CN203965368U - Heat-obtaining test device after coal mine wind-lack gas oxidation - Google Patents
Heat-obtaining test device after coal mine wind-lack gas oxidation Download PDFInfo
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- CN203965368U CN203965368U CN201420316081.1U CN201420316081U CN203965368U CN 203965368 U CN203965368 U CN 203965368U CN 201420316081 U CN201420316081 U CN 201420316081U CN 203965368 U CN203965368 U CN 203965368U
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Abstract
The heat-obtaining that the utility model belongs to after the oxidation of super-low calorific value gas utilizes technical field, relate in particular to the heat-obtaining test device after coal mine wind-lack gas oxidation, comprise drum, water tank, water softening device, it is characterized in that, also comprise mixed wind system, heat-obtaining system, economizer, mixed wind system comprises burner, cold air inlet, and burner successively pipeline connects cold air inlet, heat-obtaining system, economizer, flue outlet; The beneficial effects of the utility model are: 1) device flexibly, can be realized the time heat-obtaining test that intraductal working medium is respectively subcooled water, two-phase flow, superheated vapor, and the heat-obtaining utilization that experimental data is coal mine methane provides scientific basis; 2) hot blast of different temperatures produces high-temperature flue gas mixing cold wind by fuel gas buring and obtains, can its air quantity of flexible and temperature; 3) utilize the temperature rise of thermoelectric pile test single working medium after heat-obtaining system, utilize that in mass dryness fraction instrument testing tube, two-phase working substance is through the heat-obtaining amount of heat-obtaining system, the experimental data recording is accurate.
Description
Technical field
The heat-obtaining that the utility model belongs to after the oxidation of super-low calorific value gas utilizes technical field, relates in particular to the heat-obtaining test device after coal mine wind-lack gas oxidation.
Background technology
Methane in coal mine wind-lack gas is a kind of clean energy resource, is again a kind of greenhouse gases, and its greenhouse effect are CO
221.5 times, but due to methane concentration low (<0.8%), and the reasons such as fluctuation of concentration is large, ventilation is huge, utilize traditional combustion method to be difficult to wherein methane destroying, most coal mine wind-lack gas enters atmosphere, the direct discharge of super low concentration coal-seam gas has caused the serious waste of limited non-renewable resources on the one hand, has also aggravated on the other hand global atmosphere and has polluted and greenhouse effect.In the energy primary structure of China, coal accounts for 62%, approximately 19,000,000,000 cubes of the pure methanes of the annual discharge of ventilating because mining, account for 45% of world's coal mining discharge methane total amount, wherein, the methane of billion cubic meter more than 150 enters in atmosphere by coalmine ventilation, ventilating gas through processing and utilizing only accounts for 1/4th of sum, if the methane in ventilating gas is all used, approximately amount to 2,300 ten thousand tons of standard coal equivalents, can reduce discharging 1.98 hundred million tons of equivalent carbon dioxide.Therefore, administering and utilize coal mine to ventilate mash gas, is the needs that China makes full use of the energy, environment protection the Implement of sustainable development, has far reaching significance.Therefore; country utilizes the improvement of coal mine wind-lack gas one of important topic of planning as " 12 "; process at present coal mine wind-lack gas mainly by hot counter flow oxidation and catalysis counter flow oxidation technology; research through two more than ten years; utilize the accumulation of heat counter flow oxidation technology of ceramic honey comb to realize the zero-emission of methane in coal mine wind-lack gas relatively ripe; and the field sizeization that realizes coal mine wind-lack gas is processed; the treatment technology of coal mine wind-lack gas has turned on the recycling of coal mine wind-lack gas, on heat-obtaining utilizes.The heat-obtaining of the hot flue gas after coal mine methane thermal oxide mainly adopts built-in heat exchanger to carry out heat-obtaining, the maximization heat-obtaining of the different traditional heat exchangers of this built-in heat exchanger, but guarantee the appropriate heat-obtaining under coal mine methane complete oxidation condition: heat-obtaining is too much, coal mine methane incoming flow can not get enough preheatings and affects the oxygenation efficiency of methane, heat-obtaining is very few, waste heat can be along with the bed center that is constantly the increased in accumulation of commutation cycle, when bed central temperature surpasses the patient ultimate temperature of central part filled honeycomb pottery institute, ceramic honey comb there will be distortion, affect the reliability of device, in addition, the small space that this heat interchanger surrounds in ceramic honey comb, and heat-obtaining mainly leans on convection current unlike traditional heat exchangers, therefore, the design of filling built-in heat exchanger utilizes most important to the heat-obtaining of coal mine methane, but there is following problem in the design of current this heat interchanger at present: the placement location of (1) heat interchanger lacks science data foundation, main by experience, heat interchanger is generally placed the relatively-high temperature district of both sides, bed central area, but center arranges great space, heat interchanger should be placed on how high humidity province, these problems all lack corresponding experimental data, (2) temperature drop of the hot blast of certain operating mode after ceramic honey comb built-in heat exchanger is to determine that coal mine methane oxidation bed success completes the key of heat-obtaining, and in the urgent need to related experiment, for science, determining this temperature drop provides foundation, (3) there are in actual applications a lot of problems in the heat interchanger according to Experience Design, heat-obtaining is not accomplished appropriateness, the oxygenation efficiency, system reliability of operation and the heat utilization efficiency that affect methane, the hot flue gas after coal mine methane thermal oxide discharges with higher temperature, has caused the waste of the energy.Therefore a kind of heat-obtaining test reliably, after the coal mine wind-lack gas oxidation of good test effect becomes problem demanding prompt solution with device.
