Demineralized water deep deoxidizing membrane assembly suitable for gas-steam combined cycle generator set

Abstract

The invention discloses a desalted water deep deoxidization membrane assembly suitable for a gas-steam combined cycle generator set, which comprises a membrane support frame and a plurality of flat membranes, the flat membranes are supported and fixed by the membrane support frame, a plurality of membrane holes are formed in the flat membranes, and the membrane holes are communicated with the membrane support frame. The flat diaphragm prevents liquid water from passing through the diaphragm holes through surface tension of the flat diaphragm and allows oxygen to pass through the diaphragm holes, one side of the flat diaphragm is a water side runner opening adhesive layer, and the other side of the flat diaphragm is a gas side runner opening adhesive layer. According to the desalted water deep deoxidization membrane assembly suitable for the gas-steam combined cycle generator set, the tolerable temperature to inlet water can reach 160 DEG C or above, the tolerable degree to inlet water pressure can reach 2 Mpa, the membrane assembly is suitable for a desalted water deep deoxidization process with the dissolved oxygen content being lower than 100 ppb, the overall structure is simple and reasonable, and the membrane assembly is suitable for large-scale popularization and application. The method has great popularization and application values.

Description

Technical Field

[0001] This invention belongs to the field of deoxygenation membrane component technology, specifically relating to a deep deoxygenation membrane component adapted to demineralized water in gas-fired steam combined cycle generator sets. Background Technology

[0002] Most existing deoxygenation membrane modules are hollow fiber membrane contactors. However, when using hollow fiber membrane contactors for deoxygenation, there are high requirements for the inlet water temperature and inlet water pressure. When the inlet water temperature is greater than 40℃ or the inlet water pressure is greater than 0.6Mpa, the hollow fiber membrane contactor cannot withstand it.

[0003] Based on this, the present invention discloses a deep deoxygenation membrane component for demineralized water in a gas-fired steam combined cycle generator set, which can withstand inlet water temperatures of 160°C and above, and can withstand inlet water pressures of up to 2 MPa. Summary of the Invention

[0004] To address the problems in the prior art, the present invention aims to provide a deep deoxygenation membrane assembly for demineralized water in gas-fired steam combined cycle generator sets.

[0005] To achieve the above objectives and technical effects, the technical solution adopted by this invention is as follows: A deep deoxygenation membrane assembly for demineralized water in a gas-steam combined cycle generator set includes a membrane support frame and several flat membranes. The membrane support frame supports and fixes the flat membranes. Several membrane pores are formed on the flat membranes. The flat membranes prevent liquid water from passing through the membrane pores by their surface tension, while allowing oxygen to pass through the membrane pores. One side of the flat membrane has a water-side flow channel adhesive layer, and the other side of the flat membrane has a gas-side flow channel adhesive layer.

[0006] Furthermore, the diaphragm support frame has a cubic mesh structure, and two adjacent diaphragm support frames together compress and fix a single flat diaphragm.

[0007] Furthermore, the diaphragm support frame is made of titanium with a thickness of 5-12mm.

[0008] Furthermore, the flat sheet membrane is made of hydrophobic PTFE material with a thickness of 0.1-0.5 mm.

[0009] Furthermore, the pore size of the membrane is 20-50 nm.

[0010] Furthermore, the end face of the flat diaphragm is sealed by a flat diaphragm sealing diaphragm.

[0011] Furthermore, the water-side flow channel adhesive layer is provided with multiple water-side flow channels for liquid water to flow through.

[0012] Furthermore, the water-side flow channel adhesive layer has multiple water-side flow channels arranged in a double layer, with an opening diameter of 1-5mm.

[0013] Furthermore, the gas-side flow channel adhesive layer has multiple gas-side flow channels for oxygen to pass through.

