CN211477766U - Coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device - Google Patents
Coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device Download PDFInfo
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- CN211477766U CN211477766U CN201921744234.1U CN201921744234U CN211477766U CN 211477766 U CN211477766 U CN 211477766U CN 201921744234 U CN201921744234 U CN 201921744234U CN 211477766 U CN211477766 U CN 211477766U
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Abstract
The utility model discloses a coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device, which comprises an inner pipe (2), wherein a first-level step baffle (7) is arranged in the inner pipe (2) to divide the inner pipe into a sampling section and a flue gas channel section; a particle collecting chamber is arranged between the first high-temperature filter element (4) and the first inner core short pipe (3); a gas-phase heavy metal adsorption chamber is arranged between the second high-temperature filter element (6) and the second inner core short pipe (5), and adsorbent particles are filled in the gas-phase heavy metal adsorption chamber; flue gas passageway section tail end and gas-supply pipe (13) fixed connection, be equipped with aspiration pump (15) on gas-supply pipe (13), and its end of giving vent to anger is connected with the equipment of on-line measuring smoke composition, realizes smoke composition integration analysis when coal-fired gas heavy metal adsorption, the utility model provides a heavy metal sampling process reacts a difficult problem easily, has higher repeatability.
Description
Technical Field
The utility model belongs to the technical field of coal-fired device, more specifically relates to a coal-fired flue gas heavy metal adsorption and integrative sampling device of flue gas component analysis.
Background
Coal occupies the leading position in primary energy consumption of China, coal consumption in 2017 accounts for about 69% of the total primary energy consumption of China, and coal-fired power generation accounts for 90% particularly in the field of thermal power generation. The elements in the coal can be divided into a large amount of elements C, H, O, N, S and the like according to the concentration, and the concentration is more than 1000 ppm; the trace elements of Si, Al, Ca, Mg, K, Na, Fe, Mn, Ti, F, Cl, Br, I and the like with the concentration of 100-1000 ppm; trace elements As, Se, Pb, etc., in concentrations below 100 ppm. Heavy metals in coal include arsenic (As), cadmium (Cd), manganese (Mn), cobalt (Co), lead (Pb), mercury (Hg), selenium (Se), chromium (Cr), copper (Cu), zinc (Zn), nickel (Ni), iron (Fe), antimony (Sb), and the like, and the content of these elements is low, but the emission is also very large due to the huge coal consumption of coal-fired power plants. With the improvement of environmental protection requirements, the domestic and social life also puts forward the restriction on the emission of pollutants such as heavy metals. However, the current standard for the emission of atmospheric pollutants of thermal power plants in China only clearly limits the emission of Hg, and the emission limit of other trace elements is still in a blank stage. Compared with the advanced standards implemented abroad and the severe environmental protection pressure in China, the establishment of the relevant standards needs to be completed urgently.
At present, the research on migration, conversion, release and adsorption of heavy metals in a thermal power plant comprises laboratory device research and power plant sampling research, and most of power plant sampling devices are sampling pipes and indirect sampling.
The sampling of the sampling tube is to put the stainless steel tube with the air holes into the flue gas channel of the boiler, pump out the flue gas through the air pump at the tail end of the sampling tube, and the flue gas is soaked and washed by the solution, and the heavy metal is dissolved in the solution. The novel sampling tube is additionally provided with a heat preservation device and a flue gas cooling system, the cost is high, only one sampling tube has a ten thousand yuan value, the applicable test conditions are harsh, and the requirements of the boiler field test are difficult to meet. The traditional sampling tube device is simple and crude, chemical solution is adopted for complete absorption, the absorption solution is mostly strong acid, a large amount of chemical reagent is consumed, the solution replacement operation is complex, secondary pollution is easily caused, and the health of operating personnel is easily damaged, the novel sampling device is provided with a heat preservation and cooling system, the cost is high, the higher requirement is required for the experimental operation, the device is difficult to apply to a high-temperature environment, in addition, the novel sampling device is complex, and once the device is blocked by particulate matters, the repair of the device seriously delays the test process;
the indirect sampling includes taking a sample respectively to areas such as end ash, desulfurized gypsum, electrostatic precipitator, and the work load is big, implements more difficultly, no matter be the novel sampling tube after traditional sampling tube and the improvement or indirect sampling in addition, its target all takes out heavy metal in the flue gas as far as possible, and can not separate the heavy metal that has the form to the difference. In fact, the heavy metals in the coal-fired flue gas partially exist in the flue gas in a gas phase, and partially exist in the particles, so that the gas phase and the heavy metals enriched in the fine particles are difficult to capture by dust removal equipment, and the environment is greatly damaged, therefore, the research on the existence forms of the heavy metals at different temperatures is very important for understanding the true migration and transformation rules of the heavy metals in the coal-fired boiler, and a more reliable guide is provided for the heavy metal treatment scheme and the standard.
