Technological parameter experimental device for harmless treatment of chemical waste salt

Abstract

The utility model discloses a process parameter experiment and selection device for harmless treatment of chemical waste salt, which comprises a reaction furnace, a movable reaction device, a gas inlet pipe, a gas cylinder, a gas outlet pipe, a cold trap and a gas analyzer, the movable reaction device is mounted at an opening in the lower end of the reaction furnace through a sealing flange, and comprises a sample bearing part for feeding a sample into the reaction furnace; a gas inlet pipe is arranged in the movable reaction device, and the gas cylinder is connected with a gas inlet of the gas inlet pipe and used for inputting reaction atmosphere into the reaction furnace; gas generated by the reaction of the sample in the reaction furnace is output through an upper end gas outlet pipe; the cold trap is used for cooling and filtering gas generated by reaction; and the gas analyzer is connected with the cold trap and is used for performing component analysis on the gas filtered by the cold trap. According to the utility model, technological parameters of harmless treatment can be quickly determined by using a small amount of waste salt.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a device for experimenting with and selecting process parameters for the harmless treatment of chemical waste salt. Background Technology

[0002] Chemical waste salt is mainly generated in industrial production processes such as pesticide intermediates, drug synthesis, and dyeing, as well as in solid-liquid separation, solution concentration and crystallization, and wastewater treatment. It is characterized by its diverse sources, numerous types, complex composition, high treatment costs, and significant environmental hazards. Improper treatment can directly lead to surface water and groundwater pollution, soil pollution, and damage to the ecological environment. With the rapid development of my country's chemical and related industries, the output of chemical waste salt has increased year by year. Effective disposal of waste salt has become a critical issue that urgently needs to be addressed within the industry, seriously hindering the survival and sustainable development of waste salt-producing enterprises.

[0003] Currently, common methods for treating chemical waste salts include rotary kiln co-processing, pyrolysis, high-temperature melting, and microwave treatment. However, these methods lack standardized process parameters, failing to meet the actual treatment needs of the diverse types and complex compositions of chemical waste salts. Utility Model Content

[0004] The purpose of this invention is to provide a process parameter experiment and selection device for the harmless treatment of chemical waste salt, so as to at least partially solve the above-mentioned problems of the prior art.

[0005] To achieve the above objectives, one embodiment of this utility model provides a process parameter experimental device for the harmless treatment of chemical waste salt, including a reactor, a movable reaction device, an inlet pipe, a gas cylinder, an outlet pipe, a cold trap, and a gas analyzer.

[0006] The reactor has openings at the top and bottom, and the furnace wall is made of corundum tubes. Heating rods are installed inside the corundum tubes and connected to an external temperature controller. Insulation material is installed outside the corundum tubes.

[0007] The movable reaction device is detachably installed at the lower opening of the reactor via a first sealing flange to seal the lower opening of the reactor. The movable reaction device includes a sample carrying component for carrying the sample of chemical waste salt to be treated and sending the sample into the reactor. The movable reaction device has an internal air inlet pipe, with the air outlet of the air inlet pipe located inside the reactor and the air inlet of the air inlet pipe located outside the reactor.

[0008] The gas cylinder is connected to the inlet of the gas inlet pipe and is used to input the reaction atmosphere into the reactor.

[0009] The gas outlet pipe is installed at the upper opening of the reactor through a second sealing flange to seal the upper opening of the reactor. The gas generated by the reaction of the sample in the reactor is output through the gas outlet pipe.

[0010] The cold trap is connected to the gas outlet pipe. The gas generated by the reaction in the reactor reaches the cold trap through the gas outlet pipe. The cold trap is used to cool and filter the gas generated by the reaction.

[0011] The gas analyzer is connected to the cold trap and is used to perform component analysis on the gas filtered by the cold trap.

[0012] In a preferred embodiment, the experimental apparatus further includes a cooling system for cooling the first sealing flange and the second sealing flange.

