Recycling section first rectifying tower outlet liquid treatment device

Abstract

The embodiment of the utility model discloses a recycling section first rectifying tower kettle outlet liquid treatment device, and relates to a recycling system, the recycling section first rectifying tower kettle outlet liquid treatment device comprises a first rectifying tower, an input pipeline and a preheater, and the first rectifying tower is provided with a gas phase outlet, a liquid phase outlet and an inlet; the input pipeline is connected with the inlet, so that the input pipeline is communicated with the first rectifying tower; the preheater is arranged on the input pipeline, and the preheater is connected with a reboiler; wherein the input pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline are respectively connected with the third pipeline, the first pipeline is used for allowing first mother liquor to pass through, and the second pipeline is used for allowing second mother liquor to pass through; the high-alkali mother liquor and the low-alkali mother liquor are mixed and then fed into the rectifying tower for treatment, so that the device can efficiently recover sodium acetate in the mother liquor, and maximum utilization of resources is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a recycling system, especially in a recovery section one rectifying column kettle effluent treatment device. BACKGROUND

[0002] In the PVA original production process, the low-alkali mother liquor is sent to a rectifying column for feeding, and after rectification by the rectifying column, the distillate gas phase is fed to the rectifying column for feeding, and the kettle liquid is fed to a third rectifying column for feeding by a kettle liquid pump.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is publicly known. SUMMARY

[0004] The utility model provides a recovery section one rectifying column kettle effluent treatment device aiming at the deficiency of the above-mentioned original technology, which comprises:

[0005] A first rectifying column, which is provided with a gas phase outlet, a liquid phase outlet and an inlet;

[0006] An input pipeline, which is connected with the inlet so as to communicate the input pipeline with the first rectifying column;

[0007] A preheater, which is arranged on the input pipeline and is connected with a reboiler;

[0008] The input pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline are respectively connected with the third pipeline, the first pipeline is used for passing a first mother liquor, and the second pipeline is used for passing a second mother liquor.

[0009] Optionally, in some embodiments of the present application, the input end of the reboiler is connected with a heating device, and the output end of the reboiler is connected with the preheater;

[0010] The reboiler and the preheater are provided with an adjusting valve therebetween, which disconnects and communicates the reboiler and the preheater.

[0011] Optionally, in some embodiments of the present application, the first pipeline is provided with a first valve, the second pipeline is provided with a second valve, and the third pipeline is provided with a third valve.

[0012] Optionally, in some embodiments of the present application, the first pipe is directly connected with the first rectifying tower, and the first valve controls the communication and disconnection of the first pipe with the first rectifying tower.

[0013] Optionally, in some embodiments of the present application, an output pipe is connected with the liquid phase outlet, and a driving device is arranged on the output pipe to drive the first rectifying tower kettle outflow to flow.

[0014] Optionally, in some embodiments of the present application, front and rear valves are arranged at two ends of the driving device respectively, and the front and rear valves both control the communication and disconnection of the output pipe.

[0015] Optionally, in some embodiments of the present application, the output pipe is communicated with the input pipe, so that the first rectifying tower kettle outflow enters the preheater through the output pipe and the input pipe.

[0016] Optionally, in some embodiments of the present application, a second rectifying tower is further arranged, and the output pipe is connected with the second rectifying tower.

[0017] Optionally, in some embodiments of the present application, the driving device is a driving motor, and the driving motor drives the kettle outflow in the output pipe.

[0018] Optionally, in some embodiments of the present application, a third rectifying tower is further arranged, and the gas phase outlet is connected with the third rectifying tower.

[0019] Optionally, in some embodiments of the present application, a flow meter is arranged on the first pipe.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1. The high-alkali mother liquor and the low-alkali mother liquor are mixed and then sent into the rectifying tower for treatment, so that the device can efficiently recover sodium acetate in the mother liquor, realizes the maximum utilization of resources, reduces the production cost, reduces environmental pollution, and meets the concept of green production.

[0022] 2. The preheater and the reboiler are arranged, so that the mother liquor can be preheated before entering the rectifying tower, improving the treatment efficiency. Meanwhile, the reboiler utilizes the heat generated by other rectifying tower reactions for heating, realizes the cyclic utilization of energy, reduces the energy consumption, and besides, the cooperation of the temperature monitoring device and the adjusting valve can accurately control the temperature of the preheater, ensuring the stability and reliability of the treatment process.