The existing test sampling device is adopted to research Pb, As, Se and other heavy metals, the stable reaction of the power plant under the actual high-temperature condition, the reaction of the heavy metals and the sampler in the sampling process and the heavy metals condensed on the sampler influence the test result and the separation of gas-phase and solid-phase heavy metals under the high-temperature condition are difficult problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects or improvement requirements of the prior art, the utility model provides a coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device, which divides an inner pipe into a sampling section and a flue gas channel section through a one-level step baffle, wherein the flue gas channel section adopts high-temperature filter elements and inner core short pipes which are arranged in a staggered way to realize the separation of particles and gas phase heavy metal in flue gas, and meanwhile, an adsorbent in the sampling section directly realizes the adsorption sampling of the flue gas heavy metal; the flue gas channel section is sequentially connected with the air suction pump and the flue gas online analysis equipment through the gas conveying pipe, so that the component analysis of the flue gas is completed while the heavy metal is sampled.
In order to realize the aim, the coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device comprises an inner pipe, wherein a first-stage step baffle is arranged in the inner pipe and divides the inner pipe into a sampling section and a flue gas channel section; wherein the content of the first and second substances,
a second high-temperature filter element, a second inner core short pipe, a first high-temperature filter element and a first inner core short pipe are sequentially arranged from the first-stage step baffle to the top of the sampling section in a staggered mode, and a particulate matter collecting chamber is arranged between the first high-temperature filter element and the first inner core short pipe and used for adsorbing coal-fired flue gas particulate matters; a gas-phase heavy metal adsorption chamber is arranged between the second high-temperature filter element and the second inner core short pipe, and adsorbent particles are filled in the gas-phase heavy metal adsorption chamber and are used for adsorbing gas-phase heavy metal in the flue gas;
the flue gas passageway section is located sample section afterbody, just flue gas passageway section tail end and gas-supply pipe fixed connection, be equipped with the aspiration pump on the gas-supply pipe, just the aspiration pump is given vent to anger the end and is connected with the equipment of on-line measuring gas composition, realizes gas composition integration analysis when coal-fired gas heavy metal adsorption.
Further, the outer wall of the flue gas channel section is provided with an outer pipe, the tail part of the outer pipe is provided with a cooling water inlet and a cooling water outlet respectively, and the cooling water inlet is connected with a circulating water pump.
Furthermore, a separation pipe which is parallel to the outer pipe and is provided with an opening at the top is arranged between the outer pipe and the inner pipe, a first heat exchange cooling water channel is formed between the inner pipe and the separation pipe, and a second cold heat exchange cooling water channel is formed between the separation pipe and the outer pipe.
Further, a plurality of heat exchanger fins are arranged between the inner tube and the separating tube and between the separating tube and the outer tube.
Furthermore, the cooling water inlet is formed in the bottom of the first heat exchange cooling water channel, and the cooling water inlet is formed in the bottom of the second heat exchange cooling water channel.
Furthermore, a protective cover is arranged at the top end of the inner pipe, a plurality of smoke gas circulation holes are formed in the protective cover, and threads are arranged on the outer wall of the other end of the protective cover and matched with the inner threads of the inner pipe.
Further, the distance from the first-stage step baffle to the bottom end of the sealing position of the protective cover cap is greater than the sum of the thicknesses of the two high-temperature filter elements and the height of the two inner core short pipes.
Further, a gas flowmeter is also arranged on the gas conveying pipe.
Further, the first high-temperature filter element and the second high-temperature filter element are respectively prepared from one or more of alumina, silicon oxide, high-temperature ceramic, alloy and glass fiber materials.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
(1) the utility model discloses a coal-fired flue gas heavy metal adsorption and flue gas component analysis integrative sampling device divides the inner tube into sampling section and flue gas channel section through one-level step baffle, wherein, adopt crisscross high temperature filter core and inner core nozzle stub that set up to realize the separation of particulate matter and gaseous phase heavy metal in the flue gas channel section, the absorbent in the sampling section realizes the absorption sample to the flue gas heavy metal directly simultaneously; the flue gas channel section is sequentially connected with the air suction pump and the flue gas online analysis equipment through the gas conveying pipe, so that the component analysis of the flue gas is completed while the heavy metal is sampled.
