Calcium carbide gas evolution measuring device

Abstract

The utility model provides a calcium carbide gas generation amount measuring device which comprises a gas generation tank, a feeding part, a gas inflation part and a detection part, a sealing cavity is formed in the gas generation tank, the feeding part, the gas inflation part and the detection part are connected with the gas generation tank, the feeding part is used for adding reaction raw materials into the sealing cavity, the gas inflation part is used for introducing flame-retardant gas into the sealing cavity, and the detection part is used for detecting the gas generation amount of calcium carbide. The detection part is used for acquiring environmental parameter information in the sealing cavity; the reaction raw materials comprise calcium carbide and reaction liquid, and the environmental parameter information comprises pressure information and temperature information. By arranging the feeding part, reaction raw materials can be fed into the sealing cavity. By arranging the detection part, the environmental parameters in the sealing cavity can be obtained, a reliable data basis is provided for calculating the gas evolution amount of calcium carbide, and the gas evolution amount of calcium carbide can be obtained more accurately and safely. The flame-retardant gas is introduced into the sealing cavity through the inflating part, so that air in the sealing cavity is replaced, acetylene is prevented from being mixed with the air, the explosion risk is reduced, and the operation safety is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of chemical technology, specifically relating to a calcium carbide gas generation measuring device. Background Technology

[0002] Calcium carbide, commonly known as calcium carbide, has the molecular formula CaC2 and a relative molecular weight of 64.10. It is an important chemical raw material and a primary raw material for the production of acetylene in the chlor-alkali industry. The chemical reaction equation for the reaction of calcium carbide with water to produce acetylene is as follows:

[0003] CaC2+2H2O→C2H2↑+Ca(OH)2+127.2kj / mol

[0004] The gas production of calcium carbide refers to the volume of acetylene gas produced by the reaction of a unit mass of calcium carbide with water, expressed in L / kg.

[0005] Existing gas production measurement devices typically include an acetylene generator and a metering device. The acetylene generator reacts calcium carbide with water to produce acetylene gas. The metering device usually consists of a bell jar and a water tank forming a metering chamber using a sealing fluid. The working pressure within the chamber is adjusted by a counterweight, and a constant pressure is achieved through a spool wheel and a compensating hammer in the balance wheel. The sealing fluid is often a saturated NaCl solution.

[0006] During the testing process, the pressure zeroing point of the bell-shaped float needs to be manually adjusted, and the displacement value of the bell-shaped float needs to be manually read. Zeroing the pressure of the bell-shaped float involves manually observing the reading of the U-tube manometer and manually adjusting the position of the bell-shaped float until the U-tube manometer reading is zero. Errors in the U-tube manometer reading and errors in manually adjusting the position of the bell-shaped float will affect the accuracy of the test. Simultaneously, the ambient temperature affects the temperature of the saturated NaCl solution, causing changes in the solubility of acetylene in the saturated NaCl solution, which has a significant impact on the test results and also affects the accuracy of the test. Utility Model Content

[0007] Therefore, the technical problem to be solved by this application is to provide a calcium carbide gas emission measuring device that can increase the measurement accuracy of calcium carbide gas emission.

[0008] To address the aforementioned problems, a first aspect of this application provides a calcium carbide gas generation measurement device, comprising a gas generation tank, a feeding section, a gas filling section, and a detection section. The gas generation tank has a sealed cavity. The feeding section, the gas filling section, and the detection section are respectively connected to the gas generation tank. The feeding section is connected to the outer wall of the gas generation tank. The feeding section is used to add reaction materials into the sealed cavity. The gas filling section is used to introduce flame-retardant gas into the sealed cavity. The detection section is used to acquire environmental parameter information within the sealed cavity. The reaction materials include calcium carbide and a reaction liquid, and the environmental parameter information includes pressure information and temperature information.

[0009] Optionally, the detection unit includes a temperature measuring element disposed on the gas generator and extending into the sealed cavity to obtain the temperature information within the sealed cavity; the detection unit includes a pressure measuring element and a pressure measuring pipeline disposed on the pressure measuring pipeline and connected to the sealed cavity to obtain the pressure information within the sealed cavity; a pressure control valve is provided on the pressure measuring pipeline.

[0010] Optionally, the calcium carbide gas generation measuring device includes a slag discharge pipe, which is located at the bottom of the gas generator and connected to the sealed cavity, and a slag discharge valve is provided on the slag discharge pipe.

[0011] Optionally, the feeding section includes a first feeding unit, which includes a liquid pipeline connected to the sealed cavity and the reaction liquid source to inject the reaction liquid into the sealed cavity. The first feeding unit also includes a first control valve and a flow meter disposed on the liquid pipeline.

[0012] Optionally, the feeding section includes a second feeding unit disposed on the top of the gas generator. The second feeding unit includes a feeding pipe, a sealing element, and a first driving unit. The feeding pipe includes a first end and a second end. The first end is connected to the external space of the gas generator, and the second end is connected to the sealing cavity. The sealing element is rotatably disposed inside the feeding pipe and located between the first end and the second end to isolate the first end from the second end. The sealing element includes a placement position for placing calcium carbide. The rotation path of the sealing element includes a first position toward the first end and a second position toward the second end. The first driving unit is connected to the sealing element to drive the sealing element to switch between the first position and the second position.

[0013] Optionally, the feeding section includes a conveying pipe, one end of which is connected to the feeding pipe, and the other end extends towards the center of the sealing cavity in the horizontal direction. A screw is provided inside the conveying pipe, and the screw is coaxially arranged with the conveying pipe. The thread crest of the screw abuts against the inner wall of the conveying pipe. The feeding section includes a second driving unit, which is connected to the screw to drive the screw to rotate inside the conveying pipe.