Utility model content
The utility model provides a kind of can realize the heat-obtaining test that the interior flow working medium of pipe is subcooled water single-phase flow, superheated vapor single-phase flow and two phase flow of damp steam, has the heat-obtaining test device after the coal mine wind-lack gas oxidation that practical function is many, burnup is low, testing reliability is high.
For addressing the above problem, the utility model adopts following technical scheme:
Heat-obtaining test device after coal mine wind-lack gas oxidation, comprise drum, water tank, water softening device, it is characterized in that, also comprise mixed wind system, heat-obtaining system, economizer, mixed wind system comprises burner, cold air inlet, and burner successively pipeline connects cold air inlet, heat-obtaining system, economizer, flue outlet; Water softening device is connected with water tank pipeline, and water tank connects the second valve, main small pump, the 3rd valve, the 4th valve, the first tensimeter, drum successively by pipeline; After drum bottom connects main circulation pump, the 6th valve, the 7th valve, the first filtrator, water flowmeter, thermal resistance sensor, the 11 valve, the 14 valve, the 15 valve successively by pipeline, pipeline one tunnel is connected with heat-obtaining system through the second visor, and heat-obtaining system is connected with temperature test thermoelectric pile, the first visor, the 21 valve by pipeline again; Another pipeline is connected with economizer, the 17 valve by the 16 valve, and two pipelines are connected with drum after connecting the tenth valve after joining again; After connecting successively steam flowmeter, the first temperature sensor, the 18 valve by pipeline on connecting line between the 11 valve, the 14 valve, be connected with economizer; On the connecting line of the 11 valve, the 14 valve, be parallel with the 8th valve, reduction valve; On the connecting line of the 21 valve, be parallel with the 20 valve, the second filtrator, mass dryness fraction instrument; The tenth valve front end be connected with the 12 valve; Drum is connected with economizer after also connecting the 13 valve by pipeline; Liquid level gauge, the second tensimeter, safety valve are also installed on drum; On mixed wind system, be also provided with the second temperature sensor; Flue outlet is provided with volume flow scale.
Wherein, on main small pump connecting line, be parallel with the first valve, standby small pump.
Wherein, on main circulation pump, the 6th valve connecting line, be parallel with spare circulating pump, the 5th valve.
The utility model comprises mixed wind system, heat-obtaining system, economizer, connecting tube and test macro, mixed wind system is realized the high-temp waste gas being produced by liquefied gas burning and is mixed to obtain the hot blast of different temperatures, flow with cold wind, the vertical horizontal heat-obtaining system being built in ceramic honey comb packed bed of plunderring of hot blast completes heat-obtaining test, after this, hot air flow is crossed the recycling that economizer completes part heat and is discharged through flue.The pipeline that water circuit system is drawn respectively by heat-obtaining system, economizer and corresponding flow, pressure, temperature and dryness of wet steam test instrumentation form, and can realize flow working medium in pipe is the heat-obtaining test of subcooled water single-phase flow, superheated vapor single-phase flow and two phase flow of damp steam.
