PTA stock bin

Abstract

The utility model discloses a PTA stock bin which comprises a bin body, a feeding system, an air inlet system, a filter and a breather valve are respectively arranged at the top end of the bin body, a discharging pipe is arranged at the bottom of the bin body, a weighing instrument is arranged on one side of the bottom of the bin body, the feeding system comprises a feeding pipe, a feeding control valve is arranged on the feeding pipe, and a discharging control valve is arranged on the feeding control valve. The air inlet system comprises an air duct, and an online oxygen content detection instrument and an air inlet control valve are arranged on the air duct. Due to the fact that inert gas is used for inerting the stock bin, the inert gas is automatically supplemented when the pressure of the stock bin is low, the breather valve is arranged, and the weighing instrument is used for controlling the weight of the stock bin, a good effect is achieved in practical application, safety and high efficiency of the stock bin are greatly improved, and great significance is achieved for safe production of factories.

Description

Technical Field

[0001] This utility model belongs to the field of PTA silo technology, and in particular relates to a PTA silo. Background Technology

[0002] PTA, short for purified terephthalic acid, is a fundamental product in the chemical fiber industry chain, widely used in chemical fibers, light industry, electronics, construction, and other fields. PTA silos are primarily used to store dried PTA finished products in bulk and are one of the key pieces of equipment in PTA plants.

[0003] When PTA powder is fed into the silo, a large amount of gas also enters the silo. If it cannot be discharged in time, the gas will continue to accumulate in the silo, causing the pressure inside the silo to rise continuously. When the pressure inside the silo exceeds its design value, there is a risk of strength failure. Utility Model Content

[0004] The purpose of this invention is to provide a PTA silo to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A PTA silo includes a silo body. The top of the silo body is respectively provided with a feeding system, an air intake system, a filter, and a breather valve. The bottom of the silo body is provided with a discharge pipe, and a weighing instrument is provided on one side of the bottom of the silo body. The feeding system includes a feeding pipe, and a feeding control valve is provided on the feeding pipe. The air intake system includes an air venting pipe, and an online oxygen content detection instrument and an air intake control valve are respectively provided on the air venting pipe.

[0006] Preferably, a feeding control valve is provided on the feeding pipe.

[0007] Preferably, a control module is provided on the side wall of the silo body, and the control module is electrically connected to the feed control valve, the air intake control valve, the online oxygen content detection instrument, the discharge control valve and the weighing instrument.

[0008] Preferably, the filter includes a housing, a filter bag is disposed inside the housing, the inlet of the housing is connected to the gas phase space at the top of the interior of the chamber, and the outlet extends to the top of the chamber.

[0009] Preferably, the breathing valve consists of an exhalation valve and an inhalation valve.

[0010] Preferably, the control module is equipped with an alarm module.

[0011] The PTA silo of this utility model has the following advantages:

[0012] This utility model has achieved good results in practical applications by proposing the use of inert gas to inertize the silo, automatically replenishing inert gas when the silo pressure is low, setting up a breather valve, and using a weighing instrument to control the silo weight. It has greatly improved the safety and efficiency of the silo and is of great significance to the safe production of the factory. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] The markings in the diagram are as follows: 1. Bin body; 2. Feed pipe; 3. Feed control valve; 4. Ventilation pipe; 5. Air intake control valve; 6. Online oxygen content detector; 7. Filter; 8. Breathing valve; 9. Control module; 10. Discharge pipe; 11. Discharge control valve; 12. Weighing instrument. Detailed Implementation

[0016] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0017] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0020] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0021] To better understand the purpose, structure, and function of this utility model, a PTA silo of this utility model will be described in further detail below with reference to the accompanying drawings.

[0022] like Figure 1As shown, this utility model discloses a PTA silo, including a silo body 1. The top of the silo body 1 is equipped with a feeding system, an air intake system, a filter 7, and a breather valve 8. The bottom of the silo body 1 is equipped with a discharge pipe 10, on which a discharge control valve 11 is installed. A weighing instrument 12 is installed on one side of the bottom of the silo body 1. The weighing instrument is used as a monitoring instrument for the PTA weight, monitoring the silo load in real time and transmitting the monitoring data to a control module. The control module sets two silo weight control points. When the silo weight reaches the set value, the control system alarms and interlocks related equipment actions. For example, if two control points are set for the silo weight, namely H4900t (high weight) and HH5100t (high-high weight), when the silo weight reaches 4900t, the control module alarms, prompting the operator to close the silo feed control valve 3 and switch the PTA finished product to another silo for feeding. When the silo weight reaches 5100t, the control module alarms and triggers an interlock, quickly closing the rotary feed valve in the PTA finished product conveyor line to stop feeding and prevent silo overload. The feeding system includes a feed pipe 2, on which a feed control valve 3 is installed. The air intake system includes an air duct 4, on which an online oxygen content detector 6 and an air intake control valve 5 are installed. The gas introduced into the air intake system is an inert gas, such as nitrogen. The online oxygen content detector 6 monitors the oxygen content in the conveying gas in real time and transmits the data to the control module. Once the oxygen content in the conveying gas exceeds the control value, the control module will issue an alarm and immediately close the air intake control valve 5 and the feed control valve 3 to prevent the oxygen content in the silo 1 from rising to a level exceeding the safety value, which could lead to combustion or explosion. A control module 9 is installed on the side wall of the silo 1. The control module 9 is electrically connected to the feed control valve 3, the air intake control valve 5, the online oxygen content detector 6, the discharge control valve 11, and the weighing instrument 12. The control module 9 is equipped with an alarm module.

[0023] The filter 7 includes a housing containing a filter bag. The inlet of the housing is connected to the gas phase space at the top of the silo 1, and the outlet extends to the top of the silo 1. The filter bag allows gas to pass through while filtering out dust particles. Thus, the conveying gas entering the silo 1 continuously passes through the filter 7 and is discharged into the atmosphere, leaving the PTA powder in the conveying gas within the silo 1, stabilizing the pressure inside the silo 1 within the design pressure. The breather valve 8 consists of an exhalation valve and an inhalation valve, serving as an emergency measure for depressurizing the silo 1. The breather valve is a commonly used pressure protection measure for silos. When the internal or external pressure of the silo 1 reaches the set pressure of the breather valve 8, the breather valve 8 opens to expel or inhale air. Therefore, the breather valve 8 simultaneously prevents internal pressure overpressure and external pressure instability.

[0024] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A PTA silo characterized by: The application relates to a feed bin, which comprises a bin body (1), a feed inlet system, an air inlet system, a filter (7) and a breathing valve (8) arranged at the top end of the bin body (1) respectively, a discharge pipe (10) arranged at the bottom of the bin body (1), and a weighing instrument (12) arranged at one side of the bottom of the bin body (1). The feed inlet system comprises a feed inlet pipe (2) provided with a feed inlet control valve (3). The air inlet system comprises an air inlet pipeline (4) provided with an on-line oxygen content detection instrument (6) and an air inlet control valve (5) respectively.

2. A PTA silo according to claim 1, characterized in that: The discharge pipe (10) is provided with a discharge control valve (11).

3. A PTA silo according to claim 2, characterized in that: The sidewall of the bin body (1) is provided with a control module (9) electrically connected with the feed inlet control valve (3), the air inlet control valve (5), the on-line oxygen content detection instrument (6), the discharge control valve (11) and the weighing instrument (12) respectively.

4. A PTA silo according to claim 1, characterized in that: The filter (7) comprises a shell provided with a filter bag, the inlet of the shell is connected with the gas phase space at the top end of the bin body (1), and the outlet extends to the upper side of the bin body (1).

5. A PTA silo according to claim 1, characterized in that: The breathing valve (8) is composed of an exhalation valve and an inhalation valve.

6. A PTA silo according to claim 3, characterized in that: The control module (9) is provided with an alarm module.

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