CN203258673U - Cross-coal type separate grinding blending combustion device of W-shaped flame boiler - Google Patents
Cross-coal type separate grinding blending combustion device of W-shaped flame boiler Download PDFInfo
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- CN203258673U CN203258673U CN 201320233598 CN201320233598U CN203258673U CN 203258673 U CN203258673 U CN 203258673U CN 201320233598 CN201320233598 CN 201320233598 CN 201320233598 U CN201320233598 U CN 201320233598U CN 203258673 U CN203258673 U CN 203258673U
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Abstract
The utility model provides a cross-coal type separate grinding blending combustion device of a W-shaped flame boiler. The cross-coal type separate grinding blending combustion device of the W-shaped flame boiler comprises a flame boiler body, a hearth arranged in the flame boiler body, and a big air box arranged on the flame boiler body. A combustion chamber is arranged below the hearth. A first large-proportion mixed coal blending combustion coal mill is arranged on one side of the flame boiler body. A second large-proportion mixed coal blending combustion coal mill is arranged on the other side of the flame boiler body. An on-arch tuyere and an under-arch tuyere are arranged in the flame boiler body. A pulverized coal burner is arranged on the flame boiler body. The flame boiler body is connected to an exhaust gas nozzle which is connected to a pulverized coal separator. The cross-coal type separate grinding blending combustion device of the W-shaped flame boiler is low in fuel consumption and coking and safe to use, saves energy and protects the environment.
Description
Technical field
The utility model belongs to the power industry technical field, is specifically related to a kind of W type flame boiler and strides coal and divide the mill mingled burning installation.
Background technology
The Yangcheng Power Plant boiler is U.S.'s Foster---pressure that Wheeler provides is critical, resuperheat, arch form list burner hearth W flame, balanced draft, dry ash extraction, arrange in the open, Natural Circulation drum type coal-burning boiler, have 6.The boiler air and flue system is furnished with two trisector air heaters, two Rotar Blade-Adjustable Axial Forced Draft Fans, two Blade Adjustable Axial streaming air-introduced machines; Secondary Air adopts the air stage feeding mode, by the different baffle controls air quantity in the upper secondary air box of going in ring of burner hearth arch.Pulverized coal preparation system is double-inlet and double-outlet steel ball mill pressurized direct pulverizing coal system, is furnished with four coal pulverizers, two inlet guide vanes are regulated centrifugal primary air fan, and coal burner adopts bispin air duct coal dust separate type burner.According to design, can grind coefficient at burning Ha Shi is 55, and when caloric value was about the Jincheng Anthracite of 6100kcal/kg, three coal pulverizer operations can reach 350MW, and another coal pulverizer is for subsequent use.The coal of the actual use of Yangcheng Power Plant mainly be Ha Shi can to grind coefficient be 38 Jincheng Anthracite, the about 5500～6000kcal/kg of caloric value.When using this coal, coal pulverizer exposes type selecting problem less than normal, and boiler just needs to throw oil more than 310MW combustion-supporting, and the content of fly ash combustible material is greatly about 20～40%, the combustible content of large slag is 10～60%, and especially the total amount of large slag is also very large when high load capacity.
Electric coal was in short supply in 2010, particularly local anthracite price is high, and supply can't satisfy, and ature of coal declines to a great extent, add coal pulverizer type selecting reason less than normal, boiler catches fire unstable, and fly ash combustible material is high, and boiler efficiency is low, add that to use coal off-design coal more, the pulverized coal preparation system undercapacity is often put out a fire in the time of with high load capacity, needs a large amount of steady combustions of oil of throwing.
The utility model content
The technical problems to be solved in the utility model provides a kind of W type flame boiler and strides coal and divide the mill mingled burning installation, solves the problems such as existing equipment starts oil consumption and combustion-supporting oil consumption is large, and coking is many, and is seriously polluted.
