Modular splicing device for ion exchange softening of oily sewage

Abstract

This utility model discloses a modular splicing device for ion exchange softening of oily wastewater, belonging to the field of refining wastewater treatment technology. The device body comprises an inlet end connected to a raw water storage tank and an outlet end connected to an outlet collection tank. A pump is installed on the pipeline at the inlet end of the device body. The device body includes a lower end cap, an upper end cap, and at least one cylindrical body. The lower end cap and the cylindrical body, as well as the cylindrical body and the upper end cap, are connected externally via pipelines. It also includes several water valves, which are installed at the inlet and outlet of the lower end cap, the upper end cap, and the cylindrical body to cut off the connection with the pipelines. This utility model has the advantages of simple structure, high ion exchange efficiency, convenient resin regeneration operation, simultaneous ion exchange softening reaction and resin regeneration reaction within the same device, and low operating cost.

Description

Technical Field

[0001] This utility model relates to the field of refining wastewater treatment technology, and in particular to a modular splicing device for ion exchange softening of oily wastewater. Background Technology

[0002] The discharge of industrial wastewater in my country is increasing daily with the development of oil refining and chemical enterprises, seriously restricting the country's ecological development. Under increasingly stringent requirements for water conservation and emission reduction, scientific and reasonable wastewater treatment and reuse technologies are needed to meet the development requirements of the refining and chemical industry. Currently, refining and chemical enterprises generally recycle and reuse oily wastewater, purifying it through appropriate treatment technologies for use as makeup water for other units within the enterprise. This not only reduces the enterprise's demand for fresh water but also increases the wastewater reuse rate. However, the makeup water requirements for different units within refining and chemical enterprises vary. For example, Sinopec requires the hardness of the injection water for its hydrogenation unit to be less than or equal to 1 mg / L. Therefore, the primary condition for using water for hydrogenation units is to reduce the hardness to below 1 mg / L. Considering that water hardness is mainly caused by calcium and magnesium ions, and that ion exchange resins, depending on their functional groups, will only adsorb corresponding ions under specific conditions, the exchangeable cations (such as H+) in ion exchange resins can be utilized. + Na + ), to remove Ca from the water 2+ Mg 2+ Removes and reduces the hardness in wastewater.

[0003] Conventional ion exchange resins possess good mechanical properties, are insoluble in acids, alkalis, and other organic solvents, and can effectively separate various metal ions. However, their drawbacks include a lack of selectivity and poor resistance to oil contamination. Although many domestic scholars have conducted extensive research on using resins for softening and dehardening oily wastewater, and have optimized resins such as weak acid Na-type resins, these optimized resins, when loaded into conventional ion exchange devices, will become largely contaminated and clogged by oily substances after prolonged ion exchange, thus reducing their ion exchange performance. Furthermore, when regenerating and cleaning contaminated or saturated resins, the entire resin in the conventional device needs to be regenerated, interrupting the ion exchange softening reaction and significantly increasing economic and time costs. Therefore, improving conventional ion exchange devices can not only meet the requirements for ion exchange softening and dehardening but also reduce equipment investment, operating costs, and time costs.

[0004] In summary, the following technical problems exist when using existing conventional ion exchange resin devices to treat wastewater from refining and chemical enterprises:

[0005] 1. Conventional ion exchange resin devices have a simple structure and unidirectional water flow, requiring a large amount of ion exchange resin to meet the treatment requirements.

[0006] 2. Conventional ion exchange resin devices usually require additional oil removal equipment to solve the problem of clogging caused by oily substances in oily wastewater, which increases the investment cost of the equipment.

[0007] 3. In conventional ion exchange resin devices and their improved versions, when the ion exchange performance decreases and the hardening removal effect is poor and regeneration is required, the ion exchange softening reaction needs to be stopped and all the resin in the device needs to be regenerated, which greatly increases the economic and time costs.

[0008] 4. Conventional ion exchange resin devices and their improved versions require complete replacement of the resin after prolonged use and failure. This process involves long downtime and high economic costs.

