Chemical compatibility test equipment and test method

Abstract

The invention belongs to the field of chemical use and storage management risk assessment, and particularly discloses chemical compatibility test equipment and a test method. The test equipment comprises a controller, a constant-temperature closed reaction box and four mutually independent test bins arranged in the constant-temperature closed reaction box, wherein the four test bins are respectively a reaction bin, a standard bin, a first test bin and a second test bin. According to the chemical compatibility test equipment provided by the invention, on the basis of various calorimetric principles, chemical compatibility evaluation under various environmental conditions can be realized, and the compatibility of chemicals can be quantitatively evaluated through experimental parameters such as initial heat release temperature, heat production power, a heat flow curve, pressure rise and the like; and the situation of chemicals in real equipment can be simulated, the compatibility of the chemicals in the presence of heat loss under specific temperature and pressure conditions can be evaluated, and the method has a wide application prospect.

Description

Technical Field

[0001] The invention belongs to the field of risk assessment of chemical use and storage management, and in particular relates to a chemical compatibility testing device and a testing method. Background Art

[0002] During the production, use, transportation and storage of chemicals, mixing of chemicals may occur due to human factors, environmental factors or other factors. The mixing of compatible chemicals is safe, but the accidental mixing of incompatible chemicals may cause heat release, production of toxic gases or explosion, resulting in serious accidental consequences.

[0003] In 2019, an operator at a factory in the United States mixed XL10 methylsiloxane / dimethylsiloxane copolymer with a 10% potassium hydroxide solution, which produced hydrogen and caused an explosion, killing four people. In September 2020, an employee of a sewage treatment plant in Gansu violated regulations and quickly added hydrochloric acid to wastewater containing a large amount of sulfide, causing a large amount of hydrogen sulfide gas to overflow rapidly, killing three people. In order to avoid such accidents from happening again, it is very necessary to clarify the compatibility of chemicals.

[0004] Existing chemical compatibility analysis methods are based on chemical composition and classification (such as acid, alkali, etc.), and are not suitable for mixtures with unknown or complex components. When using relevant test methods to determine the compatibility of chemicals, most of them use simple equipment to mix materials and observe reactions or heat generation. The tests are not rigorous and highly dangerous. It is impossible to test the compatibility of chemicals under different environmental conditions, evaluate the reaction consequences of incompatible chemicals, and quantitatively evaluate the heat and gas production of reactions.

[0005] Based on the above problems, the present invention designs a chemical compatibility testing device, which realizes the chemical compatibility evaluation under various environmental conditions based on various calorimetric principles, and can quantitatively evaluate the chemical incompatibility through experimental parameters such as the initial heat release temperature, heat generation power, heat flow curve, and pressure rise. It can also simulate the scenario of chemicals in real equipment and evaluate the compatibility of chemicals when heat loss exists under specific temperature and pressure conditions. Summary of the invention

[0006] One object of the present invention is to provide a chemical compatibility testing device, which effectively solves the problem that the existing simple testing equipment is not rigorous and has high risk.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A chemical compatibility testing device comprises a controller, a constant temperature sealed reaction box and four mutually independent test chambers arranged in the constant temperature sealed reaction box, wherein the four test chambers are a reaction chamber, a standard chamber, a first test chamber and a second test chamber;

[0009] The test chamber comprises a test cup and a test cup cover, the top end of the test cup cover is telescopically connected to the inner top wall of the test chamber, the cup wall of the test cup and the test cup cover both have a heat preservation function, heaters are evenly arranged on the inner side wall of the test cup and the inner wall of the test cup cover, the inner side wall of the test cup is also surrounded by a cooling jacket for realizing a heat transfer function, a heat-equalizing interlayer is provided between the cooling jacket and the heater on the test cup, a compensation heater is embedded in the bottom wall of the test cup, a pressure sensor is provided on the inner side of the upper part of the test cup, a pressure relief device is provided on the upper part of the test cup, and a first temperature sensor is provided at the bottom of the test cup;

[0010] The heater, cooling jacket, compensation heater, pressure sensor, pressure relief device and first temperature sensor are all connected to the controller;

[0011] The test cup cover is provided with a first liquid feeder, a second liquid feeder, a solid feeder, a retractable gas feeder and a detachable stirring device, the inner wall of the test cup cover is provided with a second temperature sensor, the first liquid feeder passes through the test cup cover and the test chamber and is connected to the first sample bottle, the second liquid feeder passes through the test cup cover and the test chamber and is connected to the second sample bottle, and the gas feeder passes through the test cup cover and the test chamber and is connected to the gas outlet of the buffer assembly;

[0012] The first liquid feeder, the second liquid feeder, the solid feeder, the gas feeder, the stirring device and the second temperature sensor are all connected to the controller;

[0013] The buffer assembly has two air inlets, one of which is connected to the sample gas cylinder, and the other is connected to the outlet of the wet gas mixing module. The wet gas mixing module has two inlets, which are respectively connected to the dry gas cylinder and the wet gas generator;

[0014] The buffer component and the moisture mixing module are both connected to the controller;

[0015] A differential thermal amplifier is connected between the first temperature sensor of the reaction chamber and the first temperature sensor of the standard chamber, and a power compensation unit is connected between the compensation heater of the reaction chamber and the compensation heater of the standard chamber. The differential thermal amplifier and the power compensation unit are communicatively connected. When the controller controls the heater of the reaction chamber and the heater of the standard chamber to heat synchronously, and there is a temperature difference between the reaction chamber and the standard chamber, the differential thermal amplifier transmits a signal to the power compensation unit, and the power compensation unit controls the heating power of the compensation heater to change so as to maintain the temperature of the reaction chamber and the standard chamber to be the same.

[0016] Furthermore, the solid feeder is any one of a funnel-shaped feeder, a cylindrical feeder and an arc-shaped gripper.

[0017] Furthermore, the funnel-type sampler includes a loading barrel with upper and lower openings, a flip motor and a loading hopper that can be flipped up and down and controlled by the flip motor. The loading hopper is composed of two cones with two vertices connected to each other and not communicating with each other, and the middle part of the loading hopper is rotatably connected to the inner wall of the loading barrel.

[0018] Furthermore, the cylindrical sampler includes a loading barrel, a cylindrical push rod arranged in the loading barrel and a motor for controlling the up and down movement of the cylindrical push rod. The bottom of the loading barrel is provided with a bottom cover that opens and closes up and down. The motor controls the cylindrical push rod to push the bottom cover to open, thereby realizing automatic solid feeding.

[0019] Furthermore, the arc-shaped gripping clamp comprises two rods with arc-shaped bottom ends, the two rods are cross-movably connected, and the bottom of the arc-shaped gripping clamp can hold materials or clamp solid materials. When the arc-shaped gripping clamp is opened, automatic solid feeding is achieved.

[0020] Another object of the present invention is to provide a chemical compatibility testing method, which effectively solves the problem that the existing simple testing equipment is not rigorous and has high risks.

[0021] (1) A chemical compatibility testing method, using the reaction chamber of the chemical compatibility testing equipment described in Example 1, to test the compatibility of chemical A and chemical B by instantaneously generating heat and gas when the chemicals are mixed.

