CN111878155B - Coal mine low-concentration gas power generation device - Google Patents
Coal mine low-concentration gas power generation device Download PDFInfo
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- CN111878155B CN111878155B CN202010761709.9A CN202010761709A CN111878155B CN 111878155 B CN111878155 B CN 111878155B CN 202010761709 A CN202010761709 A CN 202010761709A CN 111878155 B CN111878155 B CN 111878155B
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- 238000010248 power generation Methods 0.000 title claims abstract description 35
- 239000003245 coal Substances 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 146
- 238000002485 combustion reaction Methods 0.000 claims abstract description 113
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002341 toxic gas Substances 0.000 claims abstract description 14
- 238000004064 recycling Methods 0.000 claims abstract description 9
- 239000002912 waste gas Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000005086 pumping Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides a coal mine low-concentration gas power generation device, which comprises: the device comprises a component group and a control group, wherein the component group comprises at least two drill holes, a drainage branch pipe, a drainage main pipe, an electric control throttle valve, an air valve, a water ring vacuum pump, a conveying pipeline, a first combustion chamber, a generator, an exhaust gas pipe, an exhaust gas valve and a recycling device; the control group comprises a sensing part, a valve group part and a control part, and the control part receives a real-time electric signal generated by the sensing part; a comparison information group is arranged in the control part, the control part compares the information in the real-time electric signal with the information of the comparison information group to generate a first response level control program and a second response level control program, and the control part controls the valve group part to work according to the response level control programs; the invention solves the problems that co and other toxic gases generated in the gas combustion power generation process cannot be treated and a gas generator cannot stably supply power.
Description
Technical Field
The invention relates to the technical field of power generation devices, in particular to a coal mine low-concentration gas power generation device.
Background
Coal bed gas is called coal mine gas in a coal mine, according to a new resource evaluation result, the resource amount of onshore coal bed gas in China is 36.8 billion cubic meters, which is equivalent to the resource amount of onshore conventional natural gas (38 billion cubic meters), and is inferior to Russia and Canada, when the main component of the coal bed gas is methane, the methane is exploded when the concentration of the methane in the air reaches 5% -16%, which is the root of coal mine gas explosion accidents, the coal bed gas is not utilized and is directly discharged into the atmosphere, the greenhouse effect of the coal bed gas is about 21 times of that of carbon dioxide, coal mine gas power generation can effectively solve the coal mine gas accidents, improve the coal mine safety production conditions, be beneficial to increasing clean energy supply and reducing the discharge of greenhouse gas, and achieve the multiple targets of protecting life, resources and environment, but the existing gas power generation device at present, co and other toxic gases are generated in the process of gas combustion power generation, and the co toxic gases discharged into the air can pollute the environment and possibly cause co poisoning of people; on the other hand, when the gas and the air are mixed and combusted, the ratio of the gas to the air is not fixed, so that the gas generator cannot stably supply power; therefore, the invention provides a coal mine low-concentration gas power generation device, which at least partially solves the problem.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description section. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to overcome the problems in the prior art, the invention provides a coal mine low-concentration gas power generation device which comprises a component group and a control group, wherein the component group comprises at least two drill holes, a drainage branch pipe, a drainage main pipe, an electric control throttle valve, an air valve, a water ring vacuum pump, a conveying pipeline, a first combustion chamber, a power generator, an exhaust gas pipe, an exhaust gas valve and a recycling device;
the drill hole is connected with the drainage branch pipe, the upper end of the drainage branch pipe is connected with the drainage main pipe, the drainage branch pipe is used for conveying gas in the drill hole into the drainage main pipe, the air valve is arranged on the drainage main pipe, and air enters the drainage main pipe through the air valve and forms mixed gas with gas in the pipe; the electronic control throttle valve is arranged on the drainage main pipe and is arranged in front of the air valve; the output end of the pumping main pipe is connected with the water ring vacuum pump, the water ring vacuum pump compresses and pressurizes mixed gas, the output end of the water ring vacuum pump is connected with the conveying pipeline, the pressurized mixed gas enters the conveying pipeline, the output end of the conveying pipeline is connected with a first combustion chamber, the right end of the first combustion chamber is connected with the generator, the mixed gas is combusted in the first combustion chamber to convert heat energy into mechanical energy so as to drive the generator to generate electricity, the lower end of the combustion chamber is provided with the waste gas pipe, the waste gas pipe is provided with the waste gas valve, toxic gas formed after the mixed gas is combusted enters the waste gas pipe through the waste gas valve, and then enters the waste gas recycling device through the waste gas pipe;
