CN109812579B - Dropper furnace for test and self-cooling sealing device thereof - Google Patents
Dropper furnace for test and self-cooling sealing device thereof Download PDFInfo
- Publication number
- CN109812579B CN109812579B CN201910179365.8A CN201910179365A CN109812579B CN 109812579 B CN109812579 B CN 109812579B CN 201910179365 A CN201910179365 A CN 201910179365A CN 109812579 B CN109812579 B CN 109812579B
- Authority
- CN
- China
- Prior art keywords
- heat pipe
- disc
- evaporation section
- heat
- sealing gasket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 88
- 238000001816 cooling Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000001704 evaporation Methods 0.000 claims abstract description 83
- 230000008020 evaporation Effects 0.000 claims abstract description 83
- 238000009833 condensation Methods 0.000 claims abstract description 44
- 230000005494 condensation Effects 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims description 64
- 238000010438 heat treatment Methods 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 239000008399 tap water Substances 0.000 abstract description 5
- 235000020679 tap water Nutrition 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 22
- 238000002485 combustion reaction Methods 0.000 description 13
- 238000010248 power generation Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a dropper furnace for a test and a self-cooling sealing device thereof, and relates to the field of dropper furnaces for tests. The test dropper furnace of the invention comprises: the self-cooling sealing device comprises a separated heat pipe consisting of a heat pipe condensation section, a heat pipe evaporation section I and a heat pipe evaporation section II. The invention aims to overcome the defects of high operation and maintenance cost of a cooling device at a sealing gasket on the conventional burette furnace for the test, and provides the burette furnace for the test and the self-cooling sealing device thereof, which have lower operation and maintenance cost compared with the traditional tap water circulating cooling mode.
Description
Technical Field
The invention relates to the field of test dropper furnaces, in particular to a test dropper furnace and a self-cooling sealing device thereof.
Background
Coal is used as main primary energy in China, wherein coal-fired power generation accounts for 80% of the total power generation, and although the proportion of coal-fired power generation is reduced along with the increasing use of new energy power generation such as wind power generation, solar power generation and the like, coal-fired power still accounts for most of the total power generation, so that people still need to pay attention to coal-fired power generation and a series of pollutant emission problems caused by the coal-fired power generation. According to the heat-engine plant atmospheric pollutionEmission standards for dyeing (GB 13223-2011) requiring NO x 、SO 2 And smoke emission limit values of 50mg/m respectively 3 、35mg/m 3 、10mg/m 3 The ultra-low emission policy is fully implemented in china. The related report shows that NO generated in the energy field in China at present x The pollutant discharge amount is the first in the world, and the environmental pollution problem caused by the pollutant discharge amount is quite serious. Therefore, the generation characteristics and migration mechanisms of harmful substances in the coal combustion process are deeply researched, and an important theoretical basis can be provided for clean and efficient utilization of coal in actual industry.
The design of the one-dimensional dropper furnace experimental device provides a good experimental platform for researching the combustion characteristics of fuels such as coal dust, biomass and the like in a laboratory, however, the existing one-dimensional dropper furnace reaction tube and the upper disc and the lower disc are sealed by adopting sealing gaskets, the sealing gaskets made of high-temperature-resistant flexible graphite-clamped metal materials are mostly used at present, the sealing effect of the gaskets is good, but the high-temperature-resistant performance is relatively poor, the critical working temperature is not higher than 800 ℃, and meanwhile, the temperature of the reaction tube needs to reach 1600 ℃ because the dropper furnace works in a high-temperature environment, and the gaskets need to be cooled so as to ensure the safety performance of experiments and the authenticity and accuracy of experimental results. In the prior art, a tap water circulating cooling mode is basically adopted to cool the sealing gasket, so that the cooling effect is poor, the cooling time is long, a large amount of water resources are wasted, and the running and maintenance costs are high.
