Dry absorption circulating water purification device used in sulfuric acid preparation process

Abstract

The utility model discloses a dry absorption circulating water purification device used in a sulfuric acid preparation process. The device comprises a shell, a hollow fiber microfiltration membrane assembly, a water inlet, a water outlet, a sewage discharge port, a supporting structure and a sealing device, a purification cavity is formed in the shell assembly; the hollow fiber micro-filtration membrane assembly is arranged in the purification cavity and comprises a plurality of hollow fiber micro-filtration membrane tubes; the supporting structure comprises a plurality of supporting frames and fixing supports, each supporting frame is provided with a multi-layer grid structure, the supporting frames are arranged at intervals in the longitudinal direction of the purification cavity, the supporting frames are connected through the fixing supports, and the upper ends and the lower ends of the supporting frames are fixed to the inner wall of the shell assembly; the water inlet is formed in one end of the shell assembly; the water outlet is formed in the other end of the shell assembly and connected to the water recycling pool. The sewage discharge port is located at the bottom of the shell assembly; and the sealing device is arranged at the interface of the shell assembly. The circulating water purifying device obviously improves the purifying efficiency of circulating water.

Description

Technical Field

[0001] This patent relates to a dry absorption circulating water purification device used in the sulfuric acid preparation process. Background Art

[0002] In industrial processes such as sulfuric acid production and stone cutting, circulating water often contains large amounts of particulate matter and suspended solids. If these impurities are not filtered and removed in a timely manner, they can corrode and clog production equipment, affecting the stable operation of the system. Existing circulating water purification technologies typically include traditional sedimentation tanks, sand filters, and ordinary filter screens. However, these methods have several shortcomings in practical applications:

[0003] 1. Low filtration efficiency:

[0004] Traditional filtration equipment, such as sedimentation tanks and sand filters, relies on gravity and simple physical barriers, making it difficult to effectively remove tiny particles and suspended solids from water. Consequently, the quality of purified water fails to meet high-standard industrial requirements. This is especially true when treating wastewater with high concentrations of solid particles, where filtration effectiveness is even more limited.

[0005] 2. Poor sealing performance and potential safety hazards:

[0006] Existing equipment often uses simple sealing systems, using single-layer seals or inexpensive sealing materials. These systems are prone to leakage in high-pressure, high-temperature environments. Liquid leakage not only wastes resources but can also cause equipment damage and even safety incidents.

[0007] 3. Poor corrosion resistance of equipment:

[0008] Many existing filtration equipment is made of ordinary metal or low-quality plastic materials, which are easily corroded by sulfuric acid and other corrosive media, leading to equipment damage and performance degradation. Frequent equipment maintenance and replacement in highly corrosive environments not only increases operating costs but also affects production continuity and stability.

[0009] To sum up, the technical background section of this patent is intended to explain the current status of the existing technical field. The content of this section will provide the necessary background information for understanding the technical contributions and innovations of this patent. The signals disclosed in this background technology section are only intended to increase the understanding of the overall background of this patent and should not be regarded as implying any form of subjective consciousness. Utility Model Content

[0010] In view of the above, the purpose of this patent is to provide a dry absorption circulating water purification device for use in the sulfuric acid preparation process to solve the technical problems of external discharge and subsequent maintenance.

[0011] In order to achieve the purpose of this patent, the technical solution adopted is a dry absorption circulating water purification device for use in the sulfuric acid preparation process, the device comprising: a shell, a hollow fiber microfiltration membrane assembly, a water inlet, a water outlet, a sewage discharge port, a support structure, and a sealing device; the shell assembly is made of chlorinated polyvinyl chloride material, and a purification cavity is formed inside the shell assembly; the hollow fiber microfiltration membrane assembly is arranged in the purification cavity, and the microfiltration membrane assembly includes a plurality of hollow fiber microfiltration membrane tubes, which are made of polytetrafluoroethylene material, and the pore size range of the microfiltration membrane tube is 0.1 to 0.5 microns, which are used to filter out particles and suspended matter in the circulating water; the support structure comprises a plurality of support frames and fixed brackets, and the support frame is made of corrosion-resistant material and has a multi-layer grid structure. The support frame is arranged along the purification cavity. The support frames are arranged at longitudinal intervals, and each support frame is connected by a fixed bracket, so that the hollow fiber microfiltration membrane components can be evenly distributed between the support frames. The upper and lower ends of the support frame are fixed to the inner wall of the shell component to ensure its stability in the purification cavity and prevent displacement and deformation under high temperature and high pressure conditions; the water inlet is arranged at one end of the shell component, which is used to introduce the dry absorption circulating water generated in the sulfuric acid preparation process into the purification cavity; the water outlet is arranged at the other end of the shell component, and the water outlet is connected to the water recovery pool, which is used to discharge the circulating water purified by the hollow fiber microfiltration membrane component; the sewage discharge port is located at the bottom of the shell component, which is used to discharge impurities and particles gathered after filtration; the sealing device is installed at the interface of the shell component to enhance the sealing performance of the device.