[0013] In a preferred embodiment, the experimental apparatus further includes a control system for controlling the type of gas introduced into the gas cylinder according to the set values ​​of the process parameters, and adjusting the reaction temperature, heating mode, and reaction time in the reactor through the external temperature controller.

[0014] Another aspect of this utility model provides a process parameter selection device for the harmless treatment of chemical waste salt, including the experimental device described in the above aspects and any of its embodiments, and:

[0015] The detection unit is used to detect the sample of the chemical waste salt to be treated and determine the inorganic components of the chemical waste salt to be treated;

[0016] Data storage unit, used to pre-store the correspondence between the inorganic components and their melting points;

[0017] The experimental apparatus is electrically connected to the detection unit and the data storage unit, and is used for:

[0018] The inorganic components of the chemical waste salt to be treated are obtained from the detection unit, and the melting point of the inorganic components is determined by querying the data storage unit.

[0019] Multiple initial values ​​of process parameters in pyrolysis mode and / or melting mode are determined according to a preset strategy; the process parameters include heating mode, reaction temperature, reaction time, and reaction atmosphere;

[0020] Multiple sets of waste salt harmless treatment experiments were performed on the sample using the aforementioned multiple sets of initial values;

[0021] The products from the multiple waste salt harmless treatment experiments were collected, and the total organic carbon content of the solid products and the composition of the gaseous products were tested under different initial conditions.

[0022] The disposal consumption η under the harmless treatment experiment of waste salt in each group is calculated based on the total organic carbon content of the solid product and the composition of the gaseous product, as follows:

[0023]

[0024] Where i is the experimental group number, n is the total number of experimental groups, and H i TOC is the theoretical value of the heat absorbed by the inorganic component as it rises from room temperature to the reaction temperature. i The total organic carbon (TOC) content in the waste salt after the i-th experimental group treatment is given by the TOC value. s The target value for the total organic carbon content in the treated waste salt; E i M represents the heat dissipation value of the furnace body from the start to the end of the i-th group of experiments; j Let m be the emission limit for the j-th gaseous pollutant; ji Let be the experimental value of the j-th gaseous pollutant in the gaseous products obtained from the i-th experiment; N is the number of types of gaseous products; A, B, C, and D are weighting coefficients, and A+B+C+D=1;

[0025] Choose the value with the smallest η and TOC. i ≤TOC s The process parameters corresponding to a set of experiments were used as the final process parameters for the harmless treatment of chemical waste salt.

[0026] In a preferred embodiment, the heating mode includes a rapid heating mode and a slow heating mode.

[0027] In a preferred embodiment, the selection device further includes: a mode control unit, electrically connected to the experimental apparatus, for transmitting a mode selection signal to the experimental apparatus;

[0028] The experimental setup is used to receive the mode selection signal sent by the mode control unit and determine the reaction mode:

[0029] If the reaction mode is the pyrolysis mode or the melting mode, the highest value of the reaction temperature in the pyrolysis mode or the lowest value of the reaction temperature in the melting mode is determined according to the melting point of the inorganic component. The highest temperature in the pyrolysis mode is decreased sequentially downwards, or the lowest temperature in the melting mode is increased sequentially upwards, to obtain multiple temperature values.

[0030] If it cannot be determined whether the reaction mode is the pyrolysis mode or the melting mode, then multiple temperature values ​​for the pyrolysis mode and multiple temperature values ​​for the melting mode are output respectively, or the highest temperature value of the pyrolysis mode and the lowest temperature value of the melting mode are used as the reaction temperature values ​​for two sets of comparative experiments.

[0031] Compared with the prior art, the present invention has at least the following advantages:

[0032] By adopting the solution provided in this utility model embodiment, it is possible to quickly determine the process parameters for harmless treatment using a small amount of waste salt. It is applicable to determining the treatment process parameters for waste salt raw materials with a wide variety of types and complex and variable compositions. At the same time, if there is only a small amount of chemical waste salt, it can be directly treated by setting the initial values ​​of the process parameters. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a process parameter experimental device for the harmless treatment of chemical waste salt, provided as an embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of a process parameter selection device for the harmless treatment of chemical waste salt, provided as an embodiment of the present invention.

