High-salinity sewage treatment device

Abstract

The utility model relates to the technical field of chemical engineering devices, and discloses a high-salt sewage treatment device which comprises a sewage conveying unit, a buffer unit and a neutralization reaction unit which are communicated in sequence, the sewage conveying unit comprises a first quenching settling tank, a first sewage heat exchanger and a first conveying pipeline for conveying high-salt sewage generated by the first quenching settling tank to the first sewage heat exchanger; the buffer unit comprises a first buffer tank and a second buffer tank, and the first buffer tank and the second buffer tank are connected between the first sewage heat exchanger and the neutralization reaction unit in parallel. The utility model has the following technical effects: the first buffer tank and the second buffer tank are connected in parallel between the first sewage heat exchanger and the neutralization reaction unit, so that the salt deposition accumulation of the pipeline can be effectively reduced, the pipeline blockage is relieved, and the maintenance cost is reduced; meanwhile, the sewage treatment cost of the neutralization reaction unit is also obviously reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and in particular relates to a high-salt sewage treatment device. Background Art

[0002] As an important separation equipment, the quenching sedimentation tank plays an important role in the resin production process. It mainly separates the solid-liquid mixture by gravity sedimentation. During the use of the quenching sedimentation tank, a large amount of high-salt wastewater will be generated. Therefore, the high-salt wastewater generated by the quenching sedimentation tank needs to be treated before discharge to avoid pollution to the ecological environment.

[0003] Since the high-salinity sewage discharged from the quenching sedimentation tank has a high temperature, it is necessary to cool the high-salinity sewage before treatment. In the prior art, a heat exchanger is set at the high-salinity sewage discharge port of the quenching sedimentation tank to cool the high-salinity sewage, and then the high-salinity sewage is transported to the buffer tank and the second heat exchanger in sequence, and finally transported to the sewage treatment pool for treatment. Since a large amount of salt precipitation will be generated in the high-salinity sewage after the cooling treatment, it is easy to cause the transportation pipeline to be blocked when it is treated by the existing treatment device, which has high maintenance costs and increases the treatment cost of the sewage treatment pool. Utility Model Content

[0004] In order to solve the shortcomings of the prior art, the utility model provides a high-salt sewage treatment device, which can effectively reduce the salt precipitation accumulation in the pipeline, alleviate pipeline blockage, and reduce maintenance costs by connecting a first buffer tank and a second buffer tank in parallel between a first sewage heat exchanger and a neutralization reaction unit; at the same time, it can also reduce the sewage treatment cost of the neutralization reaction unit.

[0005] The technical effects to be achieved by the utility model are achieved through the following technical aspects:

[0006] The utility model provides a high-salt sewage treatment device, comprising a sewage conveying unit, a buffer unit and a neutralization reaction unit which are connected in sequence;

[0007] The sewage conveying unit comprises a first quenching sedimentation tank, a first sewage heat exchanger and a first conveying pipeline for conveying the high-salinity sewage generated in the first quenching sedimentation tank to the first sewage heat exchanger;

[0008] The buffer unit includes a first buffer tank and a second buffer tank, and the first buffer tank and the second buffer tank are connected in parallel between the first sewage heat exchanger and the neutralization reaction unit.

[0009] As a further description of the technical solution of the utility model, the sewage conveying unit also includes a second quenching sedimentation tank, a second sewage heat exchanger and a second conveying pipeline for conveying the high-salt sewage produced by the second quenching sedimentation tank to the second sewage heat exchanger, and the output end of the second sewage heat exchanger is connected to the first buffer tank and the second buffer tank.

[0010] As a further description of the technical solution of the utility model, a first communicating pipeline is connected between the first conveying pipeline and the second conveying pipeline, and a first control valve is arranged on the first communicating pipeline.

[0011] As a further description of the technical solution of the utility model, the output end of the first sewage heat exchanger is connected to a third delivery pipe, and the end of the third delivery pipe is provided with a first branch pipe and a second branch pipe, and the first branch pipe and the second branch pipe are respectively connected to the first buffer tank and the second buffer tank.

[0012] As a further description of the technical solution of the utility model, the output end of the second sewage heat exchanger is connected to a fourth delivery pipe, and the end of the fourth delivery pipe is provided with a third branch pipe and a fourth branch pipe, and the third branch pipe and the fourth branch pipe are respectively connected to the first buffer tank and the second buffer tank.

