An environmentally friendly resin impurity removal waste liquid neutralization device and gas field water treatment system

Abstract

This utility model relates to the field of gas field water treatment equipment, specifically to an environmentally friendly resin impurity removal waste liquid neutralization device and a gas field water treatment system. The device includes an inlet diversion component (100), a boron removal circulation branch, and a calcium and magnesium removal circulation branch. Each branch is equipped with a boron removal wastewater tank (200) and a calcium and magnesium removal wastewater tank (300), and the two branches are interconnected via pipelines. The device uses the inlet diversion component to selectively or jointly introduce the waste liquid generated from resin cleaning into one of the two branches, and utilizes valve group control to achieve waste liquid circulation within a single branch or a large-scale circulation in series between the two branches. Integrating the above-mentioned resin impurity removal waste liquid neutralization device into the gas field water treatment system, connecting it with the resin impurity removal unit, achieves flexible and efficient neutralization of the waste liquid, significantly reduces the corrosion of the conveying pipeline by acidic waste liquid, and ensures that emissions meet standards through automated control. It has the advantages of simple modification and low cost.

Description

Technical Field

[0001] This utility model relates to the field of gas field water treatment equipment, specifically to an environmentally friendly resin impurity removal waste liquid neutralization device and a gas field water treatment system. Background Technology

[0002] Gas field water is high-salinity wastewater found in oil and gas field formations, often containing various elements such as lithium, boron, potassium, and magnesium. In the process of resource recovery or standard treatment of gas field water using resin adsorption technology, saturated resin needs to be regenerated and cleaned to restore the ion exchange capacity of the resin. The resin regeneration process typically involves using strong acids (such as hydrochloric acid or sulfuric acid) or strong bases (such as sodium hydroxide) as regenerants. Through backwashing, the adsorbed ions are displaced from the resin and discharged with the regeneration waste liquid. These acidic and alkaline waste liquids, due to their high concentrations of acidic and alkaline components and the displaced ions, often exhibit strong corrosiveness and polluting properties, requiring proper treatment and disposal.

[0003] In existing technologies, acidic and alkaline wastewater generated at different times is often transported directly to a centralized wastewater tank via long-distance pipelines for mixing and neutralization. This method has significant drawbacks: First, the long-distance transportation of acidic and alkaline wastewater causes severe corrosion to the pipelines, shortening their lifespan and increasing maintenance costs. Second, because the acid washing and alkaline washing steps are performed alternately, the acidic wastewater generated earlier and the alkaline wastewater generated later are separated in time and space, making it difficult to mix and neutralize them instantly and thoroughly in the wastewater tank. This may result in localized over-acidity or over-alkalinity, affecting the neutralization effect and increasing the load on subsequent treatment. Third, the treatment process is rigid and cannot be flexibly adjusted and efficiently treated according to the real-time water quality (such as pH value) of the wastewater.

[0004] Therefore, in order to effectively treat acidic and alkaline wastewater from gas fields and reduce its impact on the environment and pipelines, it is necessary to optimize the neutralization treatment scheme for acidic and alkaline wastewater in the gas field water treatment system. Utility Model Content

[0005] To address the unsatisfactory neutralization treatment solutions for acid and alkali waste liquids in existing gas field water treatment systems, this invention provides an environmentally friendly resin impurity removal waste liquid neutralization device and a gas field water treatment system. This device rapidly and effectively neutralizes acid and alkali waste liquids generated by resin adsorption lithium extraction devices, avoiding corrosion of pipelines during long-distance transportation.

[0006] Firstly, this utility model provides an environmentally friendly resin impurity removal waste liquid neutralization device for neutralizing waste liquid generated from cleaning resin.

[0007] The inlet of the device is connected to a boron removal circulation branch equipped with a boron removal wastewater tank and a calcium and magnesium removal circulation branch equipped with a calcium and magnesium removal wastewater tank via a liquid inlet diverter. Both the boron removal circulation branch and the calcium and magnesium removal circulation branch are pipelines with control valves, and the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected.

[0008] To better realize this utility model, preferably, the liquid inlet diverter has at least one liquid inlet end and two liquid outlet ends; the liquid inlet diverter adopts a multi-way valve, or the diverter adopts a multi-way control assembly composed of a multi-way pipe joint and a valve.

[0009] To better realize this utility model, preferably, the multi-way valve is a three-way valve.

[0010] To better realize this utility model, preferably, it also includes a liquid alkali injection device for providing alkali solution and a mixer installed on the boron removal circulation branch; the liquid alkali injection device is connected to the inlet end of the mixer, and the mixer is installed before the first connection point between the boron removal circulation branch and the calcium and magnesium removal circulation branch.

[0011] To better realize this utility model, preferably, the liquid alkali injection device includes an alkali tank for storing alkali solution and a metering pump for controlling the flow rate.

[0012] To better realize this utility model, preferably, the tail liquid output end of the boron removal circulation branch and the tail liquid output end of the calcium and magnesium removal circulation branch are respectively connected to the neutralization liquid buffer tank; the neutralization liquid buffer tank is provided with a diversion pipe for introducing the neutralization liquid into one or more devices in the tail liquid impurity removal unit, backwashing unit, pretreatment unit, and sewage tank.

