A kind of ammonium bisulfate generation experimental device and method

Abstract

The present invention provides an ammonium bisulfate generation experimental device and method, the purpose of which is to achieve stable generation of ammonium bisulfate, accurate metering, and simulate the influence of fly ash in flue gas on the generation of ammonium bisulfate. It includes a gas phase gas distribution device, a liquid phase injection device, a reaction device and a solid phase ash adding device; the gas phase gas distribution device includes a nitrogen generator, an ammonia generator, an electronic flow controller, a gas mixing chamber and a temperature control device; wherein the nitrogen generator and the ammonia generator are connected to the corresponding gas path inlet of the electronic flow controller, and the gas mixing chamber is placed in the temperature control device; the liquid phase injection device includes a liquid storage tank and a liquid delivery pipe; the reaction device includes a reactor, a high temperature heating device and a second temperature measuring element; the reactor part is located in the high temperature heating device, the other end of the liquid delivery pipe extends into the constant temperature section of the reactor, the gas outlet of the gas mixing chamber is connected to the reactor inlet, and the second temperature measuring element is arranged in the reactor; the solid phase ash adding device includes a feeder, which is arranged on the solid phase ash adding pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas simulation experiments, and in particular to an ammonium bisulfate generation experimental device and method. Background Art

[0002] SCR denitrification technology is currently widely used in environmental protection devices for thermal power units. Common SCR denitrification devices adopt a low-dust layout. However, in the actual operation of power plants, due to limitations in the denitrification flow field and ammonia injection control, a certain amount of ammonia escapes from the denitrification outlet. This part of ammonia reacts with SO2 and H2O in the flue gas to generate viscous ammonium bisulfate, which leads to significant ash accumulation and increased resistance on the flue gas side of the downstream air preheater, affecting the stable operation of the equipment and posing a major hidden danger. In addition, in the study of low-load denitrification and the SO2 resistance of medium and low catalysts, more and more researchers have realized the importance of medium and low temperature research and development, and the research on the resistance to sulfate deposition. Therefore, studying the formation mechanism of ammonium bisulfate will help solve the ash blockage problem of ultra-low emission denitrification air preheaters and the development of medium and low temperature catalyst products.

[0003] In the existing experiments on the characteristics of ammonium bisulfate generation, the main problems are as follows:

[0004] (1) Without ammonium bisulfate standard gas, quantitative research is difficult to achieve.

[0005] (2) The dew point temperature of ammonium bisulfate is relatively high, about 300°C, which is difficult to achieve by conventional water bath heating or high temperature heating.

[0006] (3) Existing ammonium bisulfate generation experiments are all obtained through a ternary gas phase reaction of ammonia, sulfur trioxide and water vapor, and the stable and accurate generation of sulfur trioxide in the reactants is itself a difficult problem.

[0007] (4) Existing ammonium bisulfate generation experiments are all pure gas, but in actual production, fly ash has a great influence on the generation of ammonium bisulfate. The study of fly ash content on the generation of ammonium bisulfate is also meaningful. Summary of the invention

[0008] In order to solve the problems existing in the prior art, the present invention provides an ammonium bisulfate generation experimental device and method, the purpose of which is to achieve stable generation of ammonium bisulfate, accurate metering, and simulate the influence of fly ash in flue gas on the generation of ammonium bisulfate.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] An ammonium bisulfate generation experimental device comprises a gas phase gas distribution device, a liquid phase injection device, a reaction device and a solid phase ash adding device;

[0011] The gas phase gas distribution device comprises a nitrogen generator, an ammonia generator, an electronic flow controller, a gas mixing chamber and a temperature control device; wherein the nitrogen generator and the ammonia generator are respectively connected to the corresponding gas path inlets of the electronic flow controller through gas paths, the gas path outlet of the electronic flow controller is connected to the gas path of the gas inlet of the gas mixing chamber, and the gas mixing chamber is placed in the temperature control device;

[0012] The liquid phase injection device comprises a liquid storage tank and a liquid delivery pipe, one end of the liquid delivery pipe is connected to the outlet liquid phase pipeline of the liquid storage tank;

[0013] The reaction device comprises a reactor, a high-temperature heating device and a second temperature measuring element; the reactor part is located in the high-temperature heating device, the other end of the liquid delivery pipe is connected to the liquid phase pipeline at the reactor inlet and extends into the constant temperature section of the reactor, the gas outlet of the gas mixing chamber is connected to the reactor inlet through the solid phase ash adding pipeline, and the second temperature measuring element is arranged in the reactor;

[0014] The solid phase ash adding device comprises a feeder, which is arranged on the solid phase ash adding pipeline.

