Device and method for measuring ammonia release amount of mining filling material

Abstract

The invention relates to a mining filling material ammonia release amount measuring device which comprises an air purification mechanism, a reaction mechanism, an ammonia absorption measuring mechanism, an assembly frame and a driving circuit, and the air purification mechanism, the reaction mechanism and the ammonia absorption measuring mechanism are all located in the assembly frame. The reaction mechanism communicates with the air purification mechanism and the ammonia gas absorption measurement mechanism through gas guide pipes, and the drive circuit is connected with the outer side face of the assembly frame. The use method comprises the following three steps: configuring the device, prefabricating a test mine filling body sample, and detecting ammonia gas. The system is high in integration degree and flexible and convenient to operate, the continuity and stability of monitoring operation are improved, meanwhile, the operation difficulty and labor intensity of detection operation are effectively reduced, and the precision of the detection operation is effectively improved.

Description

Technical Field

[0001] The invention relates to a device for measuring the ammonia release amount of a mining filling material and a monitoring method, belonging to the technical field of filling operations. Background Art

[0002] When currently used cementitious filling materials are mixed with water, they release toxic and harmful gases such as ammonia and hydrogen sulfide during mixing and curing, with ammonia being the most common. These released gases pose a health and safety threat to workers both above and below the wellbore. Furthermore, they can increase the porosity of the filling material and reduce its strength. To address this issue, various devices and technologies have been developed for detecting ammonia release in filling materials. For example, Chinese Patent Publication No. CN209878585U discloses a device for continuously measuring ammonia release from a filling material, and Invention Publication No. CN118533242A discloses a device for continuously measuring ammonia release from a filling material. While these existing devices and technologies can meet the needs of ammonia detection operations to a certain extent, in actual operation, they all suffer from varying degrees of poor detection continuity. The detection process is easily interfered with by ammonia mixed in the air and contaminating impurities generated during the test, resulting in low detection efficiency, high labor intensity, and poor detection accuracy.

[0003] Based on the above engineering problems, there is an urgent need to develop a new filling material ammonia release detection equipment and corresponding detection technology to meet the needs of actual work. Summary of the Invention

[0004] In order to address the deficiencies in the prior art, the present invention provides a device and method for measuring the ammonia release amount of mining filling materials. The system of the invention has a high degree of system integration and is flexible and convenient to operate, which improves the continuity and stability of monitoring operations, while effectively reducing the operational difficulty and labor intensity of detection operations. In addition, during the detection process, the influence of air-mixed ammonia on the detection results is effectively eliminated, and the accuracy of the detection operation is effectively improved, thereby effectively improving the work efficiency and accuracy of the detection operation of the ammonia release amount of the filling material.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: A device for measuring the ammonia release amount of a mine filling material, comprising an air purification mechanism, a reaction mechanism, an ammonia absorption and measurement mechanism, an assembly rack and a driving circuit. The assembly rack is a frame structure with a cross-section in the shape of a "U" groove. The air purification mechanism, the reaction mechanism, and the ammonia absorption and measurement mechanism are all located inside the assembly rack. The air purification mechanism and the ammonia absorption and measurement mechanism are located in front of and behind the reaction mechanism. At the same time, the reaction mechanism is respectively connected to the air purification mechanism and the ammonia absorption and measurement mechanism through air ducts. The driving circuit is connected to the outer side of the assembly rack and is respectively electrically connected to the air purification mechanism, the reaction mechanism, and the ammonia absorption and measurement mechanism. The assembly rack includes a bearing base, bearing columns, protective side plates, connecting chutes, and a tray. Among them, the bearing base is a grid plate structure with a rectangular cross-section. A connecting chute parallel to its axis is provided on both the front end face and the rear end face of the bearing base. There are several bearing columns, symmetrically distributed on both sides of the axis of the bearing base and perpendicular to the upper end face of the bearing base. At the same time, the lower end faces of each bearing column are slidably connected to the bearing base through the connecting chutes. At the same time, the bearing column is a columnar structure with a rectangular cross-section, and at least four connecting chutes are provided on the outer side of the bearing column, evenly distributed around its axis and parallel to its axis. Among the bearing columns, adjacent two bearing columns are connected to each other through the protective side plates and form a frame structure with a cross-section in the shape of a "U" groove, and the bearing base is divided into three independently distributed assembly cavities. There are three trays in total, and one tray is provided in each assembly cavity. The tray surface is parallel to the upper end face of the bearing base and is slidably connected to the outer side of the bearing column through the connecting chutes.