[0013] The resin impurity removal waste liquid neutralization device includes an inlet diversion component, a boron removal circulation branch, and a calcium and magnesium removal circulation branch. Each branch is equipped with a boron removal wastewater tank and a calcium and magnesium removal wastewater tank, respectively, and the two branches are interconnected via pipelines. The device uses the inlet diversion component to selectively or jointly introduce the waste liquid generated from resin cleaning into one of the two branches. Valve control allows for waste liquid circulation within a single branch or a large-scale circulation between the two branches. Integrating this resin impurity removal waste liquid neutralization device into the gas field water treatment system, connecting it to the resin impurity removal unit, achieves flexible and efficient neutralization of the waste liquid, significantly reduces the corrosion of transport pipelines by acidic waste liquid, and ensures compliance with emission standards through automated control. It offers advantages such as simple modification and low cost.

[0014] Secondly, this utility model provides a gas field water treatment system.

[0015] Specifically, a gas field water treatment system includes a resin adsorption lithium extraction device, a resin impurity removal device, and the aforementioned waste liquid neutralization device; the resin impurity removal device is connected to the resin adsorption lithium extraction device and is used to clean the resin; the waste liquid neutralization device is connected to the resin impurity removal device and is used to neutralize the waste liquid generated from cleaning the resin.

[0016] To better realize this utility model, preferably, the resin adsorption lithium extraction device includes a pretreatment unit, a continuous ion exchange treatment unit, a tail liquid impurity removal unit, a tail liquid buffer tank, and a sewage tank connected in sequence; the resin impurity removal device includes a backwashing unit, an acid washing unit, a water washing unit, and an alkaline washing unit for cleaning resin, which are respectively connected to the continuous ion exchange treatment unit; the output end of the waste liquid neutralization device is respectively connected to the pretreatment unit, the backwashing unit, the tail liquid impurity removal unit, and the sewage tank.

[0017] The core objective of this invention is to solve the problem of waste acid and alkali liquid treatment generated during resin regeneration in resin impurity removal units, and to achieve waste liquid reuse. Compared with traditional resin impurity removal units, this invention not only improves environmental performance but also has significant advantages in cost control. Preliminary estimates indicate that the entire renovation project will cost only 12,000 yuan, making it extremely cost-effective.

[0018] In implementing the modification scheme using the device described in this utility model, special attention is paid to protecting existing equipment, completely avoiding any destructive operations that could damage the equipment itself, such as drilling holes. Instead, by adding some necessary pipes, valves, and pH adjustment devices, we can achieve system upgrades and functional expansion. This modification method not only reduces physical intervention in the equipment but also lowers the risks and complexity of the modification process, maximizing functionality and optimizing costs by minimizing modifications to existing equipment. Furthermore, the introduction of an automated control system ensures that the wastewater consistently meets emission standards at all times, reducing the inconvenience and errors caused by manual monitoring and adjustment, and providing a solid technical guarantee for the company's environmental compliance and efficient operation.

[0019] The main beneficial effects of this utility model are as follows.

[0020] This utility model provides an environmentally friendly resin impurity removal waste liquid neutralization device. By connecting the boron removal circulation branch with the calcium and magnesium removal circulation branch and setting corresponding control valves, it can flexibly realize multiple working modes such as single tank circulation and double tank series large circulation. It not only expands the waste liquid buffer capacity, but also effectively promotes the mixing and neutralization reaction of acidic and alkaline waste liquids in the system, thereby improving the neutralization efficiency.

[0021] This utility model provides an environmentally friendly resin impurity removal waste liquid neutralization device. By setting up a liquid alkali injection device, a mixer and an automatic control system, it can add neutralizing agent in real time and accurately according to the pH value of the waste liquid, ensuring that the treated waste liquid meets the standards stably, reducing manual intervention and errors, and improving the automation and reliability of the treatment.

[0022] This utility model provides an environmentally friendly resin impurity removal waste liquid neutralization device. By setting up a neutralization liquid buffer tank, the neutralized wastewater is reused in tail liquid impurity removal, backwashing, pretreatment and other units, realizing the cascade recycling of wastewater resources, achieving the effect of "treating waste with waste", and reducing fresh water consumption and overall operating costs.

[0023] The present invention provides a gas field water treatment system with a compact structure and simple modification. It is mainly achieved by adding pipe fittings, valves and control units, without the need for destructive modifications to existing equipment. The modification cost is low and it is easy to promote and apply in existing gas field water treatment systems. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the principle of waste liquid being treated once in a boron removal wastewater tank and once in a calcium and magnesium removal wastewater tank before being transported to the sewage pool in Example 1.

[0025] Figure 2 This is a schematic diagram illustrating the principle of waste liquid being recycled through a boron removal wastewater tank and a calcium and magnesium removal wastewater tank before being transported to the sewage pond in Example 1.

[0026] Figure 3 This is a schematic block diagram of the main structure of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 2, wherein the boron removal circulation branch and the calcium and magnesium removal circulation branch can be connected.

[0027] Figure 4 for Figure 3 The diagram shows the working principle of an environmentally friendly resin impurity removal waste liquid neutralization device with only the boron removal circulation branch operating. The bold arrow indicates the flow path of the waste liquid entering the boron removal circulation branch.

[0028] Figure 5 for Figure 3 The diagram shows the working principle of an environmentally friendly resin-based waste liquid neutralization device that only removes calcium and magnesium from the circulation branch. The bold arrows indicate the flow path of the waste liquid entering the calcium and magnesium removal circulation branch.

