CN202082905U - System for controlling pressure of steam drum of waste heat boiler - Google Patents
System for controlling pressure of steam drum of waste heat boiler Download PDFInfo
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- CN202082905U CN202082905U CN2010206918936U CN201020691893U CN202082905U CN 202082905 U CN202082905 U CN 202082905U CN 2010206918936 U CN2010206918936 U CN 2010206918936U CN 201020691893 U CN201020691893 U CN 201020691893U CN 202082905 U CN202082905 U CN 202082905U
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- waste heat
- heat boiler
- pressure
- steam
- boiler drum
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Abstract
The utility model provides a system for controlling the pressure of a steam drum of a waste heat boiler, which comprises a waste heat boiler including a waste heat boiler steam drum, a temperature measuring element, a controller, and a steam pressure adjusting valve, wherein the temperature measuring element is used for detecting the flue gas temperature of a flue duct connected with the waste heat boiler; the controller is connected with the temperature measuring element and used for judging whether the flue gas temperature varies and controlling the adjustment of the steam pressure adjusting valve based on the judged results; and the steam pressure adjusting valve is connected between the controller and the waste heat boiler steam drum, and used for controlling the pressure of the waste heat boiler steam drum through adjusting the opening degree of the steam pressure adjusting valve. The influences to the pressure of the waste heat boiler steam drum caused by various factors in practical production process are taken into consideration, and the steam pressure adjusting valve is adjusted in advance based on the judgment on whether the flue gas temperature of the flue duct connected with the heat recovery boiler varies or not, so as to keep the stability of the pressure of the waste heat boiler steam drum.
Description
Technical field
The utility model relates to metallurgical manufacturing and design field, particularly a kind of system that controls the waste heat boiler drum pressure.
Background technology
Smelt in the technical process of producing metal at smelting furnace, main production equipment has smelting furnace, waste heat boiler etc.Smelting furnace can produce a large amount of high-temperature flue gas in fusion process, the main effect of waste heat boiler is that flue gas is lowered the temperature, and the heat with exchange is used to produce steam for other production processes uses simultaneously.Because waste heat boiler is positioned at the smelting furnace exhanst gas outlet, in case have an accident, will influence the production of smelting furnace, thereby cause heavy economic losses.Therefore, in whole smelting process, the control of waste heat boiler is most important.
Waste heat boiler is input more than, exports and complication system that every control parameter intercouples more, and steam water-level is the very important controlled variable of afterheat boiler system.If water level is low excessively, gently then influence moisture balance, the heavy waste heat boiler that then dryouies, can cause accidents such as waste heat boiler blast when serious.If water level is too high, cause steam zone liquid phenomenon easily, not only reduce the output and the quality of steam, but also can make the superheater fouling, the turbine blade that perhaps is used in steam-electric power damages.And the variation of steam water-level is relevant with the variation of drum pressure usually, and therefore in process of production, it is very important that drum pressure is controlled in certain scope.
The control method of existing waste heat boiler drum pressure is: detect the waste heat boiler drum pressure, according to the variation steam regulation pressure-regulating valve of waste heat boiler drum pressure with fine setting waste heat boiler drum pressure.
The problem that prior art exists is, do not consider that various factors in the actual production process to the influence of waste heat boiler drum pressure, can't in time regulate the waste heat boiler drum pressure to keep the stable of waste heat boiler drum pressure.
The utility model content
The purpose of this utility model is intended to solve at least the technological deficiency that can't in time regulate the waste heat boiler drum pressure.
For achieving the above object, the utility model proposes a kind of system that controls the waste heat boiler drum pressure, comprising: the waste heat boiler that comprises the waste heat boiler drum; The temperature element of the flue-gas temperature of the flue that detection links to each other with described waste heat boiler; Controller, described controller links to each other with described temperature element, judges whether described flue-gas temperature changes and according to the adjusting of described judged result control steam pressure valve; Described steam pressure control valve, described steam pressure control valve are connected between described controller and the described waste heat boiler drum, and the aperture by the steam regulation pressure-regulating valve is to control the pressure of described waste heat boiler drum.