[0014] Optionally, the inflation part includes an air inlet pipe, which is connected to the sealing cavity and the flame-retardant gas source respectively, and a second control valve is provided on the air inlet pipe; the inflation part includes an exhaust pipe, the calcium carbide gas generation measuring device includes a processing tank, the exhaust pipe is connected to the sealing cavity and the processing tank respectively, and a third control valve is provided on the exhaust pipe;

[0015] Optionally, the calcium carbide gas generation measuring device further includes a control unit, wherein the temperature measuring element, the pressure measuring element, the slag discharge valve, the first control valve, the flow meter, the first drive unit, the second control valve, and the third control valve are respectively connected to the control unit; the calcium carbide gas generation measuring device includes a cabinet, wherein the gas generating tank, the feeding unit, the gas filling unit, and the detection unit are disposed in the cabinet, and the control unit includes a display, which is disposed on the outer wall of the cabinet.

[0016] Beneficial effects

[0017] The calcium carbide gas generation measuring device provided in this embodiment of the invention provides a sealed space for the chemical reaction between calcium carbide and the reaction liquid by setting up a gas generating tank and a sealed cavity inside the gas generating tank. A feeding section allows the reaction raw materials to be added into the sealed cavity. A detection section allows the acquisition of environmental parameters within the sealed cavity, providing a reliable data basis for calculating the calcium carbide gas generation, thus enabling a more accurate determination of the calcium carbide gas generation. An inflation section allows the introduction of flame-retardant gas into the sealed cavity, thereby displacing the air inside the sealed cavity and preventing the formation of an explosive mixture of acetylene and air. This reduces the explosion risk during operation of the calcium carbide gas generation measuring device and ensures the safety of the device's operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the working principle of the calcium carbide gas generation measuring device according to an embodiment of this application.

[0019] Figure 2 This is a first-view structural schematic diagram of the calcium carbide gas generation measuring device according to an embodiment of this application.

[0020] Figure 3 This is a second-view structural schematic diagram of the calcium carbide gas generation measurement device according to an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the gas generator and the feeding section according to an embodiment of this application;

[0022] Figure 5 This is a cross-sectional view of the feeding section according to an embodiment of this application;

[0023] Figure 6 This is a logic diagram of the calcium carbide gas generation measurement method according to an embodiment of this application.

[0024] The reference numerals in the attached figures are as follows:

[0025] 1. Cabinet; 11. Gas cylinder;

[0026] 21. Temperature measuring element; 22. Pressure measuring element; 23. Pressure control valve;

[0027] 31. Slag discharge pipe; 32. Slag discharge valve;

[0028] 41. Liquid piping; 42. First control valve; 43. Flow meter;

[0029] 51. Intake pipe; 52. Second control valve;

[0030] 61. Exhaust pipe; 62. Third control valve; 63. Processing tank;

[0031] 7. Control unit; 71. Electrical control unit; 72. Pneumatic control unit; 73. Display;

[0032] 8. Air compressor hose;

[0033] 91. Feeding pipe; 92. Seal; 93. First drive unit. Detailed Implementation

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0038] See also Figures 1 to 5 As shown, according to a first aspect of an embodiment of this application, a calcium carbide gas generation measuring device is provided, including a gas generation tank 11, a feeding section, a gas filling section, and a detection section. A sealed cavity is provided inside the gas generation tank 11. The feeding section, gas filling section, and detection section are respectively connected to the gas generation tank 11. The feeding section is connected to the outer wall of the gas generation tank 11 and is used to add reaction raw materials into the sealed cavity. The gas filling section is used to introduce flame-retardant gas into the sealed cavity. The detection section is used to acquire environmental parameter information within the sealed cavity. The reaction raw materials include calcium carbide and a reaction liquid, and the environmental parameter information includes pressure information and temperature information.

[0039] By setting up a gas generator 11 and a sealed cavity within it, a closed space is provided for the chemical reaction between calcium carbide and the reaction liquid. A feeding section allows for the introduction of reaction materials into the sealed cavity. A detection section enables the acquisition of environmental parameters within the sealed cavity, providing a reliable data basis for calculating the calcium carbide gas generation, thus allowing for a more accurate determination of the calcium carbide gas generation. An inflation section allows for the introduction of flame-retardant gas into the sealed cavity, thereby displacing the air inside and preventing the formation of an explosive mixture of acetylene and air. This reduces the explosion risk during operation of the calcium carbide gas generation measurement device and ensures operational safety.

[0040] The calcium carbide gas generation measuring device in this embodiment eliminates the need for a metering device by setting a feeding section, a gas filling section, and a detection section on the gas generating tank 11. This reduces manual operation steps, avoids human errors caused by manually adjusting the pressure of the bell buoy, observing the U-shaped pressure gauge, and reading the displacement scale of the bell buoy, avoids errors caused by changes in the solubility of acetylene in saturated brine, and avoids the tedious calculation process of deducting the saturated vapor pressure of saturated brine. This increases the measurement accuracy of calcium carbide gas generation.

[0041] The feeding section, gas filling section, and detection section of the calcium carbide gas generation measurement device are all automated equipment, which can work together automatically to realize an automated measurement process. The steps of gas filling, feeding, detection, and gas generation calculation are all automatically controlled, without frequent manual intervention, which greatly shortens the measurement time.

[0042] Specifically, the calcium carbide gas generation measuring device also includes a control unit 7, which is connected to the feeding unit, the gas filling unit and the detection unit respectively, thereby controlling the operation of the feeding unit, the gas filling unit and the detection unit to achieve coordinated operation.