[0035] Figure 3 A flowchart illustrating the method for selecting process parameters using the apparatus provided in this embodiment of the present invention. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate to understand the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a product or device comprising a series of units is not necessarily limited to those explicitly listed, but may include other units not explicitly listed or inherent to such product or device.

[0038] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0041] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] This utility model embodiment provides a process parameter experimental device for the harmless treatment of chemical waste salt, such as... Figure 1 As shown, it includes a reactor 31, a movable reaction device 32, an inlet pipe 33, a gas cylinder 34, an outlet pipe 35, a cold trap 36, and a gas analyzer 37, wherein...

[0044] The reactor 31 has openings at the top and bottom, and the furnace wall is made of corundum tubes 311. Heating rods 312 are installed inside the corundum tubes 311 and connected to an external temperature controller 313. Insulation material 314 is installed outside the corundum tubes 311.

[0045] The temperature inside the reactor is controlled by an external temperature controller 313, which controls the heating rod 312. A metal shell can be installed outside the insulation material 314, forming a reactor 31 with corundum tubes as the furnace wall, and the outside of the reactor 31 is filled with insulation material.

[0046] The movable reaction device 32 is detachably installed at the lower opening of the reactor via a first sealing flange 321, thereby sealing the lower opening of the reactor. The movable reaction device 32 includes a sample-carrying component 322 for carrying the sample of chemical waste salt to be treated and feeding the sample into the reactor 31. The movable reaction device 32 has a built-in air inlet pipe 33, with the outlet of the air inlet pipe 33 located inside the reactor 31 and the inlet of the air inlet pipe 33 located outside the reactor.

[0047] In a preferred embodiment, the movable reaction device 32 may further include a cooling system 323 for cooling the sealing flange to ensure that the flange temperature does not become too high and cause burns.

[0048] Gas cylinder 34 is connected to the inlet of the gas inlet pipe and is used to input the reaction atmosphere into the reactor 31. The gas cylinder 34 shown in the figure is only an example; in practice, multiple gas cylinders may be included, each used to input different gases or gas mixtures into the reactor as needed.

[0049] The gas outlet pipe 35 is installed at the upper opening of the reactor 31 through the second sealing flange 351 to seal the upper opening of the reactor 31. The gas generated by the reaction of the sample in the reactor 31 is output through the gas outlet pipe 35.

[0050] The cold trap 36 is connected to the gas outlet pipe. The gas generated in the reaction in the reactor 31 reaches the cold trap 36 through the gas outlet pipe, and the cold trap 36 filters the gas generated in the reaction. In one embodiment, the cold trap 36 may include a water cooling system or other condensation system to control the gas condensation effect of the cold trap 36, so that the gas components to be analyzed are not liquefied.

[0051] Gas analyzer 37 is connected to cold trap 36 and is used to perform component analysis on the gas filtered by cold trap 36. This gas analyzer 37 can be an existing product, and this document does not impose any restrictions on it.

[0052] In one embodiment, the experimental apparatus may further include a control system for controlling the type of gas introduced into the gas cylinder according to the set values ​​of the process parameters, and adjusting the reaction temperature, heating mode, and reaction time in the reactor through an external temperature controller, thereby achieving flexible control of the experimental reaction parameters.

[0053] By using the experimental device for process parameters of harmless treatment of chemical waste salt provided in this embodiment of the invention, it is possible to quickly determine the process parameters for harmless treatment using a small amount of waste salt. It is applicable to determining the treatment process parameters for waste salt raw materials with a wide variety of types and complex and variable compositions. At the same time, if there is only a small amount of chemical waste salt, it can be directly treated by setting the initial values ​​of the process parameters.

