A mercury capacity detection system and method suitable for fixed bed demercuration agents

Abstract

The present application relates to a kind of mercury capacity detection system and method suitable for fixed bed demercuration agent, belong to atmospheric pollution control technical field.Mercury capacity detection system suitable for fixed bed demercuration agent, comprising: including mercury vapor generation system, mixing system, adsorption system and detection system.Mercury capacity detection method suitable for fixed bed demercuration agent, comprising the following steps: S1: 0.2g-1.0g test sample is loaded into the adsorption reactor;S2: mercury vapor generator with mercury source is heated, then part of nitrogen is introduced into mercury vapor generator, then into primary mixing chamber, obtain pretreated mercury vapor;S3: another part of nitrogen is directly introduced into primary mixing chamber, and mixed with the pretreated mercury vapor in step S2 to obtain not completely mixed gas.Beneficial effect: detection cycle is short, easy to disassemble, facilitate experimental operation, and test precision is higher.

Description

Technical Field

[0001] This invention belongs to the field of air pollution control technology, specifically relating to a mercury capacity detection system and method suitable for fixed-bed mercury removal agents. Background Technology

[0002] Mercury is a highly toxic pollutant with migratory, volatile, and persistent properties, causing severe environmental pollution globally and constituting a global problem. Anthropogenic emissions are the primary source of atmospheric mercury pollution, with coal combustion, chemical, electronics, and metallurgy being the main emitting industries. Commonly used mercury removal methods include pre-combustion mercury removal, in-combustion mercury removal, and post-combustion mercury removal. Among post-combustion mercury removal technologies, activated carbon adsorbents have the most mature research and application. Whether using activated or non-activated carbon mercury removal agents, accurately and quickly reflecting their mercury removal capacity is of great significance to both production and user ends. Current detection methods have many problems in terms of instrumentation, detection cycle, and ease of operation, and urgently need improvement. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a mercury capacity detection system suitable for fixed-bed mercury removal agents, featuring a short detection cycle, easy disassembly, convenient experimental operation, and high testing accuracy.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A mercury capacity detection system suitable for fixed-bed mercury removal agents includes: a mercury vapor generation system, a mixing system, an adsorption system, and a detection system;

[0005] The mercury vapor generating system includes a nitrogen cylinder, a first heater, and a mercury vapor generator with a built-in mercury source.

[0006] The mixing system includes a primary mixing chamber and a secondary mixing chamber;

[0007] The adsorption system includes an adsorption reactor with a built-in mercury removal agent and a second heater.

[0008] The detection system includes a flue gas mercury analyzer and a computer;

[0009] The gas cylinder has a first outlet connected to the inlet of a mercury vapor generator via a pipe. The mercury vapor generator's outlet is connected to the first inlet of a primary mixing chamber via a pipe. The mercury vapor generator is located inside a first heater. The gas cylinder's second outlet is connected to the second inlet of the primary mixing chamber via a pipe. The primary mixing chamber's outlet is connected to the inlet of a secondary mixing chamber via a pipe. The secondary mixing chamber's first outlet is connected to the first detection terminal of a flue gas mercury analyzer via a pipe. The secondary mixing chamber's second outlet is connected to the inlet of an adsorption reactor via a pipe. The adsorption reactor's outlet is connected to the second detection terminal of the flue gas mercury analyzer via a pipe. The adsorption reactor is located inside a second heater. The flue gas mercury analyzer is electrically connected to a computer.

[0010] Beneficial effects: Short testing cycle, easy disassembly, convenient experimental operation, and high testing accuracy.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the mercury vapor generator includes a first U-shaped tube, with a first sealing plug at the top opening of the first U-shaped tube. A first air inlet pipe and a first air outlet pipe are respectively provided on the two side walls of the upper part of the first U-shaped tube. The first air inlet pipe is connected to the first air outlet of the gas cylinder, and the first air outlet pipe is connected to the first air inlet of the primary mixing chamber.

[0013] The beneficial effects of adopting the above-mentioned further scheme are: the mercury vapor generator is used to place the mercury source and facilitates the heating of the mercury source, thereby further determining the concentration of mercury vapor.

