Methanol residual liquid recovery device

Abstract

The utility model relates to the technical field of raffinate recovery devices, in particular to a methanol raffinate recovery device which comprises a recovery tank, the recovery tank is connected with a raffinate inlet pipeline, a liquid discharge pipeline, an exhaust pipeline and a gas inlet pipeline, one end of the raffinate inlet pipeline far away from the recovery tank is connected with a liquid inlet, and a buffer tank is arranged in the middle of the raffinate inlet pipeline. Valves are arranged at the inlet and the outlet of the buffer tank; one end of the exhaust pipeline away from the recovery tank is connected with a torch system; the middle part of the exhaust pipeline is connected with a steam heater for heating gas in the exhaust pipeline; according to the utility model, the buffer tank and the valve are arranged, so that the communication between the recovery tank and the outside is avoided, and the leakage of toxic gas in the tank and the entering of air into the tank are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to residual liquid recovery device technical field, specifically is a kind of methanol residual liquid recovery device. BACKGROUND

[0002] Patent No.202321538035.1 discloses a kind of methanol waste liquid recovery system, the methanol waste liquid is from the methanol waste liquid absorbed acidic gas, the acidic gas comes from the process of coal gasification reaction and CO conversion reaction, the methanol waste liquid recovery system includes waste liquid collection tank;The waste liquid collection tank includes tank pressure adjusting part, the tank pressure adjusting part is used to adjust the pressure of the tank cavity of the waste liquid collection tank;The tank pressure adjusting part is set as the pressure regulating pipe being communicated with the tank cavity, and a pressure regulating valve is installed on the pressure regulating pipe.

[0003] The disadvantages of the patent No.202321538035.1 are: 1, when adding waste liquid into the waste liquid collection tank, toxic gas in the tank may run out and air may enter the tank;2, nitrogen gas pipeline and tank gas discharge pipeline share a pipeline, and toxic gas in the tank cannot be replaced out by nitrogen gas. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of methanol residual liquid recovery device, to solve the above-mentioned prior art when adding waste liquid into the waste liquid collection tank, toxic gas in the tank may run out and air may enter the tank, and the problem that nitrogen gas pipeline and tank gas discharge pipeline share a pipeline, and toxic gas in the tank cannot be replaced out by nitrogen gas.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of methanol residual liquid recovery device, including recovery tank, recovery tank is connected with residual liquid inlet pipeline, liquid discharge pipeline, exhaust pipe and gas inlet pipeline, residual liquid inlet pipeline is connected with liquid inlet at one end far from recovery tank, and buffer tank is arranged in the middle of residual liquid inlet pipeline, and the inlet and outlet of buffer tank are provided with valve.

[0006] Further, one end of the exhaust pipe far from the recovery tank is connected with a flare system;The middle part of the exhaust pipe is connected with a steam heater for heating the gas in the exhaust pipe.

[0007] Further, a pressure controller is arranged on the recovery tank, and an electromagnetic valve electrically connected with the pressure controller is arranged on the exhaust pipe and the gas inlet pipeline.

[0008] Further, a liquid discharge pump is arranged on the liquid discharge pipeline.

[0009] Further, the liquid inlet is conical, and filter cotton is arranged on the top of the liquid inlet.

[0010] Further, a liquid level meter is arranged on the recovery tank.

[0011] The utility model discloses a buffer tank and valve are set up, when adding waste liquid in the recovery tank, can first close the valve of buffer tank export, fill up the waste liquid in buffer tank, then close the valve of buffer tank import again, open the export valve, add the waste liquid in buffer tank to the recovery tank, thereby avoided the intercommunication of recovery tank and outside, greatly reduced the poisonous gas of tank and the air into tank.

[0012] The utility model discloses a gas inlet pipeline and gas outlet pipeline are two independent pipelines, can realize the nitrogen gas from the gas inlet pipeline, from the gas outlet pipeline exhaust, utilize the nitrogen gas of gas inlet pipeline and replace the toxic gas in recovery tank, through setting up steam heater, can heat the low temperature toxic gas and discharge to the flare system combustion and discharge. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings accompanying the specification provide further understanding of the utility model, and the illustrative embodiments of the utility model and the explanation thereof are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0014] Figure 1 It is the structure schematic view of methanol residual liquid recovery device in the embodiment;

