A testing device and method for quickly determining ammonia content in fly ash

Abstract

The present invention discloses a testing device and method for quickly determining the ammonia content of fly ash, comprising a distillation flask, a splash-proof water vapor separator, a condenser, a steam bottle and an alkali liquid reagent bottle connected to the distillation flask through a pipeline, wherein the splash-proof water vapor separator is arranged above the distillation flask and communicated with the distillation flask, the splash-proof water vapor separator is connected to the condenser through a pipeline, and a detection kit is arranged below the condenser for detecting the ammonia content of ammonia-containing test liquid. The present invention avoids a complicated titration process and simplifies the operation steps by using the detection kit to detect the ammonia-containing test liquid. In addition, the detection kit can realize batch production and long-term storage, avoids reagent preparation and calibration during the test process, shortens the test time, and thus improves the test efficiency, and can quickly realize the determination of the ammonia content range of fly ash.

Description

Technical Field

[0001] The invention relates to the technical field of building material detection, and in particular to a testing device and method for quickly determining the ammonia content of fly ash. Background Art

[0002] Fly ash is a byproduct of coal-fired power plants. It has long been used in cement, mortar and concrete products to reduce costs, increase efficiency and improve performance. It is an important cementitious material. In recent years, in order to respond to national environmental protection requirements and reduce the ammonia nitrogen substances emitted into the atmosphere by thermal power plants and other enterprises, coal-fired power plants have successively carried out denitration transformation of units. During the operation of SCR and SNCR, the use of ammonia to treat nitrogen oxides in flue gas causes the presence of ammonia nitrogen substances in fly ash. As a result, the fly ash after denitration transformation has a large number of bubbles accompanied by a pungent odor, a significant extension of the setting time or even no setting, the volume of concrete expands and even seriously expands the mold, the internal looseness and porosity and the strength decrease, causing the performance of cement concrete to deteriorate, seriously threatening the quality and safety of concrete structures and the safety of the construction environment.

[0003] Due to the diversity of chemical forms and physical bonding forms of ammonia nitrogen in fly ash, there are many difficulties in testing the ammonia nitrogen content in fly ash. The existing methods for testing the ammonia content in fly ash mainly include extracting ammonium ions by infiltration, filtration or centrifugal separation, formaldehyde method, distillation-titration method, Nessler reagent-spectrophotometer method, salicylic acid photometer, ion chromatography and other methods. However, the infiltration, filtration or centrifugal separation methods have the disadvantages of insufficient extraction and difficulty in avoiding Ca 2+ Mg 2+ The problem of interference from ions and gels; the formaldehyde method and distillation-titration method are not accurate enough and cannot meet the requirements of fly ash testing; the Nessler reagent-spectrophotometer method, salicylic acid photometer, ion chromatography and other methods are too accurate and have a narrow test range and are not suitable for fly ash ammonia testing. In addition, the above methods all have problems such as long test time, complex solution preparation, and cumbersome operation in the quantitative test process. Summary of the invention

[0004] In view of the above problems, the present invention provides a testing device and method for quickly determining the ammonia content of fly ash. In view of the shortcomings of the existing quantitative test of ammonia content in fly ash, the ammonia content of fly ash can be quickly detected and determined, providing a basis for quantitative control of ammonia content in out-of-stock fly ash and other building materials products.

[0005] The present invention adopts the following technical solutions:

[0006] A testing device for quickly determining the ammonia content of fly ash comprises a distillation flask, a splash-proof water vapor separator, a condenser, a steam bottle and an alkaline liquid reagent bottle connected to the distillation flask through a pipeline, the splash-proof water vapor separator is arranged above the distillation flask and communicated with the distillation flask, the splash-proof water vapor separator is connected to the condenser through a pipeline, and a detection reagent kit is arranged below the condenser for detecting the ammonia content of ammonia-containing test liquid.

[0007] Preferably, the testing device further comprises a capsule belt, on which capsule balls are arranged at equal intervals.

[0008] Preferably, the splash-proof water vapor separator comprises a hollow spherical cavity, the upper and lower ends of the cavity are respectively provided with a gas outlet and a gas inlet which are connected to the interior of the cavity, the lower end of the gas outlet extends into the interior of the cavity, and the lower end of the gas outlet is provided with an arc-shaped splash-proof baffle plate to prevent the reaction liquid from boiling over and entering the subsequent pipeline, thereby affecting the result; a gas through hole is provided at the connection between the gas outlet and the splash-proof baffle plate, and the condensed liquid can flow back to the distillation flask through the gas through hole, thereby forming a circulation loop of continuous distillation extraction and reflux reaction in the distillation flask and the splash-proof water vapor separator, thereby fully extracting the ammonia nitrogen substances in the fly ash.

[0009] Preferably, the detection kit includes a hollow box body, a detection chamber arranged inside the box body, a cover body is provided above the detection chamber, a conveying groove is provided on one side of the cover body, a liquid release groove is provided at one end of the conveying groove, the lower end of the liquid release groove is connected with the detection chamber through a pipeline, a puncturing device is provided above, and a discharge groove is provided on the right side of the upper end surface of the liquid release groove.

[0010] Preferably, the puncturing device includes a transmission motor fixed above the liquid release groove, a conveying turntable is provided below the transmission motor, the transmission motor drives the conveying turntable to rotate through a bearing, a fan-shaped notch is provided on the conveying turntable for placing the capsule ball, and a steel needle is provided on the groove wall of the liquid release groove for puncturing the capsule ball.

[0011] Preferably, an extrusion partition is provided between the conveying turntable and the inner wall of the liquid release groove for squeezing the punctured capsule balls, one end of the extrusion partition is connected to one end of the discharge groove, a stripping partition is provided on the groove wall of the discharge groove, one end of the stripping partition is close to the conveying turntable to prevent the capsule balls from being brought into the conveying groove, and the stripping partition strips off the empty capsule belt adhered to the conveying turntable.

[0012] Preferably, the cover body is provided with an ammonia through hole and a stirrer, the lower end of the condenser tube extends into the absorption liquid in the detection chamber through a pipeline, the absorption liquid absorbs ammonia, and the stirrer stirs the ammonia-containing test liquid in the detection chamber;

[0013] A drain pipe is provided at the lower end of the detection chamber for discharging the detection liquid after detection.

[0014] A testing method using a testing device for quickly determining the ammonia content of fly ash comprises the following steps:

[0015] S1. Seal and connect the test device, weigh a certain amount of fly ash into a distillation bottle, and rinse and soak it;

[0016] S2, a certain amount of absorption liquid is loaded into the detection chamber, an excess amount of alkaline reaction liquid is added to the distillation flask, and hot steam generated in the steam bottle is passed into the distillation flask to accelerate the reaction and distillation of ammonia;

[0017] S3, the distilled gas is separated by a splash-proof water vapor separator, cooled by a condenser, and then introduced into the absorption liquid at the bottom of the detection chamber to obtain an ammonia-containing test liquid;

[0018] S4. Start the detection kit, put the capsule belt into the puncture device, and quickly test the ammonia content range of the fly ash according to the color change of the ammonia-containing test liquid and the consumption of the capsule balls.

[0019] Preferably, the capsule ball is filled with 1.2-12 ml of a dilute hydrochloric acid reaction reagent with a concentration of 0.005-0.05 mol / L, 0.01-0.1 ml of a color indicator of a methyl red-methylene blue solution, and the mixed detection reagent is red, which can detect 50 / (M / 10)-100 / (M / 10) ppm of ammonia content in fly ash, where M is the mass of fly ash, g.

[0020] The alkaline reaction liquid is sodium hydroxide or potassium hydroxide, with a mass concentration of 5-50wt%, and the mass ratio of the alkaline reaction liquid to the fly ash sample is: (5-50): (10-30);

[0021] The absorption liquid is boric acid with a mass concentration of 1.5-4wt%, and the mass ratio of the absorption liquid to the fly ash sample is: (20-200): (10-30).

[0022] The beneficial effects of the present invention are:

[0023] 1. The present invention adopts a detection kit to detect the ammonia-containing test liquid, thereby avoiding a complicated titration process and simplifying the operation steps. In addition, the detection kit can be mass-produced and stored for a long time, avoiding the preparation and calibration of reagents in the test process, shortening the test time, thereby improving the test efficiency and being able to quickly determine the ammonia content range of fly ash.

