Pressure equalizing gas inlet spiral membrane module tank

Abstract

A kind of equalizing air intake spiral membrane module box, including air intake pressure structure, channel structure and box structure;The air intake pressure structure includes first shell, with first port and second port;The first port is equipped with first sealing baffle, the top of the first sealing baffle is equipped with rectangular air inlet;The channel structure includes second shell, with third port and fourth port;The third port is equipped with second sealing baffle, the fourth port is equipped with air equalizing block between the second port;Several evenly distributed transverse air passages are arranged in the air equalizing block;Rectangular adjusting plate is arranged in the second shell, the height of the adjusting plate gradually increases from the fourth port to the third port;The top plate of the second shell is equipped with several through holes, the top of each through hole is fixedly provided with spiral membrane module, and each through hole is connected with the air inlet end of corresponding spiral membrane module;The box structure includes third shell opening downward, is fixed to the top of the second shell, and covers each spiral membrane module.

Description

Technical Field

[0001] This invention belongs to the field of oxygen enrichment manufacturing technology, and in particular to a pressure equalization air intake spiral wound membrane module box. Background Technology

[0002] Currently, oxygen-enriched combustion technology has received attention and development in countries such as the United States, Japan, Canada, Australia, the United Kingdom, Germany, France, and the Netherlands. my country has also actively conducted research on oxygen-enriched combustion technology and achieved many significant results. There are currently three main methods for producing oxygen-enriched air: cryogenic method, pressure swing adsorption (PSA) separation, and membrane separation method. The principle of membrane oxygen production is based on the different rates at which different gas molecules pass through a selective polymer separation membrane. Driven by a pressure difference, oxygen molecules in the air pass through the separation membrane more quickly to obtain oxygen-enriched air. Generally, a fan and a vacuum pump maintain the pressure difference across the oxygen-enriched membrane. The fan delivers dust-removed natural air to the high-pressure side of the oxygen-enriched membrane module, while a vacuum pump reduces the pressure to a certain level on the low-pressure side of the module. The permeate gas discharged from the vacuum pump is the oxygen-enriched air. The non-permeable gas (i.e., nitrogen-enriched air) discharged from the oxygen-enriched membrane module is directly released into the atmosphere. When using spiral wound membrane modules to produce oxygen-enriched products, a chamber structure is typically used. This structure is affected by the location, dimensions, shape, air volume, air pressure, and volume of the air inlet. Without special treatment, it is difficult to ensure that all membrane modules inside the chamber have the same air pressure and air volume. For example, membrane modules near the air inlet may experience greater pressure than those on either side, which is detrimental to the operation of the system. Summary of the Invention

[0003] In view of the above problems, the purpose of this invention is to provide a pressure-equalizing air intake spiral membrane module box, which can keep the air intake pressure and air intake volume of each membrane module consistent, thereby improving the operating efficiency of the system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pressure equalization air intake spiral membrane module box includes an air intake and compression structure, a channel structure with an equalization channel and an inclined adjustment plate, and a box structure on which a spiral membrane module is installed.

[0006] The air intake and compression structure includes a first outer shell in the shape of a square cylinder, having a first port and a second port; the first port is provided with a rectangular first sealing baffle, and the top of the first sealing baffle is provided with a rectangular air inlet, which is connected to an air intake pipe;

[0007] The channel structure includes a rectangular second outer shell with a third port and a fourth port. The third port has a rectangular second sealing baffle, and a gas equalization block is located between the fourth port and the second port. The gas equalization block is cuboid in shape and has several evenly distributed transverse air passages running through it. Both ends of the gas equalization block are located inside the second port and the fourth port, respectively, sealing both ports. A rectangular adjusting plate is located inside the second outer shell. The width of the adjusting plate corresponds to the width of the second outer shell, and one end of the adjusting plate is fixedly connected to the bottom plate of the second outer shell near the fourth port, while the other end is fixedly connected to the inner side of the second sealing baffle. This allows the height of the adjusting plate to gradually increase from the fourth port to the third port, forming a gas equalization channel in the space above the adjusting plate. The top plate of the second outer shell has several through holes, and a spiral membrane assembly is fixedly mounted on the top of each through hole. Each through hole is connected to the air inlet end of the corresponding spiral membrane assembly.

[0008] The housing structure includes a third outer shell with an opening facing downwards, which is fixed to the top of the second outer shell and covers each roll-up membrane assembly.

[0009] Furthermore, a compressor plate is provided at the center of the top surface of the first outer shell extending into the interior of the first outer shell, and the compressor plate has an S-shaped longitudinal section.

[0010] Furthermore, the width and height of the first shell and the second shell are equal.

[0011] Furthermore, within the third housing, the number of laterally arranged spiral wound membrane assemblies is less than the number of longitudinally arranged spiral wound membrane assemblies.

