to the primary housing (11) and a secondary filter element (22), and the filter layer of the secondary filter element (22) is a fluorine-containing material layer. 2. The device for effectively protecting catalysts according to claim 1, characterized in that: the filter layer of the primary filter element (12) includes at least two inner layers, and the filter layer of the secondary filter element (22) Set as one or two layers. 3. A device for effectively protecting catalysts according to claim 2, characterized in that: the filtration accuracy of each layer of the inner layer of the primary filter element (12) is different; when the filter layer of the secondary filter element (22) is set When there are two layers, the filtering accuracy of each layer is different. 4. The device for effectively protecting the catalyst according to claim 1, characterized in that: the outer wall of the first-stage housing (11) is provided with a vent pipe (1110), lifting lugs (1111), and a feed pipe (1105), discharge pipe (1106), pressure gauge pipe (1107) for installing pressure gauge, drain pipe (1108) and static grounding plate (1109). 5. The equipment for effectively protecting the catalyst according to claim 4, characterized in that: a partition (3) is fixed on the inner wall of the primary shell (11), the feed pipe (1105) and the The discharge pipes (1106) are respectively placed on both sides of the partition (3), the partition (3) is provided with installation holes (4), and the partition (3) is fixedly installed with The primary filter element (12) is fixedly installed on the mounting assembly (5) on the partition (3), and the end of the primary filter element (12) is placed at the mounting hole (4). 6. The device for effectively protecting the catalyst according to claim 5, characterized in that: the installation assembly (5) includes a tie rod (51) fixedly installed on the partition (3), fixedly installed on the The support plate (52) at the end of the pull rod (51) away from the partition (3) and the guide plate (53) placed between the partition (3) and the pull plate, the guide plate (53 ) is connected with the pull rod (51), and a guide hole (54) is opened on the guide plate (53), and the primary filter element (12) passes through the installation hole (4) and the guide hole ( 54) Press against the support plate (52), and the end of the primary filter element (12) is in sealing connection with the hole wall of the installation hole (4). 7. The equipment for effectively protecting the catalyst according to claim 6, characterized in that: a sealing ring (55) is provided on the hole wall of the installation hole (4), and the outer periphery of the primary filter element (12) The wall is pressed against the inner ring of the sealing ring (55). 8. The equipment for effectively protecting catalyst according to claim 5, characterized in that: a filter cavity (6) is formed in the first-stage filter element (12) along the axial direction, and the first-stage device (1) also Including a pressurization assembly (7), the pressurization assembly (7) includes a liquid guide rod (71) rotatably installed in the filter chamber (6), fixedly installed on the separator (3) for The limit bracket (72) for the axial limit of the liquid guide rod (71) and a plurality of fan pieces (73) circumferentially fixed on the liquid guide rod (71), the liquid guide rod (71 ) rotates with the limit bracket (72), the outer wall of the liquid guide rod (71) is spirally provided with a liquid guide groove (74), and the lumen of the feed pipe (1105) faces the fan ( 73) fan settings. 9. The equipment for effectively protecting the catalyst according to claim 8, characterized in that: a communication pipe (8) is connected between the discharge pipe (1106) and the secondary device (2), and the A hydraulic motor (9) is arranged between the communication pipes (8), and the top end of the liquid guiding rod (71) passes through the primary shell (11) and is connected to the hydraulic motor (9) in transmission. 10. A purification method based on the equipment of effectively protecting the catalyst according to any one of claims 1-9, characterized in that, comprising the steps of: S1. Primary purification: use the primary device (1) to perform primary purification and cation exchange on the liquid material to be purified, and input the liquid material to be purified into the primary shell (11) through the primary feed pipe, and the primary The primary filter element (12) inside the casing (11) purifies the liquid material to be purified, and the purified liquid material flows out from the primary discharge pipe; S2. Secondary purification: use the secondary device (2) to perform secondary purification on the liquid material that has been purified by the primary stage, and input the liquid material that has been purified by the primary stage into the secondary shell (21) through the secondary feed pipe, The secondary filter element (22) in the secondary casing (21) purifies the liquid material that has been purified in the primary stage, and the purified liquid material flows out from the secondary discharge pipe.