[0015] Preferably, the high-temperature heating device is provided with a glass observation hole.

[0016] Preferably, a plurality of second temperature measuring elements are arranged at intervals along the length direction of the reactor.

[0017] Preferably, the high-temperature heating device is a high-temperature electric furnace, and the temperature control device is a constant-temperature water bath.

[0018] Preferably, the inlet and outlet of the reactor are respectively provided with rubber stoppers.

[0019] Preferably, the gas circuit adopts a polytetrafluoroethylene pipeline, the liquid phase pipeline adopts a corrosion-resistant material pipeline, and the solid phase ash adding pipeline adopts a stainless steel pipeline.

[0020] Preferably, the feeder is a screw feeder, and the liquid transmission tube is a capillary quartz tube.

[0021] Preferably, it also includes a tail gas treatment device, which contains alkaline solution for treating tail gas.

[0022] An ammonium bisulfate generation experimental method comprises the following steps:

[0023] S1. Inject nitrogen into the nitrogen generator and adjust the temperature of the temperature control equipment to preheat the mixing chamber;

[0024] S2, after the constant temperature section of the high-temperature heating device is controlled to reach a preset constant temperature, ammonia is injected into the ammonia generator, and the flow rate of the injected ammonia is controlled by an electronic flow controller. The liquid storage tank injects sulfuric acid into the reactor through a liquid delivery pipe, and sulfuric acid is vaporized to obtain sulfur trioxide. Sulfur trioxide and ammonia react in the reactor to generate ammonium bisulfate. The formation of ammonium bisulfate is observed through a glass observation hole provided in the high-temperature heating device. If the formation of ammonium bisulfate is not observed, the temperature of the constant temperature section is gradually reduced from the preset constant temperature according to the calibration gradient temperature △T, and S2 is repeated until the formation of ammonium bisulfate is observed, and the second temperature measuring element at the formation position of ammonium bisulfate measures the initial generation temperature T0;

[0025] S3, control the temperature of the constant temperature section of the high temperature heating device to T0+△T, inject ammonia and sulfuric acid with the same concentration as S2, and repeat S2 to measure the generation temperature T1 at the formation position of ammonium bisulfate;

[0026] S4, compare the temperatures of T1 and T0;

[0027] If the deviation is within the threshold range, then T1 is the ammonium bisulfate generation temperature T at the injected ammonia and sulfuric acid concentrations;

[0028] Otherwise, repeat S3 and S4 until the generated temperature T N The last measured generation temperature T N-1 The deviation is within the threshold range, N is a natural number greater than zero, then the generated temperature T N That is, the ammonium bisulfate generation temperature T under the injected ammonia and sulfuric acid concentration.

[0029] Preferably, before S1, the method further includes opening a feeder, injecting fly ash particles, repeating S1-S4, and measuring the ammonium bisulfate generation temperature T* under the simulated condition of injecting fly ash.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The invention provides an ammonium bisulfate generation experimental device, comprising a gas phase gas distribution device, a liquid phase injection device and a solid phase ash adding device; ammonia is injected through an ammonia generator in the gas phase gas distribution device and sulfuric acid is injected through a liquid storage tank filled with a dilute sulfuric acid solution with a certain configuration concentration in the liquid phase injection device, and the two are contacted and reacted in a constant temperature section of a reactor to generate ammonium bisulfate, thereby ensuring the stable generation of ammonium bisulfate; in addition, the dew point temperature of ammonium bisulfate is relatively high, and a high temperature heating device is provided to create high temperature reaction conditions, thereby ensuring that the sulfuric acid solution entering the reactor can stably and accurately generate sulfur trioxide gas; a nitrogen generator is provided to introduce nitrogen in advance to ensure the gas in the device is in a stable state; a temperature control device is provided to preheat the reaction gas in advance and play a role in balancing the pressure; and a solid phase ash adding device is provided to truly simulate the influence of fly ash particles in flue gas on the generation of ammonium bisulfate under actual conditions.

