CN109611204B - Biogas generating set shuts down locking system based on gas holder state - Google Patents
Biogas generating set shuts down locking system based on gas holder state Download PDFInfo
- Publication number
- CN109611204B CN109611204B CN201811367383.0A CN201811367383A CN109611204B CN 109611204 B CN109611204 B CN 109611204B CN 201811367383 A CN201811367383 A CN 201811367383A CN 109611204 B CN109611204 B CN 109611204B
- Authority
- CN
- China
- Prior art keywords
- generator set
- control unit
- gas holder
- detection unit
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 230000008054 signal transmission Effects 0.000 claims abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 239000000523 sample Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
-
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/025—Failure diagnosis or prevention; Safety measures; Testing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a shutdown locking control system of a biogas generator set based on a gas holder state. The system comprises: the detection unit is positioned on the mounting bracket on one side of the top of the external frame of the gas holder and is configured to detect the height state of the air bag in the gas holder; a control unit connected with the detection unit and configured to be connected with a generator set and associated devices of the generator set; and a signal transmission unit which is connected with the detection unit and the control unit and is configured to transmit the detection result of the detection unit to the control unit, wherein the control unit is further configured to compare the detection result of the detection unit with a predetermined threshold value and control whether the generator set and the related devices of the generator set stop or not based on the comparison result. The device provided by the invention can realize high-reliability gas holder height monitoring and provides reliable guarantee for 24-hour unattended operation of the generator set.
Description
Technical Field
The invention relates to a shutdown locking control system of a biogas generator set based on a gas holder state, which can provide high-reliability gas holder height monitoring and provide reliable guarantee for realizing 24-hour unattended operation of the generator set.
Background
In the field of biogas power generation, biogas generated by a fermentation tank is generally dehydrated and desulfurized and then conveyed to a low-pressure gas storage cabinet through a pipeline for caching, and then enters a generator set for lean-burn power generation after secondary cold-dry dehydration, pressurization and air mixing. For the existing biogas generator set, the protection of the generator set mainly considers the state of the gas holder very little in the unit itself, so that under the condition of not monitoring the gas holder in real time, an operator needs to go round to check the state of the gas holder, and starts or stops the generator set according to the gas amount, thereby being incapable of realizing 24-hour unattended operation.
Therefore, in order to realize 24-hour unattended operation of the biogas generator set, it is particularly necessary to monitor the gas volume state of the gas holder in real time, so that when the gas volume in the gas holder is insufficient, the generator set, a booster fan, a refrigeration drying unit and the like which are matched with the generator set can be automatically stopped, the gas holder and a fermentation tank top film are prevented from being damaged due to negative pressure, and the operation safety of the unit is ensured.
In the existing biogas generator set, some monitoring devices commonly used comprise a Hall proximity switch, a photoelectric switch and the like, but the sensitivity and reliability of the monitoring devices have problems. For example, the hall proximity switch has a small sensing area and has the problem of magnetic induction degradation, while the photoelectric switch has the problems of dust interference and the like, so that the high accuracy and the high reliability of measurement cannot be met, and the disconnection problem caused by the fact that the real-time feeding and accurate measurement cannot be performed exists between the operation of the biogas generator set and the real-time state of the gas cabinet.
It is in this context that the present invention has emerged.
Disclosure of Invention
The object of the solution of the present invention is to at least partially solve the problems highlighted above and to provide an improved solution to the problems of safe operation of biogas generator sets and real-time status detection of gas cabinets in general.
More specifically, the invention aims to solve the problem that the operation and the gas cabinet state of the biogas generator set are disconnected, and a high-reliability gas cabinet height monitoring device is found, so that whether the generator set and related devices are stopped or not and an alarm signal is sent out automatically through monitoring signals, and further, the gas storage cabinet, the fermentation tank top film and the unit are protected.
Therefore, the invention provides a shutdown system of a biogas generator set based on a gas holder state, which comprises: a detection unit located on a mounting bracket at the top of a gas holder and configured to detect a gas bag height state of the gas holder; a control unit connected with the detection unit and configured to be connected with a generator set and associated devices of the generator set; and a signal transmission unit which connects the detection unit and the control unit and is configured to transmit a detection result of the detection unit to the control unit, wherein the control unit is further configured to compare the detection result of the detection unit with a predetermined threshold value and control whether the generator set and associated devices of the generator set are stopped based on the comparison result.