[0054] Example 2

[0055] This utility model provides a device for selecting process parameters for the harmless treatment of chemical waste salt, such as... Figure 2 As shown, the device includes:

[0056] The detection unit 100 is used to detect the sample of the chemical waste salt to be treated and to determine the inorganic components of the chemical waste salt to be treated.

[0057] The specific implementation of this detection unit can be flexibly configured, and existing instruments can be used, as long as they can detect the inorganic components of chemical waste salt. Existing physical spectroscopy or chemical reagent detection methods can be employed, as long as the main inorganic components of the waste salt can be detected. This invention does not limit the specific detection method.

[0058] The basic components of waste salt include inorganic components and other components. In this invention, it is only necessary to determine the inorganic components of waste salt. Common inorganic components of waste salt include at least one of sodium ions, potassium ions, chloride ions, and sulfate ions.

[0059] The data storage unit 200 is used to pre-store the correspondence between inorganic components and their melting points. Different inorganic components have different melting points, and the possible correspondences between inorganic components and their melting points can be pre-stored in the storage unit. This data storage unit 200 can be an existing memory, and the specific device can be flexibly selected.

[0060] Experimental unit 300, i.e., the experimental apparatus provided in Embodiment 1 above, is electrically connected to detection unit 100 and data storage unit 200, and is used for:

[0061] The inorganic components of the chemical waste salt to be treated are obtained from the detection unit 100, and the melting point of the inorganic components is determined by querying the data storage unit 200.

[0062] Determine multiple initial values ​​for process parameters in pyrolysis and / or melting modes; process parameters include heating mode, reaction temperature, reaction time, and reaction atmosphere;

[0063] Multiple sets of initial values ​​were used to perform multiple sets of waste salt harmless treatment experiments on the samples;

[0064] Products from multiple waste salt harmless treatment experiments were collected, and the total organic carbon content of solid products and the composition of gaseous products were tested under different initial conditions.

[0065] Based on the total organic carbon content of the solid products and the composition of the gaseous products, the disposal consumption η under the harmless treatment experiments of each group of waste salts is calculated, using the following formula:

[0066]

[0067] Where i is the experimental group number, n is the total number of experimental groups, and Hi TOC is the theoretical value of the heat absorbed by the inorganic component as it rises from room temperature to the reaction temperature. i The total organic carbon (TOC) content in the waste salt after the i-th experimental group treatment is given by the TOC value. s The target value for the total organic carbon content in the treated waste salt; E i M represents the heat dissipation value of the furnace body from the start to the end of the i-th group of experiments; j Let m be the emission limit for the j-th gaseous pollutant; ji Let be the experimental value of the j-th gaseous pollutant in the gaseous products obtained from the i-th experiment; N is the number of types of gaseous products; A, B, C, and D are weighting coefficients, and A+B+C+D=1;

[0068] Choose the value with the smallest η and TOC. i ≤TOC s The process parameters corresponding to a set of experiments were used as the final process parameters for the harmless treatment of chemical waste salt.

[0069] In one embodiment, determining the melting point of the inorganic component includes: determining the highest melting point of the inorganic component; that is, when the inorganic component comprises multiple components, determining the highest or lowest melting point temperature corresponding to each component as the melting point of the inorganic component. In other embodiments, when the inorganic component comprises multiple components, the average value or other value of the melting point temperatures of the multiple components may also be determined as the melting point of the inorganic component. In one embodiment, melting points corresponding to a pyrolysis mode and a melting mode may be set separately. For the pyrolysis mode, the lowest melting point temperature corresponding to each component is determined as the melting point of the inorganic component; for the melting mode, the highest melting point temperature corresponding to each component is determined as the melting point of the inorganic component.

[0070] One approach is to pre-store the correspondence between each inorganic component and its melting point in a database. Once the inorganic components of the waste salt are determined, the melting point of each component can be directly retrieved from the database, thus determining the melting point of the inorganic components.