As an embodiment of the present utility model, this system also comprises: detect the pressure transmitter of waste heat boiler drum pressure, described pressure transmitter links to each other with described controller; And the steam evacuation valve, described steam evacuation valve is connected between described controller and the described waste heat boiler drum.Described controller is judged the situation of change of the waste heat boiler drum pressure that described pressure transmitter detects, and control described steam evacuation valve, and control described steam pressure control valve according to described waste heat boiler drum pressure and regulate according to the situation of change and the described waste heat boiler drum pressure of described waste heat boiler drum pressure.
The utility model has considered that various factors is to the influence of waste heat boiler drum pressure in the actual production process, whether change to shift to an earlier date the steam regulation pressure-regulating valve by the flue-gas temperature of judging the flue that links to each other with waste heat boiler, thereby kept the stable of waste heat boiler drum pressure, simultaneously by control steam evacuation valve so that the acute variation of waste heat boiler drum pressure is made quick response, thereby avoided dangerous generation.
Aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structural representation of system of the control waste heat boiler drum pressure of the utility model embodiment; And
Fig. 2 is the flow chart of method of the control waste heat boiler drum pressure of the utility model embodiment.
The specific embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the utility model, and can not be interpreted as restriction of the present utility model.
Be illustrated in figure 1 as the structural representation of system of the control waste heat boiler drum pressure of the utility model embodiment, this system comprises: the waste heat boiler 1, temperature element 2, controller 3 and the steam pressure control valve 4 that comprise waste heat boiler drum 10.Temperature element 2 detects the flue-gas temperature of the flue 7 that links to each other with waste heat boiler 1.Controller 3 links to each other with steam pressure control valve 4 with temperature element 2, receives temperature element 2 detected flue-gas temperatures, judges whether flue-gas temperature changes, and controls the adjusting of steam pressure control valve 4 according to judged result.Steam pressure control valve 4 is connected between controller 3 and the waste heat boiler drum 10, and the aperture by steam regulation pressure-regulating valve 4 is with the pressure of control waste heat boiler drum 1.
In an embodiment of the present utility model, controller 3 comprises temperature judge module 31 and control module 32.Temperature judge module 31 is used to judge whether the flue-gas temperature that temperature element 2 detects changes.Control module 32 is according to the adjusting of the judged result control steam pressure control valve 4 of temperature judge module 31.Particularly, if temperature judge module 31 judges that flue-gas temperature raises, then the aperture of control module 32 control steam pressure control valves 4 increases; If temperature judge module 31 judges that flue-gas temperature descends, then the aperture of control module 32 control steam pressure control valves 4 reduces.
Can control the pressure of waste heat boiler drum 10 by the aperture of steam regulation pressure-regulating valve 4, but when the situation that makes system's generation danger because of waste heat boiler drum pressure acute variation takes place in the production process, can't change the waste heat boiler drum pressure fast in time by steam regulation pressure-regulating valve 4, cause significant damage easily.Therefore, in an embodiment of the present utility model, this system also can comprise pressure transmitter 5 and steam evacuation valve 6.Pressure transmitter 5 links to each other with controller 3, and steam evacuation valve 6 is connected between controller 3 and the waste heat boiler drum 10.Pressure transmitter 5 detects the pressure of waste heat boiler drum 10, and detected force value sent to controller 3, controller 3 is judged the situation of change of waste heat boiler drum pressure, and controls steam evacuation valve 6 according to the situation of change and the waste heat boiler drum pressure of waste heat boiler drum pressure.Simultaneously, controller 3 also can be regulated to adjust the minor variations that the waste heat boiler drum pressure takes place in the melting production process according to waste heat boiler drum pressure control steam pressure control valve 4.
In a specific embodiment of the present utility model, controller 3 comprises that also parameter is provided with module 33 and pressure judge module 34.Parameter is provided with first alarming value and second alarming value that module 31 is used to be provided with the waste heat boiler drum pressure, and wherein, second alarming value should be understood that the situation according to actual production greater than first alarming value, can set the first different alarming values and second alarming value.Pressure judge module 34 is used to judge the situation of change of pressure transmitter 5 detected waste heat boiler drum pressures and the waste heat boiler drum pressure magnitude relationship with respect to first alarming value and second alarming value.Control module 32 is according to the judged result control steam evacuation valve 6 of pressure judge module 34.