Regarding the cooling protection device at the sealing gasket, related technical solutions have been disclosed in the prior art, for example, patent publication No.: CN101994075a, publication date: the invention is named as 2011, 03 months and 30 days: the application discloses a rubber sealing gasket gas cooling protection device, wherein a large cover plate is arranged above the top of a furnace body, a groove-shaped sealing cavity is arranged at the top of the furnace body, a rubber sealing gasket is placed in the sealing cavity, a gas flow channel is arranged on the outer layer of the cavity wall of the sealing cavity to reduce the temperature of the sealing cavity, and an air flow through hole is formed in the gas flow channel; the large cover plate is provided with a downwards-protruding furnace cover flange which is hollow to form an airflow cavity, and the large cover plate is provided with an airflow through hole communicated with the airflow cavity. According to the application, the semi-foaming silicon rubber sealing gasket is supported, the gas flow channel is arranged on the periphery of the sealing gasket, the temperature of the cavity in direct contact with the sealing gasket is reduced through gas flow, the sealing gasket works in a proper temperature range, the phenomenon that the rubber sealing gasket is easy to overheat and age is effectively prevented, and the ideal use effect is achieved. However, this application has the disadvantage that: in order to maintain the sealing gasket to work in a proper temperature range, air flow is always required to be introduced into the air flow channel, and the operation and maintenance costs are high.
In summary, how to overcome the defect of high operation and maintenance cost of the cooling device at the sealing gasket of the dropper furnace for the prior test is a technical problem to be solved in the prior art.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects of high operation and maintenance cost of a cooling device at a sealing gasket on the conventional burette furnace for the test, and provides the burette furnace for the test and the self-cooling sealing device thereof, which have lower operation and maintenance cost compared with the traditional tap water circulating cooling mode.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the test dropper furnace of the invention comprises:
the reaction tube, the outer surface of this reaction tube surrounds and is provided with the heating layer, the heating layer is covered in body, the inner surface of body and said heating layer are filled with the insulating layer between the outer surface; the upper end of the reaction tube extends to the outer side of the heat insulation layer, the upper end of the reaction tube is connected with a first disc which is matched with a second disc on the upper side of the reaction tube, and a first sealing gasket is clamped between the first disc and the second disc; at least two fastening bolts sequentially penetrate through the second disc and the first disc from top to bottom and then are in threaded connection with the heat insulation layer, and each fastening bolt at the upper end of the reaction tube is matched with a fastening nut positioned above the second disc; the lower end of the reaction tube extends to the outer side of the heat insulation layer, the lower end of the reaction tube is connected with a third disc which is matched with a fourth disc at the lower side of the reaction tube, and a second sealing gasket is clamped between the third disc and the fourth disc; at least two fastening bolts sequentially pass through the fourth disc and the third disc from bottom to top and are in threaded connection with the heat insulation layer, and each fastening bolt at the lower end of the reaction tube is matched with a fastening nut positioned below the fourth disc;
a blanking pipe sequentially passes through the second disc, the first sealing gasket and the first disc from top to bottom and then enters the reaction pipe;
at least one secondary air inlet pipe, wherein each secondary air inlet pipe sequentially passes through the second disc, the first sealing gasket and the first disc from top to bottom and then enters the reaction pipe;
the sampling tube sequentially passes through the fourth disc, the second sealing gasket and the third disc from bottom to top and then enters the reaction tube;
the self-cooling sealing device comprises a separated heat pipe consisting of a heat pipe condensation section, a heat pipe evaporation section I and a heat pipe evaporation section II, wherein the heat pipe condensation section is cylindrical, an annular cavity in the heat pipe condensation section is a working medium circulation channel, the inner surface of each heat pipe condensation section is provided with external threads, the outer surface of each secondary air inlet pipe is provided with external threads, and the outer surface of each secondary air inlet pipe is in threaded connection with a heat pipe condensation section which surrounds the outer side of the secondary air inlet pipe; the first heat pipe evaporation section and the second heat pipe evaporation section are cylindrical, annular cavities in the first heat pipe evaporation section and the second heat pipe evaporation section are working medium circulation channels, the first heat pipe evaporation section is enclosed on the outer side of the first sealing gasket, and the second heat pipe evaporation section is enclosed on the outer side of the second sealing gasket.
As a further improvement of the invention, the device also comprises a first air tank and a powder feeder, wherein the first air tank is communicated with the powder feeder through a pipeline, and a flowmeter and a safety valve are arranged on a pipeline for communicating the first air tank with the powder feeder.
As a further improvement of the invention, the air-conditioning system further comprises at least two second air tanks, all the second air tanks are respectively communicated with the air mixing tank through pipelines, a flowmeter and a safety valve are arranged on the pipeline for communicating each second air tank with the air mixing tank, and the air mixing tank is respectively communicated with each secondary air inlet pipe through the pipeline.