[0043] It is understandable that the feeding section, the gas filling section, and the detection section can be controlled independently or operated manually. In this embodiment, whether the feeding section, the gas filling section, and the detection section are controlled automatically and collaboratively, controlled independently, or operated manually, compared with traditional calcium carbide gas generation measurement devices, human error is reduced and the measurement accuracy of calcium carbide gas generation is increased.

[0044] Among them, the gas generator 11 can be roughly a hollow cylindrical structure, and the sealed cavity is the hollow part.

[0045] The feeding section, the gas filling section, and the detection section are fixedly connected to the gas generating tank 11.

[0046] The reaction solution can be water.

[0047] The detection unit includes a temperature measuring element 21, which is mounted on the gas generator 11 and extends into the sealed cavity to obtain temperature information within the sealed cavity.

[0048] The reaction between calcium carbide and water is exothermic, and the temperature inside the sealed cavity changes as the reaction proceeds. By installing a thermometer and inserting the sensing element 21 into the sealed cavity to obtain temperature information, the temperature inside the sealed cavity can be acquired in real time and accurately. By obtaining accurate temperature information from the sealed cavity, combined with other data such as pressure information, the amount of acetylene gas produced in the reaction can be calculated more precisely, thus yielding a more accurate amount of calcium carbide gas produced and improving measurement accuracy.

[0049] Among them, temperature measuring element 21 is a temperature sensor.

[0050] Specifically, the detection end of the temperature sensor extends through the wall of the gas generator 11 into the sealed cavity.

[0051] There are multiple temperature measuring elements 21, which are evenly arranged along the circumference of the gas generator 11.

[0052] By setting multiple temperature measuring elements 21 and arranging them evenly around the gas generator 11, temperature information at different locations within the sealed cavity can be obtained, avoiding measurement errors caused by local temperature differences. This allows for more comprehensive and accurate acquisition of temperature information within the sealed cavity, thereby providing a more accurate estimate of the calcium carbide gas generation rate.

[0053] Among them, the multiple temperature measuring elements 21 are in the same vertical position, that is, the multiple temperature measuring elements 21 are evenly arranged along the horizontal circumference of the gas generating tank 11.

[0054] The temperature information is the average value of the temperature measured by each temperature measuring element 21.

[0055] The detection unit includes a pressure measuring element 22 and a pressure measuring pipeline. The pressure measuring element 22 is installed on the pressure measuring pipeline, and the pressure measuring pipeline is connected to the sealing cavity to obtain the pressure information inside the sealing cavity through the pressure measuring element 22.

[0056] By setting up pressure measuring pipelines and pressure measuring components 22, the pressure information inside the sealed cavity can be accurately obtained. Combined with other data such as temperature information, the amount of acetylene gas generated by the reaction can be calculated more accurately, thereby obtaining a more accurate amount of calcium carbide gas produced and improving the accuracy of the measurement.

[0057] Among them, pressure measuring element 22 is a pressure sensor.

[0058] The pressure measuring element 22 is located at one end of the pressure measuring pipeline, and the other end of the pressure measuring pipeline is connected to the gas generating tank 11 and communicates with the sealing cavity. The gas in the sealing cavity can reach the pressure measuring element 22 through the pressure measuring pipeline, thereby enabling the pressure measuring element 22 to obtain the pressure information in the sealing cavity.

[0059] A pressure control valve 23 is installed on the pressure testing pipeline, which can control the opening and closing of the pressure testing pipeline.

[0060] The diameter and length of the pressure measuring pipeline should be minimized to reduce its volume, thereby reducing errors in the volume data when calculating the calcium carbide gas generation. Alternatively, the volume of the pressure measuring pipeline can be included in the volume of the gas generating tank 11 to avoid errors in the volume data when calculating the calcium carbide gas generation.

[0061] The calcium carbide gas generation measuring device includes a slag discharge pipe 31, which is located at the bottom of the gas generating tank 11 and connected to the sealing cavity. A slag discharge valve 32 is installed on the slag discharge pipe 31.

[0062] By setting up the slag discharge pipe 31 and the slag discharge valve 32, the slag and water can be discharged conveniently and quickly, keeping the inside of the gas generator 11 clean, ensuring the consistency of the reaction environment during each measurement, and avoiding measurement errors caused by slag and water residue.

[0063] The slag discharge pipe 31 is a straight pipe and is installed vertically. The top end of the slag discharge pipe 31 is connected to the bottom center of the gas generator 11 and is connected to the sealing cavity. A container can be installed below the bottom end of the slag discharge pipe 31 to collect the discharged slag and water.

[0064] The slag discharge valve 32 is located in the middle of the slag discharge pipe 31.

[0065] Specifically, the volume of the portion above the slag discharge valve 32 in the slag discharge pipe 31 is included in the volume of the gas generator 11, thereby avoiding errors in the volume data when calculating the gas generation of calcium carbide.

[0066] The feeding unit includes a first feeding unit, which includes a liquid pipeline 41. The liquid pipeline 41 is connected to the sealed cavity and the reaction liquid source respectively to inject the reaction liquid into the sealed cavity. The first feeding unit also includes a first control valve 42 and a flow meter 43 installed on the liquid pipeline 41.

[0067] The first feeding unit allows for accurate injection of the reaction liquid into the sealed cavity. A liquid pipeline 41 provides a delivery channel for the reaction liquid, and a first control valve 42 controls the opening and closing of the liquid pipeline 41. A flow meter 43 accurately measures the volume of reaction liquid injected into the sealed cavity, providing a reliable data basis for calculating the gas generation of calcium carbide.

[0068] The reaction liquid source can be a device for storing the reaction liquid inside the calcium carbide gas emission measuring device, or it can be a device outside the calcium carbide gas emission measuring device.

[0069] In this embodiment, the reaction liquid source is a container inside the calcium carbide gas generation measuring device for storing the reaction liquid and a water pump for pumping the reaction liquid.

[0070] Specifically, the reaction liquid is water. The calcium carbide gas generation measuring device includes a water storage tank, a water pump connected to a water pipe, and a liquid pipeline 41. The water pump draws water from the water storage tank into the liquid pipeline 41, and then into the sealed cavity, allowing the water to react with the calcium carbide. In other words, the water storage tank, the water in the tank, the water pipe, and the water pump together form the reaction liquid source.

[0071] Specifically, the volume of the portion of the liquid pipeline 41 between the outlet and the first control valve 42 is included in the volume of the gas generator 11, thereby avoiding errors in the volume data when calculating the gas generation of calcium carbide.

[0072] The feeding section includes a second feeding unit disposed on the top of the gas generator 11. The second feeding unit includes a feeding pipe 91, a sealing element 92, and a first driving unit 93. The feeding pipe 91 includes a first end and a second end. The first end is connected to the external space of the gas generator 11, and the second end is connected to the sealing cavity. The sealing element 92 is rotatably disposed inside the feeding pipe 91 and is located between the first end and the second end to isolate the first end and the second end. The sealing element 92 includes a placement position for placing calcium carbide. The rotation path of the sealing element 92 includes a first position toward the first end and a second position toward the second end. The first driving unit 93 is connected to the sealing element 92 to drive the sealing element 92 to switch between the first position and the second position.

[0073] By providing a feeding pipe 91, a channel is provided for calcium carbide to enter the sealed cavity. By installing a seal 92 inside the feeding pipe 91, the first and second ends of the feeding pipe 91 are isolated, isolating the sealed cavity of the gas generator 11 from the outside world and effectively preventing flammable and explosive gases such as acetylene from escaping from the gas generator 11. By setting a first drive unit 93 to switch the seal 92 between a first position and a second position, the calcium carbide placed in the position can be moved from the first position to the second position, thereby entering the sealed cavity and realizing feeding.

[0074] The feeding pipe 91 includes a receiving section located in the middle. An inlet section and a outlet section are located on either side of the receiving section. The inlet section is located on the side of the receiving section furthest from the sealing cavity, and the outlet section is located on the side of the receiving section closest to the sealing cavity. The first end of the inlet section is the end furthest from the receiving section, and the second end of the outlet section is the end furthest from the receiving section. A sealing element 92 is disposed within the receiving section. The diameter of the receiving section is larger than the diameters of the inlet section and the outlet section, so that the sealing element 92 can isolate the inlet section from the outlet section. The diameter of the sealing element 92 is matched to the diameter of the receiving section, meaning that the diameter of the sealing element 92 is larger than the diameters of the inlet section and the outlet section. This ensures that the sealing element 92 can always seal the internal space of the feeding pipe 91 during rotation, always isolating the inlet section from the outlet section, thus blocking the connection between the inlet section and the outlet section and preventing nitrogen leakage.

[0075] The inner wall of the receiving section is curved, and the seal 92 is roughly spherical. The shape and size of the receiving section are adapted to the shape and size of the seal 92.

[0076] The placement area features a groove, within which calcium carbide is placed, facilitating its movement. The groove's dimensions are designed to meet specific requirements, preventing the first and second ends from connecting during the rotation of the seal 92.

[0077] The feeding section includes a conveying pipe, one end of which is connected to the feeding pipe 91, and the other end extends towards the middle of the sealing cavity in the horizontal direction. A screw is installed inside the conveying pipe, and the screw is coaxially arranged with the conveying pipe. The thread crest of the screw abuts against the inner wall of the conveying pipe. The feeding section includes a second drive unit, which is connected to the screw to drive the screw to rotate inside the conveying pipe.

[0078] By setting up a conveying pipe with a screw inside, driven by a second drive unit, the screw rotates within the pipe, pushing the calcium carbide inside towards the center of the sealed cavity. This ensures the calcium carbide falls into the center of the sealed cavity, centered on the reaction, resulting in more accurate temperature and pressure readings from the temperature and pressure measuring elements 21 and 22, reducing errors. By having the screw's thread crest abut against the inner wall of the conveying pipe, the thread continuously stirs and pushes the material during rotation, allowing it to move smoothly within the pipe and reducing the possibility of accumulation and blockage. This ensures the continuity and stability of the feeding process, preventing material blockage from affecting measurement progress and results.

[0079] The conveying pipe is a straight pipe, with one end connected to the feeding pipe 91, serving as the inlet for calcium carbide to enter. The other end of the conveying pipe extends horizontally towards the center of the sealed cavity, ensuring accurate delivery of calcium carbide to the center of the sealed cavity. The screw is housed within the hollow section of the conveying pipe, which provides space for its installation and rotation, while also guiding and constraining the material to prevent it from scattering during transport.

[0080] The screw is located inside the conveying pipe and is coaxially arranged with the pipe. The thread crest of the screw abuts against the inner wall of the conveying pipe, so that when the screw rotates, it can push the material along the axial direction of the conveying pipe through the pushing action of the thread.

[0081] The second drive unit is the power source for the screw feeder. It is connected to the screw and provides rotational power to the screw, enabling it to rotate stably inside the conveying pipe.

[0082] Specifically, the second drive unit is a motor, which can be installed outside the gas generating tank 11. The second drive unit is connected to the screw via a transmission mechanism, such as a belt, to drive the screw to rotate. Specifically, the second drive unit is installed on the outer wall of the gas generating tank 11.