[0029] Figure 6 for Figure 3 The diagram shows the working principle of an environmentally friendly resin impurity removal waste liquid neutralization device, in which the boron removal circulation branch and the calcium and magnesium removal circulation branch work together. The bold arrows indicate the flow path of the waste liquid into the interconnected boron removal circulation branch and the calcium and magnesium removal circulation branch.

[0030] Figure 7 This is a schematic diagram of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 3; however, the liquid alkali injection device and mixer are not included.

[0031] Figure 8 This is a schematic diagram of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 3; it includes a liquid alkali injection device and a mixer.

[0032] Figure 9 This is a schematic diagram of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 4; however, the liquid alkali injection device and mixer are not included.

[0033] Figure 10 This is a schematic diagram of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 4; it includes a liquid alkali injection device and a mixer.

[0034] Figure 11 This is a schematic diagram of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 5.

[0035] Figure 12 This is a schematic diagram of an environmentally friendly resin impurity removal waste liquid neutralization device in Example 6.

[0036] Figure 13 This is a schematic diagram of a gas field water treatment system in Example 7.

[0037] Among them, 100 is the liquid inlet diversion component; 200 is the boron removal wastewater tank; 300 is the calcium and magnesium removal wastewater tank; 400 is the alkali tank; 500 is the mixer; and 600 is the neutralization liquid buffer tank. 1. First valve; 2. Second valve; 3. Third valve; 4. Metering pump; 5. Fifth valve; 6. Sixth valve; 7. Seventh valve; 8. First output pump; 9. Second output pump; 401. First tee connector; 402. Second tee connector; 403. Third tee connector; 404. Fourth tee connector. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0039] The resin regeneration process in gas field water treatment systems involves steps such as backwashing, acid washing, water washing, and alkali washing, generating a certain amount of acidic and alkaline wastewater. This wastewater poses a serious threat to the environment, not only polluting water resources and causing significant water quality deterioration, but also severely threatening the growth and reproduction of aquatic organisms, disrupting the food chain, and consequently affecting biodiversity and ecological balance. Therefore, addressing the issue of acidic and alkaline wastewater treatment during resin regeneration is urgently needed.

[0040] like Figure 1 As shown, this embodiment provides a resin impurity removal waste liquid neutralization device, including two unidirectional wastewater treatment branches; one wastewater treatment branch is equipped with a boron removal wastewater tank 200 with a pressure pump, and the other wastewater treatment branch is equipped with a calcium and magnesium removal wastewater tank 300 with a pressure pump; wastewater is introduced into the boron removal wastewater tank 200 or the calcium and magnesium removal wastewater tank 300 for neutralization treatment according to the pH value.

[0041] To ensure a complete neutralization reaction, one output terminal of the pressure pump is connected back to the inlet terminal of the wastewater tank for waste liquid recycling. For example... Figure 2 As shown, a resin impurity removal waste liquid neutralization device includes two separate circulating wastewater treatment branches. Example

[0042] The resin regeneration process in the gas field water treatment system requires steps such as backwashing, acid washing, water washing, and alkali washing. Based on long-term on-site operation, the following three problems may arise during the regeneration process.

[0043] Question 1: After cleaning a resin tank, 10-15m³ of acid and alkali waste liquid will be generated. The cleaning waste liquid buffer tank is 10m³. Therefore, in on-site operation, the acid and alkali waste liquid often needs to be transferred to the sewage tank before a cleaning process is completed.

[0044] Question 2: The acid regeneration step in the cleaning process requires 30% acid, such as hydrochloric acid, at a rate of about 250-350 L / h. The subsequent alkaline washing requires 30% alkaline solution at a rate of about 150-200 L / h. Often, the waste liquid transferred first has a lower acidity, while the waste liquid transferred later has a higher alkalinity, and the two are not completely neutralized.

[0045] Question 3: Even if all waste liquid is neutralized, the relative concentration of acid remains high, resulting in an overall acidic waste liquid with a pH value typically below 3. Discharging such waste liquid into a sewage treatment plant will not only erode the plant's structure but may also cause severe corrosion damage to equipment such as transfer pumps.

[0046] To address any one or more of the aforementioned problems, this embodiment provides an environmentally friendly resin impurity removal waste liquid neutralization device for neutralizing waste liquid generated during resin cleaning. The inlet of the device receives acid washing waste liquid and / or alkaline washing waste liquid from the resin impurity removal device via a liquid inlet diverter 100. Figure 3 As shown, the inlet end of the device is connected to a boron removal circulation branch equipped with a boron removal wastewater tank 200 and a calcium and magnesium removal circulation branch equipped with a calcium and magnesium removal wastewater tank 300 via a liquid inlet diverter 100. Both the boron removal circulation branch and the calcium and magnesium removal circulation branch are pipelines with control valves, and the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected.

[0047] when Figure 3 When the resin impurity removal waste liquid neutralization device shown only requires the boron removal circulation branch to operate, such as Figure 4 As shown, the waste liquid only circulates in the boron removal circulation branch and is discharged into the sewage tank after reaching the design target.

[0048] when Figure 3 When the resin impurity removal waste liquid neutralization device shown only requires the calcium and magnesium removal circulation branch to operate, such as Figure 5 As shown, the waste liquid only circulates in the calcium and magnesium removal circulation branch, and is discharged into the sewage pond after reaching the design target.

[0049] when Figure 3 When the resin impurity removal waste liquid neutralization device shown requires the boron removal circulation branch and the calcium and magnesium removal circulation branch to work together, such as... Figure 6 As shown, the waste liquid first enters the boron removal circulation branch, then the calcium and magnesium removal circulation branch, and then flows back to the boron removal circulation branch to achieve a large circulation until the design target is achieved before being discharged into the sewage tank.