As a further improvement of the invention, the lower end of the sampling tube is communicated with one end of the sampler, and the other end of the sampler is sequentially communicated with the filter and the safety valve through the pipeline.
As a further development of the invention, the heating layer is connected to a temperature-controlled tank.
As a further improvement of the invention, each heat pipe condensation section is respectively communicated with the heat pipe evaporation section through a heat pipe connecting pipeline, and the heat pipe evaporation section I is communicated with the heat pipe evaporation section II through a heat pipe connecting pipeline.
As a further improvement of the invention, the inner surface of each secondary air inlet pipe is provided with a plurality of ribs.
As a further improvement of the invention, a plurality of fins are arranged in the working medium circulation channel of the condensing section of the heat pipe.
As a further improvement of the invention, the first heat pipe evaporation section and the second heat pipe evaporation section are filled with silk screens.
The invention relates to a self-cooling sealing device of a dropper furnace for a heating test, which comprises a separated heat pipe consisting of a heat pipe condensation section, a first heat pipe evaporation section and a second heat pipe evaporation section, wherein the heat pipe condensation section is cylindrical, an annular cavity in the heat pipe condensation section is a working medium circulation channel, the inner surface of each heat pipe condensation section is provided with external threads, the outer surface of each secondary air inlet pipe is provided with external threads, and the outer surface of each secondary air inlet pipe is in threaded connection with a heat pipe condensation section which surrounds the outer side of the secondary air inlet pipe; the first heat pipe evaporation section and the second heat pipe evaporation section are cylindrical, annular cavities in the first heat pipe evaporation section and the second heat pipe evaporation section are working medium circulation channels, the first heat pipe evaporation section is enclosed on the outer side of the first sealing gasket, and the second heat pipe evaporation section is enclosed on the outer side of the second sealing gasket.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
the self-cooling sealing device comprises a separated heat pipe consisting of a heat pipe condensation section, a heat pipe evaporation section I and a heat pipe evaporation section II, wherein the separated heat pipe adopts a separated structure, the condensation section for heat dissipation of working media is the heat pipe condensation section, the evaporation section for heat absorption of working media is the heat pipe evaporation section I and the heat pipe evaporation section II, heat of a sealing gasket I at the upper end of a reaction pipe and a sealing gasket II at the lower end of the reaction pipe is conducted to each secondary air inlet pipe, the sealing gasket I and the sealing gasket II can work in a reasonable temperature interval, absorbed heat can be simultaneously transferred to secondary air flowing in each secondary air inlet pipe, heat is recovered, and heat exchange of the heat pipe is lower in operation and maintenance cost compared with a traditional tap water circulating cooling mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the structure of a drop tube furnace for test in an embodiment;
FIG. 2 is a schematic view showing a sectional structure at an upper end of a reaction tube in an embodiment;
FIG. 3 is a schematic view showing a sectional structure at a lower end of a reaction tube in an embodiment;
FIG. 4 is a schematic cross-sectional view (taken along the axial direction) of a secondary air intake pipe according to an embodiment;
FIG. 5 is a schematic cross-sectional structural view (taken along the axial direction) of the condensing section of the heat pipe in the embodiment;
FIG. 6 is a schematic view (taken along radial direction) of a cross-sectional structure of a first evaporator end of a heat pipe in an embodiment;
FIG. 7 is a schematic view of a first embodiment of a seal gasket;
FIG. 8 is a schematic structural view of a second embodiment of a sealing gasket;
FIG. 9 is a flow chart of a method of using the test drop tube oven in an embodiment.
Reference numerals in the schematic drawings illustrate: 1. a first gas tank; 2. a second gas tank; 3. a flow meter; 4. a safety valve; 5. a gas mixing tank; 6. a housing; 7. a heat preservation layer; 8. a heating layer; 9. a temperature control box; 10. a sampler; 11. a sampling tube; 12. a filter; 13. a safety valve; 14. a powder feeder; 15. discharging pipes; 16. a second sealing gasket; 17. a second heat pipe evaporation section; 18. a fastening bolt; 19. a reaction tube; 20. a secondary air inlet pipe; 21. a heat pipe connecting pipe; 22. a fastening nut; 23. a second disc; 24. a first disc; 25. a first sealing gasket; 26. a heat pipe condensing section; 27. a first heat pipe evaporation section; 2701. a silk screen; 28. a third disc; 29. and a fourth disc.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
Example 1
Referring to fig. 1 to 8, the drop tube furnace for test of the present embodiment includes:
the reaction tube 19 (the reaction tube 19 is made of quartz material and is vertically arranged in the middle of the shell 6), the heating layer 8 is arranged around the outer surface of the reaction tube 19, the heating layer 8 is sleeved in the shell 6 (the heating layer 8 is used for heating the reaction tube 19 and can be a heating resistance wire), and a heat preservation layer 7 is filled between the inner surface of the shell 6 and the outer surface of the heating layer 8 (the heat preservation layer 7 is used for preserving heat of the reaction tube 19 and ensuring that the temperature in the reaction tube 19 meets experimental requirements); the upper end of the reaction tube 19 extends to the outer side of the heat insulation layer 7, the upper end of the reaction tube 19 is connected with a first disc 24, the first disc 24 is matched with a second disc 23 on the upper side of the reaction tube, and a first sealing gasket 25 is clamped between the first disc 24 and the second disc 23; the two fastening bolts 18 sequentially pass through the second disc 23 and the first disc 24 from top to bottom and then are in threaded connection with the heat insulation layer 7, and each fastening bolt 18 at the upper end of the reaction tube 19 is matched with a fastening nut 22 positioned above the second disc 23, when the reaction tube is used, the two fastening nuts 22 are screwed in the direction of the second disc 23, so that the second disc 23, the first sealing gasket 25 and the first disc 24 are tightly pressed together, and effective sealing between the second disc 23 and the first disc 24 is ensured; the lower end of the reaction tube 19 extends to the outer side of the heat insulation layer 7, the lower end of the reaction tube 19 is connected with a third disc 28, the third disc 28 is matched with a fourth disc 29 at the lower side of the reaction tube, and a second sealing gasket 16 is clamped between the third disc 28 and the fourth disc 29; the two fastening bolts 18 sequentially pass through the fourth disc 29 and the third disc 28 from bottom to top and then are in threaded connection with the heat insulation layer 7, and each fastening bolt 18 at the lower end of the reaction tube 19 is matched with a fastening nut 22 positioned below the fourth disc 29, when the reaction tube is used, the two fastening nuts 22 are screwed in the direction of the fourth disc 29, so that the fourth disc 29, the second sealing gasket 16 and the third disc 28 are tightly pressed together, and effective sealing between the fourth disc 29 and the third disc 28 is ensured;
a blanking pipe 15, wherein the blanking pipe 15 sequentially passes through the second disc 23, the first sealing gasket 25 and the first disc 24 from top to bottom and then enters the reaction pipe 19;
at least one secondary air inlet pipe 20, wherein each secondary air inlet pipe 20 sequentially passes through the second disc 23, the first sealing gasket 25 and the first disc 24 from top to bottom and then enters the reaction pipe 19;
the sampling tube 11 sequentially passes through the fourth disc 29, the second sealing gasket 16 and the third disc 28 from bottom to top and then enters the reaction tube 19 (the sampling tube 11 is fixed in the reaction tube 19, powder materials after combustion reaction at different positions in the reaction tube 19 can be collected at different heights, and tail gas generated by combustion can be discharged along the sampling tube 11);
the self-cooling sealing device comprises a separated heat pipe consisting of a heat pipe condensation section 26, a first heat pipe evaporation section 27 and a second heat pipe evaporation section 17, wherein the heat pipe condensation section 26 is cylindrical, an annular cavity in the heat pipe condensation section 26 is a working medium circulation channel, the inner surface of each heat pipe condensation section 26 is provided with external threads, the outer surface of each secondary air inlet pipe 20 is in threaded connection with the heat pipe condensation section 26 surrounding the outer side of the secondary air inlet pipe 20, and the structural design of the heat pipe condensation section 26 facilitates the installation of the heat pipe condensation section 26 on the outer side of the secondary air inlet pipe 20, and enlarges the heat conduction contact area between the heat pipe condensation section 26 and the secondary air inlet pipe 20, so that the heat transfer efficiency between the heat pipe condensation section 26 and the secondary air inlet pipe 20 is effectively enlarged; the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 are cylindrical, annular cavities in the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 are working medium circulation channels, the first heat pipe evaporation section 27 is enclosed on the outer side of the