[0014] Furthermore, the gas-side flow channel adhesive layer has multiple gas-side flow channels arranged in a single layer, with an opening diameter of 4-8 mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention discloses a deep deoxygenation membrane component for demineralized water in gas-steam combined cycle generator sets. It can withstand inlet water temperatures of 160°C and above, and inlet water pressures of up to 2 MPa. It is suitable for deep deoxygenation processes in demineralized water with dissolved oxygen content below 100 ppb. Moreover, its overall structure is simple and reasonable, and it has great potential for widespread application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the adhesive layer at the water-side flow channel of the present invention; Figure 3 This is a schematic diagram of the structure of the adhesive layer at the air-side flow channel of the present invention. Detailed Implementation

[0017] The present invention will now be described in detail so that its advantages and features can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0018] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0019] like Figure 1-3As shown, this invention discloses a deep deoxygenation membrane assembly for demineralized water in a gas-fired steam combined cycle generator set, comprising a membrane end sealing plate 1, a membrane support frame 2, a flat diaphragm 3, a water-side flow channel adhesive layer 4, a gas-side flow channel adhesive layer 5, and a flat diaphragm sealing adhesive layer 6. The flat diaphragm 3 consists of several pieces, supported and fixed by the membrane support frame 2. The flat diaphragm 3 has several membrane holes. The flat diaphragm 3 uses its surface tension to prevent liquid water from passing through the membrane holes while allowing oxygen to pass through. One side of the flat diaphragm 3 is the water-side flow channel adhesive layer 4, which has multiple water-side flow channels 41 for liquid water to flow through. The other side of the flat diaphragm 3 is the gas-side flow channel adhesive layer 5, which has multiple gas-side flow channels 51 for oxygen to pass through. The end face of the flat diaphragm 3 is sealed by the flat diaphragm sealing adhesive layer 6, and the entire assembly is sealed at both ends by the membrane end sealing plate 1. This component can withstand influent temperatures of 160℃ and above, and influent pressures of up to 2 MPa, making it suitable for deep deoxygenation processes in desalinated water with dissolved oxygen content below 100 ppb.

[0020] In some embodiments, the diaphragm support frame 2 is a cubic grid structure, the diaphragm support frame 2 is made of titanium, the thickness of the diaphragm support frame 2 is 5-12mm, preferably 8mm, the flat diaphragms 3 are supported by the diaphragm support frame 2, and each flat diaphragm 3 is fixed by the compression of its two adjacent diaphragm support frames 2.

[0021] In some embodiments, the flat sheet membrane 3 is made of hydrophobic PTFE material, which has good hydrophobicity, stable chemical properties, and can withstand water temperatures of 160°C and above. The thickness of the flat sheet membrane 3 is 0.1-0.5 mm, preferably 0.2 mm. The flat sheet membrane 3 is covered with membrane pores with a diameter of 20-50 nm, and the porosity reaches 80% and above. Due to the surface tension on the surface of the flat sheet membrane 3, liquid water such as demineralized water cannot pass through the membrane pores, while oxygen is not affected by surface tension and can pass through the membrane pores.

[0022] In some embodiments, the water-side flow channel adhesive layer 4 is made of epoxy resin, which has a temperature resistance of about 180°C. The water-side flow channel adhesive layer 4 is disposed between two flat diaphragms 3 to serve as a seal.

[0023] In some embodiments, the water-side flow channel adhesive layer 4 has multiple water-side flow channels 41 arranged in a double layer, with an opening diameter of 1-5 mm, preferably 3 mm.

[0024] In some embodiments, the gas-side flow channel adhesive layer 5 is made of epoxy resin, which has a temperature resistance of about 180°C. The gas-side flow channel adhesive layer 5 is disposed between two flat diaphragms 3 to serve as a seal.

[0025] In some embodiments, the gas-side flow channel adhesive layer 5 has a plurality of gas-side flow channels 51 arranged in a single layer, with an opening diameter of 4-8 mm, preferably 6 mm.