[0050] The resin impurity removal waste liquid neutralization device provided in this embodiment has two design highlights: First, the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected, and the waste liquid flow path is changed through the control valve on the pipeline. This not only enables single-branch circulation of the boron removal circulation branch or the calcium and magnesium removal circulation branch, but also enables large-scale coordinated circulation of the boron removal circulation branch and the calcium and magnesium removal circulation branch. Second, the inlet end of the device is equipped with an inlet diverter 100, and the waste liquid entry method is controlled by the inlet diverter 100.

[0051] In another specific embodiment, the liquid inlet diversion component 100 has at least one inlet end and two outlet ends; the liquid inlet diversion component 100 adopts a multi-way valve, or the diversion component adopts a multi-way control assembly composed of a multi-way pipe joint and a valve. Typically, the multi-way valve is a three-way valve. For ease of explanation, the three ports of the three-way valve are labeled as port A, port B, and port C; port A of the three-way valve serves as the inlet for receiving waste liquid, port B connects to the boron removal circulation branch, and port C connects to the calcium and magnesium removal circulation branch, thus realizing the diversion treatment of waste liquid, greatly improving the flexibility and efficiency of waste liquid treatment, and making the treatment process smoother and more efficient.

[0052] In another specific embodiment, three-way valves, four-way valves and other transfer and diversion components are cleverly added to the output end of the boron removal wastewater tank 200 and the calcium and magnesium removal wastewater tank 300 to form branch pipelines that can connect the boron removal circulation branch and the calcium and magnesium removal circulation branch, so that the originally single waste liquid pipeline can be flexibly adapted. Example

[0053] This embodiment is based on embodiment 2.

[0054] The aforementioned environmentally friendly resin impurity removal waste liquid neutralization device, such as Figure 7 As shown, it includes a first output pump 8, a second output pump 9, a first valve 1, a second valve 2, a third valve 3, a fifth valve 5, a sixth valve 6, a first tee connector 401, and a second tee connector 402; The boron removal wastewater tank 200, the first output pump 8, the first valve 1, the first three-way connector 401, the second valve 2, the second three-way connector 402, and the third valve 3 are sequentially arranged on the boron removal circulation branch to form a boron removal circuit. The calcium and magnesium removal wastewater tank 300, the second output pump 9, the sixth valve 6, the second three-way connector 402, the second valve 2, the first three-way connector 401, and the fifth valve 5 are sequentially arranged on the calcium and magnesium removal circulation branch to form a calcium and magnesium removal circuit. The pipeline connecting the first tee connector 401 and the second tee connector 402 and equipped with the second valve 2 is referred to as the common pipeline, and the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected through the common pipeline.

[0055] The device described in this embodiment can control the boron removal circulation branch or the calcium and magnesium removal circulation branch to operate independently through a valve control mechanism. It can also connect the branches containing the two waste liquid tanks, greatly expanding the waste liquid storage capacity. Simultaneously, it ensures, to a certain extent, that the acid-washed waste liquid and the alkaline-washed waste liquid make sufficient contact and react within the tanks or pipelines, achieving an ideal neutralization effect. This not only improves the waste liquid treatment efficiency but also significantly increases the waste liquid reuse rate, maximizing resource utilization.

[0056] Specifically, the device described in this embodiment has three typical operating modes.

[0057] In the first working mode of the device described in this embodiment: when the first output pump 8, the first valve 1, the second valve 2, and the third valve 3 are open, and the second output pump 9 and the sixth valve 6 are closed, the waste liquid introduced into the boron removal wastewater tank 200 through the liquid inlet diversion component 100 circulates in the boron removal circulation branch until the process parameters are met.

[0058] The second working mode of the device described in this embodiment: when the first output pump 8, the first valve 1, and the third valve 3 are closed, and the second output pump 9, the sixth valve 6, and the second valve 2 are open, the waste liquid introduced into the calcium and magnesium removal wastewater tank 300 through the liquid inlet diversion component 100 circulates in the calcium and magnesium removal circulation branch until the process indicators are met.

[0059] The third operating mode of the device described in this embodiment: When the first output pump 8, the first valve 1, the fifth valve 5, the second output pump 9, the sixth valve 6, and the third valve 3 are open, and the second valve 2 is closed, the waste liquid of the boron removal wastewater tank 200 is introduced through the liquid inlet diversion component 100, passes through the first output pump 8, the first valve 1, and the fifth valve 5 in sequence and enters the calcium and magnesium removal wastewater tank 300, and then flows back to the boron removal wastewater tank 200 through the second output pump 9, the sixth valve 6, and the third valve 3.

[0060] In a specific production process, the process control parameter is pH value 6-8.

[0061] In another specific implementation, such as Figure 8 As shown, the apparatus further includes a liquid alkali injection device for providing alkali solution and a mixer 500 installed on the boron removal circulation branch. The liquid alkali injection device is connected to the inlet end of the mixer 500, and the mixer 500 is installed between the first output pump 8 and the first tee connector 401.

[0062] Furthermore, the liquid alkali injection device includes an alkali tank 400 for storing alkali solution and a metering pump 4, which can precisely control the amount of liquid alkali added, ensuring that each addition is just right. Meanwhile, the high-efficiency pipeline mixer 500 facilitates rapid and thorough mixing of the waste liquid and liquid alkali within the pipeline, significantly improving the efficiency and quality of waste liquid treatment.