first sealing gasket 25, the second heat pipe evaporation section 17 is enclosed on the outer side of the second sealing gasket 16, the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 are structurally designed, on one hand, the installation of the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 is facilitated, on the other hand, the first heat pipe evaporation section 27 is completely enclosed on the outer side of the first sealing gasket 25, the second heat pipe evaporation section 17 is completely enclosed on the outer side of the second sealing gasket 16, and the first sealing gasket 25 and the second sealing gasket 16 can be effectively radiated; wherein: each heat pipe condensation section 26 is respectively communicated with a first heat pipe evaporation section 27 through a heat pipe connecting pipeline 21, and the first heat pipe evaporation section 27 is communicated with a second heat pipe evaporation section 17 through a heat pipe connecting pipeline 21, so that the heat pipe condensation sections 26, the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 are connected in series into a whole, and the effect of a complete heat pipe is effectively exerted: the gaseous working medium is changed into liquid after being released in each heat pipe condensation section 26 and then flows into the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17, the liquid working medium absorbs heat and evaporates into gas in the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17, the gaseous working medium reaches each heat pipe condensation section 26 to release heat again, so that the phase change circulation of the working medium is completed, and heat at the first sealing gasket 25 and the second sealing gasket 16 is continuously discharged; the inner surface of each secondary air inlet pipe 20 is provided with a plurality of ribs, so that the heat exchange area between the secondary air and the inner surface of the secondary air inlet pipe 20 is increased, and the heat convection of the outer surface of the secondary air inlet pipe 20 is more efficiently transferred to the secondary air; the heat pipe condensation section 26 is internally provided with a plurality of fins, so that the heat exchange area between the working medium and the inner surface of the heat pipe condensation section 26 is increased, and the heat emitted by the phase change of the working medium is more efficiently transferred to the side wall of the heat pipe condensation section 26, thereby being beneficial to the efficient heat absorption of secondary air; the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 are filled with the silk screen 2701, and the design of the silk screen 2701 is beneficial to adsorbing the liquid working medium generated in the first heat pipe condensation section 26 into the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17, so that the evaporation and heat absorption processes of the liquid working medium in the first heat pipe evaporation section 27 and the second heat pipe evaporation section 17 are facilitated.
In this embodiment, the self-cooling sealing device includes a separate heat pipe composed of a heat pipe condensation section 26, a heat pipe evaporation section 27 and a heat pipe evaporation section 17, the separate heat pipe adopts a separate structure, the condensation section for heat dissipation of working medium is the heat pipe condensation section 26, the evaporation section for heat absorption of working medium is the heat pipe evaporation section 27 and the heat pipe evaporation section 17, which conduct the heat at the first sealing gasket 25 at the upper end of the reaction pipe 19 and the second sealing gasket 16 at the lower end of the reaction pipe 19 to each secondary air inlet pipe 20, so that the first sealing gasket 25 and the second sealing gasket 16 can work in a reasonable temperature interval, and meanwhile, the absorbed heat can be transferred to the secondary air circulating in each secondary air inlet pipe 20, so that the heat is recovered, and the heat exchange of the heat pipe is lower in operation and maintenance cost compared with the traditional tap water circulation cooling mode.
Example 2
The structure of the test drop tube oven of this example was substantially the same as that of example 1, and further: the experimental combustion process is characterized by further comprising a first air tank 1 and a powder feeder 14 (the powder feeder 14 is used for adding combustion powder into the reaction tube 19), the first air tank 1 is communicated with the powder feeder 14 through a pipeline, a flowmeter 3 and a safety valve 4 are arranged on the pipeline of the first air tank 1 communicated with the powder feeder 14, and the supply amount of primary air can be controlled through the cooperation of the flowmeter 3 and the safety valve 4, so that the experimental combustion process can be effectively controlled.
Example 3
The structure of the test drop tube oven of this example was substantially the same as that of example 2, and further: still include two at least second gas pitcher 2, all second gas pitcher 2 communicate with mixed gas pitcher 5 through the pipeline respectively, all be equipped with flowmeter 3 and relief valve 4 on the pipeline that every second gas pitcher 2 and mixed gas pitcher 5 communicate, mixed gas pitcher 5 communicates with every secondary air-supply line 20 respectively through the pipeline, can deposit different gases in every second gas pitcher 2, the supply of gas in every second gas pitcher 2 is controlled to the cooperation of accessible flowmeter 3 and relief valve 4 to form the controllable overgrate air of gas content in mixed gas pitcher 5, realize the effective control to experimental combustion process.