Particularly, if pressure judge module 34 judge the waste heat boiler drum pressures increase gradually and detected waste heat boiler drum pressure value greater than second alarming value, then control module 32 control steam evacuation valves 6 are opened fully; If pressure judge module 34 judge the waste heat boiler drum pressures reduce gradually and detected waste heat boiler drum pressure value less than first alarming value, then control module 32 control steam evacuation valves 6 cut out fully.
Should be understood that the foregoing description only is exemplary embodiment, in addition, also can or manually control steam evacuation valve 6 by PID adjuster control steam evacuation valve 6, these modifications or variation all should be included in of the present utility model comprising in the scope.
According to specific embodiment of the utility model, parameter is provided with the pressure stability value that module 33 also can be used for being provided with waste heat boiler drum 10, should be understood that the situation according to actual production, can set different pressure stability values.Pressure judge module 34 judges whether pressure transmitter 5 detected waste heat boiler drum pressures depart from the pressure stability value.Control module 32 is regulated according to the judged result control steam pressure control valve 4 of pressure judge module 34.Particularly, if pressure judge module 34 is judged the waste heat boiler drum pressure greater than the pressure stability value, then the aperture of control module 32 control steam pressure control valves 4 increases; If pressure judge module 34 is judged the waste heat boiler drum pressure less than the pressure stability value, then the aperture of control module 32 control steam pressure control valves 4 reduces.
Be illustrated in figure 2 as the flow chart of method of the control waste heat boiler drum pressure of the utility model embodiment, in conjunction with above-mentioned system embodiment, this method may further comprise the steps:
Step S101, temperature element 2 detects the flue-gas temperature of the flue 7 that links to each other with waste heat boiler 1.
Step S102, controller 3 receives temperature element 2 detected flue-gas temperatures, judges whether flue-gas temperature changes.
Step S103, if controller 3 judges that the flue-gas temperature of flue 7 changes, then controller 3 control steam pressure control valves 4 are regulated the pressure with control waste heat boiler drum 1.
For example, when melting began, the mixed copper concentrate entered in the stove, oxygen-enriched air and fuel oil blast the molten bath by spray gun, combustion rate increases suddenly, and flue-gas temperature sharply rises, but because flue gas arrives waste heat boiler from uptake flue one section delay time is arranged, therefore, after a period of time, the pressure of waste heat boiler drum just can rise, and should understand, according to the difference of the condition of production, the pressure different amount that can rise.According to the method for the utility model embodiment, the steam pressure control valve opening is increased, when pressure rises gradually, only need fine setting steam pressure control valve can stablize drum pressure, and then stable steam water-level.
Similarly, when melting stopped, oxygen system cut off, and blanking stops, and combustion rate die-offs, and flue-gas temperature sharply descends.Also be that therefore, after a period of time, the pressure of waste heat boiler drum just can descend, and should be understood that the difference according to the condition of production because boiler temperature descends one section delay time is arranged, the pressure different amount that can descend.According to the method for the utility model embodiment, the steam pressure control valve opening is reduced, when pressure descends gradually, only need fine setting steam pressure control valve can stablize drum pressure, thereby stablize steam water-level.
In order to prevent to take place in the production process to produce dangerous because of the waste heat boiler drum pressure acute variation system that makes, system in conjunction with above-mentioned the utility model embodiment, utilize pressure transmitter 5 to detect the pressure of waste heat boiler drum 10, detected waste heat boiler drum pressure is sent to controller 3, controller 3 is according to situation of change control steam evacuation valve 6 pressure with control waste heat boiler drum 10 of waste heat boiler drum pressure and waste heat boiler drum pressure, and controller 3 also can be regulated to adjust the minor variations that the waste heat boiler drum pressure takes place in the melting production process according to waste heat boiler drum pressure control steam pressure control valve 4 simultaneously.
