CN204611743U - Boiler controller system - Google Patents
Boiler controller system Download PDFInfo
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- CN204611743U CN204611743U CN201520128861.8U CN201520128861U CN204611743U CN 204611743 U CN204611743 U CN 204611743U CN 201520128861 U CN201520128861 U CN 201520128861U CN 204611743 U CN204611743 U CN 204611743U
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- air duct
- controller system
- control valve
- boiler controller
- cold air
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- 239000003245 coal Substances 0.000 claims abstract description 115
- 238000000197 pyrolysis Methods 0.000 claims abstract description 104
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 239000007787 solid Substances 0.000 claims description 15
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 20
- 239000000446 fuel Substances 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 12
- 239000000843 powder Substances 0.000 abstract description 11
- 238000010304 firing Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 43
- 239000007789 gas Substances 0.000 description 37
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 238000003786 synthesis reaction Methods 0.000 description 9
- 239000000779 smoke Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000005979 thermal decomposition reaction Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- 230000000391 smoking effect Effects 0.000 description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
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- 239000010881 fly ash Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of boiler controller system, comprise body of heater, main burner, fire gas burner again, hot air duct and coal pulverizer, boiler controller system also comprises pulverized coal pyrolysis stove, cold air duct and small oil gun, the outlet of pulverized coal pyrolysis stove is communicated with burner hearth by firing gas burner again, the outlet of coal pulverizer is communicated with burner hearth by main burner, hot air duct is communicated with the entrance of coal pulverizer, small oil gun to be arranged on cold air duct and to make the cold wind in cold air duct change hot blast in cold air duct combustion, wherein, with pulverized coal pyrolysis stove, cold air duct is switchably communicated with that with hot air duct hot blast is delivered to pulverized coal pyrolysis stove or coal pulverizer.The small oil gun of this boiler controller system can make coal pulverizer reach temperature needed for powder process when boiler controller system cold start, again can when boiler controller system normally runs for pulverized coal pyrolysis stove provides pyrolysis institute calorific requirement, there is provided suitable reburning fuel for implementing reburning technology, thus reduce boiler controller system NOx emission.
Description
Technical field
The utility model relates to thermal machine field, particularly a kind of boiler controller system.
Background technology
Coal-burning boiler unit can produce a large amount of NOx, SO in running
2, the pollutant such as dust, wherein (NOx comprises NO, NO to nitrogen oxide
2and N
2o) account for 67%, substantially one of main source being considered to atmosphere pollution, threaten the life and health of the mankind.Increasingly strict along with national environmental protection policy, propose higher environmental requirement to thermal power plant, from July, 2014, existing thermal power generation boiler unit discharged nitrous oxides concentration is no more than 100mg/m
3.
The control measure of current power plant to NOx mainly contain low NOx combusting technology and SCR (Selective Catalytic Reduction, SCR) technology two kinds.SCR technology is most widely used and the most effective technology at present, but this technology there is initial outlay and operating cost is higher, and there is the security hidden trouble that ammonia reveals.Low NOx combusting technology mainly comprises low oxygen combustion, flue gas recirculation, low-NOx combustor technology, air classification, reburning technology etc.Low NOx combusting technology cost is lower, but general reduction NOx amplitude is less.Usually, hypoxemia runs, and the NOx percent reduction of the low NOx combusting technologies such as flue gas recirculation, low-NOx combustor technology, air classification is 10 ~ 40%.And adopt gaseous fuel to compare other low NOx combusting technologies as the reburning technology of reburning fuel to there is some superiority in NOx removes, can 60% ~ 70% be reached.
Reburning technology is also called fuel staging techniques or furnace reduction technology, it be reduce NOx emission many stoves in one of most effective measures in control method.It is that the fuel of 80% ~ 85% is sent into primary zone, burn be greater than the condition of 1 at excess air factor under, all the other 15% ~ 20% fuel spray into formation reburning zone as reducing agent at a certain correct position in the top in primary zone, reburning zone excess air coefficient is less than 1, the NOx reduction will generated in reburning zone, further suppress the generation of NOx simultaneously.Natural gas, blast furnace gas and coke-stove gas etc. can as reburning fuels, but for not stablizing the power plant of source of the gas, the preparation of gas is one and compares stubborn problem, therefore implement a set of small investment with how suiting measures to local conditions, efficiency is high, and the simple combustion system of structure, becomes the key promoting denitration by refueling technology.
