Integrated heat storage and heat exchange high-temperature ceramic oxygen permeation membrane assembly
By introducing a heat storage layer and low-temperature sealant into the ceramic oxygen-permeable membrane module, a self-heating structure is formed, which solves the problems of high heat exchange energy consumption and reduced sealing effect of high-temperature ceramic oxygen-permeable membranes in the air separation oxygen production process, and achieves efficient and low-cost oxygen production.
Patent Information
- Application Number
- CN202410667544.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-11-28
AI Technical Summary
Existing high-temperature ceramic oxygen-permeable membranes have problems such as high heat exchange energy consumption, reduced sealing effect, and low oxygen purity in the air separation oxygen production process, and require an additional cooling system, resulting in excessively large equipment.
An integrated high-temperature ceramic oxygen-permeable membrane module with heat storage and heat exchange was designed. By introducing a heat storage layer, a positioning layer and a sealing layer into the membrane module, a self-heating structure is formed. The high temperature of the separation zone is used to raise the temperature of the raw gas, and the sealing zone is not affected by the high temperature. Low-temperature sealant is used for sealing.
It achieves efficient heat exchange, reduces feed energy consumption and heat exchange costs, ensures sealing, improves oxygen production and purity, and reduces equipment size.
Smart Images
Figure CN121016413A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of membrane and membrane separation technology, specifically to the design and process flow of a hybrid conductor ceramic oxygen-permeable membrane module. Background Technology
[0002] Oxygen separation using a mixed ion-electron conductor oxygen-permeable membrane is a relatively new preparation process. Compared with traditional cryogenic air separation and pressure swing adsorption, it has advantages such as small footprint, low investment cost, low operating energy consumption, and high product purity. Generally, the operating temperature of the mixed ion-electron conductor oxygen-permeable membrane is 800-1000℃. The mixed ion-electron conductor oxygen-permeable membrane is a type of ceramic membrane with both ionic and electronic conductivity. In the mixed ion-electron conductor oxygen-permeable membrane, oxygen ions are conducted through oxygen vacancies. At the same time, in order to maintain the internal charge balance, electrons are conducted in the opposite direction in the oxygen-permeable membrane. Selective separation of oxygen can be achieved without the need for an external circuit. With the help of this special oxygen vacancy structure, it theoretically has 100% selectivity for oxygen.
[0003] Depending on the specific operating conditions, ceramic oxygen-permeable membranes can be categorized into plate membranes, tubular membranes, and hollow fiber membranes. Plate membranes are generally prepared using isostatic pressing, tubular membranes are primarily prepared using plastic extrusion, while hollow fiber membranes employ a special phase inversion method. There are already examples of industrial oxygen production using these different configurations of ceramic oxygen-permeable membranes, and oxygen generators based on tubular and hollow fiber membranes are gradually maturing.
[0004] Because oxygen-permeable membranes operate in a high temperature range (800-1000℃), and the sealing technology for ceramic oxygen-permeable membranes at high temperatures is relatively immature, existing technologies generally use low-temperature sealing methods (20-300℃). Therefore, additional cooling of the components is required, i.e., an additional heat exchange system is needed. Due to the special working conditions of ceramic oxygen-permeable membranes, an air-cooled circulation mode is generally used, i.e., low-temperature air is blown through the open end of the ceramic oxygen-permeable membrane for cooling. Currently, there is no mature system and process for this heat exchange system. Most of the products on the market use direct air-cooled blowing heat exchange. Therefore, there is an urgent need to develop a membrane module and process for this type of production. Summary of the Invention
[0005] The purpose of this invention is to design a membrane module for air separation and oxygen production using a ceramic oxygen-permeable membrane. By opening an air inlet in the positioning layer located between the heat storage layer and the sealing layer, and supplying the oxygen-containing gas feedstock to be separated, a self-heating structural space can be formed between the separation area and the sealing area of the membrane tube. The high temperature of the separation area is used to heat the feed gas, and the problem of additional cooling required due to the high temperature of the sealing area is avoided. Compared with other types of membrane modules, heat exchange can be performed more efficiently, while reducing the feed heat exchange cost.