[0009] Therefore, in view of the above problems, it is necessary for this utility model to provide a modular splicing device for ion exchange softening of oily wastewater with high ion exchange efficiency, easy resin regeneration and replacement after failure, and low economic operating cost. Utility Model Content

[0010] The purpose of this invention is to overcome the defects of the existing technology and provide a modular splicing device for ion exchange softening of oily wastewater. This device addresses the problems of low ion exchange efficiency, long regeneration time after resin adsorption saturation, and high overall replacement cost after resin failure when using existing ion exchange resin devices to treat wastewater from refining and chemical enterprises.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] This utility model discloses a modular splicing device for ion exchange softening of oily wastewater, comprising:

[0013] The main body of the device has an inlet end connected to the raw water storage tank and an outlet end connected to the outlet water collection tank. A pump is installed on the pipeline at the inlet end of the main body of the device.

[0014] The main body of the device includes a lower end cap assembly and an upper end cap assembly; and

[0015] At least one cylindrical assembly, wherein the lower end cap assembly is externally connected to the cylindrical assembly, and the cylindrical assembly is externally connected to the upper end cap assembly via pipelines; further comprising...

[0016] Several water valves are installed at the inlet and outlet of the lower end cap device, the upper end cap device, and the cylindrical device to cut off the connection with the pipeline.

[0017] Furthermore, the cylindrical device comprises two cylinders, which are connected externally by pipelines.

[0018] Furthermore, the cylindrical body device and the lower end cap device, as well as the cylindrical body device and the upper end cap device, can be detachably and securely connected.

[0019] Furthermore, the lower end cap device has two water inlets, each of which is equipped with a water valve.

[0020] Furthermore, the upper end cap device has two water outlets, each of which is equipped with a water valve.

[0021] Furthermore, baffles are provided inside the lower end cap device, the upper end cap device, and the cylindrical body device.

[0022] Furthermore, the pump is a peristaltic pump.

[0023] In the above technical solution, the modular splicing device for ion exchange softening of oily wastewater provided by this utility model has the following advantages compared with conventional ion exchange resin devices in the prior art for ion exchange softening and hardening reactions:

[0024] Because oily wastewater contaminates the resin, the ion exchange resin's exchange capacity gradually diminishes with prolonged operation, requiring regeneration. Experiments have shown that the oil-contaminated resin, as well as the resin that is first saturated, is mainly concentrated on the inlet side of the device. Therefore, by adopting a modular, spliced ​​cylindrical device, the resin filling unit can be divided into multiple independent modules without changing the overall footprint. In each module, the oily wastewater undergoes thorough ion exchange under the action of baffles, and the most heavily contaminated resin is separated from the resin in other modules, protecting most of the resin in the unit from further contamination. Moreover, once the resin in a module loses its ion exchange capacity, it can be regenerated separately without disassembling the module; simply changing the inlet and outlet pipelines reduces the amount of resin requiring regeneration, saves time, and is more economical.

[0025] The modular assembly device for ion exchange softening of oily wastewater achieves the above-mentioned enhanced effects primarily because: Each module—including the lower end cap, upper end cap, and cylindrical body—is independent. This ensures that the resin most heavily contaminated with oil is concentrated in one or more modules on the inlet side. Furthermore, each module is equipped with baffles, which increase residence time and enhance ion exchange efficiency, guaranteeing that the effluent meets requirements after the ion exchange reaction. Additionally, when the amount of oily pollutants in the wastewater suddenly increases, activated carbon can be added to the end caps and cylindrical bodies on the inlet side to adsorb the oil, further protecting the resin in other modules from contamination. Moreover, the external piping allows for resin regeneration even when the resin in a module is completely contaminated with oil or becomes saturated due to the hardening reaction. Instead of stopping the inlet or outlet, the inlet and outlet pipelines can be modified to prevent wastewater from flowing through that module, allowing the ion exchange reaction to continue while the resin regeneration process continues.

