A high-salinity wastewater treatment system

Abstract

The utility model discloses a kind of high-salinity wastewater treatment systems, including carbonation tower, cold analysis equipment and permeation equipment;The liquid outlet of carbonation tower is connected with circulating pump, circulating pump is communicated with cold analysis equipment by liquid supply pipe;Permeation equipment is communicated with high-salinity wastewater inlet pipe and concentrated high-salinity water discharge pipe, concentrated high-salinity water discharge pipe is communicated with carbonation tower inlet, circulating pump is also communicated with concentrated high-salinity water discharge pipe by reflux pipeline two, cold analysis equipment is communicated with high-salinity wastewater inlet pipe by reflux pipeline one.The utility model uses effect is good, high-salinity wastewater is filtered by permeation equipment, salt is effectively intercepted, low-salinity wastewater is discharged after processing, and another part of concentrated high-salinity water enters into carbonation tower, ammonia water can absorb carbon dioxide to generate sodium bicarbonate and other substances in the environment of high concentration salt and produce crystallization, and recovery salt component, can realize the dual goal of maximization utilization of resources and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a high-salinity wastewater treatment system. Background Technology

[0002] In my country's socio-economic development and urbanization process, water scarcity is gradually becoming one of the main factors restricting the country's sustainable development strategy. In recent years, with the continuous expansion of my country's industrial scale, industrial water consumption has surged. Simultaneously, the amount of wastewater generated has also increased rapidly, posing a significant challenge to current wastewater treatment and recycling technologies. Direct discharge of industrial wastewater will cause serious pollution to the surrounding soil and water environment. Even after treatment and meeting standards, failure to recycle wastewater leads to water waste and exacerbates water shortages.

[0003] High-salinity wastewater not only contains many high concentrations of organic pollutants, but also a large amount of calcium, sodium, chloride, sulfate and other ions. Existing high-salinity wastewater treatment systems mainly consist of sedimentation tanks, filtration devices and crystallization devices. Although they can treat high-salinity wastewater and reduce the pollution of waste to the environment to a certain extent, they have the problem that the recovered materials (mainly crystals) are a mixture formed by acids, alkalis and salts, which are difficult to reuse and do not meet the requirements of resource conservation. Therefore, a high-salinity wastewater treatment system is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-salt wastewater treatment system with good performance. The high-salt wastewater is filtered through a permeation device and discharged, while the concentrated high-salt water enters a carbonation tower. In the high-salt environment, ammonia water can absorb carbon dioxide to generate substances such as sodium bicarbonate and crystallize, thus recovering salt components. This can achieve the dual goals of maximizing resource utilization and environmental protection, and can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-salt wastewater treatment system, comprising a carbonation tower, a cold precipitator, and a permeation device; the outlet of the carbonation tower is connected to a circulation pump, which is connected to the cold precipitator via a supply pipe; the permeation device is connected to a high-salt wastewater inlet pipe and a concentrated high-salt water outlet pipe, the concentrated high-salt water outlet pipe is connected to the inlet of the carbonation tower, the circulation pump is also connected to the concentrated high-salt water outlet pipe via a second reflux pipe, and the cold precipitator is connected to the high-salt wastewater inlet pipe via a first reflux pipe.

[0006] Preferably, the high-salinity wastewater inlet pipe is also connected to a booster for pressurizing the high-salinity wastewater.

[0007] Preferably, the carbonation tower is also connected to an inlet pipe, through which waste ammonia and carbon dioxide enter the carbonation tower for reaction.

[0008] Preferably, the cold precipitation equipment is a cold precipitation crystallizer, used for the alkaline solution after the crystallization reaction, and the mother liquor is returned to the permeation equipment through a reflux pipeline.

[0009] Preferably, the permeation equipment uses a reverse osmosis membrane to remove salt from high-salinity wastewater and increase the salinity of the high-salinity wastewater.

[0010] Preferably, the concentrated high-salt water discharge pipe, the liquid supply pipe, the high-salt wastewater inlet pipe, the return pipe one, and the return pipe two are all equipped with gate valves and solenoid valves.

[0011] Compared with the prior art, the beneficial effects of this utility model are: after the high-salt wastewater is filtered through the permeation equipment and discharged, the concentrated high-salt water enters the carbonation tower. In the high-salt environment, ammonia water can absorb carbon dioxide to generate substances such as sodium bicarbonate and crystallize, thus recovering salt components. This can achieve the dual goals of maximizing resource utilization and protecting the environment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system of this utility model.