[0006] An integrated high-temperature ceramic oxygen-permeable membrane module for heat storage and exchange includes:
[0007] A ceramic oxygen-permeable membrane bundle (6) is located in the shell and includes a first end and a second end. The first end of the ceramic oxygen-permeable membrane bundle (6) is closed.
[0008] And along the direction from the first end to the second end, the ceramic oxygen-permeable membrane bundle (6) is sequentially fitted into the heat storage layer (1), the positioning layer (2), the sealing layer (3), and the vacuum layer (4) on the outside of the second end;
[0009] Furthermore, there is a gap between the heat storage layer (1), the positioning layer (2) and the tube wall of the ceramic oxygen-permeable membrane bundle (6);
[0010] An air inlet (7) is provided on the outside of the positioning layer (2) for supplying oxygen-containing gas raw materials;
[0011] The sealing layer (3) is used to seal the outer wall of the ceramic oxygen-permeable membrane bundle (6);
[0012] A negative pressure device (8) is connected to the vacuum layer (4), and the negative pressure device (8) is connected to the tube channel at the second end of the ceramic oxygen-permeable membrane bundle (6).
[0013] The positioning layer (2) includes a cavity (13) which is connected to the air inlet (7).
[0014] A heat source is provided in the shell in the direction from the heat storage layer (1) toward the second end for heating the ceramic oxygen-permeable membrane bundle (6).
[0015] The ceramic oxygen-permeable membrane in the ceramic oxygen-permeable membrane bundle (6) is a tubular membrane, a hollow fiber membrane, or a multi-channel hollow fiber membrane; the diameter range is 1-10 mm; the center gap between adjacent ceramic oxygen-permeable membranes is 5-20 mm.
[0016] The arrangement of the ceramic oxygen-permeable membrane bundles (6) is selected from one or a combination of several of the following: circular array, matrix arrangement, geometric distribution, and staggered array.
[0017] An air outlet (5) is provided on the heat storage layer (1), and a ceramic oxygen-permeable membrane bundle (6) is sleeved in the air outlet (5).
[0018] The sealing layer (3) is sealed with sealant (12).
[0019] The sealant (12) is a low-temperature sealant made of organic glue, elastic sealant, liquid sealing gasket, sealing putty, etc.
[0020] The air outlet (5) of the heat storage layer (1), the first positioning hole (10) of the positioning layer (2) and the second positioning hole (11) of the sealing layer (3) need to be larger than the diameter of the ceramic oxygen-permeable membrane bundle. Preferably, the diameter of the positioning hole is in the range of 2-20mm.
[0021] The height of the heat storage layer (1) can be selected from 50mm to 200mm depending on different working conditions.
[0022] The thermal conductivity of the materials of the heat storage layer (1) and the positioning layer (2) is less than that of the materials of the sealing layer (3) and the vacuum layer (4).
[0023] The materials of the heat storage layer (1) and the positioning layer (2) are selected from one or more of the following: mullite, alumina, vermiculite, diatomaceous earth, slag wool, asbestos, expanded perlite, etc.
[0024] The materials of the sealing layer (3) and the vacuum layer (4) are selected from one or more of the following: 304 stainless steel, 316L stainless steel, nylon, high-performance nylon, translucent photosensitive resin, transparent photosensitive resin, rubber, PAL material, ABS material, aluminum alloy, titanium alloy, copper, cobalt-chromium alloy, ceramic, gypsum, etc.