[0023] 3. By setting multiple valves (first valve, second valve, third valve, etc.), the device can flexibly adjust the input amount of high-alkali mother liquor and low-alkali mother liquor to adapt to different processing requirements and process conditions. This fine flow control helps to optimize the processing process and improve product quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 The overall structure schematic diagram of the recovery section-distillation column kettle effluent treatment device provided by the embodiments of the present application is shown.

[0026] Explanation of reference signs:

[0027] 100, first distillation column; 110, gas phase outlet; 120, liquid phase outlet; 121, output pipeline; 130, inlet; 200, input pipeline; 210, first pipeline; 211, first valve; 220, second pipeline; 221, second valve; 230, third pipeline; 231, third valve; 300, preheater; 400, reboiler; 410, regulating valve; 500, driving device; 510, front valve; 520, rear valve; 600, second distillation column; 700, third distillation column. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. It can be understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for clear description, and does not limit the connection mode.

[0029] Specifically, as shown in Figure 1 The recovery section-distillation column kettle effluent treatment device provided by the embodiments of the present application mainly includes a first distillation column 100, which is mainly used for treating kettle effluent, and has the following specific structure:

[0030] The preheater 300 and the reboiler 400 are arranged at one side of the first rectifying tower 100, the preheater 300 is used for preheating the inlet, in the embodiment of the application, the input pipeline 200 is arranged on the first rectifying tower 100, the input pipeline 200 is connected with the first rectifying tower 100 through the inlet 130 on the first rectifying tower 100, and the input pipeline 200 mainly comprises a first pipeline 210, a second pipeline 220 and a third pipeline 230.

[0031] The first pipeline 210 is used for conveying the first mother liquor, and the second pipeline 220 is used for conveying the second mother liquor, in the embodiment of the application, the first mother liquor is a high-alkali mother liquor, and the second mother liquor is a low-alkali mother liquor.

[0032] The high-alkali mother liquor and the low-alkali mother liquor both contain sodium acetate, the height of the alkalinity of the liquid is determined according to the height of the content of the sodium acetate, in order to recover the sodium acetate in the mother liquor, it is necessary to put the high-alkali mother liquor and the low-alkali mother liquor into the rectifying tower for treatment, first, the mother liquor in the first pipeline 210 is mixed with the mother liquor in the second pipeline 220, so that the mixed mother liquor flows into the preheater 300 through the third pipeline 230, and the preheater 300 preheats the mother liquor, and the preheating temperature is set to 65-70 DEG C in the application.

[0033] The preheated sodium acetate is heated by the reboiler 400, the output end of the reboiler 400 is connected with the preheater 300, and the input end of the reboiler 400 is connected with a heating device.

[0034] In the application, the heating device can be a heater, but in actual use, the heating device generally collects heat generated by other rectifying tower reactions, and the heat generated by other rectifying tower reactions is used to heat the preheater 300, so as to increase the temperature of the mother liquor.

[0035] In the above, the other rectifying tower generally refers to a three-tower reaction device, so as to avoid waste of heat.

[0036] In the application, since the heat of the preheater 300 needs to be controlled, a temperature monitoring device is arranged on the preheater 300, and an adjusting valve 410 is arranged between the reboiler 400 and the preheater 300, and the adjusting valve 410 is used for disconnecting and connecting the reboiler 400 and the preheater 300.

[0037] The temperature of the preheater 300 is detected by the temperature detection device, and the temperature change of the preheater 300 is controlled by the adjusting valve 410, so as to avoid temperature rise or temperature drop.

[0038] Due to the control relationship on temperature, the amount of high-alkali mother liquor and low-alkali mother liquor needs to be controlled, wherein, in the embodiment of the present application, a first valve 211 is arranged on the first pipeline 210, a second valve 221 is arranged on the second pipeline 220, and a third valve 231 is arranged on the third pipeline 230, the delivery of the mother liquor is controlled through the relationship of the first valve 211, the second valve 221 and the third valve 231, so as to facilitate the adjustment of the processing of the corresponding rectifying tower and the preheating process of the preheater 300.