the control group comprises a sensing part, a valve group part and a control part, and the control part receives a real-time electric signal generated by the sensing part; a comparison information group is arranged in the control part, the control part compares the information in the real-time electric signal with the information of the comparison information group to generate a first response level control program and a second response level control program, and the control part controls the valve group part to work according to the response level control programs; wherein when the control section simultaneously generates the first response level control program and the second response level control program, the control section executes the first response level control program; the control part receives the real-time electric signal again to generate a new first response level control program and/or a second response level control program every time the control part executes the response level control program;
the sensing part comprises a concentration sensor, a temperature sensor, a flow sensor, a pressure sensor and a rotating speed sensor;
the concentration sensor is arranged on the drainage branch pipe and is used for detecting the concentration Q1 of the gas entering the drainage branch pipe;
the temperature sensor is arranged in the first combustion chamber and is used for detecting the temperature T1 in the first combustion chamber;
the pressure sensor is arranged in the first combustion chamber and is used for detecting the pressure P1 in the first combustion chamber;
the flow sensor is arranged on the drainage main pipe, and at least one gas flow sensor is arranged on the drainage main pipe to detect the flow V1 of gas entering the drainage main pipe; the main pumping and discharging pipe is provided with at least one air flow sensor to detect the flow V2 of air entering the main pumping and discharging pipe;
the rotating speed sensor is arranged in the generator and used for detecting the real-time rotating speed N1 of the generator;
the valve group part comprises the electrically controlled throttle valve, the air valve and the exhaust gas valve; the electric control throttle valve and the air valve are in a normally open state, and the waste gas valve is in a normally closed state;
the information stored in the control unit for the comparison information group includes: presetting the concentration Q0 of gas, presetting the temperature T0 in the first combustion chamber, presetting the pressure P0 in the first combustion chamber and presetting the flow V01 of the gas in the drainage main pipe; presetting the flow V02 of air in the pumping main pipe and the preset generator speed N0;
the first response level control program includes:
when the real-time rotating speed N1 of the generator is greater than the preset generator rotating speed N0, and the pressure P1 in the first combustion chamber is greater than the pressure P0 in the preset first combustion chamber, the control part controls the waste gas valve to be opened;
when the real-time rotating speed N1 of the generator is greater than the preset rotating speed N0 of the generator, the pressure P1 in the first combustion chamber is not greater than the preset pressure P0 in the first combustion chamber, and the temperature T1 in the first combustion chamber is less than the preset temperature T0 in the first combustion chamber, the control part controls the electric control throttle valve to close; after the control part controls the electric control throttle valve to close for a working period, if the real-time rotating speed N1 of the generator is still greater than the preset rotating speed N0 of the generator, the control part controls the electric control throttle valve to open; controlling the air valve to close;
when the real-time rotating speed N1 of the generator is less than the preset generator rotating speed N0, the control part controls the waste gas valve to be closed, after the control part controls the air valve to be closed for a working cycle CYC, if the real-time rotating speed N1 of the generator is still less than the preset generator rotating speed N0, the control part controls the electric control throttle valve and the air valve to increase the opening degree, so that the flow of the gas entering the exhaust main pipe is increased; the flow sensor records the gas flow and the air flow at the moment until the real-time rotating speed N1 of the generator is equal to the preset rotating speed N0 of the generator; the control part sets the gas flow and the air flow at the moment to be a preset gas flow V01 in the drainage main pipe and a preset air flow V02 in the drainage main pipe;
the second response level control program includes:
under the condition that the real-time rotating speed N1 of the generator is equal to the preset generator rotating speed N0,
if the flow rate V1 of the gas entering the drainage main pipe is not equal to the flow rate V01 of the gas in the preset drainage main pipe, the control part adjusts the electric control throttle valve so that the flow rate V1 of the gas in the drainage main pipe is equal to the flow rate V01 of the gas in the preset drainage main pipe;
if the flow rate V2 of the air entering the exhaust main pipe is not equal to the flow rate V02 of the air in the preset exhaust main pipe, the control part adjusts the air valve so that the flow rate V2 of the air in the exhaust main pipe is equal to the flow rate V02 of the air in the preset exhaust main pipe;
if the pressure P1 in the first combustion chamber is greater than the preset pressure P0 in the first combustion chamber, the control part controls the waste gas valve to open; if the pressure P1 in the first combustion chamber is less than or equal to the preset pressure P0 in the first combustion chamber, the control part controls the waste gas valve to close.
Further, the electrically-controlled throttle valve and the air valve are provided with at least five gears, including an 1/4 opening gear, a half-opening gear, a 4/5 opening gear, a full-opening gear and a closing gear; the electric control throttle valve and the air valve are in normally open states when in a half-open gear.
Further, when the control portion controls the electronically controlled throttle valve to increase the opening degree, the control portion adjusts the electronically controlled throttle valve and the air valve from a half open range to 4/5 open range; the electronic control throttle valve and the air valve continue for Ts time in an 4/5 open gear state, and after the Ts time, if the real-time rotating speed N1 of the generator is still smaller than the preset rotating speed N0 of the generator, the control part adjusts the electronic control throttle valve and the air valve from 4/5 open gear to full open gear; wherein, the calculation formula of the time Ts is as follows:
Further, duty cycle
In the formula, V Body Represents the volume of space available for combustion gases in the first combustion chamber; n is a radical of 0 Representing a preset generator speed; k represents a unit coefficient; Δ represents an intermediate coefficient;
the intermediate coefficient Δ is calculated as: Δ ═ Ti General assembly /Ti Sheet (ii) a Representing the total service life of the gas power generation device; ti Sheet Represents the longest single use time of the gas power generation device.
Further, waste gas recycling apparatus includes the casing, be equipped with the heating pipe on the left side wall of casing, be equipped with the steam pipe on the right side wall of casing, the lower extreme of steam pipe is equipped with the outlet pipe, the inside of casing is equipped with the air inlet plate, the lower surface of air inlet plate is equipped with the outlet duct, the lower extreme of outlet duct is equipped with the second combustion chamber, and toxic gases such as co pass through the outlet duct and get into in the second combustion chamber, be equipped with the electron fire maker on the inner wall of second combustion chamber, the lower extreme of second combustion chamber is equipped with the water storage chamber, the lower extreme in water storage chamber is equipped with the heating chamber.
Further, the combustion chamber comprises at least two groups of air outlet pipes, wherein each air outlet pipe is uniformly arranged on the lower surface of the air inlet plate, and a one-way valve is arranged in each air outlet pipe and used for preventing gas in the second combustion chamber from generating water and flowing back.
Further, the electronic igniter is electrically connected with the generator through a conducting wire.
Further, the upper end of the heating pipe penetrates through the shell to be connected and communicated with the interior of the second combustion chamber, and the lower end of the heating pipe penetrates through the shell to be communicated with the interior of the heating chamber.
Further, an air circulation one-way valve is arranged at the joint of the conveying pipeline and the first combustion chamber and used for preventing gas in the first combustion chamber from flowing back.
Furthermore, a concentration display is arranged on the outer wall of the drainage branch pipe, and the concentration sensor is electrically connected with the concentration display through a lead
Compared with the prior art, the invention has the following advantages: the control group of the coal mine low-concentration gas power generation device comprises a sensing part, a valve group part and a control part, wherein the control part receives a real-time electric signal generated by the sensing part; a comparison information group is arranged in the control part, the control part compares the information in the real-time electric signal with the information of the comparison information group to generate a first response level control program and a second response level control program, and the control part controls the valve group part to work according to the response level control programs; wherein when the control section simultaneously generates the first response level control program and the second response level control program, the control section executes the first response level control program; the control part receives the real-time electric signal again to generate a new first response level control program and/or a second response level control program every time the control part executes the response level control program; the first response level control program and the second response level control program are both working programs for adjusting variables influencing the state of the generator, and the control group repeatedly executes the first response level control program or the second response level control program so as to ensure stable power supply to the gas generator.
Furthermore, the coal mine low-concentration gas power generation device provided by the invention has the advantages that the tail gas recovery device is arranged at the lower end of the first combustion chamber, generated toxic gas such as co is treated by the tail gas recovery device during gas power generation, the emission of the toxic gas such as co is reduced, the environmental pollution is reduced, the second combustion chamber is arranged in the tail gas recovery device, the generated heat is used for heating the water tank by burning the toxic gas such as co in the second combustion chamber, and the water tank can be daily used by people, so that the heat is recycled, and the production cost of enterprises is reduced.
Drawings
In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.
