CN204619909U - The automatic mixing device of a kind of methane gas - Google Patents
The automatic mixing device of a kind of methane gas Download PDFInfo
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- CN204619909U CN204619909U CN201520343280.6U CN201520343280U CN204619909U CN 204619909 U CN204619909 U CN 204619909U CN 201520343280 U CN201520343280 U CN 201520343280U CN 204619909 U CN204619909 U CN 204619909U
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Abstract
The utility model relates to the automatic mixing device of a kind of methane gas, comprise gas mixer, controller, the low concentration gas air inlet on gas mixer, high concentration gas air inlet and mixing device in Gas gas outlet connect low concentration gas admission line, high concentration gas admission line, mixing gas tube respectively; Low-concentration methane gas pipeline is provided with pressure sensor, equilibrated valve and throttling control valve.The gas density signal of gaseous mixture after mixing is delivered to controller by concentration survey meter by the utility model after low concentration gas and high concentration gas count gas mixer respectively by low concentration gas admission line and high concentration gas admission line, controller controls according to the pressure signal adjustment throttling control valve of gas density signal and pressure sensor conveying the flow that low-concentration methane gas enters gas mixer, maintaining mixing methane gas concentration arranging in scope, adjusting equilibrated valve simultaneously and maintaining package unit pressure in prescribed limit.
Description
Technical field
The utility model relates to the automatic mixing device of a kind of methane gas, and concrete providing is a kind of for automatically being mixed in proportion by the methane gas of height two kinds of concentration, obtains the automaton of the gas gaseous mixture of the concentration value needed after mixing.
Background technology
All there are two cover gas drainage system in current most high methane colliery, a set of low concentration drainage system, a set of high concentration drainage system, the general farmland of its middle and high concentration extraction maintains more than 25%, the general concentration of low concentration is many below 8%, even lower, for most of gas utilization project substantially based on gas electricity, affect by current gas power generation technology, substantially less than 8% concentration cannot utilize, if both are mixed completely utilization often affect production by causing more greatly the rear concentration of mixing extremely unstable in gas drainage under suction concentration, pressure, flowed fluctuation.
Summary of the invention
Technical problem to be solved in the utility model is to provide the automatic mixing device of a kind of methane gas, overcome concentration in prior art lower than 8% methane gas cannot to utilize or after the mixing of high-concentration and low-concentration gas, concentration, flowed fluctuation and pressure change greatly the defect causing fluctuation of service.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: the automatic mixing device of a kind of methane gas, comprise gas mixer, controller, described gas mixer be provided with low concentration gas air inlet, high concentration gas air inlet and mixing device in Gas gas outlet, described low concentration gas air inlet connects low concentration gas admission line, described high concentration gas air inlet connects high concentration gas admission line, and described mixing device in Gas gas outlet connects mixing gas tube; Described low-concentration methane gas pipeline is provided with pressure sensor, equilibrated valve and throttling control valve, and described pressure sensor, equilibrated valve and throttling control valve are all connected by data wire with described controller; Described mixing gas tube is provided with concentration survey meter, and described concentration survey meter is connected with controller by data wire.
On the basis of technique scheme, the utility model can also do following improvement.
The automatic mixing device of the utility model a kind of methane gas described above, further, described controller comprises CPU element and A/D converting unit.
The beneficial effects of the utility model are:
The gas density signal of gaseous mixture after mixing is delivered to controller by concentration survey meter by the utility model after low concentration gas and high concentration gas count gas mixer respectively by low concentration gas admission line and high concentration gas admission line, controller controls according to the pressure signal adjustment throttling control valve of gas density signal and pressure sensor conveying the flow that low-concentration methane gas enters gas mixer, maintaining mixing methane gas concentration arranging in scope, adjusting equilibrated valve simultaneously and maintaining package unit pressure in prescribed limit.
