CN207730502U - The device of low volatility trace element sampling monitoring suitable for flue gas - Google Patents
The device of low volatility trace element sampling monitoring suitable for flue gas Download PDFInfo
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Abstract
The device for low volatility trace element sampling monitoring that the utility model discloses a kind of suitable for flue gas, in the front end of sampling gun according to the difference of flue gas condition, the applicable sampling head of installation pre-processes flue gas, make proper temperature and dustless flue gas is by activated carbon tube, adsorption sampling is carried out to the trace element in flue gas；Specifically, in positions such as SCR entrances, using the high grey sampling head of high temperature, which reduces smoke temperature by membrane filtration flying dust, air blanketing；In positions such as air preheater outlet, deduster entrances, using the high grey sampling head of low temperature, which divides double-filtration flying dust by inertial filter and membrane filtration；In positions such as house outlet, desulfurizing tower outlets, using the low grey sampling head of low temperature, which passes through membrane filtration flying dust, heating device adjusts smoke temperature；Using the device, may be implemented to use adsorbent charcoal tube method, the sampling monitoring of trace element (especially low volatility trace element) in different flue positions are to flue gas, and ensure the accurate and reliable of its concentration and morphometry result.
Description
Technical field
The utility model is related to coal-burning power plant's environmental protection and pollutant emission monitoring technical field, more particularly to one kind to be suitable for
The device of monitoring is sampled to low volatility trace element in flue gas.
Background technology
The element of coal constitute it is complicated, other than the elements such as carbon, hydrogen, the oxygen directly related with burning, also containing silicon,
All multielements such as aluminium, nitrogen, sulphur, heavy metal (such as mercury, chromium, lead, selenium, arsenic etc.).Chemistry occurs in combustion for these elements
Reaction, the element for being converted into the different mediums such as flue gas, flying dust, lime-ash are constituted, and the product of conversion is for health, environmental pollution
Effect be also not quite similar.Wherein, the pollutant in flue gas extensively, after discharge is difficult to handle due to endangering big, coverage,
It is the emphasis of coal-burning power plant's pollutant catabolic gene.
As coal-burning power plant's minimum discharge controls the propulsion of work, the Conventional pollutions such as dust, nitrogen oxides, sulfur dioxide
It has been obtained for effectively controlling.Therefore in recent years, the detrimental trace elements discharge of coal-burning power plant is more and more by the wide of society
General concern.Although it is generally very low that this is mainly due to the contents of detrimental trace elements, its bio-toxicity is very high, for human body
Health, the influence protrusion of environmental pollution.And the emission performance of coal-burning power plant's detrimental trace elements is grasped, illustrates in production process and has
Evil trace element Transport, be realize air detrimental trace elements emission control basis, and realize different flue positions,
Detrimental trace elements and the accurate measurements of form under different flue gas conditions, then be the premise of the above work.
The research of measurement for trace element in flue gas, mercury is more, and test method is also more mature.But in flue gas
The research and development of other trace element measurement methods then obviously lag, and current standard method both domestic and external only has liquid absorption method, typical
, as the principle of U.S. EPA Method 29, this method are：Coal-fired flue-gas is by the particulate matter in filter device removal flue gas
It enters later in using nitric acid/hydrogen peroxide, acid potassium permanganate as a series of absorption bottles of absorbing liquid, the trace member in flue gas
Plain absorbed liquid trapping, then analyzes the trace element concentration in solution by instrument, you can conversion obtains in flue gas
Trace element concentration.But that there are requirements complicated for operation, to tester and process control is high, easy tos produce for this method
The problems such as operating error.
In the measurement method of mercury in flue gas concentration, there is a kind of adsorbent charcoal tube method, is to use the activated carbon in pipe in flue gas
Mercury adsorbed, then carry out analysis measurement, and in order to ensure the reliable of measurement result, two activated carbon tubes need to be used simultaneously
It is sampled, in addition there are other quality control methods.Compared with liquid absorption method, the main advantage of adsorbent charcoal tube method exists
In easy to operate, the accuracy of measurement result is more secure.