Example 4
The structure of the test drop tube oven of this example was substantially the same as that of example 3, and further: the lower extreme of sampling tube 11 communicates with the one end of sampler 10 (sampler 10 is used for receiving the powder after the combustion reaction from sampling tube 11), and the other end of sampler 10 communicates with filter 12, relief valve 13 through the pipeline in proper order, and filter 12 is used for filtering the solid powder in the combustion exhaust, and relief valve 13 is used for discharging final combustion exhaust.
Example 5
The structure of the test drop tube oven of this example was substantially the same as that of example 4, and further: the heating layer 8 is connected with the temperature control box 9, and the heating power of the heating layer 8 can be controlled through the temperature control box 9, so that the temperature in the reaction tube 19 can be effectively controlled, and the experiment can be effectively performed.
Referring to fig. 9, the method for using the test drop tube furnace of the present embodiment includes the following steps:
step A: preparing the burette furnace for the test;
and (B) step (B): the outer surface of each secondary air inlet pipe 20 is in threaded connection with a heat pipe condensation section 26 surrounding the outer side of the secondary air inlet pipe 20, a first heat pipe evaporation section 27 surrounds the outer side of a first sealing gasket 25, a second heat pipe evaporation section 17 surrounds the outer side of a second sealing gasket 16, each heat pipe condensation section 26 is respectively communicated with the first heat pipe evaporation section 27 through a heat pipe connecting pipeline 21, and the first heat pipe evaporation section 27 is communicated with the second heat pipe evaporation section 17 through the heat pipe connecting pipeline 21;
step C: heating the reaction tube 19 through the heating layer 8, simultaneously opening the first air tank 1 and the second air tank 2, enabling primary air to carry combustion powder into the reaction tube 19 through the blanking tube 15, enabling secondary air to enter the reaction tube 19 from each secondary air inlet tube 20, and enabling the combustion powder to start to burn in the reaction tube 19;
step D: when the temperature of the outer wall of the reaction tube 19 reaches the starting temperature of the working medium in the split type heat pipe, the split type heat pipe starts to start to work and continuously transmits the heat absorbed from the first sealing gasket 25 and the second sealing gasket 16 to the outer surface of each secondary air inlet pipe 20, and then the heat is absorbed by the secondary air passing through each secondary air inlet pipe 20, so that the first sealing gasket 25 and the second sealing gasket 16 work in a certain temperature range, the first sealing gasket 25 and the second sealing gasket 16 are protected, and the tightness of connection of the upper end and the lower end of the reaction tube 19 is ensured.
In this embodiment, the self-cooling sealing device is a separate heat pipe adopting phase change heat exchange, the separate heat pipe works at a temperature of up to several hundred and even up to thousand degrees celsius, for the circulating working medium, a single element type pure substance (silver, lithium, sodium and mercury) is usually selected, because the reaction pipe 19 is usually operated at a temperature of 1000-1600 ℃ due to the limitation of the experimental temperature, the highest temperature that the sealing gasket can bear is not more than 800 ℃, so that the metal simple substance sodium is selected as the circulating working medium, when the working starting temperature of the metal sodium is 600 ℃, the outer wall temperature of the reaction pipe 19 reaches 600 ℃, the separate heat pipe starts to work, and then the heat at the first 25 and second 16 positions of the sealing gasket is continuously transferred to the secondary air circulating in each secondary air inlet pipe 20 through the phase change heat exchange, thereby playing the role of heating the secondary air, increasing the use efficiency of the heat, and avoiding the waste of water resources, wherein the shell 6 is made of carbon steel or alloy steel, so as to ensure the accuracy, the authenticity and the safety of the experimental result.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The burette stove for test, its characterized in that includes:
