Inerting gas preparation device matched with styrene storage tank

Abstract

The utility model belongs to the technical field of environmental protection equipment, and relates to an inert gas preparation device matched with a styrene storage tank, which comprises an air pipeline system (1), a nitrogen pipeline system (2), a gas static mixer (3), an inert gas pipeline system (4) and a control system (5), the nitrogen pipeline system (2) is provided with a second pneumatic control valve (23), the inerting gas pipeline system (4) is provided with an oxygen content analyzer (43), and the first pneumatic control valve (13), the second pneumatic control valve (23) and the oxygen content analyzer (43) are all connected with the control system (5). The device has the advantages of simple structure, small equipment size, simplicity and convenience in operation and the like, and the production cost and the occupied area are greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection equipment and relates to an inert gas preparation device, in particular to an inert gas preparation device matched with a styrene storage tank. Background Art

[0002] Styrene is an organic compound formed by replacing one of the oxygen atoms of ethylene with benzene. The electrons of the vinyl group are conjugated with the benzene ring, making it insoluble in water but soluble in ethanol and ether. The chemical properties of its monomer are very active, and in the absence of any polymerization inhibitor, it is easy to undergo self-polymerization. This reaction is exothermic, and if not controlled, it will cause the temperature to continue to rise and even cause the tank to explode. Therefore, it is necessary to regularly add polymerization inhibitors to the styrene storage tank to control the storage temperature in the styrene storage tank to reduce the risk of polymerization. Inhibitors require a certain amount of dissolved oxygen to maintain their activity, thereby extending the service life of the inhibitors. However, excessive dissolved oxygen will bring a series of problems.

[0003] During styrene storage, the inert gas in the upper vapor space of the tank gradually displaces oxygen from the styrene, allowing oxygen to enter the gas phase and gradually increasing the oxygen content in the upper vapor space of the tank. When the oxygen content in the gas phase reaches 8% (V / V), the risk of gas-phase explosion increases. Therefore, the oxygen content in the styrene should be frequently replenished with air to ensure the effective inhibition of the polymerization inhibitor. At the same time, the inert gas in the upper vapor space of the tank should be replaced and replenished to prevent the oxygen content in the gas phase from increasing to 8%.

[0004] However, there is no specially matched inert gas preparation device for styrene storage tanks in the prior art, and styrene storage tanks have certain safety hazards.

[0005] Therefore, in order to overcome the above-mentioned defects of the prior art, it is necessary to develop a new type of inert gas preparation device for styrene storage tanks. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an inert gas preparation device for a styrene storage tank, which has the advantages of simple structure, small equipment volume, simple and convenient operation, and greatly reduces production costs and floor space.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] An inert gas preparation device for use with a styrene storage tank comprises an air piping system, a nitrogen piping system, a gas static mixer, and an inert gas piping system, wherein the air piping system and the nitrogen piping system are respectively connected to the air inlet and the nitrogen inlet of the gas static mixer, and the inert gas piping system is connected to the gas outlet of the gas static mixer. The device is characterized in that it further comprises a control system, wherein the air piping system is provided with a first pneumatic regulating valve, the nitrogen piping system is provided with a second pneumatic regulating valve, and the inert gas piping system is provided with an oxygen content analyzer, and the first pneumatic regulating valve, the second pneumatic regulating valve, and the oxygen content analyzer are all connected to the control system, and the control system implements interlocking control of the first pneumatic regulating valve and the second pneumatic regulating valve based on the inert gas oxygen content monitored online by the oxygen content analyzer.

[0009] Preferably, the air pipeline system is further provided with a first manual shut-off valve, a first check valve and a first on-site pressure gauge.

[0010] Preferably, the first manual shut-off valve, the first on-site pressure gauge, the first check valve and the first pneumatic regulating valve are sequentially connected in series on the air pipeline system.

[0011] Preferably, the nitrogen pipeline system is further provided with a second manual shut-off valve, a second check valve and a second on-site pressure gauge.

[0012] Preferably, the second manual shut-off valve, the second on-site pressure gauge, the second check valve and the second pneumatic regulating valve are sequentially connected in series on the nitrogen pipeline system.

[0013] Preferably, the inerting gas pipeline system is further provided with a third manual shut-off valve and a third on-site pressure gauge.

[0014] Preferably, the oxygen content analyzer, the third manual shut-off valve and the third on-site pressure gauge are sequentially connected in series on the inerting gas pipeline system.