[0063] Furthermore, the device is equipped with an automatic control system. When the system detects that the pH value of the waste liquid is too low, it can automatically trigger the alkali injection device to precisely inject an appropriate amount of alkali solution into the waste liquid for neutralization. This automated control mechanism ensures that the waste liquid consistently meets discharge standards at all times, not only avoiding the tediousness and errors of manual monitoring and adjustment but also improving the overall intelligence level of the treatment process. The automatic control system not only achieves precise monitoring but also optimizes the waste liquid treatment process, enabling self-circulation of boron- and calcium- and magnesium-removal waste liquid. Even if the regenerated waste liquid exceeds 10 m³, the system can easily accept it, thereby improving the system's waste liquid treatment capacity. This has significant practical implications for environmental protection and resource conservation.

[0064] Furthermore, this invention demonstrates a significant advantage in cost control. Preliminary estimates indicate that the entire renovation project will cost only 12,000 yuan, making it extremely cost-effective.

[0065] The other parts of this embodiment are the same as those in Embodiment 2, so they will not be described again. Example

[0066] This embodiment is based on embodiment 2.

[0067] The aforementioned environmentally friendly resin impurity removal waste liquid neutralization device, such as Figure 9 As shown, it includes a first output pump 8, a second output pump 9, a first valve 1, a second valve 2, a third valve 3, a fifth valve 5, a sixth valve 6, a seventh valve 7, a first tee connector 401, a second tee connector 402, and a third tee connector 403; The boron removal wastewater tank 200, the first output pump 8, the first valve 1, the first three-way connector 401, the second valve 2, the second three-way connector 402, and the third valve 3 are sequentially arranged on the boron removal circulation branch to form a boron removal circuit. The calcium and magnesium removal wastewater tank 300, the second output pump 9, the sixth valve 6, the third three-way connector 403, and the seventh valve 7 are sequentially arranged on the calcium and magnesium removal circulation branch to form a calcium and magnesium removal circuit. The first tee connector 401 is connected to the calcium and magnesium removal wastewater tank 300 through a first intermediate pipeline equipped with the fifth valve 5, and the second tee connector 402 is connected to the third tee connector 403 through a second intermediate pipeline; that is, the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected through the first intermediate pipeline and the second intermediate pipeline.

[0068] The device described in this embodiment can control the boron removal circulation branch or the calcium and magnesium removal circulation branch to operate independently through a valve control mechanism. It can also connect the branches containing the two waste liquid tanks, greatly expanding the waste liquid storage capacity. Simultaneously, it ensures, to a certain extent, that the acid-washed waste liquid and the alkaline-washed waste liquid make sufficient contact and react within the tanks or pipelines, achieving an ideal neutralization effect. This not only improves the waste liquid treatment efficiency but also significantly increases the waste liquid reuse rate, maximizing resource utilization.

[0069] Specifically, the device described in this embodiment has three typical operating modes.

[0070] In the first working mode of the device described in this embodiment: when the first output pump 8, the first valve 1, the second valve 2, and the third valve 3 are open, and the second output pump 9 and the sixth valve 6 are closed, the waste liquid introduced into the boron removal wastewater tank 200 through the liquid inlet diversion component 100 circulates in the boron removal circulation branch until the process parameters are met.

[0071] The second working mode of the device described in this embodiment: when the first output pump 8, the first valve 1, the second valve 2, the third valve 3, and the fifth valve 5 are closed, and the second output pump 9, the sixth valve 6, and the seventh valve 7 are open, the waste liquid introduced into the calcium and magnesium removal wastewater tank 300 through the liquid inlet diversion component 100 circulates in the calcium and magnesium removal circulation branch until the process indicators are met.

[0072] The third operating mode of the device described in this embodiment: When the first output pump 8, the first valve 1, the fifth valve 5, the second output pump 9, the sixth valve 6, and the third valve 3 are open, and the second valve 2 and the seventh valve 7 are closed, the waste liquid of the boron removal wastewater tank 200 is introduced through the liquid inlet diversion component 100, passes through the first output pump 8, the first valve 1, and the fifth valve 5 in sequence and enters the calcium and magnesium removal wastewater tank 300, and then flows back to the boron removal wastewater tank 200 through the second output pump 9, the sixth valve 6, and the third valve 3.

[0073] In a specific production process, the process control parameter is pH value 6-8.

[0074] In another specific implementation, such as Figure 10 As shown, the apparatus further includes a liquid alkali injection device for providing alkali solution and a mixer 500 installed on the boron removal circulation branch. The liquid alkali injection device is connected to the inlet end of the mixer 500, and the mixer 500 is installed between the first output pump 8 and the first tee connector 401.

[0075] Furthermore, the liquid alkali injection device includes an alkali tank 400 for storing alkali solution and a metering pump 4, which can precisely control the amount of liquid alkali added, ensuring that each addition is just right. Meanwhile, the high-efficiency pipeline mixer 500 facilitates rapid and thorough mixing of the waste liquid and liquid alkali within the pipeline, significantly improving the efficiency and quality of waste liquid treatment.

