A method and system for pressure equalization control of feed containers in a uranium enrichment plant

Abstract

The application belongs to the technical field of uranium enrichment process, and relates to a pressure balance control method and system for a feed container of a uranium enrichment plant. The pressure balance control method comprises the following steps: step 1, real-time monitoring of the pressure values of the containers; step 2, triggering of balance control when the pressure difference between any two containers exceeds a preset threshold; step 3, dynamic calculation of the target temperature required for the low-pressure side container to reach the high-pressure side pressure based on the current pressure and temperature of the low-pressure side container; step 4, adjustment of the heating power of the low-pressure side container to make the temperature of the low-pressure side container approach the target temperature; and step 5, iterative execution of steps 3-4 until the pressure difference is restored to within the threshold. The pressure balance control method and system solve the problems of the influence of feed pouring on the purification qualified rate and purification time during heating and purification, and solve the problems of the influence of large weight deviation on the container exit in the later stage of feed supply, the increase of container turnover time and the reduction of turnover efficiency, and reduce the human cost of multiple container turnovers.

Description

Technical Field

[0001] This application belongs to the field of uranium enrichment technology, and relates to a method and system for pressure balance control of a uranium enrichment plant feed container. Background Technology

[0002] In uranium enrichment centrifuge plants, the continuous operation of cascade centrifuges necessitates a continuous supply of material to the cascade system. During constant temperature (50℃), heating purification, or heating feeding, the temperature sensors in the heating chamber may malfunction, leading to discrepancies between the actual temperatures of the two containers. This temperature deviation, along with differences in material purity within the two containers, results in pressure imbalance, causing the following problems: continuous material transfer from the high-temperature, high-pressure side container to the low-temperature, low-pressure side container may exceed the loading limit; significant weight discrepancies result in longer feeding times; and the system's judgment on the purity of the purified material may be affected. Summary of the Invention

[0003] The purpose of this application is to provide a method and system for controlling the pressure balance of feed containers in uranium enrichment plants, which can solve the problem of pressure imbalance in feed containers.

[0004] The technical solution to achieve the purpose of this application is as follows:

[0005] This application provides a pressure balance control system for a uranium enrichment plant feed container, the control system including a feed container module, a pressure monitoring module, a temperature control module, and a calculation control unit;

[0006] Feeding container module: The first and second feeding containers are set in parallel and placed in independent heating boxes, and are connected to the purification pipeline through feeding pipes respectively;

[0007] Pressure monitoring module: includes a first pressure gauge and a second pressure gauge installed on the feeding pipeline, used to monitor the pressure of the first feeding container and the second feeding container in real time;

[0008] Temperature control module: includes a first temperature probe and a second temperature probe installed in the heating chambers of the first and second feeding containers, as well as a first heating element and a second heating element that are independently controlled; the first temperature probe and the second temperature probe are used to monitor the temperature of the first and second feeding containers in real time, and the first heating element and the second heating element are used to control the temperature of the first and second feeding containers, respectively.

[0009] The calculation and control unit monitors the pressure difference between the two containers in real time and identifies the container pair whose pressure difference exceeds the limit; based on the real-time status parameters of the low-pressure side container, it calculates the target temperature and outputs a power adjustment command to the heating element on the low-pressure side.

[0010] Optionally, the computing control unit adopts a distributed control system (DCS), and its execution logic includes:

[0011] When the pressure difference exceeds the limit, a prompt will pop up saying "Pressure balance control operation of the feeding container has started".

[0012] Once the pressure balancing is complete, a message will pop up saying "Container pressure balancing operation completed".

[0013] Optionally, the calculation control unit automatically reads the pressure of the first pressure gauge and the second pressure gauge; and reads the temperature of the first temperature probe and the second temperature probe.

[0014] Optionally, the first and second feeding containers are each equipped with an independent weighing unit, and the weighing data is used to assist in pressure balance verification.

[0015] This application also provides a method for pressure balance control of a uranium enrichment plant feed container, including the following steps:

[0016] Step 1: Monitor the pressure values ​​of each container in real time;

[0017] Step 2: When the pressure difference between any two containers exceeds a preset threshold, the balance control is triggered;

[0018] Step 3: Based on the current pressure p of the low-pressure side vessel 低压 and temperature T 低压 Dynamically calculate the pressure p that reaches the high-pressure side. 高压 Required target temperature T 目标 ;

[0019] Step 4: Adjust the heating power of the low-pressure side container to bring its temperature close to the target temperature;

[0020] Step 5: Iterate through steps 3-4 until the pressure difference returns to within the threshold.