[0032] Furthermore, a glass observation hole is provided on the high-temperature heating device, and the second temperature measuring element is arranged at eight measuring points at intervals along the length direction of the reactor, which can observe the generation process of ammonium bisulfate, help to more accurately determine the generation temperature of ammonium bisulfate, and check the temperature distribution in the high-temperature heating device in real time.

[0033] Furthermore, one end of the liquid delivery pipe connected to the reactor inlet extends into the constant temperature section. Since the inlet temperature of the reactor is relatively low, ammonia and sulfuric acid contact and react at the inlet, which will affect the vaporization of sulfuric acid into sulfur trioxide gas and affect experimental observations.

[0034] Furthermore, the present invention includes a tail gas treatment device, which is connected to the reactor outlet through a liquid phase pipeline, including a water tank filled with alkali solution. Since ammonium bisulfate is an acidic gas and is toxic, it will cause air pollution if it is directly discharged after the reaction is completed. Therefore, alkali solution is used for absorption and the tail gas is treated by neutralization reaction.

[0035] The present invention provides an iterative method for measuring the temperature of ammonium bisulfate generation, and uses a second temperature measuring element with eight measuring points to calibrate the temperature distribution inside the electric furnace. In actual measurement, the temperature field distribution inside the electric furnace shows a distribution law of "high in the middle and low at both ends". The temperature drop gradient at the outlet of the quartz tube is large, sometimes exceeding 20°C. If ammonium bisulfate is generated at this position, it is difficult to accurately obtain the generation temperature. For this reason, the iterative method can be used to preliminarily obtain the generation temperature range of ammonium bisulfate at a specific concentration, thereby controlling the generation of ammonium bisulfate at the rear section of the quartz tube (where the temperature drop gradient of the electric furnace is small). BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of an ammonium bisulfate generation experimental device of the present invention.

[0037] In the figure, an ammonia generator 1, a manual flow controller 2, an electronic flow controller 3, a flow display controller 4, a gas mixing chamber 5, a temperature control device 6, a feeder 7, a liquid storage tank 8, a corrosion-resistant flow meter 9, a liquid delivery pipe 10, a high-temperature heating device 11, a reactor 12, a water tank 13, a first temperature measuring element 14, a second temperature measuring element 15, and a nitrogen generator 16. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0039] like Figure 1 As shown, an ammonium bisulfate generation experimental device includes a gas phase gas distribution device, a liquid phase injection device and a solid phase ash adding device; the gas phase gas distribution device includes a nitrogen generator 16, an ammonia generator 1, a manual flow controller 2, an electronic flow controller 3, a flow display controller 4, a mixing chamber 5 and a temperature control device 6; wherein the nitrogen generator 16 is connected to the manual flow controller 2 through a gas path, the manual flow controller 2 is connected to the nitrogen gas path inlet of the electronic flow controller 3 through a gas path, the ammonia generator 1 is connected to the manual flow controller 2 through a gas path, the manual flow controller 2 is connected to the ammonia gas path inlet of the electronic flow controller 3 through a gas path, the signal output end of the electronic flow controller 3 is connected to the flow display controller 4 through a gas path, the nitrogen gas path outlet is connected to the nitrogen gas inlet gas path of the mixing chamber 5, the ammonia gas path outlet is connected to the ammonia gas inlet gas path of the mixing chamber 5, and the mixing chamber 5 is placed in the temperature control device 6;