The utility model is equivalent to a series of steady-state process by the transient state heat-obtaining process after coal mine methane oxidation, simplified research technique, during working medium is subcooled water in heat taking and exchanging device experiment test, heat-obtaining system pipeline and economizer pipeline are for being connected in parallel, the waste heat of the system that is arranged so that of economizer is fully utilized, can realize fast water in experimental system drum heating, the different water condition while entering heat interchanger for regulating has been created condition.Can the temperature rise of test water after heat-obtaining system by thermoelectric pile is set at heat-obtaining system heat exchanger inlet/outlet, and then can test the heat-obtaining power of heat interchanger, by the thermopair of arranging, can test out the temperature variation of hot blast after heat-obtaining system in bed.
During experiment test when working medium is superheated vapor in heat-obtaining system heat exchanger, the pipeline of heat-obtaining system and the pipeline of economizer are for being connected in series, superheated vapor is drawn from drum top duct, for the heat radiation making up due to pipeline in flow process causes vapor pressure, the reduction of temperature, the steam of drawing first enters heat-obtaining test macro after economizer is further heated, intraductal working medium while having guaranteed to enter heat-obtaining system is superheated vapor, the temperature rise of superheated vapor after heat-obtaining system can be tested by thermoelectric pile, and then can determine heat-obtaining power when intraductal working medium is superheated vapor, by the thermopair of arranging in bed, can test out the temperature variation of hot blast after heat-obtaining system.
During working medium is two-phase flow in heat-obtaining system heat exchanger experiment test, need to first utilize pipeline that heat-obtaining system and economizer are connected in parallel that the water in drum is heated to saturation water and only have 1/3 of drum total amount, and when drum top air pressure is shown as 0.4MP, this is existing saturation water in drum, there is again steam, by pipeline, respectively saturated water and steam is drawn, saturation water is through water circulating pump pressurization, superheated vapor is further heated into superheated vapor through economizer, two-phase flow is by saturation water, to mix acquisition with superheated vapor, in order to prevent that saturation water from cannot mix with superheated vapor after water circulating pump pressurization, before mixing with superheated vapor, first passes through saturation water step-down, mixed two-phase flow mass dryness fraction can be by the flow of saturation water before mixing, the flow of temperature and superheated vapor, temperature inversion and obtaining, mass dryness fraction when this mass dryness fraction is intraductal working medium and enters heat-obtaining system, mass dryness fraction when intraductal working medium flows out heat-obtaining system can be by outlet mass dryness fraction to determine, and then the heat-obtaining power of the heat-exchange system can obtain intraductal working medium and be two-phase flow time.
Measuring system comprises working condition measurement system and hot blast working condition measurement system in pipe, when intraductal working medium is subcooled water and superheated vapor, need to test its mass rate, temperature and the temperature rise after heat-obtaining system while entering heat-obtaining system, working medium mass rate adopts test instrumentation, temperature while entering heat-obtaining system adopts thermal resistance test, through the temperature rise employing thermoelectric pile test of heat-obtaining system; Pipe external hot air operating mode need to be tested hot blast volumetric flow rate, temperature, by looking into the density of getting at this temperature, obtain the mass rate of hot blast, volumetric flow rate adopts pitot tube test pressure differential by volumetric flow rate gauge outfit output volumetric flow rate, and the temperature of hot blast adopts thermocouple assay.
Described intraductal working medium is the experiment test of two-phase flow, and for the superheated vapor of the relatively low pressure that saturation water can well come with economizer after ebullator pressurization is mixed, saturation water will first pass through reduction valve step-down before mixing with superheated vapor.
The temperature rise of described intraductal working medium after by heat-obtaining system adopts thermoelectric pile to measure, to reduce measuring error
During the mensuration of described pipe external hot air operating mode, the test position of its volumetric flow rate is placed in flue outlet place, by the relatively large wind speed of flue section, reduces measuring error.
Advantage of the present utility model is: 1) device flexibly, can be realized the time heat-obtaining test that intraductal working medium is respectively subcooled water, two-phase flow, superheated vapor, and the heat-obtaining utilization that experimental data is coal mine methane provides scientific basis; 2) hot blast of different temperatures produces high-temperature flue gas mixing cold wind by fuel gas buring and obtains, can its air quantity of flexible and temperature; 3) utilize the temperature rise of thermoelectric pile test single working medium after heat-obtaining system, utilize that in mass dryness fraction instrument testing tube, two-phase working substance is through the heat-obtaining amount of heat-obtaining system, the experimental data recording is accurate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure, 1, water softening device, 2, water tank, 3, the first valve, 4, standby small pump, 5, the second valve, 6, main small pump, 7, the 3rd valve, 8, the 4th valve, 9, the first tensimeter, 10, spare circulating pump, 11, main circulation pump, 12, the 5th valve, 13, the 6th valve, 14, the 7th valve, 15, the 8th valve, 16, the first filtrator, 17, water flowmeter, 18, thermal resistance sensor, 19, drum, 20, liquid level gauge, 21, the second tensimeter, 22, safety valve, 23, the tenth valve, 24, the 11 valve, 25, the first temperature sensor, 26, the 12 valve, 27, the 13 valve, 28, steam flowmeter, 29, the 14 valve, 30, reduction valve, 31, the 15 valve, 32, the 16 valve, 33, the 17 valve, 34, the 18 valve, 35, the 19 valve, 36, mass dryness fraction instrument, 37, the second filtrator, 38, temperature test thermoelectric pile, 39, the first visor, 40, the second visor, 41, the 20 valve, 42, the 21 valve, 43, cold air inlet, 44, burner, 45, the second temperature sensor, 46, heat-obtaining system, 47, economizer, 48, volume flow scale, 49, flue outlet.
Embodiment
As shown in Figure 1, heat-obtaining test device after coal mine wind-lack gas oxidation, comprise drum 19, water tank 2, water softening device 1, mixed wind system, heat-obtaining system 46, economizer 47, mixed wind system comprises burner 44, cold air inlet 43, and burner 44 successively pipeline connects cold air inlet 43, heat-obtaining system 46, economizer 47, flue outlet 49; Water softening device 1 is connected with water tank 2 pipelines, and water tank 2 connects the second valve 5, main small pump 6, the 3rd valve 7, the 4th valve 8, the first tensimeter 9, drum 19 successively by pipeline; Drum 19 bottoms connect successively main circulation pump 11, the 6th valve 13, the 7th valve 14, the first filtrator 16, water flowmeter 17, thermal resistance sensor the 18, the 11 valve the 24, the 14 valve rear pipeline of the 29, the 15 valve 31 one tunnel by pipeline and are connected with heat-obtaining system 46 through the second visor 40, and heat-obtaining system 46 is connected with temperature test thermoelectric pile 38, the first visor the 39, the 21 valve 42 by pipeline again; Another pipeline is connected with economizer the 47, the 17 valve 33 by the 16 valve 32, and two pipelines are connected with drum 19 after connecting the tenth valve 23 after joining again; After connecting successively steam flowmeter 28, the first temperature sensor the 25, the 18 valve 34 by pipeline on pipeline between the 11 valve the 24, the 14 valve 29, be connected with economizer 47; On the connecting line of the 11 valve 24, the 14 valve 29, be parallel with the 8th valve 15, reduction valve 30; On the connecting line of the 21 valve 42, be parallel with the 20 valve 41, the second filtrator 37, mass dryness fraction instrument 36; The tenth valve 23 front ends be connected with the 12 valve 26; Drum 19 is connected with economizer 47 after also connecting the 13 valve 27 by pipeline; Liquid level gauge 20, the second tensimeter 21, safety valve 22 are also installed on drum 19; On mixed wind system, be also provided with the second temperature sensor 45; Flue outlet 49 is provided with volume flow scale 48.
On main small pump 6 connecting lines, be parallel with the first valve 3, standby small pump 4.
On main circulation pump 11, the 6th valve 13 connecting lines, be parallel with spare circulating pump 10, the 5th valve 12.
Its course of work is:
Heat-obtaining test device after coal mine wind-lack gas oxidation, comprise mixed wind system, heat-obtaining system 46, economizer 47, water circuit system and various test instrumentation form, mixed wind system is produced the hot blast that produces uniform temperature high-temperature flue gas mixes with the cold wind entering from cold air inlet 43 by burner 44 burning liquefied gas, for simulating the high-temperature flue gas producing after coal mine methane burning, the temperature of hot blast is by the second temperature sensor 45 tests, hot air flow is by 48 tests of gas volume flow scale, the hot blast of uniform temperature and the flow economizer 47 of flowing through again after heat-obtaining system 46 test, through flue outlet 49, discharge.
Water circuit system can be realized the heat-obtaining test that intraductal working medium while entering heat-obtaining system 46 is respectively subcooled water, superheated vapor, two phase flow of damp steam.
Heat-obtaining test when the intraductal working medium that enters heat-obtaining system 46 is subcooled water, detailed process: first drum 19 is carried out to moisturizing, to be water enter water tank 2 after water softening device 1 is processed stores, the second valve 5, the 3rd valve 7, the 4th valve 8 are opened, through main small pump 6, the first tensimeter 9, by connecting tube, enter drum 19, observe the liquid level gauge 20 on drum 19, until drum 19, fill with after water, close water pipe valve and main small pump 6, after drum 19 moisturizings complete, open main circulation pump 11 and corresponding the 6th valve 13, the 7th valve 14, water by drum 19 bottoms after major cycle water pump 11 pressurization, flow through pipeline successively by the 6th valve 13, the 7th valve 14, the first filtrator 16, water flowmeter 17, thermal resistance sensor 18, the 11 valve 24, the 14 valve 29, after the 15 valve 31, be divided into two-way: a road enters heat-obtaining system 46 after piping is flowed through second visor 40 at heat exchanger entrance place, completing heat-obtaining test flows out by piping, through temperature test thermoelectric pile 38, the first visor 39, the 21 valve 42, another road, through 32 minutes inflow economizer the 47, the 17 valves 33 of the 16 valve, passes back into drum 19 through the tenth valve 23 after two path water converges.When the heat-obtaining that the intraductal working medium that enters heat-obtaining system 46 was subcooled water is tested, the pipeline of flowing through of subcooled water is that heat-obtaining system 46 is in parallel with economizer 47.
Heat-obtaining test when the intraductal working medium that enters heat-obtaining system is superheated vapor, concrete mistake is called: first drum 19 is carried out to moisturizing, to be water enter water tank 2 after softening plant 1 is processed stores, the second valve 5, the 3rd valve 7, the 4th valve 8 are opened, through main small pump 6, by connecting tube, enter drum 19, by observing the liquid level gauge 20 of drum 19, until the interior water level of drum 19, be 2/3 o'clock of drum 19 total volumies, close water pipe and main small pump 6, then open the pipe system while entering the heat-obtaining test that the intraductal working medium of heat-obtaining system 46 is subcooled water, water in drum 19 is heated, until by the first visor 39, the working medium that the second visor 40 is observed in pipe is all steam, and when second tensimeter 21 at drum 19 tops is shown as 0.4Mp, close subcooled water heating pipe line, open the 13 valve 27, after steam just enters economizer 47 and is further heated along pipeline, through piping, flow out economizer 47, through the 19 valve 35, the second visor 40 enters heat-obtaining system 46, after after temperature test thermoelectric pile 38 test temperature rises, first visor 39 in the exit of process heat interchanger, the 21 valve 42, the 12 valve 26 flows out, heat radiation due to pipeline, superheated vapor after 46 tests of heat-obtaining system can not be back to drum 19, can only pass through the 12 valve 26 emptying.Therefore, in heat-obtaining test process when the intraductal working medium that enters heat-obtaining system 46 is superheated vapor, the flow line of superheated vapor be economizer 47 with heat-obtaining system 46 for connecting, the existence of economizer 47 has made up the heat radiation of superheated vapor through pipeline, and the pipe build-in test working medium while guaranteeing to enter heat-obtaining system 46 is superheated vapor.
