CN109541122B - Device and method for observing aging process of biomass combustion flue gas - Google Patents
Device and method for observing aging process of biomass combustion flue gas Download PDFInfo
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- CN109541122B CN109541122B CN201811313045.9A CN201811313045A CN109541122B CN 109541122 B CN109541122 B CN 109541122B CN 201811313045 A CN201811313045 A CN 201811313045A CN 109541122 B CN109541122 B CN 109541122B
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- flue gas
- smoke
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- concentrator
- aging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The device for observing the aging process of the biomass combustion flue gas consists of an air supply unit, a flue gas generating unit and an aging reaction box; the humidity generator nitrogen tank is connected with a gas inlet of the humidity generator to form a gas supply unit, the humidity generator (2) is connected with a smoke generating unit, the smoke generating unit is connected with an aging reaction tank, and the aging reaction tank is connected with a tail gas treatment bottle; the flue gas generating unit comprises a glass cover, a tower-shaped biomass fuel and a flue gas concentrator, wherein the flue gas concentrator is arranged in the glass cover. The invention utilizes the tower aroma flue gas backflow principle to observe and collect the flue gas particle components after the biomass fuel is combusted, can control the carbon smoke dilution ratio, and has great significance for researching the carbon emission factors, chemical compositions and biological effects of different biomass fuels and simulating the aging process of the biomass fuels.
Description
Technical Field
The invention belongs to the field of carbon smoke research, and particularly relates to a device and a method for observing a biomass combustion smoke aging process.
Background
At present, the research on flue gas generated by biomass combustion mainly depends on outdoor sampling, and the research report on obtaining black carbon by continuous combustion in a laboratory is less. In the prior art, a relatively high cost or a complex treatment technology is required for obtaining the soot particles through flame simulation combustion, so that the research efficiency of the soot single particles is reduced, and the particles obtained through the simulation combustion are easy to agglomerate, so that the application of the soot particles in the aspect of sampling is limited.
Disclosure of Invention
The invention provides a simple and easy biomass soot preparation device and a method for removing tar and sampling soot particles, and relatively pure soot particles are obtained, so that independent analysis and research are carried out on the soot particles.
The technical scheme of the invention is as follows:
a device for observing the aging process of biomass combustion flue gas comprises a gas supply unit, a flue gas generation unit and an aging reaction box. The gas supply unit is connected with the smoke generation unit, and the smoke generation unit is connected with the aging reaction box.
The air supply unit is formed by connecting a nitrogen tank with a humidity generator; the gas inlet of the nitrogen tank is connected with the gas inlet of the humidity generator to form a gas supply unit, the outlet pipe of the humidity generator is connected with the smoke generation unit, and the smoke generation unit comprises tower-shaped biomass fuel, a smoke concentrator and a glass cover; and (3) aging the carbon smoke particles through reaction with external gas distribution, and treating the residual smoke after the aged particles are collected by a tail gas treatment bottle.
The humidity generator is an Alos SHG-AT01 type environmental humidity generator in Suzhou and is used for controlling the humidity of gas or the water content, and the humidity range is 5% -95% RH; the nitrogen flow, the temperature and the humidity can be digitally set and displayed, the temperature display precision is +/-1 ℃, and the humidity display precision is +/-2% RH.
The glass cover is a transparent sealing box body with the length of 200 mm, the width of 200 mm and the height of 300mm, the top end of the box body is provided with a shaft hole, one side of the box body is provided with a smoke inlet, and the other side of the box body is provided with a smoke outlet.
The tower-shaped biomass fuel is directly combustible biomass fuel prepared by crushing, mixing, extruding and drying straw and sawdust, and is hollow round table with small upper part and large lower part, wherein the diameter of the upper bottom surface of the round table is 4mm, the diameter of the lower bottom surface of the round table is 26mm, and the height of the round table is 60mm; the solid hemispheroids with the diameter of 3mm are arranged on the upper bottom surface of the round table, cone-shaped blind holes are formed in the axis of the round table, the diameter of the blind holes in the lower bottom surface of the round table is 8mm, and the depth of the blind holes is 55mm.