[0015] Compared with the prior art, the inert gas preparation device for the styrene storage tank of the present invention has one or more of the following beneficial technical effects:

[0016] 1. The utility model provides an inert gas preparation device for a styrene storage tank, which effectively solves the problem that styrene is easily polymerized during storage, thereby causing product deterioration. A certain amount of oxygen is introduced into the polymerization inhibitor to ensure the activity of the polymerization inhibitor, effectively prolong the storage time of styrene, and reduce the escape of styrene gas.

[0017] 2. The utility model has the advantages of simple structure, small size, simple and convenient operation, etc. It greatly reduces production costs and floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an inert gas preparation device matched with a styrene storage tank of the utility model. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0021] Figure 1 The figure shows the structure diagram of the inert gas preparation device matched with the styrene storage tank of the present invention. Figure 1 As shown, the inert gas preparation device for the styrene storage tank of the present invention includes an air pipeline system 1, a nitrogen pipeline system 2, a gas static mixer 3 and an inert gas pipeline system 4.

[0022] Wherein, the air piping system 1 is connected to the air inlet of the gas static mixer 3 to input air into the gas static mixer 3. The nitrogen piping system 2 is connected to the nitrogen inlet of the gas static mixer 3 to input nitrogen into the gas static mixer 3. Air and nitrogen are mixed in the gas static mixer 3 to form an inert gas. The inert gas piping system 4 is connected to the gas outlet of the gas static mixer 3. The inert gas formed after mixing is transported to the styrene storage tank through the inert gas piping system 4 to provide the styrene storage tank with inert gas, thereby effectively solving the problem that styrene is prone to polymerization during storage, thereby causing product deterioration, and introducing a certain amount of oxygen into the inhibitor to ensure the activity of the inhibitor, effectively extending the storage time of styrene, and reducing the escape of styrene gas.

[0023] In the present invention, the inert gas preparation device for the styrene storage tank further includes a control system 5. Furthermore, the air piping system 1 is provided with a first pneumatic regulating valve 13, which is capable of adjusting the amount of air input into the gas static mixer 3. The nitrogen piping system 2 is provided with a second pneumatic regulating valve 23, which is capable of adjusting the amount of nitrogen input into the gas static mixer 3. Thus, the oxygen content of the mixed inert gas can be adjusted. The inert gas piping system 4 is provided with an oxygen content analyzer 43, which is capable of online monitoring the oxygen content of the mixed inert gas.

[0024] The first pneumatic control valve 13, the second pneumatic control valve 23, and the oxygen content analyzer 43 are all connected to the control system 5. Thus, the control system 5 can implement interlocking control of the first pneumatic control valve 13 and the second pneumatic control valve 23 based on the oxygen content of the inert gas monitored online by the oxygen content analyzer 43, thereby controlling the oxygen content of the mixed inert gas within the range of 3% to 8%, thereby preparing inert gas that meets the requirements of the styrene storage tank.

[0025] In the present invention, the control system 5 only needs to be able to achieve interlocked control of the first and second pneumatic control valves 13 and 23 based on the inert gas oxygen content monitored online by the oxygen content analyzer 43. No specific requirements are placed on the specific structure or other functions of the control system 5. Therefore, the control system 5 is not the focus or inventive point of the present invention. It can adopt any existing technology with such functionality, such as an existing single-chip microcomputer or any existing industrial control system with such functionality, and the present invention does not limit such technology.

[0026] Furthermore, in the present invention, the air piping system 1 is preferably further provided with a first manual shut-off valve 11, a first check valve 12, and a first on-site pressure gauge 14. More preferably, the first manual shut-off valve 11, the first on-site pressure gauge 14, the first check valve 12, and the first pneumatic regulating valve 13 are sequentially connected in series on the air piping system 1. The first manual shut-off valve 11 allows for manual shut-off of the air piping system 1 to prevent air from being fed into the gas static mixer 3. The first check valve 12 prevents backflow of inert gas in the gas static mixer 3. The first on-site pressure gauge 14 facilitates monitoring of the air pressure in the air piping system 1.

