Method for automatically judging evaporation end point of waste liquid, and method and device for controlling evaporation of waste liquid

Abstract

The invention relates to the technical field of high-level liquid waste evaporation in nucleation post-treatment and nucleation glass curing, in particular to a liquid waste evaporation end point automatic judgment method and a liquid waste evaporation control method and device. The method comprises the following steps: acquiring waste liquid parameters of an evaporation system before evaporation and target parameters of waste liquid in a kettle type evaporator after evaporation; determining the target liquid level in the stock solution tank after evaporation according to the mass of the standard substance before evaporation calculated according to the waste liquid parameters, the target parameters of the waste liquid and the mass conservation of the standard substance before and after evaporation; according to the method, the mass of the standard substance of the waste liquid in the evaporation process is analyzed, and the evaporation end point is determined through mass conservation of the standard substance before and after evaporation, so that the evaporation end point can be automatically determined by analyzing the parameters of the waste liquid in the evaporation system, and the efficiency of the evaporation system is improved. Meanwhile, the evaporation end point is determined based on mass analysis and calculation of the target substance, so that the determination of the evaporation end point is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of evaporation of high-level radioactive waste liquid in nuclear post-processing and nuclear glass solidification, and in particular to an automatic determination method for an end point of waste liquid evaporation, and a waste liquid evaporation control method and device. Background Art

[0002] Radioactive waste refers to waste that contains or is contaminated by radionuclides, whose radionuclide concentration or specific activity is greater than the clean clearance level determined by the state, and is not expected to be used anymore. Radioactive waste can be divided into exempted waste, low-level radioactive waste, intermediate-level radioactive waste and high-level radioactive waste according to radioactivity. At the same time, radioactive waste can be divided into gaseous waste, liquid waste and solid waste according to physical properties.

[0003] Based on this, waste liquids from nuclear reactors, nuclear fuel cycle facilities, nuclear research institutions, etc. can be classified as medium-level radioactive waste liquid or high-level radioactive waste liquid (hereinafter referred to as medium- and high-level radioactive waste liquid) among radioactive wastes. This waste liquid has the characteristics of high radioactivity, complex nuclides, and difficulty in treatment. At present, the treatment methods of medium- and high-level radioactive waste liquid mainly include evaporation concentration, solidification, and neutralization storage. However, in the process of evaporation concentration, observation or temperature measurement is usually used to determine the evaporation end point, which cannot achieve accurate and automatic determination of the evaporation end point. Summary of the invention

[0004] In view of this, the present invention provides a method for automatically determining the end point of waste liquid evaporation, a method and a device for controlling the evaporation of waste liquid, so as to solve the problem that the prior art cannot accurately and automatically determine the end point of evaporation.

[0005] In the first aspect, the present invention provides a method for automatically determining the end point of waste liquid evaporation, which is applied to an evaporation system, wherein the evaporation system includes a raw liquid tank and a kettle evaporator, the waste liquid includes a target substance, and the mass of the target substance is conserved before and after evaporation. The method includes: obtaining waste liquid parameters of the evaporation system before evaporation and target parameters of the waste liquid in the kettle evaporator after evaporation; determining the target liquid level in the raw liquid tank after evaporation based on the mass of the target substance before evaporation calculated from the waste liquid parameters, the target parameters of the waste liquid, and the conservation of mass of the target substance before and after evaporation; and determining the evaporation end point of the evaporation system based on the target liquid level.

[0006] The method for automatically determining the end point of waste liquid evaporation provided in an embodiment of the present invention analyzes the mass of a target substance in the waste liquid during the evaporation process, and determines the evaporation end point by the conservation of mass of the target substance before and after evaporation. Therefore, the method can automatically determine the evaporation end point by analyzing the waste liquid parameters in the evaporation system. At the same time, the method determines the evaporation end point based on the mass analysis and calculation of the target substance when determining the evaporation end point, thereby making the determination of the evaporation end point more accurate.

[0007] In an optional embodiment, the waste liquid parameters include a first liquid level, a first density and a first concentration of the target substance in the original liquid tank before evaporation, a second liquid level, a second density and a second concentration of the target substance in the kettle evaporator, and the waste liquid target parameters include a target density and a target concentration of the target substance in the kettle evaporator after evaporation, the density and the concentration of the target substance in the original liquid tank remain unchanged before and after evaporation, and the kettle evaporator adopts a continuous evaporation method; according to the mass of the target substance before evaporation calculated by the waste liquid parameters, the waste liquid target parameters and the mass conservation before and after evaporation of the target substance, determining the target liquid level in the original liquid tank after evaporation, including: performing volume-liquid level calibration on the original liquid tank and the kettle evaporator, determining a first function between the volume and liquid level of the waste liquid in the original liquid tank and the kettle evaporator. a second function between the volume of the waste liquid in the kettle evaporator and the liquid level; determining the first volume of the original liquid tank before evaporation and the second volume of the kettle evaporator according to the first liquid level and the first function as well as the second liquid level and the second function; determining the mass of the target substance before evaporation according to the sum of the product of the first volume, the first density and the first concentration of the target substance and the product of the second volume, the second density and the second concentration of the target substance; determining the mass of the target substance in the kettle evaporator after evaporation according to the product of the second volume, the target density and the target concentration of the target substance; determining the target liquid level in the original liquid tank after evaporation according to the ratio of the difference between the mass of the target substance before evaporation and the mass of the target substance in the kettle evaporator after evaporation to the product of the first density and the first concentration of the target substance.

[0008] In this embodiment, by calibrating the relationship between volume and liquid level, it is convenient to directly determine the volume of the waste liquid according to the liquid level; when determining the evaporation end point, the mass of the target substance before evaporation and the mass to be reached after evaporation can be determined according to the product of volume, density and concentration, respectively, and the corresponding liquid level when the target substance reaches the corresponding mass after evaporation is used as the target liquid level when reaching the evaporation end point. Therefore, the monitoring of the liquid level end point can be achieved by monitoring the liquid level of the original liquid tank.

