CN208124256U - A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater - Google Patents

A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater Download PDF

Info

Publication number
CN208124256U
CN208124256U CN201820488488.0U CN201820488488U CN208124256U CN 208124256 U CN208124256 U CN 208124256U CN 201820488488 U CN201820488488 U CN 201820488488U CN 208124256 U CN208124256 U CN 208124256U
Authority
CN
China
Prior art keywords
grey
reversal chamber
alkali
burner hearth
flue
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.)
Active
Application number
CN201820488488.0U
Other languages
Chinese (zh)
Inventor
朱文兵
罗俊伟
杨文海
王大伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Wu Pan Energy Engineering Co Ltd
Original Assignee
Wuhan Wu Pan Energy Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuhan Wu Pan Energy Engineering Co Ltd filed Critical Wuhan Wu Pan Energy Engineering Co Ltd
Priority to CN201820488488.0U priority Critical patent/CN208124256U/en
Application granted granted Critical
Publication of CN208124256U publication Critical patent/CN208124256U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model relates to a kind of high-alkali grey pulverized-coal fired boilers of clean burn without reheater, belong to boiler plant technical field.Including burner hearth, the burner hearth bottom is equipped with low NO, top is equipped with pendant superheater, the burner hearth is sequentially communicated the first reversal chamber, the second reversal chamber and flue, the flue tail end connects air preheater, setting high temperature superheater and low temperature superheater in first reversal chamber, second reversal chamber is interior to be arranged economizer, and SCR reactor is arranged in the flue.The utility model improves frequency of soot blowing, soot blowing intensity, and bonding ash is avoided to block convection heating surface, guarantees boiler safe and stable operation at full capacity.

