KR-102964124-B1 - Ultrafine Powder Pipeline Transportation Anti-Blocking Monitoring Method and System Based on Dilute Phase Pneumatic Conveying Device

KR102964124B1KR 102964124 B1KR102964124 B1KR 102964124B1KR-102964124-B1

Abstract

The present invention provides a method and system for monitoring the prevention of blockage in ultrafine powder pipeline transfer based on a dilute phase pneumatic transfer device. The method comprises the steps of: obtaining the gas transfer pressure after the valve of a gas transfer pipeline; obtaining a pressure loss adjustment value by performing a gas transfer pressure loss adjustment process on the gas transfer pressure after the valve and a preset gas transfer pressure; and adjusting the operating mode of a dry ice rotary valve by transmitting a blockage removal disable signal to a dry ice blockage removal controller according to the pressure loss adjustment value. After collecting the gas transfer pressure after the valve, the current pipeline pneumatic transfer pressure of the gas transfer pipeline is determined, and then, by comparing the gas transfer pressure after the valve with a standard gas transfer pressure, it is easy to determine the difference in pressure loss within the current pipeline of the gas transfer pipeline. Finally, by adjusting the dry ice rotary valve connected to the gas transfer pipeline according to the difference value, dry ice clearing can be performed in a timely manner when a blockage occurs in the pipeline, thereby improving the dry ice clearing efficiency.

Inventors

정, 춘양
류, 이엔페이
야오, 먀오먀오
시에, 취안

Assignees

주식회사 소폰테크놀로지코리아
광둥 소폰 인텔리전트 테크놀로지 컴퍼니 리미티드
선전 훙안 퓨처 인포메이션 테크놀로지 컴퍼니 리미티드

Dates

Publication Date: 20260513
Application Date: 20250807
Priority Date: 20250508

Claims (7)

As a monitoring method for preventing blockage in ultrafine powder pipeline transfer based on a rarefaction pneumatic conveying device, The method includes the step of conveying ultrafine powder through a pipeline using a rarefaction pneumatic conveying device, wherein the rarefaction pneumatic conveying device includes a gas conveying assembly and a material conveying assembly. The above gas transfer assembly comprises a gas transfer pipeline, a gas transfer rotary valve, a dry ice storage tank, a dry ice rotary valve, a first pressure transmitter, and a second pressure transmitter. The gas inlet end of the gas transfer pipeline is connected to a lean phase pneumatic transfer pump to introduce dry compressed gas. The gas transfer rotary valve is connected to the gas transfer pipeline. Both the first pressure transmitter and the second pressure transmitter are connected to the gas transfer pipeline. The first pressure transmitter is located between the gas transfer rotary valve and the lean phase pneumatic transfer pump, i.e., upstream of the gas transfer rotary valve. The second pressure transmitter is located on the opposite side of the first pressure transmitter with the gas transfer rotary valve in between, and is located downstream of the gas transfer rotary valve. The dry ice storage tank is connected to the dry ice rotary valve, and dry ice is stored in the dry ice storage tank. The dry ice rotary valve is connected to the gas transfer pipeline. The dry ice rotary valve is connected to the gas transfer rotary valve and the second pressure transmitter. Located on the downstream side; The above material transfer assembly includes an ultrafine powder material transmission chamber and a material rotation valve that are in communication with each other, the material rotation valve is in communication with the gas discharge end of the gas transfer pipeline, and the material rotation valve is also in communication with the material receiving chamber; The above-described ultrafine powder pipeline transfer blockage prevention monitoring method is, Step of obtaining gas transfer pressure after the valve of the gas transfer pipeline; A step of obtaining a pressure loss adjustment value by performing gas transfer pressure loss adjustment processing on the gas transfer pressure after the above valve and a preset gas transfer pressure; The method includes the step of transmitting a blockage disable signal to a dry ice blockage removal controller according to the above pressure loss adjustment value to adjust the operating mode of the dry ice rotary valve, The step of adjusting the operating mode of the dry ice rotary valve by transmitting a blockage disable signal to the dry ice blockage removal controller according to the above pressure loss adjustment value is, A step of detecting whether the above pressure loss adjustment value is 0 or greater; A step of obtaining the pneumatic transfer flow rate of the gas transfer pipeline when the above pressure loss adjustment value is 0 or greater; A step of detecting whether the above pneumatic transfer flow rate is less than or equal to a preset transfer flow rate; If the above pneumatic transfer flow rate is less than or equal to the above preset transfer flow rate, the method includes the step of transmitting a blockage removal enable signal to the above dry ice blockage removal controller to increase the valve opening degree of the above dry ice rotary valve. Prior to the step of transmitting a clog removal enable signal to the dry ice clog removal controller to increase the valve opening degree of the dry ice rotary valve, The method further includes the step of performing a spray adjustment operation for the above pressure loss adjustment value and the above pneumatic transfer flow rate to obtain the valve opening degree of the dry ice rotary valve and the valve opening degree of the gas transfer rotary valve. The valve opening degree of the above dry ice rotary valve satisfies the following formula, and In the above formula, is the valve opening degree of the dry ice rotary valve, and is the pressure loss error, and is the flow rate error, and is the pressure of the second pressure transmitter during full load transfer, and is the pressure of the second pressure transmitter when the pipeline is blocked, and is the initial pressure of the first pressure transmitter when there is no material, and is the current flow rate of the pneumatic transfer flow, and is the full load flow rate of the pneumatic transfer flow rate, and Pressure loss error regarding the opening degree of the dry ice rotary valve It is the proportionality constant of, and The flow rate error regarding the opening degree of the dry ice rotary valve It is the proportionality constant of, and is the integration coefficient of the pressure loss error with respect to the opening degree of the dry ice rotary valve, and A monitoring method for preventing blockage in ultrafine powder pipeline transfer based on a rarefaction pneumatic transfer device, characterized by the differential coefficient of pressure loss error with respect to the opening degree of a dry ice rotary valve.
In paragraph 1, The step of performing gas transfer pressure loss adjustment processing for the gas transfer pressure after the above valve and the preset gas transfer pressure is, A monitoring method for preventing blockage of ultrafine powder pipeline transfer based on a lean phase pneumatic transfer device, comprising the step of calculating the pressure loss of the gas transfer pressure after the valve and the preset gas transfer pressure, wherein the gas transfer pressure after the valve is the pressure of the second pressure transmitter and the preset gas transfer pressure has a positive correlation with the pressure of the first pressure transmitter.
In paragraph 2, A monitoring method for preventing blockage of ultrafine powder pipeline transfer based on a dilute pneumatic transfer device, characterized in that the ratio of the above preset gas transfer pressure to the pressure of the above first pressure transmitter is 0.7 to 0.8.
In paragraph 1, The above material transfer assembly further includes an accelerator, the material inlet end of the accelerator is in communication with the material rotary valve, the gas inlet end of the accelerator is in communication with the gas transfer pipeline, and the material discharge end of the accelerator is in communication with the material receiving chamber. The step of obtaining the pneumatic transfer flow rate of the gas transfer pipeline is specifically, A monitoring method for preventing blockage in ultrafine powder pipeline transfer based on a rarefaction pneumatic transfer device, characterized by obtaining the gas transfer flow rate at the gas inlet end of the accelerator.
In paragraph 1, The valve opening degree of the above gas transfer rotary valve satisfies the following formula, and In the above formula, is the pressure loss error for the opening degree of the gas transfer rotary valve It is the proportionality constant of, and is the flow rate error for the opening degree of the gas transfer rotary valve. It is the proportionality constant of, and is the integration coefficient of the pressure loss error with respect to the opening degree of the gas transfer rotary valve, and A monitoring method for preventing blockage in ultrafine powder pipeline transfer based on a lean phase pneumatic transfer device, characterized by the differential coefficient of pressure loss error with respect to the opening degree of a gas transfer rotary valve.
In paragraph 5, If the above pneumatic transfer flow rate is less than or equal to the above preset transfer flow rate, after the step of transmitting a blockage removal enable signal to the dry ice blockage removal controller to increase the valve opening degree of the dry ice rotary valve, A step of detecting whether the valve opening degree of the above gas transfer rotary valve is less than or equal to a preset gas transfer opening degree; A monitoring method for preventing blockage in ultrafine powder pipeline transfer based on a rarefaction pneumatic transfer device, characterized by further including the step of closing the dry ice rotary valve by transmitting an opening stop signal to the dry ice blockage removal controller when the valve opening degree of the gas transfer rotary valve is less than or equal to the preset gas transfer opening degree.
An ultrafine powder pipeline clogging prevention monitoring system using an ultrafine powder pipeline clogging prevention monitoring method based on a rarefine pneumatic conveying device according to any one of claims 1 to 6.