[0014] Furthermore, a porous baffle is provided at the inner bottom of the first U-shaped tube.

[0015] The beneficial effect of adopting the above-mentioned further solution is that it acts as a filter.

[0016] Furthermore, the adsorption reactor includes a second U-shaped tube, a second sealing plug is provided on the top opening of the second U-shaped tube, and a second air inlet pipe and a second air outlet pipe are respectively provided on the two side walls of the upper part of the second U-shaped tube. The second air inlet pipe is connected to the second air outlet of the secondary mixing chamber, and the second air outlet pipe is connected to the second detection end of the flue gas mercury analyzer.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that after the mercury removal agent in the adsorption reactor removes mercury, the mercury content in the gas is tested by a flue gas mercury analyzer.

[0018] Furthermore, a glass frit disc baffle is provided inside the second U-shaped tube.

[0019] The beneficial effect of adopting the above-mentioned further solution is that it acts as a filter.

[0020] Furthermore, it also includes an exhaust gas treatment system, the inlet of which is connected to the outlet of the flue gas mercury analyzer and the second outlet of the secondary mixing chamber, and the exhaust gas treatment system is a four-stage absorbent adsorption structure.

[0021] The beneficial effect of adopting the above-mentioned further solution is that it can centrally treat the mercury in the gas without causing environmental pollution.

[0022] To achieve the second objective mentioned above, this invention provides a mercury capacity detection method for fixed-bed mercury removal agents, employing the aforementioned mercury capacity detection system for fixed-bed mercury removal agents, comprising the following steps:

[0023] S1: Load 0.2g-1.0g of the test sample into the adsorption reactor;

[0024] S2: Heat the mercury vapor generator with a built-in mercury source, then introduce some nitrogen into the mercury vapor generator, and then into the primary mixing chamber to obtain pretreated mercury vapor;

[0025] S3: Another portion of nitrogen gas is directly introduced into the primary mixing chamber and mixed with the pretreated mercury vapor in step S2 to obtain an incompletely mixed gas;

[0026] S4: Pass the incompletely mixed gas from step S3 into the secondary mixing chamber to obtain a completely mixed gas;

[0027] S5: Pass the completely mixed gas from step S4 into an adsorption reactor containing a mercury removal agent and heat it.

[0028] S6: The mercury vapor concentration in the mixed gas after step S5 is detected and analyzed within the range of 200 μg / m3 ± 20 μg / m3. When the mercury vapor concentration at the outlet of the adsorption reactor reaches 10% of the concentration at the inlet of the adsorption reactor, the mercury capacity is calculated.

[0029] Beneficial effects: The detection method is simple. When the concentration of mercury vapor to be detected is within a certain range and stabilizes, the detection is carried out, and the detection data is accurate.

[0030] Furthermore, in step S2, the heating temperature is 20-100℃.

[0031] Furthermore, in step S5, the heating temperature is 20-100℃. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] Figure 2This is a schematic diagram of a mercury vapor generator.

[0034] Figure 3 This is a schematic diagram of the adsorption reactor.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Gas cylinder; 2. First heater; 3. Mercury vapor generator; 31. First U-tube; 32. First sealing plug; 33. First inlet pipe; 34. First outlet pipe; 35. Porous baffle; 4. Primary mixing chamber; 5. Secondary mixing chamber; 6. Adsorption reactor; 61. Second U-tube; 62. Second sealing plug; 63. Second inlet pipe; 64. Second outlet pipe; 65. Glass frit disc baffle; 7. Tail gas treatment system; 8. Second heater; 9. Computer; 10. Flue gas mercury analyzer. Detailed Implementation

[0037] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0038] like Figure 1-3 As shown, this embodiment provides a mercury capacity detection system suitable for fixed-bed mercury removal agents, including a mercury vapor generation system, a mixing system, an adsorption system, and a detection system;

[0039] The mercury vapor generating system includes a nitrogen cylinder 1, a first heater 2, and a mercury vapor generator 3 with a built-in mercury source;

[0040] The mixing system includes a primary mixing chamber 4 and a secondary mixing chamber 5;

[0041] The adsorption system includes an adsorption reactor 6 with a built-in mercury removal agent and a second heater 8.

