An overpressure interlock protects a resin discharge filtration system

Abstract

The utility model discloses a kind of overpressure interlock protection resin discharging filtering systems, powder coating resin is discharged from reaction kettle into steam jacket gear pump after reaction completion in reaction kettle, steam jacket gear pump is connected with steam hand valve by steam pipeline, steam jacket gear pump, steam jacket resin conveying pipe, steam jacket resin filter are also connected by steam pipeline between, interlock protection assembly is used between steam jacket gear pump and steam jacket resin conveying pipe;Interlock protection assembly includes pressure transmitter, pressure measurement diaphragm kit, control system and safety contactor, the pressure in steam jacket resin conveying pipe is transmitted to control system by pressure transmitter.The utility model uses overpressure interlock protection assembly, prevent steam jacket resin conveying pipe and resin filter inside overpressure;Adopt steam series connection to prevent resin solidification due to temperature drop;Instrument electrical interlock protection using pressure measurement can avoid the malady of safety valve blockage failure.

Description

Technical Field

[0001] This utility model relates to the field of resin production technology, and in particular to an overpressure interlock protection resin feeding and filtration system. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] In the field of resin production filtration, currently, when resin raw materials are input into the equipment for production, they are generally only filtered to isolate some larger impurities in the raw materials.

[0004] In traditional processes, a safety valve is used at the outlet of the gear pump for overpressure protection. However, the viscosity of powder coating resin increases significantly as the temperature decreases, and it is prone to solidification. It is difficult to take appropriate measures to maintain a high temperature for the traditional safety valve body and inlet / outlet pipelines, so the safety valve is easily blocked, leading to safety valve failure.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an overpressure interlock protection resin feeding and filtration system to address the shortcomings of the existing technology.

[0007] This application discloses an overpressure interlock protection resin feeding filtration system for filtering resin discharged from a reactor. The filtration system includes: A steam-jacketed gear pump, a steam-jacketed resin delivery pipe, and a steam-jacketed resin filter are connected in sequence. After the powder coating resin is reacted in the reactor, it is discharged from the reactor and enters the steam-jacketed gear pump. The steam-jacketed gear pump is connected to a steam hand valve through a steam pipeline. The steam-jacketed gear pump, the steam-jacketed resin delivery pipe, and the steam-jacketed resin filter are also connected through steam pipelines. An interlocking protection assembly is used between the steam-jacketed gear pump and the steam-jacketed resin delivery pipe. The interlocking protection assembly includes a pressure transmitter, a pressure measuring diaphragm kit, a control system, and a safety contactor. The pressure transmitter is installed on the steam jacketed resin delivery pipe via the pressure measuring diaphragm kit. One end of the control system is connected to the pressure transmitter, and the other end of the control system is connected to the steam jacketed gear pump via the safety contactor. The pressure inside the steam jacketed resin delivery pipe is transmitted to the control system via the pressure transmitter.

[0008] Furthermore, in the aforementioned overpressure interlock protection resin feeding and filtration system, when the pressure inside the steam jacket resin delivery pipe exceeds 0.4 MPa, the control system outputs a shutdown signal, and the control system controls the safety contactor to cut off the power supply to the steam jacket gear pump, causing the steam jacket gear pump to stop operating.

[0009] Furthermore, in the aforementioned overpressure interlock protection resin feeding filtration system, the pressure measuring diaphragm kit is connected to the steam jacket resin delivery pipe via a mounting base.

[0010] Furthermore, in the aforementioned overpressure interlock protection resin feeding filtration system, the pressure measuring diaphragm kit is model ROSEMIUNT 1199.

[0011] Furthermore, in the aforementioned overpressure interlock protection resin feeding and filtration system, the steam jacketed resin conveying pipe includes an inner pipe and an outer pipe surrounding the inner pipe.

[0012] Furthermore, in the aforementioned overpressure interlock protection resin feeding and filtration system, the steam jacket gear pump is model VIKING 4225.

[0013] Furthermore, in the aforementioned overpressure interlock protection resin feeding filtration system, the safety contactor is a Siemens SIRIUS 3RT6 SIL3 model.

[0014] Furthermore, in the aforementioned overpressure interlock protection resin feeding and filtration system, the end of the steam jacketed resin filter is connected to a steam trap via the steam pipeline.

[0015] In summary, the structure adopted in this embodiment of the present invention has the following advantages: The overpressure interlock protection resin feeding and filtration system described in this utility model employs a series-connected steam-jacketed gear pump, steam-jacketed resin delivery pipe, and steam-jacketed resin filter with continuous steam heating to prevent resin solidification due to temperature drop during delivery and filtration. To prevent excessive resin pressure in the delivery pipe and filter, an overpressure interlock protection component of SIL2 level is used. This component includes a pressure transmitter, a pressure measuring diaphragm kit, an SIS safety control system, and a safety contactor. The pressure in the steam-jacketed resin delivery pipe is transmitted to the control system via the pressure transmitter. When the pressure in the steam-jacketed resin delivery pipe exceeds 0.4 MPa, the control system shuts off. The signal control system controls the safety contactor to cut off the power supply to the steam jacket gear pump, stopping its operation to prevent overpressure inside the steam jacket resin delivery pipe and resin filter. The use of pressure measurement instrument electrical interlock protection avoids the drawbacks of safety valve blockage failure. The pressure measurement method, combining a pressure measurement diaphragm kit and a pressure transmitter, effectively prevents pressure transmitter failure caused by inlet blockage. The pressure transmitter, SIS safety control system, and safety contactor all achieve a safety integrity level of SIL2 or higher, resulting in an overall safety integrity level of SIL2. This effectively prevents overpressure in the gear pump, pipelines, and resin filter, achieving the purpose of replacing the safety valve.

[0016] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overpressure interlock protection resin feeding and filtration system in an embodiment of this utility model.

[0019] The reference numerals in the above figures are as follows: 1. Steam hand valve; 2. Steam pipeline; 3. Steam trap; 4. Steam jacketed gear pump; 5. Pressure transmitter; 6. Pressure measuring diaphragm kit; 7. Mounting base; 8. Steam jacketed resin delivery pipe; 9. Inner pipe; 10. Steam jacketed resin filter; 11. Control system; 12. Safety contactor. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0022] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0023] Reference Figure 1 As shown in the embodiment of this application, an overpressure interlock protection resin feeding filtration system is disclosed to filter resin discharged from the reactor. The filtration system includes: A steam-jacketed gear pump 4, a steam-jacketed resin delivery pipe 8, and a steam-jacketed resin filter 10 are connected in sequence. After the powder coating resin is reacted in the reactor, it is discharged from the reactor and enters the steam-jacketed gear pump 4. The steam-jacketed gear pump 4 is connected to a steam hand valve 1 through a steam pipeline 2. The steam-jacketed gear pump 4, the steam-jacketed resin delivery pipe 8, and the steam-jacketed resin filter 10 are also connected through a steam pipeline 2. An interlocking protection assembly is used between the steam-jacketed gear pump 4 and the steam-jacketed resin delivery pipe 8. The interlocking protection assembly includes a pressure transmitter 5, a pressure measuring diaphragm kit 6, a control system 11, and a safety contactor 12. The pressure transmitter 5 is installed on the steam jacket resin delivery pipe 8 via the pressure measuring diaphragm kit 6. One end of the control system 11 is connected to the pressure transmitter 5, and the other end of the control system 11 is connected to the steam jacket gear pump 4 via the safety contactor 12. The pressure in the steam jacket resin delivery pipe 8 is transmitted to the control system 11 through the pressure transmitter 5.

[0024] Specifically, in this embodiment, when the pressure inside the steam-jacketed resin delivery pipe 8 is greater than 0.4 MPa, the control system 11 outputs a shutdown signal, and the control system 11 controls the safety contactor 12 to cut off the power supply to the steam-jacketed gear pump 4, so that the steam-jacketed gear pump 4 stops running.

[0025] With the above structure, after the powder coating resin has reacted in the reactor, it is discharged from the reactor and enters the steam jacket gear pump 4 through the steam jacket discharge pipeline. After being pressurized, it enters the steam jacket resin filter 10 through the steam jacket resin delivery pipe 8 and then enters the downstream process. The powder coating resin is usually in a molten state at 180°C. When the temperature is below 140°C, the temperature drops too much and it gradually begins to solidify. To prevent the resin from solidifying, this embodiment uses a series connection of the steam jacket gear pump 4, the steam jacket resin delivery pipe 8, and the steam jacket resin filter 10 with full steam heating to prevent the resin from solidifying due to temperature drop during transportation and filtration. To prevent the resin pressure in the resin delivery pipe and the resin filter from being too high, this embodiment uses a SIL2 level overpressure interlock protection component. The overpressure interlock protection component uses a ROSEMOUNT 3051 SIL3 level pressure transmitter 5, a ROSEMOUNT 1199 pressure measurement diaphragm kit 6, an EMERSON DeltaV SIS safety control system 11, and a Siemens SIRIUS 3RT6. SIL3 safety contactor 12, the pressure in the steam jacketed resin delivery pipe 8 is transmitted to the control system 11 through the pressure transmitter 5. When the pressure in the steam jacketed resin delivery pipe 8 is greater than 0.4MPa, the control system 11 outputs a shut-off signal, and the control system 11 controls the safety contactor 12 to cut off the power supply to the steam jacketed gear pump 4, and the steam jacketed gear pump 4 stops running to prevent overpressure inside the steam jacketed resin delivery pipe 8 and the steam jacketed resin filter 10.

[0026] This embodiment uses a pressure measurement method that combines a pressure measurement diaphragm kit and a pressure transmitter, which can effectively avoid pressure transmitter failure caused by blockage at the pressure transmitter inlet. The pressure transmitter, SIS safety control system and safety contactor all reach a safety integrity level of SIL2 or higher. The overall safety integrity level can reach SIL2, which can effectively prevent overpressure of gear pumps, pipelines and resin filters, and achieve the purpose of replacing safety valves.

[0027] Specifically, in this embodiment, the pressure measuring diaphragm kit 6 is connected to the steam jacket delivery pipe via a mounting base 7. The electrical interlock protection of the pressure measuring instrument used in this embodiment avoids the drawback of safety valve blockage and failure.

[0028] Specifically, in this embodiment, the pressure measuring diaphragm kit 6 is model ROSEMIUNT 1199.

[0029] Specifically, in this embodiment, the steam-jacketed resin delivery pipe 8 includes an inner pipe 9 and an outer pipe surrounding the inner pipe 9. The mounting base 7 is connected to both the inner pipe 9 and the outer surface of the steam-jacketed resin delivery pipe 8, which can effectively trace heat and increase the temperature of the mounting base 7, thus preventing the resin in the mounting base 7 from solidifying.

[0030] Specifically, in this embodiment, the steam jacket gear pump 4 is model VIKING 4225.

[0031] Specifically, in this embodiment, the safety contactor 12 is a Siemens SIRIUS 3RT6 SIL3 model.

[0032] Specifically, in this embodiment, the end of the steam jacketed resin filter 10 is connected to a steam trap via the steam pipeline 2. The steam trap is an important accessory in the steam pipeline, installed at a low position in the pipeline to automatically drain condensate and prevent steam leakage. In steam pipeline systems, due to the temperature difference between the inside and outside of the pipeline, condensate inevitably forms. This condensate can cause significant damage to the pipeline system, such as water hammer and pipe damage. The function of the steam trap is to prevent steam leakage and drain water from the steam pipeline 2, ensuring that condensate is discharged without any steam leakage.

[0033] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0034] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0035] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. An overpressure interlock protection resin feeding and filtration system for filtering resin discharged from a reactor, characterized in that, include: A steam-jacketed gear pump, a steam-jacketed resin delivery pipe, and a steam-jacketed resin filter are connected in sequence. After the powder coating resin is reacted in the reactor, it is discharged from the reactor and enters the steam-jacketed gear pump. The steam-jacketed gear pump is connected to a steam hand valve through a steam pipeline. The steam-jacketed gear pump, the steam-jacketed resin delivery pipe, and the steam-jacketed resin filter are also connected through steam pipelines. An interlocking protection assembly is used between the steam-jacketed gear pump and the steam-jacketed resin delivery pipe. The interlocking protection assembly includes a pressure transmitter, a pressure measuring diaphragm kit, a control system, and a safety contactor. The pressure transmitter is installed on the steam jacketed resin delivery pipe via the pressure measuring diaphragm kit. One end of the control system is connected to the pressure transmitter, and the other end of the control system is connected to the steam jacketed gear pump via the safety contactor. The pressure inside the steam jacketed resin delivery pipe is transmitted to the control system via the pressure transmitter.

2. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, When the pressure inside the steam-jacketed resin delivery pipe exceeds 0.4 MPa, the control system outputs a shutdown signal, and the control system controls the safety contactor to cut off the power supply to the steam-jacketed gear pump, causing the steam-jacketed gear pump to stop operating.

3. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, The pressure measuring diaphragm kit is connected to the steam jacket resin delivery pipe via a mounting base.

4. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, The pressure measurement diaphragm kit is model ROSEMIUNT 1199.

5. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, The steam-jacketed resin delivery pipe includes an inner pipe and an outer pipe surrounding the inner pipe.

6. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, The steam jacketed gear pump is model VIKING 4225.

7. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, The safety contactor is a Siemens SIRIUS 3RT6 SIL3 model.

8. The overpressure interlock protection resin feeding and filtration system according to claim 1, characterized in that, The end of the steam jacketed resin filter is connected to a steam trap via the steam pipeline.

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