[0024] 2. The present invention adopts excess alkali solution reaction and splash-proof separator to ensure the adequacy of extraction of ammonia nitrogen substances in fly ash and improve efficiency; the detection reagent in the capsule ball reacts directly with ammonium borate, the reaction is rapid, and the color development is sensitive, so there are fewer influencing factors, the reaction is sensitive, the data reliability is high, the test range is wide and the applicability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0026] Figure 1 It is a structural schematic diagram of the testing device of the present invention;

[0027] Figure 2 It is a perspective structural schematic diagram of the detection kit of the present invention;

[0028] Figure 3 is a top view of the detection kit of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the puncture device of the present invention (excluding the transmission motor);

[0030] Figure 5 It is a structural schematic diagram of the capsule belt of the present invention;

[0031] Figure 6 It is a schematic cross-sectional structure diagram of the splash-proof water vapor separator of the present invention;

[0032] As shown in the figure

[0033] 1—distillation flask, 2—steam bottle, 3—steam valve, 4—steam pipeline, 5—sealing plug, 6—alkali solution reagent bottle, 7—alkali solution pump, 8—alkali solution valve, 9—distillate gas pipeline, 10—splash-proof water vapor separator, 11—condenser, 12—condensate inlet, 13—condensate outlet, 14—anti-backflow check valve, 15—box body, 16—detection chamber, 17—cover body, 18—agitator, 19—ammonia through hole, 20—steel needle, 21—transmission trough, 22—transmission turntable, 23—peeling partition, 24—liquid release groove, 25—transmission motor, 26—liquid discharge pipe, 27—capsule belt, 28—squeezing partition, 29—discharge trough, 30—capsule ball;

[0034] 101 - splash shield, 102 - gas inlet, 103 - gas outlet, 104 - gas through hole, 105 - cavity. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "include" or "comprise" and the like used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0038] like Figures 1 to 6 As shown, a testing device for quickly determining the ammonia content of fly ash comprises a distillation flask 1, a splash-proof water vapor separator 10, and a condenser 11. The distillation flask 1 is sealed with a sealing plug 5 at its upper opening, and the sealing plug 5 is provided with a steam bottle 2 and an alkali solution reagent bottle 6 which are connected with the inside of the distillation flask 1 through a pipeline. The steam bottle 2 is a closed bottle body, and the body of the steam bottle 2 is heated by electricity or fuel or other heating methods outside, so that the distilled water in the steam bottle 2 generates steam, and the steam is introduced into the distillation flask 1 through a steam pipeline 4 to accelerate the reaction between the fly ash and the alkali solution and the distillation of ammonia. The steam pipeline 4 is provided with a steam valve 3 to facilitate the control of the amount of steam introduced;

[0039] An alkali pump 7 and an alkali valve 8 are provided on the pipeline between the alkali reagent bottle 6 and the steam bottle 2. During the test, the alkali in the alkali reagent bottle 6 is pumped into the distillation bottle 1 by the alkali pump 7 to react with the fly ash; the alkali liquid is sodium hydroxide or potassium hydroxide, and the mass concentration is 5-50wt%, and the mass ratio of the alkali liquid to the fly ash is: (5-50): (10-30).

[0040] The splash-proof water vapor separator 10 is arranged above the distillation flask 1 and is connected to the inside of the distillation flask 1 through the distilled gas pipeline 9. The splash-proof water vapor separator 10 is connected to the condenser 11 through a pipeline. The condenser 11 is provided with a condensed water inlet 12 and a condensed water outlet 13 for the entry and exit of condensed water. A detection kit is provided below the condenser 11 for detecting the ammonia content of the ammonia-containing test liquid.

[0041] The splash-proof separator 10 includes a hollow spherical cavity 105, wherein the upper and lower ends of the cavity 105 are respectively provided with a gas outlet 103 and a gas inlet 102 and are connected to the interior of the cavity 105, the lower end of the gas outlet 103 extends into the interior of the cavity 105, and the lower end of the gas outlet 103 is provided with an arc-shaped splash-proof baffle 101 to prevent the reaction liquid from boiling over into the subsequent pipeline and affecting the result, and a gas through hole 104 is provided at the connection between the gas outlet 103 and the splash-proof baffle 101, and the condensed liquid can flow back to the distillation flask 1 through the gas through hole 104, thereby forming a circulation loop of continuous distillation extraction and reflux reaction in the distillation flask 1 and the splash-proof separator 10, thereby fully extracting the ammonia nitrogen substance in the fly ash.