The flue gas concentrator is a hollow cylinder with a thick upper part, a thin lower part and an open lower part, the upper part is provided with a top cover, the top cover is provided with an air inlet hole and a shaft hole, and a hollow center shaft is arranged on the shaft hole and positioned below the top cover; a circular fixing seat is arranged on the top cover and at the position of the shaft hole, a hollow supporting column is arranged on the fixing seat, a tower-shaped biomass fuel is arranged on the supporting column, and the supporting column, the fixing seat and the central shaft are concentric; the support column passes through the fixing seat and is connected with the central shaft to form a pore canal; an ash collecting groove for receiving ash is arranged along the periphery of the support column, and a micro turbine is arranged on the side face of the flue gas concentrator.
The microturbine may accelerate the flue gas concentration while disturbing the flue gas to reduce particulate accumulation.
The lower part of the aging reaction box is provided with a sampling hole which can be used for sample collection, and the two air distribution holes above can be used for artificially introducing external air to simulate the static aging process of the carbon smoke particles in the aging reaction box.
The solution in the tail gas treatment bottle is ethanol or isopropanol water solution (volume concentration w is more than 80%); a filter screen is arranged at the gas-liquid interface in the bottle, undissolved soot is blocked by the filter screen and collected on the filter membrane, and the pore diameter of the filter membrane is 0.5-2 mu m.
The device provided by the invention has the advantages of simple structure, convenience in use, low manufacturing cost, wide applicability and higher safety level, and realizes the sampling of the carbon smoke particles to obtain relatively pure carbon smoke particles, so that the carbon smoke particles are independently analyzed and researched.
Drawings
Fig. 1 is a schematic diagram of the overall connection of the present invention.
Fig. 2 is a block diagram of a flue gas concentrator in accordance with the present invention.
Fig. 3 is a top view of fig. 2.
In the figure, a 1-nitrogen tank, a 2-humidity generator, a 3-glass cover, 4-tower-shaped biomass fuel, a 5-flue gas concentrator, a 10-aging reaction box, an 11-sampling port, a 12-gas distribution port, a 13-tail gas treatment bottle, a 14-filter screen, a 501-support column, a 502-central shaft, a 503-fixing seat, a 504-vent hole, a 505-microturbine and a 506-ash collecting tank.
Detailed Description
FIG. 1 shows a device for observing the aging process of biomass combustion flue gas, which comprises a gas supply unit, a flue gas generation unit and an aging reaction box; the gas supply unit is connected with the smoke generation unit, the smoke generation unit is connected with the aging reaction box, and the aging reaction box is connected with the tail gas treatment bottle; the air supply unit is formed by connecting a nitrogen tank 1 and a humidity generator 2 through a pipeline, and an outlet pipe of the humidity generator 2 is connected with a glass cover of the smoke generation unit; the flue gas generating unit comprises a glass cover 3, a tower-shaped biomass fuel 4 and a flue gas concentrator 5, wherein the tower-shaped biomass fuel 4 is arranged at the upper part of the flue gas concentrator 5;
the flue gas enters an aging reaction box 10, the carbon smoke reacts with external gas distribution to age, and the aged carbon smoke particles are collected and the residual flue gas is treated by a tail gas treatment bottle 13.
Example 1: FIG. 1 shows a device for observing the aging process of biomass combustion flue gas, which comprises a gas supply unit, a flue gas generation unit and an aging reaction box 10; the humidity generator 2 is connected with a smoke generating unit, the smoke generating unit is connected with an aging reaction box 10, and the aging reaction box 10 is connected with a tail gas treatment bottle 13; the outlet pipe of the humidity generator 2 is connected with the glass cover 3 of the smoke generating unit; the flue gas generating unit comprises a glass cover 3, tower-shaped biomass fuel 4 and a flue gas concentrator 5, wherein the flue gas concentrator 5 is arranged in the glass cover 3; the tower-shaped biomass fuel 4 is arranged at the upper part of the flue gas concentrator 5;
the high efficiency filter is installed or not installed in front of the air inlet 1.
The shape of the flue gas concentrator 5 is a reversed cowpea, the inside of the flue gas concentrator is a cylinder with a cavity, the top end is larger, the tail end is smaller, the height is 311mm, and the top of the flue gas concentrator 5 is provided with a top cover with an opening at the bottom; the cross section of the top end is a round with the diameter of 173mm, and the cross section of the tail end is a round with the diameter of 28 mm; the diameter of the top cover at the top end is 161mm, the center of the top cover is provided with a shaft hole with the aperture of 20mm, the top cover is also provided with a plurality of fume input ports 504, and a center shaft 502 is arranged on the shaft hole and positioned below the top cover; a circular fixing seat 503 is arranged on the top cover and at the position of the shaft hole, a support column 501 is arranged on the fixing seat 503, the upper end of the support column 501 passes through the glass cover 3 and extends out of the glass cover, a tower-shaped biomass fuel 4 is arranged on the support column 501, and the support column 501, the fixing seat 503 and the central shaft 502 are concentric; the middle shaft is hollow, and the aperture of the middle shaft is 10mm; the support column 501 is hollow;
the inner diameter of the circular fixing seat 503 is 20mm and the outer diameter is 48mm.
The lower end of the support column 501 passes through the fixing seat 501 and is connected with the middle shaft 502 to form a pore canal; the flue gas inlet 504 is 4mm in caliber; an ash collecting groove 506 for receiving ash is arranged along the periphery of the supporting column 501, and the edge of the ash collecting groove 506 is upwards convex to form a basin shape with a convex inner edge;
the outer diameter of the ash collecting groove 506 is 50mm, the radian of the outer curved surface of the flue gas concentrator is 80 degrees, the radian of the inner curved surface is 90 degrees, and the side surface of the flue gas concentrator is provided with the micro turbine 505.
The aging reaction box 10 can also be a plurality of serially connected ones, and the aging influence of different gases on the particulate matters in the flue gas can be studied respectively.
The humidity generator 2 is an aloss SHG-AT01 ambient humidity generator, su.
The tail gas treatment bottle 13 has a cylindrical bottle body with a diameter of 81mm and a height of 114mm and has a volume of 500ml.
The working chamber dimensions d×w×h (mm) of the aging reaction chamber 10: 450×450×500.
The ageing reaction box 10 is internally inserted with a plurality of baffle plates, a plurality of through holes are arranged on the baffle plates, the through holes of the baffle plates are arranged in a staggered way, a plurality of guide plates are arranged on the baffle plates for guiding the flue gas and intercepting and capturing the powder on the baffle plates, and a plurality of rows of spirally wound cooling pipes are arranged in the box body.
A method of observing a biomass combustion flue gas aging process comprising the steps of:
1. the nitrogen tank 1, the humidity generator 2, the smoke generation unit, the aging reaction box 10 and the tail gas treatment bottle 13 are sequentially arranged, and according to actual needs, the horizontal connection among all the components is further included, and the vertical connection, the left connection and the right connection are further included.
2. After the tower-shaped biomass fuel is ignited for 4 to 4 minutes, the flue gas flows out from the outlet of the flue gas concentrator 5, and the micro turbine begins to concentrate the flue gas and suck air at the same time, so that the flue gas is diluted, and the aggregation of carbon smoke particles can be avoided. The flue gas flows towards the aging reaction box 10 under the pushing of the air flow.
3. The flue gas enters an aging reaction box 10. A sampling hole 11 is arranged below the aging reaction box 10 and is used for collecting samples; an air distribution hole 12 is arranged above the aging reaction chamber 10 for simulating the static aging process of the soot particles by artificially introducing external air. And controlling variables (temperature, humidity and gas mixing ratio) according to research requirements, carrying out sample collection for a plurality of times, and recording the conditions in the box. The sample is stored in a sealed dry mode.
4. Taking a test tube, preparing an 80% ethanol aqueous solution from ethanol and deionized water according to a ratio of 4:1, transferring the aqueous solution to a tail gas treatment bottle 13, absorbing tail gas to obtain a suspension, and blocking undissolved soot by a filter membrane and collecting the undissolved soot on the filter membrane 14.
5. The biomass adsorbent is used as a raw material for combustion after being used, so that secondary pollution is prevented. The filter membrane for collecting the carbon smoke is subjected to ultrasonic dispersion, extraction and drying to obtain purified solid carbon smoke, and the purified solid carbon smoke is reused for other related researches.
