A PTA powder high-temperature closed pipeline integrated feeding equipment and feeding process

Abstract

The present invention discloses a PTA powder high-temperature closed pipeline integrated feeding equipment and feeding process, the feeding equipment comprises a refining dryer, the refining dryer is connected to a rotary valve through a conduit, the rotary valve is respectively connected to a heat exchanger and a polyester silo through a conduit, the heat exchanger is connected to a packing silo through a conduit, the polyester silo is connected to a batching tank through a conduit, the batching tank is respectively connected to an ethylene glycol chamber and a polyester reactor through a conduit, and the ethylene glycol chamber is connected to a tank area through a conduit. The present invention integrates the shortcomings of the overly dispersed layout of various production devices, making them in the same production park, firstly, reducing production costs; secondly, improving resource utilization efficiency, effectively utilizing the surplus water, electricity and gas produced by the device, realizing resource integration, reducing production costs, and thirdly, reducing safety hazards during transportation.

Description

Technical Field

[0001] The invention relates to the technical field of chemical industry, and in particular to a PTA powder high-temperature closed pipeline integrated feeding device and a feeding process. Background Art

[0002] PTA powder is transported to the polyester unit by tank trucks, which has a long transportation distance and is not economical. In addition, the tank trucks cannot unload 100% of the powder, resulting in powder waste.

[0003] PTA powder is packed in ton bags and transported by water, which also has the disadvantage of long transportation distance. In order to ensure a continuous supply of materials during production, downstream polyester manufacturers usually need to order in advance and build warehouses to store PTA powder. The dock unloading and feeding require crane operators, who are responsible for the PTA warehouse manager and crane operators to transport the powder to the warehouse and polyester device, and then the feeding operators will feed the powder. This has high investment and labor costs, and the operation of cranes within the factory also poses certain safety risks.

[0004] Polyester plants with large production capacity operate continuously except during shutdown and maintenance, and usually require multiple feeders. As we all know, excessive inhalation of PTA dust will affect health, and when the concentration in the air reaches a certain level, it will explode, posing certain safety risks. In summary, transporting ton bags to polyester plants for production not only increases labor costs, but also poses certain safety risks and is detrimental to the lives and health of employees.

[0005] In summary, the market currently needs an integrated device that does not require cooling or transportation of PTA powder and can directly deliver it to the polyester device by air delivery through a closed pipeline. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a PTA powder high-temperature closed pipeline integrated feeding equipment and feeding process.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a PTA powder high-temperature closed pipeline integrated feeding equipment, including a refining dryer, the refining dryer is connected to a rotary valve through a conduit, the rotary valve is respectively connected to a heat exchanger and a polyester silo through a conduit, the heat exchanger is connected to a packaging silo through a conduit, the polyester silo is connected to a batching tank through a conduit, the batching tank is respectively connected to an ethylene glycol chamber and a polyester reactor through a conduit, and the ethylene glycol chamber is connected to a tank area through a conduit.

[0008] As a further description of the above technical solution:

[0009] The refining dryer is fixedly connected with a first air inlet pipe, and the rotary valve is fixedly connected with a second air inlet pipe.

[0010] As a further description of the above technical solution:

[0011] There are three packaging silos, and all three packaging silos are equipped with a weighing system.

[0012] As a further description of the above technical solution:

[0013] A conduit is provided between one of the packaging silos and the polyester silo for gas transportation, and a transmission track is provided between the other two packaging silos and the polyester silos.

[0014] As a further description of the above technical solution:

[0015] The heat exchanger uses a water circulation method to adjust the temperature.

[0016] As a further description of the above technical solution:

[0017] The first air inlet pipe is used for introducing purified terephthalic acid, and the second air inlet pipe is used for introducing nitrogen.

[0018] The present invention also provides a PTA powder high-temperature sealed pipeline integrated feeding process, and adopts the PTA powder high-temperature sealed pipeline integrated feeding equipment to feed the PTA powder.

[0019] The present invention has the following beneficial effects:

[0020] 1. Compared with the existing technology, the integrated feeding equipment of PTA powder high temperature sealed pipeline integrates the shortcomings of the overly dispersed layout of various production devices, making them in the same production park, firstly, reducing production costs; secondly, improving resource utilization efficiency, effectively utilizing the surplus water, electricity and gas produced by the device, and realizing resource integration. PTA products are not cooled down or transported, but are directly sent to the polyester device by air delivery through a sealed pipeline, which can effectively control costs, reduce PTA production energy consumption, and create better economic benefits for enterprises.

[0021] 2. Compared with the prior art, the PTA powder high-temperature closed pipeline integrated feeding equipment avoids the risk of explosion of PTA powder during transportation, and the occurrence of physical harm caused by inhalation by the transporters during the transfer process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a PTA powder high-temperature closed pipeline integrated feeding equipment proposed by the present invention.

[0023] Legend:

[0024] 1. Refining dryer; 2. Rotary valve; 3. Heat exchanger; 4. Packing silo; 5. Batching tank; 6. Ethylene glycol room; 7. Tank area; 8. Polyester silo; 9. Polyester reactor; 10. First air inlet pipe; 11. Second air inlet pipe; 12. Conduit. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Reference Figure 1 The present invention provides a PTA powder high-temperature closed pipeline integrated feeding equipment, including a refining dryer 1, the refining dryer 1 is connected to a rotary valve 2 through a conduit 12, the rotary valve 2 is respectively connected to a heat exchanger 3 and a polyester silo 8 through the conduit 12, the heat exchanger 3 is connected to a packaging silo 4 through the conduit 12, the polyester silo 8 is connected to a batching tank 5 through the conduit 12, the batching tank 5 is respectively connected to an ethylene glycol chamber 6 and a polyester reactor 9 through the conduit 12, and the ethylene glycol chamber 6 is connected to a tank area 7 through the conduit 12.

[0027] The refining dryer 1 is fixedly connected with a first air inlet pipe 10 , and the rotary valve 2 is fixedly connected with a second air inlet pipe 11 .

[0028] There are three packing silos 4, all of which are equipped with weighing systems. The temperature of the purified terephthalic acid packing silo 4 is designed to be raised to X, the normal temperature is controlled at Y, and the maximum temperature is controlled at Z. The design capacity is M, and the single silo residence time is N hours. There are three packing silos 4, numbered F-2000A / B / C, one of which is designed as a hot silo, and an overall insulation design is required to maintain the normal temperature of the powder. The three silos are equipped with weighing systems for detecting the output in preparation for switching the functions of different silos. A conduit 12 is used for gas transportation between one of the packing silos 4 and the polyester silo 8, and a transmission track is set between the other two packing silos 4 and the polyester silo 8. A tank car, a packing system and an air delivery system are designed at the unloading end of the hot silo. The air delivery system directly delivers the high-temperature PTA powder into the polyester silo 8, and the tank car and the packing system are transmitted through the transmission track. The design of this system is to deliver the high-temperature PTA powder directly into the polyester silo 8 without cooling, and then enter the polyester reactor 9 from the polyester silo 8. The batching tank 5 is mixed with ethylene glycol. The mixed material needs to be heated to a temperature close to the reaction temperature by the heat exchanger 3 before entering the polyester reactor 9 for reaction. The temperature of ethylene glycol is designed to be room temperature, and the temperature of PTA powder is high. The two are mixed and heated to save heat source.

[0029] The heat exchanger 3 uses a water circulation method to adjust the temperature, and the water circulation method of temperature adjustment is more efficient and safe.

[0030] The first air inlet pipe 10 is used to introduce purified terephthalic acid, and the second air inlet pipe 11 is used to introduce nitrogen.

[0031] Working principle: PTA powder enters rotary valve 2 from refining dryer 1, nitrogen enters from rotary valve 2 to react with PTA powder, and then is sent to hot material bin through air delivery system. Temperature control can be adjusted by adjusting the amount of circulating water in heat exchanger 3 to ensure that the temperature sent to hot material bin is between Y and Z. Due to the large capacity of the bin and the long retention time of powder, the temperature is controlled between F and Z.

[0032] Then, the material flows in direction 1: from the refining dryer 1, it enters the rotary valve 2, enters the packaging silo 4, then enters the polyester silo 8, and finally enters the batching tank 5; the material flows in direction 2: from the refining dryer 1, it enters the rotary valve 2, then enters the polyester silo 8, and finally enters the batching tank 5. The temperature control of this material flow direction is still adjusted by adjusting the amount of circulating water in the heat exchanger 3.

[0033] The present invention also provides a PTA powder high-temperature sealed pipeline integrated feeding process, and adopts the PTA powder high-temperature sealed pipeline integrated feeding equipment to feed the PTA powder.

[0034] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0035] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PTA powder high temperature closed pipeline integrated feeding equipment, comprising a refining dryer (1), characterized in that: The refining dryer (1) is connected to a rotary valve (2) via a conduit (12); the rotary valve (2) is respectively connected to a heat exchanger (3) and a polyester silo (8) via a conduit (12); the heat exchanger (3) is connected to a packing silo (4) via a conduit (12); the polyester silo (8) is connected to a batching tank (5) via a conduit (12); the batching tank (5) is respectively connected to an ethylene glycol chamber (6) and a polyester reactor (9) via a conduit (12); and the ethylene glycol chamber (6) is connected to a tank area (7) via a conduit (12); The refining dryer (1) is fixedly connected to a first air inlet pipe (10), and the rotary valve (2) is fixedly connected to a second air inlet pipe (11); The three packaging silos (4) are provided, and the three packaging silos (4) are all equipped with a weighing system; One of the packaging silos (4) is designed as a hot material silo and needs to be designed with overall thermal insulation to maintain the normal temperature of the powder; Gas is transported between one of the packaging silos (4) and the polyester silo (8) via a conduit (12), and transmission tracks are provided between the other two packaging silos (4) and the polyester silos (8).

2. A PTA powder high temperature closed pipeline integrated feeding equipment according to claim 1, characterized in that: The heat exchanger (3) uses a water circulation method to adjust the temperature.

3. A PTA powder high temperature closed pipeline integrated feeding equipment according to claim 2, characterized in that: The first air inlet pipe (10) is used for introducing purified terephthalic acid, and the second air inlet pipe (11) is used for introducing nitrogen.

4. A PTA powder high temperature closed pipeline integrated feeding process, characterized in that: The PTA powder is fed by using a PTA powder high-temperature closed pipeline integrated feeding device as described in any one of claims 1 to 3.

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