CN111124001A - Pipeline pressure control system and control method - Google Patents
Pipeline pressure control system and control method Download PDFInfo
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- CN111124001A CN111124001A CN202010006907.4A CN202010006907A CN111124001A CN 111124001 A CN111124001 A CN 111124001A CN 202010006907 A CN202010006907 A CN 202010006907A CN 111124001 A CN111124001 A CN 111124001A
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- pressure
- pipeline
- controller
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- safety valve
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
A pipeline pressure control system comprises a safety valve and a pressure sensor which are arranged on a pipeline, and a controller, wherein the safety valve comprises a valve core and a motor for driving the valve core, the controller is electrically connected with the motor and the pressure sensor of the safety valve, the pressure sensor detects the pressure in the pipeline and feeds the pressure back to the controller, an upper limit pressure, a lower limit pressure and a middle pressure are prestored in the controller, the middle pressure is the middle value of the upper limit pressure and the lower limit pressure, the controller compares the pipeline pressure fed back by the pressure sensor with the prestored upper limit pressure, the lower limit pressure and the middle pressure, controls the operation of the motor of the safety valve according to the comparison result, keeps the pipeline pressure close to the middle pressure, reduces the phenomenon that the safety valve is repeatedly opened and closed, prolongs the service life of the safety valve, and effectively ensures the stability of the pressure of flare gas output by the pipeline, the stability of the subsequent combustion of the flare gas is ensured.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to a pipeline pressure control system and a pipeline pressure control method.
Background
In flare combustion systems, hydrocarbon flare gas (which may contain H) is discharged from the refinery2S acid gas) is delivered to the combustor via a gas delivery pipeline for combustion, so that the flare gas is converted into products which do not damage the environment and then is discharged into the environment. With the development of large-scale refining devices, the discharged flare gas is greatly increased, so that the device is suitable for the large-scale refining devicesA safety valve is usually installed on the gas supply pipeline, and the pressure of the fluid in the pipeline is adjusted and controlled by opening and closing the safety valve.
The logic of pressure control of existing relief valves is to limit the relief valve opening or closing by setting upper and lower limits, which causes the pressure in the pipe to generally remain at the upper or lower limit. However, when the pressure approaches the critical value, the safety valve may be repeatedly opened and closed, which not only reduces the life of the safety valve, but also affects the stability of the pressure of the fluid in the pipeline and the stability of subsequent combustion of the burner.
Disclosure of Invention
In view of the above, a pipeline pressure control system and a control method are provided that may solve or at least alleviate the above-mentioned problems.
In one aspect, the present invention provides a pipeline pressure control system, including a safety valve and a pressure sensor disposed on a pipeline, and a controller, where the safety valve includes a valve core and a motor driving the valve core, the controller is electrically connected to the motor and the pressure sensor of the safety valve, the pressure sensor detects a pressure in the pipeline and feeds the pressure back to the controller, an upper limit pressure, a lower limit pressure, and an intermediate pressure are prestored in the controller, the intermediate pressure is a middle value between the upper limit pressure and the lower limit pressure, and the controller compares the pipeline pressure fed back by the pressure sensor with the prestored upper limit pressure, lower limit pressure, and intermediate pressure, and controls an operation of the motor of the safety valve according to a comparison result.
Preferably, when the pipeline pressure fed back by the pressure sensor is greater than the pre-stored intermediate pressure and less than the upper limit pressure, the controller generates a signal to start the motor to drive the valve plug to act, so that the safety valve is closed.
Preferably, when the pipeline pressure fed back by the pressure sensor is smaller than the pre-stored intermediate pressure and larger than the lower limit pressure, the controller generates a signal to start the motor to drive the valve plug to act, so that the safety valve is opened greatly.
Preferably, when the pipeline pressure fed back by the pressure sensor approaches the pre-stored intermediate pressure, the controller generates a signal to turn off the motor, and the safety valve stops acting.