FIG. 1 is a schematic front view of the structure of embodiment 1 of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
fig. 3 is a schematic view of the internal structure of the housing in embodiment 1 of the present invention;
fig. 4 is a schematic perspective view of an intake plate in embodiment 1 of the present invention;
fig. 5 is a schematic view of the overall structure of the tail gas recycling device in embodiment 2 of the present invention;
reference numerals:
1-drilling, 2-pumping branch pipe, 3-pumping main pipe, 31-electric control throttle valve, 4-air valve, 5-water ring vacuum pump, 6-conveying pipeline, 7-first combustion chamber, 8-generator, 9-exhaust pipe, 91-exhaust valve, 10-shell, 11-heating pipe, 12-steam pipe, 13-water outlet pipe, 14-air inlet plate, 15-air outlet pipe, 16-second combustion chamber, 17-electronic igniter, 18-water storage cavity, 19-heating cavity, 20-concentration sensor, 21-concentration display and 22-blower.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail so as not to obscure the embodiments of the invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The following detailed description of preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "transverse", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention but do not require that the present invention must be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the invention provides a coal mine low-concentration gas power generation device, in embodiment 1: referring to fig. 1-4, the present embodiment provides a technical solution: the coal mine low-concentration gas power generation device comprises a component group and a control group, wherein the component group comprises a plurality of drill holes 1, the drill holes 1 are connected with a drainage branch pipe 2, the upper ends of the drainage branch pipes 2 are connected with a drainage main pipe 3, the drainage branch pipe 2 conveys gas in each drill hole 1 into the drainage main pipe 3, the upper end of the drainage main pipe 3 is provided with an air valve 4, the air valve 4 is opened, air enters the drainage main pipe 3 to form mixed gas with the gas, an electronic control throttle valve 31 is arranged on the drainage main pipe 3, and the electronic control throttle valve 31 is arranged in front of the air valve 4; the output of the pumping main pipe 3 is connected with the input end of a water ring vacuum pump 5, the water ring vacuum pump 5 compresses and pressurizes the mixed gas, the output end of the water ring vacuum pump 5 is connected with a conveying pipeline 6, the pressurized mixed gas enters the conveying pipeline 6, the conveying pipeline 6 is connected with a first combustion chamber 7, the mixed gas is combusted in the first combustion chamber 7, the joint of the conveying pipeline 6 and the first combustion chamber 7 is provided with an air circulation one-way valve to prevent the gas in the first combustion chamber 7 from flowing back, the right end of the first combustion chamber 7 is connected with a generator 8, the mixed gas in the first combustion chamber 7 is combusted to convert the heat energy into mechanical energy to drive the generator 8 to generate electricity, the lower end of the combustion chamber 7 is provided with a waste gas pipe 9, the waste gas pipe 9 is provided with a waste gas valve 91, and the toxic gas formed after the combustion of the mixed gas enters a waste gas recycling device through the waste gas valve 91, the waste gas recycling device comprises a shell 10, a heating pipe 11 is arranged on the left side wall of the shell 10, a steam pipe 12 is arranged on the right side wall of the shell 10, a water outlet pipe 13 is arranged at the lower end of the steam pipe 12, an air inlet plate 14 is arranged inside the shell 10, an air outlet pipe 15 is arranged on the lower surface of the air inlet plate 14, a second combustion chamber 16 is arranged at the lower end of the air outlet pipe 15, co and other toxic gases enter the second combustion chamber 16 through the air outlet pipe 15, an electronic igniter 17 is arranged on the inner wall of the second combustion chamber 16, the electronic igniter 17 ignites to burn the toxic gases in the second combustion chamber 16, a water storage chamber 18 is arranged at the lower end of the second combustion chamber 16, a heating chamber 19 is arranged at the lower end of the water storage chamber 18, the burned gas generates heat, and the heat is conveyed to the heating chamber 19 through the heating pipe 11 to heat water in the water storage chamber 18, the heated water storage chamber 18 generates water vapor which is discharged into the air through the steam pipe 12.
Specifically, the 111 pipes 15 of giving vent to anger are equipped with the multiunit, and evenly arrange be in the lower surface of air inlet plate 14 makes gas even when admitting air, every the inside of the outlet duct 15 is equipped with the check valve, avoids the gas in the second combustion chamber 16 to send out the water backward flow.
Specifically, be equipped with concentration sensor 20 on the inner wall of drainage branch pipe 2, be equipped with concentration display 21 on the outer wall of drainage branch pipe 2, concentration sensor 20 with through the wire electricity between the concentration display 21, can observe the gas concentration volume in drilling 1 through concentration display 21 to the air input of control air valve 4.
Specifically, the electric igniter 17 is electrically connected to the generator 8 through a wire.