[0027] Furthermore, the nitrogen pipeline system 2 is preferably further provided with a second manual shut-off valve 21, a second check valve 22, and a second on-site pressure gauge 24. More preferably, the second manual shut-off valve 21, the second on-site pressure gauge 24, the second check valve 22, and the second pneumatic regulating valve 23 are sequentially connected in series on the nitrogen pipeline system 2. The second manual shut-off valve 21 allows manual shut-off of the nitrogen pipeline system 2 to prevent nitrogen from being supplied to the gas static mixer 3. The second check valve 22 prevents backflow of inert gas in the gas static mixer 3. The second on-site pressure gauge 24 facilitates monitoring of the nitrogen pressure in the nitrogen pipeline system 2.

[0028] Finally, the inerting gas pipeline system 4 is preferably further provided with a third manual shut-off valve 41 and a third on-site pressure gauge 42. More preferably, the oxygen content analyzer 43, the third manual shut-off valve 41, and the third on-site pressure gauge 42 are sequentially connected in series on the inerting gas pipeline system 4. The third manual shut-off valve 41 can be used to manually shut off the inerting gas pipeline system 4 to prevent the supply of inerting gas to the styrene storage tank. The third on-site pressure gauge 42 facilitates monitoring of the inerting gas pressure in the inerting gas pipeline system 4.

[0029] In the inert gas preparation device for a styrene storage tank of the present invention, air and nitrogen are introduced into a gas static mixer 3 via an air piping system 1 and a nitrogen piping system 2, respectively, where they are thoroughly mixed to form the inert gas. The oxygen content of the inert gas is monitored online by an oxygen content analyzer 43, and interlocking control is implemented with the first and second pneumatic control valves 13 and 23 to maintain the oxygen content within a range of 3% to 8%, thereby producing inert gas that meets the requirements. Furthermore, the inert gas preparation device for a styrene storage tank of the present invention utilizes common, small-sized equipment, offering advantages such as a simple structure, compact size, and easy operation, significantly reducing production costs and floor space.

[0030] The above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention may be implemented. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. This list of all possible embodiments is not exhaustive. Any obvious variations or modifications arising from the technical solution of the present invention remain within the scope of protection of the present invention.

Claims

1. An inert gas preparation device for a styrene storage tank, comprising an air piping system (1), a nitrogen piping system (2), a gas static mixer (3) and an inert gas piping system (4), wherein the air piping system (1) and the nitrogen piping system (2) are respectively connected to the air inlet and the nitrogen inlet of the gas static mixer (3), and the inert gas piping system (4) is connected to the gas outlet of the gas static mixer (3), characterized in that: The invention also includes a control system (5), wherein the air pipeline system (1) is provided with a first pneumatic regulating valve (13), the nitrogen pipeline system (2) is provided with a second pneumatic regulating valve (23), and the inerting gas pipeline system (4) is provided with an oxygen content analyzer (43). The first pneumatic regulating valve (13), the second pneumatic regulating valve (23) and the oxygen content analyzer (43) are all connected to the control system (5). The control system (5) realizes interlocking control of the first pneumatic regulating valve (13) and the second pneumatic regulating valve (23) according to the oxygen content of the inerting gas monitored online by the oxygen content analyzer (43).

2. The inert gas preparation device for the styrene storage tank according to claim 1, characterized in that: The air pipeline system (1) is also provided with a first manual shut-off valve (11), a first check valve (12) and a first on-site pressure gauge (14).

3. The inert gas preparation device for the styrene storage tank according to claim 2, characterized in that: The first manual shut-off valve (11), the first on-site pressure gauge (14), the first check valve (12) and the first pneumatic regulating valve (13) are sequentially connected in series on the air pipeline system (1).

4. The inert gas preparation device for the styrene storage tank according to claim 3, characterized in that: The nitrogen pipeline system (2) is also provided with a second manual shut-off valve (21), a second check valve (22) and a second on-site pressure gauge (24).

5. The inert gas preparation device for the styrene storage tank according to claim 4, characterized in that: The second manual shut-off valve (21), the second on-site pressure gauge (24), the second check valve (22) and the second pneumatic regulating valve (23) are sequentially connected in series on the nitrogen pipeline system (2).

6. The inert gas preparation device for the styrene storage tank according to claim 5, characterized in that: The inerting gas pipeline system (4) is further provided with a third manual shut-off valve (41) and a third on-site pressure gauge (42).

7. The inert gas preparation device for the styrene storage tank according to claim 6, characterized in that: The oxygen content analyzer (43), the third manual shut-off valve (41) and the third on-site pressure gauge (42) are sequentially connected in series on the inerting gas pipeline system (4).

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