CN203258639U - Novel pressure releasing control system for evaporative cooling deaerator - Google Patents
Novel pressure releasing control system for evaporative cooling deaerator Download PDFInfo
- Publication number
- CN203258639U CN203258639U CN 201320151827 CN201320151827U CN203258639U CN 203258639 U CN203258639 U CN 203258639U CN 201320151827 CN201320151827 CN 201320151827 CN 201320151827 U CN201320151827 U CN 201320151827U CN 203258639 U CN203258639 U CN 203258639U
- Authority
- CN
- China
- Prior art keywords
- pressure
- oxygen
- valve
- eliminating device
- deaerator
- 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.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model provides a novel pressure releasing control system for an evaporative cooling deaerator. The novel pressure releasing control system for the evaporative cooling deaerator comprises the deaerator which is provided with a pressure transmitter, a PLC and a releasing valve, wherein the pressure transmitter and the releasing valve are respectively connected with the PLC. The pressure transmitter is used for measuring the pressure of the deaerator, two pneumatic stop valves are adopted on the releasing valve on the deaerator, and the PLC is used for controlling the two pneumatic stop valves to open and close according to the pressure measured by the pressure transmitter. The normal diameter of one pneumatic stop valve is larger than that of the other pneumatic stop valve. The novel pressure releasing control system has the advantages that due to the fact that the characters that the pneumatic stop valves are fast to be opened and closed are utilized, and releasing of the dearator pressure is controlled by the pneumatic stop valves which are different in normal diameter in a grading mode, the problem that the pressure is reduced fast and controlled unstably after the evaporative cooling deaerator is released is solved, the deoxygenization effect is improved, the time for recycling steam is increased, and the service life of an vaporization flue is prolonged.
Description
Technical field
The utility model relates to the metallurgy industry process for making, is specifically related to a kind of novel vaporization cooling oxygen-eliminating device pressure and diffuses control system.
Background technology
In converter steelmaking process, evaporated cooling system is the important step that guarantees cooling hood, also can carry out heat recovery and produce steam in convertor steelmaking process, reduces the production cost of enterprise.The life-span of evaporated flue is to one of important indicator of evaporated cooling system examination.Guarantee the life-span of evaporated flue, the oxygen content of flue recirculated cooling water must reduce, and oxygen-eliminating device is the key equipment of flue recirculated cooling water.Oxygen-eliminating device is to rely on to steam the recirculated cooling water heating, and general control oxygen-eliminating device internal pressure is controlled at 0.2MPa ~ 0.3MPa and is advisable, and water temperature in the oxygen-eliminating device is controlled at about 131 ℃.So the control of the pressure in the oxygen-eliminating device namely becomes the key point of deaerating effect quality.
With reference to shown in Figure 1, existing vaporization cooling oxygen-eliminating device pressure diffuses control system, comprises oxygen-eliminating device 1, and oxygen-eliminating device 1 is provided with pressure transmitter 2, PLC controller 3 and electronic diffusion valve 6, and described pressure transmitter 2, electronic diffusion valve 6 are connected with PLC controller 3 respectively.In the converter normal productive process, the normal operating flow process is to oxygen-eliminating device 1 moisturizing by softened water tank, it is interior with the heating of the soft water in the oxygen-eliminating device 1 to enter oxygen-eliminating device 1 by steam pipe system introducing steam, by the steam pressure in the pressure transmitter 2 control oxygen-eliminating devices 1, make water temperature reach 131 ℃, after bessemerizing the water that consumes in the drum, by oxygen-eliminating device 1 moisturizing to drum.Diffusion valve on the oxygen-eliminating device 1 is traditionally arranged to be electronic diffusion valve 6, (being generally 0.4MPa opens when the steam of being introduced by control valve 7 by steam pipe system causes oxygen-eliminating device 1 internal pressure too high, 0.3MPa close), open electronic diffusion valve 6 on the oxygen-eliminating device 1 by PLC controller 3.Since the action feature of electronic diffusion valve 6 be move slower, when opening electronic 6 initial stages of diffusion valve, oxygen-eliminating device 1 pressure drop is not obvious, after electronic diffusion valve 6 is opened fully, because the exhaust stack caliber is excessive, can cause oxygen-eliminating device 1 pressure drop too fast, oxygen-eliminating device 1 interior water temperature reduces, deaerating effect is bad, affects oxygen removal efficiency.Because the electronic diffusion valve 6 of oxygen-eliminating device leaves valve and pass valve range of set value is too small, electronic diffusion valve 6 acts frequently, and valve also damages easily, causes very large burden to production maintenance.
