CN202494937U - Automatic control device for gas pressure - Google Patents
Automatic control device for gas pressure Download PDFInfo
- Publication number
- CN202494937U CN202494937U CN2012201368869U CN201220136886U CN202494937U CN 202494937 U CN202494937 U CN 202494937U CN 2012201368869 U CN2012201368869 U CN 2012201368869U CN 201220136886 U CN201220136886 U CN 201220136886U CN 202494937 U CN202494937 U CN 202494937U
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- gas
- pressure
- valve
- pipe
- controller
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Abstract
The utility model provides an automatic control device for gas pressure. The device comprises a gas pipe, a hand-operated valve arranged in the gas pipe, and a pressure senor at the rear of the hand-operated valve. The device is characterized in that a bypass pipe is arranged in the front and the rear of the hand-operated valve in the gas pipe, wherein the by pass pipe is equipped with a control valve; that the control valve is electrically connected with a controller; and that the controller is also electrically connected with the pressure sensor. The gas pressure in a porch of a gas hydrogen-extracting unit can be conveniently and automatically adjusted, wherein the pressure is always adjusted to a direction in which an absolute value of a deviation between a given value and a measured value is decreased, thereby stabilizing the adjusted gas pressure, and supplying the gas with stable pressure to each device in the unit. Thus, each device can operate with high efficiency, service life of each device is prolonged, maintenance rate and cost are decreased, and labor intensity of workers is effectively reduced, thereby guaranteeing product quality eventually.
Description
Technical field
The utility model relates to a kind of control device, and particularly a kind of gas pressure automaton belongs to gas pressure control device technical field.
Background technology
Adopt pressure swing adsorption; The technological process of purifying hydrogen of hydrogen is from coke-oven gas: the coke-oven gas in self-purification workshop is sent in the gas-liquid separator in the future; To remove the condensed fluid of deentrainment; Afterwards the gas delivery compressor compresses and boost after, deliver to impurity such as the tar fog of removing in the pretreatment unit in the coal gas, high carbon alkane, benzene, naphthalene, sulfide, oxides of nitrogen, again after transformation absorption (PSA) separates; Most of impurity such as hydro carbons such as CO, CO2, O2, N2, CH4 and C2～C4 in the coke-oven gas are removed; Make hydrogen concentrate, purify to purity and reach more than 99.9%, this hydrogen is sent in the benzene hydrogenation device as the refining unstripped gas of benzene hydrogenation again through after the deoxygenation drying.Because the gas entry place of purifying hydrogen of hydrogen only is provided with the flap valve V101 of an artificial manual adjustment; And the inlet gas pressure requires at 3～4KPa, and gas pressure is unstable in addition, therefore; This unit operations worker maximum that has been adjusted to of gas entry pressure also is warm work; The effect of artificial adjustment is undesirable simultaneously, and pressure divergence surpasses ± 1.5KPa, and the instability of pressure also causes multistage air inlet of postorder gas compression pump and discharge pressure instability indirectly; And then influence the stability of subsequent production, finally influence the quality of benzaldehyde product.Long-term irregular operation also will damage accessory, shorten the turn(a)round of equipment, increase production cost.Therefore, be necessary to design a kind of device that can make the stable operation of inlet gas pressure, reduction labor strength and the cost of overhaul, raising operational efficiency are had very important significance.
Summary of the invention
The purpose of the utility model is to provide a kind of gas pressure automaton, makes coal gas propose stable, the efficient operation of inlet gas pressure of hydrogen unit, effectively reduces labor strength simultaneously.
The utility model is realized through following technical proposal: a kind of gas pressure automaton, comprise gas pipe, and be located at hand valve and the pressure transducer of hand valve rear side on the gas pipe; It is characterized in that the forward and backward side that is positioned at hand valve on the gas pipe is provided with the by-pass pipe of being with operation valve on it; Operation valve is electrically connected with controller, and controller also is electrically connected with pressure transducer, so that during operate as normal; Close hand valve; The coal gas by-pass pipe of flowing through is got back on the gas pipe, is that 4 ~ 20mADC current signal send the controller input end through pressure transducer with the gas pressure conversion of signals of gathering, through with controller in setup pressure value relatively after; Regulate and control the unlatching of operation valve again by the output of controller, realize the automatic control of gas pressure.
Operation valve on the said by-pass pipe is a pneumatic control valve; This pneumatic control valve is electrically connected with controller through EP transducer and lead; Wherein the work source of the gas of pneumatic control valve is the pressurized air of 300 ~ 500kPa, so that the current signal of controller output is delivered to the pressure control gas that EP transducer converts 0 ~ 300kPa into, controls the size of pneumatic control valve switch over travel; Thereby change the gas pressure size; The realization gas pressure is controlled automatically, and what realized in whole loop is negative feedback PID (ratio, integration, the differential) computing of signal, and just output valve is towards the direction action that reduces the absolute value of difference between pressure measuring value and the setting value; Up to minimum, stable, the control automatically of gas pressure have finally been realized.
Said pneumatic control valve is forward and backward respectively installs a gate valve, so that two valve standard-sized sheets during ordinary production, the hand valve complete shut-down is only accomplished the automatic adjusting of gas pressure through pneumatic control valve; During the maintenance pneumatic control valve, forward and backward gate valve complete shut-down changes by hand valve control gas pressure, thereby is guaranteeing under the situation that coal gas does not leak pneumatic control valve safety to be pulled down maintenance, and it is uninterrupted just to have protected safety in production.