[0026] In summary, this modular splicing device for ion exchange softening of oily wastewater can not only reduce the hardness of oily wastewater to below 1 mg / L, but also avoid a large amount of ion exchange resin being contaminated by oily substances in the wastewater, thus preventing increased contamination of the ion exchange resin and economic costs. This modular splicing device features a simple structure, high ion exchange efficiency, convenient resin regeneration operation, and the ability to simultaneously carry out ion exchange softening and resin regeneration reactions within the same device, while maintaining low operating costs. It also enables long-term operation of the ion exchange resin softening and hardening reaction, demonstrating significant application potential. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0028] Figure 1 This is a schematic diagram of a modular splicing device for ion exchange softening of oily wastewater disclosed in this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 001. Raw water storage tank; 002. Pump; 003. Lower end cap assembly; 004. Cylinder assembly; 005. Cylinder assembly; 006. Upper end cap assembly; 007. Outlet water collection tank; 01-10. Water valve. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] See Figure 1 As shown;

[0033] A modular splicing device for ion exchange softening of oily wastewater, comprising:

[0034] The main body of the device has an inlet end connected to the raw water storage tank 001 via a pipe 008 and an outlet end connected to the outlet collection tank 007 via a pipe 009. A pump 002 is installed on the inlet pipe 008. Preferably, the pump 002 is a peristaltic pump in the prior art.

[0035] The main body of the device includes a lower end cap device 003, an upper end cap device 006, and at least one cylindrical device;

[0036] Baffles are installed inside the lower head device 003, the upper head device 006, and the cylindrical device. The water inlet at the bottom of the lower head device 003 is connected to the raw water storage tank 001 through the pipeline 008, and the water outlet at the top of the upper head device 006 is connected to the water collection tank 007 through the pipeline 009.

[0037] The lower end cap device 003 is connected to the cylindrical body device, and the cylindrical body device is connected to the upper end cap device 006 via pipelines (not shown). This allows the liquid entering through the inlet end of the device via pipeline 008 during operation to flow sequentially through the lower end cap device 003, the cylindrical body device, and the upper end cap device 006 before entering the outlet collection tank 007 via the outlet pipeline. The device also includes…

[0038] Several water valves 01-10, the water inlet and outlet of the lower head device 003, the upper head device 006, and the cylinder device are all equipped with water valves to cut off the connection with the pipeline, so as to facilitate the independent operation of the lower head device 003, the cylinder device, and the upper head device 006.

[0039] In operation, the oily wastewater, after being pumped by pump 002, first enters the lower head device 003. Due to the presence of baffles, the oily wastewater will fill the entire device, fully utilizing the ion exchange capacity of the resin. Since the wastewater enters the device from bottom to top, a large amount of oily wastewater will first undergo a preliminary ion exchange reaction with the resin in the lower head device 003. Afterward, it enters the cylindrical device 004 through the outlet of the lower head device 003 via pipeline, where it also undergoes a thorough ion exchange softening and hardening reaction through the baffles. Finally, it enters the upper head device 006 through the outlet of the cylindrical device 004. After undergoing a softening and hardening reaction, the effluent that meets the standards is collected in the storage tank 007.

[0040] Preferably, there are two cylindrical devices. Of course, more than two can be set according to actual usage requirements. This embodiment takes two as an example, cylindrical device 004 and cylindrical device 005. The two cylindrical devices are connected externally by a pipeline (not shown). The water inlet of cylindrical device 004 is equipped with a water valve 04 and the water outlet is equipped with a water valve 05. The water inlet of cylindrical device 005 is equipped with a water valve 06 and the water outlet is equipped with a water valve 07.

[0041] The cylindrical device and the lower head device 003, and the cylindrical device and the upper head device 006 can all be detachably and fixedly connected. Specifically, the top of the lower head device 003, both ends of the cylindrical device, and the bottom of the upper head device 006 can all be detachably and fixedly connected by bolt assemblies in the form of flanges. Of course, other disassembly and assembly structures in the prior art can be used to enable the lower head device 003, the cylindrical device, and the upper head device 006 to be removed and assembled in a modular manner.

[0042] Preferably, the lower end cap device 003 has two water inlets, with water valve 01 and water valve 02 installed at the water inlets respectively, and water valve 03 installed at the water outlet of the lower end cap device 003;

[0043] The upper end cap device 006 has two water outlets, with water valve 09 and water valve 10 installed at the water outlets respectively, and water valve 08 installed at the water inlet of the upper end cap device 006.