Chinese patent CN101761920A (denomination of invention: a kind of utilize pulverized coal pyrolysis gas to fire again low NOx combustion method and device) mainly utilize the part heat smoke of pulverized-coal fired boiler unit back-end ductwork enter pyrolysis reactor make pulverized coal pyrolysis produce again combustion needed for the body of combustion gas again, send into pulverized-coal fired boiler unit reburning zone reducing NOx, realize the low NOx drainage of pulverized-coal fired boiler unit.
Wherein, pyrolysis of coal refers to heats under the condition of isolated air coal, and the complex process of a series of physical change and chemical change occurs coal at different temperatures.Pulverized coal pyrolysis stove is passed into after in stove coal dust and required flue gas, under high temperature action, part pulverized coal pyrolysis produced CO, H
2in a kind of device of the body of combustion gas again again needed for combustion.
But the main shortcoming of this method needs to increase optional equipment to smoke stove blower fan; and flue gas belongs to high-temperature medium; and be mingled with a large amount of fly ash granule in flue gas; smoke the operation under the condition of be everlasting high temperature and dust of stove blower fan and can cause the fault and maintenance down of smoking stove blower fan; while labor intensive, material resources; the discharge value of unit NOx can not meet discharge standard, affects the normal operation of unit.
In addition, boiler controller system cold start is one of common startup type of station boiler unit, all needs cold start after new-built unit and in-service unit maintenance.When boiler controller system black furnace starts, if will start pulverized coal preparation system, the large oil gun that needs first to put into operation carries out baker, until hot blast temperature reaches the requirement of powder process, needs like this to consume a large amount of fuel oil.Can realize not needing building separately starting trouble unit for the black furnace pulverized coal preparation system solving this problem and utility model or utilize external heat source and independent startup generating set generates electricity by way of merging two or more grid systems, realizing boiler controller system and save fuel oil, start safely and fast.Wherein black furnace pulverized coal preparation system refers to when boiler controller system cold start, by installing steam air heater or oily auxiliary heating system additional to entering the cold air heating of coal pulverizer to the temperature needed for coal pulverizer powder process on First air hot air duct, realizes the cold start of boiler controller system.
Chinese patent CN102506407A (denomination of invention: boiler cold-state starts oily auxiliary heating system and generating set without thermal source starting method) mainly installs a set of oily auxiliary heating system utilizing small oil gun at the hot air duct of coal pulverizer inlet, when boiler controller system cold start, to the cold air preheating entering coal pulverizer, coal pulverizer is made to reach condition of work.Wherein, small oil gun be a kind of by air or steam by after fuel-oil atmozation, make combustion oil be atomized into fine particle, clean-burning ignition installation.
The shortcoming of this method is exactly after boiler controller system starts, utilize the oily auxiliary heating system of small oil gun out of service, because the relatively large oil gun of small oil gun nozzle orifice is less, during oil gun system shutdown, the contamination precipitation in oil, adds in hot blast containing a large amount of dusts, the problems such as small oil gun spray nozzle clogging can be caused, when enabling Deng next time, need first just can come into operation to small oil gun cleaning, very inconvenient.
Utility model content
The purpose of this utility model is to provide a kind of boiler controller system, the small oil gun of this boiler controller system can make coal pulverizer reach temperature needed for powder process when boiler controller system cold start, again can when boiler controller system normally runs for pulverized coal pyrolysis stove provides pyrolysis institute calorific requirement, there is provided suitable reburning fuel for implementing reburning technology, thus reduce boiler controller system NOx emission.
