Automatic negative-pressure dust recovery device for polyester PTA (pure terephthalic acid) feeding port

Abstract

The utility model relates to the technical field of polyester production feeding, and discloses a polyester PTA feeding port dust automatic negative pressure recovery device which comprises a small PTA stock bin, four PTA feeding ports are arranged above the small PTA stock bin, a hand hole door is arranged on the side face of each PTA feeding port, a PTA hopper is arranged below the feeding ports, and the PTA feeding ports are communicated with the hand hole door. And a PTA receiving hopper is arranged on the peripheries of the four feeding ports, a dust remover is fixedly installed above the small PTA stock bin, a cloth bag nitrogen dust removal electromagnetic valve is fixedly installed on the side face of the dust remover, and a dust removal fan is fixedly installed above the dust remover. According to the automatic negative-pressure dust recovery device for the polyester PTA feeding port, the PTA hopper and the PTA receiving hopper are arranged to recover PTA dust, compared with the prior art, falling PTA powder is recycled, resource waste is avoided, energy is saved, consumption is reduced, and meanwhile harm of the PTA dust to the working environment and personnel health is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester production feeding, in particular to an automatic negative pressure dust recovery device at a polyester PTA feeding port. Background Art

[0002] In the polyester production process, PTA (terephthalic acid) is one of the important raw materials. It is a combustible white powder, a low-toxic chemical, and irritating to the skin. At present, the PTA feeding system is generally composed of a PTA feeding port, a hopper, and a dust removal device. After the PTA raw material is delivered to the company's workshop, it is sent to the PTA warehouse by a forklift, and then the feeding personnel use an electric hoist to lift the PTA ton bag to the top of the feeding port. There is a hand hole door on one side of the hopper. The feeding personnel open the hand hole door, untie the knot at the bottom of the PTA ton bag, close the hand hole door, and the PTA powder falls into the hopper and goes to the PTA conveyor chain plate, and finally enters the PTA daily silo.

[0003] However, in this process, since the hand hole door is a push-pull type, each time the PTA powder is fed, some of it will squeeze into the gap of the warehouse door. When the hand hole door is opened next time to untie the knot of the PTA bag, the PTA powder will fall directly to the ground. The only way is to manually clean the PTA on the feeding port equipment and on the ground and pour it into the PTA recovery barrel as hazardous waste. It cannot be used again, resulting in a waste of resources. At the same time, it will make the ground slippery, affecting the safety of the feeding personnel. The PTA dust in the air will further endanger the health of the feeding personnel. Therefore, it is necessary to solve the problem of PTA on the ground generated during the feeding process, which causes waste of resources and health and safety of personnel. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an automatic negative pressure dust recovery device for a polyester PTA feeding port.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic negative pressure dust recovery device for a polyester PTA feeding port, comprising a small PTA silo, a PTA feeding port is arranged above the small PTA silo, the number of the PTA feeding ports is four, a hand hole door is arranged on the side of the PTA feeding port, a PTA hopper is arranged below the PTA feeding port, and a PTA receiving hopper is arranged around the periphery of the four PTA feeding ports, a dust collector is fixedly installed above the small PTA silo, a bag nitrogen dust removal solenoid valve is fixedly installed on the side of the dust collector, and a dust removal fan is fixedly installed above the dust collector.

[0006] Preferably, the PTA hopper comprises a steel plate and a rubber pad, and the steel plate is made of stainless steel.

[0007] Preferably, the steel plate of the PTA hopper is fixedly connected to the PTA feeding port by laser argon arc welding. The stainless steel plate of the PTA hopper is vertically combined and welded to each PTA feeding port by extending outward for a certain distance around the PTA feeding port, and the welded outer periphery is then connected to the bottom of each PTA feeding port and welded together.

[0008] Preferably, the steel plate of the handhole door directly opposite to the PTA hopper is fixedly connected to the rubber pad, holes are provided at positions corresponding to the steel plate and the rubber pad and are fixed by stainless steel bolts to prevent the feeding personnel from being squeezed and injured by the front steel plate when opening and closing the handhole door.

[0009] Preferably, the PTA hopper has a certain taper.