[0009] In an optional embodiment, the target liquid level in the original liquid tank after evaporation is calculated using the following formula:

[0010] h 12 =f1 -1 (V 12 )

[0011]

[0012] In the formula, h 12 Indicates the target liquid level, V 12 Indicates the second volume, h 11 Indicates the first liquid level, h 21 represents the second liquid level, f1 represents the first function between the volume of the waste liquid in the original liquid tank and the liquid level, f2 represents the second function between the volume of the waste liquid in the kettle evaporator and the liquid level, represents the inverse function of the first function f1, ρ 22 represents the target density, ρ 21 represents the second density, ρ 11 represents the first density, C 22 Indicates the target concentration of the target substance, C 21 Indicates the second concentration of the target substance, C 11 Indicates the first concentration of the target substance.

[0013] In this embodiment, through the above calculation formula, as long as the relevant parameters are obtained, the target liquid level can be directly and accurately calculated, which provides a data basis for the calculation of the target liquid level.

[0014] In an optional embodiment, the evaporation system also includes: a condensation tank, and the method also includes: obtaining the concentration of the target substance in the condensation tank before and after evaporation; determining whether the concentration of the target substance before evaporation is less than a threshold value; when the concentration of the target substance before evaporation is greater than or equal to the threshold value, processing the condensation tank until the concentration of the target substance in the condensation tank is less than the threshold value; when the concentration of the target substance after evaporation is greater than or equal to the threshold value, verifying whether the concentration of the target substance in the kettle evaporator reaches the target concentration.

[0015] In this embodiment, since in actual conditions the concentration of the target substance in the condensation tank should be approximately zero, the concentration of the target substance in the condensation tank can be analyzed and calculated before and after evaporation to ensure that the concentration of the target substance in the condensation tank meets the requirements, thereby avoiding the impact of the target substance in the condensation tank on the environment.

[0016] In an optional embodiment, the method also includes: obtaining the concentration of the target substance in the kettle evaporator after evaporation; determining whether the concentration of the target substance is equal to the target concentration of the target substance; when the concentration of the target substance is equal to the target concentration of the target substance, adjusting the evaporation parameters of the kettle evaporator, and recalculating and determining the target liquid level in the original liquid tank after evaporation; repeating the above process until the concentration of the target substance in the kettle evaporator after evaporation is equal to the target concentration of the target substance.

[0017] In this embodiment, the concentration of the target substance in the kettle evaporator after evaporation is analyzed to determine whether it is equal to the target concentration. If it is not equal to the target concentration, it means that the required evaporation end point may not be reached at present. Therefore, the problem existing in the evaporation system can be analyzed, and the target liquid level corresponding to the evaporation end point can be recalculated after the problem is solved, and the evaporation operation can be re-performed. In this way, the accuracy of the evaporation end point of the evaporation process is further guaranteed.

[0018] In a second aspect, the present invention provides a waste liquid evaporation control method, which is applied to the waste liquid evaporation endpoint automatic determination method of the first aspect of the present invention and any one of the first aspects, the method comprising: controlling the steam inlet valve to open, to evaporate the waste liquid in the kettle evaporator; controlling the compressed air inlet valve to open, to transport the solution in the original liquid tank to the kettle evaporator; when the liquid level in the original liquid tank reaches the target liquid level, controlling the steam inlet valve to close, to stop evaporating the waste liquid in the kettle evaporator; controlling the compressed air inlet valve to close, to stop transporting the solution in the original liquid tank to the kettle evaporator; controlling the cooling water inlet valve to open, to cool the kettle evaporator.

[0019] In this embodiment, the evaporation process is controlled by controlling the steam inlet valve, the compressed air inlet valve, and the cooling water inlet valve, thereby realizing automatic control of the waste liquid evaporation process and improving the evaporation efficiency.

[0020] In an optional embodiment, after controlling the compressed air inlet valve to open and conveying the solution in the original liquid tank to the kettle evaporator, the method further includes: adjusting the opening of the steam inlet valve and the opening of the compressed air inlet valve so that the liquid level of the kettle evaporator is constant during the evaporation process.

[0021] In this embodiment, during the evaporation process, the opening of the steam inlet valve and the opening of the compressed air inlet valve are adjusted so that the liquid level of the kettle evaporator is constant during the evaporation process, thereby achieving the concentration control of the radioactive material in the kettle evaporator to avoid causing an unexpected critical nuclear safety accident.

[0022] In a third aspect, the present invention provides an automatic determination device for the end point of waste liquid evaporation, which is applied to an evaporation system, wherein the evaporation system includes a raw liquid tank and a kettle evaporator, the waste liquid includes a target substance, and the mass of the target substance is conserved before and after evaporation, and the device includes: a parameter acquisition module, used to obtain the waste liquid parameters of the evaporation system before evaporation and the target parameters of the waste liquid in the kettle evaporator after evaporation; a target liquid level determination module, used to determine the target liquid level in the raw liquid tank after evaporation based on the mass of the target substance before evaporation calculated by the waste liquid parameters, the target parameters of the waste liquid and the conservation of mass of the target substance before and after evaporation; and an evaporation end point determination module, used to determine the evaporation end point of the evaporation system based on the target liquid level.

[0023] In a fourth aspect, the present invention provides a waste liquid evaporation control device, which is applied to the method for automatically determining the waste liquid evaporation endpoint of the first aspect and any one of the first aspects of the present invention, and the device includes: a first control module, which is used to control the steam inlet valve to open, so as to evaporate the waste liquid in the kettle evaporator; a second control module, which is used to control the compressed air inlet valve to open, so as to transport the solution in the original liquid tank to the kettle evaporator; a third control module, which is used to control the steam inlet valve to close when the liquid level in the original liquid tank reaches the target liquid level, so as to stop evaporating the waste liquid in the kettle evaporator; a fourth control module, which is used to control the compressed air inlet valve to close, so as to stop transporting the solution in the original liquid tank to the kettle evaporator; and a fifth control module, which is used to control the cooling water inlet valve to open, so as to cool the kettle evaporator.