[0021] Optionally, the triggering condition for step 2 is that when the calculation control unit detects that the numerical difference Δp1 between the first pressure gauge and the second pressure gauge reaches p, the calculation control unit issues an audible and visual alarm and prompts "pressure difference of the feeding container exceeds the limit".

[0022] Optionally, the target temperature calculation in step 3 satisfies the following relationship:

[0023] T 目标 =T 低压 +k·(p 高压 -p 低压 ),

[0024] Where k is a compensation coefficient related to the characteristics of the working fluid inside the container.

[0025] Optionally, the compensation coefficient k in step 3 is determined by the ideal gas law, satisfying... Where V is the container volume and nR is the gas constant.

[0026] Optionally, the judgment basis of step 5 is to calculate whether the pressure difference of the feeding container is qualified based on whether the pressure difference Δp2 between the first pressure gauge and the second pressure gauge is less than the standard p.

[0027] The beneficial technical effects of this application are as follows:

[0028] This application provides a pressure balance control method and system for feeding containers, applicable to at least two feeding containers connected in parallel. The system can monitor the pressure value of each container in real time; when the pressure difference between any two containers exceeds a preset threshold, balance control is triggered; based on the current pressure and temperature of the low-pressure side container, the target temperature required to reach the high-pressure side pressure is dynamically calculated; the heating power of the low-pressure side container is adjusted to bring its temperature closer to the target temperature; the steps are iteratively executed until the pressure difference returns to within the threshold. This application solves the problem that pouring material into the two heating containers during the 50℃ constant temperature stage before feeding may exceed the filling limit, eliminating safety hazards; it solves the problem that pouring material during heating and purification affects the judgment of whether purification is qualified and affects purification time, improving work efficiency; and it solves the problem that large weight deviations in the later stages of feeding affect container removal, increasing container turnaround time and reducing turnaround efficiency, reducing the labor costs increased by multiple container turnarounds. Attached Figure Description

[0029] Figure 1 A schematic diagram of a pressure balance control system for a uranium enrichment plant feed container provided in an embodiment of this application;

[0030] Figure 2 A flowchart illustrating a pressure balance control method for a uranium enrichment plant feed container, provided as an embodiment of this application;

[0031] In the picture:

[0032] 1—First electronic scale; 2—First feeding container; 3—First heating element; 4—First heating chamber; 5—First temperature probe; 6—First feeding pipe; 7—First pressure gauge; 8—Second pressure gauge; 9—Second feeding pipe; 10—Second temperature probe; 11—Second feeding container; 12—Second electronic scale; 13—Second heating element; 14—Calculation and control unit. Detailed Implementation

[0033] To enable those skilled in the art to better understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] See Figure 1-2 The figure shows a pressure balance control system and method for a feeding container provided in an embodiment of this application.

[0035] This application provides a pressure balance control system for a uranium enrichment plant feed container, the control system including a feed container module, a pressure monitoring module, a temperature control module, and a calculation and control unit 14;

[0036] Feeding container module: The first feeding container 2 and the second feeding container 11 are set in parallel and placed in independent heating boxes 4 respectively, and are connected to the purification pipeline through feeding pipes 6 and 9;

[0037] Pressure monitoring module: includes a first pressure gauge 7 and a second pressure gauge 8 installed on the feeding pipe 6 and the feeding pipe 9, for real-time monitoring of the pressure of the first feeding container 2 and the second feeding container 11;

[0038] The outlets of the first feeding container 2 and the second feeding container 11 are respectively connected to one end of the feeding pipe 6 and the feeding pipe 9, and the other end is connected to the purification pipeline or the feeding pipeline; the first pressure gauge 7 and the second pressure gauge 8 are respectively externally connected to the pipe wall of the feeding pipe 6 and the feeding pipe 9.

[0039] Temperature control module: includes a first temperature probe 5 and a second temperature probe 10 installed in the heating box 4 of the first feeding container 2 and the second feeding container 11, as well as a first heating element 3 and a second heating element 13 that are independently controlled;

[0040] The first temperature probe 5 and the second temperature probe 10 are respectively connected above the first feeding container 2 and the second feeding container 11, and the first heating element 3 and the second heating element 13 are respectively placed on the inner wall of the heating box 4.

[0041] The calculation control unit 14 monitors the pressure difference between the two containers in real time and identifies the container pair whose pressure difference exceeds the limit; based on the real-time status parameters of the low-pressure side container, it calculates the target temperature and outputs a power adjustment command to the heating element on the low-pressure side.

[0042] In one example, the computing control unit 14 employs a distributed control system (DCS), and its execution logic includes:

[0043] When the pressure difference exceeds the limit, a prompt will pop up saying "Pressure balance control operation of the feeding container has started".

[0044] Once the pressure balancing is complete, a message will pop up saying "Container pressure balancing operation completed".

[0045] In another example, the calculation control unit 14 automatically reads the pressure of the first pressure gauge 7 and the second pressure gauge 8; and reads the temperature of the first temperature probe 5 and the second temperature probe 10.

[0046] In one example, the first feeding container 2 and the second feeding container 11 are each equipped with an independent weighing unit, and the weighing data is used to assist in pressure balance verification.

[0047] This application also provides a method for pressure balance control of a uranium enrichment plant feed container, including the following steps:

[0048] Step 1: Monitor the pressure values ​​of each container in real time;

[0049] Step 2: When the pressure difference between any two containers exceeds a preset threshold, the balance control is triggered;

[0050] Step 3: Based on the current pressure p of the low-pressure side vessel 低压 and temperature T 低压 Dynamically calculate the pressure p that reaches the high-pressure side. 高压 Required target temperature T 目标 ;

[0051] Step 4: Adjust the heating power of the low-pressure side container to bring its temperature close to the target temperature;

[0052] Step 5: Iterate through steps 3-4 until the pressure difference returns to within the threshold.

[0053] In one example, the triggering condition for step 2 is that when the calculation control unit 14 detects that the numerical difference Δp1 between the first pressure gauge 7 and the second pressure gauge 8 reaches p, the calculation control unit 14 issues an audible and visual alarm and prompts "the pressure difference of the feeding container exceeds the limit".

[0054] In another example, the target temperature calculation in step 3 satisfies the following relationship:

[0055] T 目标 =T 低压 +k·(p 高压 -p 低压 ),

[0056] Where k is a compensation coefficient related to the characteristics of the working fluid inside the container.

[0057] As one possible approach, the compensation coefficient k in step 3 is determined using the ideal gas law, satisfying... Where V is the container volume and nR is the gas constant.

[0058] In one example, the judgment basis of step 5 is to calculate whether the pressure difference of the feeding container is qualified based on whether the pressure difference Δp2 between the first pressure gauge 7 and the second pressure gauge 8 is less than the standard p.

[0059] In a specific example, the pressure balance control method includes the following steps:

[0060] Step 1: Determine whether to start executing the pressure balance control program.

[0061] 1.1 When the control system 14 detects that the difference Δp1 between the values ​​of the first pressure gauge 7 and the second pressure gauge 8 reaches p, the control system 14 issues an audible and visual alarm and prompts "Pressure difference of the feeding container exceeds the limit";

[0062] 1.2 The control system 14 issues an audible and visual alarm and, upon confirmation by the operator, begins execution of the pressure balance control program;

[0063] Step 2: Automatically adjust and balance the pressure of the two containers

[0064] 2.1 The control system 14 automatically reads the pressure (low pressure P1, high pressure P2) of the first pressure gauge 7 and the second pressure gauge 8. It also reads the temperature (low temperature T1, high temperature T2) of the first temperature probe 5 and the second temperature probe 10.

[0065] 2.2 The control system 14 calculates the temperature T3 required for the pressure on the low-pressure side P1 to reach the pressure on the high-pressure side P2. Based on T3, the target temperature to be heated is calculated as T1+T3.

[0066] According to the ideal gas law: PV = nRT

[0067] Given P1V = nRT1 and P2V = nRT2,

[0068] Target temperature:

[0069] 2.3 The control cabinet begins to increase the output power of the heating element in the low-temperature T1 side heating box, and the heating element operates according to the heating mode;

[0070] Step 3: Determine if the pressure difference of the feeding container is within acceptable limits.

[0071] 3.1 Once the temperature T1 = T2, reduce the heating power;

[0072] 3.2 Control System 14 determines whether the pressure difference of the feeding container is qualified based on whether the pressure difference Δp2 between the first pressure gauge 7 and the second pressure gauge 8 is less than the standard p.

[0073] Step 4: Confirm whether to repeat the procedure:

[0074] 4.1 If the pressure difference of the feeding container is not up to standard, the procedure shall continue from step 2.1;

[0075] 4.2 If the pressure difference of the feeding container is qualified, proceed to the next step;

[0076] Step 5: Confirm that the pressure balance control procedure has been completed.

[0077] 5.1 The control system 14 automatically reads the pressure difference Δp between the first pressure gauge 7 and the second pressure gauge 8;

[0078] 5.2 Control system 14 confirms that the pressure difference of the feeding container is qualified based on the change value Δp3 being less than the standard p;

[0079] 5.3 The control system 14 issues an audible and visual alarm and the operator confirms that the pressure balance control program has been completed.