[0083] More specifically, pulleys are mounted on the output shaft and one end of the screw of the second drive unit, and the two pulleys are connected by a belt. When the second drive unit operates, it drives the driving pulley to rotate, and the driving pulley drives the driven pulley to rotate through the friction of the belt, thereby driving the screw.

[0084] The inflation section includes an air inlet pipe 51, which is connected to the sealing cavity and the nitrogen source respectively. A second control valve 52 is provided on the air inlet pipe 51.

[0085] An inlet pipe 51 provides a flow channel for nitrogen. A second control valve 52 on the inlet pipe 51 allows for the control of the nitrogen flow path. Introducing nitrogen into the sealed cavity through the inlet pipe 51 effectively displaces the air before measurement, creating an oxygen-free environment. This prevents the subsequent reaction of calcium carbide and water, which produces acetylene, from mixing with air to form an explosive gas, thus reducing the risk of explosion and ensuring the safety of operators and equipment. Nitrogen is stable and does not readily react chemically with calcium carbide, water, or reaction products. Filling the sealed cavity with nitrogen eliminates interference from other air components in the measurement process. The second control valve 52 facilitates precise control of the nitrogen flow rate and timing. Before measurement, the nitrogen flow rate can be accurately controlled based on the volume of the sealed cavity and actual requirements to ensure sufficient air replacement.

[0086] Specifically, the volume of the portion of the intake pipe 51 between the outlet and the second control valve 52 is included in the volume of the gas generator 11, thereby avoiding errors in the volume data when calculating the gas generation of calcium carbide.

[0087] The inflation section includes an exhaust pipe 61, and the calcium carbide gas generation measuring device includes a processing tank 63. The exhaust pipe 61 is connected to the sealing cavity and the processing tank 63 respectively, and a third control valve 62 is provided on the exhaust pipe 61.

[0088] By installing the exhaust pipe 61, the acetylene gas in the sealed cavity can be discharged to the treatment tank 63, preventing the accumulation of acetylene gas in the device, reducing the risk of explosion, and ensuring the safety of operators and equipment. The treatment tank 63 dilutes and flame-retards the acetylene gas before discharging it.

[0089] The calcium carbide gas generation measuring device also includes a control unit 7, a temperature measuring element 21, a pressure measuring element 22, a slag discharge valve 32, a first control valve 42, a flow meter 43, a first drive unit 93, a second control valve 52 and a third control valve 62, which are respectively connected to the control unit 7.

[0090] By setting up a control unit 7, the automated operation of the calcium carbide gas emission measurement device is realized, achieving automated measurement. The control unit 7 can coordinate the operation of various components. When starting the measurement, the control unit 7 can sequentially control the second control valve 52 to open according to a preset program, introducing nitrogen gas into the sealed cavity. Then, it controls the first control valve 42 to open, allowing the reaction liquid to be injected according to the set amount; then, it controls the first drive unit 93 to drive the sealing element 92 to rotate, adding calcium carbide. During the reaction, the data of the temperature measuring element 21 and the pressure measuring element 22 are collected in real time. After the reaction is completed, the third control valve 62 is controlled to open the exhaust and slag discharge valve 32 to discharge slag. The entire process does not require frequent manual intervention, improving measurement efficiency. When using a traditional calcium carbide gas emission measurement device, testing the same sample requires three consecutive operations. The first result is disregarded, and the gas emission is calculated separately for the second and third results, i.e., "one blank and two parallel" testing, which usually takes 35 to 45 minutes, which is time-consuming and inefficient. The calcium carbide gas emission measurement device in this embodiment reduces manual intervention through automated control. Compared with traditional calcium carbide gas emission measurement devices, it avoids the tedious work of manually calculating the gas emission, provides accurate data for a single test sample, improves testing efficiency, and shortens the testing time to 10-14 minutes, greatly improving measurement efficiency.

[0091] Traditional calcium carbide gas emission measurement devices require manual intervention in processes such as feeding, testing, and reading. However, the testing environment contains flammable, explosive, and toxic gases such as acetylene, hydrogen sulfide, and phosphine, posing an explosion hazard and compromising the safety and health of operators. The calcium carbide gas emission measurement device in this embodiment, through automated control, reduces manual intervention and prevents operators from inhaling toxic gases, thus ensuring their safety and health.

[0092] The control unit 7 precisely regulates each component, ensuring the stability and consistency of the measurement process. Based on data from the flow meter 43, the control unit 7 precisely controls the injection volume of the reaction liquid, guaranteeing identical reaction conditions for each measurement. Using data from the temperature sensor 21 and pressure sensor 22, combined with an algorithm, the gas output is accurately calculated, avoiding errors from manual calculations and effectively improving measurement accuracy.

[0093] When the detection unit detects abnormal conditions such as over-temperature or over-pressure, the control unit 7 controls the third control valve 62 and the slag discharge valve 32 to open, automatically emptying and discharging slag, and entering a safe mode. When the system power supply or compressed air is abnormal, the system automatically puts the calcium carbide gas generation measuring device into a safe mode, and the third control valve 62 and the slag discharge valve 32 automatically open, automatically emptying and discharging slag, ensuring the safety of the system.

[0094] Among them, the slag discharge valve 32 can be a spring-loaded safety valve, which automatically opens by the elastic force of the spring when there is overpressure.

[0095] The control unit 7 includes an electrical control unit 71, which can be a PLC controller. The slag discharge valve 32, the first control valve 42, the second control valve 52, and the third control valve 62 can be electrically controlled valves. The slag discharge valve 32, the first control valve 42, the second control valve 52, and the third control valve 62 are respectively connected to the control unit 7 via cables or wirelessly.

[0096] The control unit 7 may include a pneumatic control unit 72, and the slag discharge valve 32, the first control valve 42, the second control valve 52, and the third control valve 62 may be pneumatic valves. The slag discharge valve 32, the first control valve 42, the second control valve 52, and the third control valve 62 are each connected to the pneumatic control unit 72 via air pipes. The pneumatic control unit 72 is connected to an electrical control unit 71, and the electrical control unit 71 controls the operation of the pneumatic control unit 72, thereby controlling the opening and closing of each pneumatic valve. The pneumatic control unit 72 may be connected to an external air source via an air compressor pipe 8. The calcium carbide gas generation measuring device may also include an air compressor, and the pneumatic control unit 72 may be connected to the air compressor within the calcium carbide gas generation measuring device via the air compressor pipe 8.

[0097] The electronic control unit 71 can be connected to the temperature measuring element 21, pressure measuring element 22, flow meter 43 and first drive unit 93 via cables, or it can communicate with the temperature measuring element 21, pressure measuring element 22, flow meter 43 and first drive unit 93 via wireless connection.

[0098] It should be noted that controlling the switching of electrically controlled valves via the electronic control unit 71, and obtaining corresponding parameter information from the temperature measuring element 21, pressure measuring element 22, and flow meter 43, are all conventional methods in the art. Controlling the operation of the first drive unit 93 via the electronic control unit 71, i.e., controlling the motor operation, is also a conventional method in the art. The specific model and composition structure of the PLC controller are all conventional technical solutions in the art and can be selected and designed according to actual needs. The connection method, circuit structure, signal transmission path, and specific working principle between the PLC controller and each electric valve are also conventional methods in the art and will not be elaborated here. Controlling the pneumatic control unit 72 via the electronic control unit 71, and thus controlling the switching of each pneumatic valve, is also a conventional method in the art and will not be elaborated here.

[0099] The calcium carbide gas generation measuring device includes a cabinet 1, a gas generation tank 11, a feeding section, a gas filling section and a detection section, which are installed inside the cabinet 1. The control section 7 includes a display 73, which is installed on the outer wall of the cabinet 1.

[0100] By integrating the gas generator 11, feeding section, gas filling section, and detection section into the cabinet 1, the entire measuring device has a compact structure. Operators do not need to move between multiple scattered components during measurement operations, facilitating centralized operation and management. The display 73 is prominently positioned on the outer wall of the cabinet 1, allowing operators to view various parameters during the measurement process in real time, such as temperature, pressure, and reaction liquid flow rate, thus understanding the device's operating status and improving operational efficiency.

[0101] Cabinet 1 protects the internal gas generating tank 11, feeding section, inflation section, and testing section, reducing the impact of external factors on the equipment. Cabinet 1 prevents dust, moisture, and other impurities from entering the device, extending its service life. The cabinet also makes the measuring device more organized and occupies less space, which is beneficial for space planning and tidiness in the laboratory or work area.

[0102] The display 73 is embedded in the top outer wall of the cabinet 1.

[0103] like Figure 6 As shown, in a second aspect of this embodiment, a method for measuring the gas emission of calcium carbide is provided, wherein the gas emission of calcium carbide is measured by means of the calcium carbide gas emission measuring device described above.

[0104] The methods include:

[0105] Step 101: Control the inflation section to introduce flame-retardant gas into the sealed cavity of the gas generator 11.

[0106] By introducing flame-retardant gas into the sealed cavity of the gas generator 11, the air inside the cavity can be replaced, preventing the acetylene produced later from mixing with air to form an explosive mixture. This greatly reduces the possibility of an explosion and protects the safety of operators and equipment. Furthermore, it creates an oxygen-free and stable environment for subsequent reactions, reducing interference from oxygen and other impurities in the reaction between calcium carbide and water, ensuring the reaction proceeds under purer conditions, and contributing to improved measurement accuracy.

[0107] In this step, the second control valve 52 on the inlet pipe 51 connected to the nitrogen source is opened, allowing nitrogen to continuously flow into the sealed cavity of the gas generator 11. Utilizing the chemically stable, non-flammable, and non-combustible properties of nitrogen, the air inside the sealed cavity is displaced.

[0108] Step 102: Control the first feeding unit to inject the reaction liquid into the sealed cavity.

[0109] It can automatically inject the reaction solution and precisely control the amount of reaction solution injected, providing stable initial conditions for the reaction of calcium carbide and water.

[0110] In this step, the first control valve 42 on the liquid pipeline 41 is opened, allowing the reaction liquid to be injected from the reaction liquid source into the sealed cavity via the liquid pipeline 41. When the reaction liquid source is a component inside the calcium carbide gas generation measuring device, the water pump on the reaction liquid source is operated to pump the reaction liquid into the liquid pipeline 41. When the reaction liquid source is a component outside the calcium carbide gas generation measuring device, the first control valve 42 is opened, allowing the reaction liquid to be injected from the reaction liquid source into the sealed cavity via the liquid pipeline 41.

[0111] In this step, the control unit 7 receives the flow information monitored by the flow meter 43, and then controls the opening and closing of the first control valve 42 based on the flow information, so that the reaction liquid is injected into the sealed cavity according to the set volume.

[0112] Step 103: Control the second feeding unit to add calcium carbide into the sealed cavity.

[0113] It can automatically add calcium carbide and precisely control the quality of the added calcium carbide, avoiding the impact of inaccurate feeding amount on the gas generation measurement results and improving the reliability of the measurement data.

[0114] In this step, the calcium carbide sample is first placed on the placement position of the sealing element 92 of the second feeding unit. The sealing element 92 is driven to rotate by the first driving unit 93, so that it rotates from the first position facing the external space of the gas generating tank 11 to the second position facing the sealing cavity, so that the calcium carbide falls into the sealing cavity. This ensures that the calcium carbide is in a relatively sealed environment during the addition process, eliminating the risk of gas leakage in the sealing cavity, and at the same time preventing external impurities from mixing into the gas generating tank 11 and affecting the measurement.

[0115] Specifically, in this embodiment, 50 g ± 0.1 g of calcium carbide sample can be added.

[0116] Step 104: Obtain environmental parameter information inside the sealed cavity.

[0117] Obtaining environmental parameter information lays the foundation for accurate calculation of gas output. Real-time monitoring of environmental parameters also allows us to understand the progress of the reaction, helping us to grasp the entire measurement process.

[0118] In this step, the temperature measuring element 21 can accurately obtain the temperature information inside the sealed cavity, and the pressure measuring element 22 can accurately obtain the pressure information inside the sealed cavity.

[0119] Step 105: Obtain the gas generation of calcium carbide based on environmental parameter information.

[0120] By obtaining temperature and pressure information, and combining it with information such as the volume of the sealed cavity, the volume of the flame-retardant gas introduced, and the volume of the injected reaction liquid, the amount of gas generated by calcium carbide can be calculated.

[0121] In this step, the initial nitrogen volume is first calculated based on the initial temperature, initial pressure, and the volume of nitrogen introduced. Then, the total amount of gas produced after the reaction is calculated based on the highest temperature, highest pressure, sealed cavity volume, and injected reaction liquid volume. The acetylene volume is obtained by subtracting the initial nitrogen volume from the total amount of gas produced after the reaction. Finally, the gas production per unit mass of calcium carbide is calculated based on the mass of calcium carbide added.

[0122] Step 106: Control the third control valve 62 to open and release the gas in the sealed cavity.

[0123] Acetylene is a flammable and explosive gas. Promptly venting it after measurement prevents its accumulation in the sealed cavity, reducing the risk of explosion. Simultaneously, venting the gas restores the pressure within the sealed cavity to normal, facilitating subsequent slag removal and the reuse of the equipment.

[0124] In this step, the third control valve 62 on the exhaust pipe 61, which is connected to the sealed cavity and the treatment tank 63, is opened, so that the gas in the sealed cavity is discharged into the treatment tank 63 for processing.

[0125] Step 107: Control the slag discharge valve 32 to open and discharge the slag and water in the sealed cavity.

[0126] The reaction of calcium carbide with water produces calcium hydroxide, which forms sludge. If not drained promptly, this sludge can affect the reaction process during subsequent measurements, such as clogging pipes and compromising the accuracy of temperature and pressure measurements. Furthermore, the sludge may corrode internal components of the equipment, shortening its lifespan.

[0127] In this step, the slag discharge valve 32 is opened to allow the slag water to be discharged through the slag discharge pipe 31.

[0128] Step 105 above includes:

[0129] Step 1051: When the gas-injection section is controlling the gas-injection section to introduce flame-retardant gas into the sealed cavity of the gas generator 11, obtain the volume of the introduced flame-retardant gas.

[0130] In this step, the volume of nitrogen gas introduced is recorded, providing a data basis for subsequent calculation of the initial nitrogen volume in the sealed cavity based on the ideal gas law. The initial nitrogen volume can also be understood as the amount of nitrogen gas in its initial state.

[0131] Step 1052: When controlling the first feeding unit to inject the reaction liquid into the sealed cavity, obtain the volume of the injected reaction liquid.

[0132] In this step, accurately obtaining the volume of injected water can provide data support for subsequent calculations of the total gas volume, which helps to accurately measure the gas generation of calcium carbide.

[0133] Step 1053: When the second feeding unit adds calcium carbide into the sealed cavity, the temperature measuring element 21 is controlled to obtain the initial temperature information in the sealed cavity, and the pressure measuring element 22 is controlled to obtain the initial pressure information in the sealed cavity.

[0134] In this step, the initial temperature and pressure information are obtained. Combined with the volume of the sealed cavity and the volume of the flame-retardant gas introduced, the initial amount of nitrogen in the sealed cavity can be calculated based on the ideal gas law, providing a benchmark for subsequent calculations.

[0135] Step 1054: During the reaction of calcium carbide with the reaction solution, the temperature measuring element 21 is controlled to obtain the highest temperature information in the sealed cavity, and the pressure measuring element 22 is controlled to obtain the highest pressure information in the sealed cavity.

[0136] In this step, the reaction of calcium carbide with water releases heat, increasing the temperature and pressure within the sealed cavity. By obtaining the highest temperature and pressure information, and using the ideal gas law, combined with the volume of the sealed cavity and the remaining space after water injection, the total amount of gas after the reaction can be calculated. This provides crucial data for calculating the amount of acetylene produced in the reaction. The total amount of gas after the reaction can also be understood as the total amount of gas within the sealed cavity after the reaction.

[0137] Step 1055: Obtain the initial nitrogen quantity based on the volume of the sealed cavity, the volume of the flame-retardant gas introduced, the initial temperature information, and the initial pressure information.

[0138] In this step, using the ideal gas law, the amount of nitrogen in the sealed cavity under the initial conditions can be calculated from the known volume of the sealed cavity, the volume of nitrogen introduced, the initial temperature, and the initial pressure. This determines the baseline amount of gas in the sealed cavity before the reaction.

[0139] Step 1056: Based on the volume of the sealed cavity, the volume of the injected reaction liquid, the information on the highest temperature, and the information on the highest pressure, obtain the total amount of gas after the reaction.

[0140] In this step, since the gas in the sealed cavity after the reaction consists of the initial nitrogen and acetylene generated by the reaction of calcium carbide and water, the total amount of gas in the sealed cavity after the reaction can be calculated by substituting the volume of the sealed cavity, the remaining volume after water injection, the highest temperature, and the highest pressure into the formula according to the ideal gas law.

[0141] Step 1057: Obtain the acetylene quantity based on the initial nitrogen quantity and total gas quantity.

[0142] The total amount of gas after the reaction includes the initial amount of nitrogen and the amount of acetylene produced. The amount of acetylene produced by the reaction of calcium carbide and water can be obtained by subtracting the initial amount of nitrogen from the total amount of gas after the reaction.

[0143] Step 1058: Obtain the gas generation of calcium carbide based on the amount of acetylene.

[0144] According to the chemical equation for the reaction of calcium carbide with water to produce acetylene, the molar ratio of calcium carbide to acetylene is 1:1. Using the calculated amount of acetylene, the amount of calcium carbide involved in the reaction can be calculated using the stoichiometric ratio. Knowing the mass of calcium carbide added, the gas production rate of calcium carbide can be obtained, that is, the volume of acetylene gas produced per unit mass of calcium carbide under standard conditions.

[0145] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0146] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A device for measuring the gas generation of calcium carbide, characterized in that, The device includes a gas generator (11), a feeding section, a gas filling section, and a detection section. The gas generator (11) has a sealed cavity. The feeding section, the gas filling section, and the detection section are respectively connected to the gas generator (11). The feeding section is connected to the outer wall of the gas generator (11) and is used to add reaction raw materials into the sealed cavity. The gas filling section is used to introduce flame-retardant gas into the sealed cavity. The detection section is used to obtain environmental parameter information inside the sealed cavity. The reaction raw materials include calcium carbide and a reaction liquid, and the environmental parameter information includes pressure information and temperature information.

2. The calcium carbide gas generation measuring device according to claim 1, characterized in that, The detection unit includes a temperature measuring element (21), which is disposed on the gas generator (11) and extends into the sealed cavity to obtain the temperature information inside the sealed cavity; The detection unit includes a pressure measuring element (22) and a pressure measuring pipeline. The pressure measuring element (22) is disposed on the pressure measuring pipeline and is connected to the sealing cavity to obtain the pressure information in the sealing cavity through the pressure measuring element (22). A pressure control valve (23) is installed on the pressure measuring pipeline.

3. The calcium carbide gas generation measuring device according to claim 2, characterized in that, The calcium carbide gas generation measuring device includes a slag discharge pipe (31), which is located at the bottom of the gas generating tank (11) and connected to the sealing cavity. A slag discharge valve (32) is provided on the slag discharge pipe (31).

4. The calcium carbide gas generation measuring device according to claim 3, characterized in that, The feeding section includes a first feeding unit, which includes a liquid pipeline (41) connected to the sealed cavity and the reaction liquid source respectively, so as to inject the reaction liquid into the sealed cavity. The first feeding unit also includes a first control valve (42) and a flow meter (43) disposed on the liquid pipeline (41).

5. The calcium carbide gas generation measuring device according to claim 4, characterized in that, The feeding section includes a second feeding unit disposed on the top of the gas generator (11). The second feeding unit includes a feeding pipe (91), a sealing element (92), and a first driving unit (93). The feeding pipe (91) includes a first end and a second end. The first end is connected to the external space of the gas generator (11), and the second end is connected to the sealing cavity. The sealing element (92) is rotatably disposed inside the feeding pipe (91) and located between the first end and the second end to isolate the first end from the second end. The sealing element (92) includes a placement position for placing calcium carbide. The rotation path of the sealing element (92) includes a first position toward the first end and a second position toward the second end. The first driving unit (93) is connected to the sealing element (92) to drive the sealing element (92) to switch between the first position and the second position.

6. The calcium carbide gas generation measuring device according to claim 5, characterized in that, The feeding section includes a conveying pipe, one end of which is connected to the feeding pipe (91), and the other end extends towards the middle of the sealing cavity in the horizontal direction. A screw is provided inside the conveying pipe, and the screw is coaxially arranged with the conveying pipe. The thread crest of the screw abuts against the inner wall of the conveying pipe. The feeding section includes a second driving unit, which is connected to the screw to drive the screw to rotate inside the conveying pipe.

7. The calcium carbide gas generation measuring device according to claim 5, characterized in that, The inflation section includes an air inlet pipe (51), which is connected to the sealing cavity and the flame-retardant gas source respectively, and a second control valve (52) is provided on the air inlet pipe (51). The inflation section includes an exhaust pipe (61), the calcium carbide gas generation measuring device includes a processing tank (63), the exhaust pipe (61) is connected to the sealing cavity and the processing tank (63) respectively, and a third control valve (62) is provided on the exhaust pipe (61).

8. The calcium carbide gas generation measuring device according to claim 7, characterized in that, The calcium carbide gas generation measuring device also includes a control unit (7), wherein the temperature measuring element (21), the pressure measuring element (22), the slag discharge valve (32), the first control valve (42), the flow meter (43), the first drive unit (93), the second control valve (52) and the third control valve (62) are respectively connected to the control unit (7); The calcium carbide gas generation measuring device includes a cabinet (1), the gas generating tank (11), the feeding part, the gas filling part and the detection part are arranged inside the cabinet (1), and the control part (7) includes a display (73), which is arranged on the outer wall of the cabinet (1).

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