[0042] The detection system includes a flue gas mercury analyzer 10 and a computer 9;

[0043] The first outlet of the gas cylinder 1 is connected to the inlet of the mercury vapor generator 3 via a pipe. The outlet of the mercury vapor generator 3 is connected to the first inlet of the primary mixing chamber 4 via a pipe. The mercury vapor generator 3 is located inside the first heater 2. The second outlet of the gas cylinder 1 is connected to the second inlet of the primary mixing chamber 4 via a pipe. The outlet of the primary mixing chamber 4 is connected to the inlet of the secondary mixing chamber 5 via a pipe. The first outlet of the secondary mixing chamber 5 is connected to the first detection end of the flue gas mercury analyzer 10 via a pipe. The second outlet of the secondary mixing chamber 5 is connected to the inlet of the adsorption reactor 6 via a pipe. The outlet of the adsorption reactor 6 is connected to the second detection end of the flue gas mercury analyzer 10 via a pipe. The adsorption reactor 6 is located inside the second heater 8. The flue gas mercury analyzer 10 is electrically connected to the computer 9.

[0044] In this embodiment, the mercury vapor generator 3 includes a first U-shaped tube 31. A first sealing plug 32 is provided on the top opening of the first U-shaped tube 31. A first air inlet pipe 33 and a first air outlet pipe 34 are respectively provided on the two side walls of the upper part of the first U-shaped tube 31. The first air inlet pipe 33 is connected to the first air outlet of the gas cylinder 1, and the first air outlet pipe 34 is connected to the first air inlet of the primary mixing chamber 4. The first U-shaped tube 31 is made of quartz. A porous partition 35 is provided at the bottom of the inner part. A quartz crossbeam is provided in the middle to connect and stabilize the left and right side tubes. The inner diameter of the first U-shaped tube 31 is 10mm. There is a branch pipe on each side, with a length of 30mm and an inner diameter of 6mm. The lower part of the branch pipe is 130mm from the bottom of the U-shaped tube, and the upper part of the branch pipe is 20mm from the top.

[0045] In this embodiment, the adsorption reactor 6 includes a second U-shaped tube 61. A second sealing plug 62 is provided on the top opening of the second U-shaped tube 61. A second air inlet pipe 63 and a second air outlet pipe 64 are respectively provided on the two side walls of the upper part of the second U-shaped tube 61. The second air inlet pipe 63 is connected to the second air outlet of the secondary mixing chamber 5, and the second air outlet pipe 64 is connected to the second detection end of the flue gas mercury analyzer 10. A glass frit disc baffle 65 is provided inside the second U-shaped tube 61. The material of the second U-shaped tube 61 is quartz. The inner diameter of the tube with the glass frit disc baffle 65 on one side of the adsorption reactor 6 is 17mm, and that on the other side it is 10mm. There is a branch pipe on each side, with a length of 30mm and an inner diameter of 6mm. The lower part of the branch pipe is 175mm from the bottom of the second U-shaped tube 61, and the upper part of the branch pipe is 40mm from the top. When using the adsorption reactor 6, 10ml of quartz sand is first put in, then the mercury removal agent is added, and after leveling, another 10ml of quartz sand is added.

[0046] In this embodiment, an exhaust gas treatment system 7 is also included. The air inlet of the exhaust gas treatment system 7 is connected to the air outlet of the flue gas mercury analyzer 10 and the second air outlet of the secondary mixing chamber 5. The exhaust gas treatment system 7 is a four-stage absorbent adsorption structure to avoid environmental pollution.