[0010] Preferably, the PTA hopper collecting port is the lowest point, the PTA hopper collecting port is closest to the PTA receiving hopper, the angle between the lowest point of the PTA hopper and the farthest vertex of the diagonal PTA feeding port and the ground is 20-70°, the angle between the lowest point of the PTA hopper and the nearest vertex of the PTA feeding port directly above and the ground is 75-95°, and the angle between the lowest point of the PTA hopper and the vertex of the PTA feeding port perpendicular to the diagonal line and the ground is 25-35°.

[0011] Preferably, the PTA receiving bucket includes a steel pipe, an elbow and a suction solenoid valve, the steel pipe and the elbow are both made of stainless steel, and the elbow angle is 30-60°.

[0012] Preferably, one end of the steel pipe is connected to the PTA hopper collecting port, the elbow is fixedly connected to the steel pipe, the suction solenoid valve is fixedly connected to the steel pipe, and the other end of the steel pipe is connected to the dust collector.

[0013] Compared with the prior art, the utility model provides an automatic negative pressure dust recovery device for polyester PTA feeding port, which has the following beneficial effects:

[0014] The utility model recycles PTA dust by arranging a PTA hopper and a PTA receiving hopper. Compared with the original technology, the PTA powder on the ground can be recycled, thus avoiding waste of resources, saving energy and reducing consumption, and reducing the harm of PTA dust to the working environment and personnel health. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] In the figure: 1. PTA small silo; 2. PTA feeding port; 3. Hand hole door; 4. Rubber pad; 5. PTA hopper; 6. PTA receiving hopper; 7. Suction solenoid valve; 8. Dust collector; 9. Bag nitrogen dust removal solenoid valve; 10. Dust removal fan. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Example 1

[0020] like Figure 1 As shown, the utility model provides an automatic negative pressure dust recovery device for a polyester PTA feeding port, comprising a small PTA silo 1, a PTA feeding port 2 is arranged above the small PTA silo 1, the number of the PTA feeding ports 2 is four, a hand hole door 3 is arranged on the side of the PTA feeding port 2, a PTA hopper 5 is arranged below the PTA feeding port 2, a PTA receiving hopper 6 is arranged on the periphery of the four PTA feeding ports 2, a dust collector 8 is fixedly installed above the small PTA silo 1, a bag nitrogen dust removal solenoid valve 9 is fixedly installed on the side of the dust collector 8, and a dust removal fan 10 is fixedly installed above the dust collector 8.

[0021] The PTA hopper 5 comprises a steel plate and a rubber pad 4, wherein the steel plate is made of stainless steel.

[0022] The steel plate of the PTA hopper 5 is fixedly connected to the PTA feeding port 2 by laser argon arc welding. The stainless steel plate of the PTA hopper 5 is vertically combined and welded to each PTA feeding port 2 by extending outward for a certain distance around it. The welded outer periphery is then connected to the bottom of each PTA feeding port 2 and welded together.

[0023] The steel plate of the hand hole door 3 of the PTA hopper 5 is fixedly connected to the rubber pad 4. Holes are provided at positions corresponding to the steel plate and the rubber pad 4 and fixed by stainless steel bolts to prevent the front steel plate from squeezing the body and causing injury when the feeding personnel open and close the hand hole door.

[0024] The PTA hopper 5 has a certain taper.

[0025] The collecting port of the PTA hopper 5 is the lowest point, and the collecting port of the PTA hopper 5 is closest to the PTA receiving hopper 6. The angle between the lowest point of the PTA hopper 5 and the farthest vertex of the diagonal PTA feeding port 2 and the ground is 20-70°, the angle between the lowest point of the PTA hopper 5 and the nearest vertex of the PTA feeding port 2 directly above and the ground is 75-95°, and the angle between the lowest point of the PTA hopper 5 and the vertex of the PTA feeding port 2 perpendicular to the diagonal line and the ground is 25-35°.

[0026] The PTA receiving bucket 6 comprises a steel pipe, an elbow and a suction solenoid valve 7. The steel pipe and the elbow are both made of stainless steel, and the elbow angle is 30-60°.

