Condensate discharge pipeline structure of acetic anhydride

Abstract

The utility model provides an acetic anhydride condensate discharge pipeline structure, which relates to the technical field of condensate discharge for acetic anhydride production, and comprises a main pipeline, a first acetic anhydride condensate discharge pipeline and a second acetic anhydride condensate discharge pipeline, a first valve is arranged on the first acetic anhydride condensate discharge pipeline, and a second valve is arranged on the second acetic anhydride condensate discharge pipeline. A second valve is arranged on the second acetic anhydride condensate discharge pipeline; one end of the main pipeline is communicated with the thermal power plant; according to the device, independent and regular sampling detection can be carried out in the long-time conveying process of condensate generated by two workshops, if the condensate is qualified, the condensate can be mixed and conveyed to a thermal power plant to be circularly processed, and if one of the condensate is unqualified, the condensate is independently discharged into a corresponding trench; and the situation that unqualified condensate and qualified condensate are mixed to influence the subsequent conveying process is avoided, if the condensate and the qualified condensate are both unqualified, the condensate is independently discharged into the corresponding trench and is not circularly processed, the process of the liquid discharging pipeline is optimized, and the using effect is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of condensate discharge for acetic anhydride production, and more specifically, to a condensate discharge pipeline structure for acetic anhydride. Background Technique

[0002] During the production process of acetic anhydride, a large amount of condensate is generated (mainly condensate 1 from the cracking workshop and condensate 2 from the carbonylation workshop). Currently, these condensates need to be jointly collected into the main pipeline and centrally discharged to the thermal power plant for processing and then recycled.

[0003] However, during the continuous transportation of the condensate, there will be a situation where the quality of the condensate is unqualified for a certain period of time, and thus regular sampling inspections are required. Unqualified condensate mainly refers to abnormal parameters such as pH value, silicon dioxide, and COD. However, once one or both of condensate 1 or condensate 2 are unqualified in the sampling inspection, the existing discharge pipeline cannot achieve the independent discharge of the unqualified condensate, and once the two condensates are mixed, they cannot be effectively separated, thus affecting the normal development of the entire discharge process. The use effect and design process of the acetic anhydride condensate discharge pipeline need to be further optimized. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems raised in the above background technique, and then a condensate discharge pipeline structure for acetic anhydride is proposed.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A condensate discharge pipeline structure for acetic anhydride includes a main pipeline, a first acetic anhydride condensate discharge pipeline, and a second acetic anhydride condensate discharge pipeline. A first valve is provided on the first acetic anhydride condensate discharge pipeline, and a second valve is provided on the second acetic anhydride condensate discharge pipeline. One end of the main pipeline is connected to the thermal power plant. A main road valve and a first sampling component are provided on the main pipeline, and the main pipeline is respectively connected to the first acetic anhydride condensate discharge pipeline, the first trench pipeline, and the second trench pipeline. The second acetic anhydride condensate discharge pipeline is connected to a circulation pipeline, and a second sampling component is provided on the second acetic anhydride condensate discharge pipeline. A third valve is provided on the circulation pipeline, and the circulation pipeline is connected to the main pipeline. A fourth valve is provided on the first trench pipeline, and a fifth valve is provided on the second trench pipeline. A branch pipeline connected to the second trench pipeline is provided on the circulation pipeline.

[0007] During the long - term transportation of the condensate generated in two workshops, this device can conduct independent and regular sampling inspections. If it is qualified, it can be mixed and then transported to the thermal power plant for recycling processing. If one is unqualified, it is discharged separately into the corresponding trench to avoid the unqualified condensate mixing with the qualified condensate and affecting the subsequent transportation process. If both are unqualified, they are independently discharged into the corresponding trench without recycling processing, optimizing the drainage pipeline process and significantly improving the usage effect.

[0008] Further, the first sampling component includes a first sampling pipe and a first solenoid valve. The first sampling pipe is arranged on the main pipeline between the main pipeline valve and the first valve, and the first solenoid valve is arranged on the first sampling pipe.

[0009] The above - mentioned solution realizes the regular sampling process of acetic anhydride 1 condensate through the first sampling component.

[0010] Further, the second sampling component includes a second sampling pipe and a second solenoid valve. The second sampling pipe is arranged on the second acetic anhydride condensate discharge pipeline between the second valve and the third valve, and the second solenoid valve is arranged on the second sampling pipe.

[0011] The above - mentioned solution realizes the regular sampling process of acetic anhydride 2 condensate through the second sampling component.

[0012] Further, the main pipeline valve adopts a DN300 valve.

[0013] Further, the third valves all adopt DN100 valves.

[0014] Further, the fourth and fifth valves adopt DN100 drain valves.

[0015] Further, a pressure gauge is arranged on the main pipeline.