(2) The utility model discloses a coal-fired flue gas heavy metal adsorption and integrative sampling device of flue gas component analysis exists convection heat cooling water passageway between outer tube and the inner tube, and the flue gas after cooling water adsorbs in the flue gas passageway section outer cooling has guaranteed the safety of flowmeter and aspiration pump, and does not influence the adsorption reaction temperature. Under the action of the heat exchanger fins, the cooling water can be buffered in the process of circulating in the channel, so that the cooling water is fully contacted with the gas in the inner tube to achieve a more ideal convection heat exchange effect.
(3) The utility model discloses a coal-fired flue gas heavy metal adsorption and integrative sampling device of flue gas component analysis adopts gas flowmeter to do the quantitative basis of adsorbed gas volume, can realize the quantification of test result.
(4) The utility model discloses a coal-fired flue gas heavy metal adsorption and integrative sampling device of flue gas component analysis, the distance of one-level step baffle to visor cap driving fit department bottom should slightly be greater than two high temperature filter core thickness and two inner core nozzle stub height sums, can guarantee the back that high temperature filter core and inner core nozzle stub installation finish, screw up the inside complete laminating of cap inner tube, neither appear the unable tightening of block screw thread, also can not appear rocking the inner tube, there is not hard up condition in inner core nozzle stub and high temperature filter core, guarantee that the flue gas all passes through the inner core nozzle stub, and filter totally through the high temperature filter core.
Drawings
FIG. 1 is a schematic view of the overall structure of a sampling device integrating heavy metal adsorption and flue gas component analysis of coal-fired flue gas according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the arrangement among the inner core short tube, the high temperature filter element and the inner tube of the sampling device for the heavy metal adsorption and the flue gas component analysis of the coal-fired flue gas of the embodiment of the present invention;
FIG. 3 is a schematic diagram of a cooling water heat exchanger arrangement path related to the sampling device integrating heavy metal adsorption and flue gas component analysis of the coal-fired flue gas of the embodiment of the present invention;
fig. 4 is a schematic view of a protective cover according to an embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-protective cover, 2-inner tube, 3-first inner core short tube, 4-first high temperature filter element, 5-second inner core short tube, 6-second high temperature filter element, 7-first step baffle, 8-outer tube, 9-heat exchanger fin, 10-cooling water outlet, 11-cooling water inlet, 12-circulating water pump, 13-gas pipe, 14-gas flowmeter, 15-air pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
FIG. 1 is the embodiment of the utility model provides a coal-fired flue gas heavy metal adsorption and integrative sampling device overall structure schematic diagram of flue gas composition analysis. As shown in fig. 1, the utility model discloses a visor 1, inner tube 2, first inner core nozzle stub 3, first high temperature filter core 4, second inner core nozzle stub 5, second high temperature filter core 6, one-level step baffle 7, outer tube 8, heat exchanger fin 9, cooling water outlet 10, cooling water inlet 11, circulating water pump 12, gas-supply pipe 13, gas flowmeter 14, aspiration pump 15.
Specifically, the top end of the inner tube 2 is provided with a protective cover 1, the protective cover 1 is provided with a plurality of smoke gas through holes, and the outer wall of the other end of the protective cover is provided with threads which are matched with the internal threads of the inner tube 2.
The middle part of the inner pipe 2 is provided with a one-level step baffle 7, and the one-level step baffle 7 divides the inner pipe 2 into a sampling section and a flue gas channel section. The first-stage step baffle 7 is used for supporting the inner core short pipe and the high-temperature filter element and fixedly installing the inner core short pipe and the high-temperature filter element in the inner pipe 2. Specifically, one-level step baffle 7 is equipped with second high temperature filter core 6, second inner core nozzle stub 5, first high temperature filter core 4 and first inner core nozzle stub 3 to sample section top (visor department) in proper order, and inner core nozzle stub and high temperature filter core are installed in turn, form particulate matter collection chamber and gaseous phase heavy metal adsorption chamber. Wherein, a particle collection chamber is arranged between the first high-temperature filter element 4 and the first inner core short pipe 3, and a gas phase heavy metal adsorption chamber is arranged between the second high-temperature filter element 6 and the second inner core short pipe 5. Adsorbent particles are filled in the gas phase heavy metal adsorption chamber. The first high-temperature filter element 4 is used for blocking particles in the flue gas, so that the particles are collected in the particle collecting chamber between the first high-temperature filter element 4 and the first inner core short pipe 3; the second high-temperature filter element 6 is used for separating and containing adsorbent particles filled between the second high-temperature filter element 6 and the second inner core short pipe 5. The inner core nozzle stub can be covered by the high temperature filter core completely, and first high temperature filter core and second high temperature filter core are inseparable with the inner tube laminating, filter the solid particle in the flue gas when guaranteeing the sample, pass through gas. The utility model discloses a high temperature filter core and inner core nozzle stub are cut apart the inner tube and are two rooms, under the high temperature filter core separation effect, can realize particulate matter and gaseous phase heavy metal separation in the high temperature flue gas, are convenient for sample analysis respectively, just the utility model discloses a convenient dismantlement of high temperature filter core and inner core nozzle stub is convenient for wash, influences follow-up experiment when preventing that the sampling tube from being blockked up by flue gas particulate matter.