[0044] See Figure 1 As shown:

[0045] In a specific embodiment of the modular splicing device for ion exchange softening of oily wastewater provided by the utility model, Example 1:

[0046] Using a modular assembly device, when the oil content in oily wastewater is low, only one layer of modular cylindrical assembly 004 is required:

[0047] Oily wastewater, used as raw water, enters the lower head device 003 from the storage tank 001 via pump 002. First, it flows upwards through inlet valve 01 into the lower head device 003, then through pipeline connection to outlet valve 03 into inlet valve 04 of the modular cylindrical device 004. Next, through pipeline connection, it flows through outlet valve 05 into inlet valve 08 of the upper head device 006. Finally, the effluent flows through top outlet valve 09 of the upper head device 006 and is then piped to the qualified water collection device 007. Since the upper and lower head devices and the middle cylindrical device are independent, the resin in the lower head device 003 will be initially contaminated by the oily substances in the wastewater. As the reaction proceeds, the amount of contaminated resin in this device will gradually increase, but it will not significantly contaminate the resin in the cylindrical device 004 or the upper head device 006.

[0048] Example 2:

[0049] As the oil content in oily wastewater increases, a multi-layer modular cylindrical device 005 is added. Activated carbon is filled inside the lower end cap device 003. Ion exchange resin is filled in the cylindrical device 004, cylindrical device 005, and lower end cap device 006.

[0050] Example 2 follows the same process as Example 1, but mainly examines the role of the modular assembly device when the oil content in the oily wastewater increases. When the oil content in the wastewater increases, activated carbon can be filled into the lower end cap device 003 for initial oil removal. After initial oil removal, the wastewater enters the modular cylinder device 004 through the inlet valve 04, and then sequentially through water valves 05 and 06 into the modular cylinder device 005. The subsequent softening and hardening processes are the same as in Example 1 and will not be described in detail here. This operation ensures that when the oil content in the oily wastewater increases, the resin in the device will not be contaminated by the oil and prematurely fail.

[0051] Example 3:

[0052] Operating procedures for resin regeneration:

[0053] This embodiment mainly examines: when the resin in one of the following modules (lower head device 003, cylinder device 004, cylinder device 005, and lower head device 006) is completely contaminated with oil or needs to be regenerated due to saturation from the hardening reaction, it is not necessary to stop the entire process for a long time. Only the connection method of the pipeline needs to be changed to ensure the continuation of the hardening reaction.

[0054] The specific operation is as follows: When the resin in the lower head device 003 needs to be regenerated, the water outlet pipeline of pump 002 can be directly introduced into the cylinder device 004 through the water inlet valve 04. The subsequent process flow is the same as in Example 1, and will not be described in detail here. At the same time, the resin in the lower head device 003 can be regenerated. Since each modular device is independent, the ion exchange softening and hardening reaction and the resin regeneration reaction do not affect each other. After the resin in the lower head device 003 has been regenerated, the pipeline can be changed to continue repeating the process flow in Example 1. There will be no long-term shutdown of the reaction process, thus saving the reaction time of the entire process.

[0055] Example 4:

[0056] The procedure for replacing resin when it has completely failed is as follows:

[0057] This embodiment mainly examines the following: when the resin in one of the following modules—the lower end cap device 003, the cylinder device 004, the cylinder device 005, and the lower end cap device 006—completely fails and needs to be replaced, it is not necessary to stop the entire process for a long time. Only the connection method of the pipeline needs to be changed to ensure that the hardening reaction can continue.

[0058] The specific operation is as follows: When the resin in the lower head device 003 needs to be replaced, the water outlet pipeline of pump 002 can be directly introduced into the cylinder device 004 through the water inlet valve 04. The subsequent process flow is the same as in Example 1, and will not be described in detail here. At the same time, the lower head device 003 can be disassembled separately to replace the resin. Since each modular device is independent, the ion exchange softening and hardening reaction and the resin replacement do not affect each other. After the resin in the lower head device 003 is replaced, the pipeline can be changed to continue repeating the process flow in Example 1. There will be no long-term stoppage of the reaction process, thus saving the reaction time of the entire process.

