CN219697924U - High-temperature heating vacuum tube - Google Patents
High-temperature heating vacuum tube Download PDFInfo
- Publication number
- CN219697924U CN219697924U CN202321320959.4U CN202321320959U CN219697924U CN 219697924 U CN219697924 U CN 219697924U CN 202321320959 U CN202321320959 U CN 202321320959U CN 219697924 U CN219697924 U CN 219697924U
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- tube
- heating
- gas
- pipe
- inner tube
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 108
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 35
- 229910052753 mercury Inorganic materials 0.000 description 21
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- -1 mercury ions Chemical class 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000405070 Percophidae Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 238000001391 atomic fluorescence spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002482 cold vapour atomic absorption spectrometry Methods 0.000 description 1
- 238000002530 cold vapour atomic fluorescence spectroscopy Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
The utility model discloses a high-temperature heating vacuum tube, and relates to the technical field of heating tubes. The utility model comprises at least one heating pipe unit; the heating pipe unit comprises an inner pipe, an outer pipe and a heating wire; the heating wire is fixed in the inner tube, the two ends of the inner tube are sealed in a flat shape, and the two ends of the heating wire extend out of the flat seals at the two ends of the inner tube; the both ends of outer tube and the week side fixed connection of inner tube form the gas passage between outer tube and the inner tube, and open the week side of outer tube has air inlet and gas outlet, and air inlet and gas outlet are located the both ends of outer tube respectively to make gas flow along the gas passage. According to the utility model, the heating pipe unit is designed, and the heating wire is sealed in the inner pipe, so that the heating wire can be prevented from being oxidized at high temperature, and the service life of the heating wire is greatly prolonged; a gas channel is formed between the outer tube and the inner tube, so that gas flows along the gas channel, and the gas is fully contacted with the inner tube, so that the heating efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of heating pipes, and particularly relates to a high-temperature heating vacuum pipe.
Background
Mercury is one of the health-hazardous pollutants in the atmosphere, and a great deal of research and some results have been carried out on environmental mercury determination methods. Human activity is the primary source of mercury pollution, while coal-fired power plants are the primary source of artificial mercury emissions. The average Hg content of the internal combustion coal worldwide is about 0.13mg/kg, the average Hg content of the Chinese coal is about 0.22mg/kg, the average Hg content of the Chinese coal is much higher than the average Hg content of the world, the discharged Hg content in the combustion process is larger, and the problem of Hg pollution caused by the Hg content is serious.
In the existing mercury detection analysis method, cold atomic absorption spectrometry (CVAAS) and cold atomic fluorescence spectrometry (CVAFS) are generally adopted, and the spectrum absorption method can only detect atomic mercury, and mercury can be divided into three forms in the atmosphere, namely mercury atoms, mercury ions and granular mercury, and the mercury ions and the granular mercury are easy to adsorb and consume in the measurement process, so that the mercury ions need to be converted into mercury atoms. At present, the main mode of converting ionic mercury into atomic mercury is completed through heating, and the flue gas is directly heated through a resistance wire by utilizing the characteristic that mercury ions can be reduced into mercury atoms at high temperature, so that the conversion of the ionic mercury is realized. But the heating mode has low heat utilization rate, uneven gas heating, and the resistance wire is exposed in the air, is easy to oxidize under the high temperature condition, and has shorter service life.
Disclosure of Invention
The utility model aims to provide a high-temperature heating vacuum tube, which is characterized in that a heating tube unit is designed, the heating tube unit comprises an inner tube, an outer tube and a heating wire, the heating wire is fixed in the inner tube, two ends of the outer tube are fixedly connected with the periphery of the inner tube, and a gas channel is formed between the outer tube and the inner tube, so that the problems that in the existing heating mode for mercury-containing flue gas, the heat utilization rate is low, the gas heating is uneven, the resistance wire is exposed to the air, the resistance wire is easy to oxidize under the high-temperature condition, and the service life is short are solved.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model relates to a high-temperature heating vacuum tube, which comprises at least one heating tube unit and a radiating tube; the heating pipe unit comprises an inner pipe, an outer pipe and a heating wire. The heating wire is fixed in the inner tube, the two ends of the inner tube are sealed in a flat shape, and the two ends of the heating wire extend out of the flat seals at the two ends of the inner tube; the two ends of the outer tube are fixedly connected with the peripheral side of the inner tube, a gas channel is formed between the outer tube and the inner tube, a gas inlet and a gas outlet are formed in the peripheral side of the outer tube, and the gas inlet and the gas outlet are respectively positioned at the two ends of the outer tube so that gas flows along the gas channel. The radiating pipe is connected with the air outlet.
As a preferential technical scheme of the utility model, one end of the inner tube is connected with an evacuation tube for evacuating the inner tube, and the air in the inner tube is discharged to form vacuum, so that the high-temperature oxidation of the heating wire can be prevented, and the service life of the heating wire can be greatly prolonged.
As a preferential technical scheme of the utility model, the two ends of the heating wire are fixedly connected with the metal wire lugs, one ends of the metal wire lugs, which are fixed with the heating wire, are pressed in the flat seal, and one ends of the metal wire lugs, which are far away from the heating wire, extend out of the flat seal, so that the processing is convenient
As a preferential technical scheme of the utility model, two heating pipe units are adopted, the two heating pipe units are arranged side by side, and the outer pipes of the two heating pipe units are fixedly connected; a communicating pipe is arranged between the two heating pipe units, and two ends of the communicating pipe are respectively and fixedly connected with the outer pipes of the two heating pipe units so as to communicate gas channels of the two heating pipe units.
As a preferential technical scheme of the utility model, the air inlet and the air outlet are positioned at the same end, and the communicating pipe is arranged at one end far away from the air inlet and the air outlet so as to form a -shaped gas channel between two heating pipe units, thereby improving the flow path of gas in the heating pipe and having high heating efficiency.
As a preferential technical scheme of the utility model, the inner tube, the outer tube, the radiating tube and the communicating tube are all made of dehydroxylated quartz glass.
The utility model has the following beneficial effects:
1. according to the utility model, the heating pipe unit is designed, the heating pipe unit comprises an inner pipe, an outer pipe and a heating wire, the heating wire is fixed in the inner pipe, two ends of the outer pipe are fixedly connected with the periphery of the inner pipe, a gas channel is formed between the outer pipe and the inner pipe, the periphery of the outer pipe is provided with a gas inlet and a gas outlet, the gas inlet and the gas outlet are respectively positioned at two ends of the outer pipe, so that gas flows along the gas channel, the gas is fully contacted with the inner pipe, and the heating efficiency is high.
2. According to the utility model, the heating wire is fixed in the inner tube, the two ends of the inner tube are sealed in a flat shape, the two ends of the heating wire extend out of the flat seals at the two ends of the inner tube, and meanwhile, one end of the inner tube is connected with the evacuation tube for evacuating the inner tube, so that the air in the inner tube is discharged to form vacuum, the heating wire can be prevented from being oxidized at a high temperature, and the service life of the heating wire is greatly prolonged.
Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high temperature heating vacuum tube according to a first embodiment;
fig. 2 is a schematic structural diagram of a high-temperature heating vacuum tube in the second embodiment;
in the drawings, the list of components represented by the various numbers is as follows:
100-heating pipe unit, 1-inner pipe, 101-flat seal, 102-evacuation pipe, 2-outer pipe, 201-air inlet, 202-air outlet, 3-heater strip, 301-metal wiring piece, 4-radiating pipe and 5-communicating pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "open," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like indicate orientation or positional relationships, merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
Example 1
Referring to fig. 1, the present embodiment provides a high-temperature heating vacuum tube, which includes a heating tube unit 100 and a radiating tube 4. The heating tube unit 100 includes an inner tube 1, an outer tube 2, and a heating wire 3. The inner tube 1, the outer tube 2 and the radiating tube 4 are all made of dehydroxylated quartz glass to have sufficient thermal stability. The heating wire 3 is fixed in the inner tube 1, and the two ends of the heating wire 3 are fixedly connected with metal wiring lugs 301. The two ends of the inner tube 1 are pressed into a flat seal 101 similar to a duckbill by firing, so that the inner tube 1 is sealed. The metal wiring piece 301 is fixed with the fixed end of the heating wire 3 in the flat seal 101 in a pressing mode, the heating wire 3 and the metal wiring piece 301 are fixed, and meanwhile one end, far away from the heating wire 3, of the metal wiring piece 301 extends out of the flat seal 101, so that external wiring is facilitated. Wherein, one end of the inner tube 1 is connected with an evacuation tube 102 for evacuating the inner tube 1, and after evacuating the air of the inner tube 1 to form vacuum, the evacuation tube 102 is burned and sealed, thereby preventing the high temperature oxidation of the heating wire 3 and greatly prolonging the service life of the heating wire 3.
The two ends of the outer tube 2 are fixedly connected with the peripheral side of the inner tube 1, so that a gas channel is formed between the outer tube 2 and the inner tube 1, a gas inlet 201 and a gas outlet 202 are formed in the peripheral side of the outer tube 2, and the gas inlet 201 and the gas outlet 202 are respectively positioned at the two ends of the outer tube 2, so that gas flows along the gas channel. Wherein the radiating pipe 4 is connected to the air outlet 202.
When the gas-cooling device works, the heating wire 3 is opened, flue gas to be reduced is introduced from the gas inlet 201, in the process that the flue gas passes through the gas channel, the heat generated by the heating wire 3 in the inner pipe 1 heats ionic mercury in the flue gas, so that the ionic mercury is reduced into atomic mercury, and the reduced flue gas is discharged into the radiating pipe from the gas outlet 202, so that the subsequent processing is facilitated. The high-temperature heating vacuum tube has high heat utilization rate, is convenient for temperature and installation, and greatly prolongs the service life of the heating wire 3.
Example two
Based on the first embodiment, the second embodiment is different in that:
referring to fig. 2, the high-temperature heating vacuum tube adopts two heating tube units 100, the two heating tube units 100 are arranged side by side, and the outer tubes 2 of the two heating tube units 100 are fixedly connected. A communicating pipe 5 is arranged between the two heating pipe units 100, and two ends of the communicating pipe 5 are respectively and fixedly connected with the outer pipes 2 of the two heating pipe units 100 so as to communicate gas channels of the two heating pipe units 100. Wherein, the air inlet 201 and the air outlet 202 are positioned at the same end, and the communicating pipe 5 is arranged at one end far away from the air inlet 201 and the air outlet 202, so as to form a gas channel between the two heating pipe units 100, and promote the flow path of the gas in the heating pipe, thereby reducing mercury ions in the flue gas more fully. Meanwhile, the structure is compact, and the heating efficiency is high.
In addition, in order to further improve the mercury ion reduction effect in the flue gas, more heating pipe units 100 may be used, for example, three heating pipe units are used, and the three heating pipe units are arranged side by side and connected end to end, so that an S-shaped gas channel is formed between the three heating pipe units 100.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. A high-temperature heating vacuum tube, which is characterized by comprising at least one heating tube unit (100) and a radiating tube (4); the heating pipe unit (100) comprises an inner pipe (1), an outer pipe (2) and a heating wire (3);
the heating wire (3) is fixed in the inner tube (1), both ends of the inner tube (1) are provided with flat seals (101), and both ends of the heating wire (3) extend out of the flat seals (101) at both ends of the inner tube (1); the two ends of the outer tube (2) are fixedly connected with the periphery of the inner tube (1), a gas channel is formed between the outer tube (2) and the inner tube (1), a gas inlet (201) and a gas outlet (202) are formed in the periphery of the outer tube (2), and the gas inlet (201) and the gas outlet (202) are respectively positioned at the two ends of the outer tube (2) so that gas flows along the gas channel;
the radiating pipe (4) is connected with the air outlet (202).
2. A high temperature heating vacuum tube according to claim 1, characterized in that one end of the inner tube (1) is connected with an evacuation tube (102) for evacuating the inner tube (1).
3. A high-temperature heating vacuum tube according to claim 2, wherein the two ends of the heating wire (3) are fixedly connected with metal lugs (301), one end of the metal lugs (301) fixed with the heating wire (3) is pressed and fixed in the flat seal (101), and one end of the metal lugs (301) far away from the heating wire (3) extends out of the flat seal (101).
4. A high temperature heating vacuum tube according to any one of claims 1-3, characterized in that two heating tube units (100) are employed, two heating tube units (100) being arranged side by side, the outer tubes (2) of the two heating tube units (100) being fixedly connected; a communicating pipe (5) is arranged between the two heating pipe units (100), and two ends of the communicating pipe (5) are fixedly connected with the outer pipes (2) of the two heating pipe units (100) respectively so as to communicate gas channels of the two heating pipe units (100).
5. A high-temperature heating vacuum tube according to claim 4, wherein the gas inlet (201) and the gas outlet (202) are located at the same end, and the communication tube (5) is provided at an end remote from the gas inlet (201) and the gas outlet (202) to form a "" shaped gas passage between the two heating tube units (100).
6. A high temperature heating vacuum tube according to claim 5, wherein said inner tube (1), outer tube (2), radiating tube (4) and communicating tube (5) are all made of dehydroxylated quartz glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321320959.4U CN219697924U (en) | 2023-05-29 | 2023-05-29 | High-temperature heating vacuum tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321320959.4U CN219697924U (en) | 2023-05-29 | 2023-05-29 | High-temperature heating vacuum tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219697924U true CN219697924U (en) | 2023-09-15 |
Family
ID=87967215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321320959.4U Active CN219697924U (en) | 2023-05-29 | 2023-05-29 | High-temperature heating vacuum tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219697924U (en) |
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2023
- 2023-05-29 CN CN202321320959.4U patent/CN219697924U/en active Active
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