Gas-liquid separation structure for carbon, nitrogen and phosphorus recovery from municipal wastewater

Abstract

The utility model relates to gas -liquid separation technical field, and disclose a kind of gas-liquid separation structure for urban sewage carbon nitrogen phosphorus recovery, including first installation sleeve, the second installation sleeve being fixedly connected in first installation sleeve top and the top cover being fixedly connected in second installation sleeve top.The gas-liquid separation structure for urban sewage carbon nitrogen phosphorus recovery, by the setting of optimization component, these micron and submicron level fine droplet and particulate matter can be efficiently intercepted, the high-efficiency filter layer uses nanometer fiber filter material with higher specific surface area extremely small fiber diameter, form more fine reticular structure, can capture nanometer scale aerosol particle and superfine mist drop, enhance the effect of gas-liquid separation, superhydrophobic layer prevents moisture accumulation, reduce moisture penetration, avoid the problem that the droplet or bubble trapping capacity of micron and submicron level is limited, leading to a lot of mist droplet is often entrained in the gas after separation, help to improve the high efficiency of gas-liquid separation.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid separation technology, and in particular to a gas-liquid separation structure for recovering carbon, nitrogen and phosphorus from urban sewage. Background Technology

[0002] With the acceleration of urbanization and increasingly stringent environmental protection requirements, urban sewage treatment has gradually shifted from the traditional goal of "pollution removal" to a new paradigm of "resource recovery, energy conversion, and low carbonization." Sewage is rich in organic matter, nitrogen, and phosphorus, among other resources. Carbon can be converted into biogas through processes such as anaerobic digestion, achieving energy recovery. Nitrogen and phosphorus are valuable nutrients that can be recycled and prepared into agricultural fertilizers (such as struvite and magnesium ammonium phosphate). In the core process chain of resource recovery, the anaerobic digestion unit inevitably produces a gas-liquid two-phase mixture, thus requiring the use of gas-liquid separation structures.

[0003] In practical applications, existing gas-liquid separation structures mainly rely on gravity sedimentation or simple centrifugal separation, which has limited ability to capture micron-sized and submicron-sized droplets or bubbles. This results in the separated gas often carrying a large number of mist-like droplets, which is not conducive to improving the efficiency of gas-liquid separation. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a gas-liquid separation structure for recovering carbon, nitrogen, and phosphorus from urban sewage, thereby solving the problem mentioned in the background art of not being able to improve the gas-liquid separation efficiency.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban sewage, comprising a first mounting sleeve, a second mounting sleeve fixedly connected above the first mounting sleeve, and a top cover fixedly connected above the second mounting sleeve. A uniform plate is fixedly connected to the interior of the bottom surface of the first mounting sleeve, a demisting assembly is fixedly connected to the interior of the first mounting sleeve, and a wire mesh demister is fixedly connected to the interior of the second mounting sleeve. An optimization component is fixedly connected to the top surface of the wire mesh demister.

[0008] The demisting assembly includes a mounting bracket fixedly connected inside the first mounting sleeve, and a plurality of baffles are welded to the lower part of the mounting bracket.

[0009] The optimized component includes a superhydrophobic layer fixedly connected to the top surface of the wire mesh demister. The superhydrophobic layer contains a deep interception layer and a high-efficiency filter layer, with the high-efficiency filter layer located above the deep interception layer.

[0010] As a further embodiment of this invention, an activated carbon adsorption pad is disposed above the superhydrophobic layer, and the activated carbon adsorption pad has a honeycomb structure.

[0011] As a further embodiment of this utility model, the surface of the uniform plate is provided with a plurality of through holes, and the uniform plate is made of 316L stainless steel.

[0012] As a further embodiment of this utility model, the wire mesh demister is composed of multiple layers of woven wire mesh, and the wire mesh material in the wire mesh demister is stainless steel.

[0013] As a further embodiment of this invention, the top cover is fixedly connected to a biogas outlet pipe for connecting to a methane purification device.

[0014] As a further embodiment of this invention, the deep interception layer is made of polyamide filter material.

[0015] As a further embodiment of this invention, the high-efficiency filter layer is made of nanofiber filter material.

[0016] As a further embodiment of this utility model, a connecting flange is welded to the outer wall of the bottom surface of the first mounting sleeve, and the surface of the connecting flange is provided with mounting holes for fixing.

