AU2021101463A4 - Apparatus and method for testing mercury removal efficiency of adsorbent - Google Patents
Apparatus and method for testing mercury removal efficiency of adsorbent Download PDFInfo
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- AU2021101463A4 AU2021101463A4 AU2021101463A AU2021101463A AU2021101463A4 AU 2021101463 A4 AU2021101463 A4 AU 2021101463A4 AU 2021101463 A AU2021101463 A AU 2021101463A AU 2021101463 A AU2021101463 A AU 2021101463A AU 2021101463 A4 AU2021101463 A4 AU 2021101463A4
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- mercury
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- adsorbent
- mercury removal
- gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0866—Sorption
Abstract
The present invention discloses an apparatus and method for testing mercury removal
efficiency of an adsorbent. The apparatus includes: an air compressor is respectively
connected to an air preheater and a micro-screw feeder, and a nitrogen container is connected
to a mercury generator; a premixing chamber is respectively connected to the mercury
generator, the air preheater and a mixing pipeline; the micro-screw feeder is respectively
connected to a sealed feed bin and an injection port, and the injection port is penetrated into
the mixing pipeline; and a bag dust collector is respectively connected to the mixing pipeline
and an adsorption drum; and the method includes the steps of: heating one part of a
high-speed airflow through the air preheater and supplying the heated airflow to the
premixing chamber; releasing nitrogen through the nitrogen container to serve as
mercury-carrying gas to convey gaseous mercury in the mercury generator to the premixing
chamber; conveying a mercury removal adsorbent to the injection port through one part of the
high-speed airflow for a mercury removal process; and performing treatment by using the bag
dust collector and an activated carbon column. The apparatus and method can effectively
simulate the mercury removal process, can monitor morphological and concentration changes
of the mercury in the mercury removal process in real time, and can provide the experimental
basis for research on a dynamic mercury removal characteristic of the adsorbent.
12
FIG. 1
1/1
Description
FIG. 1
1/1
[0001] The present invention belongs to the technical field of environment-friendly
depollution and flue gas mercury removal, and particularly relates to an apparatus and
method for testing mercury removal efficiency of an adsorbent.
[0002] As the fourth-largest pollutant of fuel coal next to dust, SOx and NOx, the
heavy metal of mercury has the characteristics of nerve hypertoxicity, bioaccumulation,
invisibility, latency and the like, and poses severe hazards to the natural environment and the
health of human beings. The combustion of coal is the main source of artificial mercury
emission in the atmosphere. At present, the energy structure in China still focuses on the coal.
Based on the energy utilization structure in China as well as the refractoriness and persistence
of the haze problem, the mercury emission reduction of the fuel coal is not only a part
inseparable from the overall goal of "ultra-low emission" of thermal power plants in China,
but also an indispensable and important part to reduce hazards of the haze. Hence, to research
and develop efficient and economic mercury removal technologies for coal-fired power plants
to implement near zero emission of gaseous elemental mercury in coal-fired flue gas is the
only way to treat the atmospheric mercury pollution of the fuel coal and improve the
environmental quality.
[0003] All kinds of mercury removal adsorbents have the advantages due to different
physicochemical properties and adsorption mechanisms. Among them, the activated carbon is
the most widely used mercury removal adsorbent because of the stable chemical property,
large specific surface area, good pore structure and good surface property. However, due to
the intrinsic nonselective adsorption property of the activated carbon, other components in
the flue gas seize the active center easily to reduce the utilization rate of the adsorbent.
Moreover, the flue activated carbon injection technology has a large usage amount of
adsorbent, and the expensive raw material cost reduces the industrial applicability. The flyash from the coal-fired power plants has a small particle size, contains the carbon, has abundant pore structures and surface properties and is rich in various metal compounds and mineral components that can catalytically oxidize the mercury for adsorption, and thus is extensively researched as a potential efficient mercury removal adsorbent. Therefore, the research and development of cheap and efficient mercury removal adsorbents with extensive sources are always the hotspot in the field of mercury pollution control research of the coal-fired flue gas.
[0004] For the above-mentioned problems in the prior art, the present invention
provides an apparatus for testing mercury removal efficiency of an adsorbent. The apparatus
can effectively simulate the mercury removal process, can monitor morphological and
concentration changes of the mercury in the mercury removal process in real time, and can
provide the experimental basis for research on a dynamic mercury removal characteristic of
the adsorbent. The method has simple steps and low implementation cost, and can provide a
theoretical basis for research on mercury removal technologies.
[0005] To achieve the above-mentioned objective, the present invention provides an
apparatus for testing mercury removal efficiency of an adsorbent, which includes an air
compressor, a nitrogen container, a mercury analyzer and a computer, wherein
[0006] a gas outlet of the air compressor is respectively connected to a gas inlet end
of a first conveying pipeline and a gas inlet end of a second conveying pipeline, a gas outlet
end of the first conveying pipeline is connected to a gas inlet of an air preheater, and a gas
outlet of the air preheater is connected to a gas inlet of a premixing chamber through an
exhaust pipeline; a gas outlet end of the second conveying pipeline is connected to a gas inlet
of a micro-screw feeder, a feed port of the micro-screw feeder communicates with a
discharge end of a sealed feed bin, and a to-be-tested mercury removal adsorbent is provided
in the sealed feed bin; and a discharge port of the micro-screw feeder is connected to a feed
end of an injection port, and a discharge end of the injection port is penetrated into a cavity at
an upstream side of a mixing pipeline;
[0007] a gas outlet of the nitrogen container is connected to a gas inlet end of a
mercury generator through a pipeline, and a gas outlet end of the mercury generator is connected to the gas inlet of the premixing chamber through a pipeline; and a gas outlet of the premixing chamber is connected to a gas inlet end of the mixing pipeline, multiple sampling pipelines communicating with the cavity of the mixing pipeline are uniformly connected on the mixing pipeline along a length direction, a gas outlet end of the mixing pipeline is connected to a gas inlet of a bag dust collector, a gas outlet of the bag dust collector is connected to a gas inlet of an adsorption drum through a pipeline, a gas outlet of the adsorption drum communicates with atmosphere, and an activated carbon column is filled in the adsorption drum;
[0008] multiple sampling ends of the mercury analyzer respectively and
correspondingly communicate with the multiple sampling pipelines; and
[0009] the computer is connected to the mercury analyzer.
[0010] In order to improve the mercury removal effect, the mixing pipeline is a
continuously bent elbow.
[0011] Further, in order to better simulate the temperature of flue gas generated in the
coal firing process, the air preheater has a heating temperature range of 150-160°C.
[0012] Preferably, a flowmeter, a flow control valve and a temperature sensor are
arranged on the exhaust pipeline.
[0013] Preferably, the mercury analyzer is a VM3000 mercury analyzer.
[0014] In the present invention, the air compressor is respectively connected to the air
preheater and the micro-screw feeder through the first and second conveying pipelines, which
may not only provide the power for the supply of the hot air, but also provide the power for
filling of the mercury removal adsorbent; and the nitrogen is taken as the carrying gas to
convey mercury generated by the mercury generator to the premixing chamber and mixed
with the air heated by the air preheater, such that the simulated flue gas can be generated
more authentically and effectively. With the arrangement of the multiple sampling pipelines,
mercury analyzer and computer, the morphology and concentration of the mercury at each
sampling point can be monitored in real time, thereby obtaining the dynamic mercury
removal characteristic of the adsorbent conveniently and quickly.
[0015] The present invention further provides a method for testing mercury removal
efficiency of an adsorbent, which includes the following steps:
[0016] step 1: turning on an air compressor and an air preheater, compressing outside
air into a high-speed airflow by using the air compressor, and dividing the high-speed airflow
into two parts; and heating one part of the high-speed airflow through the air preheater to
form hot air and supplying the hot air to a premixing chamber; and
[0017] meanwhile, releasing nitrogen through a nitrogen container to serve as
mercury-carrying gas to convey gaseous mercury in a mercury generator to the premixing
chamber, and mixing the nitrogen with the hot air to form simulated flue gas;
[0018] step 2: conveying the other part of the high-speed airflow to a micro-screw
feeder, and conveying a mercury removal adsorbent in a sealed feed bin to an injection port,
the mercury removal adsorbent being injected to a cavity of a mixing pipeline through the
injection port, and mixed with the simulated flue gas entering the mixing pipeline for a
mercury removal process;
[0019] step 3: supplying mixed gas containing solid particles after the mercury
removal to a bag dust collector for dust removal; and
[0020] step 4: supplying mixed gas subjected to the dust removal to an adsorption
drum, and removing unadsorbed gaseous mercury through an activated carbon column.
[0021] Preferably, in step 2, morphological and concentration data of the mercury in
sampling pipelines at different positions on the mixing pipeline are collected by a mercury
analyzer in real time, the data is sent to a computer, and the computer obtains a dynamic
mercury removal characteristic of the adsorbent through the received data.
[0022] The method has simple steps and low implementation cost, can conveniently
research flue gas components, mercury concentration and other influence rules on mercury
removal of the adsorbent through data collection, can conveniently monitor the dynamic
mercury removal characteristic of the adsorbent in real time to provide data supports for
research and development of various mercury removal adsorbents, and facilitates
optimization on process parameters.
[0023] FIG. 1 is a structural schematic diagram according to the present invention.
[0024] In the figure: 1. air compressor, 2. air preheater, 3. nitrogen container, 4.
mercury generator, 5. premixing chamber, 6. sealed feed bin, 7. micro-screw feeder, 8.
injection port, 9. mixing pipeline, 10. sampling pipeline, 11. mercury analyzer, 12. computer,
13. bag dust collector, 14. adsorption drum, 15. first conveying pipeline, 16. second
conveying pipeline, and 17. exhaust pipeline.
[0025] The present invention will be further described below in conjunction with the
accompanying drawings.
[0026] As shown in FIG. 1, an apparatus for testing mercury removal efficiency of an
adsorbent includes an air compressor 1, a nitrogen container 3, a mercury analyzer 11 and a
computer 12.
[0027] A gas outlet of the air compressor 1 is respectively connected to a gas inlet end
of a first conveying pipeline 15 and a gas inlet end of a second conveying pipeline 16, a gas
outlet end of the first conveying pipeline 15 is connected to a gas inlet of an air preheater 2,
and a gas outlet of the air preheater 2 is connected to a gas inlet of a premixing chamber 5
through an exhaust pipeline 17; a gas outlet end of the second conveying pipeline 16 is
connected to a gas inlet of a micro-screw feeder 7, a feed port of the micro-screw feeder 7
communicates with a discharge end of a sealed feed bin 6, and a to-be-tested mercury
removal adsorbent is provided in the sealed feed bin 6; and a discharge port of the
micro-screw feeder 7 is connected to a feed end of an injection port 8, and a discharge end of
the injection port 8 is penetrated into a cavity at an upstream side of a mixing pipeline 9.
[0028] Highly concentrated nitrogen is filled in the nitrogen container 3, a gas outlet
of the nitrogen container 3 is connected to a gas inlet end of a mercury generator 4 through a
pipeline, and a gas outlet end of the mercury generator 4 is connected to the gas inlet of the
premixing chamber 5 through a pipeline; and a gas outlet of the premixing chamber 5 is
connected to a gas inlet end of the mixing pipeline 9, multiple sampling pipelines 10
communicating with the cavity of the mixing pipeline are uniformly connected on the mixing
pipeline 9 along a length direction, a gas outlet end of the mixing pipeline 9 is connected to a
gas inlet of a bag dust collector 13, a gas outlet of the bag dust collector 13 is connected to a
gas inlet of an adsorption drum 14 through a pipeline, a gas outlet of the adsorption drum 14 communicates with atmosphere, and an activated carbon column is filled in the adsorption drum 14.
[0029] In order to better monitor morphological and concentration changes of the
mercury in the mixing pipeline, the multiple sampling pipelines 10 include one sampling
pipeline 10 located at the injection port 8, and further include one sampling pipeline 10
located at the gas outlet end of the mixing pipeline 9.
[0030] Preferably, the content of mercury in the gas generated by the mercury
generator 4 is 9-23 19/I, such that the content of mercury in the coal-fired flue gas may be
better simulated.
[0031] Multiple sampling ends of the mercury analyzer 11 respectively and
correspondingly communicate with the multiple sampling pipelines 10.
[0032] The computer 12 is connected to the mercury analyzer 11.
[0033] In order to improve the mercury removal effect, the mixing pipeline 9 is a
continuously bent elbow.
[0034] Further, in order to better simulate the temperature of flue gas generated in the
coal firing process, the air preheater 2 has a heating temperature range of 150-160°C.
[0035] Preferably, a flowmeter, a flow control valve and a temperature sensor are
arranged on the exhaust pipeline 17.
[0036] Preferably, the mercury analyzer 11 is a VM3000 mercury analyzer.
[0037] In the present invention, the air compressor is respectively connected to the air
preheater and the micro-screw feeder through the first and second conveying pipelines, which
may not only provide the power for the supply of the hot air, but also provide the power for
filling of the mercury removal adsorbent; and the nitrogen is taken as the carrying gas to
convey mercury generated by the mercury generator to the premixing chamber and mixed
with the air heated by the air preheater, such that the simulated flue gas can be generated
more authentically and effectively. With the arrangement of the multiple sampling pipelines,
mercury analyzer and computer, the morphology and concentration of the mercury at each
sampling point can be monitored in real time, thereby obtaining the dynamic mercury
removal characteristic of the adsorbent conveniently and quickly.
[0038] The present invention further provides a method for testing mercury removal
efficiency of an adsorbent, which includes the following steps:
[0039] Step 1: an air compressor 1 and an air preheater 2 are turned on, outside air is
compressed into a high-speed airflow by using the air compressor 1, and the high-speed
airflow is divided into two parts; and one part of the high-speed airflow is heated through the
air preheater 2 to form hot air and the hot air is supplied to a premixing chamber 5.
[0040] Preferably, the flow of the hot air preheated by the air preheater 2 is controlled
at 58 L/min by a flow control valve.
[0041] Meanwhile, nitrogen is released through a nitrogen container 3 to serve as
mercury-carrying gas to convey gaseous mercury in a mercury generator 4 to the premixing
chamber 5, and mixed with the hot air to form simulated flue gas.
[0042] Step 2: the other part of the high-speed airflow is conveyed to a micro-screw
feeder 7, and a mercury removal adsorbent in a sealed feed bin 6 is conveyed to an injection
port 8, the mercury removal adsorbent being injected to a cavity of a mixing pipeline 9
through the injection port 8, and mixed with the simulated flue gas entering the mixing
pipeline 9 for a mercury removal process.
[0043] Step 3: mixed gas containing solid particles after the mercury removal is
supplied to a bag dust collector 13 for dust removal.
[0044] Step 4: mixed gas subjected to the dust removal is supplied to an adsorption
drum 14, and unadsorbed gaseous mercury is removed through an activated carbon column.
[0045] Preferably, in step 2, morphological and concentration data of the mercury in
sampling pipelines 10 at different positions on the mixing pipeline 9 are collected by a
mercury analyzer 11 in real time, the data is sent to a computer 12, and the computer 12
obtains a dynamic mercury removal characteristic of the adsorbent through the received data.
[0046] The method has simple steps and low implementation cost, can conveniently
research flue gas components, mercury concentration and other influence rules on mercury
removal of the adsorbent through data collection, can conveniently monitor the dynamic
mercury removal characteristic of the adsorbent in real time to provide data supports for
research and development of various mercury removal adsorbents, and facilitates
optimization on process parameters.
Claims (6)
1. An apparatus for testing mercury removal efficiency of an adsorbent, comprising an
air compressor, a nitrogen container, a mercury analyzer and a computer, wherein
a gas outlet of the air compressor is respectively connected to a gas inlet end of a first
conveying pipeline and a gas inlet end of a second conveying pipeline, a gas outlet end of the
first conveying pipeline is connected to a gas inlet of an air preheater, and a gas outlet of the
air preheater is connected to a gas inlet of a premixing chamber through an exhaust pipeline;
a gas outlet end of the second conveying pipeline is connected to a gas inlet of a micro-screw
feeder, a feed port of the micro-screw feeder communicates with a discharge end of a sealed
feed bin, and a to-be-tested mercury removal adsorbent is provided in the sealed feed bin; and
a discharge port of the micro-screw feeder is connected to a feed end of an injection port, and
a discharge end of the injection port is penetrated into a cavity at an upstream side of a
mixing pipeline;
a gas outlet of the nitrogen container is connected to a gas inlet end of a mercury
generator through a pipeline, and a gas outlet end of the mercury generator is connected to
the gas inlet of the premixing chamber through a pipeline; and a gas outlet of the premixing
chamber is connected to a gas inlet end of the mixing pipeline, multiple sampling pipelines
communicating with the cavity of the mixing pipeline are uniformly connected on the mixing
pipeline along a length direction, a gas outlet end of the mixing pipeline is connected to a gas
inlet of a bag dust collector, a gas outlet of the bag dust collector is connected to a gas inlet of
an adsorption drum through a pipeline, a gas outlet of the adsorption drum communicates
with atmosphere, and an activated carbon column is filled in the adsorption drum;
multiple sampling ends of the mercury analyzer respectively and correspondingly
communicate with the multiple sampling pipelines; and
the computer is connected to the mercury analyzer.
2. The apparatus for testing the mercury removal efficiency of the adsorbent according
to claim 1, wherein the mixing pipeline is a continuously bent elbow.
3. The apparatus for testing the mercury removal efficiency of the adsorbent according
to claim 1 or 2, wherein the air preheater has a heating temperature range of 150-160°C.
4. The apparatus for testing the mercury removal efficiency of the adsorbent according to claim 3, wherein a flowmeter, a flow control valve and a temperature sensor are arranged on the exhaust pipeline.
5. The apparatus for testing the mercury removal efficiency of the adsorbent according
to claim 4, wherein the mercury analyzer is a VM3000 mercury analyzer.
6. A method for testing mercury removal efficiency of an adsorbent, comprising the
following steps:
step 1: turning on an air compressor and an air preheater, compressing outside air into a
high-speed airflow by using the air compressor, and dividing the high-speed airflow into two
parts; and heating one part of the high-speed airflow through the air preheater to form hot air
and supplying the hot air to a premixing chamber; and
meanwhile, releasing nitrogen through a nitrogen container to serve as mercury-carrying
gas to convey gaseous mercury in a mercury generator to the premixing chamber, and mixing
the nitrogen with the hot air to form simulated flue gas;
step 2: conveying the other part of the high-speed airflow to a micro-screw feeder, and
conveying a mercury removal adsorbent in a sealed feed bin to an injection port, the mercury
removal adsorbent being injected to a cavity of a mixing pipeline through the injection port,
and mixed with the simulated flue gas entering the mixing pipeline for a mercury removal
process;
step 3: supplying mixed gas containing solid particles after the mercury removal to a bag
dust collector for dust removal; and
step 4: supplying mixed gas subjected to the dust removal to an adsorption drum, and
removing unadsorbed gaseous mercury through an activated carbon column.
6. The method for testing the mercury removal efficiency of the adsorbent according to
claim 5, wherein in step 2, morphological and concentration data of the mercury in sampling
pipelines at different positions on the mixing pipeline are collected by a mercury analyzer in
real time, the data is sent to a computer, and the computer obtains a dynamic mercury
removal characteristic of the adsorbent through the received data.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110118447.9A CN113155695A (en) | 2021-01-28 | 2021-01-28 | Device and method for testing mercury removal efficiency of adsorbent |
| CN2021101184479 | 2021-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021101463A4 true AU2021101463A4 (en) | 2021-05-13 |
Family
ID=75829088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021101463A Ceased AU2021101463A4 (en) | 2021-01-28 | 2021-03-22 | Apparatus and method for testing mercury removal efficiency of adsorbent |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113155695A (en) |
| AU (1) | AU2021101463A4 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202497799U (en) * | 2011-12-16 | 2012-10-24 | 国电环境保护研究院 | Fire coal flue gas adsorption mercury removal device |
| CN103721525B (en) * | 2014-01-02 | 2015-09-09 | 东南大学 | A kind of sorbent injection flue gas mercury removal device and method |
| CN105115924B (en) * | 2015-07-07 | 2018-07-24 | 重庆大学 | A kind of method and device of test carbon-supported catalyst demercuration performance |
| CN109061033A (en) * | 2018-07-10 | 2018-12-21 | 华电电力科学研究院有限公司 | SCR denitration demercuration integration catalyst integrated experiment device and test method |
-
2021
- 2021-01-28 CN CN202110118447.9A patent/CN113155695A/en active Pending
- 2021-03-22 AU AU2021101463A patent/AU2021101463A4/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN113155695A (en) | 2021-07-23 |
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| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |