Powder electrostatic risk assessment system and method

Abstract

The application provides a powder electrostatic risk evaluation system, which comprises: a powder circulating device for realizing powder circulation; a parameter measuring device for measuring charge amount data, powder mass data and electrostatic potential data of the powder; and an information processing device for evaluating the electrostatic risk of the powder based on the charge amount data, the powder mass data and the electrostatic potential data. The application realizes comprehensive analysis of powder charge-to-mass ratio data, electrostatic potential data and decay time data, and completes the electrostatic electrification characteristic evaluation of the powder. The application can detect the electrostatic parameters of different types of powder under unified working conditions, and evaluate the electrostatic risk of the powder. The application can take electrostatic prevention and control measures based on the electrostatic risk evaluation result of the powder.

Description

Technical Field

[0001] This invention relates to the field of petrochemical oil and gas storage and transportation equipment technology, and more specifically, to a powder electrostatic risk assessment system and method. Background Technology

[0002] During the transportation of petrochemical powders, friction between the powder and the pipeline, as well as between the powder itself, inevitably generates a large amount of static electricity. Since most powders are electrostatic insulators, the static electricity is difficult to dissipate, leading to its accumulation and potentially causing electrostatic explosions. Several such accidents involving static electricity explosions in silos have occurred in China, causing significant losses to enterprises.

[0003] Currently, the most important measure to prevent powder electrostatic explosion accidents is to install electrostatic eliminators on the pipes at the silo inlet. However, there are no specific regulations in the industry regarding which powders require electrostatic eliminators and which do not.

[0004] Existing technologies lack methods for detecting the electrostatic parameters of powders under standardized operating conditions and for assessing the electrostatic risks associated with powders. Therefore, this invention provides a powder electrostatic risk assessment system and method. Summary of the Invention

[0005] To address the aforementioned problems, it is necessary to assess the electrostatic risk of powders, implement targeted electrostatic control measures, and detect the electrostatic parameters of the powders under uniform operating conditions, thereby assessing the electrostatic risk. Therefore, this invention provides a powder electrostatic risk assessment system, the system comprising:

[0006] A powder circulation device, used to realize powder circulation;

[0007] A parameter measuring device used to measure and obtain data on the charge, mass, and electrostatic potential of powders;

[0008] An information processing device for assessing the electrostatic risk of powder based on the charge data, the powder quality data, and the electrostatic potential data.

[0009] According to one embodiment of the present invention, the powder recycling device comprises:

[0010] A blower, used to provide power for the flow of powder;

[0011] The pipeline includes an inlet end, a feeding section and a circulation section connected in sequence, for providing a channel for the circulating flow of powder, wherein the inlet end is equipped with the blower;

[0012] A powder hopper, connected to the circulation section, is used to store powder.

[0013] According to one embodiment of the present invention, the parameter measuring device comprises:

[0014] A charge measuring device is installed on the hopper to measure the charge data and the powder mass data.

[0015] According to one embodiment of the present invention, the charge measuring device includes an inner cylinder and an outer cylinder, both of which are made of metal. The inner cylinder and the outer cylinder are insulated from each other, and the outer cylinder is grounded.

[0016] According to one embodiment of the present invention, the charge measuring device comprises:

[0017] A charge measurement module is used to measure the charge of the powder when the inner cylinder and the outer cylinder are closed, so as to obtain the charge data;

[0018] A powder quality measurement module is used to measure the mass of powder inside the inner cylinder to obtain the powder quality data.

[0019] An information transmission module is used to send a closing success signal to the information processing device after the inner cylinder and the outer cylinder are closed simultaneously.

[0020] The zeroing module is used to zero out the charge data and the powder mass data after the inner cylinder and the outer cylinder are successfully closed.

[0021] According to one embodiment of the present invention, the parameter measuring device comprises:

[0022] An electrostatic potential measuring device is installed on the hopper to measure the potential of the powder in the hopper in real time in order to obtain the electrostatic potential data.

[0023] According to one embodiment of the present invention, the information processing apparatus includes:

[0024] The data setting module is used to set the cycle time threshold, powder volume threshold, and electrostatic potential decay ratio.

[0025] The powder mass calculation module is used to calculate the upper limit of powder mass based on powder density and the powder volume threshold.

[0026] A timing module is used to start timing after feeding is completed, and to close the inner cylinder and the outer cylinder of the charge measurement device after the cycle time threshold is met;

[0027] A powder charge-to-mass ratio module is used to calculate the powder charge-to-mass ratio data based on the charge data and the powder mass data when the powder mass reaches the upper limit value of the powder mass, and at the same time ground the charge measurement device.

[0028] The electrostatic decay time module is used to record the electrostatic decay time when the real-time electrostatic potential decays to the electrostatic potential decay ratio of the initial electrostatic potential.

[0029] The risk assessment module is used to determine the electrostatic risk of the powder by comprehensively considering the powder charge-to-mass ratio data, the electrostatic potential data, and the electrostatic decay time.

[0030] The display module is used to display the powder name, powder density, powder volume threshold, cycle time threshold, charge-to-mass ratio, initial value of electrostatic potential decay and decay curve, the closed and open status information of the inner cylinder and the outer cylinder, and the powder electrostatic risk assessment report.

[0031] According to one embodiment of the present invention, the system comprises:

[0032] A feeding device, connected to the feeding section, is used to add different types of powders into the powder electrostatic risk assessment system.

[0033] According to one embodiment of the present invention, the system comprises:

[0034] A rotary valve is connected to the circulation section above the powder hopper. When the rotary valve is open, powder enters the powder hopper, and when the rotary valve is closed, powder is prevented from entering the hopper.

[0035] According to another aspect of the present invention, a method for assessing the electrostatic risk of powder is also provided, wherein the electrostatic risk of powder is assessed using a powder electrostatic risk assessment system as described in any of the preceding claims, the method comprising:

[0036] Powder circulation is achieved through a powder circulation device;

[0037] The charge data, mass data, and electrostatic potential data of the powder are obtained by measuring the parameters using a parameter measuring device.

[0038] The electrostatic risk of the powder is assessed by an information processing device based on the charge data, the powder quality data, and the electrostatic potential data.

[0039] The powder electrostatic risk assessment system and method provided by this invention comprehensively analyzes powder charge-to-mass ratio data, electrostatic potential data, and decay time data to assess the electrostatic charging characteristics of the powder. This invention can detect the electrostatic parameters of different types of powders under uniform operating conditions and assess the electrostatic risk of the powder. Based on the electrostatic risk assessment results, this invention can implement targeted electrostatic control measures.

[0040] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0041] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0042] Figure 1 A block diagram of a powder electrostatic risk assessment system according to an embodiment of the present invention is shown;

[0043] Figure 2 A schematic diagram of a powder electrostatic risk assessment system according to an embodiment of the present invention is shown; and

[0044] Figure 3 A flowchart of a powder electrostatic risk assessment method according to an embodiment of the present invention is shown. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0046] Figure 1 A block diagram of a powder electrostatic risk assessment system according to an embodiment of the present invention is shown.

[0047] like Figure 1 As shown, the powder electrostatic risk assessment system 100 includes: a powder circulation device 101, a parameter measuring device 102, and an information processing device 103.

[0048] Specifically, the powder circulation device 101 is used to realize powder circulation. The parameter measuring device 102 is used to measure the charge data, powder mass data, and electrostatic potential data of the powder. The information processing device 103 is used to assess the electrostatic risk of the powder based on the charge data, powder mass data, and electrostatic potential data.

[0049] Figure 2A schematic diagram of a powder electrostatic risk assessment system according to an embodiment of the present invention is shown. Figure 2 As shown, the powder electrostatic risk assessment system includes: a fan 1, a pipeline 2, a feeding device 3, a powder hopper 4, a rotary valve 5, a charge measurement device 6, an electrostatic potential measurement device 7, and an information processing device 103.

[0050] In one embodiment, the powder circulation device 101 includes: a fan 1, a pipe 2, and a powder hopper 4.

