Polymerization inhibitor replenishing device

Abstract

The utility model discloses a polymerization inhibitor replenishing device which comprises a butadiene storage tank, a polymerization inhibitor replenishing funnel and a polymerization inhibitor replenishing tank, a butadiene circulating pipeline is led out from an outlet of the butadiene storage tank, is sequentially connected with a delivery pump and a pipeline mixer, and then is connected into an inlet of the butadiene storage tank; a polymerization inhibitor replenishing pipeline is led out from an outlet of the polymerization inhibitor replenishing funnel and is connected with a butadiene circulating pipeline on the feeding side of the conveying pump after being connected with a polymerization inhibitor replenishing tank, and the polymerization inhibitor replenishing tank is respectively connected with a nitrogen introducing pipeline and a waste gas discharging pipeline. According to the utility model, nitrogen charging and pressure maintaining are carried out before the polymerization inhibitor is supplemented, so that oxygen can be prevented from entering, the safety risk is reduced, and the polymerization inhibitor can be supplemented by utilizing pressure difference; meanwhile, the pipeline mixer is additionally arranged, so that the mixing effect of the polymerization inhibitor and butadiene is effectively improved, and uniform addition of the polymerization inhibitor is realized.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically a polymerization inhibitor replenishment device. Background Technology

[0002] Butadiene is an important chemical raw material, mainly used in the production of synthetic rubber and plastics. However, butadiene is also a chemical substance that readily undergoes self-polymerization. During storage and transportation, it easily forms solids, leading to blockages or cracks in pipes, valves, and equipment, and even causing safety accidents such as fires and explosions. To address this problem, a certain amount of polymerization inhibitor is usually added to butadiene to prevent further polymerization, thereby ensuring the quality and stability of butadiene.

[0003] Because butadiene is stored in a compressed liquid state in the tank, it is oxygen-sensitive and under pressure. Directly adding the polymerization inhibitor using a conventional feeding tank can easily introduce oxygen, posing a safety risk. In addition, directly adding the polymerization inhibitor into the butadiene delivery pipeline can easily result in poor mixing. Utility Model Content

[0004] The purpose of this invention is to overcome the defects and deficiencies of the existing technology and provide a polymerization inhibitor replenishment device. Before replenishing the polymerization inhibitor, nitrogen is used to maintain pressure to prevent oxygen from entering and reduce safety risks. The polymerization inhibitor is replenished by utilizing the pressure difference. Furthermore, by adding a pipeline mixer, the mixing effect of the polymerization inhibitor and butadiene is improved, and uniform addition of the polymerization inhibitor is achieved.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A polymerization inhibitor replenishment device includes a butadiene storage tank, a polymerization inhibitor replenishment funnel, and a polymerization inhibitor replenishment tank. The device is characterized in that: a butadiene circulation pipeline is led out from the outlet of the butadiene storage tank, sequentially connected to a delivery pump and a pipeline mixer, and then connected to the inlet of the butadiene storage tank; a polymerization inhibitor replenishment pipeline is led out from the outlet of the polymerization inhibitor replenishment funnel, connected to the polymerization inhibitor replenishment tank, and then connected to the butadiene circulation pipeline on the feed side of the delivery pump; a nitrogen inlet pipeline and a waste gas outlet pipeline are respectively connected to the polymerization inhibitor replenishment tank.

[0007] Furthermore, the outlet and inlet of the butadiene storage tank are respectively connected to an outlet valve and an inlet valve.

[0008] Furthermore, the inlet end and outlet end of the delivery pump are respectively connected to inlet valve two and outlet valve two.

[0009] Furthermore, the outlet of the polymerization inhibitor replenishment funnel is connected to a root valve.

[0010] Furthermore, the outlet of the polymerization inhibitor replenishment tank is connected to an outlet valve three.

[0011] Furthermore, the nitrogen inlet pipeline is connected to a self-regulating valve and a root valve.

[0012] Furthermore, a valve three is connected to the exhaust gas discharge pipeline.

[0013] Furthermore, pressure gauges and level gauges are respectively installed on both sides of the polymerization inhibitor replenishment tank.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model adds a nitrogen inlet pipeline with a self-regulating valve to a conventional feeding tank. Nitrogen is used to pressurize the tank before adding the polymerization inhibitor, which can not only prevent oxygen from entering and reduce safety risks, but also use the pressure difference to add the polymerization inhibitor. At the same time, the addition of an exhaust gas pipeline can send the nitrogen-purged exhaust gas to the exhaust gas post-treatment system without affecting the environment.

[0016] 2. This utility model adds a pipeline mixer to the pipeline on the discharge side of the conveying pump, which effectively improves the mixing effect of the polymerization inhibitor and butadiene, and realizes the uniform addition of the polymerization inhibitor. The whole device is simple to operate, requires little maintenance, is safe and reliable, and is economical and practical. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figure 1 An inhibitor replenishment device includes a butadiene storage tank 1, an inhibitor replenishment funnel 15, and an inhibitor replenishment tank 9. A butadiene circulation pipeline is led out from the outlet of the butadiene storage tank 1, connected in sequence to a delivery pump 4 and a pipeline mixer 6, and then connected to the inlet of the butadiene storage tank 1. An inhibitor replenishment pipeline is led out from the outlet of the inhibitor replenishment funnel 15, connected to the inhibitor replenishment tank 9, and then connected to the butadiene circulation pipeline on the feed side of the delivery pump 4. A nitrogen inlet pipeline 18 and a waste gas outlet pipeline 13 are respectively connected to the inhibitor replenishment tank 9.

