CN201973728U - Ventilation control system applicable to dry type slag extractor - Google Patents
Ventilation control system applicable to dry type slag extractor Download PDFInfo
- Publication number
- CN201973728U CN201973728U CN201120110841XU CN201120110841U CN201973728U CN 201973728 U CN201973728 U CN 201973728U CN 201120110841X U CN201120110841X U CN 201120110841XU CN 201120110841 U CN201120110841 U CN 201120110841U CN 201973728 U CN201973728 U CN 201973728U
- Authority
- CN
- China
- Prior art keywords
- tilting section
- horizontal segment
- ventilation
- slag extractor
- control system
- 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 - Lifetime
Links
Images
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
The utility model relates to a ventilation control system applicable to a dry type slag extractor, which has a simple structure and can effectively control the quantity of the cold air entering a boiler. The ventilation control system applicable to dry type slag extractor comprises a slag extractor consisting of a horizontal section and an oblique section, ventilation devices are arranged on the horizontal section and the oblique section, and a slag falling port is arranged at the tail end of the oblique section; and the ventilation devices are connected with a ventilation control unit, a primary temperature detector and a secondary temperature detector are respectively arranged at the position where the horizontal section and the oblique section are crossed and the upper part of the oblique section, and the two temperature detectors are both connected with the ventilation control unit.
Description
Technical field
The utility model relates to a kind of ventilated control system that is applicable to dry-type slag extractor, the cold air amount that it can intelligentized adjusting enters boiler, can be according to slag temperature and slag amount control ventilation, can be under the few situation of underload Coal-fired capacity, reduce the cold air amount that enters boiler, improve boiler combustion efficiency.
Background technology
Because the dried slag removing system has advantages such as water saving, few, the dried slag purposes of subsidiary engine electricity consumption be wide, adopt the dried slag removing system when power plant transforms or just establishes more and more, dried slag removing system basic principle is exactly the convective motion that utilizes between surrounding air and the warm sludge, carry out heat exchange, thereby warm sludge is discharged after cooling off, cold air obtains heating, enters burner hearth under the effect by combustion chamber draft then.What China's installation at present was more is the MAC system of the Italian MAGALDI of introduction company, but list of references " application of dry slag disposal system on homemade 200MW unit ", the cold air amount that enters burner hearth in the MAC system is uncontrollable, and its design cold air amount designs according to the boiler EIAJ, because the negative pressure of boiler is certain when normal operation, even the amount when causing entering the cold air amount of boiler and boiler EIAJ like this when boiler at low load equates, it is excessive that the result is that the boiler at low load operation time enters the cold air amount of burner hearth, not only influence the stability of boiler combustion but also be equivalent to increase the boiler furnace bottom and leak out the air quantity by air preheater is reduced, exhaust gas temperature raises and reduces the boiler economy.
The cold blast rate that enters burner hearth in dried slag removing patent JP-A-63-6319 of Japan and China's patent 02135342.5 also is uncontrollable, equally has the same problem that influences boiler combustion stability with the MAC system.