Preferably, the controller generates a signal to turn off a portion of the burner when the line pressure fed back by the pressure sensor is less than a pre-stored lower limit pressure.
Preferably, the controller generates a signal to open more burners when the pipe pressure fed back by the pressure sensor is greater than a pre-stored upper limit pressure.
Preferably, the safety valve is an electric pressure reducing valve or an electric regulating valve.
Preferably, the pressure sensor is disposed at an outlet side of the safety valve.
In another aspect, the present invention provides a method for controlling a pressure of a pipeline, comprising the steps of:
setting a pre-stored pressure, wherein the pre-stored pressure comprises an upper limit pressure, a lower limit pressure and a middle pressure, and the middle pressure is the middle value of the upper limit pressure and the lower limit pressure;
detecting the pressure of the pipeline;
comparing the detected pipeline pressure with a pre-stored pressure, and if:
closing part of the burners when the pipeline pressure is less than the pre-stored lower limit pressure; or
The pipeline pressure is smaller than the pre-stored middle pressure and larger than the pre-stored lower limit pressure, and the safety valve is opened to increase the pipeline pressure; or
The pipeline pressure approaches the pre-stored intermediate pressure, and the safety valve stops acting; or
The pipeline pressure is greater than the prestored intermediate pressure and less than the prestored upper limit pressure, and the safety valve is closed to reduce the pipeline pressure; or
The pipeline pressure is greater than the pre-stored upper limit pressure, and more burners are started.
Preferably, the detection line pressure is a pressure of the detection line at an outlet side of the safety valve.
Compared with the prior art, the pipeline pressure control system and the control method have the advantages that the intermediate pressure is prestored in the controller and is used as the basis for stopping the safety valve, so that the pressure of the pipeline is kept near the intermediate pressure, the phenomenon that the safety valve is repeatedly opened and closed is reduced, the service life of the safety valve is prolonged, the pressure in the pipeline is prevented from approaching the upper limit and the lower limit of the pressure, the safety of the pipeline is ensured, the stability of the pressure of the flare gas output by the gas supply pipeline is effectively ensured, and the stability of the subsequent combustion of the flare gas is ensured.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a system for controlling pipeline pressure according to the present invention.
FIG. 2 is a flow chart of an embodiment of a method for controlling pipeline pressure according to the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. One or more embodiments of the present invention are illustrated in the accompanying drawings to provide a more accurate and thorough understanding of the disclosed embodiments. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein.
The pipeline pressure control system and the control method are used for adjusting and controlling the fluid pressure in the pipeline, and the control system comprises a safety valve, a pressure sensor and a controller, wherein the safety valve and the pressure sensor are arranged on the pipeline, and the controller is connected with the pressure sensor and the safety valve. Referring now to FIG. 1, the piping pressure control system of the present invention is illustrated in detail using an example plenum 10 for use in a flare combustion system. In the embodiment shown in fig. 1, the air supply conduit 10 includes a main conduit 12 and a plurality of branch conduits 14 in communication with the main conduit 12. The main pipeline 12 is connected with a flare gas discharge port and receives flare gas to be treated; the branch pipe 14 feeds the flare gas to different burners, pilot lights, and the like to be burned, and the flow direction of the flare gas in the gas feed pipe 10 is shown by arrows in the drawing. Preferably, the burners are multi-layer burners and each layer of burners can be controlled individually, typically the burners are turned on or off layer by layer.
A main safety valve 20 and a main pressure sensor 22 are provided on the main pipe 12. The main circuit relief valve 20 is preferably an electric pressure reducing valve including a valve element and a motor 21 for driving the valve element. The main circuit pressure sensor 22 is disposed near the main circuit relief valve 20 and on the outlet side of the main circuit relief valve 20 for detecting the pressure P of the main pipe 12 near the outlet side of the main circuit relief valve 20. The main pressure sensor 22 and the motor 21 of the main safety valve 20 are connected by the controller 24 to form a feedback loop, and the three components together form a pressure control system of the main pipe 12, and the electrical connection relationship among the pressure sensor 22, the motor 21 of the main safety valve 20, and the controller 24 is shown by a dotted line in the figure.
A branch relief valve 26 and a branch pressure sensor 28 are provided on each of the branch pipes 14. The bypass relief valve 26 is preferably an electrically operated regulator valve comprising a valve spool and a motor 27 for driving the valve spool. The branch pressure sensor 28 is disposed near the branch relief valve 26 and on the outlet side of the branch relief valve 26 for detecting the pressure p of the branch pipe 14 near the outlet side of the branch relief valve 26. The branch pressure sensor 28 on each branch pipe 14 and the motor 27 of the branch safety valve 26 are also connected through the controller 24 to form a feedback loop, and the branch pressure sensor 28, the safety valve 26 and the controller 24 together form a pressure control system of the branch pipe 14.
The controller 24 may be a computer, a single chip, or the like, and a set of pressure data is pre-stored in the controller 24 corresponding to the control system on each pipeline 10. In this embodiment, a group of main circuit pressure data, including a main circuit upper limit pressure Pmax, a main circuit lower limit pressure Pmin, and a main circuit intermediate pressure Pmid, is prestored in the controller 24 corresponding to the main pipe 12. The intermediate pressure Pmid is the intermediate value between the upper limit pressure Pmax and the lower limit pressure Pmin, and Pmid is (Pmax + Pmin)/2; for each branch line 14, a set of branch line pressure data, including a branch line upper limit pressure pmax, a branch line lower limit pressure pmin, and a branch line intermediate pressure pmid, is prestored in the controller 24. The intermediate pressure pmid is an intermediate value between the upper limit pressure pmax and the lower limit pressure pmin, and pmid is (pmax + pmin)/2.
The main path pressure data Pmax, Pmin and Pmid pre-stored in the controller 24 are different from the branch path pressure data Pmax, Pmin and Pmid of each group. In addition, the sets of branch pressure data pmax, pmin, pmid may be the same or different depending on the specific design of each branch conduit 14.
The pipeline pressure control system controls the pressure values in the pipelines 12 and 14 to be about the intermediate pressure Pmid and Pmid by increasing the intermediate pressure Pmid and Pmid, and the control method comprises the following steps: firstly, detecting the fluid pressure P (p) in the pipeline 12 (14); secondly, comparing the detected pressure P (p) with prestored pressure data Pmax, Pmin and Pmid (Pmax, Pmin and Pmid); finally, the motor 21(27) of the safety valve 20(26) is driven to perform corresponding actions according to the comparison result, so as to drive the safety valve 20(26) to open or close, and the pressure in the pipeline 12(14) is adjusted to about the intermediate pressure Pmid (pmid). Referring to fig. 2, the pipeline pressure control method of the present invention is specifically described by taking the main pipeline 12 as an example:
first, the main circuit pressure sensor 22 senses the pressure P of the main circuit 12 at the outlet side of the main circuit safety valve 20 and feeds it back to the controller 24 in real time;
then, the controller 24 compares the pressure P of the main pipe 12 fed back by the main pipe pressure sensor 22 with the pre-stored main pipe pressure data Pmax, Pmin, Pmid, if:
p ≦ Pmin, that is, the pressure P of the main pipe 12 does not reach the lower limit pressure Pmin, indicating that the flow rate in the main pipe 12 is too low and the pressure is too low, at this time, the controller 24 generates a signal S1 to prompt that the number of layers in which the burners are turned on should be reduced, if it is detected that the pressure P of the main pipe 12 is less than Pmin when the tri-layer burner is turned on, the tri-layer burner is turned off, and if the pressure P of the main pipe 12 is still less than Pmin after the tri-layer burner is turned off, the second-layer burners are turned off in sequence until the pressure P of the main pipe 12; or
Pmin < P < Pmid, that is, the pressure P of the main pipe 12 is higher than the lower limit pressure Pmid and lower than the middle pressure Pmid, the controller 24 generates a signal S2 to start the motor 21 of the safety valve 20, the motor 21 drives the spool of the safety valve 20 to rotate so as to open the safety valve 20, and the pressure P of the main pipe 12 is increased; or
P → Pmid, i.e. the pressure P of the main pipe 12 approaches the intermediate pressure Pmid, the controller 24 generates a signal S3 to close the motor 21 of the relief valve 20, the spool of the relief valve 20 stops operating, and the pressure P of the main pipe 12 is maintained at about Pmid; or
Pmax > P > Pmid, namely the pressure P of the main pipeline 12 is higher than the middle pressure Pmid and lower than the upper limit pressure Pmax, the controller 24 generates a signal S4 to start the motor 21 of the safety valve 20, the motor 21 drives the valve core of the safety valve 20 to rotate so as to close the safety valve 20, and the pressure P of the main pipeline 12 is reduced; or
P ≧ Pmax, that is, the pressure P of the main pipeline 12 exceeds the upper limit pressure Pmax, which indicates that the flow in the main pipeline 12 is too large and the pressure is too high at this time, the controller 24 generates a signal S5 to prompt that the number of layers for which the combustor is opened should be increased, if the pressure P of the main pipeline 12 is detected to be ≧ Pmax under the condition of opening the three-layer combustor, the combustor in the fourth layer is opened, and if the pressure P of the main pipeline 12 after the combustor in the fourth layer is opened is still higher than Pmax, the combustors in the fifth layer are sequentially opened until the pressure P of the main pipeline 12 is lower than Pmax.
The pipeline pressure control system controls the number of the opened layers of the combustor by comparing the pressure P of the main pipeline 12 with the pre-stored upper limit pressure Pmax and lower limit pressure Pmid, so that the pressure P of the main pipeline 12 is between the upper limit pressure Pmax and the lower limit pressure Pmid, the opening of the combustor can be linked with the controller 24 to form automatic control, namely signals S1 and S5 generated by the controller 24 are used as starting signals of a combustor switch, the opening of the combustor can also be manually controlled, and an operator carries out corresponding operation according to the signals S1 and S5 of the controller 24. Meanwhile, the intermediate pressure Pmid is set, the valve core of the safety valve 20 is adjusted to maintain the pressure P of the main pipeline 12 near the intermediate pressure Pmid, the phenomenon that the safety valve 20 is repeatedly opened and closed is reduced, the service life of the safety valve 20 is prolonged, and the safety of the main pipeline 12 is ensured.
Similarly, the pressure regulation on the branch conduit 14 comprises the following steps: first, each branch pressure sensor 28 feeds back the pressure p of the branch pipe 14 to the controller 24; the controller 24 then compares the pressure p of the branch line 14 with the pre-stored branch pressure data pmax, pmin, pmid if:
p ≦ pmin, i.e., the pressure p of the branch line 14 does not reach the lower limit pressure pmin, indicating that the flow in the branch line 14 is too low and the pressure is too low, the controller 24 generates a signal s1 to reduce the number of burner opening stages appropriately until the pressure p of the branch line 14 exceeds pmin; or
pmin < p < pmid, that is, the pressure p of the branch pipe 14 is greater than the lower limit pressure pmin and lower than the intermediate pressure pmid, the controller 24 generates a signal s2 to start the motor 27 of the safety valve 26, the motor 27 drives the spool of the safety valve 26 to rotate to open the safety valve 26, and the p of the branch pipe 14 is raised; or
p → pmid, i.e. the pressure p of the branch line 14 approaches the intermediate pressure pmid, the controller 24 generates a signal s3 to close the motor 27 of the relief valve 26, the spool of the relief valve 26 stops operating, and the pressure p of the branch line 14 is maintained at about pmid; or
pmax > p > pmid, namely the pressure p of the branch pipe 14 is higher than the middle pressure pmid and lower than the upper limit pressure pmax, the controller 24 generates a signal s4 to start the motor 27 of the safety valve 26, the motor 27 drives the valve core of the safety valve 26 to rotate to close the safety valve 26, and the p of the branch pipe 14 is reduced; or
p ≧ pmax, i.e., the pressure p of the branch line 14 exceeds the upper limit pressure pmax, which indicates that the flow in the branch line 14 is excessive and the pressure is too high, the controller 24 generates a signal s5 to increase the number of burner firing stages appropriately until the pressure p of the branch line 14 falls below pmax.