[0013] As a further description of the technical solution of the utility model, a second connecting pipeline is connected between the third conveying pipeline and the fourth conveying pipeline, and a second control valve is arranged on the second connecting pipeline.

[0014] As a further description of the technical solution of the utility model, the sewage conveying unit also includes a third rapid cooling sedimentation tank and a fifth conveying pipeline, and the third rapid cooling sedimentation tank is connected to the second conveying pipeline through the fifth conveying pipeline.

[0015] As a further description of the technical solution of the utility model, a first regulating valve is provided on the fifth delivery pipeline.

[0016] As a further description of the technical solution of the utility model, the first delivery pipeline and the second delivery pipeline are respectively provided with a second regulating valve and a third regulating valve.

[0017] As a further description of the technical solution of the utility model, the output end of the first sewage heat exchanger is connected to an oil-water separation tank, and the output end of the oil-water separation tank is connected to a first buffer tank and a second buffer tank.

[0018] In summary, the utility model has at least the following benefits:

[0019] 1. The high-salt sewage treatment device provided by the utility model can divert the high-salt sewage output by the first sewage heat exchanger and then merge it into the neutralization reaction unit for neutralization reaction treatment by connecting the first buffer tank and the second buffer tank in parallel between the first sewage heat exchanger and the neutralization reaction unit, thereby reducing the accumulation of salt precipitation, effectively alleviating the blockage of the transportation pipeline, and reducing the maintenance cost of the transportation pipeline.

[0020] 2. The high-salt sewage treatment device provided by the utility model, wherein the first buffer tank and the second buffer tank both have neutralization and buffering functions, and can perform preliminary neutralization on the high-salt sewage. Since the high-salt sewage output from the first sewage heat exchanger is divided into two streams and passes through the first buffer tank and the second buffer tank respectively, the preliminary neutralization effect of the high-salt sewage can be made better and more sufficient. In addition, the reduction of salt precipitation accumulation in the conveying pipeline significantly reduces the processing cost of the neutralization reaction unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a high-salt sewage treatment device according to Example 1 of the utility model;

[0022] Figure 2 This is a schematic structural diagram of a high-salt sewage treatment device according to Embodiment 2 of the present utility model;

[0023] Figure 3 This is a schematic structural diagram of a high-salt sewage treatment device according to Example 3 of the utility model.

[0024] Markings in the figure:

[0025] 1. Sewage transport unit; 11. First quenching sedimentation tank; 12. First sewage heat exchanger; 13. Second quenching sedimentation tank; 14. Second sewage heat exchanger; 15. Third quenching sedimentation tank; 16. Oil-water separation tank;

[0026] 2. Buffer unit; 21. First buffer tank; 22. Second buffer tank;

[0027] 3. Neutralization reaction unit;

[0028] A1, first delivery pipeline; A2, second delivery pipeline; A3, third delivery pipeline; A4, first branch pipeline; A5, second branch pipeline; A6, fourth delivery pipeline; A7, third branch pipeline; A8, fourth branch pipeline; A9, fifth delivery pipeline;

[0029] B1, first communicating pipe; B2, second communicating pipe;

[0030] C1, first control valve; C2, second control valve;

[0031] D1, first regulating valve; D2, second regulating valve; D3, third regulating valve. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] refer to Figure 1 The high-salinity sewage treatment device provided in this embodiment includes a sewage conveying unit 1, a buffer unit 2 and a neutralization reaction unit 3 which are connected in sequence. In some embodiments, the neutralization reaction unit 3 is a neutralization reaction tank for adjusting the pH of the high-salinity sewage.

[0036] Specifically, the sewage conveying unit 1 includes a first quenching sedimentation tank 11, a first sewage heat exchanger 12, and a first conveying pipeline A1 for conveying the high-salinity sewage generated by the first quenching sedimentation tank 11 to the first sewage heat exchanger 12. The first sewage heat exchanger 12 is used to cool the high-salinity sewage generated by the first quenching sedimentation tank 11. In some embodiments, the cold source of the first sewage heat exchanger 12 can come from an external cold source, such as a low-temperature water cycle or a refrigeration device. In other embodiments, the cold source of the first sewage heat exchanger 12 can also come from an internal cold source, such as a low-temperature material in an upstream production system or a downstream production system.

[0037] Specifically, the buffer unit 2 includes a first buffer tank 21 and a second buffer tank 22, which are connected in parallel between the first sewage heat exchanger 12 and the neutralization reaction unit 3. It can be understood that the output end of the first sewage heat exchanger 12 is connected to the first buffer tank 21 and the second buffer tank 22, and the output ends of the first buffer tank 21 and the second buffer tank 22 are both connected to the neutralization reaction unit 3. By setting the first buffer tank 21 and the second buffer tank 22 connected in parallel, the high-salinity sewage output by the first sewage heat exchanger 12 can be diverted, so that the high-salinity sewage is divided into two streams and transported to the neutralization reaction unit 3 via the first buffer tank 21 and the second buffer tank 22 respectively, thereby reducing the accumulation of salt precipitation in the conveying pipeline, effectively alleviating the phenomenon of conveying pipeline blockage, and reducing maintenance costs; at the same time, due to the reduction of salt precipitation accumulation in the conveying pipeline, the processing cost of the neutralization reaction unit 3 can be effectively reduced.

[0038] The first buffer tank 21 and the second buffer tank 22 both have neutralization and buffering functions, and can perform preliminary neutralization on the high-salinity sewage. In some embodiments, the first buffer tank 21 and the second buffer tank 22 can be buffer tanks with the same internal structure, or can be buffer tanks with different internal structures. Since the high-salinity sewage output from the first sewage heat exchanger 12 is divided into two streams and transported to the first buffer tank 21 and the second buffer tank 22 respectively, the preliminary neutralization effect of the high-salinity sewage can be better and more sufficient, which is conducive to reducing the neutralization reaction treatment cost of the neutralization reaction unit 3.

[0039] As a further optimization, the sewage conveying unit 1 further includes a second quenching sedimentation tank 13, a second sewage heat exchanger 14, and a second conveying pipeline A2 for conveying the high-salinity sewage generated by the second quenching sedimentation tank 13 to the second sewage heat exchanger 14, and the output end of the second sewage heat exchanger 14 is connected to the first buffer tank 21 and the second buffer tank 22. It can be understood that the high-salinity sewage generated by the second quenching sedimentation tank 13 is also divided into two streams and conveyed to the neutralization reaction unit 3 via the first buffer tank 21 and the second buffer tank 22 respectively.

[0040] In this embodiment, the first quenching sedimentation tank 11 produces acidic high-salinity sewage, and the second quenching sedimentation tank 13 produces alkaline high-salinity sewage. By simultaneously conveying the acidic high-salinity sewage and the alkaline high-salinity sewage to the first buffer tank 21 and the second buffer tank 22, the acidic high-salinity sewage and the alkaline high-salinity sewage can be fully mixed before treatment, thereby playing a role in acid-base neutralization to a certain extent, which is also conducive to further reducing the neutralization reaction treatment cost of the neutralization reaction unit 3.

[0041] As a further optimization, a first connecting pipe B1 is connected between the first delivery pipe A1 and the second delivery pipe A2, and a first control valve C1 is arranged on the first connecting pipe B1. It should be noted that the first connecting pipe B1 is used as a backup delivery pipe only in an emergency or when an abnormality occurs in the treatment device. When not in use, the first control valve C1 is closed; when in use, the first control valve C1 is opened. The first connecting pipe B1 and the first control valve C1 are arranged so that when an abnormality occurs in the first sewage heat exchanger 12, the high-salinity sewage of the first quenching sedimentation tank 11 can be promptly transported to the second sewage heat exchanger 14, or when an abnormality occurs in the second sewage heat exchanger 14, the high-salinity sewage of the second quenching sedimentation tank 13 can be promptly transported to the first sewage heat exchanger 12, thereby ensuring the normal and stable operation of the treatment device and improving the safety of the treatment device.

[0042] The output end of the first sewage heat exchanger 12 is connected to the third delivery pipeline A3, and the end of the third delivery pipeline A3 is provided with a first branch pipeline A4 and a second branch pipeline A5, and the first branch pipeline A4 and the second branch pipeline A5 are respectively connected to the first buffer tank 21 and the second buffer tank 22. The output end of the second sewage heat exchanger 14 is connected to the fourth delivery pipeline A6, and the end of the fourth delivery pipeline A6 is provided with a third branch pipeline A7 and a fourth branch pipeline A8, and the third branch pipeline A7 and the fourth branch pipeline A8 are respectively connected to the first buffer tank 21 and the second buffer tank 22.

[0043] As a further optimization, a second connecting pipe B2 is connected between the third delivery pipe A3 and the fourth delivery pipe A6, and a second control valve C2 is provided on the second connecting pipe B2, and the second control valve C2 is used to control the connection or closure of the second connecting pipe B2. It should be noted that in the process of high-salinity sewage treatment, the second control valve C2 can be opened or closed according to the actual treatment needs. For example, when the pH difference between the high-salinity sewage produced by the first quenching sedimentation tank 11 and the high-salinity sewage produced by the second quenching sedimentation tank 13 is too large, the second control valve C2 can be opened to mix the high-salinity sewage output by the first sewage heat exchanger 12 and the high-salinity sewage output by the second sewage heat exchanger 14 in advance before entering the first buffer tank 21 and the second buffer tank 22, so as to achieve the effect of mutual neutralization, reduce the neutralization buffer pressure of the first buffer tank 21 and the second buffer tank 22, and also help to further reduce the treatment cost of the neutralization reaction unit 3.

[0044] The high-salt sewage treatment device of this embodiment reduces the salt precipitation accumulation in the pipeline, alleviates the pipeline blockage, reduces the maintenance cost, and at the same time reduces the sewage treatment cost of the neutralization reaction unit by setting the first buffer tank and the second buffer tank; by the simultaneous operation of the two sewage output routes of the first quenching sedimentation tank and the second quenching sedimentation tank, the treatment efficiency of high-salt sewage can be improved, and the safety of the treatment device can also be improved; by setting the second connecting pipe and the second control valve, the neutralization buffer pressure of the first buffer tank and the second buffer tank can be reduced, which is beneficial to reducing the treatment cost of the neutralization reaction unit.

[0045] Example 2

[0046] As a further optimization of Example 1, refer to Figure 2 The sewage conveying unit 1 further includes a third quenching sedimentation tank 15 and a fifth conveying pipeline A9. The third quenching sedimentation tank 15 is connected to the second conveying pipeline A2 through the fifth conveying pipeline A9. The fifth conveying pipeline A9 is provided with a first regulating valve D1, which is used to adjust the output rate of the high-salinity sewage of the third quenching sedimentation tank 15. If necessary, closing the first regulating valve D1 can block the discharge of the high-salinity sewage of the third quenching sedimentation tank 15.

[0047] It is understandable that the high-salt sewage produced by the third quenching sedimentation tank 15 first merges with the high-salt sewage of the second quenching sedimentation tank 13, and then enters the second sewage heat exchanger 14 together. By merging the two high-salt sewage in advance, the two high-salt sewage can exchange heat in advance, thereby reducing the energy consumption of the second sewage heat exchanger 14. It should be noted that the third quenching sedimentation tank 15 and the second quenching sedimentation tank 13 both produce alkaline high-salt sewage. By simultaneously treating the high-salt sewage produced by the second quenching sedimentation tank 13 and the third quenching sedimentation tank 15, it is beneficial to improve the treatment efficiency of high-salt sewage.

[0048] In some embodiments, the first quenching sedimentation tank 11 may also be connected in parallel with a fourth quenching sedimentation tank, and the connection relationship between the first quenching sedimentation tank 11 and the fourth quenching sedimentation tank is the same as the connection relationship between the second quenching sedimentation tank 13 and the third quenching sedimentation tank 15. The first quenching sedimentation tank 11 and the fourth quenching sedimentation tank both produce slightly acidic high-salt sewage, thereby improving the sewage treatment efficiency while reducing the energy consumption of the first sewage heat exchanger 12.

[0049] The first delivery pipeline A1 and the second delivery pipeline A2 are respectively provided with a second regulating valve D2 and a third regulating valve D3. The second regulating valve D2 is used to adjust the output rate of the high-salinity sewage from the first quenching sedimentation tank 11. When an emergency or safety accident occurs, the second regulating valve D2 can be closed to timely block the discharge of the high-salinity sewage in the first quenching sedimentation tank 11, thereby improving the safety of the treatment device. The effect of the third regulating valve D3 is the same as that of the second regulating valve D2, which will not be described in detail here.

[0050] The high-salt sewage treatment device of this embodiment, by providing a third rapid cooling sedimentation tank, can improve the high-salt sewage treatment efficiency while reducing the energy consumption of the second sewage heat exchanger and saving costs; by providing a first regulating valve, a second regulating valve and a third regulating valve, the safety of the treatment device can be improved and the risk of safety accidents can be reduced.