[0015] In the drawing: 1, recovery tank;2, residual liquid inlet pipeline;3, liquid outlet pipeline;4, gas outlet pipeline;5, gas inlet pipeline;6, liquid inlet;7, buffer tank;8, valve;9, steam heater;10, pressure controller;11, electromagnetic valve;12, liquid outlet pump;13, filter cotton;14, liquid level meter. DETAILED DESCRIPTION

[0016] It is to be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0017] As Figure 1 As shown in the drawing, according to the embodiment of the utility model, a kind of methanol residual liquid recovery device is provided, including recovery tank 1, recovery tank 1 is connected with residual liquid inlet pipeline 2, liquid outlet pipeline 3, gas outlet pipeline 4 and gas inlet pipeline 5, residual liquid inlet pipeline 2 is connected with liquid inlet 6 in the end far from recovery tank 1, and the middle part of residual liquid inlet pipeline 2 is equipped with buffer tank 7, and the import and export of buffer tank 7 are equipped with valve 8.

[0018] Liquid outlet pump 12 is arranged on liquid outlet pipeline 3;Liquid inlet 6 is conical, and the top of liquid inlet 6 is equipped with filter cotton 13;Recovery tank 1 is provided with liquid level meter 14;Methanol residual liquid enters into recovery tank 1 from liquid inlet 6, and toxic and explosive gas generated by methanol residual liquid volatilization in pipe is discharged through gas outlet pipeline 4, and methanol residual liquid in recovery tank 1 is discharged to methanol storage tank and is recovered.

[0019] When the waste liquid is added into the recovery tank 1, the valve at the outlet of the buffer tank 7 is closed first, the buffer tank 7 is filled with the waste liquid, at this time, the buffer tank 7 has little air; then the valve at the inlet of the buffer tank 7 is closed, the buffer tank 7 is isolated from the outside air, the valve at the outlet is opened, the waste liquid in the buffer tank 7 flows into the recovery tank 1 under the action of gravity; the whole process avoids the connection between the recovery tank 1 and the outside, greatly reduces the escape of toxic gas in the tank and the entry of air into the tank.

[0020] In some embodiments, the recovery tank 1 is provided with a pressure controller 10, the exhaust pipe 4 and the air inlet pipe 5 are provided with electromagnetic valves 11 electrically connected with the pressure controller 10; the pressure controller 10 can detect the pressure in the recovery tank and transmit signals to the electromagnetic valves 11 to control the air inlet and exhaust, so as to control the pressure in the recovery tank 1 within a set range.

[0021] The end of the exhaust pipe 4 away from the recovery tank 1 is connected with a flare system; the middle part of the exhaust pipe 4 is connected with a steam heater 9 for heating the gas in the exhaust pipe 4.

[0022] The air inlet pipe 5 and the exhaust pipe 4 are two independent pipes, which can realize the nitrogen inlet from the air inlet pipe 5 and the gas exhaust from the exhaust pipe 4, and the toxic gas in the recovery tank 1 is replaced out by the nitrogen inlet from the air inlet pipe 5; by setting the steam heater 9, the low-temperature toxic gas can be heated and then discharged to the flare system for combustion and emission.

[0023] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A methanol residue recovery device, comprising a recovery tank (1), wherein the recovery tank (1) is connected to a residue inlet pipe (2), a discharge pipe (3), an exhaust pipe (4), and an air inlet pipe (5), wherein the end of the residue inlet pipe (2) furthest from the recovery tank (1) is connected to a liquid inlet (6), characterized in that, The middle part of the residual liquid inlet pipe (2) is provided with a buffer tank (7), and the inlet and outlet of the buffer tank (7) are provided with valves (8).

2. The methanol residue recovery device as described in claim 1, characterized in that, The exhaust pipe (4) is connected to a flare system at one end away from the recovery tank (1); a steam heater (9) for heating the gas in the exhaust pipe (4) is connected to the middle of the exhaust pipe (4).

3. The methanol residue recovery device as described in claim 1, characterized in that, The recycling tank (1) is equipped with a pressure controller (10), and the exhaust pipe (4) and the intake pipe (5) are equipped with solenoid valves (11) that are electrically connected to the pressure controller (10).

4. The methanol residue recovery device as described in claim 1, characterized in that, The drain pipe (3) is equipped with a drain pump (12).

5. The methanol residue recovery device as described in claim 1, characterized in that, The liquid inlet (6) is conical, and the top of the liquid inlet (6) is provided with filter cotton (13).

6. The methanol residue recovery device as described in claim 1, characterized in that, The recovery tank (1) is equipped with a level gauge (14).

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