A residue unit slag discharge pipeline with dredging function

Abstract

The utility model discloses a residue unit slag discharge pipeline with a dredging function, which relates to the technical field of acetic anhydride production, and includes a slag discharge pipe, a first electric valve, a nitrogen pipe, a second electric valve, a pressure gauge, a one-way valve and a circuit switching switch; the slag discharge pipe is equipped with a first electric valve and two nitrogen pipes, and the two nitrogen pipes are sequentially equipped with a second electric valve, a pressure gauge electrically connected to the second electric valve and a normally open one-way valve, and the two second electric valves are electrically connected through a circuit switching switch. The device has a safety function, and when one of the nitrogen pipes does not work, the other nitrogen pipe will automatically start to take over the work, so that the nitrogen purge operation can be carried out normally, which greatly improves the work quality and has a high use effect.

Description

Technical Field

[0001] The utility model relates to the technical field of acetic anhydride production, in particular to a residue unit slag discharge pipeline with a dredging function. 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] When the residue unit in the acetic anhydride production system is in operation, the residue recovery unit uses a pipeline for slag discharge. During the slag discharge process, the pipeline may be blocked. After the blockage, manual unblocking is performed, which is time-consuming and laborious, and has low safety.

[0004] To this end, according to the existing technical situation, a nitrogen purging method is adopted to treat the residue. During the implementation process, a nitrogen pipe is led out from the slag discharge pipe as a slag discharge pipeline with a dredging function. When the residue in the slag discharge pipe needs to be treated, the electric valve on the nitrogen pipe is started to complete the purging treatment of the residue in the slag discharge pipe. However, during use, the electric valve is prone to malfunction, resulting in the nitrogen pipe being unable to introduce nitrogen into the slag discharge pipe in time. Therefore, it is necessary to add a safety design. Utility Model Content

[0005] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose a residue unit slag discharge pipeline with a dredging function.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A residue unit slag discharge pipeline with a dredging function comprises a slag discharge pipe, a first electric valve, a nitrogen pipe, a second electric valve, a pressure gauge, a one-way valve and a circuit switching switch; the slag discharge pipe is equipped with the first electric valve and two nitrogen pipes, the two nitrogen pipes are sequentially equipped with the second electric valve, a pressure gauge electrically connected to the second electric valve and a normally open one-way valve, and the two second electric valves are electrically connected via the circuit switching switch.

[0008] Furthermore, each of the two pressure gauges is electrically connected to a buzzer. When the second electric valve on one of the nitrogen pipes is started and there is no normal standard pressure value on the pressure gauge, the buzzer sounds an alarm to remind the staff to check the nitrogen pipe.

[0009] Furthermore, the two buzzer alarm sounds are different to facilitate staff to distinguish the fault states of the two second electric valves.

[0010] Furthermore, a manual valve is installed on each of the two nitrogen pipes to facilitate the staff to repair the faulty second electric valve on one of the nitrogen pipes without affecting the normal operation of the second electric valve on the other nitrogen pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model designs a traditional nitrogen pipe into two, and sequentially installs a second electric valve, a pressure gauge electrically connected to the second electric valve and a normally open one-way valve on the two nitrogen pipes, and makes the two second electric valves electrically connected through a circuit switching switch; when one of the nitrogen pipes does not work, the other nitrogen pipe automatically starts to take over the work, so that the nitrogen purging operation can be carried out normally, which greatly improves the work quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0014] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0015] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0016] Among them: 1. Slag discharge pipe; 2. First electric valve; 3. Nitrogen pipe; 4. Second electric valve; 5. Pressure gauge; 6. Check valve; 7. Circuit switching switch; 8. Buzzer; 9. Manual valve. 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] See attached Figure 1 As shown, a residue unit slag discharge pipeline with a dredging function includes a slag discharge pipe 1, a first electric valve 2, a nitrogen pipe 3, a second electric valve 4, a pressure gauge 5, a one-way valve 6 and a circuit switching switch 7; the slag discharge pipe 1 is equipped with the first electric valve 2 and two nitrogen pipes 3, and the two nitrogen pipes 3 are sequentially equipped with the second electric valve 4, the pressure gauge 5 electrically connected to the second electric valve 4 and the normally open one-way valve 6, and the two second electric valves 4 are electrically connected through the circuit switching switch 7.

[0020] In the specific real-time process of this embodiment, when it is necessary to process the residue in the slag discharge pipe 1, the second electric valve 4 on one of the nitrogen pipes 3 is started. At this time, there is a normal standard pressure value on the pressure gauge 5, which means that the second electric valve 4 on the nitrogen pipe 3 is operating normally. Then, the nitrogen in the nitrogen pipe 3 can complete the purging process of the residue in the slag discharge pipe 1 through the one-way valve 6, and the one-way valve 6 can prevent the nitrogen from flowing back. If there is no normal standard pressure value on the pressure gauge 5 on the nitrogen pipe 3, it means that the second electric valve 4 on the nitrogen pipe 3 is faulty. Then, the circuit switching switch 7 switches the electrical signal to the second electric valve 4 on another nitrogen pipe 3. At this time, the second electric valve 4 on the nitrogen pipe 3 is opened to complete the purging process of the residue in the slag discharge pipe 1. The work quality and speed are greatly improved, making the operation process simple, efficient, safe and stable.

[0021] Embodiment 2:

[0022] The difference from the first embodiment is that, in order to facilitate the staff to know the operating state of the second electric valve 4, for this purpose, refer to the attached Figure 2 As shown, each of the two pressure gauges 5 is electrically connected to a buzzer 8. When the second electric valve 4 on one of the nitrogen pipes 3 is started and there is no normal standard pressure value on the pressure gauge 5, the buzzer 8 sounds an alarm to remind the staff to check the nitrogen pipe 3. In addition, in order to facilitate the staff to distinguish the fault status of the two second electric valves 4, the alarm sounds of the two buzzers 8 are different.

[0023] Embodiment 3:

[0024] In order to facilitate the staff to repair the faulty second electric valve 4 on one of the nitrogen pipes 3 without affecting the normal operation of the second electric valve 4 on the other nitrogen pipe 3, for this purpose, refer to the attached Figure 3 As shown, a manual valve 9 is installed on each of the two nitrogen pipes 3, and the manual valve 9 is in a normally open state. When it is necessary to repair the faulty second electric valve 4 on one of the nitrogen pipes 3, the manual valve 9 on the nitrogen pipe 3 can be closed.

[0025] 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 residue unit slag discharge pipeline with a dredging function, comprising a slag discharge pipe (1), a first electric valve (2), a nitrogen pipe (3) and a second electric valve (4), wherein the slag discharge pipe (1) is provided with the first electric valve (2) and the nitrogen pipe (3), and the nitrogen pipe (3) is provided with the second electric valve (4), characterized in that: It also includes a pressure gauge (5), a one-way valve (6) and a circuit switching switch (7); There are two nitrogen pipes (3), and the two nitrogen pipes (3) are sequentially installed with a second electric valve (4), a pressure gauge (5) electrically connected to the second electric valve (4), and a normally open one-way valve (6), and the two second electric valves (4) are electrically connected via a circuit switching switch (7).

2. The residue unit slag discharge pipeline with dredging function according to claim 1 is characterized in that: Each of the two pressure gauges (5) is electrically connected to a buzzer (8).

3. The residue unit slag discharge pipeline with dredging function according to claim 2 is characterized in that: The alarm sounds of the two buzzers (8) are different.

4. A residue unit slag discharge pipeline with dredging function according to claim 1 or 2, characterized in that: A manual valve (9) is installed on each of the two nitrogen pipes (3).

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