[0012] Furthermore, the angle between the air compressor plate and the horizontal direction along the air intake direction gradually increases from zero degrees to 90 degrees and then gradually decreases back to zero degrees.

[0013] Furthermore, the length of the first outer casing is 1500 mm.

[0014] Furthermore, in the longitudinal section of the gas equalization block, the mesh size of the transverse air passage is 4x40.

[0015] Furthermore, the angle between the adjustment plate and the horizontal direction is 3 degrees.

[0016] The beneficial effects of the present invention are: the pressure equalization air intake spiral membrane module box of the present invention, through the distribution and arrangement of membrane modules and the optimization of the cross-section of the air intake channel, can make the air intake pressure and air intake volume of each spiral membrane module consistent, thereby improving the operating efficiency of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the pressure equalization air intake spiral membrane module box of the present invention.

[0018] Figure 2 This is a front view of the pressure equalization air intake spiral membrane module box of the present invention.

[0019] Figure 3 This is a top view of the pressure equalization air intake spiral membrane module box of the present invention.

[0020] Figure 4 yes Figure 2 A cross-sectional view along the AA direction. Detailed Implementation

[0021] The structure of the present invention and the desired technical effects will be described below with reference to specific embodiments and accompanying drawings. However, the selected embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0022] like Figures 1-3 As shown, the present invention provides a pressure equalization air intake spiral membrane module box, including an air intake and compression structure 1, a channel structure 2 with an air equalization channel and an inclined adjustment plate, and a box structure 3 with a certain number of spiral membrane modules installed inside. The air intake and compression structure 1 and the channel structure 2 together constitute the pressure equalization air intake channel of the box structure 3, which can be used in cement rotary kilns, lime rotary kilns and other occasions that require oxygen-enriched air for combustion and calcination.

[0023] The air intake and compression structure 1 includes a first cylindrical outer shell 11 with a first port 111 and a second port 112. The first port 111 has a rectangular first sealing baffle 12, and the top of the first sealing baffle 12 has a rectangular air inlet 13, which connects to an air intake pipe (not shown in the figure, representing prior art). Through this air intake pipe, purified air, after gaseous moisture removal, can be introduced into the subsequent channel structure 2, and then supplied to the various spiral wound membrane modules within the housing structure 3. Preferably, the length of the first outer shell 11 is 1500 mm (taking the case of 168 membrane modules installed as an example, arranged in an 8x21 pattern, with each membrane module producing 30 standard cubic meters of oxygen-enriched air per hour, the same below).

[0024] The channel structure 2 includes a cylindrical second outer shell 21 with a third port 211 and a fourth port 212. The third port 211 is provided with a rectangular second sealing baffle 22, and an air equalization block 23 is provided between the fourth port 212 and the second port 212. Figure 4 As shown, the air equalization block 23 is rectangular in shape, with several evenly distributed transverse air channels 24 running through its interior. Preferably, the mesh size of the transverse air channels 24 on the longitudinal section of the air equalization block 23 is 4x40. The two ends of the air equalization block 23 are located within the second port 112 and the fourth port 212, respectively, and close the second port 112 and the fourth port 212. Preferably, the width and height of the first outer shell 11 and the second outer shell 21 are equal, making their longitudinal sections identical.

[0025] The second housing 21 contains a common air intake for supplying air to all spiral wound membrane modules. To ensure uniform air pressure entering each module, a rectangular adjusting plate 25 is provided within the second housing 21. The width of the adjusting plate 25 corresponds to the width of the second housing 21. One end of the adjusting plate 25 is fixedly connected to the bottom plate of the second housing 21 near the fourth port 212, and the other end is fixedly connected to the inner side of the second sealing baffle 22. This causes the height of the adjusting plate 25 to gradually increase from the fourth port 212 to the third port 211, thereby gradually reducing the gas flow space inside the second housing 21 and forming a uniform airflow channel above the adjusting plate. Preferably, the angle between the adjusting plate 25 and the horizontal direction is 3 degrees. The top plate of the second housing 21 is provided with several through holes, and a spiral membrane assembly (not shown in the figure, which is the prior art) is fixedly installed on the top of each through hole. Each spiral membrane assembly is fixedly connected to the top plate of the second housing 21, and each through hole is connected to the air inlet end of the corresponding spiral membrane assembly, so as to supply air in the second housing 21 to each spiral membrane assembly for oxygen enrichment.

[0026] The housing structure 3 includes a downward-facing third outer shell 31, fixed to the top of the second outer shell 21, which covers each spiral wound membrane assembly for easy manufacturing, transportation, and installation. Within the third outer shell 31, the number of laterally arranged spiral wound membrane assemblies is less than the number of longitudinally arranged spiral wound membrane assemblies (lateral: i.e., ...). Figure 3 The direction parallel to the air intake 13; longitudinal: i.e. Figure 3 (In the direction perpendicular to the air inlet 13). The third housing 31 is provided with an air outlet, and the outlets of each spiral wound membrane assembly are connected to the air outlet to deliver oxygen-enriched air to the next device.

[0027] A compressor plate 14 extends from the center of the top surface of the first housing 11 into the interior of the housing 11. The compressor plate 14 has an S-shaped longitudinal section, which is used to regulate the air intake, thereby improving the uniformity of the gas entering each spiral wound membrane module in the longitudinal direction and also improving the uniformity along the streamline direction. The angle between the compressor plate 14 and the horizontal direction gradually increases from zero degrees to 90 degrees and then gradually decreases back to zero degrees. That is, the angle between the plane tangent to the curved surface of the compressor plate 14 and the horizontal direction changes from zero degrees to 90 degrees and then gradually decreases back to zero degrees along the air intake direction.

[0028] The working process of this invention is as follows: After purification and removal of gaseous moisture, the air is connected to the air inlet 13 of the first housing 11 through the air inlet pipe, and enters the second housing 21 through the transverse air passage of the S-shaped air compressor plate 14 and the air equalization block 23 in sequence. Since the air inlet of the second housing 21 adopts the inclined adjustment plate 25, the longitudinal cross-sectional area of ​​the air inlet in the second housing 21 gradually decreases from the fourth port 212 to the third port 211, so that the air pressure entering each through hole is basically the same, and thus the air pressure entering each spiral membrane module is also the same, which is beneficial to improving the working efficiency of the entire system.

[0029] The present invention relates to a pressure-equalizing inlet spiral membrane module box, which, through the distribution and arrangement of membrane modules and the optimization of the cross-section of the air inlet, can ensure that the air inlet pressure and air volume of each spiral membrane module are consistent, thereby improving the operating efficiency of the system.

[0030] This invention is defined by the claims. However, based on this, those skilled in the art can make various obvious changes or modifications, all of which should be within the main spirit and protection scope of this invention.

Claims

1. A pressure-equalizing air-inlet spiral membrane module box, characterized in that, It includes an air intake and compression structure, a channel structure with an air equalization channel and an inclined adjustment plate, and a box structure with a spiral membrane module installed. The air intake and compression structure includes a first outer shell in the shape of a square cylinder, having a first port and a second port; the first port is provided with a rectangular first sealing baffle, and the top of the first sealing baffle is provided with a rectangular air inlet, which is connected to an air intake pipe; The channel structure includes a rectangular second outer shell with a third port and a fourth port. The third port has a rectangular second sealing baffle, and a gas equalization block is located between the fourth port and the second port. The gas equalization block is cuboid in shape and has several evenly distributed transverse air passages running through it. Both ends of the gas equalization block are located inside the second port and the fourth port, respectively, sealing both ports. A rectangular adjusting plate is located inside the second outer shell. The width of the adjusting plate corresponds to the width of the second outer shell, and one end of the adjusting plate is fixedly connected to the bottom plate of the second outer shell near the fourth port, while the other end is fixedly connected to the inner side of the second sealing baffle. This allows the height of the adjusting plate to gradually increase from the fourth port to the third port, forming a gas equalization channel in the space above the adjusting plate. The top plate of the second outer shell has several through holes, and a spiral membrane assembly is fixedly mounted on the top of each through hole. Each through hole is connected to the air inlet end of the corresponding spiral membrane assembly. The housing structure includes a third outer shell with an opening facing downwards, which is fixed to the top of the second outer shell and covers each roll-up membrane assembly.

2. The pressure-equalizing air-inlet spiral membrane module box according to claim 1, characterized in that: A compressor plate is provided in the middle of the top surface of the first outer shell, extending into the interior of the first outer shell. The compressor plate has an S-shaped longitudinal section.

3. The pressure-equalizing air-inlet spiral membrane module box according to claim 1 or 2, characterized in that: The width and height of the first shell and the second shell are equal.

4. The pressure-equalizing air-inlet spiral membrane module box according to claim 1 or 2, characterized in that: Within the third housing, the number of laterally arranged spiral wound membrane assemblies is less than the number of longitudinally arranged spiral wound membrane assemblies.

5. The pressure-equalizing air-inlet spiral membrane module box according to claim 1 or 2, characterized in that: The length of the first outer shell is 1500 mm.

6. The pressure-equalizing air-inlet spiral membrane module box according to claim 1 or 2, characterized in that: On the longitudinal section of the gas equalization block, the mesh size of the transverse air passage is 4x40.

7. The pressure-equalizing air-inlet spiral membrane module box according to claim 1 or 2, characterized in that: The angle between the adjusting plate and the horizontal direction is 3 degrees.

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