A pneumatic conveying system for viscous materials

Abstract

This utility model discloses a pneumatic conveying system for viscous materials, including a reaction vessel and a storage tank. The reaction vessel has a discharge port at its bottom, and the storage tank is connected to the discharge port of the reaction vessel via a first connecting pipe. The bottom outlet of the storage tank is connected to a downstream process via a second connecting pipe. A first pneumatic shut-off valve and a second pneumatic shut-off valve are respectively installed on the first connecting pipe and the second connecting pipe. This utility model achieves fully enclosed conveying through dual-mode switching of the pneumatic compressor unit, completely eliminating odor emission caused by material volatilization; the negative pressure suction mode ensures no material residue transfer, eliminating energy waste; positive pressure conveying combined with a proportional regulating valve significantly improves conveying efficiency; real-time viscosity monitoring and automatic air pressure adjustment function enable the system to adapt to viscosity changes of different materials; dynamic control of air pressure gradient significantly reduces pipeline deposition and extends equipment maintenance cycle.

Description

Technical Field

[0001] This utility model relates to the field of material conveying technology, and in particular to a pneumatic conveying system for viscous materials. Background Technology

[0002] In the chemical, food, and pharmaceutical industries, pipeline transportation of viscous materials is a core production process, and its efficiency and airtightness directly affect product quality and energy consumption. Currently, centrifugal pumps or screw pumps are the mainstream methods for transportation. These mechanical pumps rely on impeller rotation to propel materials, which has certain shortcomings: Traditional pumping systems often suffer from serious odor loss and energy waste due to material residue in the conveying of viscous materials, which are volatile and emit odors. Existing viscous material conveying technologies lack viscosity adaptive mechanisms, resulting in unstable conveying efficiency. Meanwhile, the liquid level monitoring of storage units relies on a single sensor, making it difficult to eliminate the risk of overflow. Pipeline sedimentation exacerbates the equipment maintenance burden. Therefore, it is necessary to design a pneumatic conveying system for viscous materials. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic conveying system for viscous materials, which solves the problems of serious odor emission and energy waste caused by material residue in existing traditional pumping systems for conveying viscous materials. These problems include the lack of viscosity adaptive mechanism in existing viscous material conveying technology, resulting in unstable conveying efficiency. In addition, the reliance on a single sensor for liquid level monitoring in the storage unit makes it difficult to eliminate the risk of overflow, and the increased burden of equipment maintenance due to pipeline sedimentation.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pneumatic conveying system for viscous materials, including a reaction vessel and a storage tank, wherein the bottom of the reaction vessel is provided with a discharge port, and the storage tank is connected to the discharge port of the reaction vessel through a first connecting pipe; The bottom outlet of the storage tank is connected to the downstream process via a second connecting pipe; The first connecting pipe and the second connecting pipe are respectively equipped with a first pneumatic shut-off valve and a second pneumatic shut-off valve, and the connection of each pipe has good sealing performance; The top of the storage tank is connected to a pneumatic compressor unit via a third connecting pipe. The pneumatic compressor unit has dual working modes of positive pressure boosting and negative pressure evacuation. The pneumatic compressor unit has a built-in air path switching mechanism, which realizes the rapid switching between positive and negative pressure modes through a solenoid valve. When evacuating under negative pressure, a stable vacuum environment is formed, and when boosting under positive pressure, a continuous and controllable pressure field is established. A viscometer is installed on the top of the reactor, and its probe extends to the bottom of the reactor to sense the flow resistance of the material in real time through a sensor, ensuring the accuracy of viscosity monitoring at full liquid level; The viscometer, the air pressure unit, the first pneumatic cut-off valve and the second pneumatic cut-off valve are all signal-connected to the PLC controller. The PLC controller integrates a signal conversion module, which converts the analog signal of the viscometer into an air pressure control instruction, and stably outputs the air pressure intensity through the PID algorithm to avoid uneven conveying caused by pressure fluctuations.

[0005] As a further technical solution of the present invention, the PLC controller is configured to adjust the output air pressure of the air pressure unit according to the real-time viscosity data of the viscometer.

[0006] As a further technical solution of the present invention, a limit alarm is provided on the top of the storage tank to detect the liquid level of the material in the tank; The limit alarm is signal-connected to the PLC controller, and when the liquid level reaches the upper limit, it triggers to close the first pneumatic cut-off valve and alarm.

[0007] As a further technical solution of the present invention, a transparent observation window is embedded on the top of the storage tank.

[0008] As a further technical solution of the present invention, the dual working modes of the air pressure unit are as follows: Negative pressure suction mode: Start negative pressure pumping to create a negative pressure in the storage tank, and at the same time open the first pneumatic cut-off valve to suck the material in the reactor; Positive pressure conveying mode: Close the first pneumatic cut-off valve, switch to positive pressure boosting and open the second pneumatic cut-off valve to press the material into the second connecting pipe.

[0009] As a further technical solution of the present invention, a proportional regulating valve is installed on the third connecting pipe, and the valve core opening of the proportional regulating valve is controlled by the PLC controller.

[0010] As a further technical solution of the present invention, the air pressure unit includes a positive pressure compressor and a negative pressure vacuum pump connected in parallel, and the start and stop of the positive pressure compressor and the negative pressure vacuum pump are independently controlled by the PLC controller.

[0011] The advantages of the pneumatic conveying system for viscous materials provided by the present invention are as follows: Full-closed conveying is achieved through the dual-mode switching of the air pressure unit, completely eliminating the odor escape caused by material volatilization; the negative pressure suction mode ensures residue-free transfer of materials and杜绝能源空耗;正压输送结合比例调节阀实现输送效率显著提升; It should be noted that there is an incorrect expression "杜绝能源空耗" in the original text. It should be something like "eliminating unnecessary energy consumption" for a more accurate translation. And the "正压输送结合比例调节阀实现输送效率显著提升" part seems to be a bit jumbled in the original Chinese. A more accurate and clear expression might be "The combination of positive pressure conveying and the proportional regulating valve significantly improves the conveying efficiency". The above translation has tried to make sense of the overall meaning while keeping the original structure as much as possible.The system features real-time viscosity monitoring and automatic pressure adjustment, enabling it to adapt to viscosity variations of different materials. Limit alarms and transparent observation windows form a dual liquid level monitoring mechanism, effectively preventing the risk of spillage. Dynamic pressure gradient control significantly reduces pipeline sedimentation and extends equipment maintenance cycles. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] In the diagram: 1. Reactor; 11. First connecting pipe; 111. First pneumatic shut-off valve; 2. Storage tank; 21. Second connecting pipe; 211. Second pneumatic shut-off valve; 22. Third connecting pipe; 221. Proportional regulating valve; 3. Pneumatic compressor unit; 4. Viscometer; 5. PLC controller; 6. Limit alarm. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Please see the appendix Figure 1 An embodiment of this utility model is provided: a pneumatic conveying system for viscous materials, including a reaction vessel 1 and a storage tank 2. The bottom of the reaction vessel 1 is provided with a discharge port, and the storage tank 2 is connected to the discharge port of the reaction vessel 1 through a first connecting pipe 11. A transparent observation window is embedded in the top of the storage tank 2. The bottom outlet of storage tank 2 is connected to the downstream process via the second connecting pipe 21; The first connecting pipe 11 and the second connecting pipe 21 are respectively equipped with a first pneumatic shut-off valve 111 and a second pneumatic shut-off valve 211, and the connection of each pipe has good sealing performance. The top of the storage tank 2 is connected to the pneumatic compressor unit 3 via a third connecting pipe 22. A proportional regulating valve 221 is installed on the third connecting pipe 22, and the valve core opening of the proportional regulating valve 221 is controlled by the PLC controller 5. The pneumatic compressor unit 3 includes a positive pressure compressor and a negative pressure vacuum pump connected in parallel. The start and stop of the positive pressure compressor and the negative pressure vacuum pump are independently controlled by the PLC controller 5. The pneumatic compressor unit 3 has dual working modes of positive pressure boosting and negative pressure evacuation. The pneumatic compressor unit 3 has a built-in air path switching mechanism, which realizes rapid switching between positive and negative pressure modes through a solenoid valve. A stable vacuum environment is formed during negative pressure evacuation, and a stable vacuum environment is established during positive pressure boosting. A continuous and controllable pressure field; a limit alarm 6 is installed on the top of the storage tank 2 to detect the liquid level of the material in the tank. The limit alarm 6 is connected to the PLC controller 5. When the liquid level reaches the upper limit, it triggers the closure of the first pneumatic shut-off valve 111 and alarms; the dual working modes of the pneumatic compressor unit 3 are: negative pressure suction mode: start the negative pressure pump to form a negative pressure in the storage tank 2, and at the same time open the first pneumatic shut-off valve 111 to suck in the material in the reactor 1; positive pressure conveying mode: close the first pneumatic shut-off valve 111, switch to positive pressure boosting and open the second pneumatic shut-off valve 211 to press the material into the second connecting pipe 21; A viscometer 4 is installed on the top of the reactor 1, with its probe extending to the bottom of the reactor 1. The sensor detects the resistance to material flow in real time, ensuring the accuracy of viscosity monitoring at all liquid levels. Viscometer 4, air compressor unit 3, first pneumatic shut-off valve 111 and second pneumatic shut-off valve 211 are all connected to PLC controller 5. PLC controller 5 integrates a signal conversion module to convert the analog signal of viscometer 4 into air pressure control command, and stabilizes the output air pressure intensity through PID algorithm to avoid uneven delivery caused by pressure fluctuation. PLC controller 5 is configured to adjust the output air pressure of air compressor unit 3 according to the real-time viscosity data of viscometer 4.

[0018] Specifically, in use, the first stage is negative pressure material suction: PLC controller 5 starts the negative pressure vacuum pump of pneumatic compressor unit 3, and evacuates air from storage tank 2 through the third connecting pipe 22 to create a negative pressure environment inside the tank; PLC controller 5 opens the first pneumatic shut-off valve 111, and the material in reactor 1 is drawn into storage tank 2 through the first connecting pipe 11 under the action of pressure difference; limit alarm 6 monitors the liquid level of storage tank 2 in real time, and when the upper limit is reached, it triggers PLC controller 5 to close the first pneumatic shut-off valve 111 and alarm; Positive pressure conveying stage: PLC controller 5 switches pneumatic compressor unit 3 to positive pressure compressor, and at the same time closes the first pneumatic shut-off valve 111; PLC controller 5 opens the second pneumatic shut-off valve 211 to pressurize the storage tank 2, and the material is pressed into the downstream process through the second connecting pipe 21; the proportional regulating valve 221 adjusts the opening degree according to the data of viscometer 4: if the viscosity increases, the opening degree is increased, and the pressure after the valve is increased; if the viscosity decreases, the opening degree is decreased, and the pressure after the valve is decreased; a dynamic air pressure gradient is formed in the pipeline; Viscosity adaptive adjustment: Viscometer 4 probe detects the viscosity of the material at the bottom of reactor 1 in real time and transmits the data to PLC controller 5; PLC controller 5 synchronously adjusts the output air pressure intensity of air compressor unit 3 and the valve core opening of proportional regulating valve 221 to achieve real-time matching between conveying pressure and viscosity; System inspection and maintenance: Manually check the residual material in storage tank 2 through the transparent observation window, start the pneumatic compressor unit 3 in strong positive pressure mode; fully open the proportional regulating valve 221, and the high-pressure airflow flushes the first connecting pipe 11 and the second connecting pipe 21 to remove the deposits on the pipe walls; In summary, this utility model achieves fully enclosed conveying through the dual-mode switching of the pneumatic compressor unit, completely eliminating the odor emission caused by material volatilization; the negative pressure suction mode ensures no material residue transfer, eliminating energy waste; and the positive pressure conveying combined with the proportional regulating valve 221 significantly improves conveying efficiency. The system features real-time viscosity monitoring and automatic pressure adjustment, enabling it to adapt to viscosity variations of different materials. Limit alarms and transparent observation windows form a dual liquid level monitoring mechanism, effectively preventing the risk of spillage. Dynamic pressure gradient control significantly reduces pipeline sedimentation and extends equipment maintenance cycles.

[0019] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pneumatic conveying system for viscous materials, comprising a reactor (1) and a storage tank (2), characterized in that: The reactor (1) is provided with a discharge port at the bottom, and the storage tank (2) is connected to the discharge port of the reactor (1) through a first connecting pipe (11); The bottom outlet of the storage tank (2) is connected to the downstream process via a second connecting pipe (21); The first connecting pipe (11) and the second connecting pipe (21) are respectively provided with a first pneumatic shut-off valve (111) and a second pneumatic shut-off valve (211). The top of the storage tank (2) is connected to a pneumatic compressor unit (3) via a third connecting pipe (22). The pneumatic compressor unit (3) has a dual working mode of positive pressure boosting and negative pressure suction. A viscometer (4) is installed on the top of the reactor (1), with its probe extending to the bottom of the reactor (1); The viscometer (4), the air compressor unit (3), the first pneumatic shut-off valve (111) and the second pneumatic shut-off valve (211) are all connected to the PLC controller (5) via signal.

2. A pneumatic delivery system for viscous materials as defined in claim 1, wherein: The PLC controller (5) is configured to adjust the output air pressure of the air compressor unit (3) based on the real-time viscosity data of the viscometer (4).

3. A pneumatic delivery system for viscous materials as defined in claim 1, wherein: The storage tank (2) is equipped with a limit alarm (6) on the top to detect the liquid level of the material inside the tank; The limit alarm (6) is connected to the PLC controller (5) by signal. When the liquid level reaches the upper limit, it triggers the closure of the first pneumatic shut-off valve (111) and alarms.

4. A pneumatic delivery system for viscous materials as defined in claim 1, wherein: The top of the storage tank (2) is fitted with a transparent observation window.

5. A pneumatic delivery system for viscous materials as defined in claim 1, wherein: The dual operating modes of the air compressor unit (3) are as follows: Negative pressure suction mode: Start the negative pressure suction to create negative pressure in the storage tank (2), and at the same time open the first pneumatic shut-off valve (111) to suck in the material in the reactor (1); Positive pressure conveying mode: Close the first pneumatic shut-off valve (111), switch to positive pressure boosting and open the second pneumatic shut-off valve (211) to press the material into the second connecting pipe (21).

6. A pneumatic conveying system for viscous materials according to claim 1, characterized in that: A proportional regulating valve (221) is installed on the third connecting pipe (22), and the valve core opening of the proportional regulating valve (221) is controlled by the PLC controller (5).

7. A pneumatic delivery system for viscous materials as defined in claim 1, wherein: The pneumatic compressor unit (3) includes a positive pressure compressor and a negative pressure vacuum pump connected in parallel. The start and stop of the positive pressure compressor and the negative pressure vacuum pump are independently controlled by the PLC controller (5).

Images