CN103528040B - Quick boiler starting system and method - Google Patents
Quick boiler starting system and method Download PDFInfo
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- CN103528040B CN103528040B CN201310482007.7A CN201310482007A CN103528040B CN 103528040 B CN103528040 B CN 103528040B CN 201310482007 A CN201310482007 A CN 201310482007A CN 103528040 B CN103528040 B CN 103528040B
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Abstract
The invention discloses a quick boiler starting system and method. Top heating devices are fixed on the two sides of a steam outlet and on the inner wall of the top of a steam pocket boiler body. An underwater heating device placed below a normal water level is horizontally arranged on the upper portion of a water pipe. Before cold state boiler starting, an MCU control system controls starting of the top heating devices and the underwater heating device to heat boiler water, during a heating process, a temperature detecting module controls temperature difference between the upper wall and the lower wall of the steam pocket boiler body to be within 50 DEG C, if a liquid level and air pressure detecting module detects abnormity of the liquid level and the air pressure in a steam pocket, or a temperature detecting module detects temperature abnormity, the MCU control system starts an air pressure and temperature alarming system and an emergency boiler stropping system and closes the top heating devices and the underwater heating device, and a boiler is subjected to normal ignition starting. The quick boiler starting system and method are suitable for a single-boiler system and a large boiler unit, heat stress generated by the steam pocket during a boiler starting process can be effectively lowered, the purpose of quick boiler starting is achieved, starting can be achieved when the boiler is stopped for a short time, and boiler body temperature is effectively prevented from being too low.
Description
Technical field
The present invention relates to boiler and open stove control field, what particularly relate to a kind of energy-and time-economizing opens furnace system fast.
Background technology
Boiler consumes a large amount of energy every year, and in ignition of the boiler to boiler normal course of operation, the energy of loss is the most considerable, and boiler energy-saving technology becomes the emphasis of its development day by day.Steam generator system mainly comprises: boiler body, coal supply system, boiler circuit, dedusting flue gas system, drum induced draught system, slag removing system etc., wherein, boiler circuit opens stove at boiler and occupies very consequence in running, boiler circuit is primarily of compositions such as water-cooling wall, lower header and drums, water screen tube is arranged in boiler wall surface uniformly, produces steam for absorption boiler heat; Lower header to be positioned at bottom water-cooling wall and to be communicated with bottom water screen tube, supplies water to water screen tube.Drum is a kind of high-temperature high-pressure apparatus, is positioned at the top of whole system; The steam produced in water screen tube can directly enter in drum, and drum can collect high-temperature steam for other system by water screen tube, and in drum, stove water is by lower collector pipe and lower header conducting, and such boiler vapor circulation system just can normally be set up.
Ignition of the boiler open stove just start time, on the one hand, because minority burner puts into operation, burn more weak, boiler heating uneven, corresponding evaporating heating surface is also uneven; On the other hand, lower owing to opening stokehold furnace wall temperature, in water screen tube, water temperature is lower, it is few that fuel combustion liberated heat is used for the water heat of water-cooling wall, and the quantity of steam that water-cooling wall produces is few, and water circulation is not normally set up, water-cooling wall, lower header and drum is so just easily made to produce larger thermal stress, thus making water-cooling wall explosion, drum deformity etc., damage equipment, has a strong impact on the normal operation of boiler.
The larger thermal stress of stokehold phase generation is opened in order to effectively prevent boiler, Modern Large group generally can add furnace bottom Steam Heating inlet tube at water-cooling wall lower collecting box, utilize steam turbine to take out high-temperature steam from adjacent stove and carry out heating furnace water, make it increasing temperature and pressure to a certain extent after carry out ignition of the boiler again.This system is called as furnace bottom steam-heating system or adjacent stove heating system, its principle of heating is exactly utilize the steam with certain pressure, higher temperature, add in water-cooling wall lower collecting box stove water, high-temperature steam is mixed with low temperature oven water, steam transfers heat to a kind of heating means of stove water.Furnace bottom steam-heating system heat-transfer effect is good, can be reached the saturation temperature under heating steam pressure, and effectively reduce the temperature difference of lower wall on drum by the stove coolant-temperature gage heated.Because high-temperature steam multi-source is in adjacent stove, so method cannot use single body of heater, and because will introduce hot adjacent stove high-temperature steam to carry out heating furnace water, technical requirement is higher, higher to adjacent stove high-temperature steam control overflow.
Summary of the invention
The object of the invention is in order to overcome the difficult point that exists in above-mentioned existing boiler Starting-up process and not enough and propose a kind of homogeneous heating, time short, be applicable to opening furnace system fast and opening stove method fast of single boiler.The present invention, by opening the method for stokehold preheating drum, reduces the thermal stress that in boiler Starting-up process, drum produces, efficiently solves because drum thermal stress crosses the problem that cauldron cannot open stove fast, shortens boiler and opens the stove time, reach the object opening stove fast.
The technical scheme that the present invention opens furnace system employing is fast: comprise drum body of heater, with normal water bit line, drum body of heater is divided into the upper part storing steam and the lower part storing stove water in drum body of heater, top is provided with steam (vapor) outlet, it is characterized in that: in the top inner wall of drum body of heater, be positioned at steam (vapor) outlet both sides and be fixed with top heater, two vertical blind separators are provided with side by side immediately below steam outlet, vertical blind separator bottom connects drain pipe input port, and drain pipe delivery outlet is stretched downwards under normal water bit line; Drum body of heater two side evenly arranges the water-cooling wall interface be connected with water-cooling wall top, drum furnace interior both sides are provided with two row's cyclone separators and two sealed compartments, sealed compartment is communicated with water-cooling wall interface and under being positioned at normal water bit line, sealed compartment top is communicated with bottom cyclone separator; Drum bottom of furnace body is provided with lower header interface, and lower header interface upper level installs feed pipe and blow-off pipe side by side, and feed pipe upper level layout is in the heater under water under normal water bit line; The upper and lower wall of drum body of heater is equipped with temperature detecting module, temperature detecting module connects MCU control system, MCU control system connects drum top heater and heater under water by corresponding controller, and MCU control system also connects liquid level, air pressure detection module, temperature alarm system, air pressure warning system and urgent blowing out system respectively.
The technical scheme that the present invention opens the employing of stove method is fast: open furnace system fast based on described, comprise the following steps: before A, boiler cold-state open stove, MCU control system opens drum top heater and heating devices heat stove water under water simultaneously, controls drum body of heater up-draft gasifier within 50 DEG C; B, in heating furnace water process, if it is abnormal that liquid level, air pressure detection module detect that liquid level in drum body of heater, air pressure occur, or temperature detecting module detects that in drum body of heater, temperature occurs abnormal, MCU control system opens air pressure warning system, temperature alarm system and urgent blowing out system, and closes top heater and heater under water; C, continuous rising along with temperature, pressure in drum body of heater, when detecting temperature, pressure reaches preset temperature, pressure time, close top heater and heater under water, ignition of the boiler is opened stove and is started normal work.
The present invention compares with method with prior art, and tool has the following advantages:
1, stove is opened quick.The present invention, by opening stokehold preheating drum, reduces the thermal stress that in boiler Starting-up process, drum produces, efficiently solves because drum thermal stress crosses the problem that cauldron cannot open stove fast, reach the object opening stove fast.
2, widely applicable.The present invention is applicable to single steam generator system, is also applicable to large-sized boiler unit, and to the not requirement of boiler type, only need change a little drum inner structure and add and open stove Ore-controlling Role fast and can use.
3, control conveniently accurately.The present invention is the heater directly controlled by electrical control in drum, many easily relative to control steam.And control system adopts PID to control, upper and lower wall temperature in drum can be controlled fast and accurately, effectively reduce the thermal stress that in boiler Starting-up process, drum produces, realize opening stove fast.
4, energy-and time-economizing.The present invention arranges heater uniformly on drum top and bottom, and relative to furnace bottom steam-heating system, homogeneous heating of the present invention, the heat time is short, can stove water in heating drum rapidly and efficiently.
5, technical requirement is low.The present invention adds after changing on original structure of boiler barrel basis to open furnace control system fast, and low relative to adjacent boiler bottom heating system specifications, structure is simple.
6, the present invention is equally applicable to boiler blowing out situation in short-term.When boiler needs blowing out in short-term, for preventing thermal loss excessive, furnace body temperature reduces, and boiler turns cold to affect and again opens the efficiency of furnace, and the present invention can open when boiler shutdown, by water circulation system, effectively prevents furnace body temperature too low.