[0006] Furthermore, the air purification mechanism includes an air booster pump, a purification tank, a purification liquid, a desiccant, a filter screen, a pressure sensor, a flow sensor, a control valve, a pH value sensor, and a temperature and humidity sensor. Among them, the purification tank is a tank structure with its axis perpendicular to the horizontal plane. Two filter screens are provided in the purification tank, distributed from top to bottom along its axis. The filter screens divide the purification tank from top to bottom into a gas storage cavity, a drying cavity, and a water washing cavity. At the same time, a diversion port coaxial with it is provided at both the top and the bottom of the purification tank. At the same time, a liquid supplement port is provided at the bottom of the purification tank. Control valves are provided at both diversion ports and the liquid supplement port. The diversion port at the bottom of the purification tank is connected to an air booster pump through a diversion pipe. The diversion port at the top is connected to another air booster pump through a diversion pipe, and the air booster pump connected to the diversion port at the top of the purification tank is also connected to the reaction mechanism and the ammonia absorption and measurement mechanism through a diversion pipe. In addition, a pressure sensor, a flow sensor, and a temperature and humidity sensor are provided in the gas storage cavity. At least one temperature and humidity sensor is provided in the drying cavity. A pH value sensor is provided in the water washing cavity. The pressure sensor, the flow sensor, the control valve, the pH value sensor, the temperature and humidity sensor, and the air booster pump are all electrically connected to the driving circuit. The purification liquid is located in the water washing cavity, and the distance between the liquid level of the purification liquid and the filter screen above it is not less than 1 centimeter.

[0007] Further, at least one electric heating mechanism is additionally provided inside the side wall of the purification tank, and the electric heating mechanism is located inside the side wall corresponding to the drying chamber and is electrically connected to the drive circuit.

[0008] Further, the reaction mechanism includes a reaction chamber, a weighing scale, a stirring mechanism, a metering pump, a negative pressure fan, a control valve, and a three-way valve. The bottom of the reaction chamber is connected to the upper end surface of the weighing scale and is coaxially distributed. The axis of the reaction chamber is vertically distributed with respect to the horizontal plane. It includes a reaction cylinder, a sealing cover, an electric heating mechanism, an ultrasonic oscillation mechanism, a temperature and humidity sensor, a spraying pump, and spraying nozzles. The reaction cylinder has a "U" - shaped cylindrical structure in the axial cross - section, and its upper end surface is connected to the sealing cover to form a sealed cavity structure. The stirring mechanism is located inside the reaction cylinder, coaxially distributed with the reaction cylinder and connected to the sealing cover. At least two electric heating mechanisms and at least two ultrasonic oscillation mechanisms are provided inside the side wall of the reaction cylinder and are evenly distributed around its axis. A temperature and humidity sensor and several spraying nozzles evenly distributed around its axis are provided on the lower end surface of the sealing cover. The axis of the spraying nozzles intersects with the axis of the reaction cylinder at an angle of 10° - 60°, and each spraying nozzle is additionally connected to the spraying pump. The spraying pump and the negative pressure fan are both connected to the assembly frame. At the same time, a water replenishment port, a feeding port, an air inlet, and an exhaust port are provided on the sealing cover. The water replenishment port is connected to each spraying nozzle and the spraying pump through a diversion pipe. The feeding port is connected to the metering pump through a diversion pipe, and the metering pump is connected to the assembly frame. The air inlet is connected to the air purification mechanism through a diversion pipe. The exhaust port is connected to the negative pressure fan and the ammonia absorption and measurement mechanism through a three - way valve, and the three - way valve is additionally connected to the ammonia absorption and measurement mechanism through a diversion pipe. At the same time, control valves are provided at the water replenishment port, the feeding port, the air inlet, and the exhaust port. The weighing scale, the stirring mechanism, the metering pump, the negative pressure fan, the control valve, the three - way valve, the electric heating mechanism, the ultrasonic oscillation mechanism, the temperature and humidity sensor, and the spraying pump are all electrically connected to the drive circuit.

[0009] Further, a shock - absorbing base is provided at the bottom of the reaction cylinder, and the reaction cylinder is connected to the weighing scale through the shock - absorbing base.