the reaction tube (19), the outer surface of the reaction tube (19) surrounds and is provided with a heating layer (8), the heating layer (8) is sleeved in the shell (6), and a heat preservation layer (7) is filled between the inner surface of the shell (6) and the outer surface of the heating layer (8); the upper end of the reaction tube (19) extends to the outer side of the heat insulation layer (7), the upper end of the reaction tube (19) is connected with a first disc (24), the first disc (24) is matched with a second disc (23) on the upper side of the first disc, and a first sealing gasket (25) is clamped between the first disc (24) and the second disc (23); at least two fastening bolts (18) sequentially penetrate through the second disc (23) and the first disc (24) from top to bottom and then are in threaded connection with the heat insulation layer (7), and a fastening nut (22) positioned above the second disc (23) is matched on each fastening bolt (18) at the upper end of the reaction tube (19); the lower end of the reaction tube (19) extends to the outer side of the heat insulation layer (7), the lower end of the reaction tube (19) is connected with a third disc (28), the third disc (28) is matched with a fourth disc (29) at the lower side of the third disc, and a second sealing gasket (16) is clamped between the third disc (28) and the fourth disc (29); at least two fastening bolts (18) sequentially pass through the fourth disc (29) and the third disc (28) from bottom to top and then are in threaded connection with the heat insulation layer (7), and each fastening bolt (18) at the lower end of the reaction tube (19) is matched with a fastening nut (22) positioned below the fourth disc (29);
a blanking pipe (15), wherein the blanking pipe (15) sequentially passes through the second disc (23), the first sealing gasket (25) and the first disc (24) from top to bottom and then enters the reaction pipe (19);
at least one secondary air inlet pipe (20), wherein each secondary air inlet pipe (20) sequentially passes through the second disc (23), the first sealing gasket (25) and the first disc (24) from top to bottom and then enters the reaction pipe (19);
the sampling tube (11) sequentially passes through the fourth disc (29), the second sealing gasket (16) and the third disc (28) from bottom to top and then enters the reaction tube (19);
the self-cooling sealing device comprises a separated heat pipe consisting of a heat pipe condensation section (26), a first heat pipe evaporation section (27) and a second heat pipe evaporation section (17), wherein the heat pipe condensation section (26) is cylindrical, an annular cavity in the heat pipe condensation section (26) is a working medium circulation channel, an inner thread is arranged on the inner surface of each heat pipe condensation section (26), an outer thread is arranged on the outer surface of each secondary air inlet pipe (20), and the outer surface of each secondary air inlet pipe (20) is in threaded connection with the heat pipe condensation section (26) which surrounds the outer side of the secondary air inlet pipe (20); the first heat pipe evaporation section (27) and the second heat pipe evaporation section (17) are cylindrical, annular cavities in the first heat pipe evaporation section (27) and the second heat pipe evaporation section (17) are working medium circulation channels, the first heat pipe evaporation section (27) is enclosed on the outer side of the first sealing gasket (25), and the second heat pipe evaporation section (17) is enclosed on the outer side of the second sealing gasket (16);
each heat pipe condensation section (26) is respectively communicated with a first heat pipe evaporation section (27) through a heat pipe connecting pipeline (21), and the first heat pipe evaporation section (27) is communicated with a second heat pipe evaporation section (17) through a heat pipe connecting pipeline (21); the heating layer (8) is connected with the temperature control box (9).
2. The burette furnace for testing according to claim 1, further comprising a first air tank (1) and a powder feeder (14), wherein the first air tank (1) is communicated with the powder feeder (14) through a pipeline, and a flowmeter (3) and a first safety valve (4) are arranged on the pipeline where the first air tank (1) is communicated with the powder feeder (14).
3. The burette furnace for experiments according to claim 1, further comprising at least two second air tanks (2), wherein all the second air tanks (2) are respectively communicated with the air mixing tank (5) through pipelines, a flowmeter (3) and a first safety valve (4) are arranged on the pipeline for each second air tank (2) to be communicated with the air mixing tank (5), and each air mixing tank (5) is respectively communicated with each secondary air inlet pipe (20) through a pipeline.
4. The burette furnace for test according to claim 1, wherein the lower end of the sampling tube (11) is communicated with one end of the sampler (10), and the other end of the sampler (10) is sequentially communicated with the filter (12) and the second safety valve (13) through pipelines.
5. The laboratory drop tube oven of claim 1, wherein: the inner surface of each secondary air inlet pipe (20) is provided with a plurality of ribs.
6. The laboratory drop tube oven of claim 5, wherein: a plurality of fins are arranged in a working medium flow channel of the heat pipe condensation section (26).