[0051] Example 3

[0052] As a further optimization of Example 2, refer to Figure 3 The output end of the first sewage heat exchanger 12 is connected to an oil-water separation tank 16, and the output end of the oil-water separation tank 16 is connected to a first buffer tank 21 and a second buffer tank 22. Since the high-salinity sewage discharged from the first quenching sedimentation tank 11 may still contain some oil substances in some cases, which may affect the treatment effect of the treatment device to a certain extent, the oil-water separation tank 16 is provided to separate oil and water from the high-salinity sewage by natural stratification, which can further improve the treatment efficiency of the treatment device and enhance the treatment effect.

[0053] In some embodiments, the output end of the second sewage heat exchanger 14 may also be connected to an oil-water separation tank, and the output end of the oil-water separation tank is connected to the first buffer tank 21 and the second buffer tank 22. This further improves the treatment efficiency of the treatment device and enhances the treatment effect.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0056] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A high-salt sewage treatment device, characterized in that: It comprises a sewage conveying unit (1), a buffer unit (2) and a neutralization reaction unit (3) which are connected in sequence; The sewage conveying unit (1) comprises a first quenching sedimentation tank (11), a first sewage heat exchanger (12), and a first conveying pipeline (A1) for conveying high-salinity sewage generated by the first quenching sedimentation tank (11) to the first sewage heat exchanger (12); The buffer unit (2) comprises a first buffer tank (21) and a second buffer tank (22), wherein the first buffer tank (21) and the second buffer tank (22) are connected in parallel between the first sewage heat exchanger (12) and the neutralization reaction unit (3).

2. The high-salt sewage treatment device according to claim 1, characterized in that: The sewage transport unit (1) further comprises a second rapid cooling sedimentation tank (13), a second sewage heat exchanger (14) and a second transport pipeline (A2) for transporting the high-salinity sewage generated by the second rapid cooling sedimentation tank (13) to the second sewage heat exchanger (14), and the output end of the second sewage heat exchanger (14) is connected to the first buffer tank (21) and the second buffer tank (22).

3. The high-salt sewage treatment device according to claim 2, characterized in that: A first communicating pipe (B1) is connected between the first conveying pipe (A1) and the second conveying pipe (A2), and a first control valve (C1) is arranged on the first communicating pipe (B1).

4. The high-salt sewage treatment device according to claim 2, characterized in that: The output end of the first sewage heat exchanger (12) is connected to a third delivery pipeline (A3), and a first branch pipeline (A4) and a second branch pipeline (A5) are provided at the end of the third delivery pipeline (A3), and the first branch pipeline (A4) and the second branch pipeline (A5) are respectively connected to the first buffer tank (21) and the second buffer tank (22).

5. The high-salt sewage treatment device according to claim 4, characterized in that: The output end of the second sewage heat exchanger (14) is connected to a fourth delivery pipeline (A6), and a third branch pipeline (A7) and a fourth branch pipeline (A8) are provided at the end of the fourth delivery pipeline (A6), and the third branch pipeline (A7) and the fourth branch pipeline (A8) are respectively connected to the first buffer tank (21) and the second buffer tank (22).

6. The high-salt sewage treatment device according to claim 5, characterized in that: A second communicating pipe (B2) is connected between the third conveying pipe (A3) and the fourth conveying pipe (A6), and a second control valve (C2) is provided on the second communicating pipe (B2).

7. The high-salt sewage treatment device according to claim 2, characterized in that: The sewage conveying unit (1) further comprises a third rapid cooling sedimentation tank (15) and a fifth conveying pipeline (A9), and the third rapid cooling sedimentation tank (15) is connected to the second conveying pipeline (A2) via the fifth conveying pipeline (A9).

8. The high-salt sewage treatment device according to claim 7, characterized in that: The fifth delivery pipeline (A9) is provided with a first regulating valve (D1).

9. The high-salt sewage treatment device according to claim 2, characterized in that: The first delivery pipeline (A1) and the second delivery pipeline (A2) are respectively provided with a second regulating valve (D2) and a third regulating valve (D3).

10. The high-salt sewage treatment device according to claim 1, characterized in that: The output end of the first sewage heat exchanger (12) is connected to an oil-water separation tank (16), and the output end of the oil-water separation tank (16) is connected to a first buffer tank (21) and a second buffer tank (22).

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