[0025] Beneficial effects
[0026] To address the need for high-temperature ceramic oxygen-permeable membranes to operate at high temperatures (800-1000℃) while maintaining low sealing temperatures at the sealing end, this invention proposes an integrated heat storage and exchange system. This system perfectly couples the traditional cooling and heat exchange system, air intake system, and negative pressure system with the membrane and membrane module, forming an integrated heat storage and exchange membrane module. This module can be adjusted according to different operating conditions, making it suitable for a wide range of applications. This solution addresses the problems of high heat exchange energy consumption in traditional high-temperature ceramic oxygen-permeable membrane air separation oxygen production processes, the need to supply large amounts of fresh air (at room temperature) which prevents the heat source from reaching the optimal operating temperature of the oxygen-permeable membrane, leading to reduced oxygen production, the need for an external heat exchange system resulting in excessively large overall equipment, and reduced sealing performance at high temperatures leading to lower oxygen purity. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the membrane module for air separation oxygen production using a ceramic oxygen-permeable membrane according to the present invention.
[0028] Figure 2 This is a schematic diagram showing the connection between the heat storage layer, positioning layer, sealing layer, and vacuum layer of the present invention;
[0029] Figure 3 This is a schematic diagram of the linkage between the heat storage layer and the positioning layer for air intake and exhaust in this invention;
[0030] Figure 4 This is a schematic diagram showing the connection of the ceramic oxygen-permeable membrane bundle, sealing layer, vacuum layer, and negative pressure device of the present invention;
[0031] Figure 5 This is a schematic diagram of the upper end of the heat storage layer and the heat source structure of the present invention; Detailed Implementation
[0032] This invention provides a membrane module for air separation oxygen production using a ceramic oxygen-permeable membrane, comprising a heat storage layer (1), a positioning layer (2), a sealing layer (3), and a vacuum layer (4) connected in sequence, wherein:
[0033] a. The heat storage layer (1) is provided with an air outlet (5), the positioning layer (2) is provided with an air inlet (7) and a positioning hole (10), and the sealing layer (3) is provided with a positioning hole (11) and a ceramic oxygen-permeable membrane bundle (6).
[0034] b. A ceramic oxygen-permeable membrane bundle (6) penetrates the heat storage layer (1), the positioning layer (2) and the sealing layer (3) to the vacuum layer (4), and the vacuum layer (4) is connected to the negative pressure equipment (8);
[0035] The heat storage layer (1) protects the ceramic oxygen-permeable membrane bundle (6);
[0036] c. When the component is running, fresh air enters the component through the positioning layer (2), and after self-heating, it is discharged through the heat storage layer outlet (5). At the same time, the fresh air entering the component provides an oxygen-rich source for the ceramic oxygen-permeable membrane bundle (6).
[0037] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membranes, wherein the ceramic oxygen-permeable membrane bundle (6) is configured as a cylindrical structure, and the ceramic oxygen-permeable membrane includes at least two pieces, configured as a structure with one end closed and the other end open, wherein the open end is connected to the sealing layer (3).
[0038] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membranes can be selected from tubular membranes, hollow fiber membranes, and multi-channel hollow fiber membranes; the diameter range is 1-10mm; and the center-to-center gap between adjacent ceramic oxygen-permeable membranes is 5-20mm.
[0039] The membrane module for air separation oxygen production using ceramic oxygen-permeable membranes described above is characterized in that the arrangement of the ceramic oxygen-permeable membrane bundles (6) can be selected from circular array, matrix arrangement, geometric distribution, staggered array and other arrangement methods.
[0040] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membranes has a heat storage layer (1), a positioning layer (2), a sealing layer (3), and a vacuum layer (4) connected by mechanical extrusion. The sealing layer (3) and the vacuum layer (4) are sealed by plastic extrusion to ensure airtightness. The air outlet (5) of the heat storage layer (1), the positioning hole (10) of the positioning layer (2), and the positioning hole (11) of the sealing layer (3) are all on the same straight line and have the same aperture. The ceramic oxygen-permeable membrane bundle (6) The ceramic oxygen-permeable membrane bundle (6) passes through the positioning layer (2) to the vacuum layer (4) through the air outlet (5), positioning hole (10) and positioning hole (11). The ceramic oxygen-permeable membrane bundle (6) is sealed in the sealing layer (3). The sealing between the ceramic oxygen-permeable membrane bundle (6) and the sealing layer (3) can be achieved by using sealant (12). After the component self-heats, the temperature at the bottom of the component is below 100°C. Therefore, the sealant (12) can preferably be a low-temperature sealant such as organic glue, elastic sealant, liquid sealing gasket, or sealing putty.
[0041] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membranes requires that the outlet hole (5) of the heat storage layer (1), the positioning hole (10) of the positioning layer (2), and the positioning hole (11) of the sealing layer (3) be larger than the diameter of the ceramic oxygen-permeable membrane bundle. Preferably, the diameter of the positioning hole is in the range of 2-20mm. The height of the heat storage layer (1) can be selected in the range of 50mm-200mm depending on different working conditions. At the same time, the heat storage layer (1) covers the ceramic oxygen-permeable membrane bundle (6).
[0042] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membrane has air inlets (7) on both sides of the positioning layer (2). Fresh air enters the feed side of the ceramic oxygen-permeable membrane bundle (6) through the outlet (5) on the heat storage layer (1) via the positioning layer (2). The fresh air cools the area where the sealant is located at the opening end of the ceramic oxygen-permeable membrane bundle (6) in the positioning layer (2). During this process, the fresh air undergoes heat exchange. When it reaches the feed side of the ceramic oxygen-permeable membrane bundle (6) near the outlet (5) of the heat storage layer (1), the temperature of the fresh air can reach 800-950℃. No auxiliary heating is required to preheat the fresh air. At the same time, it provides an oxygen-enriched source for the ceramic oxygen-permeable membrane bundle (6). The air inlet flow rate of the air inlet (7) can be selected in the range of 1-50L / min.
[0043] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membrane has a closed end operating temperature of 800-1000℃. The vacuum layer (4) is provided with an outlet (9) and connected to a negative pressure device (8). The negative pressure device (8) can use an oil-free vacuum pump, etc., with a vacuum degree range of 0.01-0.1MPa.
[0044] The above-mentioned membrane module for air separation oxygen production using ceramic oxygen-permeable membrane has the following characteristics: the heat storage layer (1) is made of a material with good heat insulation properties, preferably including mullite, alumina, vermiculite, diatomaceous earth, slag wool, asbestos, expanded perlite, etc.; the positioning layer (2) is made of the same material as the heat storage layer (1); the sealing layer (3) is made of a material with good heat dissipation performance, preferably including 304 stainless steel, 316L stainless steel, nylon, high-performance nylon, semi-transparent photosensitive resin, transparent photosensitive resin, rubber, PAL material, ABS material, aluminum alloy, titanium alloy, copper, cobalt-chromium alloy, ceramic, gypsum, etc.; and the vacuum layer (4) is made of the same material as the sealing layer (3).
[0045] Example 1:
[0046] This embodiment provides an integrated high-temperature ceramic oxygen-permeable membrane module for heat storage and heat exchange, such as... Figure 1 As shown, it includes 1 heat storage layer; 2 positioning layer; 3 sealing layer; 4 vacuum layer; 5 heat storage layer air outlet; 6 ceramic oxygen-permeable membrane bundle; 7 air inlet; 8 negative pressure equipment; 9 vacuum layer outlet; 10 positioning hole of positioning layer; 11 positioning hole of sealing layer; 12 sealant.
[0047] 1. Preparation of ceramic oxygen-permeable membrane bundles: BSCF materials were prepared according to stoichiometric ratios. BSCF ceramic oxygen-permeable membrane precursors were obtained by solid-state method and phase inversion method. After sintering at the corresponding temperature, BSCF ceramic oxygen-permeable membranes were obtained. A ceramic oxygen-permeable membrane with a diameter of 5 mm was selected (6).
[0048] 2. Component design: A 150mm long heat storage layer (1) is used, and the material is mullite. The positioning layer (2) is also made of mullite. The sealing layer (3) and vacuum layer (4) are made of 3D printed PAL material. The diameter of the heat storage layer vent (5), the positioning hole (10) of the positioning layer and the positioning hole (11) of the sealing layer is 9mm. The center gap between adjacent ceramic oxygen-permeable membranes (6) is 6mm. Each layer of the component is connected by mechanical extrusion. The sealing layer (3) and vacuum layer (4) are sealed by rubber plastic extrusion sealing.
[0049] 3. Integration of the component with the ceramic oxygen-permeable membrane bundle: The sealant is a low-temperature organic rubber sealant, and the feed flow rate is set at 5L / min. The feed energy consumption is reduced by 46% compared with large-volume feed, and the heat exchange cost is reduced by 23% compared with traditional components. During this process, in a 900℃ oxygen-permeable environment, the operating temperature of the component is as follows: the highest temperature at the contact position between the upper end of the heat storage layer (1) and the heat source is 869℃; the highest temperature at the contact position between the lower end of the heat storage layer (1) and the positioning layer (2) is 267℃; the highest temperature at the contact position between the positioning layer (2) and the sealing layer (3) is 42℃; and the highest temperature at the contact position between the sealing layer (3) and the vacuum layer (4) is... The highest temperature was 31℃. The temperature of the component was verified under a negative pressure of 0.01MPa in the vacuum layer (4). At this time, the oxygen flow rate under negative pressure reached 4.5L / min. The highest temperature at the contact position between the upper end of the heat storage layer (1) and the heat source was 876℃. The highest temperature at the contact position between the lower end of the heat storage layer (1) and the positioning layer (2) was 281℃. The highest temperature at the contact position between the positioning layer (2) and the sealing layer (3) was 52℃. The highest temperature at the contact position between the sealing layer (3) and the vacuum layer (4) was 39℃. This met the sealing requirements of using low-temperature sealant, ensuring the sealing performance while significantly reducing energy consumption in the overall process.
[0050] Example 2:
[0051] This embodiment provides an integrated high-temperature ceramic oxygen-permeable membrane module for heat storage and heat exchange, such as... Figure 1 As shown, it includes 1 heat storage layer; 2 positioning layer; 3 sealing layer; 4 vacuum layer; 5 heat storage layer air outlet; 6 ceramic oxygen-permeable membrane bundle; 7 air inlet; 8 negative pressure equipment; 9 vacuum layer outlet; 10 positioning hole of positioning layer; 11 positioning hole of sealing layer; 12 sealant.
[0052] 1. Preparation of ceramic oxygen-permeable membrane bundles: BSCF materials were prepared according to stoichiometric ratios. BSCF ceramic oxygen-permeable membrane precursors were obtained by solid-state method and phase inversion method. After sintering at the corresponding temperature, BSCF ceramic oxygen-permeable membranes were obtained. A ceramic oxygen-permeable membrane with a diameter of 5 mm was selected (6).
[0053] 2. Component design: A 100mm long heat storage layer (1) is adopted, and the material is mullite. The positioning layer (2) is also made of mullite. The sealing layer (3) and vacuum layer (4) are made of 316L stainless steel. The diameter of the heat storage layer vent (5), the positioning hole (10) of the positioning layer and the positioning hole (11) of the sealing layer is 9mm. The center gap between adjacent ceramic oxygen-permeable membranes (6) is 6mm. Each layer of the component is connected by mechanical extrusion. The sealing layer (3) and vacuum layer (4) are sealed by rubber plastic extrusion sealing.
[0054] 3. Integration of the component with the ceramic oxygen-permeable membrane bundle: The sealant is a low-temperature organic rubber sealant, and the feed flow rate is set at 4L / min. The feed energy consumption is reduced by 54% compared with large-volume feed, and the heat exchange cost is reduced by 31% compared with traditional components. During this process, in a 900℃ oxygen-permeable environment, the operating temperature of the component is as follows: the highest temperature at the contact position between the upper end of the heat storage layer (1) and the heat source is 861℃; the highest temperature at the contact position between the lower end of the heat storage layer (1) and the positioning layer (2) is 259℃; the highest temperature at the contact position between the positioning layer (2) and the sealing layer (3) is 39℃; and the highest temperature at the contact position between the sealing layer (3) and the vacuum layer (4) is... The highest temperature was 29℃. The temperature of the component was verified under a negative pressure of 0.01MPa in the vacuum layer (4). At this time, the oxygen flow rate under negative pressure reached 4.1L / min. The highest temperature at the contact point between the upper end of the heat storage layer (1) and the heat source was 872℃. The highest temperature at the contact point between the lower end of the heat storage layer (1) and the positioning layer (2) was 275℃. The highest temperature at the contact point between the positioning layer (2) and the sealing layer (3) was 45℃. The highest temperature at the contact point between the sealing layer (3) and the vacuum layer (4) was 42℃. This met the sealing requirements of using low-temperature sealant, ensuring the sealing performance while significantly reducing energy consumption in the overall process.
[0055] Example 3:
[0056] This embodiment provides an integrated high-temperature ceramic oxygen-permeable membrane module for heat storage and heat exchange, such as... Figure 1 As shown, it includes 1 heat storage layer; 2 positioning layer; 3 sealing layer; 4 vacuum layer; 5 heat storage layer air outlet; 6 ceramic oxygen-permeable membrane bundle; 7 air inlet; 8 negative pressure equipment; 9 vacuum layer outlet; 10 positioning hole of positioning layer; 11 positioning hole of sealing layer; 12 sealant.
[0057] 1. Preparation of ceramic oxygen-permeable membrane bundles: LSCF materials were prepared according to stoichiometric ratios. LSCF ceramic oxygen-permeable membrane precursors were obtained by solid-state method and phase inversion method. After sintering at the corresponding temperature, LSCF ceramic oxygen-permeable membranes were obtained. A ceramic oxygen-permeable membrane with a diameter of 6 mm was selected (6).
[0058] 2. Component design: A 70mm long heat storage layer (1) is adopted, and the material is alumina. The positioning layer (2) is also made of alumina. The sealing layer (3) and vacuum layer (4) are made of 316L stainless steel. The diameter of the heat storage layer vent (5), the positioning hole (10) of the positioning layer and the positioning hole (11) of the sealing layer is 12mm. The center gap between adjacent ceramic oxygen-permeable membranes (6) is 6mm. Each layer of the component is connected by mechanical extrusion. The sealing layer (3) and vacuum layer (4) are sealed by rubber plastic extrusion sealing.
[0059] 3. Integration of the component with the ceramic oxygen-permeable membrane bundle: The sealant is a sealing putty, and the feed flow rate is set at 7L / min. The feed energy consumption is reduced by 42% compared with large feed, and the heat exchange cost is reduced by 19% compared with traditional components. During this process, in an oxygen-permeable environment of 1000℃, the operating temperature of the component is as follows: the highest temperature at the contact position between the upper end of the heat storage layer (1) and the heat source is 972℃, the highest temperature at the contact position between the lower end of the heat storage layer (1) and the positioning layer (2) is 369℃, the highest temperature at the contact position between the positioning layer (2) and the sealing layer (3) is 59℃, and the temperature at the contact position between the sealing layer (3) and the vacuum layer (4) is... The highest temperature was 39℃. The temperature of the component was verified under a negative pressure of 0.01MPa in the vacuum layer (4). At this time, the oxygen flow rate under negative pressure reached 2.2L / min. At this time, the highest temperature at the contact position between the upper end of the heat storage layer (1) and the heat source was 983℃, the highest temperature at the contact position between the lower end of the heat storage layer (1) and the positioning layer (2) was 378℃, the highest temperature at the contact position between the positioning layer (2) and the sealing layer (3) was 65℃, and the highest temperature at the contact position between the sealing layer (3) and the vacuum layer (4) was 48℃. This met the sealing requirements of using low-temperature sealant, ensuring the sealing performance while significantly reducing energy consumption in the overall process.