[0022] (i) When both chemical A and chemical B are liquid, the specific steps are:

[0023] S1. Add chemical A and chemical B into a first sample bottle and a second sample bottle respectively;

[0024] S2, setting the feeding amount, the controller controls the first liquid feeder to add chemical A into the test cup, and the controller controls the second liquid feeder to absorb chemical B and store chemical B in the sample tube of the second liquid feeder;

[0025] S3, setting the test temperature, the controller controls the heater or cooling jacket of the reaction chamber to work, so that the temperature in the reaction chamber gradually approaches the set test temperature, when the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the set value can be 0.1°C or other setting accuracy, the controller controls the chemical B to be added into the test cup, and the chemical A and chemical B begin to mix;

[0026] S4, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time, and stop the test when the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time;

[0027] If the heat generation or gas generation during the test is greater than the standard value, which may be 0 or other set parameters, then chemical A and chemical B are determined to be incompatible under the test conditions; otherwise, they are considered to be compatible under the test conditions.

[0028] (ii) When both chemical A and chemical B are solid, the specific steps are:

[0029] S1. Weigh chemical A and add it into the test cup, and weigh chemical B and add it into the solid feeder;

[0030] S2. Setting the test temperature, the controller controls the heater or cooling jacket of the reaction chamber to work, so that the temperature in the reaction chamber gradually approaches the set test temperature. When the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the set value can be 0.1°C or other set accuracy, the controller controls the solid feeder to add chemical B into the test cup, and chemical A and chemical B begin to mix;

[0031] S3, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time, and stop the test when the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time;

[0032] If the heat generation or gas generation during the test is greater than the standard value, which may be 0 or other set parameters, then chemical A and chemical B are determined to be incompatible under the test conditions; otherwise, they are considered to be compatible under the test conditions.

[0033] (iii) When one of the chemical A and the chemical B is solid and the other is liquid, the specific steps are:

[0034] S1. Add liquid chemicals into a first sample bottle;

[0035] S2, setting the feeding amount, the controller controls the first liquid feeder to add the liquid chemical into the test cup, and weighs the solid chemical and adds it to the solid feeder;

[0036] S3, setting the test temperature, the controller controls the heater or cooling jacket of the reaction chamber to work, so that the temperature in the reaction chamber gradually approaches the set test temperature, when the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the set value can be 0.1°C or other setting accuracy, the controller controls the solid feeder to automatically feed, and chemical A and chemical B begin to mix;

[0037] S4, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time, and stop the test when the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time;

[0038] If the heat generation or gas generation during the test is greater than the standard value, which may be 0 or other set parameters, then chemical A and chemical B are determined to be incompatible under the test conditions; otherwise, they are considered to be compatible under the test conditions.

[0039] (2) A chemical compatibility testing method, using the reaction chamber, the first testing chamber and the second testing chamber of the chemical compatibility testing device described in Example 1, to determine the compatibility of chemical A and chemical B by the initial exothermic temperature, the specific steps are:

[0040] S1. Add a certain amount of chemical A into the test cup of the first test chamber, add an equal amount of chemical B into the test cup of the second test chamber, and add an equal amount of a mixture of chemical A and chemical B into the test cup of the reaction chamber;

[0041] S2. Set the test temperature range and heating rate;

[0042] Heating rate △t=0.1-20℃ / min, temperature range is 30~500℃;

[0043] S3, start the test, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time. If the temperature change △t' in the test cup exceeds a certain value of the set heating rate, it is considered that the material generates heat, and the material temperature is tracked to maintain an adiabatic environment to obtain a heat generation curve;

[0044] When the temperature change △t' in the test cup exceeds a certain value of the set heating rate, the corresponding temperature in the test cup is the starting exothermic temperature of the sample;

[0045] If the onset exotherm temperature of the mixture is lower than both the onset exotherm temperature of chemical A and the onset exotherm temperature of chemical B, the two are considered incompatible.

[0046] (3) A chemical compatibility testing method, using the reaction chamber and the standard chamber of the chemical compatibility testing device described in Example 1, simulating the compatibility of chemical A and chemical B in a real container with heat loss, the specific steps are as follows:

[0047] S1. After setting the test starting temperature, maintain the temperature constant at the starting temperature setting value;

[0048] S2. When the absolute value of the difference between the actual temperature and the set temperature is less than the set value, which may be 0.1°C or other set accuracy, the test is started to control the material mixing, wherein the total amount of material in the reaction bin and the standard bin is kept consistent;

[0049] S3. Setting the material and thermal conductivity of the container to be simulated, the controller automatically calculates the heat loss, and the controller automatically adjusts the power of the heater or the cooling jacket according to the monitoring signals of the first temperature sensor and the second temperature sensor to achieve stable heat loss;

[0050] S4, the first temperature sensor monitors the temperature of the reaction chamber and the standard chamber. When there is a temperature difference between the reaction chamber and the standard chamber, the differential thermal amplifier transmits a signal to the power compensation unit, and the power compensation unit controls the heating power of the compensation heater to change so as to maintain the same temperature between the reaction chamber and the standard chamber;

[0051] By monitoring the change in the power of the compensation heater, a heat flow curve is obtained, and further the heat generation of chemical A and chemical B in the container with heat loss can be obtained.

[0052] If the heat or gas generated during the test is greater than the standard value, which may be 0 or other set parameters, chemical A and chemical B are determined to be incompatible under the heat dissipation condition; otherwise, they are considered to be compatible under the heat dissipation condition.

[0053] Compared with the prior art, the present invention has the following beneficial technical effects:

[0054] (1) The chemical compatibility testing equipment provided by the present invention is based on multiple calorimetric principles and can realize the compatibility evaluation of chemicals under various environmental conditions. It can quantitatively evaluate the compatibility of chemicals through experimental parameters such as initial exothermic temperature, heat generation power, heat flow curve, and pressure rise.

[0055] (2) The chemical compatibility testing equipment provided by the present invention can simulate the situation of chemicals in real equipment and evaluate the compatibility of chemicals when heat loss exists under specific temperature and pressure conditions.

[0056] (3) The present invention has broad application prospects and can be applied to the fields of compatibility research of complex-component chemicals, scientific and safe management of chemicals, risk assessment of chemical mixing, etc., or to hierarchical management of incompatible chemical groups based on compatibility classification. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0058] Figure 1 It is a schematic diagram of the position structure of the test chamber in the constant temperature closed reaction box of the present invention;

[0059] Figure 2 is a schematic diagram of the structure of the test chamber of the present invention;

[0060] Figure 3 It is a schematic diagram of the structure of the reaction bin and the standard bin of the present invention (the first liquid feeder, the second liquid feeder, the solid feeder, the gas feeder and the stirring device in the standard bin are omitted);

[0061] Figure 4 It is a structural schematic diagram of the funnel-type sample injector of the present invention;

[0062] Figure 5 It is a structural schematic diagram of the cylindrical sample injector of the present invention;

[0063] Figure 6 It is a schematic structural diagram of the arc-shaped grabbing clamp of the present invention;

[0064] Figure 7 is a test result curve diagram of Example 1 of the present invention;

[0065] Figure 8 is a test result curve diagram between nitrogen and potassium hydroxide aqueous solution in Example 2 of the present invention;

[0066] Fig. 9 is a test result curve diagram between nitrogen and sulfur dioxide gas in Example 2 of the present invention;

[0067] Fig.10 is a curve chart of test results between potassium hydroxide aqueous solution and sulfur dioxide gas in Example 2 of the present invention;

[0068] Fig.11 1 is a test result curve diagram of Example 3 of the present invention, wherein Figure (A) is a heat flow curve of chemical plant sewage A, Figure (B) is a heat flow curve of domestic sewage B, and Figure (C) is a heat flow curve of a mixture of chemical plant sewage A and domestic sewage B;

[0069] Fig.12 It is a test result curve diagram of Example 4 of the present invention. DETAILED DESCRIPTION

[0070] The present invention designs a chemical compatibility testing equipment, which is based on multiple calorimetric principles and realizes the compatibility evaluation of chemicals under multiple environmental conditions. The compatibility of chemicals can be quantitatively evaluated through experimental parameters such as the initial heat release temperature, heat generation power, heat flow curve, and pressure rise. The scenario of chemicals in real equipment can also be simulated to evaluate the compatibility of chemicals when heat loss exists under specific temperature and pressure conditions. Specific implementation method 1

[0072] like Figure 1-Figure 3 As shown, a chemical compatibility testing device includes a controller, a constant temperature sealed reaction box 1, and four independent test chambers 2 arranged in the constant temperature sealed reaction box 1, wherein the four test chambers 2 are a reaction chamber 21, a standard chamber 22, a first test chamber 23, and a second test chamber 24. In some specific embodiments, as Figure 1 As shown, the test chambers are arranged in a field shape in a constant temperature closed reaction box.

[0073] The test chamber 2 includes a cylindrical test cup 3 and a test cup cover 4. The top of the test cup cover 4 is telescopically connected to the inner top wall of the test chamber 2. Heaters 5 are evenly arranged on the inner side wall of the test cup 3 and the inner wall of the test cup cover 4. The inner side wall of the test cup 3 is also surrounded by a cooling jacket 6 for realizing the heat transfer function. A heat-equalizing interlayer is provided between the cooling jacket 6 and the heater 5 on the test cup 3. A compensation heater 7 is embedded in the bottom wall of the test cup 3. A pressure sensor 8 is provided on the inner side of the upper part of the test cup 3. A pressure relief device 9 is provided on the upper part of the test cup 3. The pressure relief pipe 91 of the pressure relief device 9 is connected to the laboratory ventilation equipment outside the test chamber 2. When the experiment is over, the gas can be discharged to the external laboratory ventilation equipment through the pressure relief pipe 91 of the pressure relief device 9. The ventilation equipment can be a fume hood, a universal ventilation hood, etc. A first temperature sensor 10 is provided at the bottom of the test cup 3.

[0074] The heater 5, the cooling jacket 6, the compensating heater 7, the pressure sensor 8, the pressure relief device 9 and the first temperature sensor 10 are all connected to the controller.

[0075] The test cup cover 4 is provided with a first liquid feeder 11, a second liquid feeder 12, a solid feeder 13, a retractable gas feeder 14 and a detachable stirring device 15. The gas feeder 14 is retractable. When testing the reaction between the gas-liquid sample, the gas feeder 14 can be controlled to extend below the liquid surface in the test cup 3 to achieve a good mixing of the gas-liquid sample. The stirring device 15 is mainly used to achieve uniform mixing of two chemicals during liquid-liquid reaction. When the stirring device 15 is not applicable in the solid reaction scenario, the stirring device 15 can be removed.

[0076] A second temperature sensor 16 is provided on the inner wall of the test cup cover 4, the first liquid feeder 11 passes through the test cup cover 4 and the test chamber 2 and is connected to the first sample bottle 17, the second liquid feeder 12 passes through the test cup cover 4 and the test chamber 2 and is connected to the second sample bottle 18, the gas feeder 14 passes through the test cup cover 4 and the test chamber 2 and is connected to the air outlet of the buffer assembly 19, and the solid feeder 13 passes through the test cup cover 4 and the test chamber 2.

[0077] The first liquid feeder 11, the second liquid feeder 12, the solid feeder 13, the gas feeder 14, the stirring device 15 and the second temperature sensor 16 are all connected to the controller.

[0078] The buffer component 19 has two air inlets, one of which is connected to the sample gas cylinder 20, and the other is connected to the outlet of the wet gas mixing module 25. The wet gas mixing module 25 has two inlets, which are respectively connected to the dry gas cylinder 26 and the wet gas generator 27. The buffer component 19 and the wet gas mixing module 25 are both connected to the controller.

[0079] The moisture generator 27 can generate water vapor with a humidity of 100%. After the 100% water vapor generated by the moisture generator 27 is mixed with the dry gas in the dry gas cylinder 26 in a certain proportion, gases with different humidity can be obtained, and then enter the test chamber 2 to replace the gas in the chamber to create a test environment with a set humidity. The dry gas refers to a gas that does not contain water. The gas needs to meet the requirement of not reacting with the chemicals to be tested. It is recommended to use inert gases such as nitrogen and helium. It is also possible to conduct a preliminary experiment on the reactivity of the dry gas to be used with the sample to be tested before the formal test.

[0080] When testing the reaction between gas and liquid samples at a certain humidity, the moisture generator 27 generates water vapor with a humidity of 100%, which is mixed with the dry gas in the dry gas cylinder 26 in a certain proportion to obtain gases with different humidity, which enter the test chamber 2 to replace the gas in the chamber and create a test environment with a set humidity. When the test starts, the gas feeder 14 extends below the liquid surface, and the sample gas cylinder 20 starts to take in gas, which is mixed with the moisture in the buffer assembly 19 and enters the test chamber 2.

[0081] A differential thermal amplifier 28 is connected between the first temperature sensor 10 of the reaction chamber 21 and the first temperature sensor 10 of the standard chamber 22, and a power compensation unit 29 is connected between the compensation heater 7 of the reaction chamber 21 and the compensation heater 7 of the standard chamber 22. The differential thermal amplifier 28 and the power compensation unit 29 are communicatively connected. When the controller controls the heater 5 of the reaction chamber 21 and the heater 5 of the standard chamber 22 to heat synchronously, and there is a temperature difference between the reaction chamber 21 and the standard chamber 22, the differential thermal amplifier 28 transmits a signal to the power compensation unit 29, and the power compensation unit 29 controls the heating power of the compensation heater 7 to change, so as to maintain the temperature of the reaction chamber 21 and the standard chamber 22 to be the same.

[0082] In some specific embodiments, such as Figure 4-6 As shown, the solid feeder is any one of a funnel-shaped feeder, a cylindrical feeder and an arc-shaped gripper.

[0083] like Figure 4 As shown, the funnel-type sampler includes a loading barrel 30 with upper and lower openings, a flip motor and a loading hopper 31 that can be flipped up and down and controlled by the flip motor. The loading hopper 31 is composed of two cones with two vertices connected and not connected to each other. The middle part of the loading hopper 31 is rotatably connected to the inner wall of the loading barrel 30.

[0084] like Figure 5 As shown, the cylindrical sampler includes a loading barrel 40, a cylindrical push rod 41 arranged in the loading barrel 40, and a motor for controlling the up and down movement of the cylindrical push rod 41. The bottom of the loading barrel 40 is provided with a bottom cover 42 that opens and closes up and down. The cylindrical push rod 41 is controlled by the motor to push the bottom cover 42 to open, thereby realizing automatic solid feeding.

[0085] like Figure 6 As shown, the arc-shaped gripper includes two rods 50 with arc-shaped bottom ends, the two rods 50 are cross-movably connected, and the bottom of the arc-shaped gripper can hold materials or clamp solid materials. When the arc-shaped gripper is opened, automatic solid feeding is achieved. In some specific embodiments, the arc-shaped gripper is arranged in a cylinder 51 with upper and lower openings.

[0086] The chemical compatibility testing device described in Specific Implementation 1 can realize a variety of chemical compatibility testing methods and meet a variety of calorimetric principle testing requirements, such as adiabatic testing, isothermal testing and differential scanning calorimetry testing.

[0087] The adiabatic test is performed by detecting the stable temperature of the test chamber 2 by the first temperature sensor 10 and the second temperature sensor 16, and the heater 5 is controlled by the controller to ensure that the ambient temperature is consistent with the sample temperature, so as to achieve the compatibility test under adiabatic conditions. After the materials are mixed, the heat flow curve of the sample under adiabatic conditions can be obtained according to the electrical signals detected by the first temperature sensor 10 and the second temperature sensor 16.

[0088] The isothermal test is performed by monitoring the temperature through the first temperature sensor 10 and the second temperature sensor 16, and the temperature is fed back to the controller. The controller controls the heater 5, the compensation heater 7 and the cooling jacket 6 to automatically adjust the heating and cooling power to maintain a constant temperature in the test chamber 2, thereby realizing compatibility testing in an isothermal environment.

[0089] The differential scanning calorimetry test is to detect the temperature of the sample and the reference material under a set temperature rise program. When there is a temperature difference between the sample and the reference material, the differential thermal amplifier 28 works and feeds back to the power compensation unit 29, so that the heating power of the compensation heater 7 changes to maintain the same temperature of the two. By recording the above power data, the heat flow curve of the sample can be obtained.

[0090] For specific testing methods, please refer to Specific Implementation Method 2, Specific Implementation Method 3 and Specific Implementation Method 4. Specific implementation method 2

[0092] A chemical compatibility testing method uses the reaction chamber of the chemical compatibility testing equipment described in Specific Implementation 1 to test the compatibility of chemical A and chemical B by instantaneously generating heat and gas when the chemicals are mixed.

[0093] (i) When both chemical A and chemical B are liquid, the specific steps are:

[0094] S1. Add chemical A and chemical B into a first sample bottle and a second sample bottle respectively. The first sample bottle and the second sample bottle are equipped with magnetic stirring rotors to ensure uniformity of the chemicals.

[0095] S2. Setting the feeding amount, the controller controls the first liquid feeder to add chemical A into the test cup, and the controller controls the second liquid feeder to absorb chemical B and store chemical B in the sample feeding tube of the second liquid feeder.

[0096] S3. Set the test temperature. The controller controls the heater or cooling jacket of the reaction chamber to work so that the temperature in the reaction chamber gradually approaches the set test temperature. When |actual temperature - set temperature| is less than 0.1°C, the controller controls chemical B to be added into the test cup, and chemical A and chemical B begin to mix.

[0097] S4, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time. When the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time, the test is stopped.

[0098] If the heat generation during the test is greater than 0 or the gas generation is greater than 0, then chemical A and chemical B are judged to be incompatible under the test conditions; otherwise, the two are considered to be compatible under the test conditions.

[0099] (ii) When both chemical A and chemical B are solid, the specific steps are:

[0100] S1. Weigh chemical A into the test cup and weigh chemical B into the solid feeder.

[0101] S2. Set the test temperature. The controller controls the heater or cooling jacket of the reaction chamber to work so that the temperature in the reaction chamber gradually approaches the set test temperature. When |actual temperature - set temperature| is less than 0.1°C, the controller controls the solid feeder to add chemical B into the test cup, and chemical A and chemical B begin to mix.

[0102] S3, the first temperature sensor, the second temperature sensor and the pressure sensor respectively monitor the temperature and pressure in the test cup, and transmit them to the controller in real time. When the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time, the test is stopped.

[0103] If the heat generation during the test is greater than 0 or the gas generation is greater than 0, then chemical A and chemical B are judged to be incompatible under the test conditions; otherwise, the two are considered to be compatible under the test conditions.

[0104] (iii) When one of the chemical A and the chemical B is solid and the other is liquid, the specific steps are:

[0105] S1. Add liquid chemicals into the first sample bottle.

[0106] S2. Setting the feeding amount, the controller controls the first liquid feeder to add the liquid chemical into the test cup, and weighs the solid chemical and adds it into the solid feeder.

[0107] S3. Set the test temperature. The controller controls the heater or cooling jacket of the reaction chamber to work so that the temperature in the reaction chamber gradually approaches the set test temperature. When |actual temperature - set temperature| is less than 0.1°C, the controller controls the solid feeder to automatically feed, and chemical A and chemical B begin to mix.

[0108] S4, the first temperature sensor, the second temperature sensor and the pressure sensor respectively monitor the temperature and pressure in the test cup, and transmit them to the controller in real time. When the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time, the test is stopped.

[0109] If the heat generation during the test is greater than 0 or the gas generation is greater than 0, then chemical A and chemical B are judged to be incompatible under the test conditions; otherwise, the two are considered to be compatible under the test conditions. Specific implementation method 3

[0111] A chemical compatibility testing method uses the reaction chamber, the first test chamber and the second test chamber of the chemical compatibility testing equipment described in Specific Implementation 1 to determine the compatibility of chemical A and chemical B by the starting exothermic temperature. The test is conducted on the case where chemical A and chemical B do not react when mixed at room temperature.

[0112] The specific steps are:

[0113] S1. Add a certain amount of chemical A to the test cup of the first test chamber, add an equal amount of chemical B to the test cup of the second test chamber, and add an equal amount of a mixture of chemical A and chemical B to the test cup of the reaction chamber. That is, the test quality of chemical A, chemical B, and the mixture of the two remains consistent.

[0114] S2. Set the test temperature range and heating rate;

[0115] The heating rate △t=0.1-20℃ / min, and the temperature range is 30~500℃.

[0116] S3. Start the test. The first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time. If the temperature change △t' in the test cup exceeds a certain value of the set heating rate (such as: △t'-△t>0.02℃ / min), it is considered that the material generates heat, and the material temperature is tracked to maintain an adiabatic environment to obtain a heat generation curve.

[0117] When the temperature change △t' in the test cup exceeds a certain value of the set heating rate, the corresponding temperature in the test cup is the starting exothermic temperature of the sample.

[0118] If the onset exotherm temperature of the mixture is lower than both the onset exotherm temperature of chemical A and the onset exotherm temperature of chemical B, the two are considered incompatible.

[0119] This experimental method can also analyze the compatibility of chemicals A and B based on the adiabatic temperature rise, heat release, and shape of the heat flow curve. Specific implementation method 4

[0121] A chemical compatibility testing method uses the reaction chamber and the standard chamber of the chemical compatibility testing device described in Specific Implementation 1 to simulate the compatibility of chemical A and chemical B in a real container with heat loss, and the specific steps are as follows:

[0122] S1. After setting the test starting temperature, maintain the temperature constant at the starting temperature setting value.

[0123] S2. When |actual temperature - set temperature| < 0.1°C, start the test and control the material mixing. The total amount of materials in the reaction bin and the standard bin remains consistent.

[0124] S3. Set the material and thermal conductivity of the container to be simulated. The controller automatically calculates the heat dissipation. The controller automatically adjusts the power of the heater or the cooling jacket according to the monitoring signals of the first temperature sensor and the second temperature sensor to achieve stable heat dissipation.

[0125] S4. The first temperature sensor monitors the temperature of the reaction chamber and the standard chamber. When there is a temperature difference between the reaction chamber and the standard chamber, the differential thermal amplifier transmits a signal to the power compensation unit, and the power compensation unit controls the heating power of the compensation heater to change to maintain the same temperature of the reaction chamber and the standard chamber. If the sample in the reaction chamber generates heat under the set temperature increase program, the power of the compensation heater in the standard chamber increases to maintain the same temperature of the two chambers; if the sample in the reaction chamber absorbs heat under the set temperature increase program, the power of the compensation heater in the reaction chamber increases.

[0126] By monitoring the change in the power of the compensation heater, a heat flow curve is obtained, and further the heat generation of chemical A and chemical B in the container with heat loss can be obtained.

[0127] If the heat or gas generated during the test is greater than the standard value, which may be 0 or other set parameters, chemical A and chemical B are determined to be incompatible under the heat dissipation condition; otherwise, they are considered to be compatible under the heat dissipation condition.

[0128] The chemical compatibility testing equipment provided by the present invention realizes the compatibility evaluation of chemicals under various environmental conditions based on various calorimetric principles, and can quantitatively evaluate the compatibility of chemicals through experimental parameters such as initial exothermic temperature, heat generation power, heat flow curve, and pressure rise.

[0129] The chemical compatibility testing equipment provided by the present invention can also simulate the scenario of chemicals in real equipment and evaluate the compatibility of chemicals when heat loss occurs under specific temperature and pressure conditions.

[0130] The present invention can be applied to the fields of compatibility research of complex-component chemicals, scientific and safe management of chemicals, risk assessment of chemical mixing, or hierarchical management of incompatible chemical groups based on compatibility classification, and has broad application prospects.

[0131] The specific implementation methods of the present invention will be described in detail below in conjunction with specific embodiments, comparative examples and drawings.

[0132] Example 1

[0133] The compatibility between the solid chemical citric acid and the liquid chemical sodium hydroxide aqueous solution was tested using the chemical compatibility testing equipment described in Specific Embodiment 1.

[0134] Before the test begins, a sodium hydroxide solution is placed in the first sample bottle, and the built-in magnetic stirring rotor of the first sample bottle is started to ensure the uniformity of the liquid sample.

[0135] Weigh 1g of citric acid and put it into the arc-shaped gripper. Select the adiabatic mode, monitor the temperature of the test chamber in real time through the first temperature sensor and the second temperature sensor, and transmit the signal to the controller in real time, and the controller controls the heater to ensure that the ambient temperature is consistent with the sample temperature.

[0136] Set the liquid addition amount to 1 ml and the test temperature to 90 degrees Celsius. The device automatically draws 1 ml of sodium hydroxide solution and adds it to the test cup in the test chamber. The heater or cooling jacket in the device starts working, making the system temperature gradually approach the set 90 degrees Celsius.

[0137] The temperature of the test chamber is monitored in real time by the first temperature sensor and the second temperature sensor, and a signal is transmitted to the controller in real time.

[0138] When |actual temperature - set temperature| < 0.1℃, the test starts. At this time, the arc-shaped gripper opens, solid chemical citric acid is automatically fed, and chemical citric acid and sodium hydroxide solution begin to mix. The first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure changes in the test chamber respectively. After 8 minutes, the measured temperature and pressure changes tend to be stable, and the test is stopped.

[0139] The test results are as follows Figure 7 As shown, it can be seen that there is obvious heat and gas generation during the test, the heat generation is greater than 0 and the gas generation is greater than 0. Therefore, the chemicals citric acid and sodium hydroxide aqueous solution are incompatible under the test conditions.

[0140] Comparative Example 1

[0141] The compatibility between citric acid and sodium hydroxide aqueous solution was evaluated based on the chemical composition and properties. The two will undergo an acid-base neutralization reaction, which is exothermic, so citric acid and sodium hydroxide aqueous solution are judged to be incompatible.

[0142] By comparing Example 1 with Comparative Example 1, the equipment test conclusion provided by the present invention is consistent with the theoretical prediction and is reliable.

[0143] Example 2

[0144] The chemical compatibility testing device described in Specific Embodiment 1 was used to test the compatibility between sulfur dioxide gas and liquid chemical potassium hydroxide aqueous solution in an environment with a humidity of 80%.

[0145] The dry gas in the dry gas cylinder uses nitrogen.

[0146] First, the compatibility between nitrogen gas and aqueous potassium hydroxide solution was tested.

[0147] Before the test begins, potassium hydroxide solution is placed in the first sample bottle, and the built-in magnetic stirring rotor of the first sample bottle is started to ensure the uniformity of the liquid sample.

[0148] Select isothermal test, monitor the temperature in real time through the first temperature sensor and the second temperature sensor, and transmit the signal to the controller in real time. The controller controls the operation of the heater, the compensation heater and the cooling jacket, and automatically adjusts the heating and cooling power through the heater, the compensation heater and the cooling jacket to maintain a constant temperature in the test chamber.

[0149] Set the liquid feed volume to 2 ml and the test temperature to 50 degrees Celsius. The first liquid feeder automatically draws 2 ml of potassium hydroxide solution and adds it to the test cup of the test chamber. The heater or cooling jacket starts working, so that the system temperature gradually approaches the set temperature of -50 degrees Celsius.

[0150] The temperature is monitored in real time by the first temperature sensor and the second temperature sensor, and a signal is transmitted to the controller in real time. When |actual temperature - set temperature| < 0.1°C, the test is started.

[0151] At this time, nitrogen is fed, and the chemical sulfur dioxide gas and potassium hydroxide solution begin to mix, and the first temperature sensor and the second temperature sensor monitor the temperature change of the test chamber in real time. After 20 minutes, the test is stopped.

[0152] Test results such as Figure 8 As shown, there is no obvious heat generation during the test process. Therefore, nitrogen and potassium hydroxide aqueous solution are compatible under the test conditions.

[0153] Next, the compatibility between nitrogen and sulfur dioxide gas was tested.

[0154] Select isothermal test, monitor the temperature in real time through the first temperature sensor and the second temperature sensor, and transmit the signal to the controller in real time. The controller controls the heater, compensation heater and cooling jacket to work, and automatically adjusts the heating and cooling power through the heater, compensation heater and cooling jacket to maintain a constant temperature in the test chamber.

[0155] Set the feed volume of both gases to 2 ml and the test temperature to 50 degrees Celsius. The equipment automatically feeds gas, adds 2 ml of sulfur dioxide gas into the test chamber, and the heater or cooling jacket in the equipment starts working, making the system temperature gradually approach the set temperature of -50 degrees Celsius.

[0156] The temperature is monitored in real time by the first temperature sensor and the second temperature sensor, and the signal is transmitted to the controller in real time. When |actual temperature - set temperature| < 0.1°C, the test starts. At this time, nitrogen is fed, nitrogen and sulfur dioxide gas begin to mix, and the first temperature sensor and the second temperature sensor monitor the temperature change of the test chamber. After 20 minutes, the test is stopped.

[0157] The test results are as follows Fig. 9 As shown, there is no obvious heat generation during the test process. Therefore, nitrogen and sulfur dioxide gases are compatible under the test conditions.

[0158] The above preliminary experiments prove that nitrogen can be used as a dry gas for determining the compatibility between sulfur dioxide gas and potassium hydroxide solution.

[0159] Finally, the compatibility between sulfur dioxide gas and potassium hydroxide solution was tested.

[0160] Before the test begins, potassium hydroxide solution is placed in the first sample bottle, and the built-in magnetic stirring rotor of the first sample bottle is started to ensure the uniformity of the liquid sample.

[0161] Select isothermal test, monitor the temperature in real time through the first temperature sensor and the second temperature sensor, and transmit the signal to the controller in real time. The controller controls the heater, compensation heater and cooling jacket to work, and the heater, compensation heater and cooling jacket automatically adjust the heating and cooling power to maintain a constant temperature in the test chamber.

[0162] The addition amount of potassium hydroxide solution was set to 0.5 ml, and the feed amount of sulfur dioxide gas was set to 1 ml; the test humidity was set to 80%; and the test temperature was set to 50 degrees Celsius.

[0163] The first liquid feeder automatically absorbs 0.5 ml of potassium hydroxide solution and adds it to the test chamber. The humidity generator generates water vapor with a humidity of 100%, which is mixed with the nitrogen in the dry gas cylinder at a set ratio to obtain gas with a humidity of 80%. The gas enters the test chamber to replace the gas in the chamber, thereby creating a test environment with a set humidity.

[0164] The heater or cooling jacket in the equipment starts working, making the system temperature gradually approach the set temperature of -50 degrees Celsius. The temperature is monitored in real time by the first temperature sensor and the second temperature sensor, and the signal is transmitted to the controller in real time. When |actual temperature - set temperature| < 0.1°C, the test starts. At this time, the gas injector extends below the liquid surface in the test cup, sulfur dioxide gas starts to feed, sulfur dioxide gas and potassium hydroxide solution begin to mix, and the first temperature sensor and the second temperature sensor monitor the temperature change of the test chamber. After 17 minutes, the measured heat flow change tends to be stable, and the test is stopped.

[0165] The test results are as follows Fig.10 As shown, it can be seen that there is obvious heat generation in the test process, and the heat generation is greater than 0. Therefore, the chemicals sulfur dioxide gas and potassium hydroxide aqueous solution are incompatible under the test conditions.

[0166] Comparative Example 2

[0167] The compatibility between sulfur dioxide gas and potassium hydroxide aqueous solution under 80% humidity was evaluated based on the chemical composition and properties. Sulfur dioxide dissolves in water to form sulfuric acid, which reacts with potassium hydroxide aqueous solution to produce acid-base neutralization, and the reaction is exothermic. Therefore, sulfur dioxide gas and potassium hydroxide aqueous solution are incompatible.

[0168] By comparing Example 2 with Comparative Example 2, the equipment test conclusion provided by the present invention is consistent with the theoretical prediction and is reliable.

[0169] Example 3

[0170] The compatibility between chemical plant wastewater A and domestic wastewater B was evaluated and tested using the chemical compatibility testing equipment described in Specific Embodiment 1.

[0171] Chemical plant sewage A and domestic sewage B are added into the first sample bottle and the second sample bottle of the equipment respectively, and the built-in magnetic stirring rotors of the first sample bottle and the second sample bottle rotate to ensure the uniformity of the liquid samples.

[0172] The feeding volume is set to 0.7 ml, and the test temperature is set to 30 degrees Celsius. The first liquid feeder automatically sucks the chemical plant sewage A and adds it to the test cup, and the domestic sewage B is automatically sucked by the second liquid feeder and stored in the sample tube of the second liquid feeder.

[0173] The heater or cooling jacket in the equipment works to gradually approach the system temperature to the set test temperature of -30 degrees Celsius. The temperature is monitored in real time by the first temperature sensor and the second temperature sensor, and the signal is transmitted to the controller in real time. If |actual temperature - set temperature| < 0.1°C, the test starts automatically. At this time, domestic sewage B is automatically added to the test cup, and chemical plant sewage A and domestic sewage B begin to mix. The first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature change and pressure change of the test chamber respectively. After 1 hour, stop the test.

[0174] If there is no heat or gas generation during the test process, it is considered that chemical plant wastewater A and domestic wastewater B do not react when mixed at room temperature.

[0175] The compatibility between the chemical plant wastewater A and the domestic wastewater B was further determined based on the heat release. The test was performed using a reaction chamber, a first test chamber, and a second test chamber.

[0176] The liquid sample volume is set to 2 ml. Chemical plant sewage A is added to the first test chamber, domestic sewage B is added to the second test chamber 2, and a mixture of chemical plant sewage A and domestic sewage B is added to the reaction chamber, and the amount of the three materials remains the same.

[0177] The temperature range and heating rate of the test were set, the heating rate △t = 20°C / min, and the temperature range was 30-300°C.

[0178] When the test starts, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time. The heat flow curve of the test process is as follows: Fig.11 shown.

[0179] The heat release of chemical plant wastewater A is 825 J / g, the heat release of domestic sewage B is 914 J / g, and the heat release of the mixture of chemical plant wastewater A and domestic sewage B is 1219 J / g, and the unit heat release is significantly increased. Therefore, chemical plant wastewater A and domestic sewage B are incompatible.

[0180] Comparative Example 3

[0181] The compatibility between chemical plant wastewater A and domestic wastewater B is evaluated based on the chemical composition and properties. The two wastewaters have complex and diverse components. Only through rigorous component analysis tests can some component information be clarified, and the compatibility between the two cannot be evaluated.

[0182] Compared with Example 3 and Comparative Example 3, the equipment test provided by the present invention is simple, intuitive and reliable.

[0183] Embodiment 4:

[0184] The compatibility of the chemicals tar and light oil in the presence of heat loss in a real container is simulated, and the compatibility of the chemicals tar and light oil in the presence of heat loss in a real container is evaluated using the reaction chamber and the standard chamber of the chemical compatibility testing equipment described in Specific Implementation 1.

[0185] Chemical tar and light oil are added into the first sample bottle and the second sample bottle of the equipment respectively, and the built-in magnetic stirring rotors of the first sample bottle and the second sample bottle rotate to ensure the uniformity of the liquid samples.

[0186] Set the addition volume to 2 ml, set the starting temperature of the test to 80 degrees Celsius, and the ending temperature to 480 degrees Celsius.

[0187] The first liquid feeder automatically adds chemical tar into the test cup, and the second liquid feeder automatically absorbs light oil and stores it in the sample feeding tube of the second liquid feeder.

[0188] The material of the evaluation container is set to plastic, and the thermal conductivity is about 0.65. The controller automatically calculates the heat loss. The controller automatically adjusts the power of the heater or the cooling jacket according to the monitoring signals of the first temperature sensor and the second temperature sensor to achieve stable heat dissipation.

[0189] After setting the test temperature, first maintain the temperature constant at the starting temperature, and when |actual temperature - set temperature| is less than 0.1℃, start the test and the equipment automatically controls the material mixing.

[0190] The first temperature sensor monitors the temperature of the reaction chamber and the standard chamber. When there is a temperature difference between the reaction chamber and the standard chamber, the differential thermal amplifier transmits a signal to the power compensation unit, which controls the heating power of the compensation heater to change so as to maintain the same temperature between the reaction chamber and the standard chamber.

[0191] By monitoring the change of the power of the compensating heater, the heat flow curve is obtained, and further the heat generation of tar and light oil in the equipment with heat loss can be obtained.

[0192] Test results such as Fig.12 As shown, chemical tar and light oil are incompatible, and the key parameters obtained are an initial exothermic temperature of 175 degrees Celsius, an exothermic peak of 197 degrees Celsius, and a heat release of 678 J / g.

[0193] Comparative Example 4:

[0194] The C600 equipment was used to test the mixture of chemical tar and light oil at 0.5℃ / min, 1℃ / min, and 2℃ / min from 80℃ to 480℃, and three heat flow curves were obtained. The AKTS software was used for thermal analysis and thermodynamic simulation to simulate heat dissipation, and the performance data of the material being plastic with a thermal conductivity of about 0.65 was obtained, the starting exothermic temperature was 179℃, the exothermic peak was 205℃, and the heat release was 713J / g.

[0195] Comparing Example 4 and Comparative Example 4, the thermal stability data under heat dissipation conditions obtained by the two methods are basically the same. However, the test of Example 4 only takes 1 day, while the entire process of Comparative Example 4 takes 5 days.

[0196] Therefore, the chemical compatibility testing equipment provided by the present invention can simulate the scenario of chemicals in real equipment and evaluate the compatibility of chemicals when heat loss exists under specific temperature and pressure conditions. The testing process is simple and the test results are reliable.

[0197] It is worth noting that the terms "first" and "second" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0198] In the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium; if the connection method is not specifically stated, conventional means mature in the prior art are adopted. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0199] In the description of this specification, the description with reference to the term "some specific embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0200] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A chemical compatibility testing device, characterized in that: It includes a controller, a constant temperature sealed reaction box, and four independent test chambers arranged in the constant temperature sealed reaction box, wherein the four test chambers are a reaction chamber, a standard chamber, a first test chamber, and a second test chamber; The test chamber comprises a test cup and a test cup cover, the top end of the test cup cover is telescopically connected to the inner top wall of the test chamber, heaters are evenly arranged on the inner side wall of the test cup and the inner wall of the test cup cover, the inner side wall of the test cup is also surrounded by a cooling jacket for realizing a heat transfer function, an interlayer capable of equalizing heat is provided between the cooling jacket and the heater on the test cup, a compensation heater is embedded in the bottom wall of the test cup, a pressure sensor is provided on the inner side of the upper part of the test cup, a pressure relief device is provided on the upper part of the test cup, and a first temperature sensor is provided at the bottom of the test cup; The heater, cooling jacket, compensation heater, pressure sensor, pressure relief device and first temperature sensor are all connected to the controller; The test cup cover is provided with a first liquid feeder, a second liquid feeder, a solid feeder, a retractable gas feeder and a detachable stirring device, the inner wall of the test cup cover is provided with a second temperature sensor, the first liquid feeder passes through the test cup cover and the test chamber and is connected to the first sample bottle, the second liquid feeder passes through the test cup cover and the test chamber and is connected to the second sample bottle, and the gas feeder passes through the test cup cover and the test chamber and is connected to the gas outlet of the buffer assembly; The first liquid feeder, the second liquid feeder, the solid feeder, the gas feeder, the stirring device and the second temperature sensor are all connected to the controller; The buffer assembly has two air inlets, one of which is connected to the sample gas cylinder, and the other is connected to the outlet of the wet gas mixing module. The wet gas mixing module has two inlets, which are respectively connected to the dry gas cylinder and the wet gas generator; The buffer component and the moisture mixing module are both connected to the controller; A differential thermal amplifier is connected between the first temperature sensor of the reaction chamber and the first temperature sensor of the standard chamber, and a power compensation unit is connected between the compensation heater of the reaction chamber and the compensation heater of the standard chamber. The differential thermal amplifier and the power compensation unit are communicatively connected. When the controller controls the heater of the reaction chamber and the heater of the standard chamber to heat synchronously, and there is a temperature difference between the reaction chamber and the standard chamber, the differential thermal amplifier transmits a signal to the power compensation unit, and the power compensation unit controls the heating power of the compensation heater to change so as to maintain the temperature of the reaction chamber and the standard chamber to be the same.

2. The chemical compatibility testing equipment according to claim 1, characterized in that: The solid feeder is any one of a funnel-shaped feeder, a cylindrical feeder and an arc-shaped gripper.

3. The chemical compatibility testing equipment according to claim 2, characterized in that: The funnel-type sampler includes a loading barrel with upper and lower openings, a flip motor and a loading hopper that can be flipped up and down and controlled by the flip motor. The loading hopper consists of two cones with connected vertices and not connected to each other. The middle part of the loading hopper is rotatably connected to the inner wall of the loading barrel.

4. The chemical compatibility testing equipment according to claim 2, characterized in that: The cylindrical sampler includes a loading barrel, a cylindrical push rod arranged in the loading barrel and a motor for controlling the up and down movement of the cylindrical push rod. The bottom of the loading barrel is provided with a bottom cover that opens and closes up and down. The motor controls the cylindrical push rod to push the bottom cover to open, thereby realizing automatic solid feeding.

5. The chemical compatibility testing equipment according to claim 2, characterized in that: The arc-shaped gripping clamp comprises two rods with arc-shaped bottom ends, the two rods are cross-movably connected, and the bottom of the arc-shaped gripping clamp can hold materials or clamp solid materials. When the arc-shaped gripping clamp is opened, automatic solid feeding is realized.