Specifically, the upper end of the heating pipe 11 passes through the housing 10 and is connected to the inside of the second combustion chamber 16, and the lower end of the heating pipe 11 passes through the housing 10 and is connected to the inside of the heating chamber 19.
The working principle is as follows: in this embodiment, the gas in the drill hole 1 is combusted in the first combustion chamber 7, the exhaust gas generated after combustion enters the second combustion chamber 16 through the exhaust pipe 9, the exhaust gas in the second combustion chamber 16 is combusted through the electronic igniter 17 to become co2 and other non-toxic gases, the hot gas generated by heating enters the heating cavity 19 through the heating pipe 11 to heat the water in the water storage cavity 18, the water in the water storage cavity 18 is heated to generate steam, and the steam is discharged to the outside through the steam pipe 12.
The control group comprises a sensing part, a valve group part and a control part, and the control part receives a real-time electric signal generated by the sensing part; a comparison information group is arranged in the control part, the control part compares the information in the real-time electric signal with the information of the comparison information group to generate a first response level control program and a second response level control program, and the control part controls the valve group part to work according to the response level control programs; wherein when the control section simultaneously generates the first response level control program and the second response level control program, the control section executes the first response level control program; the control part receives the real-time electric signal again to generate a new first response level control program and/or a second response level control program every time the control part executes the response level control program;
the sensing part comprises a concentration sensor, a temperature sensor, a flow sensor, a pressure sensor and a rotating speed sensor;
the concentration sensor is arranged on the drainage branch pipe 2 and is used for detecting the concentration Q1 of the gas entering the drainage branch pipe 2;
a temperature sensor is provided in the first combustion chamber 7 to detect a temperature T1 inside the first combustion chamber 7;
a pressure sensor is provided in the first combustion chamber 7 to detect a pressure P1 inside the first combustion chamber 7;
the flow sensor is arranged on the drainage main pipe 3, and at least one gas flow sensor is arranged on the drainage main pipe 3 to detect the flow V1 of gas entering the drainage main pipe; the main pumping and discharging pipe 3 is provided with at least one air flow sensor to detect the flow V2 of air entering the main pumping and discharging pipe;
the rotating speed sensor is arranged in the generator 8 and used for detecting the real-time rotating speed N1 of the generator; the valve group part comprises the electric control throttle valve 31, an air valve 4 and an exhaust gas valve 91; the electrically controlled throttle valve 31 and the air valve 4 are in a normally open state, and the exhaust gas valve 91 is in a normally closed state; the information stored in the control unit for the comparison information group includes: presetting the concentration Q0 of gas, the temperature T0 in the first combustion chamber, the pressure P0 in the first combustion chamber and the flow V01 of the gas in the drainage main pipe; the air flow V02 in the main exhaust pipe and the generator speed N0 are preset.
The first response level control program includes:
when the real-time rotating speed N1 of the generator is greater than the preset generator rotating speed N0 and the pressure P1 in the first combustion chamber 7 is greater than the preset pressure P0 in the first combustion chamber, the control part controls the waste gas valve 91 to be opened;
when the real-time rotating speed N1 of the generator is greater than the preset rotating speed N0 of the generator, the pressure P1 in the first combustion chamber 7 is not greater than the preset pressure P0 in the first combustion chamber, and the temperature T1 in the first combustion chamber 7 is less than the preset temperature T0 in the first combustion chamber, the control part controls the electric control throttle valve 31 to close; after the control part controls the electric control throttle valve 31 to close a working period, if the real-time rotating speed N1 of the generator is still greater than the preset rotating speed N0 of the generator, the control part controls the electric control throttle valve 31 to open; controlling the air valve 4 to close;
when the real-time rotating speed N1 of the generator is less than the preset generator rotating speed N0, the control part controls the waste gas valve 91 to be closed, and after the control part controls the air valve 91 to be closed for a working cycle CYC, if the real-time rotating speed N1 of the generator is still less than the preset generator rotating speed N0, the control part controls the electric control throttle valve 31 and the air valve 4 to increase the opening degree, so that the air flow entering the main pumping and discharging pipe 3 is increased; the flow sensor records the gas flow and the air flow at the moment until the real-time rotating speed N1 of the generator is equal to the preset rotating speed N0 of the generator; the control unit sets the gas flow rate and the air flow rate at this time to a preset gas flow rate V01 in the main drainage pipe and a preset air flow rate V02 in the main drainage pipe.