For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of W type flame boiler to stride coal to divide the mill mingled burning installation, comprise the flame boiler body, and be arranged on the intrinsic burner hearth of flame boiler, and be arranged on large bellows on the flame boiler body, described burner hearth below is provided with the combustion chamber, described flame boiler body one side is provided with first ratio mixed coal combustion coal pulverizer, described flame boiler body opposite side is provided with second largest ratio mixed coal combustion coal pulverizer, be provided with the lower air port of arch uptake and arch in the described flame boiler body, described flame boiler body is provided with coal burner, described flame boiler body is connected with weary gas blowout mouth, and described weary gas blowout mouth is connected with coal dust classifier.
Described coal burner is the cyclone formula coal burner with deep or light separation function.
Described arch uptake all links to each other with large bellows with the lower air port of arch, and by large bellows air distribution.
Flame is the W type in the described burner hearth.
The beneficial effect of technique scheme of the present utility model is as follows:
In the such scheme, greatly improved the unit efficiency of combustion, entered in the satisfied situation of stove coal calorific value, can not throw the oil band at full capacity, boiler efficiency improves, and fly ash combustible material decline has significantly reduced unit starting oil consumption and combustion-supporting oil consumption.Help fuel oil to reduce approximately 5224 ton/years; The cold start average fuel consumption reduces by 65.6 tons/time, and the hot starting, hot start average fuel consumption reduces by 34 tons/time; About 6519 ton/years of year fuel-economizing is compared stokehold belt premix and has been slowed down boiler coke, the nitrogen oxide 600mg/Nm that approximately descended
3Can adjust at any time the discharging of boiler sulphur, guarantee not discharge beyond standards, guarantee the security of pulverized coal preparation system, reduced fineness of pulverized coal, divide mill to mix and burn when comparing stokehold belt premix, pure burning anthracite, coal dust is the thinnest, and upper coal technique is simple, bituminous coal ratio flexible adjustment in service is timely, the unit hot starting, hot start also can adopt bituminous coal to start, and has satisfied the shutoff of desulfurization by-pass damper, the requirement that the desulphurization system random groups puts into operation synchronously.
Description of drawings
Fig. 1 is that W type flame boiler of the present utility model is striden coal and divided the structural representation that grinds mingled burning installation.
［ main element symbol description ］
1, flame boiler body;
2, burner hearth;
3, large bellows;
4, combustion chamber;
5, first ratio mixed coal combustion coal pulverizer;
6, second largest ratio mixed coal combustion coal pulverizer;
7, arch uptake;
8, the lower air port of arch;
9, coal burner;
10, weary gas blowout mouth;
11, coal dust classifier.
The specific embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The problems such as the utility model is large for existing device start oil consumption and combustion-supporting oil consumption, and coking is many, and is seriously polluted provide a kind of W type flame boiler to stride coal and divide the mill mingled burning installation.
As shown in Figure 1, embodiment of the present utility model provides a kind of W type flame boiler to stride coal to divide the mill mingled burning installation, comprise flame boiler body 1, and be arranged on burner hearth 2 in the flame boiler body 1, and be arranged on large bellows 3 on the flame boiler body 1, described burner hearth 2 belows are provided with combustion chamber 4, described flame boiler body 1 one sides are provided with first ratio mixed coal combustion coal pulverizer 5, described flame boiler body 1 opposite side is provided with second largest ratio mixed coal combustion coal pulverizer 6, be provided with the lower air port 8 of arch uptake 7 and arch in the described flame boiler body 1, described flame boiler body 1 is provided with coal burner 9, described flame boiler body 1 is connected with weary gas blowout mouth 10, and described weary gas blowout mouth 10 is connected with coal dust classifier 11.
Described coal burner 9 is for having the cyclone formula coal burner of deep or light separation function.
Described arch uptake 7 all links to each other with large bellows 3 with the lower air port 8 of arch, and by large bellows 3 air distributions.
Flame is the W type in the described burner hearth.