7. The laboratory drop tube oven of claim 6, wherein: and silk screens (2701) are filled in the first heat pipe evaporation section (27) and the second heat pipe evaporation section (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910179365.8A CN109812579B (en) | 2019-03-07 | 2019-03-07 | Dropper furnace for test and self-cooling sealing device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910179365.8A CN109812579B (en) | 2019-03-07 | 2019-03-07 | Dropper furnace for test and self-cooling sealing device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109812579A CN109812579A (en) | 2019-05-28 |
| CN109812579B true CN109812579B (en) | 2024-02-27 |
Family
ID=66608617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910179365.8A Active CN109812579B (en) | 2019-03-07 | 2019-03-07 | Dropper furnace for test and self-cooling sealing device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109812579B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854506B (en) * | 2020-07-10 | 2021-11-23 | 武汉华喻燃能工程技术有限公司 | Air cooling radial limiting support |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713284A (en) * | 2009-11-30 | 2010-05-26 | 大庆石油学院 | Over-long threaded heat pipe of sucker rod |
| CN105865854A (en) * | 2016-05-27 | 2016-08-17 | 北方民族大学 | Water cooling sampling gun of drop tube furnace |
| CN205843451U (en) * | 2016-04-06 | 2016-12-28 | 中国科学院工程热物理研究所 | A kind of antigravity heat pipe |
| CN109012555A (en) * | 2018-10-15 | 2018-12-18 | 武汉亚华电炉有限公司 | A kind of drop tube furnace |
| CN209762231U (en) * | 2019-03-07 | 2019-12-10 | 安徽工业大学 | Drop tube furnace for test and self-cooling sealing device thereof |
-
2019
- 2019-03-07 CN CN201910179365.8A patent/CN109812579B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713284A (en) * | 2009-11-30 | 2010-05-26 | 大庆石油学院 | Over-long threaded heat pipe of sucker rod |
| CN205843451U (en) * | 2016-04-06 | 2016-12-28 | 中国科学院工程热物理研究所 | A kind of antigravity heat pipe |
| CN105865854A (en) * | 2016-05-27 | 2016-08-17 | 北方民族大学 | Water cooling sampling gun of drop tube furnace |
| CN109012555A (en) * | 2018-10-15 | 2018-12-18 | 武汉亚华电炉有限公司 | A kind of drop tube furnace |
| CN209762231U (en) * | 2019-03-07 | 2019-12-10 | 安徽工业大学 | Drop tube furnace for test and self-cooling sealing device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109812579A (en) | 2019-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5756814B2 (en) | Coal substance decomposition equipment | |
| CN101992203B (en) | Vacuum pyrolysis test device of wasted electronic circuit board | |
| CN205783036U (en) | A kind of power-plant flue gas system heat-exchanger rig | |
| CN205245553U (en) | Industry heat conduction oil circulation utilizes system | |
| US20150083573A1 (en) | Sleeving cylinder-type coal matter pyrolysis device | |
| CN109812579B (en) | Dropper furnace for test and self-cooling sealing device thereof | |
| CN209762231U (en) | Drop tube furnace for test and self-cooling sealing device thereof | |
| CN104164249B (en) | Pyrolysis installation | |
| CN201828176U (en) | Heat pipe and heat pipe air preheater | |
| CN209271039U (en) | A kind of flue gas heat recovery device | |
| CN114432832B (en) | Waste heat driven air trapping CO in steel plant 2 System of (2) and CO 2 Is used in the method of using | |
| CN211291097U (en) | Rock wool production line waste gas waste heat recovery heat transfer device | |
| CN103712495A (en) | Heat exchange device for recycling flue gas waste heat | |
| CN204254885U (en) | heat-conducting oil furnace | |
| CN210332239U (en) | Power plant flue gas emission system and desulphurization unit | |
| CN202482260U (en) | Radial heat exchange pipe for coke dry quenching preheater | |
| CN209910461U (en) | Floating head type heat exchanger | |
| CN102746897B (en) | Full-blast cooled coal gas generator | |
| CN110013764B (en) | Phase-change heat-storage type catalytic oxidation device for ionic liquid | |
| CN111536807A (en) | Waste heat transfer type smoke exhaust pipeline for steel calcination | |
| CN105486133A (en) | Heat pipe flue gas waste heat recycling device and working medium | |
| CN109931795A (en) | The test application method of drop tube furnace | |
| US5226477A (en) | System for recovery and utilization of exhaust heat from a reformer | |
| CN2762039Y (en) | Separated thermotube heat exchanger | |
| CN104848518A (en) | Boiler exhaust heat recovery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |