Concentration control method during product collection of double containers

Abstract

The invention relates to a concentration control method during product collection by double containers, which comprises the following steps of: 1, determining the control range of the bottled concentration of each bottle of product in the double containers, and formulating the control deviation of the containers; 2, calculating an instantaneous concentration control range required to be realized by each container; 3, adjusting the received material concentration value of the production line according to the result; according to the invention, the problem of product concentration control under the condition of large bottled concentration difference during double-container material collection is effectively solved, frequent adjustment of product production process control is reduced, accurate control of product concentration is realized, and stable operation of a production line is ensured.

Description

Technical Field

[0001] This patent relates to the field of isotope separation technology, and specifically to a concentration control method when collecting products in double containers. Background Art

[0002] The general increase in the scale of newly built production lines has led to a large product flow rate. Under the traditional single container material collection, the product material cannot be fully frozen and enters the back-end purification container in large quantities, requiring secondary processing. In order to avoid unnecessary product losses, multiple containers must be used to work simultaneously to increase the refrigeration area to ensure sufficient freezing of the product material. Combined with the general scale of newly built production lines, two containers are generally used to collect materials at the same time to meet the product collection needs of existing production lines.

[0003] The collection of product material is a continuous process. The concentration of product material entering the container at each moment (hereinafter referred to as instantaneous concentration, c 瞬 As the production line control parameters and external environment change, the fluctuation range will continue to fluctuate, and the fluctuation range is 10 times the customer's allowable deviation. Since customers have extremely strict requirements on product quality, the average concentration in the container (hereinafter referred to as bottle concentration, c 瓶 The instantaneous concentration is calculated based on the accumulated amount of product in the container to ensure that the filling concentration of each container is within the deviation range allowed by the customer.

[0004] The traditional method uses the solute concentration calculation formula (1) to obtain the average instantaneous concentration that the product needs to achieve in the later stage of production, and then adjusts the system production process to make the product instantaneous concentration reach this value.

[0005]

[0006] m 瓶 — the quality of the product currently in the container;

[0007] m 0 ——Target receiving weight of container;

[0008] c 瓶 - the bottled concentration of the product currently in the container;

[0009] c 0 - target concentration of the product at the time of delivery;

[0010] ——The instantaneous concentration to which the product needs to be adjusted;

[0011] The above control method has a good effect on the control of the average concentration in a single product container. However, during the dual-container material collection process, due to the difference in the refrigeration capacity of each container, the two containers have different material collection amounts per unit time, resulting in inconsistent bottled concentrations. Using this method will result in two different instantaneous concentration control values. Especially when the bottled concentration deviation of the accumulated materials in the two containers is large, it is very easy to have control requirements in opposite directions. This method cannot meet the control requirements of dual containers at the same time. Summary of the invention

[0012] The purpose of the present invention is to provide a method for controlling the concentration of a dual-container product, by adjusting the target concentration value of the container to the upper and lower limits of daily control, thereby widening the adjustment range of the instantaneous concentration, comparing the instantaneous concentration with the calculated adjustment range of the two-bottle container, and obtaining an instantaneous value that simultaneously meets the control requirements of the two-bottle container, and through precise adjustment, reducing the adjustment frequency of the product production process, ensuring stable control of the production line.

[0013] The technical solution of the present invention is as follows: A method for controlling the concentration of a product when receiving it in a double container, comprising the following steps:

[0014] Step 1: Determine the control range of the product concentration in each container in the double container, formulate the control deviation Δc of the container, and set the target values ​​of the product concentration of containers A and B respectively. At this time, the control ranges of the bottled concentrations of containers A and B are

[0015] Step 2: Calculate the instantaneous concentration control range that needs to be achieved in each container; in container A:

[0016]

[0017] In formula (1):

[0018] ——The lower limit of the instantaneous concentration of the product in container A;

[0019] ——The upper limit of the instantaneous concentration of the product in container A;

[0020] m 0 A ——Total mass of materials required to be delivered to container A;

[0021] ——The mass of material in container A at a certain moment

[0022] ——Concentration of collected material in container A at a certain moment

[0023] In container B:

[0024]

[0025] In formula (2):

[0026] ——The lower limit of the instantaneous concentration of the product in container B that needs to be controlled;

[0027] ——The upper limit that the instantaneous concentration of the product in container B needs to reach;

[0028] m 0 B ——Total mass of materials required to be delivered by B container;

[0029] ——The mass of material in container B at a certain moment;

[0030] ——Concentration of collected material in container B at a certain moment

[0031] Step 3: Use container A or container B to collect the solution in the production line and record the instantaneous concentration value C of the collected solution at a certain moment. 瞬 , C 瞬 Compared with the formula (1) and (2) Compare the values, with the maximum, second maximum, second minimum, and minimum values ​​recorded as Cmax, Csmax, Csmin, and Cmin, respectively, and adjust the production line material concentration value based on the results.

[0032] In the step three,

[0033] If:c min <c smin <c 瞬 <c smax <c max , no adjustment is required;

[0034] If:c min <c 瞬 <c smin <c smax <c max , indicating that the instantaneous value of the production line receiving concentration is lower than the target concentration control lower limit of container A or container B. At this time, the production line receiving concentration value is adjusted to c smin ;

[0035] If:c 瞬 <c min <c smin <c smax <c max , indicating that the instantaneous value of the concentration of the collected materials in the production line has been lower than the target control lower limit of both containers A and B. At this time, the concentration value of the collected materials in the production line is adjusted to csmin ;

[0036] If:c min <c smin <c smax <c 瞬 <c max , indicating that the instantaneous value of the concentration of the collected material in the production line has exceeded the target control upper limit of container A or container B. At this time, the concentration value of the collected material in the production line is adjusted to c smax ;

[0037] If:c min <c smin <c smax <c max <c 瞬 , indicating that the instantaneous value of the concentration of the collected materials in the production line is higher than the target control upper limit of both containers A and B. At this time, the instantaneous concentration value of the collected materials in the production line is adjusted to c smax .

[0038] The concentration of the material received on the production line can be adjusted by adjusting the control value of the pressure equipment.

[0039] ΔC A , ΔC B ±0.015%, product concentration target value C 0 Both are 3.700%, that is It is 3.700%.

[0040] c 瞬 3.660%, container A has received the material The current bottled concentration is 2650kg 3.708%; container B has been filled The current bottled concentration is 345kg 3.695%; final container delivery volume m 0 A 6000kg, m 0 B It is 7000kg.

[0041] ΔC A , ΔC B ±0.02%; It is 3.700%.

[0042] c 瞬 3.600%, container A has received the material The current bottled concentration is 2650kg 3.700%; container B has been filled The current bottled concentration is 345kg 3.695%; final container delivery volume m0 A 6000kg, m 0 B It is 7000kg.

[0043] The significant effect of the present invention is that it effectively solves the problem of product concentration control when the bottle concentration is greatly different when collecting materials in double containers, reduces the frequent adjustment of product production process control, realizes accurate control of product concentration, and ensures the stable operation of the production line. DETAILED DESCRIPTION

[0044] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The present invention provides a method for controlling the concentration of a dual-container product. The method expands the adjustment range of the instantaneous concentration by adjusting the target concentration value of the container to the upper and lower limits of daily control, compares the instantaneous concentration with the calculated adjustment range of the two-bottle container, and obtains an instantaneous value that simultaneously meets the control requirements of the two-bottle container. Through precise adjustment, the adjustment frequency of the product production process is reduced, thereby ensuring stable control of the production line.

[0048] The technical solution adopted by the present invention comprises the following steps:

[0049] Step 1: Determine the control range of the product concentration in each container of the double container (including container A and container B), formulate the control deviation Δc of the container according to the quality control requirements of the product, and obtain the control range of the product concentration in each container. Let the target values ​​of the product concentrations of containers A and B be At this time, the control ranges of the bottled concentrations of containers A and B are

[0050] Step 2: Calculate the instantaneous concentration control range required for each container

[0051] According to the target control range of the bottled product concentration of containers A and B, the instantaneous concentration control range of each container is calculated by combining the following formula;

[0052] In container A:

[0053]

[0054] In formula (1):

[0055] ——The lower limit of the instantaneous concentration of the product in container A;

[0056] ——The upper limit of the instantaneous concentration of the product in container A;

[0057] m 0 A ——Total mass of materials required to be delivered to container A;

[0058] ——The mass of material in container A at a certain moment

[0059] ——Concentration of collected material in container A at a certain moment

[0060] In container B:

[0061]

[0062] In formula (2):

[0063] ——The lower limit of the instantaneous concentration of the product in container B that needs to be controlled; ——The upper limit of the instantaneous concentration of the product in container B that needs to be controlled; m 0 B ——Total mass of materials required to be delivered by B container;

[0064] ——The mass of material in container B at a certain moment;

[0065] ——Concentration of collected material in container B at a certain moment

[0066] Step 3: Use container A or container B to collect the solution in the production line and record the instantaneous concentration value C of the collected solution at a certain moment. 瞬 , C 瞬 Compared with the formula (1) and (2) Compare the sizes, where the maximum value, the second largest value, the second smallest value, and the minimum value are recorded as Cmax, Csmax, Csmin, and Cmin respectively;

[0067] If:c min <c smin <c 瞬 <c smax <c max , no adjustment is required;

[0068] If:c min <c 瞬 <c smin <c smax <c max , indicating that the instantaneous value of the production line receiving concentration is lower than the target concentration control lower limit of container A or container B. At this time, the production line receiving concentration value is adjusted to c smin ; (The instantaneous concentration can be adjusted by adjusting the pressure device control value)

[0069] If:c 瞬 <c min <c smin <c smax <c max , indicating that the instantaneous value of the concentration of the collected materials in the production line has been lower than the target control lower limit of both containers A and B. At this time, the concentration value of the collected materials in the production line is adjusted to c smin ;

[0070] If:c min <c smin <c smax <c 瞬 <c max , indicating that the instantaneous value of the concentration of the collected material in the production line has exceeded the target control upper limit of container A or container B. At this time, the concentration value of the collected material in the production line is adjusted to c smax ;

[0071] If:c min <c smin <c smax <c max <c 瞬 , indicating that the instantaneous value of the concentration of the collected materials in the production line is higher than the target control upper limit of both containers A and B. At this time, the instantaneous concentration value of the collected materials in the production line is adjusted to c smax .

[0072] Where: c min for The minimum value in ;

[0073] c smin for The second smallest value in ;

[0074] c smax for The second largest value in ;

[0075] c max for The maximum value in ;

[0076] Example: Take the concentration adjustment control of a production line as an example.

[0077] Step 1: Determine the control range of the bottled concentration of each container product

[0078] According to the customer's requirements, the allowable deviation ΔC of the bottled concentration control of this batch of product substances is 0.015%, so ΔC A , ΔC B ±0.015%. Product concentration target value C 0 Both are 3.700%, that is 3.700%

[0079] Step 2: Calculate the instantaneous concentration control range required for each container

[0080] It is known that the instantaneous concentration of the product at this time is c 瞬 3.660%, container A has received the material The current bottled concentration is 2650kg 3.708%; container B has been filled The current bottled concentration is 345kg 3.695%; final container delivery volume m 0 A 6000kg, m 0 B The instantaneous concentration control range of each container is calculated according to the formula.

[0081]

[0082] Step 3: Compare the current instantaneous concentration with the target instantaneous concentration of each container and determine the instantaneous concentration adjustment value

[0083] By comparing the size relationship between the four values At this time, the instantaneous value c 瞬 is 3.660%, which satisfies This indicates that the instantaneous concentration is lower than the lower control limit of the instantaneous concentration of both containers A and B. At this time, the instantaneous concentration value of the production line is adjusted to The control requirements of two containers can be met at the same time.

[0084] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for controlling the concentration of a product when receiving it in a double container, characterized in that: The following steps are involved: Step 1: Determine the control range of the product concentration in each container in the double container, formulate the control deviation Δc of the container, and set the target values ​​of the product concentration of containers A and B respectively. At this time, the control ranges of the bottled concentrations of containers A and B are Step 2: Calculate the instantaneous concentration control range that needs to be achieved in each container; in container A: In formula (1): ——The lower limit of the instantaneous concentration of the product in container A; ——The upper limit of the instantaneous concentration of the product in container A; m0 A ——Total mass of materials required to be delivered to container A; ——The mass of material in container A at a certain moment; ——The concentration of collected material in container A at a certain moment; In container B: In formula (2): ——The lower limit of the instantaneous concentration of the product in container B that needs to be controlled; ——The upper limit that the instantaneous concentration of the product in container B needs to reach; m0 B ——Total mass of materials required to be delivered by container B; ——The mass of material in container B at a certain moment; ——Concentration of collected material in container B at a certain moment; Step 3: Use container A or container B to collect the solution in the production line and record the instantaneous value C of the collected solution concentration at a certain moment. 瞬 , C 瞬 Compared with the formula (1) and (2) A size comparison is performed, with the maximum value, second largest value, second smallest value, and minimum value being recorded as Cmax, Csmax, Csmin, and Cmin respectively, and the production line receiving concentration value is adjusted based on the results.

2. The method for controlling the concentration of a product when receiving the product in a double container according to claim 1, characterized in that: In the step three: If:c min <c smin <c 瞬 <c smax <c max , no adjustment is required; If:c min <c 瞬 <c smin <c smax <c max , adjust the production line receiving material concentration value to c smin ; If:c 瞬 <c min <c smin <c smax <c max , adjust the production line receiving material concentration value to c smin ; If:c min <c smin <c smax <c 瞬 <c max , adjust the material concentration value in the production line to c smax ; If:c min <c smin <c smax <c max <c 瞬 , adjust the instantaneous concentration value of the production line to c smax .

3. The method for controlling the concentration of a product when receiving the product in a double container according to claim 2, characterized in that: The concentration of the material received on the production line can be adjusted by adjusting the control value of the pressure equipment.

4. The method for controlling the concentration of a product when receiving the product in a double container according to claim 1, characterized in that: ΔC A , ΔC B The product concentration target value C0 is 3.700%, that is, It is 3.700%.

5. The method for controlling the concentration of a product when receiving the product in a double container according to claim 1, characterized in that: c 瞬 3.660%, container A has received the material The current bottled concentration is 2650kg 3.708%; container B has been filled The current bottled concentration is 345kg 3.695%; final container delivery volume m0 A 6000kg, m0 B It is 7000kg.

6. The method for controlling the concentration of a product when receiving the product in a double container according to claim 1, characterized in that: ΔC A , ΔC B ±0.02%; It is 3.700%.

7. The method for controlling the concentration of a product when receiving the product in a double container according to claim 1, characterized in that: c 瞬 3.600%, container A has received the material The current bottled concentration is 2650kg 3.700%; container B has been filled The current bottled concentration is 345kg 3.695%; final container delivery volume m0 A 6000kg, m0 B It is 7000kg.

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