[0024] In a fifth aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method for automatically determining the end point of waste liquid evaporation according to the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0025] In a sixth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for automatically determining the end point of waste liquid evaporation according to the first aspect or any corresponding embodiment thereof.

[0026] In a seventh aspect, the present invention provides a computer program product, comprising computer instructions for causing a computer to execute the method for automatically determining the end point of waste liquid evaporation according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a schematic flow chart of a method for automatically determining the end point of waste liquid evaporation according to an embodiment of the present invention;

[0029] Figure 2 is a schematic flow chart of a waste liquid evaporation control method according to an embodiment of the present invention;

[0030] Figure 3 is a schematic flow chart of another waste liquid evaporation control method according to an embodiment of the present invention;

[0031] Figure 4 is a structural block diagram of a device for automatically determining the end point of waste liquid evaporation according to an embodiment of the present invention;

[0032] Figure 5 is a structural block diagram of a waste liquid evaporation control device according to an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] According to an embodiment of the present invention, an embodiment of a method for automatically determining the endpoint of waste liquid evaporation is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0036] In this embodiment, a method for automatically determining the end point of waste liquid evaporation is provided, which can be used in electronic devices such as computers, mobile phones, tablet computers, etc. Figure 1 is a flow chart of a method for automatically determining the end point of waste liquid evaporation according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0037] Step S101, obtaining waste liquid parameters of the evaporation system before evaporation and waste liquid target parameters in the kettle evaporator after evaporation.

[0038] Specifically, the method for automatically determining the end point of waste liquid evaporation can be used to determine the end point of evaporation of an evaporation system. The evaporation system can realize the evaporation of waste liquid such as medium- and high-level radioactive waste liquid. During the evaporation process of the waste liquid by the evaporation system, the method is used to automatically determine the end point of evaporation, which is convenient for subsequent treatment of the evaporated waste liquid. Among them, the evaporation system includes a stock liquid tank and a kettle evaporator, the stock liquid tank contains the waste liquid to be evaporated, the kettle evaporator is connected to the stock liquid tank, and the waste liquid in the stock liquid tank is transported to the kettle evaporator for evaporation. Among them, the waste liquid contains a target substance, and the target substance will not leak, decompose or crystallize during the evaporation process. When the waste liquid is medium- and high-level radioactive waste liquid, the target substance may be a radioactive element.

[0039] In addition, harmful substances may exist in the steam generated during the evaporation process of the kettle evaporator. In order to avoid the pollution of the environment by directly discharging the steam into the air, a condensate tank can be provided in the evaporation system, and the condensate tank is used to collect the steam condensate generated during the evaporation process of the kettle evaporator. Specifically, a condenser and a filter can be connected to the outlet of the kettle evaporator, the input end of the condenser is connected to the kettle evaporator, and the output end of the condenser is respectively connected to the condensate tank and the filter. During the evaporation process, the steam generated by the evaporation of the kettle evaporator is condensed by the condenser and enters the condensate tank, and the non-condensable gas in the steam is filtered by the filter and enters the air.

[0040] It should be noted that, under normal circumstances, the target substance in the waste liquid will not be evaporated into the condensate tank, so when the mass conservation analysis of the target substance is performed, the liquid in the condensate tank does not need to be analyzed. Therefore, in this embodiment, when analyzing according to the mass conservation before and after evaporation of the target substance, only the waste liquid parameters in the original liquid tank and the kettle evaporator can be obtained, and the waste liquid parameters can be the relevant parameters for the mass calculation of the target substance. For the target parameters of the waste liquid in the kettle evaporator after evaporation, it can be a predetermined standard that the waste liquid needs to reach after evaporation, such as a target concentration. At the same time, since this embodiment is to be analyzed based on the mass conservation of the target substance, the target concentration can be the target concentration of the target substance.

[0041] Step S102, according to the mass of the target substance before evaporation calculated by the waste liquid parameters, the waste liquid target parameters and the mass conservation of the target substance before and after evaporation, the target liquid level in the original liquid tank after evaporation is determined. Specifically, the mass of the target substance can be determined by the product of the volume of the waste liquid, the density of the waste liquid and the concentration of the target substance, and the volume of the waste liquid can be determined by the liquid level. Therefore, the mass of the target substance that should be reached after evaporation can be determined by calculating the mass of the target substance before evaporation and the mass conservation, and then the target liquid level of the waste liquid after evaporation is determined according to the mass and the target concentration that the target substance should reach after evaporation.

[0042] Step S103, determining the evaporation end point of the evaporation system based on the target liquid level. Specifically, the determined target liquid level is the liquid level when the evaporation standard, i.e., the evaporation end point, is reached, so the evaporation process can be monitored in real time, and when the liquid level reaches the target liquid level, it means that the evaporation end point has been reached.

[0043] The method for automatically determining the end point of waste liquid evaporation provided in an embodiment of the present invention analyzes the mass of a target substance in the waste liquid during the evaporation process, and determines the evaporation end point by the conservation of mass of the target substance before and after evaporation. Therefore, the method can automatically determine the evaporation end point by analyzing the waste liquid parameters in the evaporation system. At the same time, the method determines the evaporation end point based on the mass analysis and calculation of the target substance when determining the evaporation end point, thereby making the determination of the evaporation end point more accurate.

[0044] In this embodiment, a method for automatically determining the end point of waste liquid evaporation is provided, and the process includes the following steps:

[0045] Step S201, obtaining the waste liquid parameters of the evaporation system before evaporation and the target parameters of the waste liquid in the kettle evaporator after evaporation. Specifically, the waste liquid parameters include the first liquid level, the first density and the first concentration of the target substance in the original liquid tank before evaporation, the second liquid level, the second density and the second concentration of the target substance in the kettle evaporator, and the target parameters of the waste liquid include the target density and the target concentration of the target substance in the kettle evaporator after evaporation. The density and the concentration of the target substance in the original liquid tank remain unchanged before and after evaporation, and the kettle evaporator adopts a continuous evaporation method.

[0046] Among them, a liquid level meter and a density meter can be set in the original liquid tank and the kettle evaporator, and the first liquid level, the second liquid level, the first density and the second density can be collected by the liquid level meter and the density meter respectively. For the first concentration and the second concentration of the target substance, an automatic sampling device can be set in the original liquid tank and the kettle evaporator respectively, and the automatic sampling device can realize automatic sampling and analysis of the waste liquid in the original liquid tank and the kettle evaporator. Through the analysis process, the first concentration and the second concentration of the target substance can be determined. During the evaporation process, the kettle evaporator adopts a continuous evaporation method, that is, while the original liquid tank transports the original liquid to the kettle evaporator, the original liquid entering the kettle evaporator is evaporated, and the liquid level of the kettle evaporator is kept constant during the evaporation process. In addition, since the original liquid tank only holds the waste liquid to be evaporated and does not perform evaporation, the density of the waste liquid in the original liquid tank and the concentration of the target substance remain unchanged before and after evaporation.

[0047] Step S202, according to the mass of the target substance before evaporation calculated by the waste liquid parameters, the target parameters of the waste liquid, and the mass conservation of the target substance before and after evaporation, the target liquid level in the original liquid tank after evaporation is determined. It should be noted that the evaporation system in this embodiment takes the original liquid tank-kettle evaporator-condensate tank as the key node, desalinates other process structures, and at the same time, when performing quality analysis on the evaporation process, under the premise of ensuring the key parameters, minimizes the influence of unnecessary parameters on the automatic determination of the evaporation endpoint.

[0048] Specifically, the above step S202 includes:

[0049] Step S2021, calibrate the volume-liquid level of the original liquid tank and the kettle evaporator to determine the first function between the volume and liquid level of the waste liquid in the original liquid tank and the second function between the volume and liquid level of the waste liquid in the kettle evaporator; specifically, in order to avoid the problem of inconvenience in volume measurement, this embodiment determines the volume-liquid level function of the original liquid tank and the kettle evaporator by pre-calibration. The independent variable of this function is the liquid level, and the dependent variable is the volume. Therefore, after the liquid level is obtained by collecting the liquid level meter, the volume of the waste liquid therein can be directly determined by this function. Among them, the specific calibration process can be implemented with reference to the relevant technology, which will not be repeated here. The first function f1 between the volume and liquid level of the waste liquid in the original liquid tank and the second function f2 between the volume and liquid level of the waste liquid in the kettle evaporator obtained by calibration can be expressed by the following formulas respectively:

[0050] V1=f1(h1)

[0051] V2=f2(h2)

[0052] Wherein, h1 and h2 represent the liquid levels collected by the liquid level gauges in the original liquid tank and the kettle evaporator, respectively, and V1 and V2 represent the volumes of the waste liquid in the original liquid tank and the kettle evaporator, respectively.

[0053] In addition, under normal circumstances, there is no target substance in the condensation tank, so the condensation tank can be analyzed. In other cases, if the condensation tank needs to be analyzed, a level meter, a density meter, and an automatic sampling device can be set in the condensation tank for analysis.

[0054] Step S2022, respectively determine the first volume of the original liquid tank before evaporation and the second volume of the kettle evaporator according to the first liquid level and the first function and the second liquid level and the second function; specifically, after the first function and the second function are pre-calibrated and determined, before evaporation, the first liquid level of the original liquid tank and the second liquid level of the kettle evaporator can be collected by a liquid level meter, and then the first liquid level and the second liquid level are respectively substituted into the first function and the second function, so as to obtain the first volume of the original liquid tank before evaporation and the second volume of the kettle evaporator. The first volume and the second volume can be respectively expressed by the following formulas:

[0055] V 11 =f1(h 11 )

[0056] V 21 =f2(h 21 )

[0057] In the formula, h 11 and h 21 Respectively represent the liquid levels collected by the liquid level gauges in the original liquid tank and the kettle evaporator before evaporation, V 11 and V 21Respectively represent the first volume and the second volume of the waste liquid in the raw liquid tank and the kettle evaporator.

[0058] Step S2023, determining the mass of the target substance before evaporation according to the sum of the product of the first volume, the first density and the first concentration of the target substance and the product of the second volume, the second density and the second concentration of the target substance; specifically, the mass of the target substance before evaporation can be determined by the sum of the mass of the target substance in the stock liquid tank before evaporation and the mass of the target substance in the kettle evaporator. The mass of the target substance in the stock liquid tank before evaporation can be calculated using the following formula:

[0059] m 11 =V 11 ρ 11 C 11 =f1(h 11 )ρ 11 C 11

[0060] In the formula, m 11 represents the mass of the target substance in the stock tank before evaporation, ρ 11 It represents the first density of the waste liquid in the original liquid tank before evaporation, C 11 Indicates the first concentration of the target substance in the stock solution tank before evaporation.

[0061] The mass of the target substance in the kettle evaporator before evaporation can be calculated using the following formula:

[0062] m 21 =V 21 ρ 21 C 21 =f2(h 21 )ρ 21 C 21

[0063] In the formula, m 21 represents the mass of the target substance in the kettle evaporator before evaporation, ρ 21 It represents the second density of the waste liquid in the kettle evaporator before evaporation, C 21 It represents the second concentration of the target substance in the kettle evaporator before evaporation.

[0064] Step S2024, determining the mass of the target substance in the kettle evaporator after evaporation according to the product of the second volume, the target density and the target concentration of the target substance; specifically, the target concentration of the target substance is the predetermined concentration that the target substance should reach in the kettle evaporator after evaporation, and the target density can be the density corresponding to the target substance when it reaches the target concentration, which is predetermined by experiment. At the same time, since the kettle evaporator adopts a continuous evaporation mode, that is, the liquid level and volume of the kettle evaporator remain unchanged before and after evaporation. Therefore, the mass of the target substance in the kettle evaporator after evaporation can be calculated using the following formula:

[0065] m 22 =V 21 ρ 22 C 22 =f2(h 22 )ρ 22 C 22

[0066] In the formula, m 21 represents the mass of the substance in the kettle evaporator after evaporation, ρ 22 Indicates the target density of the waste liquid in the kettle evaporator after evaporation, C 22 Indicates the target concentration of the target substance in the kettle evaporator after evaporation.

[0067] Step S2025, determine the target liquid level in the original liquid tank after evaporation according to the ratio of the difference between the mass of the target substance before evaporation and the mass of the target substance in the kettle evaporator after evaporation to the product of the first density and the first concentration of the target substance. Specifically, according to the mass conservation of the target substance in the evaporation system before and after evaporation, and the concentration of the target substance in the condensate tank is zero. The following formula can be obtained:

[0068] m 11 +m 21 =m 12 +m 22

[0069] f1(h 11 )ρ 11 C 11 +f2(h 21 )ρ 21 C 21 =f1(h 12 )ρ 12 C 12 +f2(h 22 )ρ 22 C 22

[0070] In the formula, m 21 Indicates the mass of the substance in the kettle evaporator after evaporation, h 12 Indicates the target liquid level that should be reached in the original liquid tank after evaporation, ρ 12 Indicates the density of the waste liquid in the original liquid tank after evaporation, C 12 It indicates the concentration of the target substance in the original liquid tank after evaporation. Since the density and concentration of the target substance in the waste liquid in the original liquid tank remain unchanged before and after evaporation. Therefore, ρ 12 =ρ 11 , C 12 =C 11 , the target liquid level in the original liquid tank after evaporation can be calculated using the following formula:

[0071] h 12 =f1 -1 (V 12 )

[0072]

[0073] In the formula, represents the inverse function of the first function f1.

[0074] It should be noted that the units of physical quantities are not marked in the above calculation process. In actual application, the units of the same physical quantity must be the same and the same as the units required by the function.

[0075] Step S203, determining the evaporation end point of the evaporation system based on the target liquid level; see Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0076] In this embodiment, a method for automatically determining the end point of waste liquid evaporation is provided, and the method comprises the following steps:

[0077] Step S301, obtaining the waste liquid parameters of the evaporation system before evaporation and the waste liquid target parameters in the kettle evaporator after evaporation; see Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0078] Step S302, determining the target liquid level in the original liquid tank after evaporation based on the mass of the target substance before evaporation calculated by the waste liquid parameters, the waste liquid target parameters, and the mass conservation of the target substance before and after evaporation; see Figure 1 Step S102 of the illustrated embodiment will not be described in detail here.

[0079] Step S303, determining the evaporation end point of the evaporation system based on the target liquid level; see Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0080] Step S304, obtaining the concentration of the target substance in the condensation tank before and after evaporation; determining whether the concentration of the target substance before evaporation is less than a threshold value; when the concentration of the target substance before evaporation is greater than or equal to the threshold value, processing the condensation tank until the concentration of the target substance in the condensation tank is less than the threshold value; when the concentration of the target substance after evaporation is greater than or equal to the threshold value, verifying whether the concentration of the target substance in the kettle evaporator reaches the target concentration.

[0081] Specifically, under normal circumstances, the concentration of the target substance in the condensation tank before evaporation is approximately equal to 0. Therefore, before evaporation, an automatic sampling device in the condensation tank can be used to automatically sample and analyze the condensation tank to determine whether the concentration of the target substance in the condensation tank meets the requirements. When the condensation tank is contaminated or the concentration of the target substance in the condensation tank does not meet the requirements due to other reasons, the condensation tank can be processed before the evaporation operation. For example, the solution in the condensation tank is emptied and transported to the original liquid tank, and the condensation tank is cleaned with a analytical solution and then emptied as appropriate.

[0082] In addition, based on the actual engineering situation, the target substance will not leak, decompose or crystallize. Therefore, after evaporation, the concentration of the target substance in the condensate tank should also be approximately equal to 0. In this embodiment, after evaporation, the automatic sampling device in the condensate tank is also used to automatically sample and analyze the condensate tank to determine whether the concentration of the target substance in the condensate tank meets the requirements. If it does not meet the requirements, it means that the target substance may have entered the condensate tank during the evaporation process. At this time, the evaporation end point determined may be inaccurate. At this time, it can be further verified whether the concentration of the target substance in the kettle evaporator after evaporation reaches the target concentration to verify whether the evaporation end point has indeed been reached.

[0083] Step S305, obtaining the concentration of the target substance in the kettle evaporator after evaporation; determining whether the concentration of the target substance is equal to the target concentration of the target substance; when the concentration of the target substance is equal to the target concentration of the target substance, adjusting the evaporation parameters of the kettle evaporator, and recalculating and determining the target liquid level in the original liquid tank after evaporation; repeating the above process until the concentration of the target substance in the kettle evaporator after evaporation is equal to the target concentration of the target substance.

[0084] Specifically, after reaching the evaporation endpoint, the concentration of the target substance in the kettle evaporator should reach the target concentration. Therefore, after evaporation, the automatic analysis device in the kettle evaporator can be used to perform concentration analysis on the target substance to determine whether the concentration of the target substance has reached the target concentration. When the concentration of the target substance has not reached the target concentration, the evaporation system can be further analyzed to determine whether there are any problems, such as whether the liquid level of the kettle evaporator is constant, etc. After solving the existing problems, the evaporation endpoint can be re-determined and the evaporation operation can be performed again until the concentration of the target substance in the kettle evaporator reaches the target concentration after evaporation.

[0085] This embodiment provides a waste liquid evaporation control method, which is applied to the waste liquid evaporation endpoint automatic determination method of the above embodiment, such as Figure 2 As shown, the method comprises the following steps:

[0086] Step S401, control the steam inlet valve to open, and evaporate the waste liquid in the kettle evaporator; specifically, the steam inlet valve is set between the kettle evaporator and the condensate tank. When evaporation is required, the steam inlet valve is opened and the kettle evaporator is heated, and the steam generated after evaporation enters the condensate tank through the steam inlet valve. In addition, during evaporation, it is also necessary to confirm that the cooling water valve is in a closed state.

[0087] Step S402, control the compressed air inlet valve to open, and transport the solution in the original liquid tank to the kettle evaporator; specifically, during evaporation, it is necessary to further open the compressed air inlet valve, and use an air lift to transport the solution in the original liquid tank to the kettle evaporator. In addition, in order to control the concentration of radioactive substances in the kettle evaporator to avoid causing an unexpected critical nuclear safety accident, the kettle evaporator can adopt a continuous evaporation mode, that is, the liquid level in the kettle evaporator needs to be maintained constant during the evaporation process. Therefore, in this embodiment, after opening the steam inlet valve and the compressed air inlet valve, the opening of the steam inlet valve and the opening of the compressed air inlet valve can be adjusted to control the liquid level of the kettle evaporator. Among them, adjusting the opening of the steam inlet valve can adjust the evaporation flow of the kettle evaporator, and adjusting the opening of the compressed air inlet valve can adjust the flow of the liquid in the original liquid tank into the kettle evaporator. In practical applications, the adjustment of the opening of each valve can be achieved by PID control.

[0088] Step S403, when the liquid level in the original liquid tank reaches the target liquid level, the steam inlet valve is controlled to close, and the evaporation of the waste liquid in the kettle evaporator is stopped.

[0089] Step S404, controlling the compressed air inlet valve to close, and stopping the delivery of the solution in the stock liquid tank to the kettle evaporator.

[0090] Step S405, controlling the cooling water inlet valve to open, and performing cooling operation on the kettle evaporator.

[0091] Specifically, during the evaporation process, the liquid level in the original liquid tank can be monitored in real time. When the liquid level reaches the target level, it means that the evaporation end point has been reached. At this time, the steam inlet valve can be controlled to close to stop evaporating the waste liquid in the kettle evaporator, and the compressed air inlet valve can be controlled to close to stop transporting the solution in the original liquid tank to the kettle evaporator. The cooling water inlet valve is controlled to open to cool the kettle evaporator. When the kettle evaporator temperature is cooled to the set temperature, the cooling water inlet valve is closed.

[0092] As a specific application example of the embodiment of the present invention, Figure 3 As shown, the waste liquid evaporation control method can be implemented by the following process:

[0093] Use a level meter and a density meter to obtain the waste liquid parameters of the evaporation system before evaporation, and determine the target concentration of the target substance in the kettle evaporator after evaporation. According to the mass of the target substance before evaporation calculated by the waste liquid parameters, the target parameters of the waste liquid, and the mass conservation before and after evaporation of the target substance, determine the waste liquid volume of the original liquid tank after evaporation, and further determine the target liquid level of the original liquid tank after evaporation based on the waste liquid volume. Control the steam inlet valve to open to evaporate the waste liquid in the kettle evaporator; control the compressed air inlet valve to open to transport the solution in the original liquid tank to the kettle evaporator; control the cooling water valve to be in a closed state. During the evaporation process, adjust the opening of the steam inlet valve and the opening of the compressed air inlet valve to keep the liquid level of the kettle evaporator constant during the evaporation process. When the liquid level in the original liquid tank reaches the target liquid level, control the steam inlet valve to close to stop evaporating the waste liquid in the kettle evaporator; control the compressed air inlet valve to close to stop transporting the solution in the original liquid tank to the kettle evaporator; control the cooling water inlet valve to open to cool the kettle evaporator. When the temperature of the kettle evaporator is cooled to the set temperature, the cooling water inlet valve is closed. The automatic sampling device in the kettle evaporator is used for automatic sampling analysis to determine whether the concentration of the target substance in the kettle evaporator meets the requirements, that is, whether the target concentration is reached. If it is not reached, the cause is analyzed and the problem is solved, and the analysis result is used as the initial parameter to recalculate the target liquid level and perform the evaporation operation.

[0094] In the present embodiment, a waste liquid evaporation endpoint automatic determination device and a waste liquid evaporation control device are also provided, which are used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0095] This embodiment provides an automatic determination device for waste liquid evaporation endpoint, which is applied to an evaporation system. The evaporation system includes a raw liquid tank and a kettle evaporator. The waste liquid includes a target substance. The mass of the target substance is conserved before and after evaporation. Figure 4 As shown, the device comprises:

[0096] The parameter acquisition module 41 is used to acquire the waste liquid parameters of the evaporation system before evaporation and the waste liquid target parameters in the kettle evaporator after evaporation;

[0097] The target liquid level determination module 42 is used to determine the target liquid level in the original liquid tank after evaporation according to the mass of the target substance before evaporation calculated by the waste liquid parameter, the waste liquid target parameter, and the mass conservation of the target substance before and after evaporation;

[0098] The evaporation endpoint determination module 43 is used to determine the evaporation endpoint of the evaporation system based on the target liquid level.

[0099] In an optional embodiment, the waste liquid parameters include a first liquid level, a first density and a first concentration of the target substance in the original liquid tank before evaporation, a second liquid level, a second density and a second concentration of the target substance in the kettle evaporator, and the waste liquid target parameters include a target density and a target concentration of the target substance in the kettle evaporator after evaporation, the density and the concentration of the target substance in the original liquid tank remain unchanged before and after evaporation, and the kettle evaporator adopts a continuous evaporation method; the target liquid level determination module is specifically used to: perform volume-liquid level calibration on the original liquid tank and the kettle evaporator, determine a first function between the volume and liquid level of the waste liquid in the original liquid tank and a second function between the volume and liquid level of the waste liquid in the kettle evaporator; based on The first volume of the original liquid tank before evaporation and the second volume of the kettle evaporator are determined according to the first liquid level and the first function and the second liquid level and the second function respectively; the mass of the target substance before evaporation is determined according to the sum of the product of the first volume, the first density and the first concentration of the target substance and the product of the second volume, the second density and the second concentration of the target substance; the mass of the target substance in the kettle evaporator after evaporation is determined according to the product of the second volume, the target density and the target concentration of the target substance; the target liquid level in the original liquid tank after evaporation is determined according to the ratio of the difference between the mass of the target substance before evaporation and the mass of the target substance in the kettle evaporator after evaporation to the product of the first density and the first concentration of the target substance.

[0100] In an optional embodiment, the target liquid level in the original liquid tank after evaporation is calculated using the following formula:

[0101] h 12 =f1 -1 (V 12 )

[0102]

[0103] In the formula, h 12 Indicates the target liquid level, V 12 Indicates the second volume, h 11 Indicates the first liquid level, h 21 represents the second liquid level, f1 represents the first function between the volume of the waste liquid in the original liquid tank and the liquid level, f2 represents the second function between the volume of the waste liquid in the kettle evaporator and the liquid level, represents the inverse function of the first function f1, ρ 22 represents the target density, ρ 21 represents the second density, ρ 11 represents the first density, C 22 Indicates the target concentration of the target substance, C 21 Indicates the second concentration of the target substance, C 11 Indicates the first concentration of the target substance.

[0104] In an optional embodiment, the evaporation system also includes: a condensation tank, and the device also includes: a verification module specifically used to obtain the concentration of the target substance in the condensation tank before and after evaporation; determine whether the concentration of the target substance before evaporation is less than a threshold value; when the concentration of the target substance before evaporation is greater than or equal to the threshold value, process the condensation tank until the concentration of the target substance in the condensation tank is less than the threshold value; when the concentration of the target substance after evaporation is greater than or equal to the threshold value, verify whether the concentration of the target substance in the kettle evaporator reaches the target concentration.

[0105] In an optional embodiment, the device also includes: an adjustment module, which is specifically used to obtain the concentration of the target substance in the kettle evaporator after evaporation; determine whether the concentration of the target substance is equal to the target concentration of the target substance; when the concentration of the target substance is equal to the target concentration of the target substance, adjust the evaporation parameters of the kettle evaporator, and recalculate and determine the target liquid level in the original liquid tank after evaporation; repeat the above process until the concentration of the target substance in the kettle evaporator after evaporation is equal to the target concentration of the target substance.

[0106] This embodiment provides a waste liquid evaporation control device, which is applied to the waste liquid evaporation endpoint automatic determination method of the above embodiment, such as Figure 5 As shown, the device comprises:

[0107] The first control module 51 is used to control the steam inlet valve to open and evaporate the waste liquid in the kettle evaporator;

[0108] The second control module 52 is used to control the compressed air inlet valve to open, so as to transport the solution in the stock liquid tank to the kettle evaporator;

[0109] The third control module 53 is used to control the steam inlet valve to close when the liquid level in the original liquid tank reaches the target liquid level, so as to stop evaporating the waste liquid in the kettle evaporator;

[0110] The fourth control module 54 is used to control the compressed air inlet valve to close, and stop conveying the solution in the original liquid tank to the kettle evaporator;

[0111] The fifth control module 55 is used to control the cooling water inlet valve to open and perform cooling operation on the kettle evaporator.

[0112] In an optional embodiment, the device further comprises: an opening adjustment module, which is specifically used to adjust the opening of the steam inlet valve and the opening of the compressed air inlet valve so that the liquid level of the kettle evaporator is constant during the evaporation process.

[0113] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0114] The embodiment of the present invention also provides a computer device having the above Figure 4The waste liquid evaporation endpoint automatic determination device shown or Figure 5 The waste liquid evaporation control device shown.

[0115] See also Figure 6 , Figure 6 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 6 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 6 A processor 10 is taken as an example.

[0116] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0117] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0118] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created by the use of a computer device based on the presentation of a small program landing page, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0119] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0120] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0121] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0122] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0123] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for automatically determining the end point of waste liquid evaporation, characterized in that: Applied to an evaporation system, the evaporation system includes a raw liquid tank and a kettle evaporator, the waste liquid includes a target substance, and the mass of the target substance is conserved before and after evaporation. The method includes: Obtaining the waste liquid parameters of the evaporation system before evaporation and the waste liquid target parameters in the kettle evaporator after evaporation; Determine the target liquid level in the original liquid tank after evaporation according to the mass of the target substance before evaporation calculated from the waste liquid parameters, the waste liquid target parameters, and the mass conservation of the target substance before and after evaporation; An evaporation endpoint of the evaporation system is determined based on the target liquid level.