The utility model utilizes the automatic mixing method of the automatic mixing device of above-mentioned methane gas, specifically comprises the following steps:
The opening value v0 of the current pressure values p that step (1) detects according to pressure sensor and current throttling control valve, utilizes formula (1) to obtain current low concentration gas flow value q in low-concentration methane gas pipeline,
Q=f (p, v) formula (1);
Step (2) detects and obtains mixed gas density c1, c2 in the unit interval continuously ..., calculate continuous adjacent time point change in concentration Trend value and utilize formula (2) to calculate the adjusting range coefficient k 1 of current throttling control valve,
K1=(c1-c2)/c1 formula (2);
Step (3) utilizes formula (3) calculating low concentration gas to reach the rear monitoring point time difference tk of mixing according to current low concentration gas flow value q and gas mixer sectional area m,
Tk=q/m formula (3);
Step (4), according to the time difference tk of step (3), current throttling control valve opening value v0 and field apparatus regulation coefficient k, utilizes formula (4) to calculate throttling control valve adjustment opening value v1,
V1＝(k1*v0/tk)*k+v0。
The utility model said method is avoid throttling control valve to adjust the delayed fluctuation of concentration caused, trend prediction control strategy is adopted to controller primary control algorithm and program, the opening value of the gas mixture strength value of concentration survey meter feedback and the force value of pressure sensor device feedback and current throttle valve feedback carries out trend according to certain algorithm, according to the gas mixture strength value of predicted value and immediate feedback, the opening value of force value and choke valve feedback does and adjusts in advance, fast reaction makes after gas mixer, mix mash gas concentration and stablizes, fluctuate minimum, ensure to produce and normally carry out and facilitate later use system to use.
Accompanying drawing explanation
Fig. 1 is the automatic mixing device structural representation of a kind of methane gas of the utility model.
In accompanying drawing, the list of parts representated by each label is as follows:
1, controller, 2, gas mixer, 3, throttling control valve, 4, equilibrated valve, 5, mixing gas tube, 6, pressure sensor, 7, low-concentration methane gas pipeline, 8, high concentration gas admission line, 9, mixing gas tube.
Detailed description of the invention
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Figure 1, the automatic mixing device of a kind of methane gas of the utility model, comprise gas mixer 2, controller 1, described gas mixer 2 be provided with low concentration degree gas inlet, high concentration gas air inlet and mixing device in Gas gas outlet, described low concentration gas air inlet connects low concentration gas admission line 7, described high concentration gas air inlet connects high concentration gas admission line 8, and described mixing device in Gas gas outlet connects mixing gas tube 9; Described low-concentration methane gas pipeline 7 is provided with pressure sensor 6, equilibrated valve 4 and throttling control valve 3, and described pressure sensor 6, equilibrated valve 4 and throttling control valve 3 are all connected by data wire with described controller 1; Described mixing gas tube 5 is provided with concentration survey meter 5, and described concentration survey meter 5 is connected with controller 1 by data wire.Described controller 1 comprises CPU element and A/D converting unit.
The gas density signal of gaseous mixture after mixing is delivered to controller by concentration survey meter by the automatic mixing device of a kind of methane gas of the utility model after low concentration gas and high concentration gas count gas mixer respectively by low concentration gas admission line and high concentration gas admission line, controller controls according to the pressure signal adjustment throttling control valve of gas density signal and pressure sensor conveying the flow that low-concentration methane gas enters gas mixer, to maintain mixing methane gas concentration arranging in scope, adjust equilibrated valve simultaneously and maintain package unit pressure in prescribed limit.
The automatic mixing device of the utility model methane gas can be accurate, sensitive methane gas blending control, make concentration stabilize any pre-values in 8% ~ 40% concentration range after the mixing of high-concentration and low-concentration two kinds of methane gas.
Application example: lucky peaceful gas electricity station, Xiangning County uses this cover system, wherein high concentration gas gas concentration is 35%, low-concentration methane gas concentration 4%, after the mixing of this cover system, can automatically adjust melting concn and maintain 18%, low concentration gas pressure 8KPa before mixing, flow 84M after low concentration gas adjustment throttling control valve
3/ MIN, after mixing, flow is 153M
3/ MIN; Adjust as adopted manual method, fluctuation of concentration scope is 13 ~ 21%, fluctuation range is larger, engine runs less stable, adopt look-ahead automatically to adjust, according to certain algorithm, mixed gas density is predicted according to the concentration collected, pressure signal variation tendency, adjust in advance, fluctuation of concentration scope can maintain 16.5 ~ 19% substantially, can ensure that engine stabilizer runs.