[0051] Blower 1 is used to provide power for the flow of powder. The power provided by blower 1 causes the powder to circulate in pipe 2 and hopper 4.

[0052] Pipeline 2 includes an inlet end, a feeding section and a circulation section connected in sequence, which are used to provide a channel for the circulating flow of powder. A blower 1 is installed at the inlet end.

[0053] The powder hopper 4 is connected to the circulation section and is used to store powder. The pipe 2 is used for conveying powder, and the hopper 4 is connected to the pipe 2 for storing powder. The pipe 2 and the hopper 4 together form the powder circulation path, and the hopper 4 and the pipe 2 together realize the circulation flow of powder. A charge measuring device 6 and an electrostatic potential measuring device 7 are installed.

[0054] In one embodiment, a feeding device 3 is installed on the feeding section, which is used to add different types of powders into the powder electrostatic risk assessment system.

[0055] In one embodiment, a rotary valve 5 is installed on the circulation section, which is connected to the circulation section above the powder hopper 4. When the rotary valve 5 is open, powder enters the powder hopper 4, and when the rotary valve 5 is closed, powder is prevented from entering the hopper 4.

[0056] In one embodiment, the parameter measuring device 102 includes a charge measuring device 6 and an electrostatic potential measuring device 7.

[0057] Specifically, the charge measuring device 6 is installed on the hopper 4 to measure and obtain charge data and powder mass data. The electrostatic potential measuring device 7 is installed on the hopper 4 to measure the potential of the powder inside the hopper 4 in real time to obtain electrostatic potential data.

[0058] Furthermore, the charge measuring device 6 includes an inner cylinder and an outer cylinder, both made of metal. The inner and outer cylinders are insulated from each other, and the outer cylinder is grounded. The bottoms of the inner and outer cylinders are movable. When the inner and outer cylinders are closed and the inner cylinder is insulated from the ground, the charge of the powder inside the cylinder can be measured, and the mass of the powder can also be measured in the inner cylinder.

[0059] Under the control of the information processing device 103, the inner cylinder has two states: grounded and ungrounded. When the inner cylinder is ungrounded, the amount of charge on the powder can be measured. When the inner cylinder is grounded, the electrostatic decay time of the powder can be measured.

[0060] In one embodiment, the charge measurement device 6 includes: a charge module, a powder quality measurement module, an information transmission module, and a zeroing module.

[0061] The charge measurement module is used to measure the charge of the powder when the inner and outer cylinders are closed, so as to obtain charge data.

[0062] The powder quality measurement module is used to measure the mass of powder inside the inner cylinder to obtain powder quality data.

[0063] The information transmission module is used to send a closing success signal to the information processing device 103 after the inner and outer cylinders are closed simultaneously.

[0064] The zeroing module is used to zero out the charge and powder mass data after the inner and outer cylinders are successfully closed. That is, after the inner and outer cylinders are successfully closed, the charge and powder mass data are zeroed out, and the measurement of these data starts from zero.

[0065] In one embodiment, the information processing device 103 can collect charge data from the charge measurement device 6, powder mass data, and electrostatic potential data from the electrostatic potential measurement device 7. The information processing device 103 includes: a data setting module, a powder mass calculation module, a timing module, a powder charge-to-mass ratio module, an electrostatic decay time module, a risk assessment module, and a display module.

[0066] The data setting module is used to set the cycle time threshold, powder volume threshold, and electrostatic potential decay ratio. For example, the cycle time threshold can be set to 120 minutes, and the powder volume threshold to 3 m³. 3 The electrostatic potential attenuation rate is 50%.

[0067] The powder mass calculation module is used to calculate the upper limit of powder mass based on powder density and powder volume threshold. For example, the powder density is 800 kg / m³. 3 The upper limit of the powder mass calculated by the following formula should be 2400 kg.

[0068] In one embodiment, the upper limit value of powder mass m is calculated according to the following formula.

[0069] m=ρV

[0070] Where m represents the upper limit of powder mass in kg, and ρ represents powder density in kg / m³. 3V represents the powder volume threshold, in meters (m). 3 .