The utility model provides a kind of boiler controller system, comprise body of heater, main burner, fire gas burner again, hot air duct and coal pulverizer, described boiler controller system also comprises pulverized coal pyrolysis stove, cold air duct and small oil gun, the outlet of described pulverized coal pyrolysis stove is communicated with described burner hearth by the described gas burner that fires again, the outlet of described coal pulverizer is communicated with described burner hearth by described main burner, described hot air duct is communicated with the entrance of described coal pulverizer, described small oil gun to be arranged on described cold air duct and to make the cold wind in described cold air duct change hot blast in described cold air duct combustion, wherein, with described pulverized coal pyrolysis stove, described cold air duct is switchably communicated with that with described hot air duct described hot blast is delivered to described pulverized coal pyrolysis stove or described coal pulverizer.
Further, described boiler controller system also comprises gas-solid separator, described gas-solid separator comprises the outlet of entrance, gas vent and carbon residue, and the outlet of described pulverized coal pyrolysis stove is communicated with the entrance of described gas-solid separator, and described gas vent is communicated with described burner hearth by the described gas burner that fires again.
Further, described boiler controller system also comprises carbon residue burner, and described carbon residue outlet is communicated with described burner hearth by described carbon residue burner.
Further, described carbon residue burner is arranged at the downstream of described main burner, describedly fires the downstream that gas burner is arranged at described carbon residue burner again.
Further, the port of export of described cold air duct is connected with described hot air duct, described boiler controller system also comprises pyrolysis oven air inlet duct, the first control valve and the second control valve, the arrival end of described pyrolysis oven air inlet duct is connected with described cold air duct, the port of export of described pyrolysis oven air inlet duct is connected with described pulverized coal pyrolysis stove, described first control valve is arranged on described pyrolysis oven air inlet duct, and described second control valve to be arranged on described cold air duct and between the arrival end and the port of export of described cold air duct of described pyrolysis oven air inlet duct.
Further, described boiler controller system also comprises the 3rd control valve, and described 3rd control valve to be arranged on described cold air duct and between the arrival end and the arrival end of described pyrolysis oven air inlet duct of described cold air duct.
Further, described small oil gun is between described 3rd control valve and the arrival end of described pyrolysis oven air inlet duct.
Further, described boiler controller system also comprises by-pass line and the 4th control valve, the arrival end of described by-pass line is connected with described cold air duct respectively with the port of export, and the arrival end of described by-pass line is between described small oil gun and described 3rd control valve, the port of export of described by-pass line is between described second control valve and the port of export of described cold air duct, and described 4th control valve is arranged on described by-pass line.
Further, described boiler controller system also comprises the 5th control valve, and described 5th control valve to be arranged on described hot air duct and to be positioned at the upstream of the port of export of described cold air duct.
Further, described first control valve and described second control valve are stop valve; Described 3rd control valve, described 4th control valve and described 5th control valve are control valve.
Based on the boiler controller system that the utility model provides, to be arranged on cold air duct due to small oil gun and to make the cold wind in cold air duct change hot blast in cold air duct combustion, and with pulverized coal pyrolysis stove, cold air duct is switchably communicated with that with hot air duct hot blast is delivered to pulverized coal pyrolysis stove or coal pulverizer.Therefore, when boiler controller system cold start, the hot blast heated by small oil gun can be sent into coal pulverizer in cold air duct, make coal pulverizer reach temperature needed for powder process, realize the cold start of boiler controller system.And when boiler controller system normally runs, pulverized coal pyrolysis stove can will be sent into by the hot blast that small oil gun heats in cold air duct, for pulverized coal pyrolysis stove provides the heat needed for pyrolysis fire coal, formed containing CO, H
2, CO
2pyrolysis forming gas, and wherein CO and H
2there is very strong reduction, this pyrolysis synthesis gas is passed into the reburning zone of boiler controller system burner hearth as reburning fuel, the NOx that primary zone generates can be reduced into N
2, reach the object of the NOx emission reducing coal-burning boiler unit.In addition; due to without the need to install smoke stove blower fan also overcome pulverized coal pyrolysis device of the prior art smoke heat furnace from boiler controller system back-end ductwork for a long time by smoking stove blower fan time, what high temperature and grieshoch environment caused smoke, and stove fan trouble shuts down the problem affecting boiler controller system NOx emission.And can not stop using when boiler controller system normally runs due to small oil gun, also alleviate the problem of small oil gun spray nozzle clogging.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present utility model, further feature of the present utility model and advantage thereof will become clear.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the principle schematic of the boiler controller system of the utility model preferred embodiment.