[0076] Furthermore, the device is equipped with an automatic control system. When the system detects that the pH value of the waste liquid is too low, it can automatically trigger the alkali injection device to precisely inject an appropriate amount of alkali solution into the waste liquid for neutralization. This automated control mechanism ensures that the waste liquid consistently meets discharge standards at all times, not only avoiding the tediousness and errors of manual monitoring and adjustment but also improving the overall intelligence level of the treatment process. The automatic control system not only achieves precise monitoring but also optimizes the waste liquid treatment process, enabling self-circulation of boron- and calcium- and magnesium-removal waste liquid. Even if the regenerated waste liquid exceeds 10 m³, the system can easily accept it, thereby improving the system's waste liquid treatment capacity. This has significant practical implications for environmental protection and resource conservation.

[0077] Furthermore, this invention demonstrates a significant advantage in cost control. Preliminary estimates indicate that the entire renovation project will cost only 12,000 yuan, making it extremely cost-effective.

[0078] The other parts of this embodiment are the same as those in Embodiment 2, so they will not be described again. Example

[0079] This embodiment is based on embodiment 2.

[0080] The aforementioned environmentally friendly resin impurity removal waste liquid neutralization device, such as Figure 11 As shown, it includes a first output pump 8, a second output pump 9, a first valve 1, a second valve 2, a third valve 3, a fifth valve 5, a sixth valve 6, a seventh valve 7, a first tee connector 401, a second tee connector 402, a third tee connector 403, and a fourth tee connector 404. The boron removal wastewater tank 200, the first output pump 8, the first valve 1, the first three-way connector 401, the second valve 2, the second three-way connector 402, and the third valve 3 are sequentially arranged on the boron removal circulation branch to form a boron removal circuit. The calcium and magnesium removal wastewater tank 300, the second output pump 9, the sixth valve 6, the third three-way connector 403, the seventh valve 7, and the fourth three-way connector 404 are sequentially arranged on the calcium and magnesium removal circulation branch to form a calcium and magnesium removal circuit. The first tee connector 401 and the fourth tee connector 404 are connected through a third intermediate pipeline equipped with the fifth valve 5, and the second tee connector 402 and the third tee connector 403 are connected through a fourth intermediate pipeline; that is, the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected through the third intermediate pipeline and the fourth intermediate pipeline.

[0081] The device described in this embodiment can control the boron removal circulation branch or the calcium and magnesium removal circulation branch to operate independently through a valve control mechanism. It can also connect the branches containing the two waste liquid tanks, greatly expanding the waste liquid storage capacity. Simultaneously, it ensures, to a certain extent, that the acid-washed waste liquid and the alkaline-washed waste liquid make sufficient contact and react within the tanks or pipelines, achieving an ideal neutralization effect. This not only improves the waste liquid treatment efficiency but also significantly increases the waste liquid reuse rate, maximizing resource utilization.

[0082] Specifically, the device described in this embodiment has three typical operating modes.

[0083] In the first operating mode of the device described in this embodiment: when the first output pump 8, the first valve 1, the second valve 2, and the third valve 3 are open, and the second output pump 9, the sixth valve 6, the seventh valve 7, and the fifth valve 5 are closed, the waste liquid introduced into the boron removal wastewater tank 200 through the liquid inlet diversion component 100 circulates in the boron removal circulation branch until the process parameters are met.

[0084] The second operating mode of the device described in this embodiment: when the first output pump 8, the first valve 1, the third valve 3, and the fifth valve 5 are closed, and the second output pump 9, the sixth valve 6, and the seventh valve 7 are open, the waste liquid introduced into the calcium and magnesium removal wastewater tank 300 through the liquid inlet diversion component 100 circulates in the calcium and magnesium removal circulation branch until the process indicators are met.

[0085] The third operating mode of the device described in this embodiment: When the first output pump 8, the first valve 1, the fifth valve 5, the second output pump 9, the sixth valve 6, and the third valve 3 are open, and the second valve 2 and the seventh valve are closed, the waste liquid of the boron removal wastewater tank 200 is introduced through the liquid inlet diversion component 100, passes through the first output pump 8, the first valve 1, and the fifth valve 5 in sequence and enters the calcium and magnesium removal wastewater tank 300, and then flows back to the boron removal wastewater tank 200 through the second output pump 9, the sixth valve 6, and the third valve 3.

[0086] In a specific production process, the process control parameter is pH value 6-8.

[0087] In another specific embodiment, the apparatus further includes a liquid alkali injection device for providing alkali solution and a mixer 500 installed on the boron removal circulation branch. The liquid alkali injection device is connected to the inlet end of the mixer 500, and the mixer 500 is installed between the first output pump 8 and the first tee connector 401.

[0088] Furthermore, the liquid alkali injection device includes an alkali tank 400 for storing alkali solution and a metering pump 4, which can precisely control the amount of liquid alkali added, ensuring that each addition is just right. Meanwhile, the high-efficiency pipeline mixer 500 facilitates rapid and thorough mixing of the waste liquid and liquid alkali within the pipeline, significantly improving the efficiency and quality of waste liquid treatment.

[0089] Furthermore, the device is equipped with an automatic control system. When the system detects that the pH value of the waste liquid is too low, it can automatically trigger the alkali injection device to precisely inject an appropriate amount of alkali solution into the waste liquid for neutralization. This automated control mechanism ensures that the waste liquid consistently meets discharge standards at all times, not only avoiding the tediousness and errors of manual monitoring and adjustment but also improving the overall intelligence level of the treatment process. The automatic control system not only achieves precise monitoring but also optimizes the waste liquid treatment process, enabling self-circulation of boron- and calcium- and magnesium-removal waste liquid. Even if the regenerated waste liquid exceeds 10 m³, the system can easily accept it, thereby improving the system's waste liquid treatment capacity. This has significant practical implications for environmental protection and resource conservation.

