CN202141351U - Flow blocking control system of condenser in circulating water afterheat recovery system - Google Patents
Flow blocking control system of condenser in circulating water afterheat recovery system Download PDFInfo
- Publication number
- CN202141351U CN202141351U CN201120161029U CN201120161029U CN202141351U CN 202141351 U CN202141351 U CN 202141351U CN 201120161029 U CN201120161029 U CN 201120161029U CN 201120161029 U CN201120161029 U CN 201120161029U CN 202141351 U CN202141351 U CN 202141351U
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- Prior art keywords
- condenser
- block valve
- pressure
- control system
- signal
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Abstract
The utility model discloses a flow blocking control system of a condenser in a circulating water afterheat recovery system. The flow blocking control system comprises a pressure transmitter, a DCS system, the condenser, a block valve, an auxiliary pipe and signal cables, wherein the DCS system is connected with the pressure transmitter and the block valve through the signal cables respectively; the pressure transmitter is used for detecting the pressure signal of circulating water at an inlet of the condenser and transmitting the pressure signal to the DCS system; the DCS system comprises an algorithm device which is used for computing pressure rise rate dp/dt according to the pressure signal, a comparison module which is used for comparing the pressure rise rate with a preset threshold, a command generation device which is used for generating a block valve starting command as well as an I/O (Input/Output) interface which is used for receiving the pressure signal from the pressure transmitter and sending the block valve starting command to the block valve. By means of the flow blocking control system, the flow blocking condition of the circulating water can be timely and correctly judged, the block valve can be automatically opened when a circulating water loop of the condenser is not completely blocked, the vacuum of a turbine is decreased, and the safety of a steam turbine generator unit is ensured.
Description
Technical field
The utility model is about the residual heat of electric power plant recovery technology, particularly about recirculated water Heat Treatment technology, is to block the control system about condenser fluid stopping in a kind of recirculated water residual neat recovering system concretely.
Background technology
Fig. 1 is the recirculated water residual neat recovering system sketch map of prior art.The recirculated water of steam turbine 101 is installed block valve 107 through the pipeline that condenser 105 leads to cooling tower, before block valve 107, recirculated water is incorporated into absorption heat pump 102 through booster 106 and reclaims its waste heat.If recirculated water residual neat recovering system fault will cause the recirculated water fluid stopping blocked state of condenser 105, can't cool off exhaust steam in steam turbine, will cause steam turbine vacuum sharply to descend, in 2 minutes, just cause unit tripping to shut down.
Therefore, control condenser recirculated water fluid stopping obstruction has become the task of top priority.
The utility model content
The utility model provides condenser fluid stopping obstruction control system in a kind of recirculated water residual neat recovering system, to judge recirculated water fluid stopping congestion situations, opens block valve automatically.
To achieve these goals, the utility model provides condenser fluid stopping obstruction control system in a kind of recirculated water residual neat recovering system, and this system comprises: pressure transmitter, DCS system, condenser, block valve, auxiliary piping and signal cable; Wherein,
Described DCS system connects described pressure transmitter and block valve respectively through signal cable;
Said pressure transmitter is used to detect the pressure signal of condenser porch recirculated water, and described pressure signal is sent to the DCS system;
Described DCS system comprises:
Algorithm device is used for carrying out differential calculation rate of pressure rise dp/dt according to described pressure signal;
Comparison module compares described rate of pressure rise and preset threshold value;
Command generating device is used to generate the block valve open command;
The I/O interface is used for receiving described pressure signal from described pressure transmitter, and sends described block valve open command to described block valve.
Further, preset said threshold value is 0.03MPa.