[0047] A method for detecting mercury capacity in fixed-bed mercury removal agents, employing the aforementioned mercury capacity detection system for fixed-bed mercury removal agents, includes the following steps:

[0048] S1: Load 0.2g-1.0g of the test sample into the adsorption reactor 6;

[0049] S2: Heat the mercury vapor generator 3, which has a built-in mercury source, to 20-100℃, then introduce some nitrogen gas into the mercury vapor generator 3, and then into the primary mixing chamber 4 to obtain pretreated mercury vapor;

[0050] S3: Another portion of nitrogen gas is directly introduced into the primary mixing chamber 4 and mixed with the pretreated mercury vapor in step S2 to obtain an incompletely mixed gas;

[0051] S4: Pass the incompletely mixed gas from step S3 into the secondary mixing chamber 5 to obtain a completely mixed gas;

[0052] S5: Pass the completely mixed gas from step S4 into the adsorption reactor 6 containing the mercury removal agent and heat it to 20-100℃.

[0053] S6: The mercury vapor concentration in the mixed gas after step S5 is detected and analyzed within the range of 200 μg / m3 ± 20 μg / m3. When the mercury vapor concentration at the outlet of adsorption reactor 6 reaches 10% of the concentration at the inlet of adsorption reactor 6, the mercury capacity is calculated.

[0054] Example 1:

[0055] First, a mercury removal agent A sample was ground to 40 mesh and dried at 105℃ for 2 hours. 0.5g of the sample was placed in an adsorption tube, filled with quartz sand to a certain height, and the tube was sealed. A nitrogen cylinder was opened, maintaining a total gas flow rate of 1000ml / min. 400ml / min of nitrogen flow entered the U-tube of the mercury vapor generator, while the remaining 600ml / min flow went directly into the primary mixing chamber. The water bath temperature of the mercury vapor generator was maintained at 60℃, carrying the mercury from the mercury source out as mercury vapor and into the primary mixing chamber. After two mixing stages (primary and secondary), the stabilized mercury vapor concentration reached 203μg / m³, which was then introduced into the adsorption reactor. At an adsorption temperature of 90℃, the gas adsorbed through the carbon layer entered the tail gas treatment system and was discharged after purification. The experiment was stopped when the mercury vapor concentration in the tail gas reached 20.3μg / m³. The calculated mercury capacity of mercury removal agent A was 1.22mg / g.

[0056] Example 2:

[0057] First, a mercury removal agent B sample was ground to 40 mesh and dried at 105℃ for 2 hours. 0.8g of the sample was placed in an adsorption tube, filled with quartz sand to a certain height, and the tube was sealed. A nitrogen cylinder was opened, maintaining a total gas flow rate of 1000ml / min. 400ml / min of nitrogen flow entered the U-tube of the mercury vapor generator, while the remaining 600ml / min flow went directly into the primary mixing chamber. The water bath temperature of the mercury vapor generator was maintained at 60℃, carrying the mercury from the mercury source out as mercury vapor and into the primary mixing chamber. After two mixing stages (primary and secondary), the stabilized mercury vapor concentration reached 197μg / m³, which was then introduced into the adsorption reactor. At an adsorption temperature of 90℃, the gas adsorbed through the carbon layer entered the tail gas treatment system and was discharged after purification. The experiment was stopped when the mercury vapor concentration in the tail gas reached 19.7μg / m³. The calculated mercury capacity of mercury removal agent B was 0.76mg / g.

[0058] Example 3:

[0059] First, a mercury removal agent C sample was ground to 40 mesh and dried at 105℃ for 2 hours. 0.2g of the sample was placed in an adsorption tube, filled with quartz sand at both ends to a certain height, and the tube was sealed. A nitrogen cylinder was opened, maintaining a total gas flow rate of 1000ml / min. 400ml / min of nitrogen flow entered the U-tube of the mercury vapor generator, while the remaining 600ml / min flow went directly into the primary mixing chamber. The water bath temperature of the mercury vapor generator was maintained at 60℃, carrying the mercury from the mercury source out as mercury vapor and into the primary mixing chamber. After two mixing stages (primary and secondary), the stabilized mercury vapor concentration reached 214μg / m³, which was then introduced into the adsorption reactor. At an adsorption temperature of 90℃, the gas adsorbed through the carbon layer entered the tail gas treatment system and was discharged after purification. The experiment was stopped when the mercury vapor concentration in the tail gas reached 21.4μg / m³. The calculated mercury capacity of mercury removal agent C was 3.27mg / g.

