Quantitative testing device for ammonia nitrogen substances in fly ash

Abstract

The utility model relates to a quantitative testing device for fly ash ammonia nitrogen substances, and relates to the field of fly ash detection devices. The device comprises a material containing box, a material containing container and an ammonia gas detector, the bottom face of the material containing box is provided with an opening, a material supporting piece is arranged at the opening of the material containing box, the vertical end face of one side of the material containing box is communicated with a gas inlet piece, a plurality of heating resistors are vertically fixed to the inner wall of the material containing box, and an electronic thermometer is fixed to the front end face of the material containing box; a gas guide pipe is vertically communicated and fixed to the top surface of the material containing box, a gas pump is communicated and assembled to the gas guide pipe, an absorption solution is injected into the material containing container, and an ammonia gas sensitive electrode is fixed to the top surface of the material containing container in a manner that the absorption solution is inserted into the top surface of the material containing container. The influence of the temperature on the concentration rule of ammonia volatilization is detected by adjusting the temperature, the influence of the ammonia on the concrete can be detected in the later period, meanwhile, the amount of the denitration fly ash added into the concrete is selected according to the measured ammonia concentration, and therefore the environmental protection property and durability of the concrete are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of fly ash detection devices, and in particular to a quantitative testing device for ammonia and nitrogen substances in fly ash. Background Art

[0002] Fly ash is an important admixture of concrete and is widely used in concrete. During the mixing process of concrete, ammonium salts or ammonia react with the alkali produced by cement hydration to produce ammonia water. With the help of the heat generated by cement hydration, ammonia water generates ammonia gas and water, and the ammonia gas is gradually released. This reaction is a slow and reversible process. The gas generated will slowly evaporate during the transportation and construction of concrete and will not be completely evaporated in a short time. As a result, when the concrete is poured in a relatively closed space, the volatilized ammonia gas in the concrete cannot be diffused in time. When the ammonia concentration reaches a certain level, construction workers in the closed space have difficulty breathing and cannot work normally, which will affect the progress of the project construction. Therefore, the ammonia nitrogen test of fly ash is one of the important parameters in concrete preparation. When measuring, the concentration of ammonia nitrogen in fly ash is often judged by the amount of ammonia released.

[0003] The existing announcement number is CN206618714U, a device for measuring the time-dependent release of ammonia in concrete, comprising a blower, a sealed box, a glass washing bottle and a measuring host, the sealed box comprising an air inlet and an air outlet, a fence rack and a sample container placed on the fence rack being provided in the sealed box, the air outlet of the blower being connected to the air inlet of the sealed box through a ventilation hose, the air outlet of the sealed box being connected to the upper end of an air inlet pipe provided on the glass washing bottle through a ventilation hose, the lower end of the air inlet pipe being inserted into the absorption solution contained in the glass washing bottle, the glass washing bottle being further provided with an air outlet pipe communicating with the outside air and an ammonia sensitive electrode for measuring ammonia, the lower end of the ammonia sensitive electrode being inserted into the absorption solution, and the upper end being connected to the measuring host through a connecting wire, the blower blows the ammonia released from the concrete in the sample container in the sealed box to the glass washing bottle for absorption by the absorption solution, and the ammonia release amount of the concrete sample is measured through the ammonia sensitive electrode and the measuring host.

[0004] With respect to the above-mentioned related technologies, the inventors found that when the fly ash ammonia nitrogen substance detection in the above-mentioned concrete is carried out, the fly ash ammonia nitrogen substance detection in the concrete can only be carried out at a single temperature, the ammonia release amount in the fly ash ammonia nitrogen substance in the concrete is detected at a single temperature, and the ammonia release detection temperature range is single, resulting in reduced accuracy of ammonia release detection. Utility Model Content

[0005] In order to overcome the problem that the existing fly ash ammonia nitrogen detection in concrete can only be carried out at a single temperature, the ammonia release amount in the fly ash ammonia nitrogen in concrete is detected at a single temperature, and the ammonia release temperature range is single, which leads to reduced accuracy of ammonia release detection, the present application provides a quantitative testing device for fly ash ammonia nitrogen.

