CN203587397U - Low-temperature smoke sampling box - Google Patents
Low-temperature smoke sampling box Download PDFInfo
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- CN203587397U CN203587397U CN201320763848.0U CN201320763848U CN203587397U CN 203587397 U CN203587397 U CN 203587397U CN 201320763848 U CN201320763848 U CN 201320763848U CN 203587397 U CN203587397 U CN 203587397U
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- temperature
- sampling box
- blowback
- sampling
- control system
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- 238000005070 sampling Methods 0.000 title claims abstract description 166
- 239000000779 smoke Substances 0.000 title abstract description 7
- 239000000523 sample Substances 0.000 claims abstract description 53
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 6
- 238000004321 preservation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model provides a low-temperature smoke sampling box comprising an inner sampling box layer (19), an outer sampling box layer (5), a first temperature control system, a sampling box power source, a control device (13), a sampling probe (20), a sampling pipe (15), a blowback system and a second temperature control system, wherein the first temperature control system comprises first heating devices; the first heating devices (6) are uniformly distributed between the inner sampling box layer (19) and the outer sampling box layer (5); a blowback output port of the blowback system is communicated with the sampling probe (20), and the second temperature control system is arranged within a first preset distance of the blowback system; the low-temperature smoke sampling box is of a double-layer temperature preservation control structure, i.e., firstly, the temperature in the sampling box is kept constant by insulating the relation between the inner sampling box layer and the outer sampling box layer by using the first temperature control system, and then, the problem that a blowback electromagnetic valve is out of work when low-temperature gas passes through the blowback electromagnetic valve is solved by heating the space inside the box body again by using the second temperature control system.
Description
Technical field
The utility model belongs to flue gas sampling technical field, is specifically related to a kind of low-temperature flue gas sampling box.
Background technology
Industrial smoke usually contains the objectionable impuritiess such as sulphur, therefore, and need to be to being just discharged in atmosphere after its purified treatment.Therefore, need to carry out Real-Time Monitoring to flue gas.In prior art, conventionally adopt following methods: by flue gas sampler, gather the flue gas in chimney, then sampling apparatus is transferred to the flue gas collecting in smoke gas analysis equipment, by smoke gas analysis equipment, detect harmful substances from flue gases content and whether exceed standard.Wherein, sampling apparatus generally includes sampling probe.Due to sampling probe occasional, there is the situations such as obstruction, therefore, need regularly sampling probe to be carried out to blowback, back-blowing device is: by blowback draft tube, in impact damper, carry gas, gas in impact damper blows in sampling probe by blowback solenoid valve again, thus cleaning sampling probe.
In said process, mainly there is following problem: for low-temperature cold area, gas in impact damper is usually cryogenic gas, therefore, when cryogenic gas is during by blowback solenoid valve, solenoid valve diaphragm easily freezes, thereby causes blowback battery valve malfunctioning, shorten the serviceable life of blowback solenoid valve, shortened the bulk life time of whole flue gas sampler simultaneously.
Utility model content
The defect existing for prior art, the utility model provides a kind of low-temperature flue gas sampling box, especially be applicable to being applied to cold district, guarantee that gas temperature by blowback solenoid valve is higher than 1 ℃, prevent that solenoid valve diaphragm from freezing, thereby extended the serviceable life of blowback solenoid valve, improved the bulk life time of whole flue gas sampler simultaneously.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of low-temperature flue gas sampling box, comprising: sampling box internal layer (19), sampling box skin (5), the first temperature control system, sampling box power supply and control device (13), sampling probe (20), sampling pipe (15), blowback system and the second temperature control system;
Wherein, described the first temperature control system comprises first heater (6), the first temperature sensor and the first temperature controller (7); Described first heater (6) is evenly arranged between described sampling box internal layer (19) and described sampling box skin (5); Described the first temperature sensor is arranged between described sampling box internal layer (19) and described sampling box skin (5), and, the output terminal of described the first temperature sensor is connected to the input end of described the first temperature controller (7), and the output terminal of described the first temperature controller (7) is connected to the input end of described first heater (6);
The blowback delivery outlet of described blowback system is communicated with described sampling probe (20), and described the second temperature control system is arranged in the first predeterminable range of described blowback system;
Described sampling box power supply and control device (13) are connected with described the first temperature controller (7) and described the second temperature control system respectively; And, described sampling probe (20) is communicated with described sampling pipe (15), and the gas outlet of described sampling pipe (15) is positioned at the space outerpace of described low-temperature flue gas sampling box through described sampling box internal layer (19) and described sampling box skin (5).