Accompanying drawing explanation
Fig. 1 is the front view opening furnace system fast of the present invention;
Fig. 2 is the internal structure right view of drum body of heater 21 in Fig. 1;
Fig. 3 be in Fig. 1 under water heater 8 overlook enlarged drawing;
Fig. 4 is the mounting structure enlarged drawing of top heater 2 in Fig. 1
Fig. 5 is the electrical control block diagram opening furnace system fast of the present invention;
Fig. 6 is the control method opening furnace system fast of the present invention;
The sequence number of each parts and title in accompanying drawing: 1: steam (vapor) outlet; 2: top heater; 3: vertical blind separator; 4: water-cooling wall and upper collecting chamber interface; 5: cyclone separator; 6: chemical feed pipe; 7: emergency outlet; 8: heater under water; 9: base; 10: lower header interface; 11: feed pipe; 12: the electric output port of heater under water; 13: blow-off pipe; 14: normal water bit line; 15: drain pipe; 16: furnace wall; 17: heater control port under water; 18: top heater control port; 19: heat proof material; 20: the electric output port of top heater; 21: drum body of heater; 22: drum upper wall temperature detecting module; 23: drum lower wall temperature detecting module; 24: vapour side probe tube; 25: liquid level, air pressure detection module; 26: lateral water sampling tube; 27: sealed compartment; 28; Temperature alarm system; 29: air pressure warning system; 30: urgent blowing out system; 31:MCU control system.
Detailed description of the invention
See Fig. 1 and Fig. 2, for the present invention opens internal structure layout drawing and the side view of furnace system fast.With normal water bit line 14, drum body of heater 21 is divided into two parts in drum body of heater 21, top is for storing steam, and bottom is for storing stove water.Drum body of heater 21 top is provided with steam (vapor) outlet 1, and the steam of drum body of heater 21 inside can be discharged for other equipment use by steam (vapor) outlet 1.In the top inner wall of drum body of heater 21, against on inwall in steam (vapor) outlet 1 both sides and top heater 2 is installed, for heating the furnace wall, top 16 of drum body of heater 21.Two vertical blind separators 3 are installed immediately below steam outlet 1 side by side, vertical blind separator 3 bottom is provided with drain pipe 15, vertical blind separator 3 bottom connects the input port of drain pipe 15, drain pipe 15 delivery outlet is stretched downwards normal water bit line 14 times, below the liquid level being positioned at drum body of heater 21.The water that vertical blind separator 3 is separated is converged in drum body of heater 21 lower furnace water by drain pipe 15.Drum body of heater 21 two side evenly arranges water-cooling wall interface 4, is connected with water-cooling wall top by water-cooling wall interface 4, forms steam/water circulating loop.Sealed compartment 27 is communicated with water-cooling wall interface 4, the inner both sides of drum body of heater 21 are provided with two row's cyclone separators 5, steam water interface when boiler normally runs in water-cooling wall enters sealed compartment 27 in drum body of heater 21 by water-cooling wall interface 4, sealed compartment 27 is positioned at normal water bit line 14 times, sealed compartment 27 horizontal ends is communicated with bottom cyclone separator 5, steam water interface can enter cyclone separator 5 by sealed compartment 27 and carry out carbonated drink separation first, according to barodynamics principle, isolated steam flows upward enters vertical blind separator 3 and is again separated, isolated water flows downward and converges in stove water.Be provided with chemical feed pipe 6 bottom side cyclone separator 5, in stove water, add corresponding medicament, prevent from producing incrustation scale, damage equipment when feedwater heating and boiler normally run, influential system runs.Bottom drum body of heater 21, be provided with lower header interface 10, in drum body of heater 21, stove water enters lower header by lower collector pipe, and lower header is communicated with water screen tube, forms water-flow circuit.Lower header interface 10 upper level installs feed pipe 11 and blow-off pipe 13 side by side.On feed pipe 11 top by the horizontally disposed heater under water 8 of firm banking 9, for heating furnace water and furnace wall, drum body of heater 21 bottom 16.Install under water heater 8 time require that heater 8 is in normal water bit line 14 times under water, and keep a determining deviation with feed pipe 11.Bottom drum body of heater 21, relevant position arranges the electric output port 12 of heater under water, and relevant position, furnace wall, top 16 arranges the electric output port 20 of top heater, connects corresponding electrical control equipment.
Drum upper wall temperature detecting module 22 is set at the upper wall of drum body of heater 21, the lower wall of drum body of heater 21 arranges drum lower wall temperature detecting module 23, in order to the temperature of the upper wall and lower wall that detect drum body of heater 21 respectively.The liquid level of drum body of heater 21 is sampled by lateral water sampling tube 26 and is detected by liquid level, air pressure detection module 25, and the air pressure of drum body of heater 21 is sampled by vapour side probe tube 24 and detected by liquid level, air pressure detection module 25.