The second response level control program includes:
under the condition that the real-time rotating speed N1 of the generator is equal to the preset generator rotating speed N0, if the flow V1 of the gas entering the drainage main pipe 3 is not equal to the flow V01 of the gas in the drainage main pipe 3, the control part adjusts the electric control throttle valve 31 so that the flow V1 of the gas in the drainage main pipe 3 is equal to the flow V01 of the gas in the drainage main pipe;
if the flow V2 of the air entering the main exhaust pipe is not equal to the flow V02 of the air in the preset main exhaust pipe, the control part adjusts the air valve 4, and the flow V2 of the air in the main exhaust pipe 3 is equal to the flow V02 of the air in the preset main exhaust pipe;
if the pressure P1 in the first combustion chamber 7 is greater than the preset pressure P0 in the first combustion chamber 7, the control portion controls the waste gate valve 91 to open; the control portion controls the waste gate valve 91 to close if the pressure P1 in the first combustion chamber 7 is equal to or less than a preset pressure P0 in the first combustion chamber 7.
Specifically, the electrically-controlled throttle valve and the air valve are provided with at least five gears, including 1/4 opening gear, half-opening gear, 4/5 opening gear, full-opening gear and closing gear; the electric control throttle valve and the air valve are in normally open states when in a half-open gear. The gear setting in the invention is as follows: 1/4 open gear, half open gear, 4/5 open gear and full open gear are based on the clear degree of the pipeline, 1/4 open gear shows that the inner diameter length of the pipeline for flowing gas under the obstruction of the valve body is only 1/4 of the full length; the half-open gear means that the length of the inner diameter of the pipeline for flowing gas under the obstruction of the valve body is 1/2 with the full length; 4/5 open stop indicates that the length of the inner diameter of the conduit for the flow of gas under the obstruction of the valve body is only 4/5 full length.
Specifically, when the control portion controls the electronically controlled throttle valve 31 to increase the opening degree, the control portion adjusts the electronically controlled throttle valve 31 and the air valve 4 from the half open range to 4/5 open range; the electronic control throttle valve 31 and the air valve 4 continue for Ts time in the open gear state of 4/5, and after the Ts time, if the real-time rotating speed N1 of the generator is still smaller than the preset rotating speed N0 of the generator, the control part adjusts the electronic control throttle valve 31 and the air valve 4 from 4/5 open gear to full open gear; wherein, the calculation formula of the time Ts is as follows:
in the formula, V01 is the preset flow rate of the gas in the drainage main pipe; v02 is the preset flow rate of air in the pumping main pipe; ti Sheet Represents the longest single use time of the gas power generation device.
In particular, duty cycle
In the formula, V Body A spatial volume representing the first combustion chamber available for combustion gasesAccumulating; n is a radical of 0 Representing a preset generator speed; k represents a unit coefficient; Δ represents an intermediate coefficient;
the intermediate coefficient Δ is calculated as: Δ ═ Ti General assembly /Ti Sheet (ii) a Representing the total service life of the gas power generation device; ti Sheet Represents the longest single use time of the gas power generation device.
Example 2: referring to fig. 5, the difference between this embodiment and embodiment 1 is that a blower 22 is disposed on an outer wall of the housing 10, the blower 22 is connected to the second combustion chamber 16 through an air pipe, and when the blower 22 works, the combustion of the mixture in the second combustion chamber 16 is accelerated, so that the mixture is combusted more sufficiently, and the exhaust gas residue is avoided.
Specifically, the blower 22 and the electronic igniter 17 are connected in series, and the generator 8 simultaneously energizes the blower 22 and the electronic igniter 17, so that the blower 22 and the electronic igniter operate simultaneously to avoid waste gas residue.