[0013] In the diagram: 1 Carbonation tower, 2 Concentrated high-salt water discharge pipe, 3 Air inlet pipe, 4 Circulation pump, 5 Liquid supply pipe, 6 Cold precipitation equipment, 7 Return pipeline one, 8 Booster, 9 High-salt wastewater inlet pipe, 10 Permeation equipment, 11 Return pipeline two. Detailed Implementation

[0014] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0015] Please see Figure 1 The present invention provides the following technical solution: Example 1: A high-salinity wastewater treatment system includes a carbonation tower 1, a cold precipitation device 6, and a permeation device 10; the outlet of the carbonation tower 1 is connected to a circulation pump 4, which is connected to the cold precipitation device 6 via a supply pipe 5; the permeation device 10 is connected to a high-salinity wastewater inlet pipe 9 and a concentrated high-salinity brine outlet pipe 2, which is connected to the inlet of the carbonation tower 1; the cold precipitation device 6 is connected to the high-salinity wastewater inlet pipe 9 via a return pipe 7; the carbonation tower 1 is also connected to an inlet pipe 3, through which waste ammonia and carbon dioxide enter the carbonation tower 1 for reaction; It is understandable that after high-salt wastewater is filtered through the permeation device 10, part of it becomes low-salt wastewater and is discharged, while part becomes concentrated high-salt water and enters the carbonation tower 1. In the high-salt environment, ammonia water can absorb carbon dioxide to generate substances such as sodium bicarbonate, which then enter the cold precipitation device 6 for concentration and crystallization to recover salt components. This can achieve the dual goals of maximizing resource utilization and protecting the environment. It should be noted that the cold precipitation equipment 6 is a cold precipitation crystallizer used to crystallize and concentrate the alkali solution. The mother liquor is returned to the permeation equipment 10 through the return pipeline 7. Crystallized substances are precipitated, and the mother liquor is returned to the permeation equipment 10 to participate in the circulation treatment again, achieving a high-efficiency treatment effect. The permeation equipment 10 uses a reverse osmosis membrane to remove salt from the high-salinity wastewater and increase the salinity of the high-salinity wastewater. The increase in salinity is also conducive to the alkali production reaction. The high-salinity wastewater is separated into two parts: one part is high-salinity wastewater with a significantly increased salinity, and the other part is low-salinity wastewater. Furthermore, the circulating pump 4 is also connected to the concentrated high brine discharge pipe 2 through the return pipeline 11, so that the alkaline solution is pumped back into the carbonation tower 1 for circulation, thereby achieving the crystallization concentration required by the cold precipitation equipment 6.

[0016] Example 2: Unlike Example 1, the high-salinity wastewater inlet pipe 9 is also connected to a booster 8 that pressurizes the high-salinity wastewater. By applying pressure, the high-salinity wastewater passes through the permeation device 10 and the salt is intercepted, thereby efficiently removing salt (sodium chloride, calcium chloride, etc.) from the water, realizing the recovery of fresh water, and at the same time increasing the salinity of the high-salinity wastewater, making it easier to enter the carbonation tower 1 for better reaction.

[0017] Example 3: Unlike Example 1, the concentrated high saline discharge pipe 2, the liquid supply pipe 5, the high saline wastewater inlet pipe 9, the return pipe 1 7, and the return pipe 2 11 are all equipped with gate valves and solenoid valves to facilitate the control of the relevant pipelines.

[0018] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A high-salinity wastewater treatment system, characterized in that: It includes a carbonation tower (1), a cold precipitator (6), and a permeation device (10); the outlet of the carbonation tower (1) is connected to a circulation pump (4), and the circulation pump (4) is connected to the cold precipitator (6) through a supply pipe (5); the permeation device (10) is connected to a high-salt wastewater inlet pipe (9) and a concentrated high-salt water outlet pipe (2), the concentrated high-salt water outlet pipe (2) is connected to the inlet of the carbonation tower (1), the circulation pump (4) is also connected to the concentrated high-salt water outlet pipe (2) through a second reflux pipe (11), and the cold precipitator (6) is connected to the high-salt wastewater inlet pipe (9) through a first reflux pipe (7).

2. The high-salinity wastewater treatment system according to claim 1, characterized in that: The high-salt wastewater inlet pipe (9) is also connected to a booster (8) for pressurizing the high-salt wastewater.

3. The high-salinity wastewater treatment system according to claim 1, characterized in that: The carbonation tower (1) is also connected to an inlet pipe (3), through which waste ammonia and carbon dioxide enter the carbonation tower (1) for reaction.

4. The high-salinity wastewater treatment system according to claim 1, characterized in that: The cold precipitation equipment (6) is a cold precipitation crystallizer used to crystallize the alkaline solution after the crystallization reaction. The low salinity mother liquor formed after crystallization is returned to the permeation equipment (10) through the return pipeline (7).

5. A high-salinity wastewater treatment system according to claim 1, characterized in that: The permeation device (10) uses a reverse osmosis membrane to remove salt from high-salt wastewater and increase the salinity of the high-salt wastewater.

6. The high-salinity wastewater treatment system according to claim 1, characterized in that: The concentrated high-salt water discharge pipe (2), the liquid supply pipe (5), the high-salt wastewater inlet pipe (9), the return pipe one (7), and the return pipe two (11) are all equipped with gate valves and solenoid valves.

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