[0071] The timing module is used to start timing after feeding is completed and to close the inner and outer cylinders of the charge measurement device after the cycle time threshold is met. For example, timing starts when feeding device 3 completes feeding, and closes the inner and outer cylinders of charge measurement device 6 when the cycle time threshold of 120 minutes is reached.

[0072] The powder charge-to-mass ratio module is used to calculate the powder charge-to-mass ratio based on charge data and powder mass data when the powder mass reaches the upper limit of the powder mass. Simultaneously, it grounds the charge measurement device 6. For example, when the powder mass reaches the upper limit of 2400 kg, the information processing device 103 closes the rotary valve 5, collects charge data and electrostatic potential data, calculates the powder charge-to-mass ratio, and simultaneously grounds the charge measurement device 6.

[0073] The electrostatic decay time module is used to record the electrostatic decay time when the real-time electrostatic potential decays to a percentage of the initial electrostatic potential. For example, using the collected electrostatic potential data as the initial potential, when the electrostatic potential decays to 50% of the set percentage of the initial potential of the information processing device 103, the information processing device 103 records the electrostatic decay time.

[0074] The risk assessment module is used to determine the electrostatic risk of powders by comprehensively considering powder charge-to-mass ratio data, electrostatic potential data, and electrostatic decay time. Specifically, it compares the electrostatic risks of different powders by combining powder charge-to-mass ratio data, electrostatic potential data, and electrostatic decay time.

[0075] In one embodiment, the charge-to-mass ratio is generally required to be 0.3 μC / kg, resulting in a low electrostatic risk during powder transport. However, when the powder potential exceeds 40 kV, brush discharge may occur, potentially igniting the dust. The electrostatic decay time is generally required to decay to 100V in no more than 1 second; however, since powders are typically insulating materials, the decay time may be several hours. It should be noted that the specific values ​​mentioned above are not unique. This invention primarily compares the electrostatic risks of different powders by integrating powder charge-to-mass ratio data, electrostatic potential data, and electrostatic decay time, without imposing limitations on the specific values ​​of these parameters.

[0076] The display module is used to display the powder name, powder density, powder volume threshold, cycle time threshold, charge-to-mass ratio, initial value of electrostatic potential decay and decay curve, information on the opening and closing status of the inner and outer cylinders, and the powder electrostatic risk assessment report.

[0077] In one embodiment, the information processing device 103 sets a cycle time threshold of 240 min and a powder volume threshold of 3 m³.3 The electrostatic potential attenuation rate is 50%. This is based on the powder density of 800 kg / m³. 3 The upper limit of the powder mass should be calculated to be 2400 kg. The information processing device 103 starts timing when the feeding device 3 finishes feeding, and closes the inner and outer cylinders of the charge measurement device 6 when the cycle time threshold of 240 min is reached.

[0078] When the powder mass reaches the upper limit of 2400 kg, the information processing device 103 closes the rotary valve 5, collects charge and electrostatic potential data, calculates the powder charge-to-mass ratio, and simultaneously grounds the charge measuring device 6. Using the collected electrostatic potential data as the initial potential, when the electrostatic potential decays to 50% of the initial potential set by the information processing device 103, the information processing device 103 records the electrostatic decay time. The information processing device 103 combines the powder charge-to-mass ratio data, electrostatic potential data, and electrostatic decay time to determine the electrostatic risk of the powder.

[0079] In another embodiment, the information processing device 103 sets a cycle time threshold of 240 min and a powder volume threshold of 3 m³. 3 The electrostatic potential decay ratio is 1 / e. Based on the powder density of 800 kg / m³... 3 The upper limit of the powder mass should be calculated to be 2400 kg. The information processing device 103 starts timing when the feeding device 3 finishes feeding, and closes the inner and outer cylinders of the charge measurement device 6 when the cycle time threshold of 240 min is reached.

[0080] When the powder mass reaches the upper limit of 2400 kg, the information processing device 103 closes the rotary valve 5, collects charge and electrostatic potential data, calculates the powder charge-to-mass ratio, and simultaneously grounds the charge measuring device 6. Using the collected electrostatic potential data as the initial potential, when the electrostatic potential decays to the set ratio 1 / e of the initial potential of the information processing device 103, the information processing device 103 records the electrostatic decay time. The information processing device 103 combines the powder charge-to-mass ratio data, electrostatic potential data, and electrostatic decay time to determine the electrostatic risk of the powder.

[0081] Figure 3 A flowchart of a powder electrostatic risk assessment method according to an embodiment of the present invention is shown. The powder electrostatic risk assessment method, performed using the powder electrostatic risk assessment system described above, includes:

[0082] like Figure 3 In step S301, powder circulation is achieved through the powder circulation device 101. The power provided by the blower 1 in the powder circulation device 101 causes the powder to circulate in the pipe 2 and the hopper 4.

[0083] like Figure 3In step S302, the charge quantity data, powder mass data, and electrostatic potential data of the powder are measured by the parameter measuring device 102. The charge quantity measuring device 6 consists of an inner cylinder and an outer cylinder, both made of metal. The inner and outer cylinders are insulated from each other, and the outer cylinder is grounded. The bottoms of the two cylinders are movable. When the two cylinders are closed, the charge quantity of the powder inside the cylinder can be measured, and the mass of the powder inside the inner cylinder can also be measured. The inner and outer cylinders close simultaneously, and a closure success signal is sent to the information processing device 103 after closure. After the inner and outer cylinders close successfully, the charge quantity data and powder mass data are reset to zero, and the charge quantity data and powder mass data are measured from zero. The electrostatic potential measuring device 7 can measure the electrostatic potential data of the powder inside the hopper 4 in real time.

[0084] like Figure 3 In step S303, the electrostatic risk of the powder is assessed by the information processing device 103 based on charge data, powder quality data and electrostatic potential data.

[0085] First, the information processing device 103 sets the powder's cycle time threshold, powder volume threshold, and electrostatic potential decay ratio. Then, based on the powder's density input and the powder volume threshold, the information processing device 103 calculates the upper limit of the powder's mass.

[0086] Next, the information processing device 103 can acquire signals indicating successful closure of the inner and outer cylinders of the charge measurement device 6; timing begins when the feeding device 3 completes feeding, and the inner and outer cylinders of the charge measurement device 6 are closed when the cycle time threshold is reached. When the powder mass reaches the upper limit of the powder mass value, the information processing device 103 closes the rotary valve 5, acquires charge data and powder mass data, calculates the powder charge-to-mass ratio data, and simultaneously grounds the charge measurement device 6. Using the acquired electrostatic potential data as the initial potential, the information processing device 103 records the electrostatic decay time when the electrostatic potential decays to the electrostatic potential decay ratio.

[0087] Finally, the information processing device 103 integrates the powder charge-to-mass ratio data, electrostatic potential data, and electrostatic decay time to determine the electrostatic risk of the powder. The information processing device 103 can display information such as powder name, powder density, powder volume threshold, cycle time threshold, charge-to-mass ratio calculation results, initial value and decay curve of electrostatic potential decay, and the closed / open status of the inner and outer cylinders of the charge measurement device 6, and generate a powder electrostatic risk assessment report.

[0088] In summary, the powder electrostatic risk assessment system and method provided by this invention comprehensively analyzes powder charge-to-mass ratio data, electrostatic potential data, and decay time data to assess the electrostatic charging characteristics of the powder. This invention can detect the electrostatic parameters of different types of powders under uniform operating conditions and assess the electrostatic risk of the powder. Based on the electrostatic risk assessment results, this invention can implement targeted electrostatic control measures.