Summary of the invention
The technical problems to be solved in the utility model is for the problems referred to above that existing oxygen-eliminating device exists, to provide a kind of novel vaporization cooling oxygen-eliminating device pressure to diffuse control system.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to be:
Novel vaporization cooling oxygen-eliminating device pressure diffuses control system, comprise the oxygen-eliminating device body, the oxygen-eliminating device body is provided with pressure transmitter, PLC controller and diffusion valve, described pressure transmitter, diffusion valve are connected with the PLC controller respectively, pressure transmitter is used for measuring the pressure of oxygen-eliminating device, diffusion valve on the described oxygen-eliminating device body is taked two pneumatic cut-off valves, and the pressure that the PLC controller is used for recording by pressure transmitter is controlled the switch of two pneumatic cut-off valves.
In such scheme, the nominal diameter of described two pneumatic cut-off valves small one and large one.
In such scheme, also be provided with Safety relief valve on the described oxygen-eliminating device body.
Operation principle of the present utility model is, adopts small one and large one pneumatic cut-off valve grading control of two nominal diameters to diffuse oxygen-eliminating device pressure:
A) when oxygen-eliminating device pressure is higher than the first value of diffusing H1, only open the little pneumatic cut-off valve of nominal diameter and diffuse oxygen-eliminating device pressure;
B) rise when the continuation of oxygen-eliminating device pressure, behind the too much arrival of the first value of diffusing H1 the second value of diffusing H2, open simultaneously the large pneumatic cut-off valve of nominal diameter, keep two pneumatic cut-off valves whiles to diffuse rapidly oxygen-eliminating device pressure;
C) after oxygen-eliminating device pressure is lower than the first dangerous values L1, close at once the large pneumatic cut-off valve of nominal diameter;
D) after pressure continues to be reduced to the second dangerous values L2, close simultaneously the little pneumatic cut-off valve of nominal diameter;
Above-mentioned the first value of diffusing H1, the second value of diffusing H2, the first dangerous values L1, the second dangerous values L2 satisfy relational expression H2〉H1〉L1〉L2.
The utility model has following beneficial effect with respect to original electronic diffusion valve control pressurer system:
Electronic diffusion valve on the original oxygen-eliminating device is changed to small one and large one pneumatic cut-off valve of two nominal diameters, and it is faster that pneumatic cut-off valve maximum characteristics with respect to electronic diffusion valve are out that valve closes the valve corresponding speed, and it is little to open the downstream pressure time-delay that descends; Utilize pneumatic cut-off valve to drive valve and close the fast characteristics of valve events, grading control is diffused oxygen-eliminating device pressure, solve well vaporization cooling oxygen-eliminating device and diffuse the unstable problem of the too fast pressure control of rear pressure drop, keeping the oxygen-eliminating device pressure long period is in the pressure rating that can send steam outside, pressure control accurately, strengthen deaerating effect, increase simultaneously Steam Recovery time and evaporated flue life-span.
Description of drawings
Fig. 1 is that existing vaporization cooling oxygen-eliminating device pressure diffuses the structural representation of control system.
Fig. 2 is that novel vaporization cooling oxygen-eliminating device pressure of the present utility model diffuses the structural representation of control system.
Among the figure, 1-oxygen-eliminating device, 2-pressure transmitter, 3-PLC controller, 4-pneumatic cut-off valve, 41-DN100 pneumatic cut-off valve, 42-DN50 pneumatic cut-off valve, 5-Safety relief valve, the electronic diffusion valve of 6-, 7-control valve.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the technical solution of the utility model is further described in detail.
