Blow-down pipe auxiliary device for dilute acid recovery unit

Abstract

The utility model discloses a blow-down pipe auxiliary device for a dilute acid recovery unit, which relates to the technical field of acetic anhydride production and comprises a blow-down pipe, a first valve, a branch pipe, a second valve and a liquid collection tank. An open type first valve is installed at the front end of the blow-down pipe, the blow-down pipe is communicated with a branch pipe, the discharge end of the branch pipe is arranged downwards so that liquid in the blow-down pipe can flow into the branch pipe, and a second valve and a liquid collecting box are installed on the branch pipe and used for collecting the liquid in the branch pipe. The device can continuously discharge and collect liquid in the blow-down pipe, the defect that gas cannot be discharged in time due to liquid accumulation in the blow-down pipe is overcome, and the operation effect of the blow-down pipe is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of acetic anhydride production, in particular to a vent pipe auxiliary device for a dilute acid recovery unit. Background Art

[0002] Acetic anhydride generally refers to acetic anhydride, which is an organic substance, a colorless transparent liquid, with a strong acetic acid smell, sour taste, hygroscopicity, soluble in chloroform and ether, and slowly dissolved in water to form acetic acid. It is widely used in the pharmaceutical industry, dye industry, fragrance industry, etc.

[0003] During the production process, acetic anhydride reacts violently with water in the dilute acid storage tank of the dilute acid recovery unit, and the liquid is easily brought into the vent pipe. Since the venting port of the vent pipe is set upward, the liquid in the vent pipe accumulates and the gas cannot be released in time. The current method is usually manual dredging, which is laborious and time-consuming. Therefore, an auxiliary device is needed to replace manual operation to eliminate this situation. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then proposes a vent pipe auxiliary device for a dilute acid recovery unit.

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

[0006] A vent pipe auxiliary device for a dilute acid recovery unit comprises a vent pipe, a first valve, a branch pipe, a second valve and a liquid collecting box; an open first valve is installed at the front end of the vent pipe, a branch pipe is connected to the vent pipe, a discharge end of the branch pipe is arranged downward so that the liquid in the vent pipe flows into the branch pipe, a second valve is installed on the branch pipe, and a liquid collecting box is connected to the end of the branch pipe for collecting the liquid in the branch pipe.

[0007] Furthermore, the first valve is a normally open one-way valve to prevent gas-liquid backflow.

[0008] Furthermore, the liquid collecting box is transparent to facilitate staff to observe the amount of liquid inside.

[0009] Furthermore, an alarm component is installed on the liquid collecting tank to remotely warn the staff of the amount of liquid in the liquid collecting tank.

[0010] Furthermore, the alarm component includes a liquid level sensor and a buzzer. The liquid level sensor is arranged inside the liquid collecting tank and is electrically connected to the buzzer arranged outside the liquid collecting tank, so that when the liquid level sensor detects that the liquid level in the liquid collecting tank reaches a set value, the buzzer starts to alarm, thereby improving the intelligent effect of the device.

[0011] Furthermore, the liquid collecting tank is connected to a water purification tank via a liquid pump to facilitate liquid recycling.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model can continuously discharge and collect liquid in the vent pipe through the coordinated arrangement of the first valve, the branch pipe, the second valve and the liquid collecting box, avoids the disadvantage that the gas cannot be discharged in time due to the accumulation of liquid in the vent pipe, and greatly improves the operation effect of the vent pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0016] Among them: 1. Vent pipe; 2. First valve; 3. Branch pipe; 4. Second valve; 5. Liquid collecting tank; 6. Liquid level sensor; 7. Buzzer. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0018] Embodiment 1:

[0019] Refer to the attached Figure 1 As shown, a vent pipe auxiliary device for a dilute acid recovery unit includes a vent pipe 1, a first valve 2, a branch pipe 3, a second valve 4 and a liquid collecting box 5;

[0020] Among them, an open first valve 2 is installed at the front end of the vent pipe 1, and a branch pipe 3 is connected to the vent pipe 1. The discharge end of the branch pipe 3 is arranged downward to allow the liquid in the vent pipe 1 to flow into the branch pipe 3, and a second valve 4 is installed on the branch pipe 3. The end of the branch pipe 3 is connected to a liquid collecting tank 5 for collecting the liquid in the branch pipe 3.

[0021] In the above solution, the first valve 2 is a normally open one-way valve to prevent gas-liquid backflow.

[0022] In the above scheme, the liquid collecting box 5 is transparent to facilitate the staff to observe the amount of liquid inside, and when a certain amount of liquid is collected in the liquid collecting box 5, the second valve 4 can be closed to remove the liquid collecting box 5 and process the liquid in the liquid collecting box 5. Since the second valve 4 is in a closed state, the branch pipe 3 can collect the liquid for a period of time.

[0023] Embodiment 2:

[0024] The difference from the first embodiment is that it is considered that the guide staff can confirm the amount of liquid in the liquid collecting box 5 from a distance. Figure 2 As shown, an alarm component is installed on the liquid collecting tank 5. Specifically, the alarm component includes a liquid level sensor 6 and a buzzer 7. The liquid level sensor 6 is arranged inside the liquid collecting tank 5 and is electrically connected to the buzzer 7 arranged outside the liquid collecting tank 5, so that the liquid level sensor 6 detects that the liquid level in the liquid collecting tank 5 reaches a set value, and the buzzer 7 starts to alarm to alert the staff.

[0025] The pressure gauge 8 is also electrically connected to the injector, so that the standard value of the pressure gauge 8 changes, and the injector is automatically started, thereby improving the intelligent effect of the device.

[0026] Embodiment 3:

[0027] In order to allow the staff to uniformly process the liquid in the liquid collecting box 5, the liquid collecting box 5 is connected to a water purification tank (not shown in the figure) via a liquid pump (not shown in the figure).

[0028] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A vent pipe auxiliary device for a dilute acid recovery unit, comprising a vent pipe (1), characterized in that: It also includes a first valve (2), a branch pipe (3), a second valve (4) and a liquid collecting box (5); An open first valve (2) is installed at the front end of the vent pipe (1), a branch pipe (3) is connected to the vent pipe (1), the discharge end of the branch pipe (3) is arranged downward, a second valve (4) is installed on the branch pipe (3), and the end of the branch pipe (3) is connected to a liquid collecting tank (5).

2. A vent pipe auxiliary device for a dilute acid recovery unit according to claim 1, characterized in that: The first valve (2) is a normally open one-way valve.

3. A vent pipe auxiliary device for a dilute acid recovery unit according to claim 1, characterized in that: The liquid collecting box (5) is transparent.

4. A vent pipe auxiliary device for a dilute acid recovery unit according to claim 1, characterized in that: An alarm component is installed on the liquid collecting box (5) to alert staff members at a long distance of the amount of liquid in the liquid collecting box (5).

5. A vent pipe auxiliary device for a dilute acid recovery unit according to claim 4, characterized in that: The alarm component comprises a liquid level sensor (6) and a buzzer (7); The liquid level sensor (6) is arranged inside the liquid collecting tank (5) and is electrically connected to a buzzer (7) arranged outside the liquid collecting tank (5), so that when the liquid level sensor (6) detects that the liquid level in the liquid collecting tank (5) reaches a set value, the buzzer (7) starts to alarm.

6. A vent pipe auxiliary device for a dilute acid recovery unit according to claim 1, characterized in that: The liquid collecting tank (5) is connected to a water purification tank via a liquid pump.

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