[0071] In this embodiment of the invention, a sample acquisition unit may also be included, used to process the chemical waste salt to be treated to obtain a sample. For example, experiments can be conducted to make the particle size of the chemical waste salt to be treated suitable through crushing, grinding, or other methods, and this sample can then be used as the final sample.

[0072] In this embodiment of the utility model, a control unit may also be included, which is used to run a built-in program to send control commands to the detection unit 100, the data storage unit 200 and the experimental unit 300, and control the detection unit 100, the data storage unit 200 and the experimental unit 300 to perform their respective operations.

[0073] In this embodiment of the invention, a mode control unit may also be included, which is electrically connected to the experimental device and is used to transmit a mode selection signal to the experimental device.

[0074] The experimental setup is used to receive the mode selection signal sent by the mode control unit and determine the reaction mode:

[0075] If the reaction mode is the pyrolysis mode or the melting mode, the highest value of the reaction temperature in the pyrolysis mode or the lowest value of the reaction temperature in the melting mode is determined according to the melting point of the inorganic component. The highest temperature in the pyrolysis mode is decreased sequentially downwards, or the lowest temperature in the melting mode is increased sequentially upwards, to obtain multiple temperature values.

[0076] If it cannot be determined whether the reaction mode is the pyrolysis mode or the melting mode, then multiple temperature values ​​for the pyrolysis mode and multiple temperature values ​​for the melting mode are output respectively, or the highest temperature value of the pyrolysis mode and the lowest temperature value of the melting mode are used as the reaction temperature values ​​for two sets of comparative experiments.

[0077] In one implementation, the experimental setup for determining multiple sets of initial values ​​for process parameters in pyrolysis and / or melting modes may include:

[0078] Receive the mode selection signal, determine the operating mode as pyrolysis mode and / or melting mode based on the mode selected by the mode selection signal, and determine multiple initial values ​​of process parameters under the selected mode; or

[0079] Determine the initial values ​​of the process parameters for pyrolysis mode and melting mode respectively.

[0080] For example, the operating mode to be used can be manually selected, and the parameter determining device receives the selected operating mode as pyrolysis mode and / or melting mode. That is, one operating mode or two operating modes can be selected. When one operating mode is selected, the parameter determining device determines multiple sets of initial values ​​for the process parameters under the selected operating mode. When two operating modes are selected, the parameter determining device determines the initial values ​​of the process parameters under the pyrolysis mode and the melting mode respectively.

[0081] If no mode selection signal is received, the experimental setup will automatically determine multiple initial values ​​of the process parameters in pyrolysis mode and melting mode.

[0082] If no mode selection signal is received, the experimental setup can also determine the process parameters for pyrolysis and melting modes separately, obtaining two sets of initial values. These initial values ​​can then be compared to determine whether to select pyrolysis or melting mode. Alternatively, multiple sets of process parameters and initial values ​​can be obtained for both pyrolysis and melting modes, and the selection of either mode can be determined by comparing these initial values.

[0083] The specific number of initial values ​​can be flexibly adjusted according to actual needs. For example, it can be set to determine three initial values, or it can be set to determine five or more initial values.

[0084] The heating modes include a rapid heating mode and a slow heating mode. The rapid heating mode involves directly placing the room temperature sample into the reaction environment at the experimentally set reaction temperature, while the slow heating mode involves first placing the sample into the reaction environment and then heating until the reaction temperature is reached.

[0085] In the pyrolysis mode, the highest reaction temperature is lower than the melting point of the inorganic component (100℃), while in the melting mode, the lowest reaction temperature is higher than the melting point of the inorganic component (100℃). This difference of 100℃ is the preferred reaction temperature and can be flexibly adjusted according to actual needs, such as setting the range to 50℃~150℃, 20℃~200℃, or other numerical ranges.

[0086] The methods for determining the reaction time include:

[0087] For the pyrolysis mode, the shortest reaction time is 20 min and the longest is 300 min, with the shortest reaction time interval between different experiments being 5 min;

[0088] For the melt mode, the shortest reaction time is 2 minutes and the longest is 30 minutes, with the shortest reaction time interval between different experiments being 2 minutes.