[0006] The present application provides a quantitative test device for ammonia nitrogen in fly ash using the following technical solution:

[0007] A quantitative testing device for ammonia and nitrogen substances in fly ash comprises a material holding box, a material holding container and an ammonia detector. The bottom surface of the material holding box is opened, and a material supporting piece is provided at the opening of the material holding box. An air inlet piece is connected to a vertical end surface of one side of the material holding box, and a plurality of heating resistors are vertically fixed on the inner wall of the material holding box, and an electronic thermometer is fixed on the front end surface of the material holding box. An air duct is vertically connected and fixed to the top surface of the material holding box, and an air pump is assembled on the air duct. The interior of the material holding container is filled with an absorption solution, and an ammonia sensitive electrode is inserted into the absorption solution and fixed on the top surface of the material holding container, and an exhaust pipe is vertically inserted and connected to the top surface of the material holding container, and the ammonia sensitive electrode is electrically connected to the input end of the ammonia detector through a wire, and the other end of the air duct is inserted into the absorption solution of the material holding container.

[0008] By adopting the above technical solution, during use, a concrete sample mixed with denitrified fly ash is placed on a material support, which is then assembled in a material container. Then, an absorption solution is poured into the interior of the material container, and then an ammonia gas-sensitive electrode is inserted into the absorption solution in the material container. At the same time, a section of the air guide tube is connected and fixed to the top surface of the material container, and then the other end of the air guide tube is inserted into the absorption solution in the material container. During measurement, the heating resistor is controlled to generate heat according to the temperature requirement, and the temperature in the material container is measured using an electronic thermometer. When the temperature reaches the appropriate temperature, the air pump is started to drive the external air into the material container through the air inlet. Then, after the air contacts the concrete sample, it is introduced into the absorption solution through the air duct. After the ammonia in the air reacts with the absorption solution, the ammonia concentration reading is measured by the ammonia sensitive electrode and transmitted to the ammonia detector. In this way, after the concrete sample air reacts with the absorption solution, the ammonia concentration can be quickly detected by the ammonia detector, thereby improving the accuracy of ammonia concentration detection. By adjusting the temperature, the influence of the temperature on the concentration law of ammonia volatilization is detected, which is conducive to the later detection of the influence of ammonia on concrete. At the same time, the measured ammonia concentration selects the amount of denitrification fly ash added to the concrete, thereby ensuring the environmental protection and durability of the concrete.

[0009] Optionally, the material supporting member includes a bottom plate, which is arranged at the open end of the material holding box, and screw seats are horizontally fixed on both sides of the bottom plate.

[0010] By adopting the above technical solution, the bottom plate is used to block the bottom opening end of the material holding box, and the screw seat on the bottom plate is convenient for fixed assembly at the bottom opening of the material holding box.

[0011] Optionally, a support box is horizontally arranged above the bottom plate, and studs are vertically fixed on the bottom surface of the support box.

[0012] By adopting the above technical solution, the support box is used to hold the concrete sample, and the studs at the bottom end of the support box are used to adjust the height of the support box.

[0013] Optionally, a screw barrel is vertically fixed on the top surface of the base plate, and the screw barrel is assembled and connected with the stud by threads.

[0014] By adopting the above technical solution, the stud moves spirally in the screw barrel, vertically supporting and adjusting the height of the support box to meet the support height requirements of different concrete samples.

[0015] Optionally, a plurality of legs are vertically fixed on the bottom surface of the material holding box, and a screw hole seat is horizontally fixed on the bottom of the vertical end surface of the material holding box, and the screw hole seat and the screw seat are assembled and connected by bolts.

[0016] By adopting the above technical solution, the legs on the bottom of the material box support the material box at a certain height, which is convenient for the later disassembly and assembly of the supporting parts to add concrete samples. The screw seat on the bottom plate and the screw hole seat on the material box are fixed and assembled by bolts to ensure the stability of the bottom plate blocking the open end of the material box.

[0017] Optionally, the air intake member includes an air intake box, which is fixed on one end surface of the material holding box, and an air intake pipe is connected and fixed on the air intake box, and a screw cover is connected and fixed on the bottom end of the air intake pipe.

[0018] By adopting the above technical solution, the air intake box is used to introduce external air into the interior of the material holding box, and the air intake pipe on the air intake box is connected and fixed with a screw cover for later connection to the filter cartridge.

[0019] Optionally, a filter cartridge is vertically arranged on the screw cover, and both upper and lower ends of the filter cartridge are opened, a perforated plate is horizontally fixed on the inner bottom surface of the filter cartridge, and the interior of the filter cartridge is filled with filter cotton.

[0020] By adopting the above technical solution, the perforated plate and filter cotton provided in the filter cartridge are used to filter and remove dust and impurities in the air to ensure the cleanliness of the air.

[0021] Optionally, a screw ring is vertically connected and fixed to the top of the filter cartridge, and the screw ring is threadedly assembled on the screw cover.

[0022] By adopting the above technical solution, the screw ring on the filter cartridge is assembled and connected with the screw cover thread, which is convenient for later disassembly and replacement of the internal filter cotton.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: during use, a concrete sample mixed with denitrified fly ash is placed on a material support, which is then assembled in a material holding box, and then an absorption solution is added to the interior of the material holding container, and then an ammonia gas sensitive electrode is inserted into the absorption solution in the material holding container, and at the same time, a section of the air guide tube is connected and fixed to the top surface of the material holding box, and then the other end of the air guide tube is inserted into the absorption solution in the material holding container, and during measurement, the heating resistor is controlled to generate heat according to the temperature requirement of the measurement, and the temperature in the material holding box is measured using an electronic thermometer. After reaching the appropriate temperature, the air pump is started to drive the external air through the air inlet guide. The air is then introduced into the material box after contacting the concrete sample and then into the absorption solution from the air duct. After the ammonia in the air reacts with the absorption solution, the ammonia concentration reading is measured by the ammonia sensitive electrode and transmitted to the ammonia detector. Therefore, after the concrete sample air reacts with the absorption solution, the ammonia concentration can be quickly detected by the ammonia detector, thereby improving the accuracy of ammonia concentration detection. By adjusting the temperature, the influence of the temperature on the concentration law of ammonia volatilization is detected, which is conducive to the later detection of the influence of ammonia on concrete. At the same time, the measured ammonia concentration selects the amount of denitrification fly ash added to the concrete, thereby ensuring the environmental protection and durability of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 This is a schematic diagram of the structure of the embodiment of the present application in an exploded state;

[0026] Figure 3 This is a schematic structural diagram of the material holding box in the disassembled state according to an embodiment of the present application;

[0027] Figure 4 This is a schematic structural diagram of the air intake component in the decomposed state according to an embodiment of the present application;

[0028] Figure 5 It is a schematic structural diagram of the material support component in the disassembled state according to an embodiment of the present application.

[0029] Explanation of the accompanying reference numerals: 1. Material holding box; 11. Screw hole seat; 12. Material supporting piece; 121. Bottom plate; 122. Screw seat; 123. Screw barrel; 124. Stud; 125. Support box; 13. Heating resistor; 14. Air inlet piece; 141. Air inlet box; 142. Screw cover; 143. Filter cartridge; 144. Orifice plate; 145. Filter cotton; 146. Screw ring; 15. Electronic thermometer; 2. Material holding container; 21. Exhaust pipe; 3. Ammonia detector; 31. Ammonia sensitive electrode; 4. Air duct; 5. Air pump. DETAILED DESCRIPTION

[0030] The present application is further described in detail below with reference to the accompanying drawings.

[0031] The present application discloses a quantitative test device for ammonia nitrogen in fly ash. Figure 1 、 Figure 2 and Figure 3 A quantitative testing device for ammonia and nitrogen in fly ash comprises a material holding box 1, a material holding container 2 and an ammonia detector 3. The bottom surface of the material holding box 1 is open, and a material supporting part 12 is provided at the opening of the material holding box 1. An air inlet part 14 is connected to a vertical end surface of one side of the material holding box 1. A plurality of heating resistors 13 are vertically fixed on the inner wall of the material holding box 1. The model of the heating resistor 13 is LSD--HM-1532. An electronic thermometer 15 is fixed on the front surface of the material holding box 1. The model of the electronic thermometer 15 is HM-TS. An air duct 4 is connected and fixed, and an air pump 5 is assembled on the air duct 4. The interior of the material container 2 is filled with an absorption solution, which is a 0.05 mol / L H2SO4 solution. An ammonia sensitive electrode 31 is inserted into the absorption solution and fixed on the top surface of the material container 2, and an exhaust pipe 21 is vertically inserted through the top surface of the material container 2, and the ammonia sensitive electrode 31 is electrically connected to the input end of the ammonia detector 3 through a wire. The other end of the air duct 4 is inserted into the absorption solution of the material container 2. The model of the ammonia detector 3 is MHY-7265.

[0032] By adopting the above technical solution, during use, a concrete sample mixed with denitrified fly ash is placed on the support member 12, and then the support member 12 is assembled in the material holding box 1, and then the absorption solution is added to the interior of the material holding container 2, and then the ammonia sensitive electrode 31 is inserted into the absorption solution of the material holding container 2, and at the same time, a section of the air guide tube 4 is connected and fixed to the top surface of the material holding box 1, and then the other end of the air guide tube 4 is inserted into the absorption solution of the material holding container 2. When measuring, according to the temperature requirement of the measurement, the heating resistor 13 is controlled to generate heat, and the temperature in the material holding box 1 is measured according to the electronic thermometer 15. After reaching the appropriate temperature, the air pump 5 is started to drive the external air through the air inlet member 1 4 is introduced into the material holding box 1, and then the air contacts the concrete sample and is introduced into the absorption solution through the air guide tube 4. After the ammonia in the air reacts with the absorption solution, the ammonia concentration reading is transmitted to the ammonia detector 3 after being measured by the ammonia sensitive electrode 31. Therefore, after the concrete sample air reacts with the absorption solution, the ammonia concentration can be quickly detected by the ammonia detector 3, thereby improving the accuracy of ammonia concentration detection. By adjusting the temperature to detect the influence of temperature on the concentration law of ammonia volatilization, it is beneficial to detect the influence of ammonia on concrete in the later stage. At the same time, the measured ammonia concentration is selected to select the amount of denitrified fly ash added to the concrete, thereby ensuring the environmental protection and durability of the concrete.

[0033] Reference Figure 5The material supporting member 12 includes a bottom plate 121, which is arranged at the open end of the material holding box 1, and screw seats 122 are horizontally fixed on both sides of the bottom plate 121. The bottom plate 121 is used to seal the bottom open end of the material holding box 1, and the screw seats 122 on the bottom plate 121 are convenient for fixing and assembling at the bottom opening of the material holding box 1. A support box 125 is horizontally arranged above the bottom plate 121, and a stud 124 is vertically fixed on the bottom surface of the support box 125. The support box 125 is used to hold concrete samples, and the stud 124 at the bottom end of the support box 125 is used to adjust the height of the support box 125. A screw barrel 123 is vertically fixed on the top surface of the bottom plate 121, and the screw barrel 123 is threadedly assembled with the stud 124. The stud 124 spirally moves in the screw barrel 123, vertically supporting and adjusting the height of the support box 125, which is suitable for different concrete sample support height requirements. Multiple legs are vertically fixed to the bottom of the container 1, and screw holes 11 are horizontally fixed to the bottom of the vertical end surface of the container 1. The screw holes 11 and screw holes 122 are assembled and connected by bolts. The legs on the bottom of the container 1 support the container 1 at a certain height, facilitating the later disassembly and assembly of the support member 12 for the installation of additional concrete samples. The screw holes 122 on the bottom plate 121 are assembled with the screw holes 11 on the container 1 by bolts, ensuring the stability of the bottom plate 121 blocking the open end of the container 1.

[0034] Reference Figure 4 The air intake member 14 includes an air intake box 141, which is fixed on one end surface of the material holding box 1, and an air intake pipe is connected and fixed on the air intake box 141, and a screw cover 142 is connected and fixed at the bottom end of the air intake pipe. The air intake box 141 is used to introduce external air into the interior of the material holding box 1, and the air intake pipe on the air intake box 141 is connected and fixed with a screw cover 142 for later connection with a filter cartridge 143. A filter cartridge 143 is vertically arranged on the screw cover 142, and the upper and lower ends of the filter cartridge 143 are both opened. A perforated plate 144 is horizontally fixed to the inner bottom surface of the filter cartridge 143, and the interior of the filter cartridge 143 is filled with filter cotton 145. The perforated plate 144 and filter cotton 145 provided in the filter cartridge 143 are used to filter and remove dust and impurities in the air to ensure the cleanliness of the air. The top of the filter cartridge 143 is vertically connected and fixed with a screw ring 146, which is threadedly assembled on the screw cover 142. The screw ring 146 on the filter cartridge 143 is threadedly assembled with the screw cover 142, which is convenient for later disassembly and replacement of the internal filter cotton 145.

[0035] The implementation principle of the quantitative testing device for ammonia nitrogen in fly ash of the embodiment of the present application is as follows: during use, a concrete sample mixed with denitrified fly ash is placed on a material support 12, which is then assembled in a material holding box 1. An absorption solution is then added to the interior of the material holding container 2. An ammonia sensitive electrode 31 is then inserted into the absorption solution in the material holding container 2. At the same time, a section of an air duct 4 is connected and fixed to the top surface of the material holding box 1, and the other end of the air duct 4 is then inserted into the absorption solution in the material holding container 2. During measurement, the heating resistor 13 is controlled to generate heat according to the temperature requirement of the measurement, and the temperature in the material holding box 1 is measured by an electronic thermometer 15. After reaching the appropriate temperature, the air pump 5 is started to drive external air into the material holding box 1 through the air inlet 14. The air then contacts the concrete sample and is introduced into the absorption solution through the air duct 4. After the ammonia in the air reacts with the absorption solution, the ammonia concentration reading is measured by the ammonia sensitive electrode 31 and transmitted to the ammonia detector 3. In this way, the ammonia concentration can be quickly detected by the ammonia detector 3 after the concrete sample air reacts with the absorption solution.

[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A quantitative testing device for ammonia nitrogen in fly ash, characterized in that: The invention comprises a material holding box (1), a material holding container (2) and an ammonia detector (3), wherein the bottom surface of the material holding box (1) is provided with an opening, and a material supporting member (12) is provided at the opening of the material holding box (1), an air inlet member (14) is connected to a vertical end surface of one side of the material holding box (1), and a plurality of heating resistors (13) are vertically fixed on the inner wall of the material holding box (1), and an electronic thermometer (15) is fixed on the front end surface of the material holding box (1), and an air guide member (14) is vertically connected and fixed on the top surface of the material holding box (1). The gas pipe (4) is connected to the gas pump (5) and is assembled on the gas pipe (4). The interior of the material container (2) is filled with an absorption solution, and an ammonia sensitive electrode (31) is inserted into the absorption solution and fixed on the top surface of the material container (2). An exhaust pipe (21) is vertically inserted through the top surface of the material container (2), and the ammonia sensitive electrode (31) is electrically connected to the input end of the ammonia detector (3) through a wire. The other end of the gas pipe (4) is inserted into the absorption solution of the material container (2).

2. The quantitative testing device for ammonia nitrogen in fly ash according to claim 1, characterized in that: The material supporting member (12) comprises a bottom plate (121), the bottom plate (121) is arranged at the open end of the material holding box (1), and screw seats (122) are horizontally fixed on both sides of the bottom plate (121).

3. The quantitative testing device for ammonia nitrogen in fly ash according to claim 2, characterized in that: A support box (125) is horizontally arranged above the bottom plate (121), and a stud (124) is vertically fixed on the bottom surface of the support box (125).

4. The quantitative testing device for ammonia and nitrogen in fly ash according to claim 3, characterized in that: A screw barrel (123) is vertically fixed on the top surface of the bottom plate (121), and the screw barrel (123) is threadedly assembled with the stud (124).

5. The quantitative testing device for ammonia and nitrogen in fly ash according to claim 4, characterized in that: A plurality of legs are vertically fixed on the bottom surface of the material holding box (1), and a screw hole seat (11) is horizontally fixed on the bottom of the vertical end surface of the material holding box (1), and the screw hole seat (11) and the screw seat (122) are assembled and connected by bolts.

6. The quantitative testing device for ammonia and nitrogen in fly ash according to claim 5, characterized in that: The air intake member (14) comprises an air intake box (141), the air intake box (141) is fixed on one end surface of the material storage box (1), an air intake pipe is connected and fixed to the air intake box (141), and a screw cover (142) is connected and fixed to the bottom end of the air intake pipe.

7. The quantitative testing device for ammonia and nitrogen in fly ash according to claim 6, characterized in that: A filter cartridge (143) is vertically arranged on the screw cover (142), and both upper and lower ends of the filter cartridge (143) are opened. A perforated plate (144) is horizontally fixed to the inner bottom surface of the filter cartridge (143), and the interior of the filter cartridge (143) is filled with filter cotton (145).

8. The quantitative testing device for ammonia and nitrogen in fly ash according to claim 7, characterized in that: A screw ring (146) is vertically connected and fixed to the top end of the filter cartridge (143), and the screw ring (146) is threadedly assembled on the screw cover (142).

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