The working principle is as follows: in this embodiment, the blower 22 is energized, and the blower 22 delivers air to the second combustion chamber 16 through the air pipe, so that the combustion of the exhaust gas in the second combustion chamber 16 is accelerated, and the combustion of the exhaust gas is more sufficient.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a colliery low concentration gas power generation facility which characterized in that: the device comprises a component group and a control group, wherein the component group comprises at least two drill holes, a drainage branch pipe, a drainage main pipe, an electric control throttle valve, an air valve, a water ring vacuum pump, a conveying pipeline, a first combustion chamber, a generator, an exhaust gas pipe, an exhaust gas valve and a recycling device;
the drill hole is connected with the drainage branch pipe, the upper end of the drainage branch pipe is connected with the drainage main pipe, the drainage branch pipe is used for conveying gas in the drill hole into the drainage main pipe, the air valve is arranged on the drainage main pipe, and air enters the drainage main pipe through the air valve and forms mixed gas with gas in the pipe; the electronic control throttle valve is arranged on the drainage main pipe and is arranged in front of the air valve; the output end of the pumping main pipe is connected with the water ring vacuum pump, the water ring vacuum pump compresses and pressurizes mixed gas, the output end of the water ring vacuum pump is connected with the conveying pipeline, the pressurized mixed gas enters the conveying pipeline, the output end of the conveying pipeline is connected with a first combustion chamber, the right end of the first combustion chamber is connected with the generator, the mixed gas is combusted in the first combustion chamber to convert heat energy into mechanical energy so as to drive the generator to generate electricity, the lower end of the combustion chamber is provided with the waste gas pipe, the waste gas pipe is provided with the waste gas valve, toxic gas formed after the mixed gas is combusted enters the waste gas pipe through the waste gas valve, and then enters the waste gas recycling device through the waste gas pipe;
the control group comprises a sensing part, a valve group part and a control part, and the control part receives a real-time electric signal generated by the sensing part; a comparison information group is arranged in the control part, the control part compares the information in the real-time electric signal with the information of the comparison information group to generate a first response level control program and a second response level control program, and the control part controls the valve group part to work according to the response level control programs; wherein when the control section simultaneously generates the first response level control program and the second response level control program, the control section executes the first response level control program; the control part receives the real-time electric signal again to generate a new first response level control program and/or a second response level control program every time the control part executes the response level control program;
the sensing part comprises a concentration sensor, a temperature sensor, a flow sensor, a pressure sensor and a rotating speed sensor;
the concentration sensor is arranged on the drainage branch pipe and is used for detecting the concentration Q1 of the gas entering the drainage branch pipe;
the temperature sensor is arranged in the first combustion chamber and is used for detecting the temperature T1 in the first combustion chamber;
the pressure sensor is arranged in the first combustion chamber and is used for detecting the pressure P1 in the first combustion chamber;
the flow sensor is arranged on the drainage main pipe, and at least one gas flow sensor is arranged on the drainage main pipe to detect the flow V1 of gas entering the drainage main pipe; the main pumping and discharging pipe is provided with at least one air flow sensor to detect the flow V2 of air entering the main pumping and discharging pipe;
the rotating speed sensor is arranged in the generator and used for detecting the real-time rotating speed N1 of the generator;
the valve group part comprises the electrically controlled throttle valve, the air valve and the exhaust gas valve; the electric control throttle valve and the air valve are in a normally open state, and the waste gas valve is in a normally closed state;
the information stored in the control unit for the comparison information group includes: presetting the concentration Q0 of gas, the temperature T0 in the first combustion chamber, the pressure P0 in the first combustion chamber and the flow V01 of the gas in the drainage main pipe; presetting the flow V02 of air in the pumping main pipe and the preset generator speed N0;
the first response level control program includes:
when the real-time rotating speed N1 of the generator is greater than the preset generator rotating speed N0, and the pressure P1 in the first combustion chamber is greater than the pressure P0 in the preset first combustion chamber, the control part controls the waste gas valve to be opened;
when the real-time rotating speed N1 of the generator is greater than the preset rotating speed N0 of the generator, the pressure P1 in the first combustion chamber is not greater than the preset pressure P0 in the first combustion chamber, and the temperature T1 in the first combustion chamber is less than the preset temperature T0 in the first combustion chamber, the control part controls the electric control throttle valve to close; after the control part controls the electric control throttle valve to close for a working period, if the real-time rotating speed N1 of the generator is still greater than the preset rotating speed N0 of the generator, the control part controls the electric control throttle valve to open; controlling the air valve to close;
when the real-time rotating speed N1 of the generator is less than the preset generator rotating speed N0, the control part controls the waste gas valve to be closed, after the control part controls the air valve to be closed for a working cycle CYC, if the real-time rotating speed N1 of the generator is still less than the preset generator rotating speed N0, the control part controls the electric control throttle valve and the air valve to increase the opening degree, so that the flow of the gas entering the exhaust main pipe is increased; the flow sensor records the gas flow and the air flow at the moment until the real-time rotating speed N1 of the generator is equal to the preset rotating speed N0 of the generator; the control part sets the gas flow and the air flow at the moment to be a preset gas flow V01 in the drainage main pipe and a preset air flow V02 in the drainage main pipe;
the second response level control program includes:
under the condition that the real-time rotating speed N1 of the generator is equal to the preset generator rotating speed N0,
if the flow rate V1 of the gas entering the drainage main pipe is not equal to the flow rate V01 of the gas in the preset drainage main pipe, the control part adjusts the electric control throttle valve so that the flow rate V1 of the gas in the drainage main pipe is equal to the flow rate V01 of the gas in the preset drainage main pipe;
if the flow rate V2 of the air entering the exhaust main pipe is not equal to the flow rate V02 of the air in the preset exhaust main pipe, the control part adjusts the air valve so that the flow rate V2 of the air in the exhaust main pipe is equal to the flow rate V02 of the air in the preset exhaust main pipe;
if the pressure P1 in the first combustion chamber is greater than the preset pressure P0 in the first combustion chamber,
the control portion controls the exhaust gas valve to open; if the pressure P1 in the first combustion chamber is less than or equal to the preset pressure P0 in the first combustion chamber, the control part controls the waste gas valve to close.
2. The coal mine low-concentration gas power generation device according to claim 1, wherein the electrically-controlled throttle valve and the air valve are each provided with at least five gears, including an 1/4 opening gear, a half-opening gear, a 4/5 opening gear, a full-opening gear and a closing gear; the electric control throttle valve and the air valve are in normally open states when in a half-open gear.
3. The coal mine low-concentration gas power generation device according to claim 2, wherein when the control portion controls the electronically controlled throttle valve to increase the degree of opening, the control portion adjusts the electronically controlled throttle valve and the air valve from a half-open position to 4/5 open position; the electronic control throttle valve and the air valve continue for Ts time in an 4/5 open gear state, and after the Ts time, if the real-time rotating speed N1 of the generator is still smaller than the preset rotating speed N0 of the generator, the control part adjusts the electronic control throttle valve and the air valve from 4/5 open gear to full open gear; wherein, the calculation formula of the time Ts is as follows:
4. The coal mine low-concentration gas power generation device according to claim 3, wherein a duty cycle CYC = is set
(ii) a In the formula, V Body Represents the volume of space available for combustion gases in the first combustion chamber; n is a radical of 0 Representing a preset generator speed; k represents a unit coefficient; Δ represents an intermediate coefficient;
the intermediate coefficient Δ is calculated as: Δ = Ti General assembly /Ti Sheet (ii) a Representing the total service life of the gas power generation device; ti Sheet Represents the longest single use time of the gas power generation device.
5. The coal mine low-concentration gas power generation device according to claim 1,
waste gas recovery recycles device includes the casing, be equipped with the heating pipe on the left side wall of casing, be equipped with the steam pipe on the right side wall of casing, the lower extreme of steam pipe is equipped with the outlet pipe, the inside of casing is equipped with the air inlet plate, the lower surface of air inlet plate is equipped with the outlet duct, the lower extreme of outlet duct is equipped with the second combustion chamber, and the toxic gas of co passes through the outlet duct and gets into in the second combustion chamber, be equipped with the electron fire maker on the inner wall of second combustion chamber, the lower extreme of second combustion chamber is equipped with the water storage chamber, the lower extreme in water storage chamber is equipped with the heating chamber.
6. The coal mine low-concentration gas power generation device as claimed in claim 5, comprising at least two sets of gas outlet pipes, wherein each gas outlet pipe is uniformly arranged on the lower surface of the gas inlet plate, and a check valve is arranged inside each gas outlet pipe and used for preventing gas in the second combustion chamber from flowing back due to water.
7. The coal mine low-concentration gas power generation device according to claim 6, wherein the electronic igniter is electrically connected with the generator through a lead.
8. The coal mine low-concentration gas power generation device according to claim 7, wherein an upper end of the heating pipe passes through the housing to be connected to communicate with the interior of the second combustion chamber, and a lower end of the heating pipe passes through the housing to communicate with the interior of the heating chamber.
9. The coal mine low-concentration gas power generation device according to claim 1, wherein an air circulation check valve is arranged at the joint of the conveying pipeline and the first combustion chamber, and the check valve is used for preventing gas in the first combustion chamber from flowing back.
10. The coal mine low-concentration gas power generation device according to claim 1, wherein a concentration display is arranged on the outer wall of the drainage branch pipe, and the concentration sensor is electrically connected with the concentration display through a lead.
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| CN113047940B (en) * | 2021-04-02 | 2022-03-22 | 贵州华气动力有限责任公司 | Pre-combustion chamber using low-concentration gas |
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| CN101906993A (en) * | 2010-08-26 | 2010-12-08 | 周泉清 | Method and device for early warning explosion of gas and other combustible gases |
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