With reference to shown in Figure 2, novel vaporization cooling oxygen-eliminating device pressure described in the utility model diffuses control system, comprise oxygen-eliminating device 1, oxygen-eliminating device 1 is provided with pressure transmitter 2, PLC controller 3 and diffusion valve, described pressure transmitter 2, diffusion valve 6 are connected with PLC controller 3 respectively, pressure transmitter 2 is used for measuring the pressure of oxygen-eliminating device 1, diffusion valve on the described oxygen-eliminating device 1 is taked two pneumatic cut-off valves 4, and the pressure that PLC controller 3 is used for recording by pressure transmitter 2 is controlled the switch of two pneumatic cut-off valves 4.
The nominal diameter of described two pneumatic cut-off valves 4 small one and large one.
Also be provided with Safety relief valve 5 on the described oxygen-eliminating device 1.
The utility model oxygen-eliminating device 1 pressure is introduced by the control valve 7 of pressure transmitter 2 one sides by steam pipe system, adopt small one and large one pneumatic cut-off valve 4---DN100 pneumatic cut-off valve 41 and DN50 pneumatic cut-off valve 42 of two nominal diameters, grading control is diffused oxygen-eliminating device 1 pressure, specifically may further comprise the steps:
A) when oxygen-eliminating device 1 pressure is higher than the first value of diffusing 0.4MPa, only open the little DN50 pneumatic cut-off valve 42 of nominal diameter and diffuse oxygen-eliminating device 1 pressure, keep as far as possible the pressure in the oxygen-eliminating device 1, guarantee oxygen-eliminating device 1 deaerating effect;
B) rise when the continuation of oxygen-eliminating device 1 pressure, behind the too much arrival of the first value of diffusing 0.4MPa the second value of diffusing 0.45MPa, open simultaneously the large DN100 pneumatic cut-off valve 41 of nominal diameter, keep two pneumatic cut-off valves 4 to diffuse simultaneously oxygen-eliminating device pressure;
C) after oxygen-eliminating device 1 pressure is lower than the first dangerous values 0.35MPa, close at once the large DN100 pneumatic cut-off valve 41 of nominal diameter;
D) after oxygen-eliminating device 1 pressure continues to be reduced to the second dangerous values 0.25MPa, close simultaneously the little DN50 pneumatic cut-off valve 42 of nominal diameter.
The utility model changes to small one and large one DN100 pneumatic cut-off valve 41 and DN50 pneumatic cut-off valve 42 of two nominal diameters with the electronic diffusion valve 6 of DN150 on the original oxygen-eliminating device among Fig. 1, pneumatic cut-off valve 4 is out that with respect to electronic diffusion valve 6 maximum characteristics valve pass valve corresponding speed is faster, opens downstream pressure decline and delays time little; Utilize pneumatic cut-off valve 4 to drive valve and close the fast characteristics of valve events, grading control is diffused oxygen-eliminating device 1 pressure, solve well vaporization cooling oxygen-eliminating device and diffuse the unstable problem of the too fast pressure control of rear pressure drop, strengthen deaerating effect, increase simultaneously Steam Recovery time and evaporated flue life-span.
Above-described only is preferred embodiment of the present utility model; certainly can not limit with this interest field of the utility model; therefore adopt identical with this example or close method, or change according to the equivalence that the utility model claim is done, still belong to protection domain of the present utility model.
Claims (3)
1. novel vaporization cooling oxygen-eliminating device pressure diffuses control system, comprise oxygen-eliminating device, oxygen-eliminating device is provided with pressure transmitter, PLC controller and diffusion valve, described pressure transmitter, diffusion valve are connected with the PLC controller respectively, pressure transmitter is used for measuring the pressure of oxygen-eliminating device, it is characterized in that: the diffusion valve on the described oxygen-eliminating device is taked two pneumatic cut-off valves, and the pressure that the PLC controller is used for recording by pressure transmitter is controlled the switch of two pneumatic cut-off valves.