[0020] In this invention, the outlet and inlet of the butadiene storage tank 1 are respectively connected to an outlet valve 2 and an inlet valve 7, thereby controlling the opening and closing of the outlet and inlet of the butadiene storage tank 1.

[0021] In this invention, the inlet end and outlet end of the delivery pump 4 are respectively connected to inlet valve 3 and outlet valve 5, so as to control the opening and closing of the butadiene circulation pipeline.

[0022] In this invention, the outlet of the inhibitor replenishment funnel 15 is connected to a root valve 14, thereby controlling the opening and closing of the inhibitor replenishment pipeline on the discharge side of the inhibitor replenishment funnel 15.

[0023] In this invention, the outlet of the inhibitor replenishment tank 9 is connected to an outlet valve 8, thereby controlling the opening and closing of the inhibitor replenishment pipeline on the discharge side of the inhibitor replenishment tank 9.

[0024] In this invention, a self-regulating valve 17 and a root valve 16 are connected to the nitrogen inlet pipeline 18, so as to control the pressure of the nitrogen introduced into the polymerization inhibitor replenishment tank 9 and to control the opening and closing of the nitrogen inlet pipeline 18.

[0025] In this invention, a root valve 12 is connected to the exhaust gas discharge pipeline 13 to control the opening and closing of the exhaust gas discharge pipeline 13.

[0026] In this invention, pressure gauges 11 and level gauges 10 are respectively installed on both sides of the polymerization inhibitor replenishment tank 9 to monitor the pressure and level in the polymerization inhibitor replenishment tank 9.

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Add polymerization inhibitor to polymerization inhibitor replenishment tank 9: Open root valve 14 and root valve 32, and add polymerization inhibitor to polymerization inhibitor replenishment tank 9 through polymerization inhibitor replenishment funnel 15. After adding, close root valve 14 and root valve 32.

[0029] Nitrogen purging of inhibitor replenishment tank 9: Set the pressure of self-regulating valve 17 to about 0.1 MPa higher than that of butadiene storage tank 1, then open root valve 2 16 to introduce nitrogen into inhibitor replenishment tank 9 and pressurize it. After the nitrogen purging is completed, close root valve 2 16 and open root valve 3 12 to release pressure. Repeat this purging process at least three times, then open root valve 2 16 again to purge nitrogen and maintain pressure.

[0030] Establish butadiene circulation: Open outlet valve 12, inlet valve 23, outlet valve 25 and inlet valve 17, start transfer pump 4, and butadiene circulates inside and outside butadiene storage tank 1 through butadiene circulation pipeline.

[0031] Adding polymerization inhibitor: Slowly open outlet valve 38. The polymerization inhibitor flows from the polymerization inhibitor replenishment tank 9 into the butadiene circulation pipeline. It is initially mixed with butadiene by the transfer pump 4, and then fully mixed by the pipeline mixer 6 before returning to the butadiene storage tank 1.

[0032] After the polymerization inhibitor is added, close outlet valve 38 and root valve 216, open root valve 312, depressurize the polymerization inhibitor addition tank 9 to 0.05MPa, then close root valve 312 and maintain the pressure.

[0033] After the polymerization inhibitor is added, the transfer pump 4 continues to run for a period of time according to its flow rate and the capacity of the butadiene storage tank 1 to ensure that the polymerization inhibitor and butadiene are fully mixed.

[0034] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0035] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A polymerization inhibitor replenishment device, comprising a butadiene storage tank, a polymerization inhibitor replenishment funnel, and a polymerization inhibitor replenishment tank, characterized in that: A butadiene circulation pipeline is led out from the outlet of the butadiene storage tank, connected in sequence to a delivery pump and a pipeline mixer, and then connected to the inlet of the butadiene storage tank; an inhibitor replenishment pipeline is led out from the outlet of the inhibitor replenishment funnel, connected to the inhibitor replenishment tank, and then connected to the butadiene circulation pipeline on the feed side of the delivery pump; a nitrogen inlet pipeline and a waste gas outlet pipeline are respectively connected to the inhibitor replenishment tank.

2. The polymerization inhibitor replenishment device according to claim 1, characterized in that: The butadiene storage tank is connected to an outlet valve and an inlet valve, respectively.

3. The polymerization inhibitor replenishment device according to claim 1, characterized in that: The inlet and outlet ends of the delivery pump are respectively connected to inlet valve two and outlet valve two.

4. The polymerization inhibitor replenishment device according to claim 1, characterized in that: The outlet of the polymerization inhibitor replenishment funnel is connected to a root valve.

5. The polymerization inhibitor replenishment device according to claim 1, characterized in that: The outlet of the polymerization inhibitor replenishment tank is connected to an outlet valve three.

6. The polymerization inhibitor replenishment device according to claim 1, characterized in that: The nitrogen inlet pipeline is connected to a self-regulating valve and a root valve.

7. The polymerization inhibitor replenishment device according to claim 1, characterized in that: The exhaust gas discharge pipeline is connected to a valve three.

8. The polymerization inhibitor replenishment device according to claim 1, characterized in that: Pressure gauges and level gauges are installed on both sides of the polymerization inhibitor replenishment tank, respectively.

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