See Fig. 3, it is the top view of the present invention's heater 8 under water.Heater 8 adopts metal stainless steel tubular heater under water, is arranged on bottom drum body of heater 21 by firm banking 9 level, can heat stove water and drum lower wall rapidly and uniformly.Heater 8 connects external control devices by heater control port 17 under water under water, controls startup and the time-out of heater 8 under water.
See Fig. 4, be top of the present invention heater 2 mounting structure figure.Top heater 2 requires adherently to be arranged on drum body of heater 21 overhead vapor outlet 1 both sides, and between top heater 2 and drum wall, there is one deck heat proof material 19, this design can make top heater 2 heating furnace wall, drum top 16 uniformly, prevents hot-spot.Top heater 2 adopts chip strip heater, can simultaneously to furnace wall 16 and drum body of heater 21 upper strata air heat.Top heater 2 is provided with top heater control port 18 equally and connects external control devices.
See Fig. 5 Fig. 6, for electrical control block diagram of the present invention and open stove control method.The present invention adopts MCU control system 31, MCU control system 31 to connect drum upper wall temperature detecting module 22, drum lower wall temperature detecting module 23, liquid level, air pressure detection module 25 and temperature alarm system 28, air pressure warning system 29 respectively.MCU control system 31 by corresponding controller connect drum top heater 2 and under water heater 8, MCU control system 31 by control CCU to control drum top heater 2 and heater 8 under water.By the detection signal of drum upper wall temperature detecting module 22, drum lower wall temperature detecting module 23, adopt PID control system, control drum up-draft gasifier is rapidly and efficiently in prescribed limit.By temperature alarm system 28, air pressure warning system 29 and urgent blowing out system 30, guarantee the security reliability opening furnace control system fast.
When opening furnace system work fast, the method that cold conditions boiler realizes opening fast stove is:
The first step: boiler cold-state opens stokehold, the stove coolant-temperature gage in drum body of heater 21 is lower, if boiler directly opens stove drum body of heater 21 fast can produce larger thermal stress, has a strong impact on boiler and opens stove speed.For reducing the thermal stress that drum body of heater 21 produces in Starting-up process, opening stokehold MCU control system 31 at boiler and opening drum top heater 2 and heater 8 heating furnace water under water by controlling CCU simultaneously.Stove water in Fast Heating drum body of heater 21, reduces the thermal stress that when boiler opens stove, drum 21 produces, and realizes opening stove fast.In heating process, drum upper wall temperature detecting module 22, drum lower wall temperature detecting module 23 moment detect the temperature of lower wall on drum body of heater 21, control drum body of heater 21 up-draft gasifier by MCU control system 31 within 50 DEG C according to the detection signal of detection module.
Second step: in stove water heating process in drum body of heater 21, if it is abnormal that the liquid level of drum body of heater 21, air pressure detection module 25 detect that liquid level in drum 21, air pressure occur, or temperature detecting module detects that in drum 22, temperature occurs abnormal, MCU control system 31 should open air pressure warning system 29, temperature alarm system 28 and urgent blowing out system 30 according to the detection signal of detection module, and close top heater 2 and heater 8 under water immediately by controller, open emergency outlet 7 if desired, drainage pressure-reducing, prevents device damage.
3rd step: along with the continuous rising of temperature, pressure in drum 21, in drum 21, high temperature furnace water can enter in lower header and water-cooling wall by lower header interface 10, sets up normal water circulation system gradually.When detection module detects that in drum 21, temperature pressure reaches assigned temperature pressure, MCU control system 31 controls CCU and closes top heater 2 and heater 8 under water, and ignition of the boiler is opened stove and started normal work.
Claims (4)
1. one kind is opened furnace system fast, comprise drum body of heater (21), with normal water bit line (14), drum body of heater (21) is divided into the upper part storing steam and the lower part storing stove water in drum body of heater (21), top is provided with steam (vapor) outlet (1), it is characterized in that: in the top inner wall of drum body of heater (21), be positioned at steam (vapor) outlet (1) both sides and be fixed with top heater (2), two vertical blind separators (3) are provided with side by side immediately below steam (vapor) outlet (1), vertical blind separator (3) bottom connects drain pipe (15) input port, drain pipe (15) delivery outlet is stretched downwards under normal water bit line (14), drum body of heater (21) two side evenly arranges the water-cooling wall interface (4) be connected with water-cooling wall top, drum body of heater (21) inner both sides are provided with two row's cyclone separators (5) and two sealed compartments (27), sealed compartment (27) is communicated with water-cooling wall interface (4) and under being positioned at normal water bit line (14), sealed compartment (27) top is communicated with cyclone separator (5) bottom, drum body of heater (21) bottom is provided with lower header interface (10), lower header interface (10) upper level installs feed pipe (11) and blow-off pipe (13) side by side, and feed pipe (11) upper level layout is in the heater under water (8) under normal water bit line (14), drum body of heater (21) upper and lower wall is equipped with temperature detecting module, temperature detecting module connects MCU control system (31), MCU control system (31) connects drum top heater (2) and heater (8) under water by corresponding controller, and MCU control system (31) also connects liquid level, air pressure detection module (25), temperature alarm system (28), air pressure warning system (29) and urgent blowing out system (30) respectively.