[0060] Example 4:
[0061] This embodiment provides a membrane module using BSCF ceramic oxygen-permeable membrane bundles coupled with an ozone generator and a micro / nano bubble generator:
[0062] 1. Preparation of ceramic oxygen-permeable membrane bundles: BSCF materials were prepared according to stoichiometric ratios. BSCF ceramic oxygen-permeable membrane precursors were obtained by solid-state method and phase inversion method. After sintering at the corresponding temperature, BSCF ceramic oxygen-permeable membranes were obtained. A ceramic oxygen-permeable membrane with a diameter of 5 mm was selected (6).
[0063] 2. Component design: A 150mm long heat insulation and heat storage layer (1) is adopted, and the material is alumina. The positioning layer (2) is also made of alumina. The sealing layer (3) and vacuum layer (4) are made of 316L stainless steel. The diameter of the heat storage layer vent (5), the positioning hole (10) of the positioning layer and the positioning hole (11) of the sealing layer is 9mm. The center gap between adjacent ceramic oxygen permeable membranes (6) is 4mm. Each layer of the component is connected by mechanical extrusion. The sealing layer (3) and vacuum layer (4) are sealed by rubber plastic extrusion. The feed flow rate is set to 7L / min.
[0064] 3. A membrane module combining a component with a ceramic oxygen-permeable membrane bundle was coupled to an ozone generator to produce ozone. The influence of the ceramic oxygen-permeable membrane bundle on the ozone generator performance was investigated. With an oxygen feed rate of 2 L / min, the purity of the feed oxygen and the ozone yield were measured. When using oxygen (99.92%) prepared by a BSCF hollow fiber oxygen-permeable membrane module as the oxygen source, the ozone generator output reached 300 mg / min. Higher oxygen purity resulted in more oxygen molecules being decomposed into oxygen atoms, thus generating more ozone.
[0065] During this process, under an oxygen-permeable environment of 1000℃, the operating temperature of the component was as follows: the highest temperature at the contact point between the upper end of the heat storage layer (1) and the heat source was 981℃; the highest temperature at the contact point between the lower end of the heat storage layer (1) and the positioning layer (2) was 354℃; the highest temperature at the contact point between the positioning layer (2) and the sealing layer (3) was 72℃; and the highest temperature at the contact point between the sealing layer (3) and the vacuum layer (4) was 52℃. This verified the component temperature under a negative pressure of 0.01MPa in the vacuum layer (4). When the negative pressure oxygen flow rate reaches 5.3 L / min, the highest temperature at the contact point between the upper end of the heat storage layer (1) and the heat source is 983℃, the highest temperature at the contact point between the lower end of the heat storage layer (1) and the positioning layer (2) is 362℃, the highest temperature at the contact point between the positioning layer (2) and the sealing layer (3) is 78℃, and the highest temperature at the contact point between the sealing layer (3) and the vacuum layer (4) is 56℃. This meets the sealing requirements for using low-temperature sealant, ensuring the sealing performance while significantly reducing energy consumption in the overall process.
[0066] 4. A membrane module combining a component with a ceramic oxygen-permeable membrane bundle was coupled with a micro / nano bubble generator to investigate the effect of oxygen production by the ceramic oxygen-permeable membrane bundle module on the dissolved oxygen content in pure water. A blank experiment was also conducted, in which air at the same flow rate was introduced into the micro / nano bubble generator, and the dissolved oxygen content of the water was measured. Initially, the dissolved oxygen content in the pure water increased rapidly upon the introduction of oxygen, but then leveled off over time. Within the same timeframe, the dissolved oxygen content in the pure water was highest when oxygen was supplied using a BSCF hollow fiber oxygen-permeable membrane module, reaching 51.83 mg / L.