[0090] Furthermore, this invention demonstrates a significant advantage in cost control. Preliminary estimates indicate that the entire renovation project will cost only 12,000 yuan, making it extremely cost-effective.

[0091] The other parts of this embodiment are the same as those in Embodiment 2, so they will not be described again. Example

[0092] Based on any one of Examples 1-5, this embodiment adds a neutralization liquid buffer tank 600 to the waste liquid neutralization device.

[0093] like Figure 12 As shown, the waste liquid neutralization device is based on the structure in Embodiment 3, with the addition of a neutralization liquid buffer tank 600. The tail liquid output ends of the first output pump 8 and the second output pump 9 are respectively connected to the neutralization liquid buffer tank 600; the neutralization liquid buffer tank 600 is equipped with a diversion pipe for diverting the neutralized liquid to other treatment units in the gas field water treatment system. That is to say, the neutralized liquid obtained by the waste liquid neutralization device can be directly discharged into the sewage tank, or it can be returned to one or more of the tail liquid impurity removal unit, backwashing unit, and pretreatment unit.

[0094] Analysis revealed that the pickling wastewater generated during resin regeneration primarily consisted of high concentrations of divalent metal ions such as Ca²⁺, Mg²⁺, Ba²⁺, and Sr²⁺, along with their corresponding chloride salts. Neutralization treatment using a wastewater neutralization device not only adjusted the pH value but also simultaneously removed some ions, such as Mg²⁺, that readily form hydroxide precipitates. Therefore, the neutralized wastewater exhibited the following characteristics: neutral pH, high total dissolved solids, but a significantly reduced concentration of hardness ions that contribute to scaling compared to the original wastewater.

[0095] Based on its unique water quality characteristics, this embodiment reuses the water in the air flotation unit, which has low sensitivity to hardness but requires a large amount of water, as well as in the tail liquid removal unit within the process. This forms a "tiered reuse and water quality matching" system, achieving "waste treatment with waste" and maximizing the recycling of water resources without affecting the main process.

[0096] Reuse Point 1: Tail Liquid Impurity Removal Unit. The neutralized wastewater is used as the influent or process makeup water for this process, realizing "waste treatment with waste," and the divalent ions in it participate in precipitation as reaction substrates.

[0097] Reuse point two: Dissolved air flotation system in the pretreatment unit. Serving as a supplementary source for dissolved air water, it has low hardness and a low risk of scaling.

[0098] Reuse point 3: Backwash unit, as a replenishment solution for backwashing.

[0099] In summary, the addition of new reuse points has altered the structure of traditional gas field water treatment systems.

[0100] The other parts of this embodiment are the same as those of Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, or Embodiment 5, and therefore will not be described again. Example

[0101] This embodiment provides a gas field water treatment system based on any one of Embodiments 1-6.

[0102] A gas field water treatment system, such as Figure 13 As shown, it includes a resin adsorption lithium extraction device, a resin impurity removal device, and the aforementioned waste liquid neutralization device; the resin impurity removal device is connected to the resin adsorption lithium extraction device and is used to clean the resin; the waste liquid neutralization device is connected to the resin impurity removal device and is used to neutralize the waste liquid generated from cleaning the resin.

[0103] Furthermore, the resin adsorption lithium extraction device includes a pretreatment unit, a continuous ion exchange treatment unit, a tail liquid impurity removal unit, a tail liquid buffer tank, and a wastewater tank connected in sequence; the resin impurity removal device includes a backwashing unit, an acid washing unit, a water washing unit, and an alkaline washing unit for cleaning resin, which are respectively connected to the continuous ion exchange treatment unit; the output end of the waste liquid neutralization device is respectively connected to the pretreatment unit, the backwashing unit, the tail liquid impurity removal unit, and the wastewater tank.

[0104] The pretreatment unit is connected to the continuous ion exchange treatment unit and is used to input pretreated gas field water into the continuous ion exchange treatment unit for resin adsorption and lithium extraction. The first output of the continuous ion exchange treatment unit is used to output lithium-rich solution; the second output of the continuous ion exchange treatment unit is connected to the tail liquid buffer tank through the tail liquid impurity removal unit for temporary storage of lithium-lean solution after impurity removal; the third output of the continuous ion exchange treatment unit is connected to the waste liquid neutralization unit for neutralizing the waste liquid from resin cleaning; the outputs of the waste liquid neutralization unit and the tail liquid buffer tank are connected to a wastewater tank.

[0105] The other parts of this embodiment are the same as those of embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, or embodiment 6, and therefore will not be described again.

[0106] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An environmentally friendly resin impurity removal waste liquid neutralization device for neutralizing and treating waste liquid generated by cleaning resin, characterized in that, The inlet of the device is connected to a boron removal circulation branch with a boron removal wastewater tank (200) and a calcium and magnesium removal circulation branch with a calcium and magnesium removal wastewater tank (300) via a liquid inlet diverter (100); the boron removal circulation branch and the calcium and magnesium removal circulation branch are both pipelines with control valves, and the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected.

2. The device for neutralizing resin impurity waste liquid according to claim 1, characterized in that, The liquid inlet diverter (100) has at least one liquid inlet end and two liquid outlet ends; the liquid inlet diverter (100) is a multi-way valve, or the diverter is a multi-way control assembly consisting of a multi-way pipe joint and a valve.