[0060] Example 4:

[0061] First, a mercury removal agent D sample was ground to 40 mesh and dried at 105℃ for 2 hours. 0.5g of the sample was placed in an adsorption tube, filled with quartz sand to a certain height, and the tube was sealed. A nitrogen cylinder was opened, maintaining a total gas flow rate of 1000ml / min. 400ml / min of nitrogen flow entered the U-tube of the mercury vapor generator, while the remaining 600ml / min flow went directly into the primary mixing chamber. The water bath temperature of the mercury vapor generator was maintained at 60℃, carrying the mercury from the mercury source out as mercury vapor and into the primary mixing chamber. After two mixing stages (primary and secondary), the stabilized mercury vapor concentration reached 204μg / m³, which was then introduced into the adsorption reactor. At an adsorption temperature of 90℃, the gas adsorbed through the carbon layer entered the tail gas treatment system and was discharged after purification. The experiment was stopped when the mercury vapor concentration in the tail gas reached 20.4μg / m³. The calculated mercury capacity of mercury removal agent D was 1.13mg / g.

[0062] Example 5:

[0063] First, a mercury removal agent E sample was ground to 40 mesh and dried at 105℃ for 2 hours. 0.2g of the sample was placed in an adsorption tube, filled with quartz sand to a certain height, and the tube was sealed. A nitrogen cylinder was opened, maintaining a total gas flow rate of 1000ml / min. 400ml / min of nitrogen flow entered the U-tube of the mercury vapor generator, while the remaining 600ml / min flow went directly into the primary mixing chamber. The water bath temperature of the mercury vapor generator was maintained at 60℃, carrying the mercury from the mercury source out as mercury vapor and into the primary mixing chamber. After two mixing stages (primary and secondary), the stabilized mercury vapor concentration reached 209μg / m³, which was then introduced into the adsorption reactor. At an adsorption temperature of 90℃, the gas adsorbed through the carbon layer entered the tail gas treatment system and was discharged after purification. The experiment was stopped when the mercury vapor concentration in the tail gas reached 20.9μg / m³. The calculated mercury capacity of mercury removal agent E was 2.92mg / g.

[0064] Example 6:

[0065] First, a sample of mercury removal agent F was ground to 40 mesh and dried at 105℃ for 2 hours. 0.5g of the sample was placed in an adsorption tube, filled with quartz sand at both ends to a certain height, and the tube was sealed. A nitrogen cylinder was opened, maintaining a total gas flow rate of 1000ml / min. 400ml / min of nitrogen flow entered the U-tube of the mercury vapor generator, while the remaining 600ml / min flow went directly into the primary mixing chamber. The water bath temperature of the mercury vapor generator was maintained at 60℃, carrying the mercury from the mercury source out as mercury vapor and into the primary mixing chamber. After two mixing stages (primary and secondary), the stabilized mercury vapor concentration reached 189μg / m³, which was then introduced into the adsorption reactor. At an adsorption temperature of 90℃, the gas adsorbed through the carbon layer entered the tail gas treatment system and was discharged after purification. The experiment was stopped when the mercury vapor concentration in the tail gas reached 18.9μg / m³. The calculated mercury capacity of mercury removal agent F was 0.94mg / g.

[0066] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mercury capacity detection system suitable for fixed-bed mercury removal agents, characterized in that, This includes a mercury vapor generation system, a mixing system, an adsorption system, and a detection system; The mercury vapor generating system includes a nitrogen cylinder (1), a first heater (2), and a mercury vapor generator (3) with a built-in mercury source. The mixing system includes a primary mixing chamber (4) and a secondary mixing chamber (5); The adsorption system includes an adsorption reactor (6) with a built-in mercury removal agent and a second heater (8). The detection system includes a flue gas mercury analyzer (10) and a computer (9). The first outlet of the gas cylinder (1) is connected to the inlet of the mercury vapor generator (3) via a pipe. The outlet of the mercury vapor generator (3) is connected to the first inlet of the primary mixing chamber (4) via a pipe. The mercury vapor generator (3) is located inside the first heater (2). The second outlet of the gas cylinder (1) is connected to the second inlet of the primary mixing chamber (4) via a pipe. The outlet of the primary mixing chamber (4) is connected to the inlet of the secondary mixing chamber (5) via a pipe. The first outlet of the secondary mixing chamber (5) is connected to the first detection end of the flue gas mercury analyzer (10) via a pipe. The second outlet of the secondary mixing chamber (5) is connected to the inlet of the adsorption reactor (6) via a pipe. The outlet of the adsorption reactor (6) is connected to the flue gas mercury analyzer (10) via a pipe. The adsorption reactor (6) is located inside the second heater (8), and the flue gas mercury analyzer (10) is electrically connected to the computer (9). The adsorption reactor (6) includes a second U-shaped tube (61), and a second sealing plug (62) is provided on the top opening of the second U-shaped tube (61). A second air inlet pipe (63) and a second air outlet pipe (64) are respectively provided on the two side walls of the upper part of the second U-shaped tube (61). The second air inlet pipe (63) is connected to the second air outlet of the secondary mixing chamber (5), and the second air outlet pipe (64) is connected to the second detection end of the flue gas mercury analyzer (10). A glass frit disc partition (65) is provided inside the second U-shaped tube (61). The diameters of the left and right sides of the second U-shaped tube (61) are different, and the glass frit disc partition (65) is provided on the side with the larger diameter.

2. The mercury capacity detection system for fixed-bed mercury removal agents according to claim 1, characterized in that, The mercury vapor generator (3) includes a first U-shaped tube (31), a first sealing plug (32) is provided on the top opening of the first U-shaped tube (31), a first air inlet pipe (33) and a first air outlet pipe (34) are respectively provided on the two side walls of the upper part of the first U-shaped tube (31), the first air inlet pipe (33) is connected to the first air outlet of the gas cylinder (1), and the first air outlet pipe (34) is connected to the first air inlet of the primary mixing chamber (4).

3. The mercury capacity detection system for fixed-bed mercury removal agents according to claim 2, characterized in that, The inner bottom of the first U-shaped tube (31) is provided with a porous partition (35).

4. The mercury capacity detection system for fixed-bed mercury removal agents according to claim 1, characterized in that, It also includes an exhaust gas treatment system (7), the air inlet of which is connected to the air outlet of the flue gas mercury analyzer (10) and the second air outlet of the secondary mixing chamber (5), respectively. The exhaust gas treatment system (7) is a four-stage absorbent adsorption structure.

5. A method for detecting the mercury capacity of a fixed-bed mercury removal agent, comprising the mercury capacity detection system for a fixed-bed mercury removal agent as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: Load 0.2g-1.0g of the test sample into the adsorption reactor (6); S2: Heat the mercury vapor generator (3) with a built-in mercury source, then introduce some nitrogen into the mercury vapor generator (3), and then into the primary mixing chamber (4) to obtain pretreated mercury vapor; S3: Another portion of nitrogen gas is directly introduced into the primary mixing chamber (4) and mixed with the pretreated mercury vapor in step S2 to obtain an incompletely mixed gas; S4: Pass the incompletely mixed gas from step S3 into the secondary mixing chamber (5) to obtain a completely mixed gas; S5: The completely mixed gas from step S4 is passed into an adsorption reactor (6) containing a mercury removal agent and heated. S6: The mercury vapor concentration in the mixed gas after step S5 is 200 μg / m³. 3 ±20μg / m 3 Within the range of detection and analysis, when the mercury vapor concentration at the outlet of the adsorption reactor (6) reaches 10% of the concentration at the inlet of the adsorption reactor (6), the mercury capacity is calculated.

6. The method for detecting mercury capacity of a fixed-bed mercury removal agent according to claim 5, characterized in that, In step S2, the heating temperature is 20-100℃.

7. The method for detecting mercury capacity of a fixed-bed mercury removal agent according to claim 5, characterized in that, In step S5, the heating temperature is 20-100℃.

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