Particularly, at first set first alarming value and second alarming value of waste heat boiler drum pressure, wherein, second alarming value should be understood that the situation according to actual production greater than first alarming value, can set the first different alarming values and second alarming value.Then, controller 3 judges that detected waste heat boiler drum pressure is to increase gradually or reducing gradually.Increasing gradually, whether then judge the waste heat boiler drum pressure if judge detected waste heat boiler drum pressure, greater than second alarming value, then open steam evacuation valve 6 fully if judge detected waste heat boiler drum pressure greater than second alarming value; Reducing gradually if judge detected waste heat boiler drum pressure, whether then judging the waste heat boiler drum pressure less than first alarming value, if judge detected waste heat boiler drum pressure less than second alarming value, then complete steam off atmospheric valve 6.
In addition, also can set the stationary value of waste heat boiler drum pressure, should be understood that situation, can set different pressure stability values according to actual production.Then, controller 3 judges whether pressure transmitter 5 detected waste heat boiler drum pressures depart from the pressure stability value.If judge the waste heat boiler drum pressure greater than the pressure stability value, the aperture of then controlling steam pressure control valve 4 increases; If judge the waste heat boiler drum pressure less than the pressure stability value, the aperture of then controlling steam pressure control valve 4 reduces.
Whether the utility model changes to shift to an earlier date the steam regulation pressure-regulating valve by the flue-gas temperature of judging the flue that links to each other with waste heat boiler, thereby kept the stable of waste heat boiler drum pressure, simultaneously by control steam evacuation valve so that the acute variation of waste heat boiler drum pressure is made quick response, thereby avoided dangerous generation.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present utility model is by claims and be equal to and limit to these embodiment.
Claims (3)
1. a system that controls the waste heat boiler drum pressure is characterized in that, comprising:
The waste heat boiler that comprises the waste heat boiler drum;
The temperature element of the flue-gas temperature of the flue that detection links to each other with described waste heat boiler;
The steam pressure control valve, described steam pressure control valve is connected with described waste heat boiler drum, and the aperture by the steam regulation pressure-regulating valve is to control the pressure of described waste heat boiler drum; And
Controller, described controller are connected between described temperature element and the described steam pressure control valve and regulate with the aperture of controlling described steam pressure control valve according to described flue-gas temperature.
2. the system of control waste heat boiler drum pressure according to claim 1 is characterized in that, also comprises:
Detect the pressure transmitter of waste heat boiler drum pressure, described pressure transmitter links to each other with described controller; And
Control the steam evacuation valve of described waste heat boiler drum pressure, described steam evacuation valve is connected between described controller and the described waste heat boiler drum so that described controller is controlled described steam evacuation valve according to the detected waste heat boiler drum pressure of described pressure transmitter.
3. the system of control waste heat boiler drum pressure according to claim 2 is characterized in that, also comprises the PID adjuster, and described PID adjuster is connected between described steam evacuation valve and the described pressure transmitter to control described steam evacuation valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206918936U CN202082905U (en) | 2010-12-30 | 2010-12-30 | System for controlling pressure of steam drum of waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206918936U CN202082905U (en) | 2010-12-30 | 2010-12-30 | System for controlling pressure of steam drum of waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202082905U true CN202082905U (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206918936U Expired - Fee Related CN202082905U (en) | 2010-12-30 | 2010-12-30 | System for controlling pressure of steam drum of waste heat boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN202082905U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194570A (en) * | 2013-03-29 | 2013-07-10 | 中冶南方工程技术有限公司 | Novel evaporative cooling drum pressure release control method and system |
| CN104154522A (en) * | 2014-06-19 | 2014-11-19 | 国家电网公司 | Method for evaluating running state of blast leakage process of heated pipe of boiler |
-
2010
- 2010-12-30 CN CN2010206918936U patent/CN202082905U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194570A (en) * | 2013-03-29 | 2013-07-10 | 中冶南方工程技术有限公司 | Novel evaporative cooling drum pressure release control method and system |
| CN103194570B (en) * | 2013-03-29 | 2015-05-20 | 中冶南方工程技术有限公司 | Novel evaporative cooling drum pressure release control method and system |
| CN104154522A (en) * | 2014-06-19 | 2014-11-19 | 国家电网公司 | Method for evaluating running state of blast leakage process of heated pipe of boiler |
| CN104154522B (en) * | 2014-06-19 | 2015-11-18 | 国家电网公司 | Boiler heat pipe is quick-fried leaks through journey running status appraisal procedure |
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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: 20111221 Termination date: 20121230 |