Heat-obtaining test when the intraductal working medium that enters heat-obtaining system 46 is two phase flow of damp steam, detailed process: water circuit system during heat-obtaining test while first adopting the intraductal working medium of heat-obtaining system 46 to be subcooled water, by drum 19 moisturizings to 2/3 of total amount, close water pipe, and the pipe system while adopting economizer 47 in parallel with heat-obtaining system 46 is heated to the interior water level of drum 19 by the water in drum 19 and only has 1/3 of total amount, close original water circuit system, the test process that the working medium that enters heat-obtaining system 46 is two-phase flow, the acquisition of two-phase flow is by saturation water, to mix acquisition with superheated vapor, therefore need to get through two water routes, one tunnel is the flow channel of superheated vapor, another road is the mobile passage of saturation water, the flow channel of superheated vapor is, superheated vapor enters economizer 47 by the 13 valve 27 outflows at drum 19 tops through piping, the 18 valve 34 of flowing through after heating, the first temperature sensor 25, steam flowmeter 28, after the 14 valve 29, mix with the saturation water on another road, the flow channel of saturation water is, saturation water is drawn and is entered main circulation pump 11 pressurizations from the pipeline of drum 19 bottoms, through the 6th valve 13, the 7th valve 14, the first filtrator 16, water flowmeter 17, thermal resistance sensor 18, the 8th valve 15, through reduction valve 30 and the superheated vapor of separately coming, be mixed into two phase flow of damp steam, mixed two-phase flow is through the 15 valve 31, the 16 valve 32, the second visor 40 enters heat-obtaining system 46, through after heat-obtaining test through temperature test thermoelectric pile 38, the first visor 39, the 20 valve 41, the second filtrator 37, two-phase flow mass dryness fraction instrument 36, the 12 valve 26 flows out emptying, because the two-phase flow after test cannot enter drum 19 after entering pipeline cooling, can only emptying.
Claims (3)
1. the heat-obtaining test device after coal mine wind-lack gas oxidation, comprise drum, water tank, water softening device, it is characterized in that, also comprise mixed wind system, heat-obtaining system, economizer, mixed wind system comprises burner, cold air inlet, and burner successively pipeline connects cold air inlet, heat-obtaining system, economizer, flue outlet; Water softening device is connected with water tank pipeline, and water tank connects the second valve, main small pump, the 3rd valve, the 4th valve, the first tensimeter, drum successively by pipeline; After drum bottom connects main circulation pump, the 6th valve, the 7th valve, the first filtrator, water flowmeter, thermal resistance sensor, the 11 valve, the 14 valve, the 15 valve successively by pipeline, pipeline one tunnel is connected with heat-obtaining system through the second visor, and heat-obtaining system is connected with temperature test thermoelectric pile, the first visor, the 21 valve by pipeline again; Another pipeline is connected with economizer, the 17 valve by the 16 valve, and two pipelines are connected with drum after connecting the tenth valve after joining again; After connecting successively steam flowmeter, the first temperature sensor, the 18 valve by pipeline on connecting line between the 11 valve, the 14 valve, be connected with economizer; On the connecting line of the 11 valve, the 14 valve, be parallel with the 8th valve, reduction valve; On the connecting line of the 21 valve, be parallel with the 20 valve, the second filtrator, mass dryness fraction instrument; The tenth valve front end be connected with the 12 valve; Drum is connected with economizer after also connecting the 13 valve by pipeline; Liquid level gauge, the second tensimeter, safety valve are also installed on drum; On mixed wind system, be also provided with the second temperature sensor; Flue outlet is provided with volume flow scale.
2. the heat-obtaining test device after coal mine wind-lack gas oxidation according to claim 1, is characterized in that, is parallel with the first valve, standby small pump on main small pump connecting line.
3. the heat-obtaining test device after coal mine wind-lack gas oxidation according to claim 1 and 2, is characterized in that, is parallel with spare circulating pump, the 5th valve on main circulation pump, the 6th valve connecting line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420316081.1U CN203965368U (en) | 2014-06-13 | 2014-06-13 | Heat-obtaining test device after coal mine wind-lack gas oxidation |
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| CN201420316081.1U CN203965368U (en) | 2014-06-13 | 2014-06-13 | Heat-obtaining test device after coal mine wind-lack gas oxidation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848674A (en) * | 2015-05-18 | 2015-08-19 | 上海褐美能源科技有限公司 | Coal mine low concentration gas oxidation high temperature hot air and coal slime preparing and drying technology |
| CN105588123A (en) * | 2016-03-14 | 2016-05-18 | 杭州锅炉集团股份有限公司 | Waste heat boiler of preposition ultra-low concentration methane gas oxidation device |
-
2014
- 2014-06-13 CN CN201420316081.1U patent/CN203965368U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848674A (en) * | 2015-05-18 | 2015-08-19 | 上海褐美能源科技有限公司 | Coal mine low concentration gas oxidation high temperature hot air and coal slime preparing and drying technology |
| CN105588123A (en) * | 2016-03-14 | 2016-05-18 | 杭州锅炉集团股份有限公司 | Waste heat boiler of preposition ultra-low concentration methane gas oxidation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20160613 |
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| CF01 | Termination of patent right due to non-payment of annual fee |