An outer pipe 8 is arranged on the outer wall of the tail end of the inner pipe 2 (on the outer wall of the flue gas channel section) and is concentrically arranged with the inner pipe 2. The outer tube 8 is arranged on one side of the first-stage step baffle 7 far away from the protective cover 2. The tail part of the outer pipe 8 is respectively provided with a cooling water inlet 11 and a cooling water outlet 10, and the cooling water inlet 11 is connected with a circulating water pump 12. The interior of the outer tube 8 is provided with a number of heat exchanger fins 9.
The inner pipe is divided into two sections by the first-stage step baffle 7, wherein the sampling section enters the flue gas channel; the outer pipe 8 is arranged outside the other section of the flue gas channel section, and cooling water cools the flue gas after adsorption outside the flue gas channel section, so that the safety of a flowmeter and an air pump is ensured, and the adsorption reaction temperature is not influenced.
The middle of the tail end of the inner pipe 2 is provided with a flue gas transmission hole which is fixedly connected with a gas transmission pipe 13, and the gas transmission pipe 13 is provided with a gas flowmeter 14 and an air pump 15. The air outlet end of the air pump 15 is connected with a flue gas analyzer or other equipment for on-line detection of flue gas components, and is used for further conveying the flue gas entering the gas conveying pipe 13 to the flue gas on-line analysis equipment for analysis of flue gas oxygen content, NOx and the like. The utility model discloses a gas flowmeter is the quantitative foundation of adsorbed gas volume, can realize the quantification of test result, and the end of giving vent to anger of aspiration pump links to each other with the equipment of on-line measuring flue gas composition such as flue gas analyzer, can accomplish flue gas component analysis when the heavy metal sample.
Further, fig. 2 is a schematic diagram of the arrangement among the inner core short tube, the high temperature filter element and the inner tube related to the coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device in the embodiment of the present invention; as shown in fig. 2, one-level step baffle 7 is divided into two sections of sampling section and flue gas passageway section with the inner tube, the distance of one-level step baffle 7 to 1 visor closing department bottom of visor should slightly be greater than two high temperature filter core thickness and two inner core nozzle stub height sums, guarantee that high temperature filter core and inner core nozzle stub are installed the back of finishing, screw up the inside complete laminating of cap inner tube, neither appear the unable tightening of block screw thread, also can not appear rocking the inner tube, there is not hard up condition in inner core nozzle stub and high temperature filter core, guarantee that the flue gas all passes through the inner core nozzle stub, and filter through the high temperature filter core totally.
FIG. 3 is a schematic diagram of a cooling water heat exchanger arrangement path related to the sampling device integrating heavy metal adsorption and flue gas component analysis of the coal-fired flue gas of the embodiment of the present invention; a convective heat exchange cooling water channel is arranged between the outer pipe 8 and the inner pipe 2, a separation pipe parallel to the inner pipe 2 and the outer pipe 8 is arranged in the middle of the channel, an opening is formed at the top end of the separation pipe, a first heat exchange cooling water channel is formed between the inner pipe 2 and the separation pipe, and a second cold heat exchange cooling water channel is formed between the separation pipe and the outer pipe 8. A plurality of heat exchanger fins 9 are arranged between the inner pipe 2 and the separating pipe and between the separating pipe and the outer pipe 8, so that the turbulent flow effect is achieved; the bottom of the first heat exchange cooling water channel is provided with a cooling water inlet 11, the bottom of the second heat exchange cooling water channel is provided with a cooling water outlet 10, the flowing direction of cooling water input close to the inner pipe is opposite to the flowing direction of flue gas collected in the inner pipe, and the flowing direction of cooling water output close to the outer pipe is consistent with the flowing direction of flue gas collected in the inner pipe. The cooling water enters from the cooling water inlet 11, flows through the first heat exchange cooling water channel and the second heat exchange cooling water channel in sequence, flows out from the cooling water outlet 10, returns to the water storage container, and can be buffered in the circulating process in the channels under the action of the heat exchanger fins 9, so that the cooling water is fully contacted with the gas in the inner pipe 2 to achieve a more ideal convection heat exchange effect.