[0042] The detection kit comprises a hollow box body 15, a detection chamber 16 is arranged inside the box body 15, a cover body 17 is arranged on the end surface above the detection chamber 16, the cover body 17 is provided with an ammonia through hole 19 and an agitator 18, an absorption pipeline is arranged at the lower end of the condenser 11, an anti-backflow check valve 14 is arranged on the absorption pipeline to prevent the liquid in the pipeline from backflowing, the lower end of the absorption pipeline extends into the absorption liquid placed inside the detection chamber 16, the absorption liquid absorbs ammonia, and the agitator 18 stirs the ammonia-containing test liquid in the detection chamber 16;

[0043] The stirrer 18 includes a motor disposed on the cover 17, and the motor drives a stirring rod disposed inside the detection chamber 16 to rotate through a shaft. During the test, the stirring rod fully mixes the ammonia-containing test liquid with the reaction reagent in the capsule ball 30;

[0044] A liquid discharge pipe 26 is provided at the lower end of the detection chamber 16 for discharging the detection liquid after detection.

[0045] The box body 15 and the detection chamber 16 can be made of a transparent material such as polymethyl methacrylate, polystyrene, and polycarbonate, so that it is convenient to observe the color change of the ammonia-containing test liquid inside the detection chamber 16.

[0046] According to actual testing requirements, a certain amount of absorption liquid can be placed in the testing chamber 16 and then ammonia gas can be introduced to form an ammonia-containing test liquid, or the ammonia-containing test liquid can be directly placed in the testing chamber for testing.

[0047] A conveying groove 21 is provided on one side of the cover body 17 for placing the capsule belt 27, and a liquid releasing groove 24 is provided at one end of the conveying groove 21. As a preferred solution, the conveying groove 21 can be tilted on the upper end surface of the box body 15 (the end away from the liquid releasing groove 24 is higher);

[0048] The liquid release groove 24 is funnel-shaped, and its lower end is connected to the interior of the detection chamber 16 through a pipeline. A puncturing device is provided on the upper side. A discharge groove 29 is provided on the right side of the upper end surface of the liquid release groove 24. The capsule belt punctured by the puncturing device is discharged from the discharge groove 29.

[0049] The piercing device includes a transmission motor 25 fixed above the liquid releasing groove 24. The transmission motor 25 is fixed to the upper end surface of the box body 15 through a bracket. The transmission motor 25 is connected to the transmission turntable 22 arranged below the transmission motor 25 through an axis, thereby driving the transmission turntable 22 to rotate. A fan-shaped notch is provided on the transmission turntable 22 for positioning and clamping the capsule ball 30. The transmission turntable 22 rotates one circle to realize the transmission of one capsule ball. A steel needle 20 is provided on the groove wall of the liquid releasing groove 24 for piercing the capsule ball 30.

[0050] An extrusion partition 28 is provided between the conveying turntable 22 and the inner wall of the liquid releasing groove 24 for squeezing the capsule balls 30 punctured by the steel needle 20. The left end of the extrusion partition 28 is fixed on the groove wall of the liquid releasing groove 24, and the right end is connected to the left end of the discharge groove 29. The middle part is fixed on the groove wall of the liquid releasing groove 24 through a bracket. A stripping partition 23 is provided on the groove wall of the discharge groove 29. One end of the stripping partition 23 is close to the conveying turntable 22. The stripping partition 23 strips off the empty capsule belt 27 adhered to the conveying turntable 22.

[0051] The detection kit includes a power switch, which controls the opening and closing of the agitator 18 and the transmission motor 25 respectively. A controller is arranged between the power switch and the transmission motor 25. The transmission turntable 22 rotates one circle each time a button is pressed. The transmission motor 25 is a 42BYGHW hybrid stepping motor. The controller includes an 80C52 single-chip microcomputer, a driver chip UM2003, and a button (the prior art will not be described in detail, and the above components can be purchased on the market).

[0052] The capsule belt 27 is made of a corrosion-resistant plastic material that is insoluble in the ammonia-containing test liquid. Capsule balls 30 are arranged at equal intervals on the capsule belt 27, and the capsule balls 30 are connected by plastic belts.