[0067] During this process, under an oxygen-permeable environment of 1000℃, the operating temperature of the component was as follows: the highest temperature at the contact point between the upper end of the heat storage layer (1) and the heat source was 963℃; the highest temperature at the contact point between the lower end of the heat storage layer (1) and the positioning layer (2) was 335℃; the highest temperature at the contact point between the positioning layer (2) and the sealing layer (3) was 68℃; and the highest temperature at the contact point between the sealing layer (3) and the vacuum layer (4) was 46℃. This verifies the component temperature under a negative pressure of 0.01MPa in the vacuum layer (4). When the negative pressure oxygen flow rate reaches 5.6 L / min, the highest temperature at the contact point between the upper end of the heat storage layer (1) and the heat source is 972℃, the highest temperature at the contact point between the lower end of the heat storage layer (1) and the positioning layer (2) is 345℃, the highest temperature at the contact point between the positioning layer (2) and the sealing layer (3) is 72℃, and the highest temperature at the contact point between the sealing layer (3) and the vacuum layer (4) is 50℃. This meets the sealing requirements for using low-temperature sealant, ensuring the sealing performance while significantly reducing energy consumption in the overall process.
Claims
1. An integrated heat accumulation and exchange high-temperature ceramic oxygen-permeable membrane module, characterized in that, The application relates to a ceramic oxygen-permeable membrane bundle (6) arranged in a shell, comprising a first end and a second end, wherein the first end of the ceramic oxygen-permeable membrane bundle (6) is closed; and a heat storage layer (1), a positioning layer (2) and a sealing layer (3) and a vacuum layer (4) are sequentially sleeved on the outside of the second end of the ceramic oxygen-permeable membrane bundle (6) along the direction from the first end to the second end; and a gap is left between the heat storage layer (1), the positioning layer (2) and the tube wall of the ceramic oxygen-permeable membrane bundle (6); an air inlet (7) is arranged outside the positioning layer (2) and used for feeding oxygen-containing raw material; the sealing layer (3) is used for sealing the outer wall of the ceramic oxygen-permeable membrane bundle (6); a negative pressure device (8) is connected to the vacuum layer (4) and communicates with the channel in the tube body of the second end of the ceramic oxygen-permeable membrane bundle (6). The positioning layer (2) comprises a cavity (13) which communicates with the air inlet (7). A heat source is arranged in the shell in the direction from the heat storage layer (1) to the second end and is used for heating the ceramic oxygen-permeable membrane bundle (6). The ceramic oxygen-permeable membrane in the ceramic oxygen-permeable membrane bundle (6) is a tubular membrane, a hollow fiber membrane or a multi-channel hollow fiber membrane; the diameter is selected in the range of 1-10 mm; and the gap between the centers of adjacent ceramic oxygen-permeable membranes is 5-20 mm. The arrangement mode of the ceramic oxygen-permeable membrane bundle (6) is selected from one or a combination of the following modes: a circumferential array, a matrix arrangement, a geometric distribution and an interlaced array. An air outlet (5) is arranged on the heat storage layer (1) and the ceramic oxygen-permeable membrane bundle (6) is sleeved in the air outlet (5). The sealing layer (3) is sealed by using sealing glue (12). The sealing glue (12) is low-temperature sealing glue such as organic glue, elastic sealing glue, liquid sealing gasket and sealing putty.
2. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, The air outlet (5) of the heat storage layer (1), the first positioning hole (10) of the positioning layer (2) and the second positioning hole (11) of the sealing layer (3) are larger than the diameter of the ceramic oxygen-permeable membrane bundle, and preferably the diameter of the positioning hole is in the range of 2-20 mm.
3. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, The height of the heat storage layer (1) is selected in the range of 50-200 mm according to different working conditions.
4. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, The thermal conductivity of the materials of the heat storage layer (1) and the positioning layer (2) is smaller than that of the materials of the sealing layer (3) and the vacuum layer (4).
5. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, 6. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, 7. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, 8. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, 9. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein, 10. The integrated heat accumulator and heat exchanger high temperature ceramic oxygen permeable membrane module of claim 1, wherein,