[0026] Example 1 like Figure 1-3 As shown, a deep deoxygenation membrane assembly for demineralized water in a gas-fired steam combined cycle generator set includes a membrane end sealing plate 1, a membrane support frame 2, a flat diaphragm 3, a water-side flow channel adhesive layer 4, a gas-side flow channel adhesive layer 5, and a flat diaphragm sealing adhesive layer 6. The flat diaphragm 3 comprises several pieces, supported and fixed by the membrane support frame 2. The flat diaphragm 3 has several membrane pores. The flat diaphragm 3 uses its surface tension to prevent liquid water from passing through the membrane pores while allowing oxygen to permeate. One side has a water-side flow channel adhesive layer 4, with multiple water-side flow channels 41 arranged in a double layer, each with an opening diameter of 3mm, for liquid water to flow through. The other side of the flat diaphragm 3 has an air-side flow channel adhesive layer 5, with multiple air-side flow channels 51 arranged in a single layer, each with an opening diameter of 6mm, for oxygen to pass through. The end face of the flat diaphragm 3 is sealed by a flat diaphragm sealing diaphragm 6, and the entire module is sealed at both ends by a membrane end sealing plate 1. This module can withstand inlet water temperatures of 160℃ and above, and inlet water pressures of up to 2MPa, making it suitable for deep deoxygenation processes in desalination water with dissolved oxygen content below 100ppb.

[0027] In this embodiment, the diaphragm support frame 2 is a cubic grid structure, the material of the diaphragm support frame 2 is titanium, the thickness of the diaphragm support frame 2 is 8mm, the flat diaphragms 3 are supported by the diaphragm support frame 2, and each flat diaphragm 3 is fixed by the compression of its two adjacent diaphragm support frames 2.

[0028] The flat sheet membrane 3 is made of hydrophobic PTFE material, which has good hydrophobicity and stable chemical properties. It can withstand water temperatures of 160℃ and above. The thickness of the flat sheet membrane 3 is 0.2mm. The flat sheet membrane 3 is covered with membrane pores with a diameter of 30nm, and the porosity reaches 90%. Due to the surface tension on the surface of the flat sheet membrane 3, liquid water such as demineralized water cannot pass through the membrane pores, while oxygen is not affected by surface tension and can pass through the membrane pores.

[0029] The adhesive layer 4 at the water-side flow channel opening is made of epoxy resin, which has a temperature resistance of about 180°C. The adhesive layer 4 at the water-side flow channel opening is placed between the two flat diaphragms 3 to serve as a seal.

[0030] The adhesive layer 5 at the air-side flow channel is made of epoxy resin, which has a temperature resistance of about 180°C. The adhesive layer 5 at the air-side flow channel is placed between the two flat diaphragms 3 to provide a sealing function.

[0031] Any parts or structures not specifically described in this invention can be made using existing technologies or products, and will not be elaborated upon here.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A deep deoxygenation membrane assembly for demineralized water in a gas-fired steam combined cycle generator set, characterized in that, It includes a membrane support frame and several flat membranes. The membrane support frame supports and fixes the flat membranes. Several membrane pores are formed on the flat membranes. The flat membranes prevent liquid water from passing through the membrane pores by their surface tension, while allowing oxygen to pass through the membrane pores. One side of the flat membrane is a water-side flow channel adhesive layer, and the other side of the flat membrane is a gas-side flow channel adhesive layer.

2. The deep deoxygenation membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The diaphragm support frame has a cubic grid structure, and two adjacent diaphragm support frames work together to compress and fix a single flat diaphragm.

3. The deep deoxygenation membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The diaphragm support frame is made of titanium with a thickness of 5-12mm.

4. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The flat sheet membrane is made of hydrophobic PTFE material with a thickness of 0.1-0.5 mm.

5. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The pore size of the membrane is 20-50 nm.

6. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The end face of the flat diaphragm is sealed by a flat diaphragm sealing diaphragm.

7. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The adhesive layer of the water-side flow channel has multiple water-side flow channels for liquid water to flow through.

8. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 7, characterized in that, The water-side flow channel has multiple water-side flow channels arranged in a double layer on the adhesive layer, with an opening diameter of 1-5mm.

9. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 1, characterized in that, The gas-side flow channel adhesive layer has multiple gas-side flow channels for oxygen to pass through.

10. A deep deaeration membrane assembly for demineralized water in a gas-fired steam combined cycle generator set according to claim 9, characterized in that, The gas-side flow channel adhesive layer has multiple gas-side flow channels arranged in a single layer, with an opening diameter of 4-8 mm.

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