[0027] One end of the steel pipe is connected to the collecting port of the PTA hopper 5, the elbow is fixedly connected to the steel pipe, the suction solenoid valve 7 is fixedly connected to the steel pipe, and the other end of the steel pipe is connected to the dust collector 8.

[0028] In this embodiment, PTA dust is recovered by setting up a PTA hopper 5 and a PTA receiving hopper 6. Compared with the original technology, the ground PTA powder can be recycled, avoiding waste of resources, saving energy and reducing consumption, and reducing the harm of PTA dust to the working environment and personnel health.

[0029] The following is a detailed description of the working principle of the automatic negative pressure dust recovery device at the polyester PTA feeding port.

[0030] like Figure 1As shown, a PTA hopper 5 is made around the PTA feeding port 2, and a stainless steel plate is welded and fixed to four PTA feeding ports 2 by laser argon arc welding to form a tapered PTA hopper 5. A rubber pad 4 is installed on the steel plate in front of the hand hole door 3 of each PTA feeding port 2 to protect the feeding personnel from being squeezed by the stainless steel plate during operation. The prepared PTA hopper 5 can collect the PTA that is scattered and dropped when the PTA feeding port 2 is fed and shaken, and can also collect the PTA that overflows from the gap of the hand hole door 3 of the PTA feeding port 2. The PTA hopper 5 has a taper, and the PTA will be gathered to the lowest point of the collection port of the PTA hopper 5 under the action of gravity. The collecting port is connected to the venting dust collector 8 of the PTA small silo 1 through a stainless steel pipe. Because there is negative pressure inside the dust collector 8, the PTA powder in the PTA hopper 5 can be smoothly sucked into the small silo. The working principle of the dust collector 8 is: when the bag nitrogen dust removal solenoid valve 9 of the dust collector 8 is opened and the bag is beaten, the suction solenoid valve 7 is closed; when the bag nitrogen dust removal solenoid valve 9 of the dust collector 8 is closed and the bag is beaten, the suction solenoid valve 7 is opened to suck the material through negative pressure, and the feeding valve below the PTA feeding port 2 is closed and the suction solenoid valve 7 is closed. Such a PTA collection and operation method not only protects the health and working environment of the feeding personnel, but also realizes resource recycling, energy saving and consumption reduction, and creates certain value.

[0031] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A polyester PTA feeding port dust automatic negative pressure recovery device, characterized by: It comprises a small PTA silo, a PTA feeding port is arranged above the small PTA silo, the number of the PTA feeding ports is four, a hand hole door is arranged on the side of the PTA feeding port, a PTA hopper is arranged below the PTA feeding port, a PTA receiving hopper is arranged around the periphery of the four PTA feeding ports, and a dust collector is fixedly installed above the small PTA silo.

2. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 1 is characterized in that: A bag nitrogen dust removal solenoid valve is fixedly installed on the side of the dust collector, and a dust removal fan is fixedly installed on the top of the dust collector.

3. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 2 is characterized in that: The PTA hopper comprises a steel plate and a rubber pad, and the steel plate is made of stainless steel.

4. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 3 is characterized in that: The steel plate of the PTA hopper is fixedly connected to the PTA feeding port by laser argon arc welding.

5. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 4 is characterized in that: The steel plate of the hand hole door of the PTA hopper is fixedly connected to the rubber pad, and holes are provided at positions corresponding to the steel plate and the rubber pad and are fixed by stainless steel bolts.

6. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 5 is characterized in that: The PTA hopper has a certain taper.

7. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 1 is characterized by: The PTA hopper collecting port is the lowest point, and the PTA hopper collecting port is closest to the PTA receiving hopper.

8. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 1 is characterized by: The PTA receiving bucket comprises a steel pipe, an elbow and a suction solenoid valve, and the steel pipe and the elbow are both made of stainless steel.

9. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 8, characterized in that: One end of the steel pipe is connected to the PTA hopper collecting port, and the elbow is fixedly connected to the steel pipe.

10. The automatic negative pressure dust recovery device for polyester PTA feeding port according to claim 9, characterized in that: The material suction solenoid valve is fixedly connected to the steel pipe, and the other end of the steel pipe is connected to the dust collector.

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