[0012] Furthermore, the hollow fiber microfiltration membrane assembly is provided with a plurality of independent microfiltration units, and each microfiltration unit is composed of a number of hollow fiber microfiltration membrane tubes arranged side by side to increase the water flow area and the filtration efficiency.

[0013] Furthermore, a pre-treatment filter is provided at the water inlet for preliminarily removing larger particles of impurities.

[0014] Furthermore, the sealing device includes a main sealing ring, an auxiliary sealing ring and a clamping fixing ring; the main sealing ring is made of polytetrafluoroethylene (PTFE) material, and the main sealing ring is installed at the joint surface of the water inlet, water outlet and sewage discharge outlet, and is used for liquid sealing between the inlet and outlet water pipes and the shell assembly; the auxiliary sealing ring is made of fluororubber material, and is arranged on the outside of the main sealing ring to form a double sealing structure with the main sealing ring; the clamping fixing ring is made of CPVC material, and the main sealing ring and the auxiliary sealing ring are pressed tightly against the interface surface by bolt fixing, and the inner side of the clamping fixing ring is provided with anti-slip ridges to enhance the impact resistance and durability of the sealing assembly.

[0015] Beneficial effects of this patent:

[0016] Efficient filtration performance:

[0017] This device utilizes hollow fiber microfiltration membrane modules with pore sizes ranging from 0.1 to 0.5 microns. These membrane modules effectively remove particulates and suspended solids from circulating water, significantly improving the cleanliness of the purified water. Compared to conventional filtration equipment, this patented device improves filtration efficiency and water flow capacity by optimizing the membrane tube materials and design arrangement.

[0018] Compact and easy to maintain:

[0019] The patented support structure utilizes a multi-layered grid design. The integration of the support frame and microfiltration membrane components reduces space usage and makes the overall device more compact. Furthermore, the modular design of the device facilitates assembly and disassembly of components, making maintenance and replacement easier, reducing maintenance costs and downtime.

[0020] Double sealing structure improves safety:

[0021] The device's sealing system utilizes a dual-seal design, consisting of a primary and secondary seal ring. This effectively enhances the device's sealing performance and prevents leakage of high-pressure fluids. Furthermore, the anti-slip design of the compression retaining ring enhances the seal's impact resistance and durability, improving operational safety under high-pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of this patent or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of this patent. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the structure of this patent;

[0024] Figure 2 This is a side view of the purification chamber of this patent;

[0025] In the figure, 101-housing assembly, 102-purification chamber, 103-hollow fiber microfiltration membrane assembly, 104-water inlet, 105-water outlet, 106-sewage outlet, 2-support structure. DETAILED DESCRIPTION

[0026] The following is an explanation of this patent in this embodiment based on the drawings and some implementation methods.

[0027] It should be noted that, unless there is a conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present patent will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] like Figure 1-2 The figure shows a device for purifying circulating water during the sulfuric acid production process using dry suction. Designed to improve circulating water purification efficiency, reduce the impact of impurities on production equipment, and extend equipment life, the device includes a housing assembly, a hollow fiber microfiltration membrane assembly, a water inlet, a water outlet, a wastewater outlet, a support structure, and a sealing device.

[0029] In this embodiment, the shell component is made of chlorinated polyvinyl chloride (CPVC) material, which has good corrosion resistance and can withstand the high temperature and high pressure environment that may occur during the preparation of sulfuric acid. A cavity for purification is formed inside the shell. The design of the purification cavity takes into account the optimal path of liquid flow to ensure maximum filtration efficiency.

[0030] In this embodiment, the hollow fiber microfiltration membrane assembly is arranged in the purification chamber and is composed of multiple hollow fiber microfiltration membrane tubes. Each microfiltration membrane tube is made of polytetrafluoroethylene (PTFE) material, which has excellent chemical stability and mechanical strength. The pore size range of the microfiltration membrane tube is 0.1 to 0.5 microns, which can effectively filter out particles and suspended matter in the circulating water. The design of the hollow fiber microfiltration membrane assembly ensures the uniform distribution of water flow and stable filtration effect.

[0031] In this embodiment, the support structure includes multiple support frames and fixed brackets made of corrosion-resistant materials. The support frames are multi-layer grid structures and are arranged at intervals along the longitudinal direction of the purification chamber. Each support frame is connected by a fixed bracket to ensure that the hollow fiber microfiltration membrane assembly is evenly distributed between the support frames. The upper and lower ends of the support frame are fixed to the inner wall of the outer shell assembly, thereby ensuring the stability of the device under high temperature and high pressure conditions and preventing displacement and deformation.

[0032] In this embodiment, the water inlet is provided at one end of the housing assembly and is connected to a water supply pipeline for the dry suction circulating water generated during the sulfuric acid preparation process.

[0033] In this embodiment, the water outlet is provided at the other end of the housing assembly and is connected to the water recovery tank for discharging the circulating water purified by the hollow fiber microfiltration membrane assembly.

[0034] In this embodiment, the sewage discharge port is located at the bottom of the housing assembly and is used to discharge impurities and particles accumulated after filtration. The sewage discharge port is equipped with an adjustable valve to control the discharge frequency and flow rate to prevent the accumulation of impurities from affecting the performance of the device.

[0035] In this embodiment, the sealing device is installed at the interface of the housing assembly, and includes a main sealing ring, an auxiliary sealing ring and a clamping fixing ring. The main sealing ring is made of polytetrafluoroethylene (PTFE) material and is installed at the joint surface of the water inlet, water outlet and sewage outlet to provide liquid sealing performance. The auxiliary sealing ring is made of fluororubber material and is arranged on the outside of the main sealing ring to form a double sealing structure with the main sealing ring to further enhance the sealing performance of the device. The clamping fixing ring is made of CPVC material, and the main sealing ring and the auxiliary sealing ring are pressed tightly against the interface surface by bolts. The inner side of the clamping fixing ring is provided with anti-slip ridges to enhance the impact resistance and durability of the sealing assembly.

[0036] In this embodiment, multiple independent microfiltration units are arranged in the hollow fiber microfiltration membrane assembly. Each microfiltration unit is composed of several hollow fiber microfiltration membrane tubes arranged side by side to increase the area through which water flows and the filtration efficiency. This design can significantly improve the efficiency of the device in treating large-flow wastewater, and is particularly suitable for stone cutting wastewater containing a large amount of solid particles.

[0037] In this embodiment, a pretreatment filter is added at the water inlet to preliminarily remove larger particles of impurities in the wastewater. The pretreatment filter is made of stainless steel wire mesh, which has high strength and corrosion resistance. The mesh size of the pretreatment filter is selected according to the specific application requirements. It can reduce the load on the microfiltration membrane while preventing larger particles from damaging the microfiltration membrane assembly.

[0038] In this embodiment, the sealing device includes a main sealing ring, an auxiliary sealing ring and a clamping fixing ring. The main sealing ring is made of polytetrafluoroethylene (PTFE) material and has excellent corrosion resistance and high temperature resistance. It is installed at the joint surface of the water inlet, water outlet and sewage outlet to ensure reliable liquid sealing between the inlet and outlet water pipes and the shell assembly. The auxiliary sealing ring is made of fluororubber material and has better elasticity and sealing performance. It is arranged on the outside of the main sealing ring and forms a double sealing structure with the main sealing ring. The clamping fixing ring is made of CPVC material and is fixed with bolts to press the main sealing ring and the auxiliary sealing ring against the interface surface to enhance the impact resistance and durability of the sealing assembly. The inner side of the clamping fixing ring is provided with anti-slip ridges to prevent the fixing ring from loosening under high-pressure impact.