[0089] The reaction time values ​​for the above-mentioned pyrolysis and melting modes are preferred values, but other times can also be set. For example, for the pyrolysis mode, the shortest reaction time is 5-20 min, and the longest is 300-600 min, with the shortest reaction time interval between different experiments being 3-5 min; for the melting mode, the shortest reaction time is 1-2 min, and the longest is 30-60 min, with the shortest reaction time interval between different experiments being 1-2 min.

[0090] The reaction atmosphere includes air, oxygen, nitrogen, carbon dioxide, or water vapor. The reaction atmosphere can be flexibly selected according to actual needs. For example, based on the principle of economy, the reaction atmosphere can be selected according to the following priority: air > water vapor > carbon dioxide > oxygen > nitrogen. Alternatively, the priority can be determined based on the reaction effect or other considerations; this invention does not limit the selection in this regard.

[0091] When there are multiple parameters, an orthogonal array can be used to filter multiple sets of initial values, and the optimal combination of initial values ​​can be determined through experiments on multiple sets of initial values.

[0092] In one implementation, if the working mode is determined to be either pyrolysis mode or melting mode, the experimental apparatus performs multiple sets of experiments based on multiple sets of initial values ​​for the determined working mode, obtains multiple sets of experimental data for each mode, calculates the treatment consumption corresponding to each set of initial values ​​for each mode, and then determines a set of optimal initial values ​​for working parameters for the working mode.

[0093] If it is uncertain whether the working mode is pyrolysis mode or melting mode, then calculate the experimental data in pyrolysis mode and melting mode respectively, and compare them to determine whether to choose pyrolysis mode or melting mode.

[0094] In a preferred embodiment, it is not necessary to predetermine whether the working mode is pyrolysis mode or melting mode. Instead, experimental data in pyrolysis mode and melting mode are calculated separately, and the experimental data are compared to determine whether to select pyrolysis mode or melting mode. Then, experimental data corresponding to multiple sets of initial parameter values ​​under the determined working mode are calculated separately, and a better set of initial working parameter values ​​under the working mode is determined.

[0095] By using the experimental device for process parameters of harmless treatment of chemical waste salt provided in this embodiment of the invention, it is possible to quickly determine the process parameters for harmless treatment using a small amount of waste salt. It is applicable to determining the treatment process parameters for waste salt raw materials with a wide variety of types and complex and variable compositions. At the same time, if there is only a small amount of chemical waste salt, it can be directly treated by setting the initial values ​​of the process parameters.

[0096] Example 3

[0097] To facilitate understanding of the present invention, this embodiment provides a method for selecting process parameters using the apparatus of Embodiment 2 described above, such as... Figure 3 As shown, the method for selecting process parameters for the harmless treatment of chemical waste salt includes the following steps:

[0098] Step 10: Analyze the sample of the chemical waste salt to be treated to obtain the inorganic components of the chemical waste salt.

[0099] The basic components of waste salt include inorganic components and other components. In this invention, it is only necessary to determine the inorganic components of waste salt. Common inorganic components of waste salt include at least one of sodium ions, potassium ions, chloride ions, and sulfate ions.

[0100] Step 20: Determine the melting point of the inorganic component and determine multiple initial values ​​for process parameters in pyrolysis mode and / or melting mode; process parameters include heating mode, reaction temperature, reaction time, and reaction atmosphere.

[0101] Determining the melting point of the inorganic component includes: determining the highest melting point of the inorganic component; that is, when the inorganic component comprises multiple components, determining the highest or lowest melting point temperature corresponding to each component as the melting point of the inorganic component. In other embodiments, when the inorganic component comprises multiple components, the average value or other value of the melting point temperatures of the multiple components can also be determined as the melting point of the inorganic component. In one embodiment, melting points corresponding to pyrolysis mode and melting mode can be set separately. For pyrolysis mode, the lowest melting point temperature corresponding to each component is determined as the melting point of the inorganic component; for melting mode, the highest melting point temperature corresponding to each component is determined as the melting point of the inorganic component.