2. one according to claim 1 opens furnace system fast, it is characterized in that: heater (8) is by the external control devices of heater control port (17) connection under water under water, top heater (2) connects external control devices by top heater control port (18), drum body of heater (21) bottom arranges the electric output port of heater under water (12), and top arranges the electric output port of top heater (20).
3. one according to claim 1 opens furnace system fast, it is characterized in that: cyclone separator (5) bottom of side is provided with chemical feed pipe (6).
4. that opens furnace system as claimed in claim 1 fast opens a stove method fast, it is characterized in that comprising the following steps:
Before A, boiler cold-state open stove, MCU control system (31) opens drum top heater (2) and heater (8) heating furnace water under water simultaneously, controls drum body of heater (21) up-draft gasifier within 50 DEG C;
B, in heating furnace water process, if it is abnormal that liquid level, air pressure detection module (25) detect that drum body of heater (21) interior liquid level, air pressure occur, or temperature detecting module detects that the interior temperature of drum body of heater (21) occurs extremely, MCU control system (31) opens air pressure warning system (29), temperature alarm system (28) and urgent blowing out system (30), and closes top heater (2) and heater (8) under water;
C, continuous rising along with drum body of heater (21) interior temperature, pressure, when detecting temperature, pressure reaches preset temperature, pressure time, close top heater (2) and heater (8) under water, ignition of the boiler is opened stove and is started normal work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310482007.7A CN103528040B (en) | 2013-10-16 | 2013-10-16 | Quick boiler starting system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310482007.7A CN103528040B (en) | 2013-10-16 | 2013-10-16 | Quick boiler starting system and method |
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| Publication Number | Publication Date |
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| CN103528040A CN103528040A (en) | 2014-01-22 |
| CN103528040B true CN103528040B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310482007.7A Expired - Fee Related CN103528040B (en) | 2013-10-16 | 2013-10-16 | Quick boiler starting system and method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141949A (en) * | 2014-08-07 | 2014-11-12 | 成都信鑫信息技术有限公司 | Intelligent boiler control system |
| CN106978217A (en) * | 2017-04-19 | 2017-07-25 | 山西阳煤化工机械（集团）有限公司 | Water-coal-slurry water cooled wall gasification furnace HP steam drum |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200952909Y (en) * | 2006-09-25 | 2007-09-26 | 张德时 | Automatic micro superheating varying-pressure heat storage apparatus |
| CN202188482U (en) * | 2011-06-02 | 2012-04-11 | 章礼道 | Pumpless direct-current furnace startup system capable of fully recycling working media and heat |
| CN101709874B (en) * | 2009-12-11 | 2012-05-30 | 云南大唐国际红河发电有限责任公司 | Starting method of 300000KW subcritical unit without electric pump |
| CN203024125U (en) * | 2013-01-01 | 2013-06-26 | 李左祥 | Horizontal-type water pipe steam boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012050505A (en) * | 2010-08-31 | 2012-03-15 | Sanyo Electric Co Ltd | Steam sterilizer |
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2013
- 2013-10-16 CN CN201310482007.7A patent/CN103528040B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200952909Y (en) * | 2006-09-25 | 2007-09-26 | 张德时 | Automatic micro superheating varying-pressure heat storage apparatus |
| CN101709874B (en) * | 2009-12-11 | 2012-05-30 | 云南大唐国际红河发电有限责任公司 | Starting method of 300000KW subcritical unit without electric pump |
| CN202188482U (en) * | 2011-06-02 | 2012-04-11 | 章礼道 | Pumpless direct-current furnace startup system capable of fully recycling working media and heat |
| CN203024125U (en) * | 2013-01-01 | 2013-06-26 | 李左祥 | Horizontal-type water pipe steam boiler |
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