[0039] In this example, the installation steps of the sealing assembly include: first, placing the main sealing ring on the joint surfaces of the water inlet, water outlet and sewage outlet to ensure that the sealing ring fits well with the joint surface; then, installing the auxiliary sealing ring on the outside of the main sealing ring to ensure the tightness of the double-layer seal; finally, tightening and fixing the sealing ring by tightening the fixing ring and bolts. After the installation is completed, a sealing performance test should be carried out to ensure that the device is leak-free within the rated pressure and temperature range.

[0040] In this embodiment, the support structure is installed as follows: the support frame is made of corrosion-resistant materials, usually stainless steel or other high-strength alloys, to ensure durability in high temperature, high pressure and corrosive environments. The support frame is designed as a multi-layer grid structure. A plurality of fixed card slots for positioning the support frame are pre-provided on the inner wall of the shell assembly. These card slots are evenly distributed along the longitudinal intervals of the purification chamber. The support frames are placed one by one in these card slots and installed layer by layer from the bottom up. The upper and lower ends of each support frame are fixed to the inner wall of the shell through the card slots to ensure that it will not be displaced or deformed in a high temperature and high pressure environment. The fixed bracket is also made of corrosion-resistant materials, such as stainless steel or CPVC, to ensure that it is not easily damaged in harsh environments. Bracket connection method: Each support frame is connected by a fixed bracket. One end of the fixed bracket is welded or bolted to the lower support frame, and the other end is connected to the upper support frame. This connection method not only increases the overall stability, but also makes the spacing between each support frame uniform, thereby optimizing the distribution of the hollow fiber microfiltration membrane assembly.

[0041] In this embodiment, a dedicated installation space is reserved for the hollow fiber microfiltration membrane assembly in the grid structure of the support frame, and the microfiltration membrane assemblies are inserted one by one into the grid of the support frame. In order to ensure that the liquid can flow evenly through each microfiltration membrane tube, the arrangement of the components should maintain good neatness and consistency.

[0042] The purification process is described in detail as follows:

[0043] Water inlet process:

[0044] The dry suction circulating water enters the water inlet of the device through the water inlet pipe. The pre-treatment filter at the water inlet first performs preliminary filtration on the circulating water to remove larger particles to prevent these large particles from damaging the microfiltration membrane components.

[0045] Filtering process:

[0046] Water entering the purification chamber first encounters a hollow fiber microfiltration membrane module. This module is composed of multiple microfiltration units, each comprised of several parallel hollow fiber microfiltration membrane tubes with pore sizes ranging from 0.1 to 0.5 microns. As water passes through the membrane tubes, particles and suspended solids are trapped on their surfaces, allowing the purified water to pass through and enter the next stage.

[0047] Support and distribution:

[0048] The support structure includes multiple support frames and fixed brackets arranged at intervals along the longitudinal direction of the purification chamber. The design of the support frame allows the hollow fiber microfiltration membrane assembly to be evenly distributed in the purification chamber. The support structure not only provides mechanical support for the microfiltration membrane assembly, but also helps maintain the stability of the membrane assembly in a high temperature and high pressure environment, preventing displacement or deformation of the membrane assembly due to water flow impact and high pressure.

[0049] Water and sewage discharge:

[0050] Water filtered through the microfiltration membrane assembly flows out of the device through the outlet and into the water recovery tank. The recovered water can be recycled into the sulfuric acid production process. Meanwhile, impurities and particles trapped during the filtration process gradually accumulate at the bottom of the purification chamber and are discharged through the wastewater outlet located at the bottom of the housing assembly. These impurities and particles are discharged through regular sewage treatment operations.

[0051] Sealing guarantee:

[0052] To prevent liquid leakage under high pressure and high temperature, the device utilizes a multi-seal structure. The primary and secondary seals are made of polytetrafluoroethylene (PTFE) and fluororubber, respectively, forming a double seal. These seals are secured to the device interface via a compression retaining ring. This seal assembly design significantly enhances the device's liquid-tight seal, ensuring stability and safety in high-pressure operating environments.