In the domestic dry slag-removing machine patent, patent 00209485.1 and patent 200920073690.8 adopt the principle basically identical of control cold blast rate, promptly on ventilating opening, install a baffle plate additional, utilizing combustion chamber draft that baffle plate is inhaled to open makes nature cold wind enter the cooling warm sludge, we know that boiler combustion chamber draft when normal operation is stable substantially, be that combustion chamber draft is not along with boiler load changes, boiler is when underload like this, the natural cold blast rate that enters burner hearth does not reduce, that is to say at load and reduce, under the situation that slag amount reduces and under the peak load situation, the cold blast rate that enters burner hearth is the same, structure that we can say this control ventilation is to change ventilation effectively, the boiler economy under the non-rated load situation of raising boiler; Patent 200920312413.8 has proposed one can remote-operated throttle setting, and how do not propose air door installs, and automatically adjust with which kind of parameter or variable, its claim only be one can be contained on the dry-type slag extractor can remote-operated MOD; Adopt the pressure reduction of two pressure vacuum gauges in the patent 200610011273.1, enter the cold blast rate of burner hearth by pneumatic baffle control.This method realize existing big difficulty mainly show (1), because boiler negative pressure fluctuation range less (when normally moving between-100 ~ 100Pa), require the sensitivity and the precision of pressure vacuum gauge higher, and the environment of living in of vacuum meter is high temperature, many ashes, pressure tube is very easily blocked, and the table meter is damaged easily.And run into extreme case such as boiler extinguishment, and combustion chamber draft can arrive-3000Pa, and pressure vacuum gauge might outrange damage again like this.(2), because combustion chamber draft relatively stable, cause the pressure reduction of two pressure vacuum gauges less relatively, such result produces two kinds of situations, a kind of is if be provided with the sensitivity of controller higher, then cause the load of the cylinder of two pneumatic baffles and air-introduced machine to adjust to change always and make device damage, another situation is exactly as sensitivity design is lower, and then baffle plate is failure to actuate, and does not have the effect of regulating air quantity.(3) it is more to be used for controlling the equipment of intake, needs the special typhoon machine that is equipped with; Patent 200920283916.7 mentions also that at specification the intake of each air inlet can accurately regulate, but does not show how to regulate, regulates according to what principle or variable, does not also do the qualification of this respect at claims; Patent 201020197028.6 relates to a self-regulating air door and controls the cold blast rate that enters boiler, it is by the rotating air door equipment of actuator that its claim limits, do not show how to regulate yet, regulate to realize the remote auto adjustment, do not limit in the claims yet according to what principle or variable.
Can find according to above analysis, lack a kind of reliable and regulate the method enter the burner hearth cold blast rate effectively now.
The utility model content
The purpose of this utility model provides a kind of ventilated control system that is applicable to dry-type slag extractor exactly for addressing the above problem, and it is simple in structure, can effectively control the cold blast rate that enters boiler.
For achieving the above object, the utility model adopts following technical scheme:
A kind of ventilated control system that is applicable to dry-type slag extractor, it comprises slag extractor, and slag extractor is divided into horizontal segment and tilting section, is respectively equipped with ventilation unit at horizontal segment and tilting section, and the tilting section end is the cinder notch that falls; Ventilation unit is connected with ventilation control unit, simultaneously in horizontal segment and tilting section intersection and tilting section top be respectively equipped with first order temperature measuring equipment and second level temperature measuring equipment, the two-stage temperature measuring equipment all is connected with ventilation control unit.
The cinder notch place that falls of described slag extractor is provided with the slagging flapper.
The ventilation unit of described horizontal segment is the horizontal segment bellows of horizontal segment both sides, which is provided with one group of horizontal segment air inlet, on each horizontal segment air inlet, be provided with the horizontal segment controllable register, each horizontal segment controllable register is regulated connecting rod with horizontal segment and is connected, horizontal segment is regulated connecting rod and is connected with the driving cylinder, drives cylinder and is connected with ventilation control unit.
The ventilation unit of described tilting section is the tilting section bellows of tilting section both sides, which is provided with one group of tilting section air inlet, on each tilting section air inlet, be provided with the tilting section controllable register, each tilting section controllable register is regulated connecting rod with tilting section and is connected, tilting section is regulated connecting rod and is connected with another driving cylinder, and this drives cylinder and also is connected with ventilation control unit.
Described first order temperature measuring equipment is a plurality of first order infrared radiation thermometers that are arranged on horizontal segment and tilting section intersection; Described second level temperature measuring equipment is a plurality of second level infrared radiation thermometer that is arranged on bottom-up 2/3 position of tilting section.
A kind of employing is applicable to the control method of the ventilated control system of dry-type slag extractor, and its course of work is:
1) when boiler is not thrown coal, all controllable registers all are in closed condition, whether throwing coal with boiler is the initial opening signal, and the tilt adjustment baffle opening of tilting section is changed to 10% initial opening, and the horizontal controllable register aperture of horizontal segment is changed to 5% initial opening;
2) maximum of getting then in a plurality of first order infrared radiation thermometers is a signal, control horizontal segment controllable register, when maximum surpasses 400 ℃, then open the horizontal controllable register of horizontal segment continuously, up to the maximum of first order infrared radiation thermometer less than 400 ℃, when temperature measurer 9 records the peak temperature less than 350 ℃, then begin to close, if stop to throw coal then close whole controllable registers up to initial opening 5%;
The maximum of getting in the infrared radiation thermometer of a plurality of second level is a signal, control horizontal segment controllable register, when maximum surpasses 180 ℃, then open the tilt adjustment baffle plate of tilting section continuously, when second level infrared radiation thermometer records maximum less than 120 ℃, then begin to close, as stop to throw coal and then close controllable register up to initial opening 10%;
3) when boiler load is above greater than 75%, when go into stove pit ash content surpass design coal 5% or more with carry out burner hearth when blowing ash, the operations staff gives signal of ventilation control unit, and then ventilation control unit directly provides a feed-forward signal and makes whole controllable register apertures all increase by 5%; Directly get the pit ash cont signal to ventilation control unit if unit is equipped with the ature of coal on-line system, do not need the operations staff to participate in from the ature of coal on-line system; Equally whether to blow ash, adopt the on off state of blowing control valve to deliver to ventilation control unit, and do not need operations staff's participation as signal.
In the described step 1), employing has coal pulverizer to operate to signal for unit pulverized-coal system, operates to signal for the ball type pulverizer system so that machine supplying powder to be arranged.
At the igniting initial stage, all air inlets were not all closed during throwing oil was thrown coal, can reduce furnace bottom like this leaks out, burning and load up for boiler are very favourable, along with hearth load raises, ventilation control unit one receives and throws the coal signal that then the tilting section controllable register is put 10% aperture, horizontal segment controllable register aperture is changed to 5% aperture; Throw coal initial stage slag amount seldom, keeping initial opening gets final product, along with the increase of boiler load rising slag amount, then first order infrared radiation thermometer and second level infrared radiation thermometer begin to send signal to ventilation control unit, and ventilation control unit sends the action command of regulating whole controllable registers.
Owing to the cold blast rate that enters boiler mainly acts on is that slag is cooled off, make slag be cooled to 150-200 ℃, be disposed to slag bucket then, and the total trend of slag amount that is to say the boiler load height along with load variations, Coal-fired capacity is big, then quantity of slag is many, need cold blast rate many, otherwise boiler load is little, slag is few, then needs cold blast rate few; But coal changes greatly at present, and content of ashes is also different, makes the relation between slag amount and the load become a uncertainty relationship.Find that by the reality test under same load, the slag Volume Changes surpasses 15%; And in blowing grey process, slag amount is multiplied especially.
The utility model adopts bellows structure, ventilating opening is included in the inside, install air inlet and control baffle plate additional in the bellows outside, directly deslagging is carried out thermometric with multiple spot infrared measurement of temperature mode, control the air intake baffle opening with the slag temperature, decision enters the cold blast rate of boiler, whether blow ash with pit ash content and burner hearth simultaneously and revise the air intake baffle opening, no matter how many quantity of slag can both be with final slag temperature control between 150-200 ℃ like this, simultaneously the cold blast rate that enters boiler can be controlled at bottom line again, effect is not only to have reduced the deslagging heat loss but also the cold blast rate that enters boiler had been reduced and hot blast rate by air preheater increases, exhaust gas temperature is descended to some extent, and the boiler exhaust gas heat loss reduces.General effect makes deslagging heat loss and heat loss due to exhaust gas reduce the boiler efficiency raising.
Description of drawings
Fig. 1 is the dry-type slag extractor schematic diagram.
Fig. 2 is the ventilated control system schematic diagram front view of dry-type slag extractor.
Fig. 3 is the ventilated control system schematic diagram vertical view of dry-type slag extractor.
Among the figure: 1, furnace hopper, 2, ventilation unit, 3, cinder notch falls, 4, column, 5, drive cylinder, 6, the horizontal segment air inlet, 7, horizontal segment controllable register, 8, horizontal segment regulates connecting rod, 9, first order infrared radiation thermometer, 10, second level infrared radiation thermometer, 11, slagging flapper, 12, the tilting section bellows, 13, the horizontal segment bellows, 14, access door, 15, ventilation control unit, 16, the tilting section air inlet, 17, tilting section controllable register, 18, tilting section regulates connecting rod.
The specific embodiment
Below in conjunction with Figure of description and embodiment the technical solution of the utility model is further elaborated.
Among Fig. 1, Fig. 2, Fig. 3, it comprises slag extractor, and furnace hopper 1 is installed on the slag extractor.For the ease of the control of cold air amount, reduce the equipment complexity, slag extractor is divided into horizontal segment and tilting section, be respectively equipped with ventilation unit 2 at horizontal segment and tilting section, the tilting section end is the cinder notch 3 that falls; It can be the PLC control module ventilation unit 2 and ventilation control unit 15() be connected, simultaneously in horizontal segment and tilting section intersection and tilting section top be respectively equipped with first order temperature measuring equipment and second level temperature measuring equipment, the two-stage temperature measuring equipment all is connected with ventilation control unit 15.
Cinder notch 3 places that fall of described slag extractor are provided with slagging flapper 11, further prevent unnecessary leaking out; Cinder notch 3 places that fall also are provided with access door 14.
The ventilation unit of described horizontal segment is the horizontal segment bellows 13 of horizontal segment both sides, which is provided with one group of horizontal segment air inlet 6, on each horizontal segment air inlet 6, be provided with horizontal segment controllable register 7, each horizontal segment controllable register 7 is regulated connecting rod 8 with horizontal segment and is connected, horizontal segment is regulated connecting rod 8 and is connected with driving cylinder 5, drives cylinder 5 and is connected with ventilation control unit 15.
The ventilation unit of described tilting section is the tilting section bellows 12 of tilting section both sides, which is provided with one group of tilting section air inlet 16, on each tilting section air inlet 16, be provided with tilting section controllable register 17, each tilting section controllable register 17 is regulated connecting rod 18 with tilting section and is connected, tilting section is regulated connecting rod 18 and is connected with another driving cylinder 5, and this drives cylinder 5 and also is connected with ventilation control unit 15.
The main purpose that two bellows are set is original little ventilating opening to be included in the bellows the inside be convenient to centralized Control.The quantity of horizontal segment air inlet 6 and tilting section air inlet 16 changes as required, can be that every side is provided with three, four or two etc.Level regulates connecting rod 8 and tilting section is regulated connecting rod 18 unified adjusting controls to reduce driving arrangement quantity, drives (fixed installation of drive unit is fixed according to field condition, and driving arrangement also can adopt electronic) by the cylinder 5 on the fixed installation column 4 then
Described first order temperature measuring equipment is a plurality of first order infrared radiation thermometers 9 that are arranged on horizontal segment and tilting section intersection; Described second level temperature measuring equipment is a plurality of second level infrared radiation thermometer 10 that is arranged on bottom-up 2/3 position of tilting section.
The two-stage infrared thermometer requires to press the slag extractor width and evenly installs three, and to prevent the test distortion of single infrared radiation thermometer, infrared thermometer can provide the signal of 4-20mA, and what all signals received and instructed sends all by the PLC control module.
The concrete course of work of the present utility model is:
When boiler is not thrown coal, all horizontal segment controllable registers 7 and tilting section controllable register 17 all are in closed condition, whether throwing coal with boiler is that (employing has coal pulverizer to operate to signal to the initial opening signal for unit pulverized-coal system, so that being arranged, machine supplying powder operates to signal for the ball type pulverizer system), tilting section controllable register 17 apertures of tilting section are changed to 10% initial opening, and horizontal segment controllable register 7 apertures of horizontal segment are changed to 5% initial opening; Getting three maximums in the first order infrared radiation thermometer 9 then is signal, control horizontal segment controllable register 7, when maximum surpasses 400 ℃, then open the horizontal segment controllable register 7 of horizontal segment continuously, up to the maximum of first order infrared radiation thermometer 9 less than 400 ℃, when first order infrared radiation thermometer 9 records the peak temperature less than 350 ℃, then begin to close horizontal segment controllable register 7 one by one or progressively, if stop to throw coal then close whole controllable registers up to initial opening 5%; Getting three maximums in the second level infrared radiation thermometer 10 is signal, control horizontal segment controllable register 7, when maximum surpasses 180 ℃, then open the tilting section controllable register 17 of tilting section continuously, when second level infrared radiation thermometer 10 records maximum less than 120 ℃, then begin to close tilting section controllable register 17 one by one or progressively, as stop to throw coal and then close controllable register up to initial opening 10%.When boiler load is above greater than 75%, when go into stove pit ash content surpass design coal 5% or more with carry out burner hearth when blowing ash, the operations staff gives 15 1 signals of ventilation control unit, and then ventilation control unit 15 directly provides a feed-forward signal and makes whole controllable register apertures all increase by 5%; Can directly get the pit ash cont signal to ventilation control unit 15 if unit is equipped with the ature of coal on-line system, not need the operations staff to participate in from the ature of coal on-line system; Equally whether to blow ash, can adopt the on off state of blowing control valve to deliver to ventilation control unit 15, and not need operations staff's participation as signal.
At the igniting initial stage, all air inlets were not all closed during throwing oil was thrown coal, can reduce furnace bottom like this leaks out, burning and load up for boiler are very favourable, along with hearth load raises, ventilation control unit one is received and is thrown the coal signal, then tilting section controllable register 17 is put 10% aperture, horizontal segment controllable register 7 apertures of horizontal segment are changed to 5% aperture, throw coal initial stage slag amount seldom, keep initial opening and get final product, along with the increase of boiler load rising slag amount, then first order infrared radiation thermometer 9 and three second level infrared radiation thermometers 10 begin to send signal to ventilation control unit 15, and ventilation control unit 15 sends the action command of regulating whole controllable registers.
Claims (5)
1. a ventilated control system that is applicable to dry-type slag extractor is characterized in that it comprises slag extractor, and slag extractor is divided into horizontal segment and tilting section, is respectively equipped with ventilation unit at horizontal segment and tilting section, and the tilting section end is the cinder notch that falls; Ventilation unit is connected with ventilation control unit, simultaneously in horizontal segment and tilting section intersection and tilting section top be respectively equipped with first order temperature measuring equipment and second level temperature measuring equipment, the two-stage temperature measuring equipment all is connected with ventilation control unit.
2. the ventilated control system that is applicable to dry-type slag extractor as claimed in claim 1 is characterized in that, the cinder notch place that falls of described slag extractor is provided with the slagging flapper.
3. the ventilated control system that is applicable to dry-type slag extractor as claimed in claim 1 or 2, it is characterized in that, the ventilation unit of described horizontal segment is the horizontal segment bellows of horizontal segment both sides, which is provided with one group of horizontal segment air inlet, on each horizontal segment air inlet, be provided with the horizontal segment controllable register, each horizontal segment controllable register is regulated connecting rod with horizontal segment and is connected, and horizontal segment is regulated connecting rod and is connected with the driving cylinder, drives cylinder and is connected with ventilation control unit.
4. the ventilated control system that is applicable to dry-type slag extractor as claimed in claim 1 or 2, it is characterized in that, the ventilation unit of described tilting section is the tilting section bellows of tilting section both sides, which is provided with one group of tilting section air inlet, on each tilting section air inlet, be provided with the tilting section controllable register, each tilting section controllable register is regulated connecting rod with tilting section and is connected, and tilting section is regulated connecting rod and is connected with another driving cylinder, and this drives cylinder and also is connected with ventilation control unit.
5. the ventilated control system that is applicable to dry-type slag extractor as claimed in claim 1 is characterized in that, described first order temperature measuring equipment is a plurality of first order infrared radiation thermometers that are arranged on horizontal segment and tilting section intersection; Described second level temperature measuring equipment is a plurality of second level infrared radiation thermometer that is arranged on bottom-up 2/3 position of tilting section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120110841XU CN201973728U (en) | 2011-04-15 | 2011-04-15 | Ventilation control system applicable to dry type slag extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120110841XU CN201973728U (en) | 2011-04-15 | 2011-04-15 | Ventilation control system applicable to dry type slag extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201973728U true CN201973728U (en) | 2011-09-14 |
Family
ID=44578830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120110841XU Expired - Lifetime CN201973728U (en) | 2011-04-15 | 2011-04-15 | Ventilation control system applicable to dry type slag extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201973728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155743A (en) * | 2011-04-15 | 2011-08-17 | 山东电力研究院 | Ventilation control system and method applicable to dry type slag extractor |
-
2011
- 2011-04-15 CN CN201120110841XU patent/CN201973728U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155743A (en) * | 2011-04-15 | 2011-08-17 | 山东电力研究院 | Ventilation control system and method applicable to dry type slag extractor |
| CN102155743B (en) * | 2011-04-15 | 2012-11-28 | 山东电力研究院 | Ventilation control system and method applicable to dry type slag extractor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102155743B (en) | Ventilation control system and method applicable to dry type slag extractor | |
| CN104019541A (en) | Environment-friendly gasification counter-flow combustion hot-blast stove | |
| CN107084404A (en) | A kind of accurate air distribution method of thermal power plant based on combustion control | |
| CN102221201A (en) | Equal-bed pressure cold slag fluidized bed of circulating fluidized bed boiler and operation method thereof | |
| CN203273907U (en) | Combustion air system of large-scale household garbage incinerator | |
| CN201047710Y (en) | Energy-saving clean hot air generator | |
| CN201973728U (en) | Ventilation control system applicable to dry type slag extractor | |
| CN105135411A (en) | Adjusting system and method for preventing fire extinguishing caused by pressure jump of dry bottom hopper of coal-fired boiler | |
| CN207334775U (en) | Biological mass gas burnnig boiler flue gas emission oxygen content monitors Analysis Control Unit | |
| CN201715548U (en) | Intelligent oxygen content optimizing and regulating device for coal-fired industrial boiler | |
| CN108105829A (en) | Biomass boiler intelligent heating device | |
| CN107166428A (en) | A kind of grate firing boiler flue gas oxygen content control system based on flue gas recirculation | |
| CN210568561U (en) | Control system for secondary air box of opposed firing boiler | |
| CN208365576U (en) | A kind of boiler smoke wind blending heating regulating system | |
| CN203068781U (en) | Hot blast stove | |
| CN201892305U (en) | Energy-saving boiler | |
| CN207963145U (en) | High-efficiency environment friendly tangerine stalk solid biomass gasification fired boiler | |
| CN205825412U (en) | A kind of coal-fired hot-blast stove | |
| CN205897128U (en) | Circulating fluidized bed boiler fly ash retrieves controlling means | |
| CN206828447U (en) | A kind of quenching stove prestores the control pressurer system of room | |
| CN206430377U (en) | A kind of coal-burning boiler | |
| CN104019444A (en) | Self-suction environment-friendly gasification inverse combustion heating furnace | |
| CN108386855A (en) | A kind of deslagging device of boiler slag | |
| CN217978817U (en) | Incinerator primary air device capable of adjusting temperature in sections | |
| CN215570538U (en) | W boiler secondary bellows ash removal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110914 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |