Method and device for accurately detecting gas production performance of reagent

Abstract

The invention discloses a method and a device for accurately detecting the gas production performance of a reagent, the detection device is characterized in that a reactor is respectively connected with a raw material tank and a condenser pipe, a first solenoid valve is arranged between the condenser pipe and the reactor, the condenser pipe is respectively connected with a sucking pump and a spherical bottle provided with a liquid level meter, and a second solenoid valve is arranged between the condenser pipe and the reactor; the spherical bottle provided with a liquid level meter is connected with the first spherical bottle; the top end of the spherical bottle provided with the liquid level meter is provided with the liquid level meter, and the liquid level meter is in circuit connection with the display controller; the detection method comprises the following steps: collecting produced gas in a spherical bottle provided with a liquid level meter, recording the produced gas through the liquid level meter, metering the extracted gas through an air extracting pump, converting the revolution of the air extracting pump into the volume of the produced gas, and calculating to obtain the generation amount of the gas, such as carbon dioxide, of a reagent. The device has the advantages of simplicity in operation, small influence of human factors, accuracy in metering and the like, and can be popularized and applied to various reagents with gas production metering requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas production detection, and in particular relates to a method and device for accurately detecting gas production conditions. Background Art

[0002] Leavening agents are substances added during food processing that can make products gasify to form dense porous structures, thus making the products fluffy, soft or crispy. They are also important additives that determine the volume of foods such as bread, steamed buns, cakes, and biscuits. The principle of the leavening agent is to mix the leavening agent into the dough, and decompose it during high-temperature baking, releasing a large amount of gas, making the product fluffy and forming a loose and porous structure; this loose and porous structure can allow saliva to quickly penetrate into the spongy structure of the food during chewing, and use saliva to decompose the soluble substances in the food, stimulate the taste buds, and enable people to taste the flavor of the food more quickly; after that, the food enters the human stomach organ, and the loose and soft spongy food structure allows various digestive enzymes to enter it at the fastest speed, so that the food can be quickly digested and absorbed by the human body, thereby avoiding the loss of nutrients in the food during the human digestion process.

[0003] It can be seen that the gas production and gas production speed of the leavening agent have an important impact on the taste and volume of food. When the gas production is low, the fluffiness is not enough; when the gas production is too high, the excessive volume expansion affects the taste; when the gas production speed is too fast, the food will expand quickly at the beginning of baking, and the food structure has not yet condensed, and it will collapse in the later stage and the texture will be rough and uneven; when the gas production speed is too slow, the expansion is too slow at the beginning of baking, and after the structure condenses, some leavening agents have not released carbon dioxide gas, resulting in a small volume increase, which loses the meaning of using leavening agents. However, GB2760-2024 currently only stipulates the use regulations and types of food additives, and GB1886.245-2016 informs the method for determining the amount of carbon dioxide gas generated, which is to mix the reagent with hydrochloric acid solution, shake in a water bath, read the liquid level scale in the gas measuring tube after a period of time, and correct it with the atmospheric pressure under standard conditions to obtain the volume of carbon dioxide generated by the reagent.

[0004] Chinese patent CN101526458A discloses a method for monitoring the gas evolution rate of disodium dihydrogen pyrophosphate, which comprises mixing flour, milk powder, salt, edible oil, sodium bicarbonate and disodium dihydrogen pyrophosphate evenly, reacting in a stirrer at 27°C for at least 3 minutes, then adding 27°C experimental water into the stirrer, sealing and stirring at a uniform speed for 3 minutes, measuring the total volume of gas generated per minute with two organs and a water level plate, stopping in time after 10 minutes, and calculating the gas evolution rate of disodium dihydrogen pyrophosphate based on the total volume of gas generated in the first 8 minutes; the method has the characteristics of simple equipment, small investment, no pollution and safety. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the gas production method in the prior art is relatively rough and is easily affected by changes in atmospheric pressure or human reading deviations and other factors that affect the detection accuracy. In view of the above technical problems, the present invention provides a method and device for accurately detecting gas production conditions, wherein the reagent to be detected and the raw material are mixed in a sealed reactor to generate gas, and the generated gas is collected in a spherical bottle equipped with a liquid level meter after condensation, and the gas production time is measured by the liquid level change time, and the liquid level change situation can be visualized as the gas production amount; then, a vacuum pump is used to extract and measure the gas in the spherical bottle equipped with a liquid level meter, and the gas production time and gas production volume can be accurately measured, so as to achieve accurate detection of the gas production of products such as leavening agents, with high detection accuracy and simple method, and the influence of human factors and external factors such as atmospheric pressure is eliminated.

[0006] In order to solve the above problems, the present invention provides the following technical solutions.

[0007] Technical Solution 1: A method for accurately detecting the gas production performance of a reagent, characterized by comprising the following steps:

[0008] (1) injecting the replacement fluid into a spherical bottle provided with a liquid level gauge so that the liquid level in the spherical bottle provided with the liquid level gauge is level with the liquid level gauge;

[0009] (2) placing a reagent whose gas production performance is to be tested and a reaction raw material in a reactor, opening a first solenoid valve between the condenser and the reactor, and carrying out a reaction;

[0010] (3) condensing the gas generated by the reaction and collecting it in the spherical bottle provided with a liquid level gauge;

[0011] (4) closing the first solenoid valve between the condenser and the reactor, and using a vacuum pump to draw the gas in the spherical bottle provided with a liquid level gauge into the vacuum pump. When the liquid level in the spherical bottle provided with a liquid level gauge returns to the initial position, stopping the vacuum and calculating the gas volume;

[0012] The display controller is used to control the start and stop of the vacuum pump and to record the change in the liquid level of the liquid level meter to achieve accurate detection of the gas production amount and / or gas production speed of the reagent.

[0013] Technical Solution 2: The method for accurately detecting the gas production performance of a reagent according to Technical Solution 1 is characterized in that: the first solenoid valve is connected to a display controller, and the display controller controls the opening and closing of the gas path generated by the reaction by controlling the opening and closing of the first solenoid valve; the liquid level meter is connected to the display controller, and the liquid level height is detected by the liquid level meter and the liquid level height signal is transmitted to the display controller; and the vacuum pump is connected to the display controller, and during the vacuuming process, the vacuum volume signal from the vacuum pump is transmitted to the display controller, and the display controller controls the start and stop of the vacuum pump;

[0014] Preferably, in step (2), the reaction raw materials are added by controlling the display controller; and / or the display controller controls the opening and closing of the first solenoid valve while recording the reaction time.

[0015] Technical Solution 3: The method for accurately detecting the gas production performance of a reagent according to Technical Solution 1 or 2 is characterized in that the vacuum pump includes a screw slide module, a metering injector and a support plate.

[0016] Technical Solution 4: The method for accurately detecting the gas production performance of the reagent according to any one of Technical Solutions 1-3 is characterized in that: the gas extracted by the vacuum pump enters the metering sampler, and the display controller can rotate the screw slide module of the vacuum pump through the driving motor, and the volume of the gas extracted by the vacuum pump is calculated by the number of rotations.

[0017] Technical Solution 5: A method for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 1-4, characterized in that the calculation formula for the gas volume is V=C / 36*N, wherein V is the gas volume in mL, C is the number of times the screw slide module of the vacuum pump rotates 10°, and N is the amount of air extracted by one rotation of the vacuum pump.

[0018] Technical Solution 6: The method for accurately detecting the gas production performance of reagents according to any one of Technical Solutions 1-5 is characterized in that: the reactor includes two or more reactors, and a first solenoid valve is provided between each of the two or more reactors and the condenser to measure the gas production performance of two or more reagents. When detecting the gas production amount or gas production rate of one of the reagents, other solenoid valves provided between other reactors and the condenser are in a closed state.

[0019] That is to say, the method of the present invention is a method that can detect the gas generation performance of various reagents.

[0020] Technical Solution 7: A device for accurately detecting the gas production performance of a reagent, characterized in that: the device comprises a reactor 3, a condenser 10, a spherical bottle 16 provided with a liquid level gauge, an air pump 17 and a display controller 18; wherein the reactor 3 is equipped with a raw material tank, the reactor 3 is connected to the condenser 10, and a first solenoid valve for controlling the opening and isolation of the gas path is provided on the gas path between the reactor 3 and the condenser 10, the condenser 10 is respectively connected to the air pump 17 and the spherical bottle 16 provided with a liquid level gauge, and the spherical bottle 16 provided with a liquid level gauge contains a replacement fluid;

[0021] The first solenoid valve is connected to the display controller 18, and the liquid level meter 13 is connected to the display controller 18. The first solenoid valve and the liquid level meter 13 are respectively controlled by the display controller 18; the vacuum pump 17 is connected to the display controller 18, and the start and stop of the vacuum pump 17 is controlled by the display controller 18 and the volume of gas extracted from the vacuum pump 17 is read.

[0022] Technical Solution 8: The device for accurately detecting the gas production performance of reagents according to Technical Solution 6 is characterized in that: the raw material tank includes at least one, two or three of a first raw material tank 7, a second raw material tank 8 and a third raw material tank 9; preferably, the raw material tank is controlled by a display controller 18 to add raw materials and / or test agents to the reactor 3; further preferably, the addition of raw materials and / or test agents is controlled by a peristaltic pump arranged on the raw material tank.

[0023] And / or, the liquid level meter 13 is arranged at the top of the spherical bottle 16 provided with the liquid level meter;

[0024] Further preferably, the liquid level meter 13 feeds back the detected liquid level signal to the display controller 18, which controls the start and stop of the vacuum pump and reads the volume of gas extracted from the vacuum pump 17, thereby accurately detecting the reagent gas production and / or gas production speed.

[0025] Technical solution 9: The device for accurately detecting the gas production performance of a reagent according to technical solution 7 or 8 is characterized in that: a stirrer 4 is provided inside the reactor 3, a water bath 2 is provided outside the reactor 3, and the middle part is fixed by a buckle 6;

[0026] Preferably, a magnetic stirrer 1 is provided at the bottom of the water bath 2 , and a first temperature sensor 5 is provided inside the water bath 2 .

[0027] Technical Solution 10: The device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-9 is characterized in that: the gas generated by the reaction in the reactor 3 is condensed and collected in the spherical bottle 16 provided with a liquid level gauge via the condenser 10; one end of the condenser 10 is connected to the cooling water collection tank 12 pipeline, and the other end is connected to the cooling water storage tank 11 pipeline; a second temperature sensor 24 is provided on the upper part of the condenser 10; the cooling water temperature in the cooling water storage tank 11 is preferably controlled so that the inside of the condenser 10 is cooled by the cooling water, and more preferably the cooling water temperature is displayed and controlled by a display controller 18.

[0028] Technical Solution 11: The device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-10 is characterized in that: the spherical bottle 16 provided with a liquid level gauge is connected to the first spherical bottle 14, and the first spherical bottle 14 contains replacement fluid, and the replacement fluid is supplied to the spherical bottle 16 provided with a liquid level gauge through the first spherical bottle 14; preferably, the first spherical bottle 14 is connected to the replacement fluid storage tank 15 via a second solenoid valve 19, and the second solenoid valve 19 is connected to the display controller 18.

[0029] Technical Solution 12: A device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-11, characterized in that the replacement fluid in the replacement fluid storage tank 15 is replenished into the first spherical bottle 14 and the spherical bottle 16 provided with a liquid level gauge by using a second solenoid valve 19, wherein the second solenoid valve 19 is controlled by a display controller 18.

[0030] Technical Solution 13: The device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-12 is characterized in that: the first spherical bottle 14 is provided with an open mouth 20, so that the first spherical bottle 14 is in contact with the atmosphere.

[0031] Technical Solution 14: The device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-13 is characterized in that the vacuum pump includes a screw slide module 21, a metering injector 22 and a support plate 23.

[0032] Technical Solution 15: The device for accurately detecting the gas production performance of reagents according to Technical Solution 14 is characterized in that: one end of the metering injector 22 is connected to the condenser 10 pipeline, and the other end is connected to the screw slide module 21, and the screw slide module 21 is connected to the display controller 18 line; the screw slide module 21 is provided with a stepper motor, and the display controller 18 controls the stepper motor to start and stop the vacuum pump 17 according to the signal collected by the liquid level meter 13.

[0033] Technical Solution 16: The device for accurately detecting the gas production performance of reagents according to Technical Solution 15 is characterized in that the gas extracted by the vacuum pump 17 enters the metering sampler 22, and the display controller can rotate the screw slide module 21 of the vacuum pump 17 through the driving motor, and the volume of gas extracted by the vacuum pump is calculated by the number of rotations.

[0034] Technical Solution 17: The device for accurately detecting the gas production performance of reagents according to Technical Solution 16 is characterized in that the calculation formula for the gas volume is V=C / 36*N, where V is the gas volume in mL, C is the number of times the screw slide module 21 of the vacuum pump 17 rotates 10°, and N is the amount of air extracted by one rotation of the vacuum pump 17.

[0035] Technical Solution 18: The device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-17 is characterized in that the reading of the vacuum pump 17 is calculated by a computer connected thereto and then input into the display controller 18 and displayed on the display controller 18.

[0036] Technical Solution 19: The device for accurately detecting the gas production performance of a reagent according to any one of Technical Solutions 7-18 is characterized in that: the display controller 18 controls the second solenoid valve 19 to add replacement fluid to the first spherical bottle or the spherical bottle provided with a liquid level gauge, or the display controller 18 controls the start and stop of the vacuum pump 17, or the display controller records the change in the liquid level of the liquid level gauge 13, or the display controller 18 controls the raw material tank, preferably by controlling the peristaltic pump to control the addition of reaction raw materials and / or test agents. When adding reaction raw materials or test agents, signal transmission is achieved through wifi, Bluetooth or circuit connection.

[0037] Technical Solution 20: According to any one of Technical Solutions 7-19, the device for accurately detecting the gas production performance of reagents contains two or more reactors, and the two or more reactors are respectively connected to the condenser 10, so that the device can measure the gas production performance of two or more reagents. When detecting the gas production amount or gas production rate of one of the reagents, other solenoid valves arranged between other reactors and the condenser are in a closed state.

[0038] Technical Solution 21: A method for accurately detecting the gas production performance of a reagent using the device described in any one of Technical Solutions 7-19, characterized in that it comprises the following steps:

[0039] (1) injecting the replacement fluid into a spherical bottle provided with a liquid level gauge so that the liquid level in the spherical bottle provided with the liquid level gauge is level with the liquid level gauge;

[0040] (2) placing a reagent whose gas production performance is to be tested and a reaction raw material in a reactor, opening a first solenoid valve between the condenser and the reactor, and carrying out a reaction;

[0041] (3) condensing the gas generated by the reaction and collecting it in the spherical bottle provided with a liquid level gauge;

[0042] (4) closing the first solenoid valve between the condenser and the reactor, and using a vacuum pump to draw the gas in the spherical bottle provided with a liquid level gauge into the vacuum pump. When the liquid level in the spherical bottle provided with a liquid level gauge returns to the initial position, stopping the vacuum and calculating the gas volume;

[0043] The display controller is used to control the start and stop of the vacuum pump and to record the change in the liquid level of the liquid level meter to achieve accurate detection of the gas production amount and / or gas production speed of the reagent.

[0044] Technical Solution 22: A method for accurately detecting the gas production performance of a leavening agent using the device described in any one of Technical Solutions 7-19, characterized in that it comprises the following steps:

[0045] (1) injecting the replacement fluid into a spherical bottle provided with a liquid level gauge so that the liquid level in the spherical bottle provided with the liquid level gauge is level with the liquid level gauge;

[0046] (2) placing a reagent whose gas production performance is to be tested and a reaction raw material in a reactor, opening a first solenoid valve between the condenser and the reactor, and carrying out a reaction;

[0047] (3) condensing the gas generated by the reaction and collecting it in the spherical bottle provided with a liquid level gauge;

[0048] (4) closing the first solenoid valve between the condenser and the reactor, and using a vacuum pump to draw the gas in the spherical bottle provided with a liquid level gauge into the vacuum pump. When the liquid level in the spherical bottle provided with a liquid level gauge returns to the initial position, stopping the vacuum and calculating the gas volume;

[0049] The display controller is used to control the start and stop of the vacuum pump and to record the change in the liquid level of the liquid level meter to achieve accurate detection of the gas production amount and / or gas production speed of the reagent.

[0050] Technical Solution 23: The method according to Technical Solution 1-6 or Technical Solution 21 or Technical Solution 22 is characterized in that: the calculation of the gas volume in step (4) also includes the process of using a vacuum pump 17 to pump air into the metering sampler 22 of the vacuum pump 17 without adding the test agent to measure the blank air volume, and the gas production is calculated by subtracting the blank air volume from the gas volume using the following formula (1):

[0051]

[0052] Where: 101.3 is the atmospheric pressure under standard conditions, in kilopascals (kPa);

[0053] 273 is the temperature under standard conditions, in degrees Kelvin (K), t is the reading of the temperature sensor 24 during the measurement, in degrees Celsius (°C);

[0054] P1 is the corrected atmospheric pressure during measurement, in kilopascals (kPa);

[0055] P2 is the corrected saturated vapor pressure of water at t°C, in kilopascals (kPa);

[0056] m is the mass of the reagent, in g;

[0057] V1 is the gas volume V1 obtained by calculating the number of revolutions of the screw slide module 21 after the reaction is completed by pumping the gas in the spherical bottle 16 equipped with a liquid level meter into the vacuum pump 17, in mL;

[0058] V2 is the blank air volume of the spherical bottle equipped with a liquid level meter measured by the metering sampler 22 when the entire reaction system is evacuated by a vacuum pump when no test agent is added, and the unit is mL.

[0059] Technical Solution 24: The method according to Technical Solution 1-6 or Technical Solution 21 or Technical Solution 22 is characterized in that the gas production of the test agent is calculated by the following calculation formula (2):

[0060]

[0061] Where:

[0062] V----After the reaction is completed, the gas in the spherical bottle 16 equipped with a liquid level meter is pumped into the vacuum pump 17, and the gas volume V is calculated by the number of rotations of the screw slide module 21, in mL;

[0063] m---Actual weighed mass of the reagent, in g.

[0064] The beneficial effects of the present invention are:

[0065] 1. The device of the present invention can record the reaction time by opening the first solenoid valve, and collect the gas generated by the reaction in a spherical bottle equipped with a liquid level meter after condensation; the gas production volume can be visualized by the change of the liquid level; then, a vacuum pump is used to draw the gas collected in the spherical bottle equipped with a liquid level meter into the vacuum pump, and the gas production volume is measured by the vacuum pump. Then, the gas production volume is used to calculate the gas generation amount of the reagent, thereby realizing accurate measurement of the gas production of the reagent without the need for manual reading, and further improving the detection accuracy.

[0066] 2. Use the display controller to control the vacuum pump and realize automatic vacuuming. In addition, the display controller also collects signal data from the liquid level meter and the vacuum pump, controls the start and stop of the vacuum pump through the signal collected by the liquid level meter, and then calculates the reading of the vacuum pump and displays it directly on the display controller, so that the operator can directly obtain the test results and reduce the complexity of calculation and operation.

[0067] 3. In a further preferred embodiment, the display controller is used to control the second solenoid valve and / or the peristaltic pump on the raw material tank to achieve automatic replenishment of the replacement fluid and / or automatic addition of the reaction raw materials. The reaction raw materials can be ensured to be in full contact with the test agent without disassembling the reactor, which not only simplifies the operation steps, but also ensures accurate liquid level detection during the blank test, thereby improving the operation accuracy.

[0068] 3. The present invention is applicable to the detection of various gas-producing substances, such as sodium bicarbonate, disodium dihydrogen pyrophosphate and other leavening agents, and other substances that need to detect gas production, such as substances that produce carbon dioxide gas, and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0070] Figure 2 It is a schematic diagram of the structure of the air extraction pump in the device of the present invention;

[0071] Figure 3 It is a structural schematic diagram of a gas production device for measuring the prior art;

[0072] In the figure, 1 is a magnetic stirrer, 2 is a water bath, 3 is a reactor, 4 is a stirrer, 5 is a first temperature sensor, 6 is a buckle, 7 is a first raw material tank, 8 is a second raw material tank, 9 is a third raw material tank, 10 is a condenser, 11 is a cooling water storage tank, 12 is a cooling water collection tank, 13 is a liquid level meter, 14 is a first spherical bottle, 15 is a displacement liquid storage tank, 16 is a spherical bottle with a liquid level meter, 17 is a vacuum pump, 18 is a display controller, 19 is a second solenoid valve, 20 is an open port, 21 is a screw slide module, 22 is a metering injector, 23 is a support plate, and 24 is a second temperature sensor; 1a is a round-bottom flask for gas generation; 2a is a water bath; 3a is a dropping funnel; 4a is a condenser; 5a is a three-way valve; 6a is a gas measuring tube with a jacket; 7a is a level bottle; 8a is a thermometer; 9a is a rubber stopper; 10a is a rubber hose. DETAILED DESCRIPTION

[0073] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It is worth noting that the following embodiments are only preferred embodiments of the present invention and should not be understood as limiting the present invention. The protection scope of the present invention shall be based on the contents recorded in the claims. Any modification or replacement made by those skilled in the art to the technical solution of the present invention without creative work shall fall within the protection scope of the present invention.