[0053] The capsule ball 30 contains 6.0 ml of a dilute hydrochloric acid reagent with a concentration of 0.005 mol / L and 0.1 ml of a color indicator of a methyl red-methylene blue solution; or, the capsule ball 30 contains 3.0 ml of a dilute hydrochloric acid reagent with a concentration of 0.01 mol / L and 0.05 ml of a color indicator of a methyl red-methylene blue solution; the mixed detection reagent is red, and a single capsule ball 30 can detect 50 ppm of ammonia content in fly ash; when n capsule balls 30 are used, the ammonia content in fly ash between 50(n-1) / (M / 10)-50n / (M / 10) ppm can be detected, where M is the mass of fly ash, g;

[0054] The capsule ball 30 contains 1.2 ml of a dilute hydrochloric acid reaction reagent with a concentration of 0.05 mol / L and 0.01 ml of a color indicator of a methyl red-methylene blue solution; or, the capsule ball 30 contains 12 ml of a dilute hydrochloric acid reaction reagent with a concentration of 0.005 mol / L and 0.1 ml of a color indicator of a methyl red-methylene blue solution; the mixed detection reagent is red, and a single capsule ball 30 can detect 100 ppm of ammonia content in fly ash; when n capsule balls 30 are used, the ammonia content in fly ash between 100(n-1) / (M / 10)-100n / (M / 10) ppm can be detected, where M is the mass of fly ash, g;

[0055] When the capsule belt 27 is used, the plastic belt at the lower end of the capsule ball 30 is firstly wound around the conveying turntable 22 and led out from the discharge slot 29, at which time the capsule ball 30 is just in the fan-shaped notch;

[0056] During the conveying process, the capsule ball 30 is first punctured by the steel needle 20, and the punctured capsule ball 30 is squeezed between the conveying turntable 22 and the groove wall of the liquid releasing groove 24, and the reaction reagent in the capsule ball 30 is released into the liquid releasing groove 24 below, and finally flows into the detection chamber 16;

[0057] The arc-shaped extrusion partition 28 between the groove wall of the liquid release groove 24 and the conveying turntable 22 squeezes the residual reaction reagent in the capsule ball 30 again, and the cleanly squeezed capsule ball 30 enters the discharge groove 29 and is discharged under the obstruction of the stripping partition 23.

[0058] A testing method using a testing device for quickly determining the ammonia content of fly ash comprises the following steps:

[0059] S1. Seal and connect the test device, weigh the fly ash M with a mass of 10-30g, put it into the distillation flask 1, and rinse and soak it;

[0060] S2, loading a boric acid solution with a mass concentration of 1.5-4wt% into the detection chamber 16, adding a NaOH solution with a mass concentration of 5-50wt% into the distillation flask 1, and passing hot steam from the steam bottle 2 into the distillation flask 1 to accelerate the reaction and distillation of ammonia, and distill for 10 minutes;

[0061] S3, the distilled gas is separated by the splash-proof water vapor separator 10, cooled by the condenser 11, and then introduced into the boric acid solution in the detection chamber 16 to obtain the ammonia-containing test liquid;

[0062] S4, start the detection kit, put the capsule belt 27 (3 ml of dilute hydrochloric acid reaction reagent with a concentration of 0.01 mol / L, 0.05 ml of capsule ball of methyl red-methylene blue solution color indicator) into the puncturing device, and puncture a capsule ball 30 by rotating the conveying turntable 22 once. If the ammonia-containing test liquid turns light red and there is no color change when stirring, it means that the ammonia content of the fly ash is less than 50 / (M / 10) ppm;

[0063] If the pink color in the ammonia-containing test solution gradually fades until it turns into yellow-green, it means that the ammonia content of the fly ash is greater than 50 / (M / 10) ppm;

[0064] The capsule balls 30 are continuously punctured until the solution turns into light pink and does not change color within 1 minute. At this time, the number of the punctured capsule balls 30 is n, and the ammonia content of the fly ash ranges from 50(n-1) / (M / 10) to 50n / (M / 10) ppm.

[0065] According to the above operating steps, the ammonia content range of several fly ash was determined and compared with the precise quantitative results to verify the accuracy. The results are shown in Table 1.

[0066] Table 1 Fly ash ammonia content range test results

[0067]

[0068] As a preferred embodiment of the present invention, the prepared ammonia-containing test liquid can be directly placed in the detection chamber, and the ammonia concentration range of the ammonia-containing test liquid can be quickly obtained through the release amount of the capsule ball 30, thereby avoiding defects such as reagent preparation and calibration during the test, and long titration time; the detection kit can be mass-produced and stored for a long time, thereby improving the test efficiency.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A testing device for quickly determining the ammonia content of fly ash, characterized in that: The invention comprises a distillation flask (1), a splash-proof water vapor separator (10), a condenser (11), a steam bottle (2) and an alkali liquid reagent bottle (6) which are connected to the inside of the distillation flask (1) via a pipeline, wherein the distillation flask (1) has an upper opening sealed with a sealing plug (5); the splash-proof water vapor separator (10) is arranged above the distillation flask (1) and is connected to the inside of the distillation flask (1); the upper part of the splash-proof water vapor separator (10) is connected to the condenser (11) via a pipeline; and a detection reagent kit is arranged below the condenser (11); The detection kit comprises a hollow box body (15), a detection chamber (16) arranged inside the box body (15), a cover body (17) arranged above the detection chamber (16), a conveying groove (21) arranged on one side of the cover body (17), a liquid release groove (24) arranged at one end of the conveying groove (21), the lower end of the liquid release groove (24) being connected to the detection chamber (16), a puncturing device being arranged above, and a discharge groove (29) being arranged on the right side of the upper end surface of the liquid release groove (24).

2. A testing device for quickly determining the ammonia content of fly ash according to claim 1, characterized in that: It also comprises a capsule belt (27), on which capsule balls (30) are arranged at equal intervals.

3. A testing device for quickly determining the ammonia content of fly ash according to claim 2, characterized in that: The splash-proof water vapor separator (10) comprises a cavity (105), wherein the upper and lower ends of the cavity (105) are respectively provided with a gas outlet (103) and a gas inlet (102), wherein the gas outlet (103) extends into the interior of the cavity (105), a splash-proof baffle (101) is provided at the lower end, and a gas through hole (104) is provided at the connection between the gas outlet (103) and the splash-proof baffle (101).

4. A testing device for quickly determining the ammonia content of fly ash according to claim 1 or 2, characterized in that: The puncturing device comprises a transmission motor (25) fixed above the liquid releasing groove (24), a transmission turntable (22) is arranged below the transmission motor (25), the transmission motor (25) drives the transmission turntable (22) to rotate, and a steel needle (20) is arranged on the groove wall of the liquid releasing groove (24).

5. A testing device for quickly determining the ammonia content of fly ash according to claim 4, characterized in that: An extrusion partition (28) is provided between the conveying turntable (22) and the inner wall of the liquid releasing groove (24), one end of the extrusion partition (28) is connected to one end of the discharge groove (29), a stripping partition (23) is provided on the groove wall of the discharge groove (29), and one end of the stripping partition (23) is close to the conveying turntable (22).

6. A testing device for quickly determining the ammonia content of fly ash according to claim 1 or 2, characterized in that: The cover (17) is provided with an ammonia through hole (19) and a stirrer (18), and the lower end of the condenser (11) extends into the interior of the detection chamber (16) through a pipeline; A liquid discharge pipe (26) is provided at the lower end of the detection chamber (16).

7. A method for quickly determining the ammonia content of fly ash, using a test device for quickly determining the ammonia content of fly ash as claimed in any one of claims 2 to 6, characterized in that: The following steps are involved: S1. Seal and connect the test device, weigh a certain amount of fly ash, put it into the distillation bottle (1), and rinse and soak it; S2, a fixed amount of absorption liquid is loaded into the detection chamber (16), an excess amount of alkaline reaction liquid is added to the distillation flask (1), and hot steam generated in the steam bottle (2) is passed into the distillation flask (1) to accelerate the reaction and distillation of ammonia; S3, the distilled gas is separated by a splash-proof water vapor separator (10), cooled by a condenser (11), and then introduced into the absorption liquid at the bottom of the detection chamber (16) to obtain an ammonia-containing test liquid; S4, start the detection kit, put the capsule belt (27) into the puncture device, and quickly test the ammonia content range of the fly ash according to the color change of the ammonia-containing test liquid and the consumption of the capsule ball (30).

8. A method for rapidly determining ammonia content in fly ash according to claim 7, characterized in that: The capsule ball (30) contains 1.2-12 ml of a dilute hydrochloric acid reaction reagent with a concentration of 0.005-0.05 mol / L and 0.01-0.1 ml of a color indicator of a methyl red-methylene blue solution.

9. A method for rapidly determining ammonia content in fly ash according to claim 7, characterized in that: The alkaline reaction liquid is sodium hydroxide or potassium hydroxide, with a mass concentration of 5-50wt%, and the mass ratio of the alkaline reaction liquid to the fly ash sample is: (5-50): (10-30); The absorption liquid is boric acid, the mass concentration of which is 1.5-4wt%, and the mass ratio of the absorption liquid to the fly ash sample is: (20-200): (10-30).

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