[0080] This application's embodiments solve the problem that pouring material into the two heating containers during the 50℃ constant temperature stage before feeding may exceed the filling limit, thus eliminating safety hazards; it also solves the problem that pouring material during heating and purification affects the judgment of whether the purification is qualified and affects the purification time, thereby improving work efficiency; and it solves the problem that large weight deviations in the later stages of feeding affect container exit, increasing container turnaround time and reducing turnaround efficiency, thereby reducing the labor costs increased by multiple container turnarounds.

[0081] The present application has been described in detail above with reference to the accompanying drawings and embodiments. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application. All content not described in detail in this application can be derived from existing technology.

Claims

1. A pressure balance control system for a uranium enrichment plant feed container, characterized in that, include: Feeding container module, pressure monitoring module, temperature control module, calculation and control unit (14); Feeding container module: includes a first feeding container (2) and a second feeding container (11) arranged in parallel, which are placed in independent heating boxes (4) and connected to the purification pipeline through feeding pipes; Pressure monitoring module: includes a first pressure gauge (7) and a second pressure gauge (8) installed on the feeding pipeline, respectively, for real-time monitoring of the pressure of the first feeding container (2) and the second feeding container (11); Temperature control module: includes a first temperature probe (5) and a second temperature probe (10) installed in the heating box (4) of the first feeding container (2) and the second feeding container (11), as well as a first heating element (3) and a second heating element (13) that are independently controlled; the first temperature probe (5) and the second temperature probe (10) are used to monitor the temperature of the first feeding container (2) and the second feeding container (11) in real time, respectively, and the first heating element (3) and the second heating element (13) are used to control the temperature of the first feeding container (2) and the second feeding container (11) respectively. The calculation control unit (14) monitors the pressure difference between the first feeding container (2) and the second feeding container (11) in real time, identifies the container pair whose pressure difference exceeds the limit, calculates the target temperature based on the real-time status parameters of the low-pressure side container, and outputs a power adjustment command to the low-pressure side heating element.

2. The pressure balance control system for the uranium enrichment plant feed container according to claim 1, characterized in that: The computing control unit (14) adopts a distributed control system (DCS), and its execution logic includes: When the pressure difference exceeds the limit, a prompt will pop up saying "Pressure balance control operation of the feeding container has started"; Once the pressure balancing is complete, a message will pop up saying "Container pressure balancing operation completed".

3. The pressure balance control system for the uranium enrichment plant feed container according to claim 1, characterized in that: The calculation control unit (14) automatically reads the pressure of the first pressure gauge (7) and the second pressure gauge (8); and reads the temperature of the first temperature probe (5) and the second temperature probe (10).

4. The pressure balance control system for the uranium enrichment plant feed container according to claim 1, characterized in that: The first feeding container (2) and the second feeding container (11) are each equipped with an independent weighing unit, and the weighing data is used to assist in pressure balance verification.

5. A method for pressure balance control of a feed container in a uranium enrichment plant, characterized in that, Includes the following steps: Step 1: Monitor the pressure values ​​of each container in real time; Step 2: When the pressure difference between any two containers exceeds a preset threshold, the balance control is triggered; Step 3: Based on the current pressure p of the low-pressure side vessel 低压 and temperature T 低压 Dynamically calculate the pressure p that reaches the high-pressure side. 高压 Required target temperature T 目标 ; Step 4: Adjust the heating power of the low-pressure side container to bring its temperature close to the target temperature; Step 5: Iterate through steps 3-4 until the pressure difference returns to within the threshold.

6. The method for pressure balance control of a uranium enrichment plant feed container according to claim 5, characterized in that, The triggering condition for step 2 is that when the calculation control unit (14) detects that the numerical difference Δp1 between the first pressure gauge (7) and the second pressure gauge (8) reaches p, the calculation control unit (14) issues an audible and visual alarm and prompts "the pressure difference of the feeding container exceeds the limit".

7. The pressure balance control method for the feed container of a uranium enrichment plant according to claim 5, characterized in that: The target temperature calculation in step 3 satisfies the following relationship: T 目标 =T 低压 +k·(p 高压 -p 低压 ), Where k is a compensation coefficient related to the characteristics of the working fluid inside the container.

8. The pressure balance control method for the feed container of a uranium enrichment plant according to claim 7, characterized in that: The compensation coefficient k in step 3 is determined by the ideal gas law and satisfies the following conditions: Where V is the container volume and nR is the gas constant.

9. The pressure balance control method for the feed container of a uranium enrichment plant according to claim 5, characterized in that: The judgment basis of step 5 is that the calculation control unit (14) determines whether the pressure difference of the feeding container is qualified based on whether the pressure difference Δp2 of the first pressure gauge (7) and the second pressure gauge (8) is less than the standard p.

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