The pipeline pressure control system and the control method of the invention pre-store the intermediate pressure Pmid and Pmid in the controller 24 and use the intermediate pressure Pmid and Pmid as the basis for the stop action of the safety valves 20 and 26, so that the pressure of the pipelines 12 and 14 is kept near the intermediate pressure Pmid and Pmid, the phenomenon of repeated opening and closing of the safety valves 20 and 26 is reduced, the service lives of the safety valves 20 and 26 are prolonged, the pressure in the pipelines 12 and 14 is prevented from approaching the upper limit and the lower limit, the safety of the pipelines 12 and 14 is ensured, the stability of the pressure of the flare gas output by the gas supply pipelines 12 and 14 is also effectively ensured, and the stability of the subsequent combustion of the flare gas is.
It should be noted that the present invention is not limited to the above-mentioned embodiments, and other changes and modifications can be made by those skilled in the art according to the spirit of the present invention, and these changes and modifications made according to the spirit of the present invention should be included in the scope of the present invention as claimed.
Claims (10)
1. The utility model provides a pipeline pressure control system, is including setting up relief valve and pressure sensor on the pipeline and controller, the relief valve includes the valve core and drives the motor of valve core, the controller electricity is connected the motor and the pressure sensor of relief valve, its characterized in that, pressure sensor detects the pressure in the pipeline and feeds back to the controller, prestore upper limit pressure, lower limit pressure and intermediate pressure in the controller, intermediate pressure is the median of upper limit pressure and lower limit pressure, the controller compares the pipeline pressure of pressure sensor feedback and prestore upper limit pressure, lower limit pressure and intermediate pressure to the operation of the motor of relief valve is controlled according to the comparative result.
2. The line pressure control system of claim 1, wherein when the line pressure fed back by the pressure sensor is greater than the pre-stored intermediate pressure and less than the upper limit pressure, the controller generates a signal to activate the motor-driven valve element to close the safety valve.
3. The line pressure control system of claim 1, wherein when the line pressure fed back by the pressure sensor is less than the pre-stored intermediate pressure and greater than the lower limit pressure, the controller generates a signal to activate the motor-driven valve element to open the safety valve.
4. The line pressure control system of claim 1, wherein the controller generates a signal to shut down the motor and deactivate the safety valve when the line pressure fed back from the pressure sensor approaches a pre-stored intermediate pressure.
5. The line pressure control system of claim 1, wherein the controller generates a signal to shut off a portion of the burner when the line pressure fed back by the pressure sensor is less than a pre-stored lower limit pressure.
6. The line pressure control system of claim 1, wherein the controller generates a signal to turn on more burners when the line pressure fed back by the pressure sensor is greater than a pre-stored upper limit pressure.
7. The line pressure control system of any one of claims 1-4, wherein the relief valve is an electrically operated pressure relief valve or an electrically operated regulator valve.
8. The line pressure control system of any one of claims 1-4, wherein the pressure sensor is disposed on an outlet side of the relief valve.
9. A method of pipeline pressure control comprising the steps of:
setting a pre-stored pressure, wherein the pre-stored pressure comprises an upper limit pressure, a lower limit pressure and a middle pressure, and the middle pressure is the middle value of the upper limit pressure and the lower limit pressure;
detecting the pressure of the pipeline;
comparing the detected pipeline pressure with a pre-stored pressure, and if:
closing part of the burners when the pipeline pressure is less than the pre-stored lower limit pressure; or
The pipeline pressure is smaller than the pre-stored middle pressure and larger than the pre-stored lower limit pressure, and the safety valve is opened to increase the pipeline pressure; or
The pipeline pressure approaches the pre-stored intermediate pressure, and the safety valve stops acting; or
The pipeline pressure is greater than the prestored intermediate pressure and less than the prestored upper limit pressure, and the safety valve is closed to reduce the pipeline pressure; or
The pipeline pressure is greater than the pre-stored upper limit pressure, and more burners are started.
10. The line pressure control method according to claim 9, wherein the detection line pressure is a pressure of the detection line at an outlet side of the relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006907.4A CN111124001A (en) | 2020-01-03 | 2020-01-03 | Pipeline pressure control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006907.4A CN111124001A (en) | 2020-01-03 | 2020-01-03 | Pipeline pressure control system and control method |
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| CN111124001A true CN111124001A (en) | 2020-05-08 |
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| CN202010006907.4A Withdrawn CN111124001A (en) | 2020-01-03 | 2020-01-03 | Pipeline pressure control system and control method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4229157A (en) * | 1977-10-04 | 1980-10-21 | Hitachi Shipbuilding & Engineering Company Limited | System for controlling feed of waste gas to ground flare |
| CN203147812U (en) * | 2013-03-20 | 2013-08-21 | 佛山市海天调味食品股份有限公司 | Marsh gas recovery control system |
| CN105299663A (en) * | 2015-12-04 | 2016-02-03 | 深圳智慧能源技术有限公司 | Pressure control fixed value adjusting system based on torch running working condition |
| CN106321915A (en) * | 2015-06-30 | 2017-01-11 | 江苏瑞朗博机械设备有限公司 | Automatic control anti-backfire system for valve |
| CN106383198A (en) * | 2016-11-24 | 2017-02-08 | 天津大学 | Device and method for simulating influence of diesel engine waste gas recirculation on tail gas exhaust |
| CN109424967A (en) * | 2017-08-25 | 2019-03-05 | 中石化广州工程有限公司 | A kind of ground flare step emission control device and method |
| CN109469920A (en) * | 2018-10-22 | 2019-03-15 | 天能电池集团（安徽）有限公司 | A kind of fiery temperature control system of boiler heating |
| CN208764330U (en) * | 2018-07-20 | 2019-04-19 | 宁波风腾燃具有限公司 | A kind of intelligent electric machine Safety control valve |
| CN109869749A (en) * | 2017-12-01 | 2019-06-11 | 林内株式会社 | Stove |
-
2020
- 2020-01-03 CN CN202010006907.4A patent/CN111124001A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4229157A (en) * | 1977-10-04 | 1980-10-21 | Hitachi Shipbuilding & Engineering Company Limited | System for controlling feed of waste gas to ground flare |
| CN203147812U (en) * | 2013-03-20 | 2013-08-21 | 佛山市海天调味食品股份有限公司 | Marsh gas recovery control system |
| CN106321915A (en) * | 2015-06-30 | 2017-01-11 | 江苏瑞朗博机械设备有限公司 | Automatic control anti-backfire system for valve |
| CN105299663A (en) * | 2015-12-04 | 2016-02-03 | 深圳智慧能源技术有限公司 | Pressure control fixed value adjusting system based on torch running working condition |
| CN106383198A (en) * | 2016-11-24 | 2017-02-08 | 天津大学 | Device and method for simulating influence of diesel engine waste gas recirculation on tail gas exhaust |
| CN109424967A (en) * | 2017-08-25 | 2019-03-05 | 中石化广州工程有限公司 | A kind of ground flare step emission control device and method |
| CN109869749A (en) * | 2017-12-01 | 2019-06-11 | 林内株式会社 | Stove |
| CN208764330U (en) * | 2018-07-20 | 2019-04-19 | 宁波风腾燃具有限公司 | A kind of intelligent electric machine Safety control valve |
| CN109469920A (en) * | 2018-10-22 | 2019-03-15 | 天能电池集团（安徽）有限公司 | A kind of fiery temperature control system of boiler heating |
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Application publication date: 20200508 |