2. novel vaporization cooling oxygen-eliminating device pressure as claimed in claim 1 diffuses control system, it is characterized in that: the nominal diameter of described two pneumatic cut-off valves small one and large one.
3. novel vaporization cooling oxygen-eliminating device pressure as claimed in claim 1 diffuses control system, it is characterized in that: also be provided with Safety relief valve on the described oxygen-eliminating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320151827 CN203258639U (en) | 2013-03-29 | 2013-03-29 | Novel pressure releasing control system for evaporative cooling deaerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320151827 CN203258639U (en) | 2013-03-29 | 2013-03-29 | Novel pressure releasing control system for evaporative cooling deaerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203258639U true CN203258639U (en) | 2013-10-30 |
Family
ID=49471199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320151827 Withdrawn - After Issue CN203258639U (en) | 2013-03-29 | 2013-03-29 | Novel pressure releasing control system for evaporative cooling deaerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203258639U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216819A (en) * | 2013-03-29 | 2013-07-24 | 中冶南方工程技术有限公司 | Method and system for controlling pressure release of novel evaporative cooling deaerator |
-
2013
- 2013-03-29 CN CN 201320151827 patent/CN203258639U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216819A (en) * | 2013-03-29 | 2013-07-24 | 中冶南方工程技术有限公司 | Method and system for controlling pressure release of novel evaporative cooling deaerator |
| CN103216819B (en) * | 2013-03-29 | 2015-09-02 | 中冶南方工程技术有限公司 | Vaporizing cooling oxygen-eliminating device pressure diffuses control method and system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX2010003518A (en) | Method for drying a compressed gas. | |
| CN104075584B (en) | A kind of waste heat of flue gas of heating furnace recovered temperature controls System and method for | |
| CN104232846B (en) | A kind of system and method to RH refining furnace steam supply | |
| CN203258639U (en) | Novel pressure releasing control system for evaporative cooling deaerator | |
| CN103194570B (en) | Novel evaporative cooling drum pressure release control method and system | |
| CN107385138A (en) | A kind of method for improving coal gas of converter pipe network system and protecting energy supply power | |
| CN103104811A (en) | Pressure-regulating air-feeding method of natural gas pipeline network | |
| CN104232823B (en) | Hotblast stove level pressure changes stove control method | |
| CN107629807B (en) | Circulating ammonia water pipeline and method for replacing circulating ammonia water valve of coke oven without stopping production | |
| CN201554505U (en) | Starting control device for blast furnace pubic type residual pressure energy reclamation | |
| CN105567902A (en) | Regulating device and method for gas chamber bypass pipe network | |
| CN103216819B (en) | Vaporizing cooling oxygen-eliminating device pressure diffuses control method and system thereof | |
| CN202432012U (en) | Fast and anti-interference pilot valve | |
| CN202719177U (en) | Double-blocking and double-bleeding ball valve | |
| CN108994312B (en) | Boat pushing reduction furnace device and gas supply method | |
| CN204369822U (en) | A kind of energy saver of fixed bed coal gas producer steam | |
| CN203373388U (en) | Reliable low-risk RH (Relative Humidity) nitrogen-argon switching system | |
| CN104909342B (en) | System for guaranteeing normal shut-down sulfur blow in sulfur recovery process | |
| CN105367409B (en) | A kind of method of recovery of acetic acid device byproduct steam | |
| CN203200296U (en) | Novel evaporation cooling steam pocket pressure blow-off control system | |
| CN204852930U (en) | Degrease production line gas supply system's automatic control device | |
| CN205782823U (en) | Gas fired-boiler automatic nitrogen-charging protection system | |
| CN201809378U (en) | Gas recovering and switching valve station | |
| CN204490923U (en) | Converter trunnion ring water coolant supply line arrangement | |
| CN210624172U (en) | Heating furnace gas pipe network system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20150902 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20150902 |
|
| RGAV | Abandon patent right to avoid regrant |