[0010] Furthermore, the ammonia absorption measuring mechanism includes a supporting keel, a tray, a chuck, an annular drive guide rail, a collecting bottle, a pressure stabilizing chamber, a diversion row, a control valve, and a one-way valve, wherein the supporting keel is an "I"-shaped cylindrical frame structure in an axial cross-section, and at least three trays are evenly distributed around its axis on the bottom of the supporting keel groove body, and the tray plate surface is perpendicular to the supporting keel axis. At the same time, the lower end surface of the tray is slidably connected to the bottom of the supporting keel groove through an annular drive guide rail, and the annular drive guide rail is a closed annular structure coaxially distributed with the supporting keel. At least one of the chucks is a disc structure coaxially distributed with the supporting keel, and a slot is provided on the chuck at a position corresponding to the tray. The number of the collecting bottles is consistent with the tray, and each collecting bottle is connected to the upper end face of a tray and coaxially distributed. At the same time, the collecting bottle is embedded in the card slot of the tray. A drainage port is provided on the top of the collecting bottle, and a control valve is provided at the drainage port and is connected to the diversion row through the control valve. The diversion row is connected to the top of the supporting keel groove body, and the diversion row is connected to the pressure stabilizing chamber through a guide pipe. The pressure stabilizing chamber is connected to the upper end face of the supporting keel, and an air inlet and an exhaust port are provided on its lower end face, wherein the air inlet is connected to the reaction mechanism through the guide pipe, and the exhaust port is connected to the diversion row, and a one-way valve is provided at the air inlet, and a control valve is provided at the exhaust port. The annular drive guide rail and the control valve are electrically connected to the drive circuit.

[0011] Furthermore, the pressure-stabilizing chamber includes a pressure-equalizing chamber, an elastic airbag, and an air pressure sensor, wherein the pressure-equalizing chamber is a cylindrical closed cavity structure, and its axis is perpendicular to the upper end face of the supporting keel. The elastic airbag is embedded in the pressure-equalizing chamber and coaxially distributed in the pressure-equalizing chamber, and the elastic airbag is connected to the top of the pressure-equalizing chamber, and its outer side surface is abutted against and slidably connected to the side wall of the pressure-equalizing chamber. An air pressure sensor is provided in the elastic airbag and at the bottom of the pressure-equalizing chamber. At the same time, the elastic airbag is connected to the air booster pump of the air purification mechanism through a guide tube, and the air pressure sensor and the control valve are electrically connected to the drive circuit.

[0012] Furthermore, the driving circuit is a circuit system based on any one of a DSP chip and an FPGA chip.

[0013] A method for using a device for measuring ammonia release of mining filling materials comprises the following steps: S1, device configuration, first, according to the experimental requirements, set the structure of the air purification mechanism, reaction mechanism, ammonia absorption measurement mechanism and corresponding equipment, then assemble the air purification mechanism, reaction mechanism, ammonia absorption measurement mechanism and assembly frame; after the assembly is completed, first drive the air purification mechanism to operate, fill and inject the air purified by ammonia removal into the reaction mechanism and ammonia absorption measurement mechanism in sequence, and measure the injected gas to be free of ammonia by the ammonia absorption measurement mechanism. Then, maintain the pressure of the air purification mechanism, reaction mechanism, and ammonia absorption measurement mechanism and let them stand by; S2, testing the prefabrication of mining filling samples. After completing step S1, first add the solid material for preparing the filling into the reaction mechanism, then add deionized water and air purified by the air purification mechanism into the reaction mechanism, and simultaneously drive the stirring mechanism in the reaction mechanism to stir the materials to prepare the filling; and during the filling preparation process, the ammonia released from the filling at each stage from preparation to curing is injected into the ammonia absorption measurement mechanism together with the clean air prepared by the air purification mechanism for measurement; S3, ammonia detection, the ammonia-containing gas delivered by the reaction mechanism is injected into the collection bottle and chemically reacts with the absorption liquid in the collection bottle. Then, the amount of ammonia generated is detected and calculated using Nessler's reagent spectrophotometry.

[0014] Compared with the existing technology, the system of the present invention has a high degree of integration, is flexible and convenient to operate, improves the continuity and stability of the monitoring operation, and effectively reduces the operational difficulty and labor intensity of the detection operation. In addition, during the detection process, it effectively eliminates the influence of air mixed with ammonia on the detection results, effectively improves the accuracy of the detection operation, and thus effectively improves the work efficiency and accuracy of the filling material ammonia release detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments; Figure 1 Schematic diagram of the system structure of the present invention; Figure 2 It is a schematic diagram of the partial structure of the air purification mechanism; Figure 3 Schematic diagram of the partial structure of the reaction mechanism in cross section; Figure 4 This is a schematic diagram of the cross-sectional structure of the ammonia absorption measurement mechanism; Figure 5 It is a schematic diagram of the chuck structure from a top view; Figure 6 Schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0016] In order to facilitate the construction of the technical means, creative features, objectives and effects achieved by the present invention, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1-Figure 5As shown in the figure, a device for measuring the ammonia release amount of a mine filling material includes an air purification mechanism 1, a reaction mechanism 2, an ammonia absorption and measurement mechanism 3, an assembly frame 4, and a drive circuit 5. The assembly frame 4 is a trough-shaped frame structure with a cross-section in the shape of a "U". The air purification mechanism 1, the reaction mechanism 2, and the ammonia absorption and measurement mechanism 3 are all located inside the assembly frame 4. The air purification mechanism 1 and the ammonia absorption and measurement mechanism 3 are located in front of and behind the reaction mechanism 2. At the same time, the reaction mechanism 3 is respectively connected to the air purification mechanism 1 and the ammonia absorption and measurement mechanism 3 through air ducts. The drive circuit 5 is connected to the outer side surface of the assembly frame 4 and is electrically connected to the air purification mechanism 1, the reaction mechanism 2, and the ammonia absorption and measurement mechanism 3 respectively.

[0018] In this embodiment, the assembly frame 4 includes a bearing base 41, bearing columns 42, protective side plates 43, connecting chutes 44, and support plates 45. The bearing base 41 is a grid plate structure with a rectangular cross-section. A connecting chute 44 parallel to its axis is provided on both the front end face and the rear end face of the bearing base 41. There are several bearing columns 42, symmetrically distributed on both sides of the axis of the bearing base 41 and perpendicular to the upper end face of the bearing base 41. At the same time, the lower end faces of each bearing column 42 are slidably connected to the bearing base 41 through the connecting chutes 44. The bearing column 42 is a columnar structure with a rectangular cross-section, and at least four connecting chutes 44 are provided on the outer side surface of the bearing column 42, evenly distributed around its axis and parallel to its axis. Among the bearing columns 42, adjacent bearing columns 42 are connected to each other through the protective side plates 43 and form a trough-shaped structure with a cross-section in the shape of a "U", dividing the bearing base 41 into three independently distributed assembly cavities 46. There are three support plates 45 in total, and one support plate 45 is provided in each assembly cavity 46. The plate surface of the support plate 45 is parallel to the upper end face of the bearing base 41 and is slidably connected to the outer side surface of the bearing column 42 through the connecting chutes 44.

[0019] In this embodiment, the air purification mechanism 1 includes an air booster pump 11, a purification tank 12, a purification liquid 13, a desiccant 14, a filter 15, an air pressure sensor 16, a flow sensor 17, a control valve 18, a pH sensor 19, and a temperature and humidity sensor 10, wherein the purification tank 12 is a tank structure whose axis is perpendicular to the horizontal plane, and two filters 15 are provided in the purification tank 12, which are distributed from top to bottom along its axis. The filter 15 divides the purification tank 12 from top to bottom into an air storage chamber 151, a drying chamber 152 and a water washing chamber 153. At the same time, the top and bottom of the purification tank 12 are each provided with a guide port 101 coaxially distributed therewith, and a liquid replenishment port 102 is further provided at the bottom of the purification tank 12. At the same time, a control valve 18 is provided at both the guide port 101 and the liquid replenishment port 102. The guide port 101 at the bottom of the purification tank 12 is connected to the air storage chamber 151 by a guide pipe. It is connected to an air booster pump 11, and the top diversion port 101 is connected to another air booster pump 11 through a diversion pipe, and the air booster pump 11 connected to the top diversion port 101 of the purification tank 12 is also connected to the reaction mechanism 2 and the ammonia absorption measurement mechanism 3 through a diversion pipe. In addition, an air pressure sensor 16, a flow sensor 17 and a temperature and humidity sensor 10 are provided in the air storage chamber 151, at least one temperature and humidity sensor 10 is provided in the drying chamber 152, and a pH sensor 19 is provided in the water washing chamber 153. The air pressure sensor 16, the flow sensor 17, the control valve 18, the pH sensor 19, the temperature and humidity sensor 10 and the air booster pump 11 are all electrically connected to the drive circuit 5. The purified liquid 13 is located in the water washing chamber 153, and the distance between the liquid level of the purified liquid 13 and the filter 15 above it is not less than 1 cm.

[0020] At least one electric heating mechanism 103 is further provided in the side wall of the purification tank 12 , and the electric heating mechanism 103 is located in the side wall corresponding to the drying chamber 152 and is electrically connected to the driving circuit 5 .

[0021] Further optimized, the purification liquid is an acidic liquid.

[0022] It should be specifically noted that the reaction mechanism 2 includes a reaction chamber 21, a weighing scale 22, a stirring mechanism 23, a metering pump 24, a negative pressure fan 25, a control valve 18, and a three-way valve 26. The bottom of the reaction chamber 21 is connected to the upper end face of the weighing scale 22 and is coaxially distributed. The axis of the reaction chamber 21 is perpendicular to the horizontal plane and includes a reaction cylinder 211, a sealing cover 212, an electric heating mechanism 103, an ultrasonic oscillation mechanism 213, a temperature and humidity sensor 10, a spray pump 214, and a spray head 215. The reaction cylinder 211 has a "U" - shaped cross - section in the axial direction and is a cylindrical structure. Its upper end face is connected to the sealing cover 212 to form a sealed cavity structure. The stirring mechanism 23 is located inside the reaction cylinder 211, coaxially distributed with the reaction cylinder 211 and connected to the sealing cover 212. At least two electric heating mechanisms 103 and at least two ultrasonic oscillation mechanisms 213 are arranged on the side wall of the reaction cylinder 211 and are evenly distributed around its axis. A temperature and humidity sensor 10 and several spray heads 215 evenly distributed around its axis are arranged on the lower end face of the sealing cover 212. The axis of the spray head 215 intersects with the axis of the reaction cylinder 211 at an angle of 10° - 60°, and each spray head 215 is also connected to the spray pump 214. The spray pump 214 and the negative pressure fan 25 are both connected to the mounting rack 4. At the same time, a water replenishing port 216, a feeding port 217, an air inlet 218, and an exhaust port 219 are arranged on the sealing cover 212. The water replenishing port 216 is connected to each spray head 215 and the spray pump 214 through a diversion pipe. The feeding port 217 is connected to the metering pump 24 through a diversion pipe, and the metering pump 24 is connected to the mounting rack 4. The air inlet 218 is connected to the air purification mechanism 1 through a diversion pipe. The exhaust port 219 is connected to the negative pressure fan 25 and the ammonia absorption and measurement mechanism 3 through the three - way valve 26, and the three - way valve 26 is also connected to the ammonia absorption and measurement mechanism 3 through a diversion pipe. At the same time, control valves 18 are also arranged at the water replenishing port 216, the feeding port 217, the air inlet 218, and the exhaust port 219. The weighing scale 22, the stirring mechanism 23, the metering pump 24, the negative pressure fan 25, the control valve 18, the three - way valve 26, the electric heating mechanism 103, the ultrasonic oscillation mechanism 213, the temperature and humidity sensor 10, and the spray pump 214 are all electrically connected to the drive circuit 5.

[0023] Further optimized, a shock - absorbing base 27 is arranged at the bottom of the reaction cylinder 211 and is connected to the weighing scale 22 through the shock - absorbing base 27.

[0024] It is emphasized that the ammonia absorption measuring mechanism 3 includes a supporting keel 31, a tray 32, a chuck 33, an annular drive guide rail 34, a collecting bottle 35, a pressure stabilizing chamber 36, a diversion row 37, a control valve 18, and a one-way valve 38, wherein the supporting keel 31 is a cylindrical frame structure with an axial cross-section of an "I" shape, and at least three trays 32 are evenly distributed around its axis on the bottom of the supporting keel 31 trough body, and the plate surface of the tray 32 is perpendicular to the axis of the supporting keel 31. At the same time, the lower end surface of the tray 32 is slidably connected to the bottom of the supporting keel 31 trough through the annular drive guide rail 34, and the annular drive guide rail 34 is a closed annular structure coaxially distributed with the supporting keel 31. There is at least one chuck 33, which is a disc structure coaxially distributed with the supporting keel 31, and a slot 39 is provided on the chuck 33 at a position corresponding to the tray 33. The number of collecting bottles 35 Consistent with the tray 32, each collecting bottle 35 is connected to the upper end surface of a tray 32 and coaxially distributed. At the same time, the collecting bottle 35 is also embedded in the card slot 39 of the tray. A drainage port 30 is provided on the top of the collecting bottle 35. A control valve 18 is provided at the drainage port 30 and is connected to the diverter row 37 through the control valve 18. The diverter row 37 is connected to the top of the trough body of the supporting keel 31. At the same time, the diverter row 37 is connected to the pressure stabilizing chamber 36 through a guide pipe. The pressure stabilizing chamber 36 is connected to the upper end surface of the supporting keel 31, and an air inlet 218 and an exhaust port 219 are provided on its lower end surface, wherein the air inlet 218 is connected to the reaction mechanism 2 through the guide pipe, and the exhaust port 219 is connected to the diverter row 37, and a one-way valve 38 is provided at the air inlet 218, and a control valve 18 is provided at the exhaust port 219. The annular drive guide rail 34 and the control valve 18 are electrically connected to the drive circuit 5.

[0025] The Tonggong design incorporates a tray, chuck, and circular drive rail structure, allowing the collection bottles on the tray to be forcibly positioned by the chuck, thereby improving the stability and reliability of the bottle positioning. The circular drive rail also allows multiple collection bottles to rotate around the axis of the load-bearing keel, allowing for adjustment of the collection bottle's working position and rapid replacement of the bottles without affecting the continuity of monitoring operations.