Also be provided with temperature sensor, flow sensor on the said gas pipe, and be electrically connected with controller, with monitoring gas temperature and flow through lead.
Said controller is commercial conventional products.
The utlity model has advantage and effect: adopt such scheme, the gas pressure of can be easily coal gas being carried porch, hydrogen unit automatically adjusts, and to regulate pressure be to move towards the direction that reduces set-point and measured value absolute value of the bias all the time; Thereby can stablize controlled gas pressure; Thereby each equipment provides the coal gas of pressure stability in the unit, each equipment can efficiently be moved, and prolong the serviceable life of each equipment; Reduce maintenance rate; Reduce cost, effectively reduce labor strength simultaneously, guarantee final product quality.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be further described.
Like Fig. 1; The gas pressure automaton that the utility model provides; Comprise gas pipe 1, be located at manual flap valve 2 and the pressure transducer 4 of manual flap valve 2 rear sides on the gas pipe 1, the forward and backward side that on gas pipe 1, is positioned at manual flap valve 2 is provided with the by-pass pipe 11 of band operation valve 10 on it; Operation valve 10 is electrically connected with controller 6, and controller 6 also is electrically connected with pressure transducer 4; Operation valve 10 on the said by-pass pipe 11 is a pneumatic control valve; This pneumatic control valve is electrically connected with controller 6 through EP transducer 9 and lead 7; To convert automatically controlled signal into air pressure signal through controller 6, EP transducer 9; Control the size of pneumatic control valve switch over travel, thereby change the gas pressure size, the realization gas pressure is controlled automatically; Be respectively equipped with gate valve 12,8 on the by-pass pipe 11 of the forward and backward side of said pneumatic control valve,, close manual flap valve 2, accomplish the automatic adjusting of gas pressure through pneumatic control valve so that open two gate valves 12,8 during ordinary production; And maintenance is closed two gate valves 12,8 during pneumatic control valve, change by manual flap valve 2 control gas pressures, with protect produce uninterrupted; Also be provided with temperature sensor 3, flow sensor 5 on the said gas pipe 1, and be electrically connected with controller 6, with monitoring gas temperature and flow through lead; Said controller 6 is commercial conventional products.
Claims (4)
1. gas pressure automaton; Comprise gas pipe; Be located at hand valve and the pressure transducer of hand valve rear side on the gas pipe; It is characterized in that the forward and backward side that is positioned at hand valve on the gas pipe is provided with the by-pass pipe of being with operation valve on it, operation valve is electrically connected with controller, and controller also is electrically connected with pressure transducer.
2. gas pressure automaton according to claim 1 is characterized in that the operation valve on the said by-pass pipe is a pneumatic control valve, and this pneumatic control valve is electrically connected with controller through EP transducer and lead.
3. gas pressure automaton according to claim 1 is characterized in that said pneumatic control valve is forward and backward a gate valve respectively is installed.
4. gas pressure automaton according to claim 1 is characterized in that also being provided with on the said gas pipe temperature sensor, flow sensor, and is electrically connected with controller through lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201368869U CN202494937U (en) | 2012-04-01 | 2012-04-01 | Automatic control device for gas pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201368869U CN202494937U (en) | 2012-04-01 | 2012-04-01 | Automatic control device for gas pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202494937U true CN202494937U (en) | 2012-10-17 |
Family
ID=47001155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201368869U Expired - Lifetime CN202494937U (en) | 2012-04-01 | 2012-04-01 | Automatic control device for gas pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202494937U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007772A (en) * | 2013-02-25 | 2014-08-27 | 广州市兆基饮水设备科技有限公司 | Full intelligent safety pressure control system |
| CN104818051A (en) * | 2015-04-30 | 2015-08-05 | 北京神雾环境能源科技集团股份有限公司 | Automatic coal gas station load control system |
| CN106940019A (en) * | 2017-04-17 | 2017-07-11 | 东北师范大学 | Polycyclic aromatic hydrocarbon emission reduction device based on negative feedback control |
-
2012
- 2012-04-01 CN CN2012201368869U patent/CN202494937U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007772A (en) * | 2013-02-25 | 2014-08-27 | 广州市兆基饮水设备科技有限公司 | Full intelligent safety pressure control system |
| CN104818051A (en) * | 2015-04-30 | 2015-08-05 | 北京神雾环境能源科技集团股份有限公司 | Automatic coal gas station load control system |
| CN104818051B (en) * | 2015-04-30 | 2017-03-01 | 北京神雾环境能源科技集团股份有限公司 | Gas station load automatic control system |
| CN106940019A (en) * | 2017-04-17 | 2017-07-11 | 东北师范大学 | Polycyclic aromatic hydrocarbon emission reduction device based on negative feedback control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180517 Address after: 650500 A46, science and Technology Innovation Park, 3 Kai Road, Kunming, Yunnan Patentee after: Yunnan Coal & Energy Co., Ltd. Address before: 650000 Guandu District, Kunming City, Yunnan Province, Tai Banqiao Patentee before: Kunming Coking Gas Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |
|
| CX01 | Expiry of patent term |