Preferably, described the first temperature controller (7) is from limit temperature controller.
Preferably, described the first predeterminable range is 10 centimetres-20 centimetres.
Preferably, described blowback system comprises: blowback draft tube (16), reduction valve (17), impact damper (2), blowback escape pipe (14) and blowback solenoid valve (18);
The air intake opening of described blowback draft tube (16) is positioned at the space outerpace of described low-temperature flue gas sampling box, the gas outlet of described blowback draft tube (16) is communicated with the air intake opening of described impact damper (2), and described reduction valve (17) is arranged on the pipeline of described blowback draft tube (16);
The air intake opening of described blowback escape pipe (14) is communicated with the gas outlet of described impact damper (2), the gas outlet of described blowback escape pipe (14) is communicated with described sampling probe (20), and described blowback solenoid valve (18) is arranged on the pipeline of described blowback escape pipe (14);
Wherein, described the second temperature control system is arranged in the second predeterminable range of described impact damper (2).
Preferably, described the second temperature control system comprises: secondary heating mechanism (1), the second temperature sensor (3) and the second temperature controller (4); Described secondary heating mechanism (1) is arranged in the second predeterminable range of described impact damper (2), described the second temperature sensor (3) is also arranged in the second predeterminable range of described impact damper (2), the output terminal of described the second temperature sensor (3) is connected to the input end of described the second temperature controller (4), and the output terminal of described the second temperature controller (4) is connected to the input end of described secondary heating mechanism (1).
Preferably, sampling probe temperature control system and sampling pipe temperature control system are also set in described low-temperature flue gas sampling box; Described sampling probe temperature control system is connected with described sampling box power supply and control device (13) respectively with described sampling pipe temperature control system.
Preferably, described sampling probe temperature control system comprises: the 3rd heating arrangement, three-temperature sensor and the 3rd temperature controller (9); Described the 3rd heating arrangement and described three-temperature sensor are arranged in the 3rd predeterminable range of described sampling probe, the output terminal of described three-temperature sensor is connected with the input end of described the 3rd temperature controller (9), and the output terminal of described the 3rd temperature controller (9) is connected with the input end of described the 3rd heating arrangement.
Preferably, described sampling pipe temperature control system comprises: the 4th heating arrangement, the 4th temperature sensor and the 4th temperature controller (10); Described the 4th heating arrangement and described the 4th temperature sensor are arranged on apart from flue in the 4th predeterminable range of the sample feeding pipe between described sampling probe, the output terminal of described the 4th temperature sensor is connected with the input end of described the 4th temperature controller (10), and the output terminal of described the 4th temperature controller (10) is connected with the input end of described the 4th heating arrangement.
Preferably, described first heater (6) is heating wire.
The low-temperature flue gas sampling box that the utility model provides has the following advantages:
Low-temperature flue gas sampling box adopts double-layer heat insulation control structure, that is: be first that casing is outer and internal layer is interior by the isolated case of the first temperature control system and the contact of box outside temperature, guarantees temperature constant in sampling box; Then, by the second temperature control system, again to space heating in casing, while having solved cryogenic gas through blowback solenoid valve, make the malfunctioning problem of blowback solenoid valve.
Accompanying drawing explanation
The structural representation of the low-temperature flue gas sampling box that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
In conjunction with Fig. 1, the utility model provides a kind of low-temperature flue gas sampling box, comprising: sampling box internal layer 19, sampling box skin 5, the first temperature control system, sampling box power supply and control device 13, sampling probe 20, sampling pipe 15, blowback system and the second temperature control system.Sampling box power supply and control device 1 are connected with the first temperature controller 7 and the second temperature control system respectively; And sampling probe 20 is communicated with sampling pipe 15, the gas outlet of sampling pipe 15 is positioned at the space outerpace of low-temperature flue gas sampling box through sampling box internal layer 19 and sampling box outer 5.Wherein, sampling box skin can be brushed insulating coating, makes it possess anticreep and rainproof function, and the danger of getting an electric shock while avoiding people to contact, has guaranteed personal safety.
Constant by temperature between the first temperature control system control sampling box internal layer 19 and sampling box skin 5.By the second temperature control system, control near the temperature constant of impact damper in blowback system.That is to say, the utility model, adopts double-layered protecting structure, fully guarantees in impact damper that temperature for example, higher than certain limit value: 1 ℃, thus prevent that solenoid valve diaphragm from freezing.