In Fig. 1, each Reference numeral represents respectively:
1, Pulverized Coal Bin;
2, the first power transportation pipe;
3, pulverized coal pyrolysis stove;
4, pyrolysis oven air inlet duct;
5, the first control valve;
6, small oil gun;
7, cold air duct;
8, the 3rd control valve;
9, the 5th control valve;
10, hot air duct;
11, thermal decomposition product outlet conduit;
12, gas-solid separator;
13, the second control valve;
14, the 4th control valve;
15, gas pipeline is fired again;
16, carbon residue conveyance conduit;
17, the second power transportation pipe;
18, main burner;
19, coal pulverizer;
20, fire air nozzle;
21, gas burner is fired again;
22, carbon residue burner;
23, burner hearth;
24, body of heater;
25, by-pass line.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing description.In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Fig. 1 is the principle schematic of the boiler controller system of the utility model preferred embodiment.As shown in Figure 1, this embodiment boiler controller system comprises Pulverized Coal Bin 1, first power transportation pipe 2, pulverized coal pyrolysis stove 3, pyrolysis oven air inlet duct 4, first control valve 5, small oil gun 6, cold air duct 7, 3rd control valve 8, 5th control valve 9, hot air duct 10, thermal decomposition product outlet conduit 11, gas-solid separator 12, second control valve 13, 4th control valve 14, fire gas pipeline 15 again, carbon residue conveyance conduit 16, second power transportation pipe 17, main burner 18, coal pulverizer 19, fire air nozzle 20, fire gas burner 21 again, carbon residue burner 22, there is body of heater 24 and the by-pass line 25 of burner hearth 23.
Wherein, main burner 18, fire the chief component that gas burner 21, fire air nozzle 20 and burner hearth 23 are low NOx combustion system again.Pulverized Coal Bin 1, first power transportation pipe 2, pulverized coal pyrolysis stove 3, thermal decomposition product outlet conduit 11 and gas-solid separator 12 are the chief component of pulverized coal pyrolysis device.Small oil gun 6, cold air duct 7, hot air duct 10 and coal pulverizer 19 is the chief component of black furnace pulverized coal preparation system.
Burner hearth 23 is divided into primary zone, reburning zone and burning-out zone successively from upstream to downstream.Main burner 18, carbon residue burner 22, fire gas burner 21 and fire air nozzle 20 is set in turn in body of heater 24 from upstream to downstream again.Main burner 18 points three layers layout.
The two ends of the first power transportation pipe 2 are connected with the outlet of Pulverized Coal Bin 1 and the fuel inlet of pulverized coal pyrolysis stove 3 respectively, to be delivered in pulverized coal pyrolysis stove 3 by the coal dust in Pulverized Coal Bin 1.
The outlet of pulverized coal pyrolysis stove 3 is communicated with burner hearth 23 by firing gas burner 21 again, the outlet of coal pulverizer 19 is communicated with burner hearth 23 by main burner 18, hot air duct 10 is communicated with the entrance of coal pulverizer 19, small oil gun 6 to be arranged on cold air duct 7 and to make the cold wind in cold air duct 7 change hot blast in cold air duct 7 combustion, wherein, cold air duct 7 is switchably communicated with hot blast to be delivered to pulverized coal pyrolysis stove 3 or coal pulverizer 19 with pulverized coal pyrolysis stove 3 with hot air duct 10.Preferably, small oil gun 6 is arranged on the elbow on cold air duct 7.