The utility model CPU collects the pressure signal in low concentration gas admission line that the mixing after gas concentration signal of concentration survey meter collection and pressure sensor 6 detect, and then the open degree of controlled pressure balanced valve 4 and throttling control valve 3.Specifically: according to detected pressures signal p, current throttling control valve 3 opening value v0, current low concentration gas flow q is found by empirical data form (empirical data form obtains according to the test method of this area routine), the rear concentration signal c1 of mixing is detected continuously again according to the unit interval, c2 Continuous plus adjacent time point change in concentration Trend value is as current throttling control valve 3 adjusting range coefficient k 1, when variation tendency value close to or after reaching preset value, calculate low concentration gas according to current low concentration gas flow value and gas mixer 2 sectional area m and reach the rear monitoring point time difference tk of mixing, this time difference tk is utilized to regulate the speed coefficient calculations valve opening value as throttling control valve 3.
Concrete computational process:
q＝f(p,v)；
k1＝(c1-c2)/c1；
tk＝q/m；
V1=(k1*v0/tk) * k+v0, wherein k is field apparatus regulation coefficient, the current opening value of v0 throttling control valve, and v1 is throttling control valve adjustment opening value.K is field apparatus regulation coefficient according to the debugging of concrete device context, such as, when default mixed gas density is 18%, when fluctuation of concentration scope excessive or too small time adjust k size controlled concentration fluctuate in less scope.
The utility model can adjust the opening value of throttling control valve in advance owing to have employed above-mentioned method, fast reaction makes after gas mixer, mix mash gas concentration and stablizes, and fluctuates minimum, ensures to produce and normally carries out and facilitate later use system to use.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. the automatic mixing device of methane gas, it is characterized in that, comprise gas mixer, controller, described gas mixer is provided with low concentration gas air inlet, high concentration gas air inlet and mixing device in Gas gas outlet, described low concentration gas air inlet connects low concentration gas admission line, described high concentration gas air inlet connects high concentration gas admission line, and described mixing device in Gas gas outlet connects mixing gas tube; Described low-concentration methane gas pipeline is provided with pressure sensor and equilibrated valve and throttling control valve, and described pressure sensor, equilibrated valve and throttling control valve are all connected by data wire with described controller; Described mixing gas tube is provided with concentration survey meter, and described concentration survey meter is connected with controller by data wire.
2. the automatic mixing device of a kind of methane gas according to claim 1, it is characterized in that, described controller comprises CPU element and A/D converting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520343280.6U CN204619909U (en) | 2015-05-25 | 2015-05-25 | The automatic mixing device of a kind of methane gas |
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| CN201520343280.6U CN204619909U (en) | 2015-05-25 | 2015-05-25 | The automatic mixing device of a kind of methane gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906993A (en) * | 2015-05-25 | 2015-09-16 | 北京扬德环境科技股份有限公司 | Gas automatic blending device and blending method |
| CN113175396A (en) * | 2021-06-15 | 2021-07-27 | 大连亿斯德特种智能装备有限公司 | Mixed combustion power generation system utilizing high-concentration gas and low-concentration gas |
-
2015
- 2015-05-25 CN CN201520343280.6U patent/CN204619909U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906993A (en) * | 2015-05-25 | 2015-09-16 | 北京扬德环境科技股份有限公司 | Gas automatic blending device and blending method |
| CN104906993B (en) * | 2015-05-25 | 2017-03-15 | 北京扬德环境科技股份有限公司 | A kind of automatic mixing device of methane gas and mixing method |
| CN113175396A (en) * | 2021-06-15 | 2021-07-27 | 大连亿斯德特种智能装备有限公司 | Mixed combustion power generation system utilizing high-concentration gas and low-concentration gas |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Gas automatic blending device and blending method Effective date of registration: 20170517 Granted publication date: 20150909 Pledgee: Huaxia Bank Beijing branch Wanliu Limited by Share Ltd. Pledgor: BEIJING YONDER ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: 2017990000412 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20180627 Granted publication date: 20150909 Pledgee: Huaxia Bank Beijing branch Wanliu Limited by Share Ltd. Pledgor: BEIJING YONDER ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: 2017990000412 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Gas automatic blending device and blending method Effective date of registration: 20181210 Granted publication date: 20150909 Pledgee: Bank of Beijing Limited by Share Ltd. Tsinghua Yuan branch Pledgor: BEIJING YONDER ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: 2018990001174 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230419 Granted publication date: 20150909 Pledgee: Bank of Beijing Limited by Share Ltd. Tsinghua Yuan branch Pledgor: BEIJING YONDER ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Registration number: 2018990001174 |