CN205227276U - Spectrum formula boiler anti -coking system - Google Patents
Spectrum formula boiler anti -coking system Download PDFInfo
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- CN205227276U CN205227276U CN201521055437.1U CN201521055437U CN205227276U CN 205227276 U CN205227276 U CN 205227276U CN 201521055437 U CN201521055437 U CN 201521055437U CN 205227276 U CN205227276 U CN 205227276U
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- temperature
- spectrum
- measuring device
- control system
- coking
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Abstract
The utility model discloses a spectrum formula boiler anti -coking system, including the spectrum temperature measuring device of a plurality of equipartitions on the furnace same cross -section in high -temperature region, with the control system that connects of spectrum temperature measuring device communication, the spectrum temperature measuring device lateral wall that includes accessible furnace perforate to the thermoscope of furnace temperature temperature measurement and right the thermoscope refrigerated cold source air carries out. The utility model discloses just from the root of coking, through the control to the temperature to and the detection of combination emission, promptly, DCS collects each side's information, through regression analysis algorithm, the neural network algorithm with the matlab the inside, realizes foreseeing reporting to the police and calculates, directly adopts current system, has simplified the system layout, the whole control of realization of being convenient for moreover, and the data acquisition of furnace high -temperature region has played the key effect especially.
Description
Technical field
The utility model relates to boiler thermometry field, particularly relates to a kind of spectrum-type boiler anti-coking system.
Background technology
Boiler coke refers to the phenomenon be bonded in after lime-ash at high temperature melts on furnace wall, heating surface.In burner hearth, combustion flame central temperature is between 1500 ~ 1700 DEG C.Ash content in fuel is mostly molten into liquid state under such high temperatures or is soft state.Due to the heat absorption of water-cooling wall, outside from flame kernel, more lower close to water-cooling wall temperature.Under normal circumstances, along with the reduction of temperature, ash content will become soft state from liquid state and become solid-state further.If ash content also maintains soft state when encountering the heating surface of water-cooling wall, will be bonded in owing to cooling on heating surface, form coking.
During burner hearth large-area coking, burner hearth can be made to recept the caloric and greatly reduce, flue gas temperature of hearth outlet is higher, makes superheater heat transfer deterioration, causes Higher temperature of Overheated Steam, superheater tube wall temperature overtemperature.After burner hearth produces local coking, coking position water-cooling wall caloric receptivity is reduced, and rate of circulating flow declines, and circulatory stasis can be caused time serious to cause Waterwall tube failure.
Boiler coke is a very complicated physical and chemical process, and it relates to burning of coal, furnace heat transfer, mass transfer, the potential ash deposition propensity of coal, coal ash particle move in stove and the complex process such as adhesion between coal ash and tube wall.Traditional overtemperature anticipation mainly relies on operating personnel to observe the change of water-cooling wall wall temperature measurement point, and water-cooling wall wall temperature measurement point is placed in outside burner hearth, there is certain hysteresis quality, thermotonus is sensitive not, and when operating personnel find, actual capabilities have caused certain coking, and, different atures of coal, its coking temperature is also not quite similar, and can not realize reliable and stable coking monitoring.
Utility model content
The purpose of this utility model is the technological deficiency for existing in prior art, and provides a kind of spectrum-type boiler anti-coking system.
The technical scheme adopted for realizing the purpose of this utility model is:
A kind of spectrum-type boiler anti-coking system, comprise multiple spectrum temperature measuring device be distributed on same cross section, burner hearth high-temperature region, the control system be connected with described spectrum temperature measuring device communication, described spectrum temperature measuring device comprises sidewall perforation by burner hearth to the temperature measurer of fire box temperature thermometric and the low-temperature receiver air that cools described temperature measurer.
Comprise four and be distributed on the spectrum temperature measuring device that cross section is burner hearth four angles place of rectangle.
Described control system comprises the Distributed Control System with described spectrum temperature measuring device electrical ties, the central control system be connected with described Distributed Control System communication, and the water-cooling wall overtemperature pre-alarming device be connected with described central control system communication.
Distributed Control System receives and gathers the fire box temperature information of spectrum temperature measuring device sensing, and central control system calls this fire box temperature information, SiO
2, Al
2o
3, CaO and MgO emission and reducibility gas content information, calculate to realize prediction and alarm by calculating with the algorithm with regress analysis method inside matlab, neural network algorithm.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is just from the root of coking, by the monitoring to temperature, and in conjunction with the detection of emission, namely, DCS collects each side's information, by with the algorithm with regress analysis method inside matlab, neural network algorithm, realize prediction and alarm and calculate, directly adopt existing system, simplify system layout, and be convenient to realize integral monitoring, and the data acquisition of burner hearth high-temperature region, serve key effect especially.
Accompanying drawing explanation
Figure 1 shows that the structural representation of spectrum-type boiler anti-coking system of the present utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, spectrum-type boiler anti-coking system of the present utility model comprises multiple spectrum temperature measuring device 2 be distributed on the same cross section, high-temperature region of burner hearth 1, the control system be connected with described spectrum temperature measuring device communication, described spectrum temperature measuring device comprises sidewall perforation by burner hearth to the temperature measurer of fire box temperature thermometric and the low-temperature receiver air pipe line 3 that cools described temperature measurer.
Wherein, preferably, comprise four and be distributed on the described spectrum temperature measuring device that cross section is burner hearth 1 four angles place of rectangle; four angles place temperature is relatively low, can effectively ensure that it normally works, and; adopt low-temperature receiver air conservation probe, prevent temperature probe because of Fire Radiation temperature scaling loss.Further, low-temperature receiver air is directly blown into burner hearth along probe orientation, can effectively prevent the coking of probe place, dust stratification and cause disturb thermometric.Described spectrum temperature measuring device can select plurality of specifications, no longer launches to describe herein.Burner hearth high-temperature region refers generally to the position of flame, and general boiler hearth temperature is more than 1500 DEG C, and common contact temperature-measuring is fragile, and limits by length, and measured zone is limited, adopts spectroscopic temperature measurement, and measurement is accurate and measuring distance is large.As can CO be adopted
2spectrum-type temperature element, directly monitors the temperature in burner hearth, reaction speed in 10ms, temperature measurement accuracy ± 0.5%, rapid sensitive.
Specifically, described control system comprises the Distributed Control System with described temperature measurer electrical ties, the central control system be connected with described Distributed Control System communication, and the water-cooling wall overtemperature pre-alarming device be connected with described central control system communication.The DCS system (also may be other forms of control system certainly) of Distributed Control System power plant, the signal access DCS of the 4-20mA of spectroscopic temperature measurement instrument, then DCS imports PI (database) into, relevant data are got again by PI, this ensure that our communication does not disturb DCS, not to DCS build-up of pressure, other data messages can also be obtained simultaneously.
Wherein, because different atures of coal, different water-cooling wall arrangement forms, have different coking points, different corresponding coking temperature, this system can also be different according to boiler actual conditions, coal-fired different from the setting of system execution configuration, ensure that sensitivity and the specific aim of system.
Specifically, the composition of coal ash is very complicated, wherein Fe
2o
3, Fe
3o
4, FeO and FeS etc., fusing point is substantially all below 1600 DEG C, and the main oxides SiO in ash content
2, Al
2o
3, the fusing points such as CaO and MgO, substantially at about 2000 DEG C, not easily melt usually.Therefore the low melting point slag that coking is generated at a certain temperature by the oxide in ash content causes.SiO
2, Al
2o
3, CaO and content of MgO more, fusion point of ash is higher; Contrary ash fusion point is lower.In addition, the composition of surrounding medium also has impact to ash fusion point.In burner hearth, always have some reducibility gas (CO, H2 etc.) these reducibility gas can make the Fe that fusing point is higher at very high temperatures
2o
3be reduced into the FeO that fusing point is lower, coal fusion point of ash is reduced.
The utility model just from the root of coking, by the monitoring to temperature, and in conjunction with SiO
2, Al
2o
3the detection of the emissions such as CaO and MgO and, that is, DCS collects each side information, by with the algorithm with regress analysis method inside matlab, neural network algorithm, realize prediction and alarm to calculate, direct employing existing system, simplifies system layout, and is convenient to realize integral monitoring, and the data acquisition of burner hearth high-temperature region, serve key effect especially.
The above is only preferred embodiment of the present utility model; it should be noted that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a spectrum-type boiler anti-coking system, it is characterized in that, comprise multiple spectrum temperature measuring device be distributed on same cross section, burner hearth high-temperature region, the control system be connected with described spectrum temperature measuring device communication, described spectrum temperature measuring device comprises sidewall perforation by burner hearth to the temperature measurer of fire box temperature thermometric and the low-temperature receiver air that cools described temperature measurer.
2. spectrum-type boiler anti-coking system as claimed in claim 1, is characterized in that, comprise four and be distributed on the spectrum temperature measuring device that cross section is burner hearth four angles place of rectangle.
3. spectrum-type boiler anti-coking system as claimed in claim 1, it is characterized in that, described control system comprises the Distributed Control System with described spectrum temperature measuring device electrical ties, the central control system be connected with described Distributed Control System communication, and the water-cooling wall overtemperature pre-alarming device be connected with described central control system communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521055437.1U CN205227276U (en) | 2015-12-15 | 2015-12-15 | Spectrum formula boiler anti -coking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521055437.1U CN205227276U (en) | 2015-12-15 | 2015-12-15 | Spectrum formula boiler anti -coking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205227276U true CN205227276U (en) | 2016-05-11 |
Family
ID=55902337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521055437.1U Expired - Fee Related CN205227276U (en) | 2015-12-15 | 2015-12-15 | Spectrum formula boiler anti -coking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205227276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423273A (en) * | 2015-12-15 | 2016-03-23 | 天津鹰麟节能科技发展有限公司 | Spectroscopic boiler anti-coking system and control method |
-
2015
- 2015-12-15 CN CN201521055437.1U patent/CN205227276U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423273A (en) * | 2015-12-15 | 2016-03-23 | 天津鹰麟节能科技发展有限公司 | Spectroscopic boiler anti-coking system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161215 |