Description

Ultrafine Powder Pipeline Transportation Anti-Blocking Monitoring Method and System Based on Dilute Phase Pneumatic Conveying Device The present invention relates to the field of rarefaction pneumatic pipeline conveying technology, and in particular to a method and system for monitoring blockage prevention of ultrafine powder pipeline conveying based on a rarefaction pneumatic conveying device. Pneumatic conveying is an engineering technology that utilizes electricity generated by gas flow to directionally transport particulate or powder materials along pipelines. The core mechanism involves driving the flow of materials using high-speed airflow formed within a closed pipeline containing air or an inert medium (e.g., nitrogen). However, in conveying systems, powder materials easily deposit and adhere to the inner walls of the pipeline due to electrostatic adsorption, humidity, or van der Waals forces. This continuously accumulating layer of adhesion gradually forms localized agglomerates; as the conveying process progresses, the flowing powder repeatedly collides with and adheres to these agglomerates on the pipe walls, causing the volume of the agglomerates to increase exponentially. If the powder attached to the pipeline is not removed in a timely manner, not only is material conveying efficiency significantly reduced, but problems such as pipeline diameter contraction and increased airflow turbulence can also occur, eventually leading to complete pipeline blockage and severely impacting the stability and continuity of system operations. The re-cleaning methods for existing transfer pipelines are mainly as follows. a. Regular purging method: After stopping the machine, compressed air is connected to gradually purge from the beginning of the pipeline, removing residual ash through the impact of the airflow. The purging frequency is adjusted according to the characteristics of the material; for example, the number of purging cycles must be increased for materials prone to adhesion, but this method is suitable only for short-distance purging and has limited effectiveness for adhered ash. b. Mechanical clearing method: Vibrators are installed along the pipeline and the vibration frequency is controlled by pulses, but on-site noise is severe and the pipeline becomes loose, increasing the risk of leakage. c. Manual re-washing: Clearing by using high-pressure water guns or dismantling pipelines is inefficient, labor-intensive, and involves long downtimes, affecting production continuity. To more clearly explain the technical means of the embodiments of the present invention, the drawings used in the embodiments are briefly introduced. The following drawings represent only specific embodiments of the present invention and should not be construed as limiting the scope of the present invention. A person skilled in the art will be able to obtain other related drawings based on these drawings without creative work. FIG. 1 is a flowchart of a monitoring method for preventing blockage of ultrafine powder pipeline transfer based on a rarefaction pneumatic transfer device according to one embodiment. FIG. 2 is a schematic diagram of a lean phase pneumatic transfer device according to one embodiment. The present invention relates to a monitoring method for preventing blockage in ultrafine powder pipeline transfer based on a rarefaction pneumatic transfer device. In one embodiment, the monitoring method for preventing blockage in ultrafine powder pipeline transfer based on the rarefaction pneumatic transfer device comprises: a step of obtaining a gas transfer pressure after a valve of a gas transfer pipeline; a step of obtaining a pressure loss adjustment value by performing a gas transfer pressure loss adjustment process on the gas transfer pressure after the valve and a preset gas transfer pressure; and a step of adjusting the operating mode of a dry ice rotary valve by transmitting a blockage removal disable signal to a dry ice blockage removal controller according to the pressure loss adjustment value. After collecting the gas transfer pressure after the valve, the current pneumatic transfer pressure of the gas transfer pipeline is determined. Then, by comparing the gas transfer pressure after the valve with the standard gas transfer pressure, it is easy to determine the difference in pressure loss within the current pipeline. Finally, by adjusting the dry ice rotary valve connected to the gas transfer pipeline according to the above difference value, the operating mode of the dry ice rotary valve is optimized to perform dry ice clearing in a timely manner when a blockage occurs in the pipeline, thereby improving dry ice clearing efficiency. Furthermore, the used dry ice vaporizes into carbon dioxide gas due to collision with the pipe wall and temperature rise after clearing, which mixes with the transfer gas within the pipeline, effectively reducing pipeline clearing costs. Referring to FIG. 1, this is a flowchart of