CN202417909U - Safety protector of urea plant ammonia pump - Google Patents
Safety protector of urea plant ammonia pump Download PDFInfo
- Publication number
- CN202417909U CN202417909U CN2012200140126U CN201220014012U CN202417909U CN 202417909 U CN202417909 U CN 202417909U CN 2012200140126 U CN2012200140126 U CN 2012200140126U CN 201220014012 U CN201220014012 U CN 201220014012U CN 202417909 U CN202417909 U CN 202417909U
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- CN
- China
- Prior art keywords
- valve
- pump
- ammonia pump
- control system
- safety protector
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a safety protector of a urea plant ammonia pump, and belongs to a safety protector for protecting a large pump device when the large pump device runs under low flow rate or is at the driving stage. The safety protector of the urea plant ammonia pump comprises an electromagnetic valve, a backflow valve and a distributed control system, wherein the backflow valve and an ammonia pump are arranged in parallel; the inlet flow rate of the ammonia pump of the distributed control system is low, a locking system controls the electromagnetic valve, a No.1 opening of the electromagnetic valve is connected with a film head of the backflow valve, and a No.3 opening of the electromagnetic valve is connected with a locator; and a regulator of the distributed control system is used for transmitting a control signal to the locator, and the locator controls a switch of the backflow valve. According to the safety protector disclosed by the utility model, when the flow rate of the inlet reaches a fixed-point valve, the backflow valve is immediately and exactly opened, and the safety of a pump is protected. The safety protector also can exert human intervention on the pump at special stages such as the driving stage, so as to protect the pump against unnecessary damage to the furthest extent, meanwhile, the stability of an outlet is guaranteed, further, the stability of a following working section is guaranteed, the working time is saved, and the energy consumption and material consumption are saved.
Description
One, technical field:
The utility model relates to the protection of protection large scale computer pumping unit safe operation under low discharge and the safety protection device of start-up, what be specifically related to is the safety protection device of urea device ammonia pump.
Two, background technique:
Large-scale pump is related to the steady production of whole device, and the pump accident is in case take place, and consequence is very serious, and the lighter causes device damage, needs the long period to rush to repair, and weight person can follow major casualties, loses hugely, so the safety of large-scale pump is most important.
The large-scale ammonia pump of Daqing petrochemical company chemical fertilizer factory urea device (P104) is that the liquefied ammonia of the 2.4MPa that is responsible for synthesizer is sent here compresses pressure is brought up to 16MPa after the dense first ammonium that comes with 203-C after the ammonia heater heats is sent into hp ammonium carbamate condenser 202-C reacts; This ammonia pump (P104) is the key equipment of raw material ammonia compression, in case damage the parking that will cause whole urea device.The low interlocking of ammonia pump inlet flow rate is set for this reason, consults shown in Figure 1ly, ammonia pump and reflux valve are in parallel installed with, and are lower than 60m at the ammonia pump inlet flow rate
3Open reflux valve during/h, guarantee the safety of pump.This reflux valve is that wind closes valve; If want when inlet flow rate is low, to open reflux valve; Just require when the interlocking action, to be cut to the air feed of reflux valve film head; And simply open reflux valve with the air feed that is cut to the film head, can't satisfy the needs that can operate this valve the more medium action back technologist that in particular cases interlocks of startup procedure of technological requirement again.
Three, summary of the invention:
The purpose of the utility model provides the safety protection device of urea device ammonia pump, the problem that the technologist can not operate reflux valve when the safety protection device of this urea device ammonia pump was used to solve the low interlocking action of existing ammonia pump inlet flow rate.
The utility model solves the technological scheme that its technical problem adopted: the safety protection device of this urea device ammonia pump comprises solenoid valve, reflux valve, decentralized control system, and reflux valve and ammonia pump are in parallel installed with; The ammonia pump inlet flow rate of decentralized control system hangs down the interlock system control electromagnetic valve, and the 1# mouth of solenoid valve connects the film head of reflux valve, and the 3# mouth of solenoid valve is connected with positioning work piece; The regulator of decentralized control system is given the positioning work piece control signal, the switch of positioning work piece control reflux valve.