When boiler controller system black furnace starts, small oil gun 6 is for heating the cold wind needed for pulverized coal preparation system.Now the load of boiler controller system is lower, and NOx emission concentration is lower.After normally starting Deng boiler controller system, along with the rising of boiler controller system load, fire box temperature is also in rising, NOx emission concentration also can increase gradually, First air hot blast is enough to the normal operation ensureing pulverized coal preparation system, now the hot blast that small oil gun 6 heats can be switched to pulverized coal pyrolysis stove 3, the pyrolysis synthesis gas produced by pulverized coal pyrolysis is fired and reduces boiler controller system NOx emission.Therefore, in the boiler controller system of the present embodiment, small oil gun 6 can realize reducing boiler controller system NOx emission and black furnace powder process two kinds of purposes simultaneously.
In the present embodiment, the outlet of pulverized coal pyrolysis stove by gas-solid separator 12 with fire gas burner 21 again and be communicated with burner hearth 23.Gas-solid separator 12 comprises the outlet of entrance, gas vent and carbon residue, and the outlet of pulverized coal pyrolysis stove 3 is communicated with by thermal decomposition product outlet conduit 11 with the entrance of gas-solid separator 12.Gas vent is successively by fire gas pipeline 15 again and fire gas burner 21 again and be communicated with burner hearth 23.And carbon residue outlet is communicated with burner hearth 23 with carbon residue burner 22 by carbon residue conveyance conduit 16 successively.
As shown in Figure 1, the port of export of cold air duct 7 is connected with hot air duct 10, and the arrival end of pyrolysis oven air inlet duct 4 is connected with cold air duct 7, and the port of export of pyrolysis oven air inlet duct 4 is connected with pulverized coal pyrolysis stove 3.First control valve 5 is arranged on pyrolysis oven air inlet duct 4.Second control valve 13 to be arranged on cold air duct 7 and between the arrival end and the port of export of cold air duct 7 of pyrolysis oven air inlet duct 4.In the present embodiment, the first control valve 5 and the second control valve 13 are electric check valve.
Switchably be communicated with to select hot blast to be delivered to pulverized coal pyrolysis stove 3 or coal pulverizer 19 with pulverized coal pyrolysis stove 3 and hot air duct 10 by controlling to realize cold air duct 7 to the first control valve 5 with the break-make of the second control valve 13.
Pulverized coal pyrolysis stove 3 is connected with pyrolysis oven air inlet duct 4, the hot blast that cold wind in cold air duct 7 is formed after small oil gun 6 heats can be entered in pulverized coal pyrolysis stove 3 by pyrolysis oven air inlet duct 4 when the first control valve 5 is opened, thus provides heat for pulverized coal pyrolysis.
3rd control valve 8 to be arranged on cold air duct 7 and between the arrival end and the arrival end of pyrolysis oven air inlet duct 4 of cold air duct 7.3rd control valve 8 is preferably control valve, enters the cold flow in cold air duct 7 for controlling.
Small oil gun 6 is between the 3rd control valve 8 and the arrival end of pyrolysis oven air inlet duct 4.The arranging of position of small oil gun 6 only to needing the air being heated to be hot blast to heat, can save energy.
The arrival end of by-pass line 25 is connected with cold air duct 7 respectively with the port of export, and the arrival end of by-pass line 25 is between small oil gun 6 and the 3rd control valve 8, and the port of export of by-pass line 25 is between the second control valve 13 and the port of export of cold air duct 7.4th control valve 14 is arranged on by-pass line 25.4th control valve 14 is preferably control valve.By-pass line 25 and the 4th control valve 14 regulate the temperature needed for coal pulverizer 19 powder process for the mixing when boiler controller system normally runs by cold wind and hot blast.
5th control valve 9 to be arranged on hot air duct 10 and to be positioned at the upstream of the port of export of cold air duct 7.5th control valve 9 is preferably control valve, and the 5th control valve 9 is for regulating First air hot blast air quantity and for coordinating the 4th control valve 14 to regulate temperature needed for coal pulverizer 19 powder process.
How the boiler controller system illustrating above embodiment below in conjunction with Fig. 1 realizes utilizing pulverized coal pyrolysis synthesis gas to fire reduction boiler controller system NOx emission again.
During the normal load carrying of boiler controller system, the main fuel coal of 85% ~ 95% is sent into the primary zone of burner hearth by main burner 18, primary zone excess air coefficient α is that under the condition of 0.8 ~ 0.95, burning generates nitrogen oxide, and all the other fuel of 5% ~ 15% is sent into pulverized coal pyrolysis stove 3.
Open the first control valve 5 on pyrolysis oven air inlet duct 4, close the second control valve 13 on cold wind air channel 7 and open the 4th control valve 14 on bypass line 25 simultaneously, First air cold wind is added thermosetting hot blast when flowing through the small oil gun 6 being positioned at elbow, entered in pulverized coal pyrolysis stove 3 by the hot blast after heating by pyrolysis oven air inlet duct 4, the coal dust entered in pulverized coal pyrolysis stove 3 through power transportation pipe 2 from Pulverized Coal Bin 1 is carried out pyrolysis.After pyrolysis, generate pulverized coal pyrolysis mixture comprise the solid products such as semicoke (calling carbon residue in the following text) and pyrolysis synthesis gas.
Pulverized coal pyrolysis mixture is sent in gas-solid separator 12 through thermal decomposition product outlet 11.Carbon residue and pyrolysis synthesis gas after gas-solid separator 12 is separated, pyrolysis synthesis gas through fire again gas pipeline 15 be delivered to be arranged between main burner 18 and fire air nozzle 20 fire gas burner 21 again and burn in the reburning zone spraying into burner hearth 23.The composition of pyrolysis synthesis gas mainly contains CO, H
2, CO
2deng, wherein CO and H
2there is very strong reduction, this pyrolysis synthesis gas is passed into the reburning zone of burner hearth 23 as combustion gas body again, the NOx that primary zone generates can be reduced into N
2, and at burning-out zone after-flame, reach the object of the NOx emission reducing coal-burning boiler unit, the NOx that coal dust firing in burner hearth 23 produces is dropped to the level of environmental requirement discharge.
The carbon residue of pulverized coal pyrolysis mixture after gas-solid separator 12 is separated through carbon residue conveyance conduit 16 enter carbon residue burner 22 to spray into burner hearth 23 in and Secondary Air mixed combustion, after-flame.The carbon residue that produces after pulverized coal pyrolysis burns through spraying into burner hearth 23 at main burner 18 and the carbon residue burner 22 of reducing zone that fires again between gas burner 21, can strengthen reducing atmosphere further, realize the function that the degree of depth reduces NOx.
How the boiler controller system illustrating above embodiment below in conjunction with Fig. 1 carries out black furnace when starting when being not activated boiler and external heat source, realize black furnace powder process.
When black furnace starts, close the first control valve 5, the 4th control valve 14 and the 5th control valve 9, open the second control valve 13, cold wind is added thermosetting hot blast in time being installed in the small oil gun 6 of elbow, reached coal pulverizer 19 by the hot blast after heating to work required temperature, then enter coal pulverizer 19 and grind coal dust, the coal dust ground enters main burner 18 through the second power transportation pipe 17 and sprays into burner hearth 23 and burn, and drives boiler controller system to start.
After boiler controller system normally starts, fire box temperature raises, stove cigarette temperature raises, the hot blast temperature of First air after air preheater heating can meet the requirement of coal pulverizer, the second control valve 13 can be closed, open the 5th control valve 9 and the 4th control valve 14, by the adjustment of First air hot blast and cold wind, make mixed wind-warm syndrome reach the requirement of coal pulverizer 19.Open the first control valve 5 simultaneously, enter pulverized coal pyrolysis stove 3 pairs of coal dusts by pyrolysis oven air inlet duct 4 after cold wind after small oil gun 6 heats reaches uniform temperature and carry out pyrolysis generation pyrolysis gas, the low NOx system of bonded boiler unit reduces the discharge of boiler controller system NOx, thus reaches a set of small oil gun 6 and realize multi-purpose object.
Known according to above description, the above embodiment tool of the utility model has the following advantages:
1, small oil gun can make coal pulverizer reach temperature needed for powder process when boiler controller system cold start, again can when boiler controller system normally runs for pulverized coal pyrolysis stove provides pyrolysis institute calorific requirement, there is provided suitable reburning fuel for implementing reburning technology, thus reduce boiler controller system NOx emission.
2, the thermal source needed for pulverized coal pyrolysis stove comes from the hot blast after small oil gun heating, relative to smoking, impurity stove is less, and this system need not be installed and smoked stove blower fan, avoid with when smoking stove blower fan extraction boiler controller system afterbody heat smoke, dust in heat smoke and flue gas causes smokes stove fan trouble, affects the NOx emission of boiler controller system.
3, utilize pyrolysis synthesis gas that the NOx produced in boiler controller system combustion process is down to the level of environmental requirement, initial outlay and the operating cost of flue gas denitrification system SCR equipment can be reduced.
4, realize, on pyrolysis fire coal and black furnace powder process basis double-duty, because small oil gun can come into operation for a long time, the small oil gun because causing when small oil gun is stopped using also can being avoided to block at a set of small oil gun.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (10)
1. a boiler controller system, comprise body of heater (24), main burner (18), fire gas burner (21) again, hot air duct (10) and coal pulverizer (19), it is characterized in that, described boiler controller system also comprises pulverized coal pyrolysis stove (3), cold air duct (7) and small oil gun (6), the outlet of described pulverized coal pyrolysis stove (3) is communicated with the burner hearth (23) of described body of heater (24) by the described gas burner (21) that fires again, the outlet of described coal pulverizer (19) is communicated with described burner hearth (23) by described main burner (18), described hot air duct (10) is communicated with the entrance of described coal pulverizer (19), described small oil gun (6) is arranged on described cold air duct (7) and goes up and make the cold wind in described cold air duct (7) change hot blast in described cold air duct (7) combustion, wherein, described cold air duct (7) is switchably communicated with described hot blast to be delivered to described pulverized coal pyrolysis stove (3) or described coal pulverizer (19) with described pulverized coal pyrolysis stove (3) with described hot air duct (10).
2. boiler controller system according to claim 1, it is characterized in that, described boiler controller system also comprises gas-solid separator (12), described gas-solid separator (12) comprises the outlet of entrance, gas vent and carbon residue, the outlet of described pulverized coal pyrolysis stove (3) is communicated with the entrance of described gas-solid separator (12), and described gas vent is communicated with described burner hearth (23) by the described gas burner (21) that fires again.
3. boiler controller system according to claim 2, is characterized in that, described boiler controller system also comprises carbon residue burner (22), and described carbon residue outlet is communicated with described burner hearth (23) by described carbon residue burner (22).
4. boiler controller system according to claim 3, it is characterized in that, described carbon residue burner (22) is arranged at the downstream of described main burner (18), describedly fires the downstream that gas burner (21) is arranged at described carbon residue burner (22) again.
5. boiler controller system according to any one of claim 1 to 4, it is characterized in that, the port of export of described cold air duct (7) is connected with described hot air duct (10), described boiler controller system also comprises pyrolysis oven air inlet duct (4), first control valve (5) and the second control valve (13), the arrival end of described pyrolysis oven air inlet duct (4) is connected with described cold air duct (7), the port of export of described pyrolysis oven air inlet duct (4) is connected with described pulverized coal pyrolysis stove (3), described first control valve (5) is arranged on described pyrolysis oven air inlet duct (4), described second control valve (13) is arranged at described cold air duct (7) and goes up and between the arrival end being positioned at described pyrolysis oven air inlet duct (4) and the port of export of described cold air duct (7).
6. boiler controller system according to claim 5, it is characterized in that, described boiler controller system also comprises the 3rd control valve (8), and described 3rd control valve (8) is arranged at described cold air duct (7) and goes up and be positioned between the arrival end of described cold air duct (7) and the arrival end of described pyrolysis oven air inlet duct (4).
7. boiler controller system according to claim 6, is characterized in that, described small oil gun (6) is positioned between described 3rd control valve (8) and the arrival end of described pyrolysis oven air inlet duct (4).
8. boiler controller system according to claim 7, it is characterized in that, described boiler controller system also comprises by-pass line (25) and the 4th control valve (14), the arrival end of described by-pass line (25) is connected with described cold air duct (7) respectively with the port of export, and the arrival end of described by-pass line (25) is positioned between described small oil gun (6) and described 3rd control valve (8), the port of export of described by-pass line (25) is positioned between the port of export of described second control valve (13) and described cold air duct (7), described 4th control valve (14) is arranged on described by-pass line (25).
9. boiler controller system according to claim 8, it is characterized in that, described boiler controller system also comprises the 5th control valve (9), and described 5th control valve (9) is arranged at described hot air duct (10) and goes up and the upstream being positioned at the port of export of described cold air duct (7).
10. boiler controller system according to claim 9, is characterized in that, described first control valve (5) and described second control valve (13) are stop valve; Described 3rd control valve (8), described 4th control valve (14) and described 5th control valve (9) are control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520128861.8U CN204611743U (en) | 2015-03-06 | 2015-03-06 | Boiler controller system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520128861.8U CN204611743U (en) | 2015-03-06 | 2015-03-06 | Boiler controller system |
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| CN204611743U true CN204611743U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520128861.8U Withdrawn - After Issue CN204611743U (en) | 2015-03-06 | 2015-03-06 | Boiler controller system |
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| CN (1) | CN204611743U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351963A (en) * | 2015-11-24 | 2016-02-24 | 西安航天源动力工程有限公司 | Low-nitrogen combustion device based on brown coal |
| CN105485666A (en) * | 2015-12-29 | 2016-04-13 | 冯伟铭 | High-temperature gasification compound combustion system for coal-fired steam boiler |
| CN105987379A (en) * | 2015-03-06 | 2016-10-05 | 烟台龙源电力技术股份有限公司 | Boiler unit |
| CN108343950A (en) * | 2018-03-30 | 2018-07-31 | 烟台龙源电力技术股份有限公司 | Coal dust pretreatment unit and boiler |
| CN109127104A (en) * | 2018-09-13 | 2019-01-04 | 华润电力湖南有限公司 | Coal pulverizer and its coal pulverizer hot air duct |
-
2015
- 2015-03-06 CN CN201520128861.8U patent/CN204611743U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987379A (en) * | 2015-03-06 | 2016-10-05 | 烟台龙源电力技术股份有限公司 | Boiler unit |
| CN105987379B (en) * | 2015-03-06 | 2018-09-14 | 烟台龙源电力技术股份有限公司 | Boiler controller system |
| CN105351963A (en) * | 2015-11-24 | 2016-02-24 | 西安航天源动力工程有限公司 | Low-nitrogen combustion device based on brown coal |
| CN105485666A (en) * | 2015-12-29 | 2016-04-13 | 冯伟铭 | High-temperature gasification compound combustion system for coal-fired steam boiler |
| CN105485666B (en) * | 2015-12-29 | 2019-03-08 | 冯伟铭 | High-temperature gasification compound combustion system for coal-fired steam boiler |
| CN108343950A (en) * | 2018-03-30 | 2018-07-31 | 烟台龙源电力技术股份有限公司 | Coal dust pretreatment unit and boiler |
| CN108343950B (en) * | 2018-03-30 | 2024-04-16 | 烟台龙源电力技术股份有限公司 | Pulverized coal pretreatment device and boiler |
| CN109127104A (en) * | 2018-09-13 | 2019-01-04 | 华润电力湖南有限公司 | Coal pulverizer and its coal pulverizer hot air duct |
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