Further, described arch uptake, the lower air port of arch, coal burner, weary gas blowout mouth, coal dust classifier and large bellows are equipped with two, and symmetry is installed in flame boiler body both sides.
Further, boiler is equipped with 4 coal pulverizers, and two coal pulverizers are in boiler one side, and two coal pulverizers are at the boiler opposite side.The bituminous coal ratio is 40%～80% mixed coal on coal pulverizer of each side selection, pure anthracite on other two coal pulverizers.The mixed coal ratio is to enter factory's ature of coal and adjust according to actual, and the major control index is to enter factory's coal amount etc. into stove coal volatile matter, sulphur content, discharged nitrous oxides, each coal.The anthracite that mixes small scale in the bituminous coal of 2 coal pulverizers can reduce the inflammable and explosive danger of bituminous coal, and tentatively controls the ratio that integral body enters stove bituminous coal by mixing anthracitic ratio.
Further, in order to guarantee the safety of pulverized coal preparation system, the disintegrating outlet temperature of upper mixed coal is controlled at 95 ℃, is lower than upper anthracitic mill; Volatile matter is controlled at about 21%, and single coal bituminous coal volatile matter is no more than 30% substantially about 25%.But if there is single coal volatile matter reach 35% and more than, then the disintegrating outlet temperature suitably to be reduced, is no more than 250 ℃ and is as the criterion to be grinding into a mouthful temperature, and the proportion that the bituminous coal of volatile matter more than 35% accounts for total coal amount is no more than 5%.
Further, at unit DCS control system fuel main menu, increased the pulverizer capacity adjustment block, throw in the automatic situation at coal pulverizer, adjust exerting oneself of each mill, reach the purpose that change integral body enters stove bituminous coal ratio, according to fugitive constituent needs, environmental protection needs, adjust at any time.Setting value piece setting range is-20%～+ 20%, namely maximumly reduces by 20% exert oneself or increase 20% exert oneself.
Further, during the coal pulverizer start and stop of upper mixed coal, control coal pulverizer outlet temperature is only thrown cold wind below 70 ℃ during start and stop, do not throw hot blast.
Further, in order to control boiler coke, the bituminous coal mixed-fuel burning proportion of coking is controlled in 10% easily, and the burner of the mixed coal that will burn is evenly distributed in the burner hearth, avoids concentrating on a certain zone, causes local seriously coking.
Further, during boiler startup the coal pulverizer of upper mixed coal is all gone up bituminous coal, improve volatile matter, be conducive to the burning of coal dust in the very low situation of furnace temperature, reduce the machine that opens with oily.Behind unit tripping, in the hot starting, hot start, the coal pulverizer of mixed coal starts rapidly unit in the utilization, recovers unit and normally moves.
Further, the coal pulverizer that uses different atures of coal is adjusted targetedly.
The beneficial effects of the utility model have: 1. simple in structure, easy to use, simple to operate; 2. do not throw the oil band at full capacity, fly ash combustible material descends, and has reduced unit starting oil consumption and combustion-supporting oil consumption; 3. slow down coking is polluted few, safe and reliable.
The above is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a W type flame boiler is striden coal and is divided the mill mingled burning installation, it is characterized in that: comprise the flame boiler body, and be arranged on the intrinsic burner hearth of flame boiler, and be arranged on large bellows on the flame boiler body, described burner hearth below is provided with the combustion chamber, described flame boiler body one side is provided with first ratio mixed coal combustion coal pulverizer, described flame boiler body opposite side is provided with second largest ratio mixed coal combustion coal pulverizer, be provided with the lower air port of arch uptake and arch in the described flame boiler body, described flame boiler body is provided with coal burner, described flame boiler body is connected with weary gas blowout mouth, and described weary gas blowout mouth is connected with coal dust classifier.
2. W type flame boiler according to claim 1 is striden coal and is divided the mill mingled burning installation, it is characterized in that described coal burner is the cyclone formula coal burner with deep or light separation function.
3. W type flame boiler according to claim 1 is striden coal and is divided the mill mingled burning installation, it is characterized in that, described arch uptake all links to each other with large bellows with the lower air port of arch, and passes through large bellows air distribution.
4. W type flame boiler according to claim 1 is striden coal and is divided the mill mingled burning installation, it is characterized in that, flame is the W type in the described burner hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320233598 CN203258673U (en) | 2013-04-29 | 2013-04-29 | Cross-coal type separate grinding blending combustion device of W-shaped flame boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320233598 CN203258673U (en) | 2013-04-29 | 2013-04-29 | Cross-coal type separate grinding blending combustion device of W-shaped flame boiler |
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| CN203258673U true CN203258673U (en) | 2013-10-30 |
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| CN 201320233598 Expired - Fee Related CN203258673U (en) | 2013-04-29 | 2013-04-29 | Cross-coal type separate grinding blending combustion device of W-shaped flame boiler |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180365A (en) * | 2014-08-29 | 2014-12-03 | 国家电网公司 | Blending combustion method of W-flame boiler using large-difference coal types |
| CN106016356A (en) * | 2016-05-24 | 2016-10-12 | 中国大唐集团科学技术研究院有限公司西北分公司 | Ignition method of W-shaped boiler |
| CN106090901A (en) * | 2016-06-01 | 2016-11-09 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of coal dust mixed burning method for W type flame boiler |
| CN109433398A (en) * | 2018-10-24 | 2019-03-08 | 大唐湘潭发电有限责任公司 | Bin storage type pulverizing system boiler residual powder booting fuel saving method |
| CN110319435A (en) * | 2019-07-01 | 2019-10-11 | 华能沁北发电有限责任公司 | A kind of wall firing boiler mixed coal combustion optimization method |
| CN111895392A (en) * | 2020-07-21 | 2020-11-06 | 新疆天富能源股份有限公司 | Coal fired power plant direct current burner suitable for coal-mixed combustion |
| CN114110570A (en) * | 2021-11-01 | 2022-03-01 | 哈尔滨工业大学 | W flame boiler capable of flexibly adjusting peak by using reserved coal bunker and boiler peak adjusting method |
-
2013
- 2013-04-29 CN CN 201320233598 patent/CN203258673U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180365A (en) * | 2014-08-29 | 2014-12-03 | 国家电网公司 | Blending combustion method of W-flame boiler using large-difference coal types |
| CN106016356A (en) * | 2016-05-24 | 2016-10-12 | 中国大唐集团科学技术研究院有限公司西北分公司 | Ignition method of W-shaped boiler |
| CN106016356B (en) * | 2016-05-24 | 2018-05-18 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of W types ignition of the boiler method |
| CN106090901A (en) * | 2016-06-01 | 2016-11-09 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of coal dust mixed burning method for W type flame boiler |
| CN109433398A (en) * | 2018-10-24 | 2019-03-08 | 大唐湘潭发电有限责任公司 | Bin storage type pulverizing system boiler residual powder booting fuel saving method |
| CN110319435A (en) * | 2019-07-01 | 2019-10-11 | 华能沁北发电有限责任公司 | A kind of wall firing boiler mixed coal combustion optimization method |
| CN110319435B (en) * | 2019-07-01 | 2021-12-31 | 华能沁北发电有限责任公司 | Optimization method for mixed coal blending combustion of wall type combustion boiler |
| CN111895392A (en) * | 2020-07-21 | 2020-11-06 | 新疆天富能源股份有限公司 | Coal fired power plant direct current burner suitable for coal-mixed combustion |
| CN114110570A (en) * | 2021-11-01 | 2022-03-01 | 哈尔滨工业大学 | W flame boiler capable of flexibly adjusting peak by using reserved coal bunker and boiler peak adjusting method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20150429 |
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| EXPY | Termination of patent right or utility model |