[0102] In this way, a database can be set up to pre-store the correspondence between each inorganic component and its melting point. After the inorganic components of the waste salt are determined in step 10, the melting point of each component can be directly obtained from the database, thereby determining the melting point of the inorganic components.

[0103] Determining multiple sets of initial values ​​for process parameters in pyrolysis and / or melting modes may include:

[0104] Receive the mode selection signal, determine the operating mode as pyrolysis mode and / or melting mode based on the mode selected by the mode selection signal, and determine multiple initial values ​​of process parameters under the selected mode; or

[0105] Determine the initial values ​​of the process parameters for pyrolysis mode and melting mode respectively.

[0106] If no mode selection signal is received, or if there is no mode selection step, the parameter determination device will automatically determine multiple initial values ​​of the process parameters in the pyrolysis mode and the melting mode.

[0107] The specific number of initial values ​​can be flexibly adjusted according to actual needs. For example, it can be set to determine three initial values, or it can be set to determine five or more initial values.

[0108] The heating modes include a rapid heating mode and a slow heating mode. The rapid heating mode involves directly placing the room temperature sample into the reaction environment at the experimentally set reaction temperature, while the slow heating mode involves first placing the sample into the reaction environment and then heating until the reaction temperature is reached.

[0109] In the pyrolysis mode, the highest reaction temperature is lower than the melting point of the inorganic component (100℃), while in the melting mode, the lowest reaction temperature is higher than the melting point of the inorganic component (100℃). This difference of 100℃ is the preferred reaction temperature and can be flexibly adjusted according to actual needs, such as setting the range to 50℃~150℃, 20℃~200℃, or other numerical ranges.

[0110] The methods for determining the reaction time include:

[0111] For the pyrolysis mode, the shortest reaction time is 20 min and the longest is 300 min, with the shortest reaction time interval between different experiments being 5 min;

[0112] For the melt mode, the shortest reaction time is 2 minutes and the longest is 30 minutes, with the shortest reaction time interval between different experiments being 2 minutes.

[0113] The reaction atmosphere includes air, oxygen, nitrogen, carbon dioxide, or water vapor. The reaction atmosphere can be flexibly selected according to actual needs. For example, based on the principle of economy, the reaction atmosphere can be selected according to the following priority: air > water vapor > carbon dioxide > oxygen > nitrogen. Alternatively, the priority can be determined based on the reaction effect or other considerations; this invention does not limit the selection in this regard.

[0114] When there are multiple parameters, an orthogonal array can be used to filter multiple sets of initial values, and the optimal combination of initial values ​​can be determined through experiments on multiple sets of initial values.

[0115] Step 30: Perform multiple sets of waste salt harmless treatment experiments on the samples using multiple sets of initial values.

[0116] Step 40: Collect the products from multiple sets of waste salt harmless treatment experiments, and test the total organic carbon content of the solid products and the composition of the gaseous products under different initial conditions.

[0117] Step 50: Based on the total organic carbon content of the solid products and the composition of the gaseous products, calculate the disposal consumption η under the harmless treatment experiment of each group of waste salts, using the following formula:

[0118]

[0119] Where i is the experimental group number, n is the total number of experimental groups, and H i TOC is the theoretical value of the heat absorbed by the inorganic component as it rises from room temperature to the reaction temperature.i The total organic carbon (TOC) content in the waste salt after the i-th experimental group treatment is given by the TOC value. s The target value for the total organic carbon content in the treated waste salt; E i M represents the heat dissipation value of the furnace body from the start to the end of the i-th group of experiments; j Let m be the emission limit for the j-th gaseous pollutant; ji Let be the experimental value of the j-th gaseous pollutant in the gaseous products obtained from the i-th experiment; N is the number of types of gaseous products; A, B, C and D are weighting coefficients, and A+B+C+D=1.