[0017] (III) Beneficial Effects

[0018] This utility model provides a gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater, which has the following beneficial effects:

[0019] 1. This gas-liquid separation structure for urban wastewater carbon, nitrogen, and phosphorus recovery optimizes component settings. During operation, water mist separated by baffles enters a wire mesh demister for further separation. The deep interception layer uses a polyamide filter element, which has denser pores and can efficiently intercept micron- and submicron-sized droplets and particles. The high-efficiency filtration layer uses nanofiber filter material, which has a high specific surface area and extremely small fiber diameter, forming a finer mesh structure that can capture nanoscale aerosol particles and ultrafine droplets, enhancing the gas-liquid separation effect. The superhydrophobic layer prevents water accumulation and reduces water penetration, avoiding the problem of a large number of mist droplets often being carried in the separated gas due to limited capture capacity for micron- and submicron-sized droplets or bubbles, thus helping to improve the efficiency of gas-liquid separation.

[0020] 2. This gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater utilizes a uniform plate and a demisting component. The first mounting sleeve is installed above the upflow anaerobic sludge bed reactor, forcing the gas flow through each hole of the uniform plate to pass evenly. This blocks large droplets and fine sludge particles carried by the effluent from the reactor. The gas containing droplets can quickly change direction as the baffle plate bends, allowing the gas to rapidly follow the channel's direction of change. The droplets, however, cannot quickly change direction and continue moving in their original direction, eventually colliding with the baffle plate wall and separating. This reduces the risk of baffle plate blockage, prevents sludge adhesion from narrowing the channel and increasing airflow resistance, and helps extend the service life of the demisting component, reducing maintenance costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the defogging component of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the defogging component of this utility model.

[0025] In the diagram: 1. First mounting sleeve; 2. Second mounting sleeve; 3. Top cover; 4. Uniform plate; 5. Demisting assembly; 501. Mounting bracket; 502. Baffle plate; 6. Wire mesh demister; 7. Optimization assembly; 701. Superhydrophobic layer; 702. Deep interception layer; 703. High-efficiency filter layer; 8. Activated carbon adsorption pad; 9. Through hole; 10. Biogas outlet pipe; 11. Connecting flange; 12. Mounting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figures 1 to 4This utility model provides a technical solution: a gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban sewage, comprising a first mounting sleeve 1, a second mounting sleeve 2 fixedly connected above the first mounting sleeve 1, and a top cover 3 fixedly connected above the second mounting sleeve 2. A uniform plate 4 is fixedly connected inside the bottom surface of the first mounting sleeve 1, a demister assembly 5 is fixedly connected inside the first mounting sleeve 1, a wire mesh demister 6 is fixedly connected inside the second mounting sleeve 2, and an optimization assembly 7 is fixedly connected to the top surface of the wire mesh demister 6.

[0028] The demisting component 5 includes a mounting frame 501 fixedly connected inside the first mounting sleeve 1. Several baffles 502 are welded to the bottom of the mounting frame 501. Through the arrangement of the uniform plate 4 and the demisting component 5, the first mounting sleeve 1 is installed above the upflow anaerobic sludge bed reactor, forcing the gas flow after the reaction to pass evenly through each through hole 9 of the uniform plate 4. This blocks large droplets and fine sludge particles carried in the gas flow carried by the effluent in the reactor. The gas containing droplets can quickly change its airflow direction as it bends in the baffles 502. The gas can quickly follow the channel to change direction, while the droplets have difficulty changing their direction of movement quickly and will continue to move in the original direction, eventually colliding with the wall of the baffles 502 and separating them. This reduces the risk of blockage of the baffles 502, avoids narrowing of the channel and increased airflow resistance due to sludge adhesion, helps to increase the service life of the demisting component 5, and reduces maintenance costs.

[0029] The optimized component 7 includes a superhydrophobic layer 701 fixedly connected to the top surface of the wire mesh demister 6. The superhydrophobic layer 701 encapsulates a depth interception layer 702 and a high-efficiency filter layer 703. The high-efficiency filter layer 703 is located above the depth interception layer 702. Through the configuration of the optimized component 7, during use, water mist separated by the baffle 502 enters the wire mesh demister 6 for further separation. The depth interception layer 702 is made of polyamide filter material, which has denser pores and can efficiently intercept micron- and submicron-sized particles. For fine droplets and particulate matter, the high-efficiency filter layer 703 uses nanofiber filter material, which has a high specific surface area and extremely small fiber diameter, and can form a finer mesh structure. It can capture nanoscale aerosol particles and ultrafine mist droplets, increasing the gas-liquid separation effect. The superhydrophobic layer 701 prevents water accumulation and reduces water penetration, avoiding the problem that the separated gas often carries a large number of mist droplets due to the limited ability to capture micron- and submicron-sized droplets or bubbles. This helps to improve the efficiency of gas-liquid separation.

[0030] An activated carbon adsorption pad 8 is placed above the superhydrophobic layer 701. The activated carbon adsorption pad 8 has a honeycomb structure and plays a role in adsorbing volatile organic compounds in sewage.

[0031] The surface of the uniform plate 4 is provided with several through holes 9. The uniform plate 4 is made of 316L stainless steel. The through holes 9 are designed to ensure uniform flow.