Beneficial effect:
1, the utility model can promptly and accurately be opened reflux valve when inlet flow rate reaches fixed-point value, protection pump safety.Can carry out human intervention at particular stages such as pump startup procedures again, protect pump to avoid unnecessary damage to greatest extent, guarantee the stable of outlet pressure simultaneously,, save on-stream time and cut down the consumption of energy and material consumption to guarantee the stable of follow-up workshop section.
2, the utility model can be protected the safety of pump effectively, prevents the generation of equipment accident, parking accident.
Four, description of drawings:
Fig. 1 is the process flow diagram of original large-scale ammonia pump;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is the process flow diagram that has adopted the large-scale ammonia pump of the utility model.
1 reflux valve, 2 solenoid valves, 3 ammonia pump inlet flow rates hang down interlock system 4 decentralized control system regulators 5 positioning work pieces.
Five, embodiment:
Below in conjunction with accompanying drawing the utility model is done further explanation:
In conjunction with Fig. 2, shown in Figure 3, the safety protection device of this urea device ammonia pump comprises solenoid valve 2, reflux valve 1, decentralized control system, and reflux valve 1 is in parallel installed with ammonia pump (P104).The ammonia pump inlet flow rate of DCS decentralized control system hangs down interlock system 3 control electromagnetic valve 2, and the 1# mouth of solenoid valve 2 connects the film head of reflux valve 1, and the 2# mouth of solenoid valve 2 is connected with air feed, and the 3# mouth of solenoid valve 2 is connected with positioning work piece 5.Hang down the interlocking signal control electromagnetic valve 2 of interlock system 3 from the ammonia pump inlet flow rate of DCS decentralized control system; Decentralized control system regulator 4 gives positioning work piece 5 control signals, the switch of positioning work piece 5 control reflux valves 1.
Signal in order to ensure give positioning work piece 5 at interlocking action post regulator can guarantee reflux valve 1 standard-sized sheet; Interlocking on the DCS decentralized control system comes into operation button when pressing; The signal setting of reflux valve 1 standard-sized sheet when script being set making interlocking come into operation in the process the interlocking action is given the output of regulator, thereby the signal that switches to positioning work piece 5 after the action of guaranteeing to interlock is reflux valve 1 a standard-sized sheet signal.
Just often artificially changed regulator output in order to prevent at interlocking simultaneously; Can't guarantee that when the interlocking action situation of on-the-spot reflux valve standard-sized sheet takes place; Through to guarantee before the interlocking action, to change the change zone control panel of output of regulator invisible in that script is set on the operating button of the regulator of DCS decentralized control system, only after the interlocking action change zone control panel that can regulate is exported appears.
Claims (1)
1. the safety protection device of a urea device ammonia pump, it is characterized in that: the safety protection device of this urea device ammonia pump comprises solenoid valve (2), reflux valve (1), decentralized control system, reflux valve (1) is in parallel installed with ammonia pump; The ammonia pump inlet flow rate of decentralized control system hangs down interlock system (3) control electromagnetic valve (2), and the 1# mouth of solenoid valve (2) connects the film head of reflux valve (1), and the 3# mouth of solenoid valve (2) is connected with positioning work piece (5); Decentralized control system regulator (4) is given positioning work piece (5) control signal, the switch of positioning work piece (5) control reflux valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200140126U CN202417909U (en) | 2012-01-01 | 2012-01-01 | Safety protector of urea plant ammonia pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200140126U CN202417909U (en) | 2012-01-01 | 2012-01-01 | Safety protector of urea plant ammonia pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417909U true CN202417909U (en) | 2012-09-05 |
Family
ID=46742680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200140126U Expired - Fee Related CN202417909U (en) | 2012-01-01 | 2012-01-01 | Safety protector of urea plant ammonia pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178654A (en) * | 2017-07-28 | 2017-09-19 | 安阳化学工业集团有限责任公司 | A kind of regulating valve realizes the device and method of double loop automatic switchover regulation |
-
2012
- 2012-01-01 CN CN2012200140126U patent/CN202417909U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178654A (en) * | 2017-07-28 | 2017-09-19 | 安阳化学工业集团有限责任公司 | A kind of regulating valve realizes the device and method of double loop automatic switchover regulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20140101 |