3. The device for neutralizing resin impurity waste liquid according to claim 2, characterized in that, The multi-way valve is a three-way valve.

4. The device for neutralizing resin impurity waste liquid according to claim 1, characterized in that, Includes a first output pump (8), a second output pump (9), a first valve (1), a second valve (2), a third valve (3), a fifth valve (5), a sixth valve (6), a first tee connector (401), and a second tee connector (402); The boron removal wastewater tank (200), the first output pump (8), the first valve (1), the first three-way connector (401), the second valve (2), the second three-way connector (402), and the third valve (3) are sequentially arranged on the boron removal circulation branch to form a boron removal circuit; The calcium and magnesium removal wastewater tank (300), the second output pump (9), the sixth valve (6), the second three-way connector (402), the second valve (2), the first three-way connector (401), and the fifth valve (5) are sequentially arranged on the calcium and magnesium removal circulation branch to form a calcium and magnesium removal circuit; The pipeline connecting the first tee connector (401) and the second tee connector (402) and equipped with the second valve (2) is referred to as the common pipeline, and the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected through the common pipeline.

5. The environmentally friendly resin impurity removal waste liquid neutralization device according to claim 1, characterized in that, Includes a first output pump (8), a second output pump (9), a first valve (1), a second valve (2), a third valve (3), a fifth valve (5), a sixth valve (6), a seventh valve (7), a first tee connector (401), a second tee connector (402), and a third tee connector (403); The boron removal wastewater tank (200), the first output pump (8), the first valve (1), the first three-way connector (401), the second valve (2), the second three-way connector (402), and the third valve (3) are sequentially arranged on the boron removal circulation branch to form a boron removal circuit; The calcium and magnesium removal wastewater tank (300), the second output pump (9), the sixth valve (6), the third three-way connector (403), and the seventh valve (7) are sequentially arranged on the calcium and magnesium removal circulation branch to form a calcium and magnesium removal circuit; The first three-way connector (401) is connected to the calcium and magnesium removal wastewater tank (300) through a first intermediate pipeline equipped with the fifth valve (5), and the second three-way connector (402) is connected to the third three-way connector (403) through a second intermediate pipeline; that is, the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected through the first intermediate pipeline and the second intermediate pipeline.

6. The environmentally friendly resin impurity removal waste liquid neutralization device according to claim 1, characterized in that, Includes a first output pump (8), a second output pump (9), a first valve (1), a second valve (2), a third valve (3), a fifth valve (5), a sixth valve (6), a seventh valve (7), a first tee connector (401), a second tee connector (402), a third tee connector (403), and a fourth tee connector (404); The boron removal wastewater tank (200), the first output pump (8), the first valve (1), the first three-way connector (401), the second valve (2), the second three-way connector (402), and the third valve (3) are sequentially arranged on the boron removal circulation branch to form a boron removal circuit; The calcium and magnesium removal wastewater tank (300), the second output pump (9), the sixth valve (6), the third three-way connector (403), the seventh valve (7), and the fourth three-way connector (404) are sequentially arranged on the calcium and magnesium removal circulation branch to form a calcium and magnesium removal circuit; The first tee connector (401) and the fourth tee connector (404) are connected through a third intermediate pipeline equipped with the fifth valve (5), and the second tee connector (402) and the third tee connector (403) are connected through a fourth intermediate pipeline; that is, the boron removal circulation branch and the calcium and magnesium removal circulation branch are interconnected through the third intermediate pipeline and the fourth intermediate pipeline.

7. An environmentally friendly resin impurity removal waste liquid neutralization device according to claim 4, 5, or 6, characterized in that, It also includes a liquid alkali injection device for providing alkali solution and a mixer (500) installed on the boron removal circulation branch; the liquid alkali injection device is connected to the inlet end of the mixer (500), and the mixer (500) is installed between the first output pump (8) and the first tee connector (401).

8. An environmentally friendly resin impurity removal waste liquid neutralization device according to claim 4, 5, or 6, characterized in that, The tail liquid output end of the first output pump (8) and the tail liquid output end of the second output pump (9) are respectively connected to the neutral liquid buffer tank (600); the neutral liquid buffer tank (600) is provided with a diversion pipe for introducing the neutral liquid into one or more devices in the tail liquid impurity removal unit, backwashing unit, pretreatment unit, and sewage tank.

9. A gas field water treatment system, comprising a resin adsorption lithium extraction device and a resin impurity removal device, characterized in that, It also includes the waste liquid neutralization device as described in claim 1; the resin impurity removal device is connected to the resin adsorption lithium extraction device and is used to clean the resin; the waste liquid neutralization device is connected to the resin impurity removal device and is used to neutralize the waste liquid generated from cleaning the resin.

10. A gas field water treatment system according to claim 9, characterized in that, The resin adsorption lithium extraction device includes a pretreatment unit, a continuous ion exchange treatment unit, a tail liquid impurity removal unit, a tail liquid buffer tank, and a wastewater tank connected in sequence; the resin impurity removal device includes a backwashing unit, an acid washing unit, a water washing unit, and an alkaline washing unit for cleaning resin, which are respectively connected to the continuous ion exchange treatment unit; the output end of the waste liquid neutralization device is respectively connected to the pretreatment unit, the backwashing unit, the tail liquid impurity removal unit, and the wastewater tank.

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