CN219606756U - Spandex PTMG storage tank nitrogen pressure adjusting system - Google Patents

Abstract

The utility model provides a nitrogen pressure regulating system of a spandex PTMG storage tank, which comprises a nitrogen source, an air inlet main pipe, a first air inlet branch pipe, a second air inlet branch pipe, a first PTMG storage tank, a second PTMG storage tank, an electric regulating valve, a pressure transmitter and a control system, wherein the nitrogen source is connected with the air inlet main pipe, the middle part of the air inlet main pipe is connected to the top of the first PTMG storage tank through the first air inlet branch pipe, and the tail end of the air inlet main pipe is connected to the top of the second PTMG storage tank through the second air inlet branch pipe; the electric regulating valve is arranged at the air inlet end of the main air inlet pipeline, the pressure transmitter is arranged at the top of the first PTMG storage tank or the second PTMG storage tank, and the control system is electrically connected with the electric regulating valve and the pressure transmitter. The utility model can timely and accurately monitor and adjust the nitrogen pressure in real time, ensure that the PTG storage tank pressure is constant and the liquid level is stable, ensure that the product conveying and metering are more accurate, and ensure the production to be stable.

Description

Spandex PTMG storage tank nitrogen pressure adjusting system

[ field of technology ]

The utility model relates to a nitrogen pressure regulating system of a spandex PTMG storage tank.

[ background Art ]

Because of the large consumption of PTMG (polytetramethylene ether glycol) which is a main production raw material of spandex, large storage tanks are generally used for storage in a production factory. In order to prevent oxidative deterioration of PTMG (polytetramethylene ether glycol), nitrogen protection is required, and thus the tank needs to be well airtight. The nitrogen pressure regulating system is additionally arranged on the top of the existing storage tank to be matched with the pressure in the storage tank, when the pressure in the storage tank is increased, the breather valve is ejected out to release a part of pressure, and when the pressure in the storage tank is reduced, the nitrogen pressure regulating system fills nitrogen into the storage tank to ensure the pressure.

At present, the nitrogen pressure regulating device of the spandex PTMG storage tank is characterized in that a self-operated pressure regulating valve is directly arranged on the top of each storage tank, and the problems of low equipment pressure regulating speed, reaction lag, unstable pressure and high failure rate are found in use, so that the PTG storage tank has large pressure fluctuation and high abnormal alarm frequency; in addition, the external pressure regulating valve has high fault rate, and is arranged at the top of an outdoor PTMG storage tank, the tank body 15m is high, and particularly, the emergency pressure regulating valve has great potential safety hazard to maintenance personnel during night or bad weather.

[ utility model ]

The technical problem to be solved by the utility model is to provide the nitrogen pressure regulating system of the spandex PTMG storage tank, which can timely and accurately monitor and regulate the nitrogen pressure in real time, ensure that the PTG storage tank has constant pressure and stable liquid level, ensure that the product conveying and metering are more accurate, ensure the production to be stable, and simultaneously has reasonable equipment installation position and convenient maintenance.

The utility model is realized in the following way:

the nitrogen pressure regulating system of the spandex PTMG storage tank comprises a nitrogen source, an air inlet main pipe, a first air inlet branch pipe, a second air inlet branch pipe, a first PTMG storage tank, a second PTMG storage tank, an electric regulating valve, a pressure transmitter and a control system, wherein the nitrogen source is connected with the air inlet main pipe, the middle part of the air inlet main pipe is connected to the top of the first PTMG storage tank through the first air inlet branch pipe, and the tail end of the air inlet main pipe is connected to the top of the second PTMG storage tank through the second air inlet branch pipe;

the electric regulating valve is arranged at the air inlet end of the main air inlet pipeline, the pressure transmitter is arranged at the top of the first PTMG storage tank or the second PTMG storage tank, and the control system is electrically connected with the electric regulating valve and the pressure transmitter.

The utility model has the advantages that:

according to the utility model, only one electric regulating valve and one pressure transmitter are adopted to control the nitrogen pressure of the whole set of multiple PTMG storage tanks, so that the equipment cost can be saved; the nitrogen pressure of the PTMG storage tank can be monitored in real time, and the nitrogen pressure is regulated in real time, so that the nitrogen pressure is timely and accurately regulated, and the pressure of the PTG storage tank is stable, fluctuation is reduced, and an alarm is given; the utility model has less equipment and high stability, and the electric regulating valve is arranged at the air inlet of the main air inlet pipeline, so that ascending treatment is not needed, and maintenance personnel can conveniently overhaul. In a word, the utility model ensures that the PTG storage tank has constant pressure and stable liquid level, ensures that the product conveying and metering are more accurate, and ensures stable production.

[ description of the drawings ]

The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a nitrogen pressure regulating system of a spandex PTMG storage tank according to the present utility model.

Fig. 2 is a circuit diagram of a nitrogen pressure regulating system of a spandex PTMG tank according to the present utility model.

The numbering in the figures is as follows:

1. nitrogen source, 2, inlet main pipe, 3, first inlet branch pipe, 4, second inlet branch pipe, 5, first PTMG storage tank, 6, second PTMG storage tank, 7, electric control valve, 8, pressure transmitter, 9, control system.

[ detailed description ] of the utility model

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and detailed description. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 2, the nitrogen pressure regulating system of the spandex PTMG storage tank of the present utility model includes a nitrogen source 1, an air inlet main pipe 2, a first air inlet branch pipe 3, a second air inlet branch pipe 4, a first PTMG storage tank 5, a second PTMG storage tank 6, an electric regulating valve 7, a pressure transmitter 8 and a control system 9, wherein the nitrogen source 1 is connected with the air inlet main pipe 2, the middle part of the air inlet main pipe 2 is connected to the top of the first PTMG storage tank 5 through the first air inlet branch pipe 3, and the tail end of the air inlet main pipe 2 is connected to the top of the second PTMG storage tank 6 through the second air inlet branch pipe 4;

the electric control valve 7 is arranged at the air inlet end of the main air inlet pipeline 2, the pressure transmitter 8 is arranged at the top of one of the first PTMG storage tank 5 or the second PTMG storage tank 6, and the control system 9 is electrically connected with the electric control valve 7 and the pressure transmitter 8.

In another embodiment of the present utility model, said nitrogen gas source 1 supplies nitrogen gas to said first PTMG storage tank 5 and said second PTMG storage tank 6 through said main inlet pipe 2, said first inlet branch pipe 3 and said second inlet branch pipe 4; the pressure transmitter 8 detects the pressure in the PTMG storage tank in real time and transmits the pressure to the control system 9, and the control system 9 controls the opening and closing of the electric regulating valve 7 and the pressure relief according to the pressure information.

Because the electric regulating valve 7 is arranged at the air inlet end of the main air inlet pipeline 2, that is, the electric regulating valve 7 is arranged at the main air inlet pipeline 2 before the first air inlet branch pipe 3, and other parts are separated without valves, so that a communicated air pressure balanced environment is formed among the main air inlet pipeline 2 part, the second air inlet branch pipe 4 and the second PTMG storage tank 6 among the first PTMG storage tank 5, the first air inlet branch pipe 3 and the second air inlet branch pipe 4, and therefore, only the pressure transmitter 8 is required to be arranged on one PTMG storage tank.

In conclusion, the utility model can control the nitrogen pressure of the whole set of a plurality of PTMG storage tanks by only adopting one electric regulating valve and one pressure transmitter, and can save equipment cost; the nitrogen pressure of the PTMG storage tank can be monitored in real time, and the nitrogen pressure is regulated in real time, so that the nitrogen pressure is timely and accurately regulated, and the pressure of the PTG storage tank is stable, fluctuation is reduced, and an alarm is given; the utility model has less equipment and high stability, and the electric regulating valve is arranged at the air inlet of the main air inlet pipeline, so that ascending treatment is not needed, and maintenance personnel can conveniently overhaul. In a word, the utility model ensures that the PTG storage tank has constant pressure and stable liquid level, ensures that the product conveying and metering are more accurate, and ensures stable production.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.

Claims (1)

1. A spandex PTMG storage tank nitrogen pressure governing system which characterized in that: the system comprises a nitrogen gas source, an air inlet main pipe, a first air inlet branch pipe, a second air inlet branch pipe, a first PTMG storage tank, a second PTMG storage tank, an electric regulating valve, a pressure transmitter and a control system, wherein the nitrogen gas source is connected with the air inlet main pipe, the middle part of the air inlet main pipe is connected to the top of the first PTMG storage tank through the first air inlet branch pipe, and the tail end of the air inlet main pipe is connected to the top of the second PTMG storage tank through the second air inlet branch pipe;

the electric regulating valve is arranged at the air inlet end of the main air inlet pipeline, the pressure transmitter is arranged at the top of the first PTMG storage tank or the second PTMG storage tank, and the control system is electrically connected with the electric regulating valve and the pressure transmitter.