Fig. 4 is a schematic view of a protective cover according to an embodiment of the present invention. A plurality of flue gas flowing holes are arranged on the cap of the protective cover 1 and are used for absorbing flue gas and particle substances of fire coal; the outer wall of the other end is provided with threads which are matched with the internal threads of the inner pipe 2, so that the assembly and disassembly are convenient.
Preferably, the length of the protective cover 1 can be selected according to test requirements, and the length of the part extending into the boiler flue from the top end of the protective cover to the inner pipe or the position where the adsorbent is completely put into the boiler flue gas channel can meet the sampling depth requirements of different positions of the boiler channel.
Preferably, the inner tube 2 is made of stainless steel, and can withstand high temperature and corrosion.
Preferably, the outer tube 8 is made of stainless steel, aluminum alloy, or the like, and is capable of dissipating heat well and resisting high temperature and corrosion.
Preferably, the adsorbent particles are oxides such as silica, alumina, etc., and the adsorption includes physical and chemical adsorption.
Preferably, the high-temperature filter element is prepared by sintering one or more of alumina, silica, high-temperature ceramic, alloy or glass fiber materials at high temperature, can allow smoke to pass through and prevent smoke particles and adsorbent particles from passing through, and simultaneously meets the high-temperature condition. The high-temperature filter element material can be selected according to the principle of not influencing the adsorption of the target heavy metal.
Preferably, the inner core short pipe is made of quartz, corundum, stainless steel, alloy and other materials, the high-temperature and corrosion-resistant requirements are met, and the material of the inner core short pipe is selected according to the principle that target heavy metal in smoke is not adsorbed.
Preferably, the circulating water pump adopts a safe voltage DC24V, and can provide the flow and pressure required by cooling water when the system is used for supplying the maximum working flue gas flow and the maximum flue gas temperature. For conveying cooling water.
Preferably, the gas meter 14 is capable of measuring flue gas flow under high temperature, shock conditions, meeting test flow, pressure, and maximum range requirements.
Preferably, the air pump 15 can be directly connected with a 220V alternating current circuit of a mains supply, the air pumping pressure and the air pumping flow meet the test requirements, and the air pump can stably run in the field high-temperature and vibration environment test.
The coal-fired flue gas comprises flue gas of a coal-fired boiler, a sludge-fired boiler, a municipal refuse-fired boiler and the like, and the heavy metals comprise arsenic, lead, selenium, chromium, cadmium, copper, zinc, nickel, iron, antimony and the like. The utility model discloses a heavy metal adsorption sampling device, except adsorbing the heavy metal, still include other mineral matter element's such as alkali metal, alkaline earth metal, sulphur, chlorine absorption sample.
The utility model discloses a coal-fired flue gas heavy metal adsorption and integrative sampling device of flue gas component analysis, the theory of operation as follows:
s1: before sampling, unscrewing a protective cover 1, selecting an inner core short pipe and a high-temperature filter core which are made of corresponding materials, sequentially installing the inner core short pipe and the high-temperature filter core on an inner pipe 2, weighing a certain mass of adsorbent particles to fill a gas-phase heavy metal adsorption chamber after a second high-temperature filter core 6 and a second inner core short pipe 5 are sequentially installed, sequentially installing a first high-temperature filter core 4 and a first inner core short pipe 3, and installing and screwing the protective cover 1;
s2: connecting a circulating water pipeline and turning on a circulating water pump 12; circulating water enters through a cooling water inlet 11 at the lower end of the outer pipe 8 and flows out through a cooling water outlet 10;
s3: during sampling, the sampling section is placed into the flue gas through a boiler flue gas preformed hole, after the preparation work is finished, the air suction pump 15 is started, the volume of the flue gas flowing through the air suction pump is measured by the gas flowmeter 14, at the moment, the air outlet end of the air suction pump 15 can be connected with equipment for online detection of flue gas components such as a flue gas analyzer, and the flue gas component analysis can be finished while heavy metal sampling is carried out;
s4: and after the adsorption reaction is carried out for 1-60min, taking out the sampling device, cooling, opening the protective cover 1, and respectively collecting the particles in the first inner core short pipe 3 and the adsorbent particles in the second inner core short pipe 5 for subsequent further analysis and test, wherein the used inner core short pipe and the high-temperature filter element are cleaned by deionized water and dilute acid and dried for later use.
The utility model discloses a coal-fired flue gas heavy metal adsorption and integrative sampling device of flue gas component analysis, its application method is through filling solid sorbent in the reaction tube to in sending into flue gas passageway, directly realize adsorbing the sample to the high temperature of flue gas heavy metal, solve the easy difficult problem of reaction of heavy metal sampling process, prevent that the heavy metal from gathering in advance in the flue gas and condensing or reacting with the sampler pipeline, make the adsorption reaction ration more accurate, for the chemical absorption method, the utility model discloses it is simple reliable, higher repeatability has.
Claims (9)
1. A coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device is characterized by comprising an inner pipe (2), wherein a first-stage step baffle (7) is arranged in the inner pipe (2) and divides the inner pipe into a sampling section and a flue gas channel section; wherein the content of the first and second substances,
a second high-temperature filter element (6), a second inner core short pipe (5), a first high-temperature filter element (4) and a first inner core short pipe (3) are sequentially arranged from the first-stage step baffle (7) to the top of the sampling section in a staggered mode, and a particulate matter collecting chamber is arranged between the first high-temperature filter element (4) and the first inner core short pipe (3) and used for adsorbing coal-fired flue gas particulate matters; a gas-phase heavy metal adsorption chamber is arranged between the second high-temperature filter element (6) and the second inner core short pipe (5), and adsorbent particles are filled in the gas-phase heavy metal adsorption chamber and are used for adsorbing gas-phase heavy metal in flue gas;
the flue gas passageway section is located sample section afterbody, just flue gas passageway section tail end and gas-supply pipe (13) fixed connection, be equipped with aspiration pump (15) on gas-supply pipe (13), just aspiration pump (15) are given vent to anger the end and are connected with the equipment of on-line measuring flue gas composition, realize flue gas composition integration analysis when coal-fired gas heavy metal adsorption.
2. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 1, wherein an outer pipe (8) is arranged on the outer wall of the flue gas channel section, a cooling water inlet (11) and a cooling water outlet (10) are respectively arranged at the tail of the outer pipe (8), and the cooling water inlet (11) is connected with a circulating water pump (12).
3. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 2, characterized in that a separation pipe parallel to the outer pipe (8) and the inner pipe (2) and having an opening at the top is arranged between the outer pipe and the inner pipe, a first heat exchange cooling water channel is formed between the inner pipe (2) and the separation pipe, and a second cold heat exchange cooling water channel is formed between the separation pipe and the outer pipe (8).
4. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 3, characterized in that a plurality of heat exchanger fins (9) are arranged between the inner pipe (2) and the separation pipe, and between the separation pipe and the outer pipe (8).
5. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 3 or 4, characterized in that the cooling water inlet (11) is arranged at the bottom of the first heat exchange cooling water channel, and the cooling water inlet (11) is arranged at the bottom of the second heat exchange cooling water channel.
6. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 5, characterized in that a protective cover (1) is arranged at the top end of the inner pipe (2), a plurality of flue gas flowing holes are arranged on the protective cover (1), and the outer wall of the other end is provided with threads which are matched with the internal threads of the inner pipe (2).
7. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 6, wherein the distance from the first-stage step baffle (7) to the bottom end of the cap sealing part of the protective cover (1) is greater than the sum of the thicknesses of the two high-temperature filter elements and the heights of the two inner core short pipes.
8. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 7, characterized in that a gas flowmeter (14) is further arranged on the gas conveying pipe (13).
9. The coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device according to claim 1 or 8, wherein the first high-temperature filter element (4) and the second high-temperature filter element (6) are respectively prepared from one of alumina, silica, high-temperature ceramics, alloys and glass fiber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921744234.1U CN211477766U (en) | 2019-10-17 | 2019-10-17 | Coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921744234.1U CN211477766U (en) | 2019-10-17 | 2019-10-17 | Coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device |
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| CN211477766U true CN211477766U (en) | 2020-09-11 |
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| CN201921744234.1U Active CN211477766U (en) | 2019-10-17 | 2019-10-17 | Coal-fired flue gas heavy metal adsorption and flue gas component analysis integrated sampling device |
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