[0032] The wire mesh demister 6 is made of multiple layers of woven wire mesh. The wire mesh material in the wire mesh demister 6 is stainless steel. Through the setting of the wire mesh demister 6, the gas-liquid separation function is achieved.

[0033] The top cover 3 is fixedly connected to a biogas outlet pipe 10, which is used to connect to a methane purification device. The biogas outlet pipe 10 serves to transport the separated biogas to subsequent processes.

[0034] The deep interception layer 702 is made of polyamide filter material. Through the design of the deep interception layer 702, it can effectively intercept micron-sized and submicron-sized fine droplets and particles.

[0035] The high-efficiency filter layer 703 is made of nanofiber filter material. Through the setting of the high-efficiency filter layer 703, it can capture nanoscale aerosol particles and ultrafine droplets, and increase the gas-liquid separation effect.

[0036] A connecting flange 11 is welded to the outer wall of the bottom surface of the first mounting sleeve 1. The surface of the connecting flange 11 is provided with mounting holes 12 for fixing. The mounting holes 12 serve to connect the first mounting sleeve 1 to the external upflow anaerobic sludge bed reactor using external fasteners.

[0037] In this invention, the working steps of the device are as follows:

[0038] First step: Install the first installation sleeve 1 above the upflow anaerobic sludge bed reactor, so that the gas flow after the reaction is forced to pass evenly through each through hole 9 of the uniform plate 4, blocking the large droplets and fine sludge particles mixed in with the gas flow carried by the effluent in the reactor. This allows the gas containing droplets to quickly change the airflow direction in the bending of the baffle plate 502. The gas can quickly follow the channel to change direction, while the droplets have difficulty changing their direction of movement quickly and will continue to move in the original direction, eventually hitting the wall of the baffle plate 502 and separating them.

[0039] The second step: During use, the water mist separated by the baffle plate 502 enters the wire mesh demister 6 for further separation. The deep interception layer 702 uses a polyamide filter element, which has denser pores and can efficiently intercept these micron- and submicron-sized fine droplets and particles. The high-efficiency filtration layer 703 uses nanofiber filter material with a high specific surface area and a very small fiber diameter, which can form a finer mesh structure, capable of capturing nanoscale aerosol particles and ultrafine droplets, increasing the gas-liquid separation effect. The superhydrophobic layer 701 prevents water accumulation and reduces water penetration. It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the device's power mechanism, power supply system, and control system is not fully described. However, those skilled in the art, understanding the principle of the above utility model, can clearly understand the specifics of its power mechanism, power supply system, and control system. The control method in the application document is automatic control through a controller, and the controller's control circuit can be implemented by those skilled in the art through simple programming.

[0040] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid separation structure for recovering carbon, nitrogen, and phosphorus from urban sewage, comprising a first mounting sleeve (1), a second mounting sleeve (2) fixedly connected above the first mounting sleeve (1), and a top cover (3) fixedly connected above the second mounting sleeve (2), characterized in that: A uniform plate (4) is fixedly connected inside the bottom surface of the first mounting sleeve (1), a demisting component (5) is fixedly connected inside the first mounting sleeve (1), a wire mesh demister (6) is fixedly connected inside the second mounting sleeve (2), and an optimization component (7) is fixedly connected to the top surface of the wire mesh demister (6). The defogging assembly (5) includes a mounting bracket (501) fixedly connected inside the first mounting sleeve (1), and a plurality of baffles (502) are welded to the bottom of the mounting bracket (501). The optimized component (7) includes a superhydrophobic layer (701) fixedly connected to the top surface of the wire mesh demister (6). The superhydrophobic layer (701) contains a deep interception layer (702) and a high-efficiency filter layer (703), with the high-efficiency filter layer (703) located above the deep interception layer (702).

2. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: An activated carbon adsorption pad (8) is disposed above the superhydrophobic layer (701), and the activated carbon adsorption pad (8) has a honeycomb structure.

3. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: The surface of the uniform plate (4) is provided with a number of through holes (9), and the uniform plate (4) is made of 316L stainless steel.

4. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: The wire mesh demister (6) is made of multiple layers of woven wire mesh, and the wire mesh material in the wire mesh demister (6) is stainless steel.

5. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: The top cover (3) is fixedly connected to a biogas outlet pipe (10) for connecting to a methane purification device.

6. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: The deep interception layer (702) is made of polyamide filter material.

7. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: The high-efficiency filter layer (703) is made of nanofiber filter material.

8. The gas-liquid separation structure for carbon, nitrogen, and phosphorus recovery in urban wastewater according to claim 1, characterized in that: The outer wall of the bottom surface of the first mounting sleeve (1) is welded with a connecting flange (11), and the surface of the connecting flange (11) is provided with mounting holes (12) for fixing.

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