2. The method according to claim 1, characterized in that The waste liquid parameters include a first liquid level, a first density and a first concentration of the target substance in the original liquid tank before evaporation, a second liquid level, a second density and a second concentration of the target substance in the kettle evaporator, and the waste liquid target parameters include a target density and a target concentration of the target substance in the kettle evaporator after evaporation. The density and the concentration of the target substance in the original liquid tank remain unchanged before and after evaporation, and the kettle evaporator adopts a continuous evaporation method; Determining the target liquid level in the original liquid tank after evaporation according to the mass of the target substance before evaporation calculated from the waste liquid parameters, the target parameters of the waste liquid, and the mass conservation of the target substance before and after evaporation, including: Performing volume-liquid level calibration on the original liquid tank and the kettle evaporator to determine a first function between the volume and liquid level of the waste liquid in the original liquid tank and a second function between the volume and liquid level of the waste liquid in the kettle evaporator; Determine the first volume of the original liquid tank before evaporation and the second volume of the kettle evaporator according to the first liquid level and the first function and the second liquid level and the second function respectively; determining the mass of the target substance before evaporation based on the sum of the product of the first volume, the first density and the first concentration of the target substance and the product of the second volume, the second density and the second concentration of the target substance; determining the mass of the target substance in the kettle evaporator after evaporation based on the product of the second volume, the target density, and the target concentration of the target substance; The target liquid level in the raw liquid tank after evaporation is determined according to the ratio of the difference between the mass of the target substance before evaporation and the mass of the target substance in the kettle evaporator after evaporation to the product of the first density and the first concentration of the target substance.

3. The method according to claim 2, characterized in that The target liquid level in the original liquid tank after evaporation is calculated using the following formula: h 12 =f1 -1 (V 12 ) In the formula, h 12 Indicates the target liquid level, V 12 Indicates the second volume, h 11 Indicates the first liquid level, h 21 represents the second liquid level, f1 represents the first function between the volume and liquid level of the waste liquid in the original liquid tank, f2 represents the second function between the volume and liquid level of the waste liquid in the kettle evaporator, f1 -1 represents the inverse function of the first function f1, ρ 22 represents the target density, ρ 21 represents the second density, ρ 11 represents the first density, C 22 Indicates the target concentration of the target substance, C 21 Indicates the second concentration of the target substance, C 11 Indicates the first concentration of the target substance.

4. The method according to claim 1, characterized in that: The evaporation system further comprises: a condensation tank, and the method further comprises: Obtaining the concentration of the target substance in the condensate tank before and after evaporation; Determining whether the concentration of the target substance before evaporation is less than a threshold value; When the concentration of the target substance before evaporation is greater than or equal to a threshold value, treating the condensation tank until the concentration of the target substance in the condensation tank is less than the threshold value; When the concentration of the target substance after evaporation is greater than or equal to a threshold value, it is verified whether the concentration of the target substance in the kettle evaporator reaches a target concentration.

5. The method according to claim 2, characterized in that: The method further comprises: Obtaining the concentration of the target substance in the kettle evaporator after evaporation; Determining whether the concentration of the target substance is equal to the target concentration of the target substance; When the concentration of the target substance is equal to the target concentration of the target substance, adjusting the evaporation parameters of the kettle evaporator, and recalculating and determining the target liquid level in the original liquid tank after evaporation; The above process is repeated until the concentration of the target substance in the kettle evaporator after evaporation is equal to the target concentration of the target substance.

6. A method for controlling the evaporation of waste liquid, characterized in that: The method for automatically determining the end point of waste liquid evaporation according to any one of claims 1 to 5 comprises: Control the steam inlet valve to open and evaporate the waste liquid in the kettle evaporator; Control the compressed air inlet valve to open and transport the solution in the stock liquid tank to the kettle evaporator; When the liquid level in the original liquid tank reaches the target liquid level, the steam inlet valve is controlled to close, and the evaporation of the waste liquid in the kettle evaporator is stopped; Control the compressed air inlet valve to close and stop conveying the solution in the stock liquid tank to the kettle evaporator; Control the cooling water inlet valve to open and perform cooling operation on the kettle evaporator.

7. The method according to claim 6, characterized in that After controlling the compressed air inlet valve to open and transferring the solution in the stock liquid tank to the kettle evaporator, the method further comprises: Adjust the opening of the steam inlet valve and the compressed air inlet valve to ensure that the liquid level in the kettle evaporator is constant during the evaporation process.

8. A device for automatically determining the end point of waste liquid evaporation, characterized in that: Applied to an evaporation system, the evaporation system includes a raw liquid tank and a kettle evaporator, the waste liquid includes a target substance, and the mass of the target substance is conserved before and after evaporation. The device includes: A parameter acquisition module, used to acquire the waste liquid parameters of the evaporation system before evaporation and the waste liquid target parameters in the kettle evaporator after evaporation; A target liquid level determination module, used to determine the target liquid level in the original liquid tank after evaporation according to the mass of the target substance before evaporation calculated by the waste liquid parameter, the waste liquid target parameter, and the mass conservation of the target substance before and after evaporation; The evaporation endpoint determination module is used to determine the evaporation endpoint of the evaporation system based on the target liquid level.

9. A waste liquid evaporation control device, characterized in that: The method for automatically determining the end point of waste liquid evaporation according to any one of claims 1 to 5 comprises: The first control module is used to control the steam inlet valve to open and evaporate the waste liquid in the kettle evaporator; The second control module is used to control the compressed air inlet valve to open, so as to transport the solution in the stock liquid tank to the kettle evaporator; The third control module is used to control the steam inlet valve to close when the liquid level in the original liquid tank reaches the target liquid level, so as to stop evaporating the waste liquid in the kettle evaporator; The fourth control module is used to control the compressed air inlet valve to close and stop conveying the solution in the original liquid tank to the kettle evaporator; The fifth control module is used to control the cooling water inlet valve to open and perform cooling operation on the kettle evaporator.

10. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method for automatically determining the end point of waste liquid evaporation according to any one of claims 1 to 5 or the method for controlling waste liquid evaporation according to claim 6 or 7 by executing the computer instructions.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method for automatically determining the end point of waste liquid evaporation according to any one of claims 1 to 5 or the method for controlling waste liquid evaporation according to claim 6 or 7.

12. A computer program product, characterized in that The method comprises computer instructions, wherein the computer instructions are used to enable a computer to execute the method for automatically determining the end point of waste liquid evaporation according to any one of claims 1 to 5 or the method for controlling waste liquid evaporation according to claim 6 or 7.

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