[0026] Among them, the pressure-stabilizing chamber 36 includes a pressure-equalizing chamber 361, an elastic airbag 362, and an air pressure sensor 16, wherein the pressure-equalizing chamber 361 is a cylindrical closed cavity structure, and its axis is perpendicular to the upper end face of the supporting keel 31. The elastic airbag 362 is embedded in the pressure-equalizing chamber 361 and coaxially distributed with the pressure-equalizing chamber 361, and the elastic airbag 362 is connected to the top of the pressure-equalizing chamber 361, and its outer side surface is against and slidably connected to the side wall of the pressure-equalizing chamber 361. An air pressure sensor 16 is provided in the elastic airbag 362 and at the bottom of the pressure-equalizing chamber 361. At the same time, the elastic airbag 362 is connected to the air booster pump 11 of the air purification mechanism 1 through the guide tube, and the air pressure sensor 16 is electrically connected to the drive circuit 5.

[0027] The elastic airbag set up can maintain the air pressure inside the elastic airbag stable by introducing high-pressure gas from the air booster pump, so that the air pressure of the gas delivered from the reaction mechanism is in a constant state, which facilitates the uniform and stable delivery of the gas generated by the reaction mechanism to each collection bottle, thereby improving the accuracy and stability of the detection operation.

[0028] In this embodiment, the driving circuit 5 is a circuit system based on any one of a DSP chip and an FPGA chip.

[0029] like Figure 6 As shown, a method for using a device for measuring ammonia release of mining filling materials includes the following steps: S1, device configuration, first, according to the experimental requirements, set the structure of the air purification mechanism, reaction mechanism, ammonia absorption measurement mechanism and corresponding equipment, then assemble the air purification mechanism, reaction mechanism, ammonia absorption measurement mechanism and assembly frame; after the assembly is completed, first drive the air purification mechanism to operate, fill and inject the air purified by ammonia removal into the reaction mechanism and ammonia absorption measurement mechanism in sequence, and measure the injected gas to be free of ammonia by the ammonia absorption measurement mechanism. Then, maintain the pressure of the air purification mechanism, reaction mechanism, and ammonia absorption measurement mechanism and let them stand by; S2, testing the prefabrication of mining filling samples. After completing step S1, first add the solid material for preparing the filling into the reaction mechanism, then add deionized water and air purified by the air purification mechanism into the reaction mechanism, and simultaneously drive the stirring mechanism in the reaction mechanism to stir the materials to prepare the filling; and during the filling preparation process, the ammonia released from the filling at each stage from preparation to curing is injected into the ammonia absorption measurement mechanism together with the clean air prepared by the air purification mechanism for measurement; S3, ammonia detection, the ammonia-containing gas delivered by the reaction mechanism is injected into the collection bottle and chemically reacts with the absorption liquid in the collection bottle. Then, the amount of ammonia generated is detected and calculated using Nessler's reagent spectrophotometry.

[0030] In this embodiment, during the prefabrication of concrete blanks in step S2, the amount of filling material added, the stirring speed, the exhaust speed and the exhaust volume are assisted by measuring scales, stirring mechanisms, metering pumps and other equipment to provide a reference standard for ammonia detection in step S3.

[0031] Compared with the existing technology, the system of the present invention has a high degree of integration, is flexible and convenient to operate, improves the continuity and stability of the monitoring operation, and effectively reduces the operational difficulty and labor intensity of the detection operation. In addition, during the detection process, it effectively eliminates the influence of air mixed with ammonia on the detection results, effectively improves the accuracy of the detection operation, and thus effectively improves the work efficiency and accuracy of the filling material ammonia release detection operation.

[0032] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring ammonia release of mining filling materials, characterized in that: The ammonia release amount measuring device for the mine filling material includes an air purification mechanism, a reaction mechanism, an ammonia absorption and measurement mechanism, an assembly rack, and a drive circuit. The assembly rack is a U-shaped groove-shaped frame structure with a cross-section. The air purification mechanism, the reaction mechanism, and the ammonia absorption and measurement mechanism are all located inside the assembly rack. The air purification mechanism and the ammonia absorption and measurement mechanism are located in front of and behind the reaction mechanism. At the same time, the reaction mechanism is respectively connected to the air purification mechanism and the ammonia absorption and measurement mechanism through air ducts. The drive circuit is connected to the outer side of the assembly rack and is respectively electrically connected to the air purification mechanism, the reaction mechanism, and the ammonia absorption and measurement mechanism. The assembly rack includes a bearing base, bearing columns, protective side plates, connecting chutes, and a tray. Among them, the bearing base is a grid plate structure with a rectangular cross-section. A connecting chute parallel to its axis is provided on both the front end face and the rear end face of the bearing base. There are several bearing columns, symmetrically distributed on both sides of the axis of the bearing base and perpendicular to the upper end face of the bearing base. At the same time, the lower end faces of each bearing column are slidably connected to the bearing base through the connecting chute. At the same time, the bearing column is a columnar structure with a rectangular cross-section, and at least four connecting chutes are provided on the outer side of the bearing column, evenly distributed around its axis and parallel to its axis. Among the bearing columns, adjacent bearing columns are connected to each other through protective side plates and form a U-shaped groove-shaped structure with a cross-section, and the bearing base is divided into three independently distributed assembly cavities. There are three trays in total, and one tray is provided in each assembly cavity. The tray surface is parallel to the upper end face of the bearing base and is slidably connected to the outer side of the bearing column through the connecting chute.

2. The device for measuring ammonia release of mining filling materials according to claim 1, characterized in that: The air purification mechanism includes an air booster pump, a purification tank, a purification liquid, a desiccant, a filter screen, a pressure sensor, a flow sensor, a control valve, a pH value sensor, and a temperature and humidity sensor. Among them, the purification tank is a tank structure with an axis perpendicular to the horizontal plane. Two filter screens are provided in the purification tank, distributed from top to bottom along its axis. The filter screens divide the purification tank into a gas storage cavity, a drying cavity, and a water washing cavity from top to bottom. At the same time, a diversion port coaxial with it is provided at both the top and the bottom of the purification tank. At the same time, another liquid replenishment port is provided at the bottom of the purification tank. Control valves are provided at both diversion ports and the liquid replenishment port. The diversion port at the bottom of the purification tank is connected to an air booster pump through a diversion pipe. The diversion port at the top is connected to another air booster pump through a diversion pipe, and the air booster pump connected to the diversion port at the top of the purification tank is also connected to the reaction mechanism and the ammonia absorption and measurement mechanism through a diversion pipe. In addition, a pressure sensor, a flow sensor, and a temperature and humidity sensor are provided in the gas storage cavity. At least one temperature and humidity sensor is provided in the drying cavity. A pH value sensor is provided in the water washing cavity. The pressure sensor, the flow sensor, the control valve, the pH value sensor, the temperature and humidity sensor, and the air booster pump are all electrically connected to the drive circuit. The purification liquid is located in the water washing cavity, and the distance between the liquid level of the purification liquid and the filter screen above it is not less than 1 centimeter.

3. A device for measuring ammonia release of mining filling materials according to claim 2, characterized in that: At least one electric heating mechanism is additionally provided inside the side wall of the purification tank, and the electric heating mechanism is located inside the side wall corresponding to the drying chamber and is electrically connected to the drive circuit.

4. The device for measuring ammonia release of mining filling materials according to claim 1, characterized in that: The reaction mechanism includes a reaction chamber, a weighing scale, a stirring mechanism, a metering pump, a negative pressure fan, a control valve, and a three-way valve. The bottom of the reaction chamber is connected to the upper end surface of the weighing scale and is coaxially distributed. The axis of the reaction chamber is vertically distributed with respect to the horizontal plane. It includes a reaction cylinder, a sealing cover, an electric heating mechanism, an ultrasonic oscillation mechanism, a temperature and humidity sensor, a spray pump, and a spray head. The reaction cylinder has a "凵"-shaped cylindrical structure in its axial cross-section, and its upper end surface is connected to the sealing cover to form a sealed cavity structure. The stirring mechanism is located inside the reaction cylinder, coaxially distributed with the reaction cylinder and connected to the sealing cover. At least two electric heating mechanisms and at least two ultrasonic oscillation mechanisms are provided inside the side wall of the reaction cylinder, evenly distributed around its axis. A temperature and humidity sensor and several spray heads evenly distributed around its axis are provided on the lower end surface of the sealing cover. The axis of the spray head intersects with the axis of the reaction cylinder at an angle of 10°-60°. At the same time, each spray head is additionally connected to the spray pump. The spray pump and the negative pressure fan are both connected to the mounting frame. At the same time, a water replenishing port, a feeding port, an air inlet, and an exhaust port are provided on the sealing cover. The water replenishing port is connected to each spray head and the spray pump through a diversion pipe respectively. The feeding port is connected to the metering pump through a diversion pipe, and the metering pump is connected to the mounting frame. The air inlet is connected to the air purification mechanism through a diversion pipe. The exhaust port is connected to the negative pressure fan and the ammonia absorption and measurement mechanism through a three-way valve respectively, and the three-way valve is additionally connected to the ammonia absorption and measurement mechanism through a diversion pipe. At the same time, control valves are additionally provided at the water replenishing port, the feeding port, the air inlet, and the exhaust port. The weighing scale, the stirring mechanism, the metering pump, the negative pressure fan, the control valve, the three-way valve, the electric heating mechanism, the ultrasonic oscillation mechanism, the temperature and humidity sensor, and the spray pump are all electrically connected to the drive circuit.

5. The device for measuring ammonia release of mining filling materials according to claim 4, characterized in that: A shock-absorbing base is provided at the bottom of the reaction cylinder and is connected to the weighing scale through the shock-absorbing base.

6. The device for measuring ammonia release of mining filling materials according to claim 1, characterized in that: The ammonia absorption measuring mechanism includes a supporting keel, a tray, a chuck, an annular drive guide rail, a collecting bottle, a pressure stabilizing chamber, a diversion row, a control valve, and a one-way valve, wherein the supporting keel is a cylindrical frame structure with an axial cross-section in the shape of an "I" character, and at least three trays are evenly distributed around the axis of the supporting keel groove body, and the tray plate surface is perpendicular to the supporting keel axis. At the same time, the lower end surface of the tray is slidably connected to the bottom of the supporting keel groove through the annular drive guide rail, and the annular drive guide rail is a closed annular structure coaxially distributed with the supporting keel. There is at least one chuck, which is a disc structure coaxially distributed with the supporting keel, and a slot is provided on the chuck at a position corresponding to the tray. The number of collecting bottles is consistent with that of the tray, and each collecting bottle is connected to the upper end face of a tray and coaxially distributed. At the same time, the collecting bottle is embedded in the card slot of the tray. A drainage port is provided on the top of the collecting bottle, and a control valve is provided at the drainage port and is connected to a diversion row through the control valve. The diversion row is connected to the top of the supporting keel trough body, and the diversion row is connected to the pressure stabilizing chamber through a guide pipe. The pressure stabilizing chamber is connected to the upper end face of the supporting keel, and an air inlet and an exhaust port are provided on its lower end face, wherein the air inlet is connected to the reaction mechanism through the guide pipe, and the exhaust port is connected to the diversion row, and a one-way valve is provided at the air inlet, and a control valve is provided at the exhaust port. The annular drive guide rail and the control valve are electrically connected to the drive circuit.

7. The device for measuring ammonia release of mining filling materials according to claim 6, characterized in that: The pressure stabilizing chamber includes a pressure equalizing chamber, an elastic airbag, and an air pressure sensor, wherein the pressure equalizing chamber is a cylindrical closed cavity structure, whose axis is perpendicular to the upper end face of the load-bearing keel, the elastic airbag is embedded in the pressure equalizing chamber and coaxially distributed in the pressure equalizing chamber, and the elastic airbag is connected to the top of the pressure equalizing chamber, and its outer side surface is against and slidably connected to the side wall of the pressure equalizing chamber, an air pressure sensor is arranged in the elastic airbag and at the bottom of the pressure equalizing chamber, and the elastic airbag is connected to the air booster pump of the air purification mechanism through a guide tube, and the air pressure sensor and the control valve are electrically connected to the drive circuit.

8. The device for measuring ammonia release of mining filling materials according to claim 1, characterized in that: The driving circuit is a circuit system based on any one of a DSP chip and an FPGA chip.

9. A method for using the device for measuring ammonia release of mining filling materials according to claim 1, characterized in that: The method for using the device for measuring the ammonia release amount of mining filling materials comprises the following steps: S1, device configuration, first, according to the experimental requirements, set the structure of the air purification mechanism, reaction mechanism, ammonia absorption measurement mechanism and corresponding equipment, then assemble the air purification mechanism, reaction mechanism, ammonia absorption measurement mechanism and assembly frame; after the assembly is completed, first drive the air purification mechanism to operate, fill and inject the air purified by ammonia removal into the reaction mechanism and ammonia absorption measurement mechanism in sequence, and measure the injected gas to be free of ammonia by the ammonia absorption measurement mechanism. Then, maintain the pressure of the air purification mechanism, reaction mechanism, and ammonia absorption measurement mechanism and let them stand by; S2, testing the prefabrication of mining filling samples. After completing step S1, first add the solid material for preparing the filling into the reaction mechanism, then add deionized water and air purified by the air purification mechanism into the reaction mechanism, and simultaneously drive the stirring mechanism in the reaction mechanism to stir the materials to prepare the filling; and during the filling preparation process, the ammonia released from the filling at each stage from preparation to curing is injected into the ammonia absorption measurement mechanism together with the clean air prepared by the air purification mechanism for measurement; S3, ammonia detection, the ammonia-containing gas delivered by the reaction mechanism is injected into the collection bottle and reacts chemically with the absorption liquid in the collection bottle. Then, the amount of ammonia generated is detected and calculated using Nessler's reagent spectrophotometry.

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