[0120] Among them, TOC i E i m ji The value can be obtained through measurement, TOC s M j The values ​​can be determined in advance by looking up a standard or according to actual needs. The values ​​of N, A, B, C, and D can be default values ​​and can be flexibly adjusted according to actual needs.

[0121] Step 60, select the value with the smallest η and TOC i ≤TOC s The process parameters corresponding to a set of experiments were used as the final process parameters for the harmless treatment of chemical waste salt.

[0122] In specific calculations, if the working mode is determined to be either pyrolysis mode or melting mode, multiple sets of experiments are conducted based on multiple sets of initial values ​​for the determined working mode to obtain multiple sets of experimental data for each mode. The treatment consumption corresponding to each set of initial values ​​for each mode is calculated, and then the optimal set of initial values ​​for working parameters under the working mode is determined.

[0123] If it is uncertain whether the working mode is pyrolysis mode or melting mode, then calculate the experimental data in pyrolysis mode and melting mode respectively, and compare them to determine whether to choose pyrolysis mode or melting mode.

[0124] In a preferred embodiment, it is not necessary to predetermine whether the working mode is pyrolysis mode or melting mode. Instead, experimental data in pyrolysis mode and melting mode are calculated separately, and the experimental data are compared to determine whether to select pyrolysis mode or melting mode. Then, experimental data corresponding to multiple sets of initial parameter values ​​under the determined working mode are calculated separately, and a better set of initial working parameter values ​​under the working mode is determined.

[0125] By adopting the process parameter selection method for harmless treatment of chemical waste salt provided in this utility model embodiment, it is possible to quickly determine the process parameters for harmless treatment using a small amount of waste salt. It is applicable to determining the disposal process parameters for waste salt raw materials with a wide variety of types and complex and variable compositions. At the same time, if there is only a small amount of chemical waste salt, it can be directly treated by setting the initial values ​​of the process parameters.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A process parameter experimental device for the innocuity treatment of chemical waste salt, characterized in that, It includes a reactor, a portable reaction device, an inlet pipe, gas cylinders, an outlet pipe, a cold trap, and a gas analyzer. The reactor has openings at the top and bottom, and the furnace wall is made of corundum tubes. Heating rods are installed inside the corundum tubes and connected to an external temperature controller. Insulation material is installed outside the corundum tubes. The movable reaction device is detachably installed at the lower opening of the reactor via a first sealing flange to seal the lower opening of the reactor. The movable reaction device includes a sample carrying component for carrying the sample of chemical waste salt to be treated and sending the sample into the reactor. The movable reaction device has an internal air inlet pipe, with the air outlet of the air inlet pipe located inside the reactor and the air inlet of the air inlet pipe located outside the reactor. The gas cylinder is connected to the inlet of the gas inlet pipe and is used to input the reaction atmosphere into the reactor. The gas outlet pipe is installed at the upper opening of the reactor through a second sealing flange to seal the upper opening of the reactor. The gas generated by the reaction of the sample in the reactor is output through the gas outlet pipe. The cold trap is connected to the gas outlet pipe. The gas generated by the reaction in the reactor reaches the cold trap through the gas outlet pipe. The cold trap is used to cool and filter the gas generated by the reaction. The gas analyzer is connected to the cold trap and is used to perform component analysis on the gas filtered by the cold trap.

2. The process parameter experiment apparatus for the innocuity treatment of chemical waste salt according to claim 1, characterized in that, It also includes a cooling system for cooling the first sealing flange and the second sealing flange.

3. The process parameter experiment apparatus for the innocuity treatment of chemical waste salt according to claim 1, characterized in that, It also includes a control system for controlling the type of gas introduced into the gas cylinder according to the set values ​​of the process parameters, and adjusting the reaction temperature, heating mode, and reaction time in the reactor through the external temperature controller.

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