[0089] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0090] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0091] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0092] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0093] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0094] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A powder electrostatic risk assessment system, characterized in that, The system includes components for detecting electrostatic parameters of different types of powders under uniform operating conditions and assessing the electrostatic risks of the powders. A powder circulation device, used to realize the circulation flow of powder; A parameter measuring device used to measure and obtain data on the charge, mass, and electrostatic potential of powders; An information processing device for assessing the electrostatic risk of powder based on the charge data, the powder mass data, and the electrostatic potential data; The powder circulation device includes: a blower for providing power for the flow of powder; a pipeline including an inlet end, a feeding section and a circulation section connected in sequence for providing a channel for the circulation flow of powder, wherein the blower is installed at the inlet end; and a hopper connected to the circulation section for storing powder, wherein the pipeline and the hopper together form the circulation path of the powder. The parameter measuring device includes: a charge measuring device, which is installed on the hopper and is used to measure the charge data and the powder mass data; and an electrostatic potential measuring device, which is installed on the hopper and is used to measure the potential of the powder in the hopper in real time to obtain the electrostatic potential data. The charge measurement device includes an inner cylinder and an outer cylinder, both made of metal. The inner cylinder and the outer cylinder are insulated from each other, and the outer cylinder is grounded. Under the control of the information processing device, the inner cylinder has two states: grounded and ungrounded. When the inner cylinder is ungrounded, the charge of the powder is measured. When the inner cylinder is grounded, the electrostatic decay time of the powder is measured. The charge measurement device includes a charge module and a powder mass measurement module. When the inner cylinder and the outer cylinder are closed, the charge module measures the charge of the powder to obtain the charge data, and the powder mass measurement module measures the mass of the powder inside the inner cylinder to obtain the powder mass data. The information processing device includes: a powder charge-to-mass ratio module, which calculates the powder charge-to-mass ratio data based on the charge data and the powder mass data when the powder mass reaches the upper limit of the powder mass, and simultaneously grounds the charge measurement device; an electrostatic decay time module, which records the electrostatic decay time when the real-time electrostatic potential decays to the electrostatic potential decay ratio of the electrostatic potential data; and a risk assessment module, which judges the electrostatic risk of the powder by comprehensively considering the powder charge-to-mass ratio data, the electrostatic potential data, and the electrostatic decay time.

2. The powder electrostatic risk assessment system as described in claim 1, characterized in that, The charge measuring device includes: An information transmission module is used to send a closing success signal to the information processing device after the inner cylinder and the outer cylinder are closed simultaneously. The zeroing module is used to zero out the charge data and the powder mass data after the inner cylinder and the outer cylinder are successfully closed.

3. The powder electrostatic risk assessment system as described in claim 2, characterized in that, The information processing device further includes: The data setting module is used to set the cycle time threshold, the powder volume threshold, and the electrostatic potential decay ratio. A powder mass calculation module is used to calculate the upper limit value of the powder mass based on the powder density and the powder volume threshold. A timing module is used to start timing after feeding is completed, and to close the inner cylinder and the outer cylinder of the charge measurement device after the cycle time threshold is met; The display module is used to display the powder name, powder density, powder volume threshold, cycle time threshold, charge-to-mass ratio, initial value of electrostatic potential decay and decay curve, the closed and open status information of the inner cylinder and the outer cylinder, and the powder electrostatic risk assessment report.

4. The powder electrostatic risk assessment system as described in claim 1, characterized in that, The system also includes: A feeding device, connected to the feeding section, is used to add different types of powders into the powder electrostatic risk assessment system.

5. The powder electrostatic risk assessment system as described in claim 1, characterized in that, The system also includes: A rotary valve is connected to the circulation section above the hopper. When the rotary valve is open, powder enters the hopper, and when the rotary valve is closed, powder is prevented from entering the hopper.

6. A method for assessing the electrostatic risk of powder, characterized in that, The method of conducting an electrostatic risk assessment of powder using the powder electrostatic risk assessment system as described in any one of claims 1-5 includes: Powder circulation is achieved through a powder circulation device; The charge data, mass data, and electrostatic potential data of the powder are obtained by measuring the parameters using a parameter measuring device. The information processing device obtains the powder charge-to-mass ratio data, the electrostatic potential data, and the electrostatic decay time based on the charge data, the powder mass data, and the electrostatic potential data, in order to assess the electrostatic risk of the powder.

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