[0016] Through the pressure gauge in the above - mentioned solution, the impact pressure value of the condensate on the main pipeline can be detected in real - time, thereby reducing the probability of damage to the main pipeline caused by excessive water flow pressure.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] Compared with the prior art, during the long - term transportation of the condensate generated in two workshops, this device can conduct independent and regular sampling inspections. If it is qualified, it can be mixed and then transported to the thermal power plant for recycling processing. If one is unqualified, it is discharged separately into the corresponding trench to avoid the unqualified condensate mixing with the qualified condensate and affecting the subsequent transportation process. If both are unqualified, they are independently discharged into the corresponding trench without recycling processing, optimizing the drainage pipeline process and significantly improving the usage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the installation schematic diagram of the first sampling pipe;

[0021] Figure 3 is the installation schematic diagram of the second sampling pipe;

[0022] Reference numerals:

[0023] 1, main pipeline; 11, main pipeline valve; 12, first sampling pipe; 13, first solenoid valve; 2, first acetic anhydride condensate discharge pipeline; 21, first valve; 3, second acetic anhydride condensate discharge pipeline; 31, second valve; 32, second sampling pipe; 33, second solenoid valve; 4, circulation pipeline; 41, third valve; 5, first trench pipeline; 51, fourth valve; 6, second trench pipeline; 61, fifth valve; 7, branch pipeline. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. The present utility model will be further described in conjunction with the accompanying drawings and embodiments:

[0025] As Figures 1 to 3 shown, a condensate discharge pipeline structure for acetic anhydride includes a main pipeline 1, a first acetic anhydride condensate discharge pipeline 2, and a second acetic anhydride condensate discharge pipeline 3. A first valve 21 is provided on the first acetic anhydride condensate discharge pipeline 2, and a second valve 31 is provided on the second acetic anhydride condensate discharge pipeline 3. One end of the main pipeline 1 is connected to a thermal power plant. A main pipeline valve 11 (the main pipeline valve 11 adopts a DN300 valve) and a first sampling assembly are provided on the main pipeline 1, and the main pipeline 1 is respectively connected to the first acetic anhydride condensate discharge pipeline 2, the first trench pipeline 5, and the second trench pipeline 6. The second acetic anhydride condensate discharge pipeline 3 is connected to the circulation pipeline 4, and a second sampling assembly is provided on the second acetic anhydride condensate discharge pipeline 3. A third valve 41 (the third valve 41 all adopts a DN100 valve) is provided on the circulation pipeline 4, and the circulation pipeline 4 is connected to the main pipeline 1. A fourth valve 51 is provided on the first trench pipeline 5, and a fifth valve 61 (the fourth valve 51 and the fifth valve 61 adopt DN100 drain valves) is provided on the second trench pipeline 6. A branch pipeline 7 communicating with the second trench pipeline 6 is provided on the circulation pipeline 4.

[0026] Further refinement of the solution of the embodiment of the present utility model is as follows Figure 2 As shown in the figure, the first sampling assembly includes a first sampling pipe 12 and a first solenoid valve 13. A first sampling pipe 12 is provided on the main pipeline 1 between the main pipeline valve 11 and the first valve 21, and a first solenoid valve 13 is provided on the first sampling pipe 12.

[0027] Further refinement of the solution of the embodiment of the present utility model is as follows Figure 3 As shown in the figure, the second sampling assembly includes a second sampling pipe 32 and a second solenoid valve 33. A second sampling pipe 32 is provided on the second acetic anhydride condensate discharge pipeline 3 between the second valve 31 and the third valve 41, and a second solenoid valve 33 is provided on the second sampling pipe 32.

[0028] It should be noted that the first valve 21, the second valve 31, the main pipeline valve 11, the third valve 41, the fourth valve 51, the fifth valve 61, the first solenoid valve 13 and the second solenoid valve 33 are all electrically connected to the controller, and the controller is not shown in the figure.

[0029] The working process of the present utility model:

[0030] First, the controller controls the opening of the first valve 21 and the second valve 31. Then, the acetic anhydride 1 condensate and the acetic anhydride 2 condensate can be injected into the main pipeline 1 and the circulation pipeline 4 respectively. Then, the sampling of the acetic anhydride 1 condensate is carried out through the short opening and closing of the first solenoid valve 13 on the main pipeline 1, and the sampling of the acetic anhydride 2 condensate is carried out through the short opening and closing of the second solenoid valve 33 on the circulation pipeline 4. Then, the sample parameters after sampling are immediately detected (the detection equipment can adopt the existing technology and will not be described in detail in this application). After the detection is completed, there are the following four discharge situations:

[0031] (1) If the detections of both acetic anhydride condensates are qualified, at this time, the main pipeline valve 11 and the third valve 41 are both opened, and the fourth valve 51 and the fifth valve 61 are both closed. Then, the two condensates are mixed and transported to the thermal power plant for subsequent processing and recycling;

[0032] (2) If the acetic anhydride 1 condensate is normal and the acetic anhydride 2 condensate is abnormal, at this time, the main pipeline valve 11 and the fifth valve 61 are opened, and the third valve 41 and the fourth valve 51 are closed. Then, the acetic anhydride 1 condensate is transported to the thermal power plant, and the acetic anhydride 2 condensate goes through the branch pipeline 7 and is finally discharged into the second trench pipeline 6;

[0033] (3) If the acetic anhydride 1 condensate is abnormal and the acetic anhydride 2 condensate is normal, at this time, the fourth valve 51 and the third valve 41 are opened, and the main pipeline valve 11 and the fifth valve 61 are closed. Then, the acetic anhydride 2 condensate is transported to the thermal power plant, and the acetic anhydride 1 condensate is directly discharged into the first trench pipeline 5;

[0034] (4) If the detection of both acetic anhydride condensate liquids fails, the fourth valve 51 and the fifth valve 61 are opened at this time, and the main path valve 11 and the third valve 41 are closed. At this time, the acetic anhydride 1 condensate liquid is directly discharged into the first trench pipeline 5, and the acetic anhydride 2 condensate liquid flows through the branch pipeline 7 and is finally discharged into the second trench pipeline 6, and neither is transported to the thermal power plant;

[0035] In summary, the condensate liquid sampling and detection process is carried out once every 3-4 hours. If the sampling is qualified, wait for the next round of sampling. If the sampling is unqualified, immediately stop the transportation work of the corresponding condensate liquid;

[0036] Compared with the prior art, during the long-term transportation of the condensate liquids generated in the two workshops, this device can conduct independent and regular sampling and detection. If qualified, they can be mixed and transported to the thermal power plant for cyclic processing. If one is unqualified, it is discharged separately into the corresponding trench to avoid the unqualified condensate liquid mixing with the qualified condensate liquid and affecting the subsequent transportation process. If both are unqualified, they are independently discharged into the corresponding trench without cyclic processing, optimizing the drainage pipeline process and significantly improving the use effect.

[0037] In some embodiments, a pressure gauge is provided on the main pipeline 1, and the pressure gauge is not shown in the figure; in this embodiment, the impact pressure value of the condensate liquid on the main pipeline 1 can be detected in real time through the pressure gauge, thereby reducing the probability of damage to the main pipeline 1 caused by excessive water flow pressure.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A condensate discharge pipeline structure for acetic anhydride, comprising a main pipeline (1), a first acetic anhydride condensate discharge pipeline (2) and a second acetic anhydride condensate discharge pipeline (3), wherein the first acetic anhydride condensate discharge pipeline (2) is provided with a first valve (21), the second acetic anhydride condensate discharge pipeline (3) is provided with a second valve (31), one end of the main pipeline (1) is connected to a thermal power plant, and characterized in that: The main pipeline (1) is provided with a main pipeline valve (11) and a first sampling assembly, and the main pipeline (1) is respectively connected to a first acetic anhydride condensate discharge pipeline (2), a first trench pipeline (5) and a second trench pipeline (6); the second acetic anhydride condensate discharge pipeline (3) is connected to a circulation pipeline (4), and a second sampling assembly is provided on the second acetic anhydride condensate discharge pipeline (3); a third valve (41) is provided on the circulation pipeline (4), and the circulation pipeline (4) is connected to the main pipeline (1); a fourth valve (51) is provided on the first trench pipeline (5), a fifth valve (61) is provided on the second trench pipeline (6), and a branch pipeline (7) connected to the second trench pipeline (6) is provided on the circulation pipeline (4).

2. The condensate discharge pipeline structure of acetic anhydride according to claim 1, characterized in that: The first sampling assembly comprises a first sampling tube (12) and a first solenoid valve (13); the main line (1) is provided with the first sampling tube (12) between the main line valve (11) and the first valve (21); and the first solenoid valve (13) is provided on the first sampling tube (12).

3. The condensate discharge pipeline structure of acetic anhydride according to claim 1, characterized in that: The second sampling assembly comprises a second sampling tube (32) and a second solenoid valve (33); the second acetic anhydride condensate discharge pipeline (3) is provided with a second sampling tube (32) between the second valve (31) and the third valve (41); and the second solenoid valve (33) is provided on the second sampling tube (32).

4. The condensate discharge pipeline structure of acetic anhydride according to claim 1, characterized in that: The main valve (11) is a DN300 valve.

5. The condensate discharge pipeline structure of acetic anhydride according to claim 1, characterized in that: The third valve (41) is a DN100 valve.

6. The condensate discharge pipeline structure of acetic anhydride according to claim 1, characterized in that: The fourth valve (51) and the fifth valve (61) are both DN100 shower valves.

7. The condensate discharge pipeline structure of acetic anhydride according to claim 1, characterized in that: The main pipe (1) is provided with a pressure gauge.

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