Claims (1)
1. The device for observing the aging process of the biomass combustion flue gas is characterized by comprising a gas supply unit, a flue gas generation unit and an aging reaction box; the gas supply unit is connected with the smoke generation unit, the smoke generation unit is connected with the aging reaction box (10), and the aging reaction box (10) is connected with the tail gas treatment bottle (13); the gas supply unit is formed by connecting a nitrogen tank (1) with a humidity generator (2), the smoke generation unit comprises a glass cover (3), a tower-shaped biomass fuel (4) and a smoke concentrator (5), and the smoke concentrator (5) is arranged in the glass cover (3);
the flue gas concentrator (5) is a hollow cylinder with a thick upper part, a thin lower part and an open lower part, the upper part is provided with a top cover, the top cover is provided with a flue gas input port (504) and a shaft hole, and the hollow center shaft (502) is arranged on the shaft hole and positioned below the top cover; a circular fixing seat (503) is arranged on the top cover and at the position of the shaft hole, a hollow supporting column (501) is arranged on the fixing seat (503), a tower-shaped biomass fuel (4) is arranged on the supporting column (501), and the supporting column (501), the fixing seat (503) and the middle shaft (502) are concentric; the support column (501) passes through the fixing seat (503) and is connected with the middle shaft (502) to form a pore canal; an ash collecting groove (506) for receiving ash is arranged along the periphery of the supporting column (501), and a micro turbine (505) is arranged on the side surface of the flue gas concentrator; the humidity range of the humidity generator (2) is 5% -95% RH; the glass cover (3) is a transparent sealing box body with the length of 300mm, the width of 300mm and the height of 400mm, the top end of the box body is provided with a shaft hole, one side of the box body is provided with a smoke inlet, and the other side of the box body is provided with a smoke outlet; the tower-shaped biomass fuel (4) is prepared by crushing, mixing and extruding straws and sawdust; the drying process is adopted, the prepared directly-combustible biomass briquette fuel (4) is in a hollow truncated cone shape with a small upper part and a large lower part, the diameter of the upper bottom surface of the truncated cone is 4mm, the diameter of the lower bottom surface of the truncated cone is 26mm, and the height of the truncated cone is 60mm; the upper surface of the upper bottom surface of the round table is provided with a solid hemispheroid with the diameter of 4mm, the axis of the round table is provided with a cone-shaped blind hole, the diameter of the blind hole positioned on the lower bottom surface of the round table is 8mm, and the depth of the blind hole is 55mm; the lower part of the aging reaction box (10) is provided with a sampling hole (11), and the upper part is provided with two air distribution holes (12); the solution in the tail gas treatment bottle (13) is ethanol or isopropanol water solution; a filter screen (14) is arranged at the gas-liquid interface in the bottle, the filter screen (14) is provided with a filter membrane, and the aperture of the filter screen is 0.5-2 mu m;
the ageing reaction box (10) is characterized in that a plurality of partition boards are inserted into the box body, a plurality of through holes are formed in the partition boards, the through holes of the partition boards are arranged in a staggered mode, a plurality of guide sheets are arranged on the partition boards, guide smoke and intercept and trap powder on the partition boards, and a plurality of rows of spirally-wound cooling pipes are arranged in the box body;
the method for observing the aging process of the biomass combustion flue gas comprises the following steps:
(1) Starting a humidity generator and presetting a humidity value RH0 to be 15% -80%; starting a nitrogen tank, observing the flow through a digital display on a humidity generator, and continuously introducing nitrogen for 3 to 5 minutes to remove residual gas;
(2) Igniting the tower-shaped biomass fuel, and after 3-4 minutes, enabling the flue gas to flow out from an outlet of a flue gas concentrator, starting a micro turbine to concentrate the flue gas, sucking nitrogen at the same time, diluting the flue gas by the nitrogen, avoiding aggregation of carbon smoke particles, and simultaneously using the nitrogen as a protective gas to prevent the carbon smoke particles from reacting with air; the flue gas is concentrated at the outlet of the flue gas concentrator under the pushing of the air flow;
(3) Taking a test tube, preparing ethanol and deionized water into an 80% ethanol water solution according to the ratio of 4:1, transferring the ethanol water solution to a tail gas treatment bottle (13) to absorb tail gas to obtain a suspension, blocking undissolved soot by a filter screen, collecting the soot on a filter membrane, and carrying out ultrasonic dispersion, extraction and drying on the filter membrane by ultrasonic waves to obtain purified solid soot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811313045.9A CN109541122B (en) | 2018-11-06 | 2018-11-06 | Device and method for observing aging process of biomass combustion flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811313045.9A CN109541122B (en) | 2018-11-06 | 2018-11-06 | Device and method for observing aging process of biomass combustion flue gas |
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| Publication Number | Publication Date |
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| CN109541122A CN109541122A (en) | 2019-03-29 |
| CN109541122B true CN109541122B (en) | 2023-09-29 |
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2018
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| DE2427921B1 (en) * | 1974-06-10 | 1975-07-10 | Heraeus Gmbh W C | Analysis of liquids for elements - in a combustion tube with pre-vaporising section and automatically controlled heater |
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| CN109541122A (en) | 2019-03-29 |
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