The beneficial effect of the utility model embodiment is; The utility model can be promptly and accurately judgement recirculated water fluid stopping congestion situations; Automatically do not open block valve at the condenser circulating water loop when fluid stopping is blocked fully, guarantee that steam turbine vacuum does not descend, ensured the safety of Turbo-generator Set.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.In the accompanying drawings:
Fig. 1 is the recirculated water residual neat recovering system sketch map of prior art;
Fig. 2 is the structural representation that the control system is blocked in the condenser fluid stopping in the utility model embodiment recirculated water residual neat recovering system;
Fig. 3 is the detailed structure view that the control system is blocked in the condenser fluid stopping in the utility model embodiment recirculated water residual neat recovering system;
Fig. 4 is that the control method flow chart is blocked in the condenser fluid stopping in the utility model embodiment recirculated water residual neat recovering system.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment is clearer, the utility model embodiment is explained further details below in conjunction with accompanying drawing.At this, illustrative examples of the utility model and explanation thereof are used to explain the utility model, but not as the qualification to the utility model.
As shown in Figure 2, the utility model provides condenser fluid stopping obstruction control system in a kind of recirculated water residual neat recovering system, and this system comprises: pressure transmitter 201, DCS system 202, condenser 203, block valve 204, auxiliary piping and signal cable.In Fig. 2, pressure transmitter 201 is installed in the porch of condenser 203, and condenser 203 is connected with absorption heat pump group 206 with booster 205 through auxiliary piping, and electric power plant circulating water pump 207 passes through auxiliary piping to condenser 203 delivery cycle water.Said block valve 204 is installed in condenser and leads on the pipeline of cooling tower, makes the recirculated water through condenser 203 get into booster 205.
Signal cable is used to realize that described DCS system 202 is connected with the signal of described pressure transmitter 201 and block valve 204, and DCS system 202 connects described pressure transmitter 201 and block valve 204 respectively through signal cable; Said pressure transmitter 201 is used to detect the pressure signal of condenser porch recirculated water, and described pressure signal is sent to DCS system 202.
When the recirculated water residual neat recovering system normally moved, condenser recirculated water flowed unimpeded, and the condenser inlet pressure is stabilized in P
0About=0.15MPa; When recirculated water residual neat recovering system equipment fault (booster tripping operation, backwater valve close etc.) causes waste heat systemic circulation water fluid stopping blocked state; The condenser inlet pressure can raise under the effect of electric power plant circulating water pump discharge pressure immediately; When condenser inlet pressure rising speed dp/dt surpasses preset threshold value, can be judged to be the recirculated water fluid stopping and block, send ON cycle water and lead to the block valve 204 on the cooling tower pipeline; With the conducting of condenser recirculated water, row is to cooling tower.
Fig. 3 is the detailed structure view that the control system is blocked in the condenser fluid stopping in the utility model embodiment recirculated water residual neat recovering system, and as shown in Figure 3, DCS system 202 comprises: algorithm device 301, comparison module 302 and command generating device 303 and I/O interface 304.
Comparison module 302 compares described rate of pressure rise dp/dt and preset threshold value.Preferably, preset threshold value is 0.03MPa.Comparison module 302 judges that whether described rate of pressure rise dp/dt is greater than preset threshold value 0.03MPa; If rate of pressure rise dp/dt is greater than threshold value 0.03MPa; Continue to judge 1 second internal pressure rising speed dp/dt all greater than threshold value, then the transient fluctuation of non-pressure condenser recirculated water fluid stopping choking phenomenon appears and in explanation.At this moment; Command generating device 303 will generate the block valve open command, and the block valve open command is sent described block valve open command through I/O interface 304 to described block valve 204, opens described block valve 204; With the conducting of condenser recirculated water, row is to cooling tower.
As shown in Figure 4, the utility model provides condenser fluid stopping obstruction control method in a kind of recirculated water residual neat recovering system, and this method comprises:
Step S401: obtain the pressure signal of condenser porch recirculated water in real time, and said pressure signal is sent to the DCS system;
Step S402:DCS system is according to said pressure signal calculating pressure rising speed dp/dt;
Step S403:DCS system judges that whether described rate of pressure rise is greater than preset threshold value;
Step S404: if generate the block valve open command, and send described block valve open command, to open described block valve 204 to block valve.
In conjunction with Fig. 2 and Fig. 3, pressure transmitter 201 detects the pressure signal of condenser porch recirculated water in real time, and the pressure signal that obtains is sent to DCS system 202.The algorithm device 301 of DCS system 202 is according to described pressure signal, through pressure signal being carried out differential calculation, calculating pressure rising speed dp/dt.
The comparison module 302 of DCS system 202 compares described rate of pressure rise dp/dt and preset threshold value.Preferably, preset threshold value is 0.03MPa.Comparison module 302 judges that whether described rate of pressure rise dp/dt is greater than preset threshold value 0.03MPa; If rate of pressure rise dp/dt is greater than threshold value 0.03MPa; Continue to judge 1 second internal pressure rising speed dp/dt all greater than threshold value, then the transient fluctuation of non-pressure condenser recirculated water fluid stopping choking phenomenon appears and in explanation.At this moment; Command generating device 303 will generate the block valve open command, and the block valve open command is sent described block valve open command through I/O interface 304 to described block valve 204, opens described block valve 204; With the conducting of condenser recirculated water, row is to cooling tower.
The beneficial effect of the utility model embodiment is; The differential signal (speed) that the utility model raises with pressure; Judgement recirculated water fluid stopping congestion situations that can be promptly and accurately; Automatically do not open block valve at the condenser circulating water loop when fluid stopping is blocked fully, guarantee that steam turbine vacuum does not descend, ensured the safety of Turbo-generator Set.
Above-described specific embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the specific embodiment of the utility model; And be not used in the protection domain that limits the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (3)
1. the control system is blocked in the condenser fluid stopping in the recirculated water residual neat recovering system, it is characterized in that described system comprises: pressure transmitter, DCS system, condenser, block valve and auxiliary piping; Wherein,
Described DCS system connects described pressure transmitter and block valve respectively;
Said pressure transmitter is used to detect the pressure signal of condenser porch recirculated water, and described pressure signal is sent to the DCS system;
Described DCS system comprises:
Algorithm device is used for according to described pressure signal calculating pressure rising speed dp/dt;
Comparison module compares described rate of pressure rise and preset threshold value;
Command generating device is used to generate the block valve open command;
The I/O interface is used for receiving described pressure signal from described pressure transmitter, and sends described block valve open command to described block valve.
2. the control system is blocked in condenser fluid stopping as claimed in claim 1, it is characterized in that, said block valve is installed in condenser and leads on the pipeline of cooling tower, makes the recirculated water through condenser get into booster.
3. the control system is blocked in condenser fluid stopping as claimed in claim 1, it is characterized in that, described condenser fluid stopping is blocked the control system and also comprised:
Signal cable is used to realize that described DCS system is connected with the signal of described pressure transmitter and block valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120161029U CN202141351U (en) | 2011-05-19 | 2011-05-19 | Flow blocking control system of condenser in circulating water afterheat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120161029U CN202141351U (en) | 2011-05-19 | 2011-05-19 | Flow blocking control system of condenser in circulating water afterheat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202141351U true CN202141351U (en) | 2012-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120161029U Expired - Lifetime CN202141351U (en) | 2011-05-19 | 2011-05-19 | Flow blocking control system of condenser in circulating water afterheat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202141351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207356A (en) * | 2011-05-19 | 2011-10-05 | 北京创时能源有限公司 | Method and system for controlling stagnation and blockage of condenser in circulating water waste heat recovery system |
-
2011
- 2011-05-19 CN CN201120161029U patent/CN202141351U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207356A (en) * | 2011-05-19 | 2011-10-05 | 北京创时能源有限公司 | Method and system for controlling stagnation and blockage of condenser in circulating water waste heat recovery system |
| CN102207356B (en) * | 2011-05-19 | 2013-07-17 | 北京创时能源有限公司 | Method and system for controlling stagnation and blockage of condenser in circulating water waste heat recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120208 Effective date of abandoning: 20130717 |
|
| RGAV | Abandon patent right to avoid regrant |