[0074] Example 1 Structure of the detection device

[0075] like Figure 1 As shown, the device of the present invention comprises a reactor 3, a condenser 10, a spherical bottle 16 provided with a liquid level gauge, an air pump 17 and a display controller 18;

[0076] The reactor 3 is equipped with a raw material tank, the reactor 3 is connected to the condenser 10, and a first solenoid valve (not shown) for controlling the opening and closing of the gas path of the generated gas is provided between the reactor 3 and the condenser 10, the condenser 10 is respectively connected to the vacuum pump 17 and the spherical bottle 16 provided with a liquid level gauge, and the spherical bottle 16 provided with a liquid level gauge contains a replacement liquid; wherein the gas generated by the reaction of the reactor 3 is condensed and collected in the spherical bottle 16 provided with a liquid level gauge via the condenser 10;

[0077] The first solenoid valve is connected to the display controller 18, and the liquid level meter 13 is connected to the display controller 18. The first solenoid valve and the liquid level meter 13 are controlled by the display controller 18 respectively; the display controller 18 controls the opening and closing of the first solenoid valve and records the gas production time; the liquid level meter 13 is controlled by the display controller 18 and records the liquid level change; the air pump 17 is connected to the display controller 18, and the start and stop of the air pump 17 is controlled by the display controller 18 and the volume of gas extracted from the air pump 17 is read, so as to accurately detect the gas production amount and / or gas production speed of the reagent. In addition, the display controller 18 can also form a curve chart based on the detected gas production amount, gas production time, and gas production speed data for industrial production research.

[0078] That is to say, the display controller 18 opens the first solenoid valve to open the gas path between the reactor 3 and the condenser 10, releasing the gas to flow into the condenser, and recording the gas production time at the same time. The generated gas enters the spherical bottle 16 equipped with a liquid level meter after condensation. The liquid level meter 13 will feed back the signal of detecting that the liquid level returns to the initial height to the display controller 18, and the display controller 18 controls the closing of the vacuum pump, so as to record the change in the liquid level height of the liquid level meter to realize accurate detection of the reagent gas production and / or gas production rate.

[0079] In a specific embodiment of the present invention, Figure 1As shown, the device for accurately detecting gas production of the present invention, the reactor 3 is connected with the first raw material tank 7, the second raw material tank 8, the third raw material tank 9 and the condenser 10 respectively, the first raw material tank 7, the second raw material tank 8 and the third raw material tank 9 respectively store different raw materials, and the raw materials are transported into the reactor 3, wherein the raw material transport pipelines of the first raw material tank 7, the second raw material tank 8 and the third raw material tank 9 are respectively provided with peristaltic pumps, and the peristaltic pumps are connected with the display controller 18 to control the transport volume and transport speed; the condenser 10 is used to condense the generated gas to eliminate the influence of water vapor. The condenser 10 has one end connected to the cooling water collecting tank 12 pipeline, and the other end connected to the cooling water storage tank 11 pipeline; a second temperature sensor 24 is provided on the upper part of the condenser 10; the cooling water temperature in the cooling water storage tank 11 is preferably controlled so as to cool the inside of the condenser 10 by the cooling water, and more preferably the cooling water temperature is displayed and controlled by a display controller 18; the condenser 10 is respectively connected to the vacuum pump 17 and the spherical bottle 16 provided with a liquid level gauge, and the spherical bottle 16 provided with a liquid level gauge is connected to the first spherical bottle 14.

[0080] The reactor 3 is connected to the raw material tank, and the condenser is connected to the reactor through a pipeline (such as a hose or a glass tube). A first solenoid valve is also arranged between the condenser and the reactor. The display controller 18 controls the start and stop of the first solenoid valve to realize the opening and isolation of the control gas path; the vacuum pump 17 is connected to the display controller 18, which is used to control the start and stop of the vacuum pump 17, and read the vacuum volume in the vacuum pump 17, and display the volume reading; the position of the liquid level meter 13 is level with the top of the liquid surface, which is used to detect the change of the liquid level. The liquid level meter will feed back the detected signal to the display controller 18, and decide whether to start the vacuum pump 17 to extract or shut down the vacuum pump according to the liquid level. Specifically, when the reaction is completed, the first solenoid valve is closed to isolate the gas path between the condenser and the reactor; then start to pump gas; when the liquid level returns to the initial liquid level height, stop pumping gas; the vacuum pump will display the volume of the extracted gas through the display controller 18.

[0081] In a preferred embodiment, the reactor 3 is provided with a stirrer 4 for stirring and mixing the raw materials under the action of magnetic force to ensure sufficient reaction, and a detachable water bath pot 2 is provided outside to provide a water bath environment according to detection needs.

[0082] In a further preferred embodiment, a magnetic stirrer 1 is provided at the bottom of the water bath 2 to drive a stirrer 4 to help mix the raw materials; a first temperature sensor 5 is provided in the water bath 2 to detect the temperature in the water bath 2 in real time.

[0083] In a preferred embodiment, one end of the condenser 10 is connected to the cooling water collection tank 12 pipeline, and the other end is connected to the cooling water storage tank 11 pipeline, wherein the cooling water temperature in the cooling water storage tank 11 is controlled so that the inside of the condenser 10 is cooled by the cooling water, wherein the cooling water temperature is displayed and controlled by a display controller 18; a second temperature sensor 24 is provided on the upper part of the condenser 10 for detecting the saturated vapor temperature (t) of water, thereby obtaining the saturated vapor pressure of water.

[0084] In a preferred embodiment, a liquid level gauge 13 is provided at the top of the spherical bottle 16 provided with a liquid level gauge, and the position of the liquid level gauge 13 is level with the top of the liquid surface, and is used to detect the change time and liquid level change of the liquid level; wherein the liquid level gauge 13 is controlled by a display controller 18, and a recording unit and a display light are provided on the liquid level gauge to record the liquid level state, and the liquid level gauge transmits the liquid level height signal to the display controller through the recording unit; wherein the display controller 18 controls the first solenoid valve on the gas path between the condenser 10 and the reactor 3 to control the opening and closing of the control gas path; when the reaction starts, the first solenoid valve is opened by the display controller 18, and the gas generated by the reaction flows into the spherical bottle 16 provided with the liquid level gauge, during which the liquid level gauge 13 detects the liquid level signal The signal is transmitted to the display controller 18; when the reaction ends at the specified time, the first solenoid valve is closed by the display controller 18 to cut off the gas path between the condenser and the reactor, and then the vacuum pump 17 is started by the display controller 18 to evacuate the gas. When the liquid level in the spherical bottle 16 equipped with a liquid level meter returns to the initial height of the liquid level position, the liquid level meter 13 transmits the detected liquid level signal to the display controller 18, and then the vacuum pump 17 is closed. The vacuum volume measured in the vacuum pump 17 is displayed by the display controller 18, and the reading of the vacuum pump 17 is calculated by the connected computer and input to the display controller 18 and displayed on the display controller 18; the display controller 18 is connected to a computer, and the various data obtained can be exported for industrial production research.

[0085] In a preferred embodiment, the first spherical bottle 14 is connected to the replacement fluid storage tank 15 via the second solenoid valve 19, and the replacement fluid in the replacement fluid storage tank 15 is added to the first spherical bottle 14 and the spherical bottle 16 with a liquid level gauge by the second solenoid valve 19, wherein the solenoid valve 19 is controlled by the display controller 18; in another specific embodiment, in order to reduce costs, the second solenoid valve 19 may not be provided, but the replacement fluid is manually controlled to be added from the replacement fluid storage tank 15 to the spherical bottle 16 with a liquid level gauge, or the replacement fluid storage tank 15 and the second solenoid valve 19 may not be provided, but the replacement fluid is directly manually added to the spherical bottle 16 with a liquid level gauge. Among them, the replacement fluid in the system can be discharged through the drain valve (not shown) provided on the pipeline between the first spherical bottle 14 and the spherical bottle 16 with a liquid level gauge. In addition, the first spherical bottle 14 is provided with an opening 20, so that the first spherical bottle is in an open state to the atmosphere.

[0086] In a preferred embodiment, the vacuum pump 17 is connected to a display controller 18 for controlling the start and stop of the vacuum pump 17, reading the vacuum volume in the vacuum pump 17, and displaying the volume reading.

[0087] In a more preferred embodiment, the vacuum pump is composed of a screw slide module 21 , a metering injector 22 and a support plate 23 .

[0088] In a further preferred embodiment, one end of the metering injector 22 is connected to the condenser 10 pipeline, and the other end is connected to the screw slide module 21, and the screw slide module 21 is connected to the display controller 18 line; when exhausting air, the display controller 18 drives the motor and the screw slide module 21 rotates, and the gas is drawn from the device into the metering injector 22, and the gas volume is calculated by the number of rotations of the screw slide module 21, and finally the gas volume is displayed on the display controller 18; wherein a stepper motor is provided in the screw slide module 21, and the rotation speed of the stepper motor is adjustable, and the rotation speed is inversely proportional to the detection accuracy.

[0089] The display controller 18 of the present invention controls the second solenoid valve 19 to add replacement fluid to the first spherical bottle or the spherical bottle equipped with a liquid level gauge, or the display controller 18 controls the start and stop of the vacuum pump 17, or the display controller records the liquid level change of the liquid level gauge 13, or the display controller 18 controls the raw material tank (preferably by controlling the peristaltic pump to control the addition of reaction raw materials and / or test agents) to add reaction raw materials or reagents to be tested for gas production performance, and signal transmission is achieved through wifi or Bluetooth or circuit connection.

[0090] In a preferred specific embodiment, the device of the present invention contains two or more reactors, and the two or more reactors are respectively connected to the condenser 10 (sharing one condenser), so that the device can measure the gas production performance of two or more reagents. When detecting the gas production amount or gas production rate of one of the reagents, other solenoid valves arranged between other reactors and the condenser are in a closed state.

[0091] Detection Example 1 Application Detection

[0092] Taking the Baizuan double-effect baking powder produced by Angel Yeast Company as an example, the gas production is tested. The specific steps are as follows:

[0093] (1) System self-check and initialization calibration: Turn on the display controller 18 to perform system self-check and initialization calibration to balance the atmospheric pressure P1; wherein, add ultrapure water to the first raw material tank 7 and hydrochloric acid solution to the second raw material tank 8, and then control the peristaltic pump to discharge the gas in the raw material delivery pipeline for calibration; turn on the water bath to maintain the temperature at 75°C and then heat up the entire device. After the temperature is balanced, the second temperature sensor 24 detects the saturated steam temperature t of water, and the calibrated saturated steam pressure P2 of water is obtained by referring to Appendix C of GB1886.245-2016;

[0094] (2) Prepare the replacement solution: weigh 100 g of sodium chloride and place it in a beaker, add 350 mL of water to dissolve it, then add 1 g of sodium bicarbonate and 2 drops of methyl orange indicator solution, add hydrochloric acid solution until the solution turns slightly red, and then place the replacement solution in the replacement solution storage tank 15;

[0095] (3) Adjust the liquid level to be level with the position of the liquid level gauge 13 by adding replacement fluid: open the second solenoid valve 19 to add the replacement fluid in the replacement fluid storage tank 15 into the spherical bottle 16 provided with the liquid level gauge through the first spherical bottle 14, so that the liquid level in the spherical bottle 16 provided with the liquid level gauge is level with the position of the liquid level gauge 13, and the liquid level gauge 13 lights up red; at the same time, pass cooling water into the condenser 10;

[0096] (4) Adding the reagent Baizuan double-effect baking powder to the reactor: Turn on the water bath 2 to keep the temperature at 75° C. Accurately weigh 1.0002 g of the reagent Baizuan double-effect baking powder (m) and add it to the reactor 3. Then seal the reactor 3 with the buckle 6, connect the pipeline and place it in the water bath 2;

[0097] (5) Using the display controller 18 to control the peristaltic pump between the reactor and the raw material tank to add ultrapure water and hydrochloric acid to the reactor for reaction: controlling the peristaltic pump to add 100 ml of ultrapure water and 20 ml of hydrochloric acid solution (prepared according to a volume ratio of 37% concentrated hydrochloric acid and water of 1:2) to the reactor 3, respectively, and at the same time controlling the magnetic stirrer 1 to turn on, so that the stirrer in the reactor 3 rotates, the reagent is mixed with the solution, and the reaction is fully reacted to produce gas;

[0098] (6) When the reaction reaches the specified time, the first solenoid valve between the condenser and the reactor is closed after the reaction is terminated, and the gas path is cut off to terminate the reaction and obtain the recorded reaction time: when the liquid level in the spherical bottle 16 provided with a liquid level gauge begins to drop, the red light of the liquid level gauge 13 goes out, and when the liquid level returns to the initial height, the gas extraction is stopped;

[0099] (7) Using the display controller 18 to control the vacuum pump to extract the gas in the spherical bottle to calculate the suction volume V1, the motor in the screw slide module 21 is turned on, and the gas in the spherical bottle 16 equipped with a liquid level meter is pumped into the metering sampler 22, and the gas volume V1 is calculated by the number of rotations of the screw slide module 21; wherein the calculation formula is V1 = C / 36*N; wherein V1 is the gas volume, in mL, C is the number of times the vacuum pump rotates 10°, 36 represents the degree of each portion after 360° is divided into 10 portions, and N represents the suction volume of the vacuum pump after one rotation. In this device, the value of N is 7.33 mL;

[0100] (8) Repeat steps (4) to (7) without adding the test agent to perform a blank experiment to obtain the gas volume V2;

[0101] (9) Calculate the amount of carbon dioxide gas generated by baking powder, W, using the following formula:

[0102]

[0103] Where: 101.3 is the atmospheric pressure under standard conditions, in kilopascals (kPa);

[0104] 273 is the temperature under standard conditions, in degrees Kelvin (K), t is the reading of the temperature sensor 24 during the measurement, in degrees Celsius (°C);

[0105] P1 is the corrected atmospheric pressure during measurement, in kilopascals (kPa);

[0106] P2 is the corrected saturated vapor pressure of water at t°C, in kilopascals (kPa);

[0107] V1 is the gas volume obtained by pumping the gas from the spherical bottle 16 equipped with a liquid level meter into the metering injector 22 after the reaction is completed, and the unit is mL, calculated by the number of rotations of the screw slide module 21;

[0108] V2 is the volume of blank air in the spherical bottle equipped with a liquid level gauge measured by the metering injector 22 after the entire reaction system is evacuated by a vacuum pump before the test agent is added (except that the test agent is not added in the blank test, other operations and the types and amounts of the reaction raw materials added are the same as those in the measurement test), and the unit is mL;

[0109] The results showed that the measured gas volume V1-V2 was 64.437057 mL, so the volume W of carbon dioxide produced per gram of reagent was calculated to be 56.09 mL / g.

[0110] Comparative Example 1

[0111] Referring to the contents of A.3 in the Chinese national standard GB1886.245-2016, the baking powder in Example 1 is added to the mixture according to the material proportions in Example 2. Figure 3 In the gas generating round-bottom flask 1a of the device shown, the specific operating steps are carried out according to the standard to carry out the operating reaction and measure the amount of carbon dioxide gas generated. The results show that the volume of gas generated V1-V2 is 64mL. Therefore, the calculation formula is the same as that in Example 1. The calculated volume W of carbon dioxide generated per gram of reagent is 55.71mL / g.

[0112] Detection Example 2

[0113] Taking the commercially available disodium dihydrogen pyrophosphate as an example, the specific steps for detecting the gas production after the reaction of acidic salt with sodium bicarbonate are as follows:

[0114] (1)-(3) System calibration and initialization, replacement fluid replenishment and liquid level meter adjustment are the same as those in Test Example 1.

[0115] (4) Adding reagents to the reactor: Accurately weigh 0.5000 g of the reagent disodium dihydrogen pyrophosphate (m) and 0.5000 g of sodium bicarbonate into the reactor 3, and then seal the reactor 3 with the buckle 6;

[0116] (5) Using the display controller 18 to control and add ultrapure water to the reactor for reaction: by controlling the peristaltic pump to add 50 mL of ultrapure water to the reactor 3, the magnetic stirrer 1 is turned on to rotate the stirrer in the reactor 3 to mix the reagent with the solution to fully react and produce gas;

[0117] (6) End of reaction: After 5 minutes of reaction, close the first solenoid valve between the condenser and the reactor to cut off the gas path.

[0118] The vacuum pumping process, blank test, and result calculation process are the same as steps (7) to (9) of Example 2;

[0119] The results showed that the measured gas volume V1-V2 was 59.482970 mL, which was the same as the calculation formula in Example 1. The calculated volume W of carbon dioxide produced per gram of reagent and sodium bicarbonate was 103.73 mL / g.

[0120] Comparative Example 2

[0121] Refer to the contents of A.3 in Chinese national standard GB1886.245-2016 for the reagents in Example 3, and add them according to the material ratio in Example 3. Figure 3 In the gas generating round-bottom flask 1a of the device shown, the specific operating steps are carried out according to the standard to carry out the operating reaction and measure the amount of carbon dioxide gas generated. The results show that the volume of gas generated V1-V2 is 58mL, which is the same as the calculation formula in Example 1. The volume of carbon dioxide W generated by each gram of reagent and sodium bicarbonate is calculated to be 101.14mL / g.

[0122] Detection Example 3

[0123] Taking the baking powder produced by Angel Yeast Company as an example, the gas production test is carried out. The specific steps are as follows:

[0124] (1)-(3) System calibration and initialization, replacement fluid replenishment and liquid level meter adjustment are the same as in Example 2.

[0125] (4) Adding reagents to the reactor: Accurately weigh 1.7000 g of baking powder (m) into the reactor 3, and then seal the reactor 3 with the buckle 6;

[0126] (5) Turn off the water bath heating, and use the display controller 18 to control and add ultrapure water and sulfuric acid to the reactor for reaction: control the peristaltic pump to add 10 mL of sulfuric acid solution (prepared according to the volume ratio of 98% concentrated sulfuric acid and water of 1:5, that is, 1 part of acid to 5 parts of water) into the reactor 3, and at the same time control the magnetic stirrer 1 to turn on, so that the stirrer in the reactor 3 rotates, mixes the reagent with the solution, and fully reacts to produce gas;

[0127] (6) End of reaction: After 5 minutes of reaction, close the first solenoid valve between the condenser and the reactor to cut off the gas path.

[0128] The vacuum pumping process is the same as step (7) in Example 2;

[0129] (8) Calculate the amount of carbon dioxide gas generated by baking powder, W, using the following formula (using the formula in standard AACCI-12-20.01):

[0130]

[0131] Where:

[0132] V----After the reaction is completed, the gas in the spherical bottle 16 equipped with a liquid level meter is pumped into the vacuum pump 17, and the gas volume is calculated by the number of rotations of the screw slide module 21, and the unit is mL; wherein, since the 10 mL of sulfuric acid solution added in step (5) is added after the reactor is sealed, when calculating the amount of carbon dioxide gas generated W using the formula in standard AACCI-12-20.01, it is necessary to subtract the 10 mL from the gas volume V;

[0133] m---Actual weighed mass of reagent, in g;

[0134] The correction value is obtained by consulting the AACC-12-29.01 table based on the gas temperature and pressure during the extraction.

[0135] The results showed that the measured gas volume V was 183.625971 mL, so the carbon dioxide production generated by the reagent was calculated to be 17.38%.

[0136] Comparative Example 3

[0137] The reagents in Example 4 were tested according to the material ratios in Example 3 with reference to the contents of the reference standard AACC-12-29.01. The specific operating steps were carried out in accordance with the standard to carry out the operating reaction and measure the amount of carbon dioxide gas generated. The results showed that the volume of gas generated V was 181 mL, which was the same as the calculation formula in Example 3. Therefore, the carbon dioxide production generated by the reagent was calculated to be 17.11%.

[0138] Obviously, it can be seen from the above comparative examples 1-3 that, since the volume of gas generated by the reaction according to the current standard method in the prior art is confirmed by observing the change of the liquid level scale with the naked eye, it cannot be controlled by the display controller like the device operation of the present invention; and, Figure 3 The addition of reaction materials such as hydrochloric acid solution and water to the device is manual. Figure 3 The amount of gas generated during the determination process of the device and the existing standard method cannot be accurately detected. However, the device of the present invention controls the addition of the reaction materials by setting a display controller, and controls the opening and closing of the gas path between the reactor and the condenser by the first solenoid valve, so as to determine when to start pumping gas, and obtain the liquid level height change signal detected by the liquid level meter to determine when the vacuum pump ends the vacuum pumping. In addition, the gas volume can be calculated by the number of rotations of the vacuum pump screw slide module, and the information can be transmitted to the display controller to calculate the gas volume and gas production rate generated by the unit weight of the reagent to form a curve graph.

[0139] The above embodiments and comparative examples show that the device and method of the present invention are suitable for detecting a variety of gas-producing substances, such as sodium bicarbonate, disodium dihydrogen pyrophosphate and other leavening agents and other substances whose gas production needs to be detected, and can be widely promoted and applied.

[0140] The above are specific implementations of the device and method of the present invention. Various changes and substitutions may be made to the present invention without violating the spirit and principles of the present invention, and these changes and substitutions are all within the protection scope of the present invention.

Claims

1. A method for accurately detecting the gas production performance of a reagent, characterized in that: The steps include: (1) injecting the replacement fluid into a spherical bottle provided with a liquid level gauge so that the liquid level in the spherical bottle provided with the liquid level gauge is level with the liquid level gauge; (2) placing a reagent whose gas production performance is to be tested and a reaction raw material in a reactor, opening a first solenoid valve between the condenser and the reactor, and carrying out a reaction; (3) condensing the gas generated by the reaction and collecting it in the spherical bottle provided with a liquid level gauge; (4) closing the first solenoid valve between the condenser and the reactor, and using a vacuum pump to draw the gas in the spherical bottle provided with a liquid level gauge into the vacuum pump. When the liquid level in the spherical bottle provided with a liquid level gauge returns to the initial position, stopping the vacuuming, and calculating the gas volume; The display controller is used to control the start and stop of the vacuum pump and to record the change in the liquid level of the liquid level meter to achieve accurate detection of the gas production amount and / or gas production speed of the reagent.

2. The method for accurately detecting the gas production performance of a reagent according to claim 1, characterized in that: The first solenoid valve is connected to the display controller, and the display controller controls the opening and closing of the gas path generated by the reaction by controlling the opening and closing of the first solenoid valve; the liquid level meter is connected to the display controller, and the liquid level height is detected by the liquid level meter and the liquid level height signal is transmitted to the display controller; and the air pump is connected to the display controller, and during the air pumping process, the air pumping amount signal from the air pump is transmitted to the display controller, and the display controller controls the start and stop of the air pump; Preferably, in step (2), the reaction raw materials are added by controlling the display controller; and / or the display controller controls the opening and closing of the first solenoid valve while recording the reaction time.

3. The method for accurately detecting the gas production performance of a reagent according to claim 1 or 2, characterized in that: The vacuum pump comprises a screw slide module, a metering injector and a support plate.

4. The method for accurately detecting the gas production performance of a reagent according to any one of claims 1 to 3, characterized in that: The gas extracted by the vacuum pump enters the metering sample injector, and the display controller can rotate the screw slide module of the vacuum pump by driving the motor, and the volume of the gas extracted by the vacuum pump is calculated by the number of rotations.

5. The method for accurately detecting the gas production performance of a reagent according to any one of claims 1 to 4, characterized in that: The calculation formula for the gas volume is V=C / 36*N, where V is the gas volume in mL, C is the number of times the screw slide module of the vacuum pump rotates 10°, and N is the amount of air pumped per one rotation of the vacuum pump.

6. The method for accurately detecting the gas production performance of a reagent according to any one of claims 1 to 5, characterized in that: The reactor includes two or more reactors, and a first solenoid valve is provided between each of the two or more reactors and the condenser to measure the gas production performance of two or more reagents. When detecting the gas production amount or gas production speed of one of the reagents, other solenoid valves provided between other reactors and the condenser are in a closed state.

7. A device for accurately detecting the gas production performance of a reagent, characterized in that: The device comprises a reactor (3), a condenser (10), a spherical bottle (16) provided with a liquid level gauge, an air pump (17) and a display controller (18); wherein the reactor (3) is provided with a raw material tank, the reactor (3) is connected to the condenser (10), and a first electromagnetic valve for controlling the opening and closing of the gas path is provided on the gas path between the reactor (3) and the condenser (10), the condenser (10) is respectively connected to the air pump (17) and the spherical bottle (16) provided with a liquid level gauge, and the spherical bottle (16) provided with a liquid level gauge contains a replacement fluid; The first solenoid valve is connected to the display controller (18), and the liquid level meter (13) is connected to the display controller (18). The first solenoid valve and the liquid level meter (13) are respectively controlled by the display controller (18); the vacuum pump (17) is connected to the display controller (18), and the start and stop of the vacuum pump (17) is controlled by the display controller (18) and the volume of gas extracted from the vacuum pump (17) is read.

8. The device for accurately detecting the gas production performance of a reagent according to claim 7, characterized in that: The raw material tank comprises at least one, two or three of a first raw material tank (7), a second raw material tank (8) and a third raw material tank (9); preferably, the raw material tank is controlled to add raw materials and / or test agents to the reactor (3) by a display controller (18); further preferably, the addition of raw materials and / or test agents is controlled by a peristaltic pump provided on the raw material tank; And / or, the liquid level meter (13) is arranged at the top of the spherical bottle (16) provided with the liquid level meter; Further preferably, the liquid level meter (13) feeds back the detected liquid level signal to the display controller (18), controls the start and stop of the vacuum pump through the display controller, and reads the volume of gas extracted from the vacuum pump (17), thereby realizing accurate detection of the reagent gas production amount and / or gas production speed.

9. The device for accurately detecting the gas production performance of a reagent according to claim 7 or 8, characterized in that: The reactor (3) is provided with a stirrer (4) inside and a water bath (2) outside, and the middle part is fixed by a buckle (6); Preferably, a magnetic stirrer (1) is provided at the bottom of the water bath (2), and a first temperature sensor (5) is provided inside the water bath (2).

10. The device for accurately detecting the gas production performance of a reagent according to any one of claims 7 to 9, characterized in that: in, The gas generated by the reaction in the reactor (3) is condensed through a condenser (10) and collected in the spherical bottle (16) provided with a liquid level gauge; one end of the condenser (10) is connected to the pipeline of the cooling water collection tank (12), and the other end is connected to the pipeline of the cooling water storage tank (11); a second temperature sensor (24) is provided on the upper part of the condenser (10); the temperature of the cooling water in the cooling water storage tank (11) is preferably controlled so that the inside of the condenser (10) is cooled by the cooling water, and more preferably the cooling water temperature is displayed and controlled by a display controller (18).

11. The device for accurately detecting the gas production performance of a reagent according to any one of claims 7 to 10, characterized in that: The spherical bottle (16) provided with a liquid level meter is connected to the first spherical bottle (14); the first spherical bottle (14) contains a replacement fluid, and the replacement fluid is supplied to the spherical bottle (16) provided with a liquid level meter through the first spherical bottle (14); preferably, the first spherical bottle (14) is connected to the replacement fluid storage tank (15) via a second solenoid valve (19), and the second solenoid valve (19) is connected to a display controller (18).

12. The device for accurately detecting the gas production performance of a reagent according to any one of claims 6 to 10, characterized in that: The replacement fluid in the replacement fluid storage tank (15) is replenished into the first spherical bottle (14) and the spherical bottle (16) provided with a liquid level meter by using a second solenoid valve (19), wherein the second solenoid valve (19) is controlled by a display controller (18).

13. The device for accurately detecting the gas production performance of a reagent according to any one of claims 7 to 12, characterized in that: The first spherical bottle (14) is provided with an open mouth (20), so that the first spherical bottle (14) is in contact with the atmosphere.

14. The device for accurately detecting the gas production performance of a reagent according to any one of claims 7 to 13, characterized in that: The vacuum pump comprises a screw slide module (21), a metering injector (22) and a support plate (23).

15. The device for accurately detecting the gas production performance of a reagent according to claim 14, characterized in that: One end of the metering injector (22) is connected to the condenser (10) pipeline, and the other end is connected to the screw slide module (21), and the screw slide module (21) is connected to the display controller (18) circuit; a stepper motor is provided in the screw slide module (21), and the stepper motor is controlled by the display controller (18) according to the signal collected by the liquid level meter (13) to start and stop the vacuum pump (17).

16. The device for accurately detecting the gas production performance of a reagent according to claim 15, characterized in that: The gas extracted by the vacuum pump (17) enters the metering sample injector (22), and the display controller can rotate the screw slide module (21) of the vacuum pump (17) by driving the motor, and the volume of the gas extracted by the vacuum pump is calculated by the number of rotations.

17. The device for accurately detecting the gas production performance of a reagent according to claim 16, characterized in that: The calculation formula of the gas volume is V=C / 36*N, wherein V is the gas volume in mL, C is the number of times the screw slide module (21) of the vacuum pump (17) rotates 10°, and N is the amount of air pumped per one rotation of the vacuum pump (17).

18. The device for accurately detecting the gas production performance of a reagent according to any one of claims 7 to 17, characterized in that: The reading of the air pump (17) is calculated by a computer connected thereto and then inputted into a display controller (18) for display on the display controller (18).

19. The device for accurately detecting the gas production performance of a reagent according to any one of claims 7 to 18, characterized in that: When the display controller (18) controls the second solenoid valve (19) to add replacement fluid to the first spherical bottle or the spherical bottle provided with a liquid level gauge, or when the display controller (18) controls the start and stop of the vacuum pump (17), or when the display controller records the change in the liquid level height of the liquid level gauge (13), or when the display controller (18) controls the raw material tank, preferably by controlling the peristaltic pump to control the addition of reaction raw materials and / or test agents, signal transmission is achieved through wifi, Bluetooth or circuit connection.

20. A device for accurately detecting the gas production performance of a reagent according to any one of claims 7-19, the device comprising two or more reactors, wherein the two or more reactors are respectively connected to the condenser (10), so that the device can measure the gas production performance of two or more reagents. When detecting the gas production amount or gas production rate of one of the reagents, other solenoid valves arranged between other reactors and the condenser are in a closed state.

21. A method for accurately detecting the gas production performance of a reagent using the device according to any one of claims 7 to 19, characterized in that: It includes the following steps: (1) injecting the replacement fluid into a spherical bottle provided with a liquid level gauge so that the liquid level in the spherical bottle provided with the liquid level gauge is level with the liquid level gauge; (2) placing a reagent whose gas production performance is to be tested and a reaction raw material in a reactor, opening a first solenoid valve between the condenser and the reactor, and carrying out a reaction; (3) condensing the gas generated by the reaction and collecting it in the spherical bottle provided with a liquid level gauge; (4) closing the first solenoid valve between the condenser and the reactor, and using a vacuum pump to draw the gas in the spherical bottle provided with a liquid level gauge into the vacuum pump. When the liquid level in the spherical bottle provided with a liquid level gauge returns to the initial position, stopping the vacuuming, and calculating the gas volume; The display controller is used to control the start and stop of the vacuum pump and to record the change in the liquid level of the liquid level meter to achieve accurate detection of the gas production amount and / or gas production speed of the reagent.

22. A method for accurately detecting the gas production performance of a leavening agent using the device according to any one of claims 7 to 19, characterized in that: The steps include: (1) injecting the replacement fluid into a spherical bottle provided with a liquid level gauge so that the liquid level in the spherical bottle provided with the liquid level gauge is level with the liquid level gauge; (2) placing a reagent whose gas production performance is to be tested and a reaction raw material in a reactor, opening a first solenoid valve between the condenser and the reactor, and carrying out a reaction; (3) condensing the gas generated by the reaction and collecting it in the spherical bottle provided with a liquid level gauge; (4) closing the first solenoid valve between the condenser and the reactor, and using a vacuum pump to draw the gas in the spherical bottle provided with a liquid level gauge into the vacuum pump. When the liquid level in the spherical bottle provided with a liquid level gauge returns to the initial position, stopping the vacuuming, and calculating the gas volume; The display controller is used to control the start and stop of the vacuum pump and to record the change in the liquid level of the liquid level meter to achieve accurate detection of the gas production amount and / or gas production speed of the reagent.

23. The method according to claim 1-6 or claim 21 or claim 22, characterized in that: The calculation of the gas volume in step (4) also includes the blank air volume measured by using a vacuum pump (17) to pump air into the metering injector (22) of the vacuum pump (17) without adding the test agent. The gas production is calculated by subtracting the blank air volume from the gas volume using the following formula (1): Where: 101.3 is the atmospheric pressure under standard conditions, in kilopascals (kPa); 273 is the temperature under standard conditions, in degrees Kelvin (K), t is the reading of the temperature sensor (24) during the measurement, in degrees Celsius (°C); P1 is the corrected atmospheric pressure during measurement, in kilopascals (kPa); P2 is the corrected saturated vapor pressure of water at t°C, in kilopascals (kPa); m is the mass of the reagent, in g; V1 is the gas volume V1 obtained by calculating the number of revolutions of the screw slide module 21 after the reaction is completed by pumping the gas from the spherical bottle (16) equipped with a liquid level meter into the vacuum pump (17), in mL; V2 is the blank air volume of the spherical bottle equipped with a liquid level meter measured by the metering sampler 22 when the entire reaction system is evacuated by a vacuum pump when no test agent is added, and the unit is mL.

24. The method according to claim 1-6 or claim 21 or claim 22, characterized in that: The gas production of the test agent is calculated by the following calculation formula (2): Where: V----After the reaction is completed, the gas in the spherical bottle (16) equipped with a liquid level meter is pumped into the vacuum pump (17), and the gas volume V is calculated by the number of rotations of the screw slide module (21), in mL; m---Actual weighed mass of the reagent, in g.

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