[0059] Comparative Example 1:

[0060] Instead of using this modular splicing device, a conventional integrated device is used directly:

[0061] Oily wastewater, used as raw water, flows from storage tank 001 through pump 002, passing upwards through a conventional integrated device. The softened and dehardened effluent is then piped to a qualified effluent collection tank 007. Because this experimental process does not employ modularly assembled lower end cap device 003, cylinder device 004, cylinder device 005, and lower end cap device 006, as the reaction proceeds, the resin at the bottom of the integrated device is first contaminated by oily substances in the wastewater, and then the contaminated resin gradually increases upwards. Therefore, in this comparative example, the amount of contaminated resin is greater than in Example 1. Furthermore, due to the increased contaminated resin, the entire hardening reaction process is shortened, and the effluent failing to meet standards occurs earlier than in Example 1.

[0062] Comparative Example 2:

[0063] Without this modular splicing device, the resin in a conventional integrated device would be completely contaminated by oily substances or the resin would be saturated due to the hardening reaction, requiring the entire reaction to be stopped. Moreover, the amount of resin to be regenerated would be greater than in Example 3, the regeneration time would be longer, and the economic and time costs would be higher.

[0064] Comparative Example 3:

[0065] Without this modular splicing device, the resin in a conventional integrated device becomes completely ineffective. When resin replacement is needed, the entire reaction must be stopped to perform the resin replacement operation. Moreover, the amount of resin that needs to be replaced is greater than in Example 4, the operation time is longer, and the economic and time costs are higher.

[0066] In the above technical solution, this utility model provides a modular splicing device for ion exchange softening of oily wastewater. It mainly includes an upper end cap device 003, at least one layer of modular cylindrical device, and a lower end cap device 006. Both the cylindrical device and the end caps have a baffle effect, and the hydraulic residence time of the fluid can be changed by varying the number of cylindrical devices, ensuring maximum ion exchange efficiency. Simultaneously, the variation in the number of cylindrical devices can also provide a buffering and isolation effect. When the oil content in the oily wastewater is high, the end caps and cylindrical devices on the inlet side can remove the oil by filling with activated carbon or other substances, preventing significant contamination of the ion exchange resin and avoiding increased contamination and economic costs. This modular splicing device features a simple structure, high ion exchange efficiency, easy resin regeneration and replacement after failure, convenient resin regeneration operation, and the ability to simultaneously carry out ion exchange softening and resin regeneration reactions within the same device, resulting in low operating costs. It enables long-term operation of the ion exchange resin softening and hardening reaction, and has great application potential.

[0067] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A modular assembly device for ion exchange softening of oily wastewater, comprising: The device body is connected to the raw water storage tank (001) at the inlet end and to the outlet water collection tank (007) at the outlet end, wherein a pump (002) is installed on the pipeline at the inlet end of the device body, characterized in that: The main body of the device includes a lower end cap device (003), an upper end cap device (006); and At least one cylindrical assembly, wherein the lower end cap assembly (003) is externally connected to the cylindrical assembly, and the cylindrical assembly is externally connected to the upper end cap assembly (006) via pipelines; further comprising... Several water valves are installed at the inlet and outlet of the lower end cap device (003), the upper end cap device (006), and the cylindrical device to cut off the connection with the pipeline.

2. The modular splicing device for ion exchange softening of oily wastewater according to claim 1, characterized in that: The cylindrical device comprises two cylinders, which are connected externally by pipelines.

3. A modular splicing device for ion exchange softening of oily wastewater according to claim 2, characterized in that: The cylindrical device and the lower end cap device (003), and the cylindrical device and the upper end cap device (006) can be detachably and fixedly connected.

4. A modular splicing device for ion exchange softening of oily wastewater according to claim 1, characterized in that: The lower end cap device (003) has two water inlets, each of which is equipped with a water valve.

5. A modular splicing device for ion exchange softening of oily wastewater according to claim 1, characterized in that: The upper end cap device (006) has two water outlets, each of which is equipped with a water valve.

6. A modular splicing device for ion exchange softening of oily wastewater according to any one of claims 1-5, characterized in that: The lower end cap device (003), the upper end cap device (006), and the cylindrical body device are all equipped with baffles.

7. A modular splicing device for ion exchange softening of oily wastewater according to any one of claims 1-5, characterized in that: The pump (002) is a peristaltic pump.

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