[0039] In the embodiment of the present application, due to the high heat of the high-alkali mother liquor and the low-alkali mother liquor itself, sometimes it can also be directly introduced into the rectifying tower without preheating through the preheater 300, specifically, a pipeline extending from the first pipeline 210 is directly connected with the first rectifying tower 100, and the mother liquor in the first pipeline 210 is directly input into the first rectifying tower 100.

[0040] A first valve 211 is arranged on the pipeline.

[0041] Correspondingly, in the present application, the second pipeline 220 can also be directly connected with the first rectifying tower 100.

[0042] After the reaction of the mother liquor in the first rectifying tower 100, a liquid phase outlet 120 and a gas phase outlet 110 are arranged on the first rectifying tower 100, the liquid phase outlet 120 is arranged at the bottom position of the first rectifying tower 100, and the gas phase outlet 110 is arranged at the top position of the first rectifying tower 100, an output pipeline 121 is arranged at the liquid phase outlet 120, and a driving device 500 is arranged on the output pipeline 121, which drives the flow of the kettle outflow of the first rectifying tower 100.

[0043] In the embodiment of the present application, the driving device 500 is arranged as a driving motor, and the output end of the driving motor is provided with a driving fan for driving the movement of the kettle outflow of the first rectifying tower 100.

[0044] A front valve 510 and a rear valve 520 are arranged at the two end positions of the driving device 500, and the front valve 510 and the rear valve 520 are both connected and disconnected with the output pipeline 121.

[0045] When the first rectifying tower 100 reacts, the front valve 510 and the rear valve 520 are both in a closed state to avoid the flow of the kettle outflow, and when the reaction is completed, the front valve 510 and the rear valve 520 are opened to drive the flow of the kettle outflow by the driving device 500.

[0046] The driving device 500 drives the kettle outflow to flow into the second rectifying tower 600 for secondary processing, and the second rectifying tower 600 is connected with the first rectifying tower 100 through the output pipeline 121.

[0047] Correspondingly, the gas phase outlet 110 in the first rectifying tower 100 is connected with the third rectifying tower 700, so that the object in the first rectifying tower 100 is processed subsequently, and the complete processing purpose is achieved.

[0048] In the embodiment of the present application, the output pipeline 121 also communicates with the input pipeline 200, so that the first rectifying tower 100 kettle liquid enters the preheater 300 through the output pipeline 121 and the input pipeline 200.

[0049] The above embodiments are only used to illustrate the technical method of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A device for treating the column effluent from a recovery section distillation column, characterized by, The application relates to a distillation system. The first distillation column is provided with a gas phase outlet, a liquid phase outlet and an inlet; An input pipeline is connected with the inlet, so that the input pipeline communicates with the first distillation column; A preheater is arranged on the input pipeline, and a reboiler is connected with the preheater; The input pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline are respectively connected with the third pipeline, the first pipeline is used for passing first mother liquor, and the second pipeline is used for passing second mother liquor.

2. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 1, characterized in that, The input end of the reboiler is connected with a heating device, and the output end of the reboiler is connected with the preheater; An adjusting valve is arranged between the reboiler and the preheater, and the adjusting valve disconnects and communicates the reboiler and the preheater.

3. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 1, characterized by A first valve is arranged on the first pipeline, a second valve is arranged on the second pipeline, and a third valve is arranged on the third pipeline.

4. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 3, characterized by The first pipeline is directly connected with the first distillation column, and the first valve controls the communication and disconnection of the first pipeline and the first distillation column.

5. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 1, characterized by The liquid phase outlet is connected with an output pipeline, a driving device is arranged on the output pipeline, and the driving device drives the flow of the first distillation column kettle outflow.

6. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 5, characterized by Front and rear valves are arranged at the two ends of the driving device, and the front and rear valves both communicate and disconnect the output pipeline.

7. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 5, characterized in that, The output pipeline communicates with the input pipeline, so that the first distillation column kettle outflow enters the preheater through the output pipeline and the input pipeline.

8. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 7, characterized in that, A second distillation column is further arranged, and the output pipeline is connected with the second distillation column.

9. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 5, characterized by The driving device is a driving motor, and the driving motor drives the kettle outflow in the output pipeline.

10. A device for treating the effluent from the bottom of a rectification column of a recovery section according to claim 1, characterized by A third distillation column is further arranged, and the gas phase outlet is connected with the third distillation column.

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