The structure of the low-temperature flue gas sampling box below the utility model being provided describes in detail:
(1) first temperature control system
The first temperature control system comprises first heater 6, the first temperature sensor and the first temperature controller 7; First heater 6 is evenly arranged between sampling box internal layer 19 and sampling box skin 5; The first temperature sensor is arranged between sampling box internal layer 19 and sampling box skin 5, and the output terminal of the first temperature sensor is connected to the input end of the first temperature controller 7, and the output terminal of the first temperature controller 7 is connected to the input end of first heater 6; Wherein, the first temperature controller 7 can adopt 24V from limit temperature controller, by 24V low-voltage, heats, and certainly limits temperature.The first temperature control system is mainly used in controlling the temperature between sampling box internal layer 19 and sampling box skin 5.
(2) second temperature control systems
The blowback delivery outlet of blowback system is communicated with sampling probe 20, and the second temperature control system is arranged in the first predeterminable range of blowback system; Wherein, the length of the first predeterminable range is adjusted according to actual needs flexibly, for example, can be 10 centimetres-20 centimetres.
Blowback system specifically comprises: blowback draft tube 16, reduction valve 17, impact damper 2, blowback escape pipe 14 and blowback solenoid valve 18; Wherein, the air intake opening of blowback draft tube 16 is positioned at the space outerpace of low-temperature flue gas sampling box, and the gas outlet of blowback draft tube 16 is communicated with the air intake opening of impact damper 2, and reduction valve 17 is arranged on the pipeline of blowback draft tube 16; The air intake opening of blowback escape pipe 14 is communicated with the gas outlet of impact damper 2, and the gas outlet of blowback escape pipe 14 is communicated with sampling probe 20, and blowback solenoid valve 18 is arranged on the pipeline of blowback escape pipe 14;
Wherein, the second temperature control system is arranged in the second predeterminable range of impact damper 2.The length of the second predeterminable range is also adjusted according to actual needs flexibly, for example, can be 10 centimetres-20 centimetres.
The second temperature control system specifically comprises: secondary heating mechanism 1, the second temperature sensor 3 and the second temperature controller 4; Secondary heating mechanism 1 is arranged in the second predeterminable range of impact damper 2, the second temperature sensor 3 is also arranged in the second predeterminable range of impact damper 2, the output terminal of the second temperature sensor 3 is connected to the input end of the second temperature controller 4, and the output terminal of the second temperature controller 4 is connected to the input end of secondary heating mechanism 1.
In addition, for further improving the normal work of each element in low-temperature flue gas sampling box, prevent that each element from, because of malfunctioning under chilling temperatures condition, also arranging sampling probe temperature control system and sampling pipe temperature control system in low-temperature flue gas sampling box; Sampling probe temperature control system is connected with sampling box power supply and control device 13 respectively with sampling pipe temperature control system.By sampling probe temperature control system, automatically control near temperature sampling probe, guarantee that sampling probe normally works.By sampling pipe temperature control system, automatically control near the temperature of sampling pipe, and then assurance sampling pipe is normally worked.Below introduce in detail respectively sampling probe temperature control system and sampling pipe temperature control system.
(3) sampling probe temperature control system
Sampling probe temperature control system comprises: the 3rd heating arrangement, three-temperature sensor and the 3rd temperature controller 9; The 3rd heating arrangement and three-temperature sensor are arranged in the 3rd predeterminable range of sampling probe, the output terminal of three-temperature sensor is connected with the input end of the 3rd temperature controller 9, and the output terminal of the 3rd temperature controller 9 is connected with the input end of the 3rd heating arrangement.Wherein, the length of the 3rd predeterminable range is also adjusted according to actual needs flexibly, for example, can be 10 centimetres-20 centimetres.
(4) sampling pipe temperature control system
For flue to the sample feeding pipe between sampling probe, because the flue-gas temperature in flue is higher, and wherein usually carry certain water vapor, therefore,, when flue gas in flue is transferred to sample feeding pipe, in sample feeding pipe, can meets cold and be condensed into water droplet, on the one hand, in water droplet, melt a certain amount of chemical substance and corrode sample feeding pipe, on the other hand, can have the risk of stopping up sample feeding pipe.Therefore, in the utility model, sampling pipe temperature control system is set, prevents that in sample feeding pipe, fume gas condensation is water droplet.Concrete, sampling pipe temperature control system comprises: the 4th heating arrangement, the 4th temperature sensor and the 4th temperature controller 10; The 4th heating arrangement and the 4th temperature sensor are arranged on apart from flue in the 4th predeterminable range of the sample feeding pipe between sampling probe, the output terminal of the 4th temperature sensor is connected with the input end of the 4th temperature controller 10, and the output terminal of the 4th temperature controller 10 is connected with the input end of the 4th heating arrangement.Wherein, the length of the 4th predeterminable range is also adjusted according to actual needs flexibly, for example, can be 10 centimetres-20 centimetres.
The low-temperature flue gas sampling box that the utility model provides, its course of work is:
In sampling box, the operation in 24 hours of each element, between sampling box internal layer 19 and sampling box skin 5, by increasing by the first temperature control system, heats and is incubated sampling box; Near case internal inner ring, also use the second temperature control system to heat, operated by rotary motion, at 40 degree, further improves the temperature inside the box.According to regional disparity, can be by adjusting the temperature settings of the second temperature control system, but the highlyest can not exceed 100 degree.
When needs carry out blowback sampling, open blowback solenoid valve about 3 seconds, in impact damper, gas carries out blowback by blowback solenoid valve to sampling pipe, thereby the particles such as dust in sampling pipe is purged totally to 39 liters of left and right of emission gases in second.Simultaneously, extraneous pressurized air enters impact damper by blowback draft tube, now starting the second temperature control system heats impact damper, 9 liters of pressurized air that impact damper emits are supplemented by extraneous pressurized air, internal gas and ambient atmos mix makes gas temperature in impact damper be greater than 1 degree, has guaranteed to be greater than 1 degree by the gas temperature of blowback solenoid valve, prevents that solenoid valve diaphragm from producing ice formation issues, guarantee the impermeability of blowback solenoid valve, increased the life-span of blowback solenoid valve.Increase the bulk life time of equipment simultaneously, improved the comprehensive effectively operation ratio of equipment set.
In sum, the low-temperature flue gas sampling box that the utility model provides, has the following advantages:
(1) adopting double-layer heat insulation control structure, that is: is first that casing is outer and internal layer is interior by the isolated case of the first temperature control system and the contact of box outside temperature, guarantees temperature constant in sampling box; Then, by the second temperature control system, again to space heating in casing, while having solved cryogenic gas through blowback solenoid valve, make the malfunctioning problem of blowback solenoid valve.
(2) by increasing sampling probe temperature control system and sampling pipe temperature control system, guaranteed that sampling box is at cold district, the temperature inside the box is constant, be not subject to external interference, guaranteed that flue gas sampling equipment normally gathers gaseous sample, increased the running rate of flue gas automatic on-line monitoring equipment, the performance of raising equipment, reduce sampling pipe or the blocked probability of sampling probe, if the design of blowback time is proper, can realize in theory sampling pipe or sampling probe do not stop up, air tight.
(3) this low-temperature flue gas sampling box is simple in structure, easy to make, can be widely used in flue gas CEMS sampling field, is mainly arranged on power plant's chimney or flue, for smoke collecting.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection domain of the present utility model.
Claims (9)
1. a low-temperature flue gas sampling box, it is characterized in that, comprising: sampling box internal layer (19), sampling box skin (5), the first temperature control system, sampling box power supply and control device (13), sampling probe (20), sampling pipe (15), blowback system and the second temperature control system;
Wherein, described the first temperature control system comprises first heater (6), the first temperature sensor and the first temperature controller (7); Described first heater (6) is evenly arranged between described sampling box internal layer (19) and described sampling box skin (5); Described the first temperature sensor is arranged between described sampling box internal layer (19) and described sampling box skin (5), and, the output terminal of described the first temperature sensor is connected to the input end of described the first temperature controller (7), and the output terminal of described the first temperature controller (7) is connected to the input end of described first heater (6);
The blowback delivery outlet of described blowback system is communicated with described sampling probe (20), and described the second temperature control system is arranged in the first predeterminable range of described blowback system;
Described sampling box power supply and control device (13) are connected with described the first temperature controller (7) and described the second temperature control system respectively; And, described sampling probe (20) is communicated with described sampling pipe (15), and the gas outlet of described sampling pipe (15) is positioned at the space outerpace of described low-temperature flue gas sampling box through described sampling box internal layer (19) and described sampling box skin (5).
2. low-temperature flue gas sampling box according to claim 1, is characterized in that, described the first temperature controller (7) is from limit temperature controller.
3. low-temperature flue gas sampling box according to claim 1, is characterized in that, described the first predeterminable range is 10 centimetres-20 centimetres.
4. low-temperature flue gas sampling box according to claim 1, it is characterized in that, described blowback system comprises: blowback draft tube (16), reduction valve (17), impact damper (2), blowback escape pipe (14) and blowback solenoid valve (18);
The air intake opening of described blowback draft tube (16) is positioned at the space outerpace of described low-temperature flue gas sampling box, the gas outlet of described blowback draft tube (16) is communicated with the air intake opening of described impact damper (2), and described reduction valve (17) is arranged on the pipeline of described blowback draft tube (16);
The air intake opening of described blowback escape pipe (14) is communicated with the gas outlet of described impact damper (2), the gas outlet of described blowback escape pipe (14) is communicated with described sampling probe (20), and described blowback solenoid valve (18) is arranged on the pipeline of described blowback escape pipe (14);
Wherein, described the second temperature control system is arranged in the second predeterminable range of described impact damper (2).
5. low-temperature flue gas sampling box according to claim 4, is characterized in that, described the second temperature control system comprises: secondary heating mechanism (1), the second temperature sensor (3) and the second temperature controller (4); Described secondary heating mechanism (1) is arranged in the second predeterminable range of described impact damper (2), described the second temperature sensor (3) is also arranged in the second predeterminable range of described impact damper (2), the output terminal of described the second temperature sensor (3) is connected to the input end of described the second temperature controller (4), and the output terminal of described the second temperature controller (4) is connected to the input end of described secondary heating mechanism (1).
6. low-temperature flue gas sampling box according to claim 1, is characterized in that, sampling probe temperature control system and sampling pipe temperature control system are also set in described low-temperature flue gas sampling box; Described sampling probe temperature control system is connected with described sampling box power supply and control device (13) respectively with described sampling pipe temperature control system.
7. low-temperature flue gas sampling box according to claim 6, is characterized in that, described sampling probe temperature control system comprises: the 3rd heating arrangement, three-temperature sensor and the 3rd temperature controller (9); Described the 3rd heating arrangement and described three-temperature sensor are arranged in the 3rd predeterminable range of described sampling probe, the output terminal of described three-temperature sensor is connected with the input end of described the 3rd temperature controller (9), and the output terminal of described the 3rd temperature controller (9) is connected with the input end of described the 3rd heating arrangement.
8. low-temperature flue gas sampling box according to claim 6, is characterized in that, described sampling pipe temperature control system comprises: the 4th heating arrangement, the 4th temperature sensor and the 4th temperature controller (10); Described the 4th heating arrangement and described the 4th temperature sensor are arranged on apart from flue in the 4th predeterminable range of the sample feeding pipe between described sampling probe, the output terminal of described the 4th temperature sensor is connected with the input end of described the 4th temperature controller (10), and the output terminal of described the 4th temperature controller (10) is connected with the input end of described the 4th heating arrangement.
9. according to the low-temperature flue gas sampling box described in claim 1-8 any one, it is characterized in that, described first heater (6) is heating wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320763848.0U CN203587397U (en) | 2013-11-27 | 2013-11-27 | Low-temperature smoke sampling box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320763848.0U CN203587397U (en) | 2013-11-27 | 2013-11-27 | Low-temperature smoke sampling box |
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| Publication Number | Publication Date |
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| CN203587397U true CN203587397U (en) | 2014-05-07 |
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| CN201320763848.0U Expired - Fee Related CN203587397U (en) | 2013-11-27 | 2013-11-27 | Low-temperature smoke sampling box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210378183A1 (en) * | 2020-06-09 | 2021-12-09 | Korea Research Institute Of Standards And Science | Temperature control system of a rice paddy methane flux collecting device |
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2013
- 2013-11-27 CN CN201320763848.0U patent/CN203587397U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210378183A1 (en) * | 2020-06-09 | 2021-12-09 | Korea Research Institute Of Standards And Science | Temperature control system of a rice paddy methane flux collecting device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100101 Beijing city Chaoyang District Anxiang, No. 11 B block 2 layer Patentee after: CHINA SCIENCE MAPUNIVERSE TCHNDOGY Co.,Ltd. Address before: 100101 Beijing city Chaoyang District Anxiang, No. 11 B block 2 layer Patentee before: CHINA SCIENCES MAPUNIVERSE TECHNOLOGY CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 |