Fluidized bed equipment of catalyst capable of improving catalytic efficiency
By setting up a catalyst pre-separation zone, main separation zone and precipitation device in the fluidized bed equipment, intercepting and recovering micron-scale catalysts, the problems of easy catalyst loss and high operating costs in the prior art are solved, and efficient interception of catalysts and Recycling improves the catalytic efficiency of the fluidized bed reactor.
Patent Information
- Application Number
- CN202420108457.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-16
AI Technical Summary
When using micron-scale catalysts, existing fluidized bed reactors have low catalytic efficiency and high operating costs, and the catalyst is easily lost and cannot be recycled efficiently.
A fluidized bed equipment including a catalyst pre-separation zone, a main separation zone and a precipitation device is designed. The micron-scale catalyst is intercepted and recovered through the catalyst pre-separation zone and the main separation zone, and separated and activated by the precipitation device to achieve high efficiency of the catalyst. Interception and recycling.
The catalyst retention efficiency is improved, the catalyst loss is avoided, the load of the precipitation device is reduced, the catalyst is efficient recycling and operation cost is reduced.
Smart Images
Figure CN222219510U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of wastewater treatment, and in particular to a fluidized bed device of a catalyst capable of improving catalytic efficiency. Background Art
[0002] Fenton oxidation technology is an advanced oxidation process widely used in industrial wastewater treatment. In order to improve the reaction efficiency of Fenton oxidation, it is usually necessary to add a catalyst in actual engineering applications. The catalyst is added in the form of a fixed bed. After a certain period of operation, the catalyst layer is prone to hardening, resulting in reduced catalytic efficiency. In addition, the fixed bed catalyst has a large one-time dosage, resulting in excessively high initial investment costs for the process. The catalyst is applied in the form of a fluidized bed. The catalyst is fluidized in the wastewater, and the wastewater inside the reactor passes over the catalyst surface many times, thereby greatly improving the reaction efficiency of the oxidant and the pollutants in the wastewater, improving the utilization rate of the oxidant and the removal rate of pollutants, and having high reaction efficiency and a smaller equipment footprint. In addition, with the use of micron-sized catalysts, a higher catalytic effect can be achieved under the premise of a smaller dosage, a small amount of catalyst is added, and the equipment investment cost is low.
[0003] However, when the current fluidized bed reactor uses a micron-sized catalyst, the catalytic efficiency of the fluidized bed reactor is low and the operating cost is too high. Utility Model Content
[0004] In view of the above problems, the present application is proposed to provide a fluidized bed device of a catalyst capable of improving catalytic efficiency, which overcomes the above problems or at least partially solves the above problems, comprising:
[0005] A fluidized bed device for a catalyst capable of improving catalytic efficiency comprises a fluidized bed body, wherein the fluidized bed body comprises a reaction zone, a catalyst pre-separation zone arranged above the reaction zone, and a catalyst main separation zone arranged above the catalyst pre-separation zone;
[0006] The water outlet end of the fluidized bed body is connected to the precipitation device, the water outlet end of the precipitation device is connected to the water inlet end of the reflux pipe, and the water outlet end of the reflux pipe is connected to the reaction zone;
[0007] When wastewater enters the fluidized bed body, the catalyst in the fluidized bed passes through the catalyst pre-separation zone and the catalyst main separation zone in sequence with the wastewater, and the remaining catalyst enters the sedimentation device with the water flow. The catalyst after sedimentation and separation is re-added to the fluidized bed body through the reflux pipe.
[0008] Preferably, a plurality of folding plate groups consisting of two folding plates inclined against each other are provided in the catalyst pre-separation zone.
[0009] Preferably, the folding plate group is provided with at least one layer.
[0010] Preferably, when there are at least two layers of the folding plate groups, the folding plate groups in different layers form different angles.
[0011] Preferably, the catalyst main separation zone is filled with filter material.
[0012] Preferably, the filter material is at least one of polyurethane sponge filter material and fiber bundle filter material.
[0013] Preferably, it further comprises a catalyst activation device, wherein the water inlet end of the catalyst activation device is connected to the water outlet end of the precipitation device, and the water outlet end of the catalyst activation device is connected to the water inlet end of the reflux pipe.
[0014] Preferably, the fluidized bed body further includes a water inlet pipe arranged at the bottom of the fluidized bed and a water outlet pipe arranged at the top of the fluidized bed.
[0015] Preferably, an aeration pipe is provided above the water inlet pipe.
[0016] Preferably, a drain outlet is provided on the top of the sedimentation device.
[0017] This application has the following advantages:
[0018] In the embodiment of the present application, relative to the problem of low catalytic efficiency when using micron-sized catalysts in the existing fluidized bed reactor, the present application provides a solution for intercepting and recycling the catalyst through a catalyst pre-separation zone, a main separation zone and a precipitation device, specifically: comprising a fluidized bed body, the fluidized bed body including a reaction zone, a catalyst pre-separation zone arranged above the reaction zone and a catalyst main separation zone arranged above the catalyst pre-separation zone; the water outlet end of the fluidized bed body is connected to the precipitation device, the water outlet end of the precipitation device is connected to the water inlet end of the reflux pipe, and the water outlet end of the reflux pipe is connected to the reaction zone; when wastewater enters the fluidized bed body, the catalyst in the fluidized bed passes through the catalyst pre-separation zone and the catalyst main separation zone in sequence with the wastewater, and the remaining catalyst enters the precipitation device with the water flow, and the catalyst after precipitation and separation is re-added to the fluidized bed body through the reflux pipe. Most of the micron-sized catalysts are intercepted by the catalyst pre-separation zone and the catalyst main separation zone, and the interception efficiency of the catalyst is greater than 99%, which effectively avoids the loss of the catalyst and greatly reduces the precipitation load of the subsequent precipitation device. A small amount of lost catalyst can be separated by a sedimentation device and then returned to the reaction zone, thereby achieving efficient retention and recycling of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0020] Figure 1 It is a structural schematic diagram of a fluidized bed device of a catalyst that can improve catalytic efficiency provided in one embodiment of the present application.
[0021] The reference numerals in the drawings of the specification are as follows:
[0022] 1. Water inlet pipe; 2. Aeration pipe; 3. Reflux pipe; 4. Reaction zone; 5. Catalyst pre-separation zone; 6. Catalyst main separation zone; 7. Water outlet pipe; 8. Sedimentation device; 9. Water outlet of the sedimentation device; 10. Catalyst activation device; 11. Drainage outlet of the sedimentation device. DETAILED DESCRIPTION
[0023] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0024] The inventors analyzed the prior art and found that when the current fluidized bed reactor uses a micron-sized catalyst, the catalyst retention effect is poor, the catalyst is easily lost, and the catalyst cannot be efficiently recycled, resulting in a decrease in the catalytic efficiency of the fluidized bed reactor and an increase in operating costs.
[0025] Reference Figure 1 , showing a fluidized bed device of a catalyst capable of improving catalytic efficiency provided in an embodiment of the present application, comprising a fluidized bed body, wherein the fluidized bed body comprises a reaction zone 4, a catalyst pre-separation zone 5 arranged above the reaction zone 4, and a catalyst main separation zone 6 arranged above the catalyst pre-separation zone 5;
[0026] The water outlet end of the fluidized bed body is connected to the sedimentation device 8, the water outlet end 9 of the sedimentation device is connected to the water inlet end of the reflux pipe 3, and the water outlet end of the reflux pipe 3 is connected to the reaction zone 4;
[0027] When wastewater enters the fluidized bed body, the catalyst in the fluidized bed passes through the catalyst pre-separation zone 5 and the catalyst main separation zone 6 in sequence with the wastewater, and the remaining catalyst enters the sedimentation device 8 with the water flow. The catalyst after sedimentation and separation is re-added to the fluidized bed body through the reflux pipe 3.
[0028] In the embodiments of the present application, with respect to the problem of low catalytic efficiency when using micron-sized catalysts in existing fluidized bed reactors, the present application provides a solution for intercepting and recycling the catalyst through a catalyst pre-separation zone, a main separation zone and a precipitation device, specifically: comprising a fluidized bed body, the fluidized bed body comprising a reaction zone 4, a catalyst pre-separation zone 5 arranged above the reaction zone 4 and a catalyst main separation zone 6 arranged above the catalyst pre-separation zone 5; the water outlet end of the fluidized bed body is connected to a precipitation device 8, the water outlet end 9 of the precipitation device is connected to the water inlet end of a reflux pipe 3, and the water outlet end of the reflux pipe 3 is connected to the reaction zone 4; when wastewater enters the fluidized bed body, the catalyst in the fluidized bed passes through the catalyst pre-separation zone 5 and the catalyst main separation zone 6 in sequence with the wastewater, and the remaining catalyst enters the precipitation device 8 with the water flow, and the catalyst after precipitation and separation is re-added to the fluidized bed body through the reflux pipe 3. Most of the micron-sized catalysts are intercepted through the catalyst pre-separation zone and the catalyst main separation zone, and the catalyst interception efficiency is greater than 99%, which effectively avoids the loss of catalysts and greatly reduces the precipitation load of the subsequent precipitation device. A small amount of lost catalyst can be separated by the precipitation device and then returned to the reaction zone, achieving efficient interception and recycling of the catalyst.
[0029] Next, a fluidized bed device of a catalyst capable of improving catalytic efficiency in each exemplary embodiment of the present application will be further described.
[0030] In this embodiment, a plurality of folding plate groups consisting of two folding plates inclined against each other are arranged in the catalyst pre-separation zone 5 .
[0031] It should be noted that the folding plate group allows the catalyst passing through to be pre-separated under the action of gravity. The folding plate group is in a "human" shape, and the folding plates that are inclined and abutted against each other form an angle of a certain angle.
[0032] In this embodiment, the folding plate group is provided with at least one layer.
[0033] It should be noted that, in the same layer, the folding plate group covers the entire cross section of the fluidized bed body, and can evenly intercept the catalyst flowing through the catalyst pre-separation zone 5. When multiple layers of folding plate groups are provided, the catalyst pre-separation can be more thorough. In order to balance the pre-separation effect and cost, the present embodiment preferably provides two layers of folding plate groups.
[0034] In this embodiment, when there are at least two layers of the folding plate groups, the folding plate groups in different layers form different angles.
[0035] It should be noted that when the folding plate group is provided with two or more layers, the angles of the folding plate groups between different layers may be the same or different. In order to improve the catalyst separation effect, the angles of the folding plate groups between different layers are preferably different in this embodiment. At this time, the number of folding plate groups between different layers is also different, but the folding plate groups of each layer need to cover the cross-section of the fluidized bed body.
[0036] In a specific implementation, the catalyst pre-separation zone 5 is divided into two layers, the lower layer folding plate group is set to 3 groups, the angle of the folding plate group is 90°, and the partition length is 600mm; the upper layer folding plate group is set to 6 groups, the angle of the folding plate group is 60°, and the partition length is 400mm.
[0037] In this embodiment, the catalyst main separation zone 6 is filled with filter material.
[0038] In this embodiment, the filter material is at least one of polyurethane sponge filter material and fiber bundle filter material.
[0039] It should be noted that, as the water volume continues to increase, the micron-sized catalyst flows through the catalyst main separation zone 6 filled with filter material. The catalyst main separation zone 6 is filled with filter material of a certain thickness, which can intercept most of the catalyst.
[0040] Polyurethane sponge filter material and fiber bundle filter material are both soft filter materials. Polyurethane sponge filter material is a polyurethane material with a sponge-like structure, which has good filtering performance and adsorption capacity. Fiber bundle filter material is a fiber bundle made of polyester chips after processing, which has the advantages of large specific surface area, variable gaps and no clogging.
[0041] In a specific implementation, the catalyst main separation zone 6 is filled with polyurethane sponge filter material and fiber bundle filter material, the thickness of the polyurethane sponge filter material is 1000 mm, and the pore size of the polyurethane sponge is 30-80 PPI.
[0042] In this embodiment, a catalyst activation device 10 is further included, wherein the water inlet end of the catalyst activation device 10 is connected to the water outlet end 9 of the precipitation device, and the water outlet end of the catalyst activation device 10 is connected to the water inlet end of the reflux pipe 3 .
[0043] It should be noted that a small amount of lost catalyst flows with water into the catalyst precipitation device 8 for precipitation and separation. The catalyst after precipitation and separation is pumped into the catalyst activation device 10 through the water outlet end 9 of the precipitation device. The catalyst activation device 10 is provided with a stirring paddle. The chemically activated catalyst is re-added to the reaction zone 4 of the fluidized bed body through the reflux pipe 3, thereby realizing efficient retention and recycling of the catalyst.
[0044] In a specific implementation, a drain port 11 is provided on the top of the sedimentation device 8 , and the wastewater after sedimentation treatment is discharged through the drain port 11 .
[0045] In this embodiment, the fluidized bed body further includes a water inlet pipe 1 arranged at the bottom of the fluidized bed and a water outlet pipe 7 arranged at the top of the fluidized bed.
[0046] In this embodiment, an aeration pipe 2 is provided above the water inlet pipe 7 .
[0047] It should be noted that the wastewater to be treated is pumped into the fluidized bed body through the sewage inlet pipe 1 by a water pump, and the catalyst in the fluidized bed body is in a fluidized state under the aeration condition of the fluidized bed aeration pipe 2. The wastewater inside the fluidized bed body passes through the catalyst surface multiple times in the reaction zone 4, and the mass transfer efficiency is greatly improved, thereby greatly improving the reaction efficiency of the oxidant and the pollutants in the wastewater, and improving the utilization rate of the oxidant and the removal rate of pollutants. A small amount of lost catalyst flows out through the outlet pipe 7 to the precipitation device 8.
[0048] In a specific implementation, a plurality of aeration holes are evenly distributed on the aeration pipe 2. The aeration pipe 2 adopts a perforated aeration method, and the diameter of the water distribution hole on the aeration pipe 2 is 30 mm.
[0049] Working principle:
[0050] The wastewater to be treated is pumped into the fluidized bed body through the water inlet pipe 1 by a water pump. The catalyst in the fluidized bed body is in a fluidized state under the aeration conditions of the aeration pipe 2. The wastewater inside the fluidized bed body passes through the catalyst surface multiple times in the reaction zone 4, and the mass transfer efficiency is greatly improved, thereby greatly improving the reaction efficiency of the oxidant and the pollutants in the wastewater, and improving the utilization rate of the oxidant and the removal rate of pollutants. The catalyst in the reaction zone 4 of the fluidized bed body first passes through the catalyst pre-separation zone 5 with the rising water flow, and the catalyst is pre-separated under the action of gravity. The micron-sized catalyst that continues to rise with the water volume flows through the catalyst main separation zone 6 filled with filter material, and most of the catalyst is intercepted. A small part of the lost catalyst flows through the outlet pipe 7 with the water into the catalyst precipitation device 8 for precipitation separation. The catalyst after precipitation separation is pumped into the catalyst activation device 10 through the outlet end 9 of the precipitation device, and the catalyst after chemical activation is re-added to the fluidized bed body through the catalyst reflux pipe 3, realizing efficient interception and recycling of the catalyst. The treated wastewater is discharged through the drain port 11 of the precipitation device.
[0051] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.
[0052] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.
[0053] The above is a detailed introduction to a fluidized bed device for a catalyst that can improve catalytic efficiency provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A fluidized bed device for a catalyst capable of improving catalytic efficiency, characterized in that: The fluidized bed comprises a fluidized bed body, wherein the fluidized bed body comprises a reaction zone, a catalyst pre-separation zone arranged above the reaction zone, and a catalyst main separation zone arranged above the catalyst pre-separation zone; The water outlet end of the fluidized bed body is connected to the precipitation device, the water outlet end of the precipitation device is connected to the water inlet end of the reflux pipe, and the water outlet end of the reflux pipe is connected to the reaction zone; When wastewater enters the fluidized bed body, the catalyst in the fluidized bed passes through the catalyst pre-separation zone and the catalyst main separation zone in sequence with the wastewater, and the remaining catalyst enters the sedimentation device with the water flow. The catalyst after sedimentation and separation is re-added to the fluidized bed body through the reflux pipe.
2. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 1, characterized in that: A plurality of folding plate groups consisting of two folding plates inclined against each other are arranged in the catalyst pre-separation zone.
3. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 2, characterized in that: The folding plate group is provided with at least one layer.
4. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 3, characterized in that: When there are at least two layers of the folding plate groups, the folding plate groups in different layers form different angles.
5. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 1, characterized in that: The catalyst main separation zone is filled with filter material.
6. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 1, characterized in that: It also includes a catalyst activation device, wherein the water inlet end of the catalyst activation device is connected to the water outlet end of the precipitation device, and the water outlet end of the catalyst activation device is connected to the water inlet end of the reflux pipe.
7. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 1, characterized in that: The fluidized bed body also includes a water inlet pipe arranged at the bottom of the fluidized bed and a water outlet pipe arranged at the top of the fluidized bed.
8. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 7, characterized in that: An aeration pipe is arranged above the water inlet pipe.
9. The fluidized bed device of the catalyst capable of improving catalytic efficiency according to claim 1, characterized in that: A drainage outlet is arranged on the top of the sedimentation device.