6. A chemical compatibility testing method, characterized in that: Using the reaction chamber of the chemical compatibility testing equipment according to any one of claims 1 to 5, the compatibility of chemical A and chemical B is tested by mixing the chemicals to generate heat and gas instantaneously, wherein both chemical A and chemical B are liquids, and the specific steps are as follows: S1. Add chemical A and chemical B into a first sample bottle and a second sample bottle respectively; S2, setting the feeding amount, the controller controls the first liquid feeder to add chemical A into the test cup, and the controller controls the second liquid feeder to absorb chemical B and store chemical B in the sample tube of the second liquid feeder; S3, setting the test temperature, the controller controls the heater or cooling jacket of the reaction chamber to work, so that the temperature in the reaction chamber gradually approaches the set test temperature, when the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the controller controls the chemical B to be added into the test cup, and the chemical A and chemical B begin to mix; S4, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time, and stop the test when the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time; If the heat or gas generated during the test is greater than the standard value, it is determined that chemical A and chemical B are incompatible under the test conditions, otherwise they are considered to be compatible under the test conditions.

7. The chemical compatibility testing method according to claim 6, characterized in that: In step S3, when |actual temperature - set temperature| is less than 0.1°C, the controller controls chemical B to be added into the test cup; in step S4, if the heat generation is greater than 0 or the gas generation is greater than 0 during the test, it is determined that chemical A and chemical B are incompatible under the test conditions, otherwise they are considered to be compatible under the test conditions.

8. A chemical compatibility testing method, characterized in that: Using the reaction chamber of the chemical compatibility testing equipment according to any one of claims 1 to 5, the compatibility of chemical A and chemical B is tested by mixing the chemicals to generate heat and gas instantaneously, wherein both chemical A and chemical B are solids, and the specific steps are as follows: S1. Weigh chemical A and add it into the test cup, and weigh chemical B and add it into the solid feeder; S2. Set the test temperature. The controller controls the heater or cooling jacket of the reaction chamber to work so that the temperature in the reaction chamber gradually approaches the set test temperature. When the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the controller controls the solid feeder to add chemical B into the test cup, and chemical A and chemical B begin to mix. S3, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time, and stop the test when the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time; If the heat or gas generated during the test is greater than the standard value, it is determined that chemical A and chemical B are incompatible under the test conditions, otherwise they are considered to be compatible under the test conditions.

9. The chemical compatibility testing method according to claim 8, characterized in that: In step S2, when |actual temperature - set temperature| is less than 0.1°C, the controller controls the solid feeder to add chemical B into the test cup; in step S3, if the heat generation is greater than 0 or the gas generation is greater than 0 during the test, it is determined that chemical A and chemical B are incompatible under the test conditions, otherwise they are considered to be compatible under the test conditions.

10. A chemical compatibility testing method, characterized in that: Using the reaction chamber of the chemical compatibility testing device according to any one of claims 1 to 5, the compatibility of chemical A and chemical B is tested by mixing the chemicals to generate heat and gas instantaneously, wherein one of the chemical A and chemical B is solid and the other is liquid, and the specific steps are as follows: S1. Add liquid chemicals into a first sample bottle; S2, setting the feeding amount, the controller controls the first liquid feeder to add the liquid chemical into the test cup, and weighs the solid chemical and adds it to the solid feeder; S3, setting the test temperature, the controller controls the heater or cooling jacket of the reaction chamber to work, so that the temperature in the reaction chamber gradually approaches the set test temperature. When the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the controller controls the solid feeder to automatically feed, and chemical A and chemical B begin to mix; S4, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time, and stop the test when the temperature and pressure changes in the test cup tend to be stable or the test reaches a certain time; If the heat or gas generated during the test is greater than the standard value, it is determined that chemical A and chemical B are incompatible under the test conditions, otherwise they are considered to be compatible under the test conditions.

11. The chemical compatibility testing method according to claim 10, characterized in that: In step S3, when |actual temperature - set temperature| is less than 0.1°C, the controller controls the solid feeder to automatically feed; in step S4, if the heat generation is greater than 0 or the gas generation is greater than 0 during the test, it is determined that chemical A and chemical B are incompatible under the test conditions, otherwise they are considered to be compatible under the test conditions.

12. A chemical compatibility testing method, characterized in that: Using the reaction chamber, the first test chamber and the second test chamber of the chemical compatibility test device according to any one of claims 1 to 5, the compatibility of chemical A and chemical B is determined by the initial exothermic temperature, and the specific steps are: S1. Add a certain amount of chemical A into the test cup of the first test chamber, add an equal amount of chemical B into the test cup of the second test chamber, and add an equal amount of a mixture of chemical A and chemical B into the test cup of the reaction chamber; S2. Set the test temperature range and heating rate; S3, start the test, the first temperature sensor, the second temperature sensor and the pressure sensor monitor the temperature and pressure in the test cup respectively, and transmit them to the controller in real time. If the temperature change in the test cup exceeds a certain value of the set heating rate, it is considered that the material generates heat, and the material temperature is tracked to maintain an adiabatic environment to obtain a heat generation curve; When the temperature change in the test cup exceeds a certain value of the set heating rate, the corresponding temperature in the test cup is the starting exothermic temperature of the sample; If the onset exotherm temperature of the mixture is lower than both the onset exotherm temperature of chemical A and the onset exotherm temperature of chemical B, the two are considered incompatible.

13. The chemical compatibility testing method according to claim 12, characterized in that: In step S2, the heating rate Δt=0.1-20°C / min, and the test temperature range is 30-500°C.

14. A chemical compatibility testing method, characterized in that: Using the reaction chamber and the standard chamber of the chemical compatibility testing device according to any one of claims 1 to 5, the compatibility of chemical A and chemical B in a real container with heat loss is simulated, and the specific steps are as follows: S1. After setting the test starting temperature, maintain the temperature constant at the starting temperature setting value; S2. When the absolute value of the difference between the actual temperature and the set temperature is less than the set value, the test is started to control the material mixing, wherein the total amount of material in the reaction bin and the standard bin is kept consistent; S3. Setting the material and thermal conductivity of the container to be simulated, the controller automatically calculates the heat loss, and the controller automatically adjusts the power of the heater or the cooling jacket according to the monitoring signals of the first temperature sensor and the second temperature sensor to achieve stable heat loss; S4, the first temperature sensor monitors the temperature of the reaction chamber and the standard chamber. When there is a temperature difference between the reaction chamber and the standard chamber, the differential thermal amplifier transmits a signal to the power compensation unit, and the power compensation unit controls the heating power of the compensation heater to change so as to maintain the same temperature between the reaction chamber and the standard chamber; By monitoring the change of the power of the compensation heater, the heat flow curve is obtained, and the heat generation of chemical A and chemical B in the container with heat dissipation can be further obtained; If the heat or gas generated during the test is greater than the standard value, it is determined that chemical A and chemical B are incompatible under the heat dissipation condition; otherwise, the two are considered to be compatible under the heat dissipation condition.

15. The chemical compatibility testing method according to claim 14, characterized in that: In step S2, when |actual temperature - set temperature| < 0.1°C, the test is started to control the material mixing; in step S4, if the heat production is > 0 or the gas production is > 0 during the test, it is determined that chemical A and chemical B are incompatible under the heat dissipation condition, otherwise the two are considered to be compatible under the heat dissipation condition.

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