But absorption carbon tube method is when surveying mercury, it is desirable that is tested under the conditions of micronic dust after deduster, core is to prevent
Influence of the mercury to measurement result in particulate matter, the mercury in particulate matter is few compared with total mercury at this time, it is ensured that measurement result
It is accurate.And when carrying out the measurement of other trace elements, since the volatility of other trace elements is often relatively low, even if in dedusting
Afterwards, also with the presence of a big chunk in particulate matter, measurement result can be influenced.And before dedusting height ash under the conditions of, even more
Absorption carbon tube method can not be used to be sampled monitoring to trace element.
Therefore, how to realize that adsorbent charcoal tube method accurately carries out low volatility trace element discharge under different flue gas conditions
Sampling monitoring, the emission performance and Transport of the trace element to grasping coal-burning power plant or other stationary sources, then carries out trace
The control of secondary element, has very important significance.The different flue gas conditions, are typically include：Flue before and after SCR denitration
The high grey flue gases of (300~400 DEG C) of high temperature, after air preheater, (100~150 DEG C) the high grey flue gases of the low temperature before deduster, deduster
The low grey flue gas of low temperature afterwards.
Invention content
The sampling prison of low volatility trace element can be accurately carried out in order to realize adsorbent charcoal tube method under different flue gas conditions
It surveys, the utility model devises front-end sampling device, and for the high ash of high temperature, low temperature on the basis of existing EPA 30B methods
The different characteristics of high ash, the low ash of low temperature, uses different schemes, to propose one kind low volatility suitable for flue gas
The device and method of trace element sampling monitoring.
In order to achieve the above object, the utility model adopts the following technical solution：
A kind of device of the low volatility trace element sampling monitoring suitable for flue gas, under the conditions of high temperature high ash,
The front end of sampling gun 1 is equipped with the high grey sampling head 10 of high temperature, under the conditions of low temperature high ash, is equipped in the front end of sampling gun 1 low
Warm high grey sampling head 18 is equipped with the low grey sampling head of low temperature 22 under the conditions of low temperature low ash in the front end of sampling gun 1；It is sampling
Activated carbon tube 2 is installed in the leading portion of rifle 1, is sampled using the high grey sampling head 10 of high temperature, the high grey sampling head 18 of low temperature, the low ash of low temperature
First 22 pairs of samplings flue gas is dusted, and adjusts flue-gas temperature so that temperature meets measuring condition and dustless flue gas passes through work
Property charcoal pipe 2, meets the sampling condition of trace element；
The entrance of the high temperature height ash sampling head 10 is equipped with filter mantle 7 and porous plate 9, between filter mantle 7 and porous plate 9
Equipped with high temperature filter membrane 8, for filtering flying dust；When sampling flue-gas temperature, which is down to, meets measuring condition, using activated carbon tube 2 to cigarette
Trace element absorption sampling in gas；
The front end side of the low temperature height ash sampling head 18 is equipped with the thief hatch 17 being sampled, low temperature height ash sampling head 18
Interior stage casing is equipped with multistage cinder baffle 19, is filtered to cinder using inertia；Back segment in the high grey sampling head 18 of low temperature, is equipped with
Porous plate 21, and low temperature filter membrane 20 is housed on porous plate 21, for filtering fine ash；Dustless flue gas is adopted by activated carbon tube 2
Sample.
Middle part is equipped with porous plate 21 in the low grey sampling head 22 of the low temperature, and low temperature filter membrane 20 is housed on porous plate 21,
Flying dust is filtered, while adjusting flue-gas temperature as needed, makes that temperature meets measuring condition and dustless flue gas passes through activated carbon tube 2
Sampling.
7 front end of the filter mantle is equipped with sampling mouth 15, realizes isokinetic sampling；It is equipped with storage ash-pit 16 in the filter mantle 7, uses
Flying dust under when flying dust is more, storing high temperature filter membrane 8 and filtering.
The periphery of the high temperature height ash sampling head 10 is equipped with air blanketing 11, is equipped in the end of high temperature height ash sampling head 10
Air inlet 12 and gas outlet 13, air inlet 13 are connected with cooling air pump 14, and the air generated using cooling air pump 14 is to high temperature height
Flue gas in grey sampling head 10 is quickly cooled down, and flue-gas temperature is made to meet measuring condition.
The control of flue-gas temperature at the activated carbon tube 2, the air capacity generated by the cooling air pump 14 of adjusting is realized, or is led to
Position of the sampling gun 1 in high temperature height ash sampling head 10 is overregulated to realize.
The multistage cinder baffle 19 is three-level, and the first order is trepanning among plectane, and flue gas passes through from centre, and first
Grade plectane is provided with an aperture close to 17 side of thief hatch, is taken out convenient for the cinder under filtering；The second level is that diameter is less than low temperature height
The plectane of 18 inner cylinder of grey sampling head, flue gas are flowed through from surrounding；The third level is trepanning among plectane, and flue gas passes through from centre, and sets
There is storage ash-pit.
The entrance of the low grey sampling head of the low temperature 22 is equipped with sampling mouth 15, realizes isokinetic sampling；In the low grey sampling head of low temperature
22 are surrounded by heating device 23, so that flue-gas temperature is met measuring condition and keep the low grey sampling head 22 of low temperature interior without water condensation.
The high grey sampling head 10 of the high temperature, the high ash sampling head 18 of low temperature grey sampling head 22 low with low temperature, inside sampling head,
It is all can with the component of smoke contacts, in order to avoid the possible absorption to trace element, using glass or polytetrafluoro material, or
Person seals tight in metal surface glass plating coating or polytetrafluoro coating, and between associated component.
Two activated carbon tubes 2 are installed in the leading portion of sampling gun 1, the inside of sampling gun 1 is also classified into two parts and walks two respectively
The end of road flue gas, sampling gun 1 is connected with two connecting tubes 3, and connecting tube 3 is connected with flue gas de-watering apparatus 4, flue gas de-watering apparatus
4 two sampling pumps 5 of connection, every sampling pump 5 is separately connected a set of flue gas flow measuring device 6, to realize that two-way flue gas is same
When sample and metering.
The method that the device of low volatility trace element sampling monitoring is sampled monitoring suitable for flue gas,
Under the conditions of high temperature high ash, first passes through high temperature filter membrane 8 and filter flying dust at high temperature, under then making the temperature of sampling flue gas quick
Drop, ensures that temperature meets measuring condition and dustless flue gas is by activated carbon tube 2, and flying dust, the flue gas under high temperature are quick
The influence to cool down to trace element is small, and it is accurate to ensure to measure；Under the conditions of low temperature high ash, multistage cinder baffle is first passed through
19 are filtered cinder using inertia, are then filtered to fine ash using low temperature filter membrane 20, same to ensure at activated carbon tube 2
Flue-gas temperature it is suitable and dustless, and prevent flying dust from forming a thick layer adsorption layer on low temperature filter membrane 20, to trace element
Second adsorption is generated, it is accurate to ensure to measure；Under the conditions of low temperature low ash, flying dust is filtered using low temperature filter membrane 20, and
Flue-gas temperature is set to meet measuring condition by heating device 23, and without water condensation in sampling head, it is accurate to ensure to measure.
Compared to the prior art compared with the outstanding advantages of the utility model are：
1. being pre-processed to flue gas by sampling head so that proper temperature and dustless flue gas is by activated carbon tube, it is right
Trace element in flue gas carries out adsorption sampling, and the pretreatment of sampling head is while realizing that flying dust and flue gas detach, right
The state of trace element does not impact, and ensures the accuracy of measurement result, to realize using adsorbent charcoal tube method, in different cigarettes
Road position is particularly suitable for low volatility trace element to the sampling monitoring of trace element in flue gas.
2. under the conditions of high temperature high ash, it is sampled, is dusted first, under filtering using the high grey sampling head of high temperature
It is weak to the adsorption capacity of trace element under the conditions of flying dust is due to being in high temperature (300~400 DEG C), therefore to the shadow of measurement result
Sound can be ignored, then fast cooling, and the position of sampling gun can be set in place according to smoke temperature situation of change, to real
Now to the accurate measurement of trace element concentration in flue gas and its form.
3. under the conditions of low temperature high ash, it is sampled, is first utilized a large amount of cinder used using the high grey sampling head of low temperature
Property filtering principle carry out by-pass filtration, then utilize filter membrane to carry out secondary filtration to remaining fine ash, due to winged before filter membrane
Ash quantity has been greatly decreased, and a thick layer flying dust layer will not be formed, therefore less to the absorption of trace element, to measurement result
Influence can be ignored, to realize the accurate measurement to trace element concentration in flue gas and its form.