[0040] The liquid phase injection device includes a liquid storage tank 8, a corrosion-resistant flow meter 9 and a liquid delivery pipe 10; a sulfuric acid solution is placed in the liquid storage tank 8, and its outlet is connected to the input end of the corrosion-resistant flow meter 9 through a liquid phase pipeline, and one end of the liquid delivery pipe 10 is connected to the liquid phase pipeline at the output end of the corrosion-resistant flow meter 9;

[0041] The reaction device includes a reactor 12, a high-temperature heating device 11 and a second temperature measuring element 15; the reactor 12 is partially located in the high-temperature heating device, and the part for generating ammonium bisulfate is the reaction section. The other end of the liquid delivery pipe 10 is connected to the liquid phase pipeline at the inlet of the reactor 12 and extends into the constant temperature section of the reactor 12. The gas outlet of the gas mixing chamber 5 is connected to the inlet of the reactor 12 through a solid phase ash adding pipeline, and the pipeline extends into the interior of the reactor 12. The second temperature measuring element 15 is provided with a temperature display, and the second temperature measuring element 15 is located in the reactor 12;

[0042] The solid phase ash adding device comprises a feeder 7 and a first temperature measuring element 14 , which is arranged on the solid phase ash adding pipeline. A temperature display is arranged on the first temperature measuring element 14 .

[0043] The present invention provides an ammonium bisulfate generation experimental device, wherein nitrogen is injected through a nitrogen generator 16 in a gas phase gas distribution device, a manual flow controller 2 connected thereto is adjusted to a suitable pressure, nitrogen is introduced for a period of time, and the remaining excess air in the pipeline is removed to ensure that the gas in the pipeline is in a stable state, and the presence of other gases in the air does not affect the reaction; by setting a temperature control device 6, the gas in a gas mixing chamber 5 can be preheated in advance, and the setting of the temperature control device 6 can play a role in balancing the pressure, wherein, although the gas in the gas mixing chamber 5 is preheated, the heating temperature is not sufficient, and the gas entering the reactor 12 after preheating will affect the temperature distribution in the high-temperature heating device 11. Therefore, in the experiment, it is necessary to first pass nitrogen for a period of time, and wait until the temperature distribution in the high-temperature heating device 11 is stabilized and reaches a constant temperature before the next step of the experiment is carried out.

[0044] The present invention injects ammonia through an ammonia generator 1 in a gas phase gas distribution device, injects sulfuric acid through a liquid storage tank 8 filled with a sulfuric acid solution of a certain configuration concentration in a liquid phase injection device, and the liquid phase pipeline directly extends into the constant temperature section of the reactor 12. The two are in contact and react in the constant temperature section of the reactor 12 to generate ammonium bisulfate. Since the dew point temperature of ammonium bisulfate is relatively high, a high-temperature heating device 11 is provided to create high-temperature reaction conditions, which can ensure that the sulfuric acid solution entering the reactor 12 can stably and accurately generate sulfur trioxide gas.

[0045] The present invention is also provided with a solid phase ash adding device, which can truly simulate the influence of fly ash particles in the flue gas on the generation of ammonium bisulfate under actual conditions through the feeder 7. Among them, because the generated ammonium bisulfate is viscous, in order to avoid the adhesion of ammonium bisulfate and fly ash and blockage of the experimental pipeline system, fly ash particles with smaller particle size should be selected, and preferably 0.1 μm in this embodiment.

[0046] Furthermore, a glass observation hole is provided on the high-temperature heating device 11 for observing the generation process of ammonium bisulfate, which helps to more accurately determine the generation temperature of ammonium bisulfate.

[0047] Furthermore, a plurality of second temperature measuring elements 15 are arranged at intervals along the length direction of the reactor 12. Since ammonium bisulfate is sensitive to temperature, a plurality of measuring points are set in the reaction section to check the temperature distribution in the high-temperature heating device 11, so as to adjust the temperature in the furnace in time without affecting the vaporization of sulfuric acid to produce sulfur trioxide gas and the formation reaction of ammonium bisulfate.

[0048] Furthermore, one end of the liquid delivery pipe 10 connected to the inlet of the reactor 12 extends into the constant temperature section. Since the inlet temperature of the reactor 12 is relatively low, ammonia gas and sulfuric acid contact and react directly at the inlet, resulting in the reaction not occurring in the constant temperature section with a glass observation hole, affecting the observation of the formation process of ammonium bisulfate. At the same time, low temperature will also affect the vaporization of sulfuric acid into sulfur trioxide gas, making it impossible to achieve accurate generation of sulfur trioxide gas and truly simulate the flue gas experiment.

[0049] Furthermore, the inlet and outlet of the reactor 12 are respectively provided with rubber plugs to prevent outside air from flowing in and reacting with the gas in the reactor, thereby ensuring that the reaction is carried out without being doped by outside impurities.

[0050] Furthermore, the gas circuit adopts polytetrafluoroethylene pipeline. Polytetrafluoroethylene has excellent chemical stability, can withstand all strong acids, strong alkalis, and strong oxidants, and does not react with various organic solvents. It also has a wide operating temperature range and can be used to transport highly corrosive gases and liquids at high temperatures. The liquid phase pipeline adopts corrosion-resistant material pipelines. Since sulfuric acid liquid is corrosive, corrosion-resistant material pipelines are used to transport the liquid. The solid phase ash adding pipeline adopts stainless steel pipeline, which has excellent mechanical properties, has the characteristics of high strength and high hardness, and is resistant to high temperature and corrosion and not easy to rust.

[0051] Furthermore, copper pipes are used for the liquid phase pipelines.

[0052] Furthermore, it also includes a tail gas treatment device, which contains alkaline solution for treating tail gas and is connected to the outlet of the reactor 12 through a liquid phase pipeline. Since ammonium bisulfate is an acidic gas and is toxic, it will cause air pollution if it is directly discharged after the reaction is completed. Because alkaline solution is used for absorption, the tail gas is treated through a neutralization reaction.

[0053] The present invention provides an ammonium bisulfate generation experimental method, specifically an experimental method for measuring the generation temperature of ammonium bisulfate, comprising the following steps:

[0054] S1. Prepare a dilute sulfuric acid solution of a certain concentration according to the generation components of ammonium bisulfate, and determine the appropriate ammonia standard gas concentration;

[0055] The sulfuric acid solution is loaded into the liquid storage tank 8, the nitrogen generator 16 is started to inject nitrogen, the manual flow controller 2 is adjusted to a suitable pressure, and the temperature of the temperature control device 6 is adjusted to a suitable temperature to preheat the gas mixing chamber 5 in advance;

[0056] S2, after the constant temperature section of the high temperature heating device 11 is controlled to reach the preset constant temperature, the ammonia generator 1 is turned on to inject ammonia, the flow rate of the injected ammonia is controlled by the electronic flow controller 3, the liquid storage tank 8 injects sulfuric acid into the reactor 12 through the liquid delivery pipe 10, the sulfuric acid is vaporized to obtain sulfur trioxide, the sulfur trioxide and ammonia in the reactor 12 react to generate ammonium bisulfate, the formation of ammonium bisulfate is observed through the glass observation hole provided in the high temperature heating device 11, if the formation of ammonium bisulfate is not observed, the temperature of the constant temperature section is gradually reduced from the preset constant temperature according to the calibration gradient temperature △T, and S2 is repeated until the formation of ammonium bisulfate is observed, and the second temperature measuring element 15 at the formation position of ammonium bisulfate and the temperature display thereon measure and display to obtain the initial generation temperature T0;

[0057] S3, controlling the temperature of the constant temperature section of the high temperature heating device 11 to T0+ΔT, injecting ammonia and sulfuric acid with the same concentration as S2, repeating S2, and measuring the generation temperature T1 at the formation position of ammonium bisulfate through the second temperature measuring element 15 and the temperature display thereon;

[0058] S4, compare the temperatures of T1 and T0;

[0059] If the deviation is within the threshold range, then T1 is the ammonium bisulfate generation temperature T at the injected ammonia and sulfuric acid concentrations;

[0060] Otherwise, repeat S3 and S4 until the generated temperature T N The generation temperature T obtained last time N-1 If the deviation is within the threshold range (N is a natural number greater than zero), the generated temperature T N That is, the ammonium bisulfate generation temperature T under the injected ammonia and sulfuric acid concentration;

[0061] S5. After the experiment is over, first turn off the corrosion-resistant flowmeter 9 of the liquid phase injection device, then turn off the feeder 7 and the ammonia generator 1 in sequence, and turn off the nitrogen generator 16 after nitrogen purging for a period of time, and the experiment is completed.

[0062] Furthermore, before S1, the method further includes opening the feeder 7, injecting fly ash particles, repeating S1-S4, and measuring the ammonium bisulfate generation temperature T* under the simulated condition of injecting fly ash.

[0063] Furthermore, the preset constant temperature range is 300-350°C, the calibration gradient temperature ΔT range is 5-10°C, and the threshold range is 5-10°C; when the preset constant temperature range of the present invention is set between 300-350°C, the formation of ammonium bisulfate can be seen, and the iterative steps are less.

[0064] Furthermore, the electronic flow controller 3 measures the ammonia flow rate as q1 and the nitrogen flow rate as q, and the corrosion-resistant flow meter 9 measures the sulfuric acid flow rate as q2, thereby obtaining the ammonia concentration and the sulfuric acid concentration respectively:

[0065]

[0066]

[0067] Furthermore, after the ammonium bisulfate generation experiment is completed, the generated tail gas is treated by a water tank 13 filled with alkali solution in the tail gas treatment device. The mass concentration of the alkali solution in the water tank 13 is 10%-40%. The absorption rate of ammonium bisulfate will increase with the increase of pH value. If the concentration is too low, it cannot be absorbed completely, but if the concentration of the alkali solution is too high, it will cause alkali waste. Therefore, alkali solution with a mass concentration of 10%-40% is selected to absorb ammonium bisulfate.

[0068] Example 1

[0069] The spiral feeder was turned on to simulate the experiment of introducing fly ash. Fly ash particles with a particle size of 0.1 μm were selected for simulation. The sulfuric acid solution was loaded into the liquid storage tank. The manual valve of the nitrogen high-pressure gas cylinder was opened, and the pressure difference of the pressure reducing valve was set to 0.5 MPa. The gas flow was first roughly adjusted through the manual valve of the nitrogen high-pressure gas cylinder, and then further fine-tuned through the electronic flow controller. The temperature of the constant temperature water bath where the mixing cylinder was located was controlled to 50°C, and the mixing cylinder was preheated. After the constant temperature section of the high-temperature electric furnace reached the preset constant temperature of 350°C±10°C and the temperature distribution was stable, the manual valve of the ammonia high-pressure gas cylinder was opened again, and sulfuric acid solution was injected to observe the generation of ammonium bisulfate in the quartz tube reactor. At the same time, eight second thermocouples were arranged at intervals along the length direction of the reactor, with an interval of about 10 mm. The second thermocouple measured the initial generation temperature, and the temperature of the constant temperature section of the high-temperature electric furnace was increased again. The above operation was repeated, and the generation temperature of ammonium bisulfate was obtained after multiple iterations.

[0070] The tail gas treatment device in this embodiment 1 is a water tank filled with alkali solution, wherein the mass concentration of the alkali solution is about 20%.

Claims

1. An experimental method for generating ammonium bisulfate, characterized in that: Based on the ammonium bisulfate generation experimental device, the device includes a gas phase gas distribution device, a liquid phase injection device, a reaction device and a solid phase ash adding device; The gas phase gas distribution device comprises a nitrogen generator (16), an ammonia generator (1), an electronic flow controller (3), a gas mixing chamber (5) and a temperature control device (6); wherein the nitrogen generator (16) and the ammonia generator (1) are respectively connected to corresponding gas path inlets of the electronic flow controller (3) through gas paths, the gas path outlet of the electronic flow controller (3) is connected to the gas path of the gas inlet of the gas mixing chamber (5), and the gas mixing chamber (5) is placed in the temperature control device (6); The liquid phase injection device comprises a liquid storage tank (8) and a liquid delivery pipe (10), one end of the liquid delivery pipe (10) being connected to an outlet liquid phase pipeline of the liquid storage tank (8); The reaction device comprises a reactor (12), a high-temperature heating device (11) and a second temperature measuring element (15); the reactor (12) is partially located in the high-temperature heating device (11); the other end of the liquid delivery pipe (10) is connected to the liquid phase pipeline at the inlet of the reactor (12) and extends into the constant temperature section of the reactor (12); the gas outlet of the gas mixing chamber (5) is connected to the inlet of the reactor (12) via a solid phase ash adding pipeline; and the second temperature measuring element (15) is arranged in the reactor (12); The solid phase ash adding device comprises a feeder (7) which is arranged on the solid phase ash adding pipeline; The method comprises the following steps: S1, nitrogen is injected into the nitrogen generator (16), and the temperature of the temperature control device (6) is adjusted to preheat the gas mixing chamber (5); S2, after the constant temperature section of the high temperature heating device (11) reaches a preset constant temperature, ammonia is injected into the ammonia generator (1), and the flow rate of the injected ammonia is controlled by the electronic flow controller (3). The liquid storage tank (8) injects sulfuric acid into the reactor (12) through the liquid delivery pipe (10), and the sulfuric acid is vaporized to obtain sulfur trioxide. The sulfur trioxide and ammonia react in the reactor (12) to generate ammonium bisulfate. The formation of ammonium bisulfate is observed through the glass observation hole provided in the high temperature heating device (11). If the formation of ammonium bisulfate is not observed, the temperature of the constant temperature section is gradually reduced from the preset constant temperature according to the calibration gradient temperature △T, and S2 is repeated until the formation of ammonium bisulfate is observed. The second temperature measuring element (15) at the formation position of ammonium bisulfate measures the initial generation temperature T0; S3, controlling the temperature of the constant temperature section of the high temperature heating device (11) to T0+△T, injecting ammonia and sulfuric acid with the same concentration as S2, and repeating S2 to measure the generation temperature T1 at the formation position of ammonium bisulfate; S4, compare the temperatures of T1 and T0; If the deviation is within the threshold range, then T1 is the ammonium bisulfate generation temperature T at the injected ammonia and sulfuric acid concentrations; Otherwise, repeat S3 and S4 until the generated temperature T N The last measured generation temperature T N-1 The deviation is within the threshold range, N is a natural number greater than zero, then the generated temperature T N That is, the ammonium bisulfate generation temperature T under the injected ammonia and sulfuric acid concentration.

2. The ammonium bisulfate generation experimental method according to claim 1, characterized in that: Before S1, the process further includes opening the feeder (7), injecting fly ash particles, repeating S1-S4, and measuring the ammonium bisulfate generation temperature T* under the simulated conditions of injecting fly ash.

3. An ammonium bisulfate generation experimental method according to claim 1, characterized in that: The high-temperature heating device (11) is provided with a glass observation hole.

4. The ammonium bisulfate generation experimental method according to claim 1, characterized in that: A plurality of second temperature measuring elements (15) are arranged at intervals along the length direction of the reactor (12).

5. The ammonium bisulfate generation experimental method according to claim 1, characterized in that: The high-temperature heating device (11) adopts a high-temperature electric furnace, and the temperature control device (6) adopts a constant-temperature water bath.

6. The ammonium bisulfate generation experimental method according to claim 1, characterized in that: The inlet and outlet of the reactor (12) are respectively provided with rubber stoppers.

7. The ammonium bisulfate generation experimental method according to claim 1, characterized in that: The gas circuit adopts a polytetrafluoroethylene pipeline, the liquid phase pipeline adopts a corrosion-resistant material pipeline, and the solid phase ash adding pipeline adopts a stainless steel pipeline.

8. The method for producing ammonium bisulfate according to claim 1, characterized in that: The feeder (7) is a screw feeder, and the liquid transmission tube (10) is a capillary quartz tube.

9. The ammonium bisulfate generation experimental method according to claim 1, characterized in that: The invention also comprises a tail gas treatment device, which contains alkali solution for treating the tail gas.

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