In some embodiments, the detection unit comprises an ultrasonic level gauge for detecting the height of an air bag of the gas holder. In some embodiments, the ultrasonic level gauge comprises an electronics unit, mounting threads, and a sensor, and the sensor is mounted via the mounting threads to lie perpendicular to the mounting bracket and facing a weight rack upper plane of the gas tank. In other embodiments, the ultrasonic level gauge is mounted to extend 30cm to 50cm into the mounting surface. In other embodiments, the ultrasonic level gauge is positioned on the mounting bracket proximate to the sidewall.
By adopting the ultrasonic level meter, more reliable monitoring can be realized than a Hall proximity switch and a photoelectric switch, and the ultrasonic level meter is simple to install and convenient for system maintenance. Through converting the gas holder height to the signal output that corresponds to the control unit, be favorable to the control unit to judge fast whether need make generating set and supporting device shut down, can realize the real time control of gas holder height and unit running state.
In some embodiments, when the detection result is less than the predetermined threshold, the control unit sends a shutdown instruction to shutdown the generator set and associated devices of the generator set.
In other embodiments, it further comprises an alarm device connected to the control unit, the alarm device configured to: issuing a warning when the control unit stops the generator set and associated devices of the generator set until the warning device is manually reset. In some embodiments, the alarm device is a buzzer.
Through setting up such alarm device, can in time remind the operator current tolerance not enough to prevent to cause the damage to equipment.
In some embodiments, the device further comprises a power supply device connected with the detection unit and the control unit for providing power to the detection unit, the power supply device being configured to be controlled by the control unit.
With the power supply apparatus thus controlled, the control unit can also effect starting and stopping of the detection unit to perform operations such as maintenance, replacement, and the like on the detection unit.
In some embodiments, the control unit employs a Programmable Logic Controller (PLC).
In some embodiments, the signal transmission unit comprises a signal shielding cable having one end connected to the output of the detection unit and the other end connected to the input of the control unit. In other embodiments, the signal shielded cables are routed through galvanized tubing and along the outer frame of the gas holder from top to bottom.
By using such signal shielded cables, an accurate transmission of the signals can be achieved, ensuring that the current gas volume status can be correctly judged in the control unit, and thus compared to predetermined thresholds in the control unit, to take appropriate start-stop control of the devices in the system.
In some embodiments, the devices associated with the generator set include a booster fan and a chiller dryer. The present invention is not limited thereto and the apparatus associated with the generator set may also include other apparatus associated with the generator set.
These and other advantages of the present invention will be appreciated by those skilled in the art upon review of the entire specification and claims.
Drawings
For a better understanding of the present invention, a preferred embodiment thereof will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of an embodiment of a shutdown system using a biogas generator set based on a gas holder status according to an embodiment of the present invention.
FIG. 2 is a schematic view of the installation of the ultrasonic level gauge in the embodiment of FIG. 1.
FIG. 3 is a schematic diagram of the composition of the ultrasonic level gauge in the embodiment of FIG. 1.
Fig. 4 is a schematic diagram of electrical connections of a programmable controller in one embodiment of a biogas generator set shutdown system based on a gas holder status, according to an embodiment of the invention.
Detailed Description
The following describes an embodiment of the present invention with reference to the drawings. In the following description of the embodiments of the present invention, some specific features are described in order to better understand the present invention, but it is apparent that not all of the features are necessary to implement the present invention to those skilled in the art. The embodiments of the present invention described below are merely exemplary embodiments of the present invention, which should not be construed as limiting the present invention. In addition, some well-known techniques have not been described in order to avoid obscuring the present invention.
Referring now to fig. 1, a schematic diagram of a shutdown lockout control system 100 for a biogas generator set using a gas cabinet status based according to an embodiment of the present invention is shown. Fig. 1 exemplarily shows a complete mixing fermenter 101, a gas holder 102, a generator set 104, and a controller 105. The top of the gas holder 102 is provided with a detection device for detecting the height state of the air bag of the gas holder 102, and the detection device is interactively connected with the controller through a signal line. In addition, the control unit interfaces with the genset 104 via control lines. Fig. 1 also shows a booster fan 106 associated with the genset 104 and a chiller dryer 103 connecting the gasometer 102 and the booster fan 106. A controller 105 is associated with the booster fan 106 and the freeze dryer 103 by control lines for controlling whether they are shut down for operation.
To enable real-time monitoring of the state of the gas volume in the gas holder 102, in one embodiment of the invention, an ultrasonic level meter is used to detect the airbag height of the gas holder.
More specifically, referring to fig. 2, there is shown an example of using an ultrasonic level gauge in a biogas generator set shutdown system based on a gas tank state according to an embodiment of the present invention.
FIG. 2 shows in detail the mounting of the ultrasonic level gauge 200 on a gas holder. More specifically, in this embodiment, the ultrasonic level gauge 200 is mounted on one side of the frame at the top of the gas cabinet, near the inner wall thereof. The level meter may be fixed in various ways, for example, a bracket for fixing the ultrasonic level meter may be installed on an outer frame of the gas storage tank, and a hole having the same size as the caliber of the level meter may be provided on the bracket to fix the ultrasonic level meter. Furthermore, the ultrasound may also be fixed to the outer frame by other attachments, such as by stitching or adhesive bonding.
FIG. 3 shows one embodiment of an ultrasonic level gauge. In this embodiment, the ultrasonic level gauge comprises an electronics unit 201, mounting threads 202 and a sensor 203, which are integrally connected from top to bottom. Under the control of the electronic unit 201, the sensor 203 transmits a beam of ultrasonic pulses to the object to be measured, the ultrasonic waves are reflected by the surface of the object, and the reflected echoes are received by the ultrasonic probe of the sensor 203 and converted into electric signals. The transmission from the ultrasonic wave is received again, and the time is proportional to the distance from the probe to the object to be measured. The electronic unit detects the time to calculate the detected distance, and then the height of the gas holder is obtained.
In this embodiment, the attachment may be via mounting threads 202 when installing the ultrasonic level meter. The sensor 203 is mounted via this mounting thread 202 and is mounted perpendicular to its mounting bracket. The sensor of the level meter and the upper plane of the balance weight frame of the gas storage cabinet are in a vertical state, and in the level measurement process, ultrasonic signals are sent out by the ultrasonic probe, reflected by the surface of a measured object, then reflected back, received by the same probe, and the whole round trip time of ultrasonic waves is measured, so that the level measurement is realized, and the vertical measurement can ensure that the detected signals are more accurate.
In addition, the ultrasonic level meter mounting bracket extends into the position 30-50cm away from one side of the upper plane of the gas storage cabinet counterweight frame, and the ultrasonic level meter is firmly mounted to prevent the ultrasonic level meter from loosening.
In the device of the present invention, in order to ensure the correctness of the signal, it is preferable that the detection signal is connected to the controller through a shielded signal cable. For example, in one embodiment, a hyperThe acoustic level gauge has an analog signal output of 4-20 mA, which can be measured, for example, by RVVP2 x 0.75mm2The signal shielded wire of (2) is overhead wired. For another example, in one embodiment, the signal shielded wires may be routed from top to bottom along the enclosed sunlight panels of the outer frame of the gas cabinet to the ground, with an aperture being made in the enclosed sunlight panels of the outer frame of the gas cabinet to facilitate overhead wiring.
In order to enable the detected signal to be transmitted more accurately, it is preferable to wire the signal shielded wire through a galvanized pipe. In addition, cross-wiring with strong electricity should be avoided in overhead wiring to prevent signal interference.
Said signal line is laid to a controller in which a predetermined threshold value is set, and in which the detection signal is compared with the predetermined threshold value, for example, when the value of the parameter to which the detection signal corresponds is less than the predetermined threshold value, indicating that the air quantity is insufficient, the controller may issue a stop command to automatically stop the generator set and may also stop the associated device associated with the generator set. For example, in the exemplary system of fig. 1, the controller 105 may issue a shutdown command to shutdown the genset 104 and its associated booster fan 106 and chiller dryer 103 upon determining that the amount of gas in the gasometer is insufficient.
Further, the controller may be further connected to a power source of the detection device to control power supplied to the detection device. Thus, the controller may control the activation and deactivation of the detection device to facilitate operator replacement or maintenance of the detection device. The controller may also be connected to or integrated with an alarm device whereby an alarm may be issued while the gas cabinet is detected to be out of gas and shut down the generator set and its associated equipment until the alarm device is manually reset.
More specifically, FIG. 4 shows an electrical control wiring schematic employing a programmable controller (PLC) as the controller and used in conjunction with the ultrasonic level gauge described previously. As shown in FIG. 4, an AC220V/DC24V switching power supply may be installed for providing direct current power to the ultrasonic level gauge. Specifically, an L line (commonly called as a live line) of 220V is connected to an L end of a switching power supply, an N line (commonly called as a zero line) is connected to an N end of the switching power supply, a V + pole of the switching power supply is connected to a + pole of an ultrasonic level meter through a lead, an output end of the ultrasonic level meter is connected to an input end of a programmable controller, and an output end of the PLC is connected to a V-end of the switching power supply.
The operator can set the threshold value in the PLC controller according to actual needs. For example, the threshold value may be set to 0.5 m. In this case, when the height of the gas holder is 0.5m from the ground, the controller will issue a stop command to stop the generator set and its associated devices. The PLC controller can also control the buzzer to give an alarm, and the buzzer stops giving out buzzing sound until the alarm signal is reset artificially. In the case of a buzzer, it is preferable to install the buzzer in the genset control room for easy detection by field personnel without excessive sound.
An exemplary process of monitoring the state of the gas amount in the gas holder may be that first, a probe of a sensor of the ultrasonic level meter transmits ultrasonic waves, which are reflected by the surface of the object to be measured and then reflected back, and received by the same probe, measures the entire round trip time of the ultrasonic waves to calculate the height of the gas holder, and converts the detection result of the height of the gas holder into a corresponding electrical signal. Then, the detection result is transmitted to the controller through the signal transmission line. And comparing the detection result with a preset threshold value in the controller to judge whether the air quantity in the gas holder is insufficient, and when the air quantity is judged to be insufficient, sending a shutdown instruction by the controller to shut down the generator set and the related devices thereof. In addition, the controller can send the stop command and an alarm through the alarm device to inform an operator of the next operation.
The device provided by the invention can realize high-reliability gas holder height monitoring, automatically judge whether the generator set is shut down or not and send out an alarm signal through the monitoring signal so as to protect the safety of the gas holder, the fermentation tank top film and the generator set.
While this invention has been described in terms of a preferred embodiment, there are alterations, permutations, and various substitute equivalents, which fall within the scope of this invention. It should also be noted that there are many alternative ways of implementing the processes of the present invention. It is therefore intended that the following appended claims be interpreted as including all such alterations, permutations, and various substitute equivalents as fall within the true spirit and scope of the present invention.
Claims (7)
1. The utility model provides a marsh gas generating set shutting down locking system based on gas holder state which characterized in that includes:
the detection unit is positioned on the mounting bracket on one side of the top of the external frame of the gas holder and is configured to detect the height state of the air bag in the gas holder;
a control unit connected with the detection unit and configured to be connected with a generator set and associated devices of the generator set, the detection unit including an ultrasonic level meter for detecting an airbag height of the gas holder, the ultrasonic level meter including an electronic unit, a mounting thread, and a sensor, and the sensor being mounted via the mounting thread to be placed perpendicular to the mounting bracket and facing a top plane of a weight holder of the gas holder, the ultrasonic level meter being mounted to protrude 30cm to 50cm from one side of the top plane of the weight holder, the ultrasonic level meter being positioned on the mounting bracket near a side wall; and
a signal transmission unit connected to the detection unit and the control unit and configured to transmit a detection result of the detection unit to the control unit, the signal transmission unit including a signal shielding cable having one end connected to an output end of the detection unit and the other end connected to an input end of the control unit, the signal shielding cable passing through a galvanized pipe and being wired from top to bottom along an outer frame of the gas holder;
wherein the control unit is further configured to compare the detection result of the detection unit with a predetermined threshold and to control whether the generator set and associated devices of the generator set are shut down based on the comparison result.
2. The gas cabinet status-based biogas generator set shutdown lockout system of claim 1, wherein the control unit sends a shutdown command to stop the generator set and associated devices of the generator set when the detection result is less than the predetermined threshold.
3. The gasholder status-based biogas generator set shutdown lockout system of claim 1, further comprising an alarm device connected to the control unit, the alarm device configured to: issuing a warning when the control unit stops the generator set and associated devices of the generator set until the warning device is manually reset.
4. The biogas generator set shutdown lockout system of claim 3, wherein the alarm device is a buzzer.
5. The gasholder status-based biogas generator set shutdown lockout system of claim 1, further comprising a power supply device connected with the detection unit and the control unit for providing power to the detection unit, the power supply device configured to be controlled by the control unit.
6. The biogas generator set shutdown lockout system of claim 1, wherein the control unit employs a Programmable Logic Controller (PLC).
7. The biogas genset shutdown lockout system based on a gas cabinet state of claim 1 wherein the genset associated devices include a booster fan and a chiller dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367383.0A CN109611204B (en) | 2018-11-16 | 2018-11-16 | Biogas generating set shuts down locking system based on gas holder state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367383.0A CN109611204B (en) | 2018-11-16 | 2018-11-16 | Biogas generating set shuts down locking system based on gas holder state |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109611204A CN109611204A (en) | 2019-04-12 |
| CN109611204B true CN109611204B (en) | 2021-03-23 |
Family
ID=66004134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811367383.0A Active CN109611204B (en) | 2018-11-16 | 2018-11-16 | Biogas generating set shuts down locking system based on gas holder state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109611204B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6044806A (en) * | 1997-12-19 | 2000-04-04 | Caterpillar Inc. | Method and apparatus for detecting gaseous fuel leakage through a gaseous fuel admission valve within an engine |
| CN201359192Y (en) * | 2009-03-03 | 2009-12-09 | 史秋华 | Efficient marsh gas supply device |
| CN204026124U (en) * | 2014-08-12 | 2014-12-17 | 山东百盛生物科技有限公司 | Wet gasholder |
| CN206572203U (en) * | 2017-01-09 | 2017-10-20 | 青岛天人环境股份有限公司 | Dry gas-holder intelligent controlling device |
| CN107524916A (en) * | 2017-10-20 | 2017-12-29 | 上海林海生态技术股份有限公司 | A kind of gas tiny structure detection and safe discharge equipment |
| CN107939715A (en) * | 2017-10-20 | 2018-04-20 | 上海林海生态技术股份有限公司 | A kind of low pressure gas-holder and booster fan inter-linked controlling method |
-
2018
- 2018-11-16 CN CN201811367383.0A patent/CN109611204B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6044806A (en) * | 1997-12-19 | 2000-04-04 | Caterpillar Inc. | Method and apparatus for detecting gaseous fuel leakage through a gaseous fuel admission valve within an engine |
| CN201359192Y (en) * | 2009-03-03 | 2009-12-09 | 史秋华 | Efficient marsh gas supply device |
| CN204026124U (en) * | 2014-08-12 | 2014-12-17 | 山东百盛生物科技有限公司 | Wet gasholder |
| CN206572203U (en) * | 2017-01-09 | 2017-10-20 | 青岛天人环境股份有限公司 | Dry gas-holder intelligent controlling device |
| CN107524916A (en) * | 2017-10-20 | 2017-12-29 | 上海林海生态技术股份有限公司 | A kind of gas tiny structure detection and safe discharge equipment |
| CN107939715A (en) * | 2017-10-20 | 2018-04-20 | 上海林海生态技术股份有限公司 | A kind of low pressure gas-holder and booster fan inter-linked controlling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109611204A (en) | 2019-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102563363A (en) | Liquid leakage detecting positioning system | |
| CN110407063A (en) | Mine shaft hoist system rigid cage guide method for real-time monitoring and system | |
| CN109611204B (en) | Biogas generating set shuts down locking system based on gas holder state | |
| CN105957569B (en) | A kind of nuclear power station spent fuel reservoir monitoring device | |
| WO2020098111A1 (en) | Mine radar level monitoring device | |
| CN104569679B (en) | A kind of unloaded Durable test system of electric tool and garden instrument | |
| CN209458034U (en) | A kind of Biogas Generator Set safe shutdown protective device | |
| CN210949183U (en) | Deep-well pump detection device | |
| CN207380124U (en) | A kind of power-off of base station sensing detection device | |
| CN203274845U (en) | Liquid level detection device for slurry | |
| CN110043803A (en) | A kind of pipeline abnormality detector and system | |
| CN215932817U (en) | Gas safety uses monitoring device based on thing networking | |
| CN216174880U (en) | Movable automatic purging device of liquid level meter | |
| CN211855493U (en) | Continuous liquid level monitoring system for air cushion bin | |
| CN107576370A (en) | A kind of external labeling type liquid level checking method of redundancy | |
| CN207395888U (en) | Substation Station circle noise-measuring system | |
| CN209820547U (en) | Electromagnetic flowmeter with fault self-diagnosis function | |
| CN205537864U (en) | Steel band formula powder position measuring device | |
| CN216485552U (en) | Pipeline surveys clamp with safety protection structure | |
| CN220709311U (en) | Off-line diagnosis device for generator rotor | |
| CN210638779U (en) | Water level monitoring device | |
| CN109255916A (en) | Distribution transformer protection against electric shock active alarm system | |
| CN213364804U (en) | Device for measuring rotating speed and reverse rotation of water feeding pump | |
| CN110658452A (en) | Non-electric power relay calibration device | |
| CN219477289U (en) | Multifunctional self-detection shore power box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| 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 invention: A shutdown locking system of biogas generator set based on gas holder state Effective date of registration: 20220307 Granted publication date: 20210323 Pledgee: China Construction Bank Corporation Funan sub branch Pledgor: SHANGHAI LINHAI ECOLOGICAL TECHNOLOGY CO.,LTD. Registration number: Y2022980002188 |