4. under the conditions of low temperature low ash, it is sampled using the low grey sampling head of low temperature, flying dust is filtered using filter membrane,
And flue gas is heated when necessary using heating device, so that flue-gas temperature is met measuring condition, and in sampling head
Without water condensation, to realize the accurate measurement to trace element concentration in flue gas and its form.
5. the utility model is only by mercury emissions monitoring EPA30B method instruments under the conditions of for low temperature micronic dust
On the basis of device, in the front end of sampling gun according to the difference of flue gas condition, the sampling head of each self application is installed, you can realization pair
The sampling monitoring of each trace elements under different flue gas conditions, it is simple system, easy to operate, at low cost.
Description of the drawings
Fig. 1 is utility model device structural schematic diagram.
Fig. 2 is the schematic diagram of the embodiments of the present invention 1.
Fig. 3 is the schematic diagram of the embodiments of the present invention 2.
Fig. 4 is the schematic diagram of the embodiments of the present invention 3.
Specific implementation mode
The utility model is described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of device of the low volatility trace element sampling monitoring suitable for flue gas of the utility model,
Under the conditions of high temperature high ash, the high grey sampling head 10 of high temperature is installed in the front end of sampling gun 1, under the conditions of low temperature high ash, is being adopted
The front end of sample rifle 1 is equipped with the high grey sampling head 18 of low temperature, and under the conditions of low temperature low ash, low temperature is equipped in the front end of sampling gun 1
Low ash sampling head 22；Activated carbon tube 2 is installed in the leading portion of sampling gun 1, is adopted using the high grey sampling head 10 of high temperature, low temperature height ash
The low grey sampling head of sample head 18, low temperature 22 is dusted sampling flue gas, and adjusts flue-gas temperature so that temperature meets measuring condition
(100~150 DEG C) and dustless flue gas meet the sampling condition of trace element by activated carbon tube 2.The high ash sampling of the high temperature
First 10 entrance is equipped with filter mantle 7 and porous plate 9, and high temperature filter membrane 8 is housed between filter mantle 7 and porous plate 9, winged for filtering
Ash；When sampling flue-gas temperature, which is down to, meets measuring condition (100~150 DEG C), using activated carbon tube 2 to the trace member in flue gas
Element absorption sampling.The front end side of the low temperature height ash sampling head 18 is equipped with the thief hatch 17 being sampled, and the high ash of low temperature samples
Stage casing in first 18 is equipped with multistage cinder baffle 19, is filtered to cinder using inertia；Back segment in the high grey sampling head 18 of low temperature,
Equipped with porous plate 21, and low temperature filter membrane 20 is housed on porous plate 21, for filtering fine ash；Dustless flue gas passes through activated carbon tube
2 samplings.Middle part is equipped with porous plate 21 in the low grey sampling head 22 of the low temperature, and low temperature filter membrane 20, mistake are housed on porous plate 21
Flying dust is filtered, while adjusting flue-gas temperature as needed, makes that temperature meets measuring condition (100~150 DEG C) and dustless flue gas is logical
Cross the sampling of activated carbon tube 2.
As preferred embodiments of the present invention, 7 front end of the filter mantle is equipped with sampling mouth 15, realizes that constant speed takes
Sample；Storage ash-pit 16 is equipped in the filter mantle 7, for when flying dust is more, storing the flying dust under high temperature filter membrane 8 is filtered.
As preferred embodiments of the present invention, the periphery of the high temperature height ash sampling head 10 is equipped with air blanketing
11, it is equipped with air inlet 12 and gas outlet 13 in the end of high temperature height ash sampling head 10, air inlet 13 is connected with cooling air pump 14, profit
The air generated with cooling air pump 14 is quickly cooled down the flue gas in the high ash sampling head of high temperature 10, so that flue-gas temperature is met and surveys
Amount condition.
As preferred embodiments of the present invention, the control of flue-gas temperature at the activated carbon tube 2 is cold by adjusting
But the air capacity that air pump 14 generates is realized, or is realized by adjusting position of the sampling gun 1 in high temperature height ash sampling head 10.
As preferred embodiments of the present invention, the multistage cinder baffle 19 is three-level, and the first order is in plectane
Between trepanning, flue gas passes through from centre, and is provided with an aperture close to 17 side of thief hatch in first order plectane, convenient for thick under filtering
Ash takes out；The second level is the plectane that diameter is less than low temperature 18 inner cylinder of high grey sampling head, and flue gas is flowed through from surrounding；The third level is plectane
Intermediate trepanning, flue gas pass through from centre, and equipped with storage ash-pit.
As preferred embodiments of the present invention, the entrance of the low grey sampling head of the low temperature 22 is equipped with sampling mouth 15,
Realize isokinetic sampling；It is being surrounded by heating device 23, flue-gas temperature is made to meet measuring condition, and is making the low grey sampling head of low temperature
Without water condensation in 22.
As preferred embodiments of the present invention, the high grey sampling head 10 of the high temperature, 18 and of the high grey sampling head of low temperature
The low grey sampling head 22 of low temperature, inside sampling head, it is all can be with the component of smoke contacts, in order to avoid possible to trace element
Absorption, using glass or polytetrafluoro material, or in metal surface glass plating coating or polytetrafluoro coating, and related
It is sealed between component tight.
As preferred embodiments of the present invention, two activated carbon tubes 2 are installed in the leading portion of sampling gun 1, are sampled
The inside of rifle 1 is also classified into two parts and walks two-way flue gas respectively, and the end of sampling gun 1 is connected with two connecting tubes 3, connecting tube 3 with
Flue gas de-watering apparatus 4 is connected, and flue gas de-watering apparatus 4 connects two sampling pumps 5, and every sampling pump 5 is separately connected a set of flue gas stream
Measuring device 6, to realize two-way flue gas while sample and measuring.
The utility model method that low volatility trace element is sampled monitoring suitable for flue gas, in the high ash of high temperature
Under the conditions of, it first passes through high temperature filter membrane 8 and filters flying dust at high temperature, then make the temperature rapid decrease of sampling flue gas, ensure temperature
Meet measuring condition (100~150 DEG C) and dustless flue gas is by activated carbon tube 2, and flying dust, the flue gas under high temperature are quick
The influence to cool down to trace element is small, and it is accurate to ensure to measure；Under the conditions of low temperature high ash, multistage cinder baffle is first passed through
19 are filtered cinder using inertia, are then filtered to fine ash using low temperature filter membrane 20, same to ensure at activated carbon tube 2
Flue-gas temperature it is suitable and dustless, and prevent flying dust from forming a thick layer adsorption layer on low temperature filter membrane 20, to trace element
Second adsorption is generated, it is accurate to ensure to measure；Under the conditions of low temperature low ash, flying dust is filtered using low temperature filter membrane 20, and
Flue-gas temperature is set to meet measuring condition by heating device 23, and without water condensation in sampling head, it is accurate to ensure to measure.
Embodiment one：
As shown in Figure 1, the present embodiment " a kind of device of the low volatility trace element sampling monitoring suitable for flue gas and
The trace element of method ", grey flue gas high to the high temperature of SCR entrances is sampled monitoring.At this point, first, in accordance with ideal cigarette
Sampling gun 1 is connected with connecting tube 3, flue gas de-watering apparatus 4, sampling pump 5, flow measurement device 6 by the sampling flow of gas successively,
There are two-way, connecting tube 3, sampling pump 5, flow measurement device 6 there are two sets in sampling gun 1, flue gas de-watering apparatus 4, to meet
The requirement that two-way flue gas samples simultaneously.Two activated carbon tubes 2 are installed in the leading portion of sampling gun 1, for trace element in flue gas
Absorption sampling.In the front end of sampling gun 1, installation high temperature height ash sampling head 10.
In order to by flue gas flying dust and gas detach, in the entrance of the high grey sampling head of high temperature 10, be equipped with filter mantle 7 and more
Orifice plate 9 is equipped with high temperature filter membrane 8, for filtering flying dust between filter mantle 7 and porous plate 9.Filter mantle 7 is equipped with sampling mouth 15,
Isokinetic sampling is realized, and equipped with storage ash-pit 16, for when flying dust is more, storing the flying dust under high temperature filter membrane 8 is filtered.
In order to make flue-gas temperature meet measuring condition, it is equipped with air blanketing 11 in the periphery of high temperature height ash sampling head 10,
The end of high temperature height ash sampling head 10 is equipped with air inlet 12 and gas outlet 13, and air inlet 13 is connected with cooling air pump 14, and utilization is cold
But the air that air pump 14 generates is quickly cooled down the flue gas in the high grey sampling head of high temperature 10, make flue-gas temperature be down to 130~
150 DEG C of levels.The control of flue-gas temperature at activated carbon tube 2, the air capacity realization that can have both been generated by the cooling air pump 14 of adjusting,
It can also be realized by adjusting position of the sampling gun 1 in high temperature height ash sampling head 10.
Inside the high grey sampling head of high temperature 10, it is all can be with the component of smoke contacts, in order to avoid possible to trace member
The absorption of element need to use glass or polytetrafluoro material, or in metal surface glass plating coating or polytetrafluoro coating, and
Need sealing tight between associated component.
The characteristics of embodiment is：Smoke temperature is reduced by membrane filtration flying dust, air blanketing, can be realized using adsorbent charcoal
Trace element in tube method grey flue gas high to high temperature is sampled monitoring, and ensures that its concentration and the accurate of morphometry result can
It leans on.
Embodiment two：
As shown in Fig. 2, the present embodiment " a kind of device of the low volatility trace element sampling monitoring suitable for flue gas and
The trace element of method ", grey flue gas high to the low temperature of air preheater outlet, deduster entry position is sampled monitoring.At this point, first
First according to the sampling flow of ideal flue gas, sampling gun 1 is surveyed with connecting tube 3, flue gas de-watering apparatus 4, sampling pump 5, flow successively
It measures device 6 to be connected, there is two-way, connecting tube 3, sampling pump 5, flow measurement device 6 to have in sampling gun 1, flue gas de-watering apparatus 4
Two sets, to meet the requirement of two-way flue gas while sampling.Two activated carbon tubes 2 are installed in the leading portion of sampling gun 1, in flue gas
The absorption of trace element samples.In the front end of sampling gun 1, installation low temperature height ash sampling head 18.
In order to by flue gas flying dust and gas detach, in the front end side of the high grey sampling head of low temperature 18, be equipped with thief hatch
17, realize isokinetic sampling；The stage casing in the high grey sampling head 18 of low temperature is equipped with multistage cinder baffle 19, using inertia to cinder into
Row filtering；The back segment in the high grey sampling head 18 of low temperature, is equipped with porous plate 21, and low temperature filter membrane 20 is housed on porous plate 21, uses
In filtering fine ash.
Multistage cinder baffle 19 is designed as, and the first order is trepanning among plectane, and flue gas passes through from centre, and is justified in the first order
Plate is provided with an aperture close to 17 side of thief hatch, is taken out convenient for the cinder under filtering；The second level is that diameter is slightly less than the high ash of low temperature
The plectane of 18 inner cylinder of sampling head, flue gas are flowed through from surrounding；The third level is trepanning among plectane, and flue gas passes through from centre, and is equipped with
Store up ash-pit.
Inside the high grey sampling head of low temperature 18, it is all can be with the component of smoke contacts, in order to avoid possible to trace member
The absorption of element need to use glass or polytetrafluoro material, or in metal surface glass plating coating or polytetrafluoro coating, and
Need sealing tight between associated component.
The characteristics of embodiment is：By inertial filter and membrane filtration, divide double-filtration flying dust, to reduce as far as possible
Absorption of the flying dust to trace element on filter membrane.It, can isokinetic sampling's guarantee solid-state and gaseous state trace element total amount when necessary
What is measured is accurate；Primary non-isokinetic sampling, and reduce flying dust as far as possible and enter sampling head, ensure the standard that gaseous state trace element measures
Really.Monitoring is sampled using the trace element in adsorbent charcoal tube method grey flue gas high to low temperature to realize, and ensures its concentration
And morphometry result is accurate and reliable.
Embodiment three：
As shown in figure 3, " a kind of low volatility trace element suitable for flue gas is sampled the dress of monitoring to the present embodiment
Set and method ", it is low to the low temperature of house outlet, desulfurizing tower outlet port ash flue gas trace element be sampled monitoring.This
When, first, in accordance with the sampling flow of ideal flue gas, by sampling gun 1 successively with connecting tube 3, flue gas de-watering apparatus 4, sampling pump 5, stream
Measuring device 6 is connected, and has two-way, connecting tube 3, sampling pump 5, flow measurement device 6 in sampling gun 1, flue gas de-watering apparatus 4
There are two sets, to meet the requirement of two-way flue gas while sampling.Two activated carbon tubes 2 are installed in the leading portion of sampling gun 1, are used for cigarette
The absorption sampling of trace element in gas.In the front end of sampling gun 1, the low grey sampling head of installation low temperature 22.
In order to by flue gas flying dust and gas detach, be equipped with sampling mouth 15 in the entrance of the low grey sampling head of low temperature 22, it is real
Existing isokinetic sampling；It is equipped with porous plate 21 at the middle part of the low grey sampling head of low temperature 22, and low temperature filter membrane 20 is housed on porous plate 21,
Filter flying dust.
In order to make flue-gas temperature meet measuring condition, and prevent having water condensation in the low grey sampling head of low temperature 22, it is low in low temperature
Grey sampling head 22 is surrounded by heating device 23, is heated when necessary to flue gas.Especially when the temperature exported to desulfurizing tower
50 DEG C or so, humidity high flue gas is when being sampled, it is necessary to open heating device 23, make the cigarette in the low grey sampling head of low temperature 22
Temperature degree reaches 130~150 DEG C of levels.
Inside the low grey sampling head of low temperature 22, it is all can be with the component of smoke contacts, in order to avoid possible to trace member
The absorption of element need to use glass or polytetrafluoro material, or in metal surface glass plating coating or polytetrafluoro coating, and
Need sealing tight between associated component.
The characteristics of embodiment is：By membrane filtration flying dust, ensure that smoke temperature in reasonable level and is prevented by heating device
Only there is water condensation, can realize and monitoring is sampled using the trace element in adsorbent charcoal tube method grey flue gas low to low temperature, and protect
Demonstrate,prove the accurate and reliable of its concentration and morphometry result.
Claims (8)
1. a kind of device of the low volatility trace element sampling monitoring suitable for flue gas, it is characterised in that：Including sampling gun
(1), under the conditions of high temperature high ash, the front end of the sampling gun (1) is equipped with the high grey sampling head (10) of high temperature, in the high lath of low temperature
Under part, the front end of the sampling gun (1) is equipped with the high grey sampling head (18) of low temperature, under the conditions of low temperature low ash, the sampling gun
(1) front end is equipped with the low grey sampling head (22) of low temperature；Activated carbon tube (2) is installed in the leading portion of sampling gun (1)；
The entrance of the high grey sampling head (10) of the high temperature is equipped with filter mantle (7) and porous plate (9), in filter mantle (7) and porous plate
(9) between, high temperature filter membrane (8) is housed, for filtering flying dust；When sampling flue-gas temperature, which is down to, meets measuring condition, work is utilized
Property charcoal pipe (2) in flue gas trace element adsorb sampling；
The front end side of the high grey sampling head (18) of the low temperature is equipped with the thief hatch (17) being sampled, the high grey sampling head of low temperature
(18) interior stage casing is equipped with multistage cinder baffle (19), is filtered to cinder using inertia；After in the high grey sampling head (18) of low temperature
Section is equipped with porous plate (21), and low temperature filter membrane (20) is housed on porous plate (21), for filtering fine ash；Dustless flue gas is logical
Cross activated carbon tube (2) sampling；
Middle part is equipped with porous plate (21) in the low grey sampling head (22) of the low temperature, and low temperature filter membrane is housed on porous plate (21)
(20), flying dust is filtered, while adjusting flue-gas temperature as needed, makes that temperature meets measuring condition and dustless flue gas passes through activity
Charcoal pipe (2) samples.
2. the device of the low volatility trace element sampling monitoring according to claim 1 suitable for flue gas, feature
It is：Filter mantle (7) front end is equipped with sampling mouth (15), realizes isokinetic sampling；Storage ash-pit is equipped in the filter mantle (7)
(16), it is used for when flying dust is more, the flying dust under storage high temperature filter membrane (8) filter.
3. the device of the low volatility trace element sampling monitoring according to claim 1 suitable for flue gas, feature
It is：The periphery of the high grey sampling head (10) of the high temperature is equipped with air blanketing (11), in the end of the high grey sampling head (10) of high temperature
Equipped with air inlet (12) and gas outlet (13), air inlet (13) is connected with cooling air pump (14), is generated using cooling air pump (14)
Air the flue gas in the high grey sampling head of high temperature (10) is quickly cooled down, so that flue-gas temperature is met measuring condition.
4. the device of the low volatility trace element sampling monitoring according to claim 3 suitable for flue gas, feature
It is：The control of flue-gas temperature at the activated carbon tube (2), the air capacity realization generated by the cooling air pump (14) of adjusting, or
It is realized by adjusting position of the sampling gun (1) in the high grey sampling head (10) of high temperature.
5. the device of the low volatility trace element sampling monitoring according to claim 1 suitable for flue gas, feature
It is：The multistage cinder baffle (19) is three-level, and the first order is trepanning among plectane, and flue gas passes through from centre, and first
Grade plectane is provided with an aperture close to thief hatch (17) side, is taken out convenient for the cinder under filtering；The second level is that diameter is less than low temperature
The plectane of high ash sampling head (18) inner cylinder, flue gas are flowed through from surrounding；The third level is trepanning among plectane, and flue gas passes through from centre,
And equipped with storage ash-pit.
6. the device of the low volatility trace element sampling monitoring according to claim 1 suitable for flue gas, feature
It is：The entrance of the low grey sampling head (22) of the low temperature is equipped with sampling mouth (15), realizes isokinetic sampling；In the low grey sampling head of low temperature
(22) it is surrounded by heating device (23), flue-gas temperature is made to meet measuring condition and is made is anhydrous in the low grey sampling head (22) of low temperature
Condensation.
7. the device of the low volatility trace element sampling monitoring according to claim 1 suitable for flue gas, feature
It is：The high grey sampling head (10) of the high temperature, the high grey sampling head (18) of low temperature and the low grey sampling head (22) of low temperature, in sampling head
Portion, it is all can be with the component of smoke contacts, in order to avoid the possible absorption to trace element, using glass or polytetrafluoro material
Matter, or in metal surface glass plating coating or polytetrafluoro coating, and sealed tightly between associated component.
8. the device of the low volatility trace element sampling monitoring according to claim 1 suitable for flue gas, feature
It is：Two activated carbon tubes (2) are installed in the leading portion of sampling gun (1), the inside of sampling gun (1) is also classified into two parts and walks respectively
The end of two-way flue gas, sampling gun (1) is connected with two connecting tubes (3), and connecting tube (3) is connected with flue gas de-watering apparatus (4), cigarette
Gas de-watering apparatus (4) connects two sampling pumps (5), and every sampling pump (5) is separately connected a set of flue gas flow measuring device (6),
To realize two-way flue gas while sample and measuring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721485815.9U CN207730502U (en) | 2017-11-09 | 2017-11-09 | The device of low volatility trace element sampling monitoring suitable for flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655728A (en) * | 2017-11-09 | 2018-02-02 | 中国华能集团清洁能源技术研究院有限公司 | The device and method of low volatility trace element sampling monitoring suitable for flue gas |
| WO2023193354A1 (en) * | 2022-04-06 | 2023-10-12 | 苏州西热节能环保技术有限公司 | Mercury sampling apparatus based on active carbon adsorption under high temperature, and control method |
-
2017
- 2017-11-09 CN CN201721485815.9U patent/CN207730502U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655728A (en) * | 2017-11-09 | 2018-02-02 | 中国华能集团清洁能源技术研究院有限公司 | The device and method of low volatility trace element sampling monitoring suitable for flue gas |
| CN107655728B (en) * | 2017-11-09 | 2024-05-07 | 中国华能集团清洁能源技术研究院有限公司 | Device and method suitable for sampling and monitoring low-volatility trace elements in flue gas |
| WO2023193354A1 (en) * | 2022-04-06 | 2023-10-12 | 苏州西热节能环保技术有限公司 | Mercury sampling apparatus based on active carbon adsorption under high temperature, and control method |
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