[0053] The above is an example of a specific embodiment of this patent and is for reference only and is not intended to limit the scope of this patent. Without departing from the spirit and scope of this patent, those skilled in the art may make various changes and modifications to this patent, and such changes and modifications shall be included in the scope of protection of this patent.

[0054] The specific embodiments of this patent are provided for illustrative purposes only and do not limit the scope of protection of this patent. Various changes and modifications may be made to the specific embodiments of this patent without departing from the gist and spirit of this patent. Such changes and modifications are within the scope of this patent.

[0055] It is worth noting that: in the description of this patent, the meaning of "multiple" is two or more, unless otherwise clearly defined. In this patent, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; the circuits described in this patent are all commonly used circuits in the field, and other related components are all existing commonly used components. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to the specific circumstances.

[0056] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that this patent can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of this patent is defined by the appended claims, not the foregoing description, and is intended to encompass all variations that fall within the meaning and scope of the elements of the claims. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A dry suction circulating water purification device for use in a sulfuric acid preparation process, characterized in that: The device comprises: a shell component, a hollow fiber microfiltration membrane component, a water inlet, a water outlet, a sewage outlet, a support structure, and a sealing device; the shell component is made of chlorinated polyvinyl chloride material, and a purification cavity is formed inside the shell component; The hollow fiber microfiltration membrane assembly is arranged in the purification chamber. The microfiltration membrane assembly includes a plurality of hollow fiber microfiltration membrane tubes. The microfiltration membrane tubes are made of polytetrafluoroethylene material. The pore size of the microfiltration membrane tubes ranges from 0.1 to 0.5 microns and is used to filter out particles and suspended matter in the circulating water. The support structure includes multiple support frames and fixed brackets. The support frames are made of corrosion-resistant materials and have a multi-layer grid structure. The support frames are arranged at intervals along the longitudinal direction of the purification chamber. Each support frame is connected by a fixed bracket so that the hollow fiber microfiltration membrane components can be evenly distributed between the support frames. The upper and lower ends of the support frame are fixed to the inner wall of the housing component to ensure its stability in the purification chamber and prevent displacement and deformation under high temperature and high pressure conditions. The water inlet is provided at one end of the housing assembly and is used to introduce the dry suction circulating water generated during the sulfuric acid preparation process into the purification chamber; The water outlet is provided at the other end of the housing assembly, and the water outlet is connected to the water recovery tank for discharging the circulating water purified by the hollow fiber microfiltration membrane assembly; The sewage discharge port is located at the bottom of the housing assembly and is used to discharge impurities and particles that have accumulated after filtration; The sealing device is installed at the interface of the housing component to enhance the sealing performance of the device.

2. A dry suction circulating water purification device for use in a sulfuric acid preparation process according to claim 1, characterized in that: The hollow fiber microfiltration membrane assembly is equipped with multiple independent microfiltration units. Each microfiltration unit is composed of several hollow fiber microfiltration membrane tubes arranged side by side to increase the water flow area and filtration efficiency.

3. A dry suction circulating water purification device for use in a sulfuric acid preparation process according to claim 1, characterized in that: A pre-treatment filter is provided at the water inlet to initially remove larger particles of impurities.

4. A dry suction circulating water purification device for use in a sulfuric acid preparation process according to claim 1, characterized in that: The sealing device includes a main sealing ring, an auxiliary sealing ring and a clamping fixing ring; the main sealing ring is made of polytetrafluoroethylene (PTFE) material, and is installed at the joint surface of the water inlet, water outlet and sewage outlet, and is used for liquid sealing between the inlet and outlet pipes and the shell assembly; the auxiliary sealing ring is made of fluororubber material, and is arranged on the outside of the main sealing ring to form a double sealing structure with the main sealing ring; the clamping fixing ring is made of CPVC material, and the main sealing ring and the auxiliary sealing ring are pressed tightly against the interface surface by bolts. The inner side of the clamping fixing ring is provided with anti-slip ridges to enhance the impact resistance and durability of the sealing assembly.

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