Description

A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater
Technical field
The utility model relates to boiler plant technical fields, and in particular to a kind of high-alkali grey coal dust of clean burn without reheater Boiler.High-alkali grey pulverized-coal fired boiler suitable for 35t/h~670t/h evaporation capacity (without reheating).
Background technique
Since existing some coalfield alkali metal contents are high, easily slagging and contamination when burning has seriously affected unit Security reliability constrains its large-scale application.And have that higher moisture, medium calorific capacity, coal quality bulk density be small, Yi Zhe The features such as fire, easy to burn out, strong coking, high basic metal content, strong contamination.
In order to guarantee the stable operation of boiler, most of operation forms be mix in the feed burn high ash melting point coal it is (or high Ridge soil) or load down operation.But it cannot achieve 100% clean burn, 100% load operation.The main reason is that smoke temperature is by 800 DEG C 600 DEG C are down to, Na2O and K2The alkali metal such as O condensation ash is bonded in convection heating surface region, and grey viscosity is high, and soot blowing effect is unknown Aobvious, convection channel blocks, and boiler is unable to operate normally.
Utility model content
The purpose of this utility model provides a kind of high sode ash of the clean burn without reheater aiming at the defect of the prior art Pulverized-coal fired boiler.
The technical solution adopted in the utility model is:Including burner hearth, the burner hearth bottom is equipped with low NO, and top is set There is pendant superheater, the burner hearth is sequentially communicated the first reversal chamber, the second reversal chamber and flue, and the flue tail end connects air Preheater, the interior setting high temperature superheater of first reversal chamber and low temperature superheater, second reversal chamber is interior to be arranged economizer, SCR reactor is arranged in the flue Inner.
Further preferred structure, the burner hearth bottom are equipped with the first ash bucket, the first reversal chamber, the second reversal chamber bottom point It She You not the second ash bucket and third ash bucket.
Further preferred structure, the pipeline between second reversal chamber and flue include first horizontal segment, ascent stage With the second horizontal segment, the first horizontal segment, ascent stage and the second horizontal segment are sequentially connected, and second horizontal segment cross section is big In first horizontal segment cross section.
Height is equipped on the convection heating surface pipe of further preferred structure, the high temperature superheater and low temperature superheater The corrosion resistant hot superconduction enamel paint layer of temperature.
Further preferred structure, the burner hearth are rectangular.
Enter after the high-alkali grey coal dust of the utility model and hot-air mixing abundant in rectangular big burner hearth after low NO Burning, smoke temperature is down to 800 DEG C after flue gas is arranged at the pendant superheater of upper furnace.In 800 DEG C~600 DEG C cooling sections In, flue gas parallel baffled high temperature superheater, low temperature superheater, and ash bucket is set in this region, ash will be condensed smoothly by soot blowing Ground discharge guarantees that boiler can be run steadily in the long term.Meanwhile high temperature superheater, low temperature superheater are sprayed using thermal conductivity enamel, are protected Card condensation ash can smoothly fall off from superheater tube wall after soot blowing.
Using the high-alkali grey pulverized-coal fired boiler of the utility model clean burn, following beneficial effect can be generated.(1) high-alkali grey coal dust is fired through low nitrogen After burning, emission of NOx of boiler<300mg/Nm3, reduce tail portion SCR region domain environmental protection cost;(2) rectangular big burner hearth uses lower furnace Thorax volume heat load and section thermic load, alleviate the coking of burner and burner hearth, reduce the labor intensity of artificial coke cleaning; (3) flue gas parallel baffled high temperature superheater and low temperature superheater, while the pitch of superheater is increased to by traditional 100mm 300mm reduces a possibility that condensation ash is put up a bridge;Water cooling ash bucket is arranged in superheater area simultaneously, by improving frequency of soot blowing, blowing Grey intensity avoids bonding ash from blocking convection heating surface, guarantees boiler safe and stable operation at full capacity;(4) superheater convection current by The corrosion resistant hot superconduction enamel paint of spraying high temperature on hot facial canal, mitigate convection heating surface on dust stratification, improve convection current by The heat-transfer capability in hot face.
Detailed description of the invention
Fig. 1 is the utility model structure diagram;
In figure, 1- burner hearth, 2- low NO, 3- pendant superheater, 4- high temperature superheater, 5- low temperature superheater, 6- province Coal device, 7-SCR reactor, 8- air preheater, the first ash bucket of 9-, the second ash bucket of 10-, 11- third ash bucket, 12- first are turned to Room, the second reversal chamber of 13-, 14- flue, 15- first horizontal segment, 16- ascent stage, the second horizontal segment of 17-.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, convenient for being well understood The utility model, but they do not constitute the utility model and limit.
As shown in Figure 1, the utility model includes burner hearth 1,1 bottom of burner hearth is equipped with low NO 2, and top is equipped with screen Formula superheater 3, the burner hearth 1 are sequentially communicated the first reversal chamber 12, the second reversal chamber 13 and flue 14, and 14 tail end of flue connects Connect air preheater 8, setting high temperature superheater 4 and low temperature superheater 5 in first reversal chamber 12, second reversal chamber Economizer 6 is set in 13, SCR reactor 7 is set in the flue 14.
1 bottom of burner hearth is equipped with the first ash bucket 9, and the first reversal chamber 12,13 bottom of the second reversal chamber are respectively equipped with second Ash bucket 10 and third ash bucket 11.
Pipeline between second reversal chamber 13 and flue 14 includes first horizontal segment 15, ascent stage 16 and the second water Flat section 17, the first horizontal segment 15, ascent stage 16 and the second horizontal segment 17 are sequentially connected, and second horizontal segment 17 is transversal Face is greater than 15 cross section of first horizontal segment.
The heat that high temperature corrosion-resisting is equipped on the convection heating surface pipe of the high temperature superheater 4 and low temperature superheater 5 is super Lead enamel paint layer.
The burner hearth 1 is rectangular.
The utility model burner hearth uses rectangular big burner hearth, chooses the volumetric loading and section thermic load of lower burner hearth;It is low Nitrogen burner uses corner firing arrangement form, and SOFA wind (separation burnout degree) is arranged in above main burner, divides two layers of cloth It sets.It is pre- that flue gas successively passes through pendant superheater, high temperature superheater, low temperature superheater, economizer, SCR device, rotary air It is discharged after hot device laggard dedusting, desulfurization excessively.
The utility model specific work process:After high-alkali ash coal dust is by being arranged in the processing of stokehold medium-speed milling pulverization system, by It is sent into the low NO 2 of 1 four jiaos of burner hearth arrangements by the hot-air of air preheater 8;Flue gas, which sequentially enters, is arranged in furnace The pendant superheater 3 on 1 top of thorax, parallel baffled high temperature superheater 4 and low temperature superheater 5, in high temperature superheater 4 and cryogenic overheating It is equipped with dry bottom hopper (the second ash bucket 10) below device 5, the condensation ash for generation of burning can be in dry bottom hopper region normal discharge;High temperature simultaneously Superheater 4 and 5 coiled pipe of low temperature superheater are sprayed using thermal conductivity enamel paint, and about 600 DEG C of flue gas is cooled to through economizer 6 After entering 7 region of SCR reactor after 390 DEG C, NOx discharge to 50mg/Nm3Below;Flue gas after denitration is through air preheat After device 8, about 140 DEG C of exhaust gas temperature, guarantee 91% or more boiler efficiency.
After boiler feedwater enters economizer heating, subsequently into drum, by down-comer below drum and by several dispersion pipes Furnace wall cooling lower header is introduced, water supply is absorbed heat along burner hearth surrounding water-cooling wall generates saturated vapor;Water cooled wall upper collecting chamber is drawn Enter drum after pipe.Saturated vapor in drum enters low temperature superheater 5 after secondary separation, enters after level-one desuperheat and is located at Pendant superheater 3 above burner hearth, then enter high temperature superheater 4 after second level attemperator, qualified steam is through main steam line It send to steam turbine power generation.
Cold air is sent into air preheater 8 by primary air fan and secondary air fan, and First air is as drying and conveys high sode ash Coal dust uses;70% is sent directly into burner hearth 1 by main burner overfiren air port in Secondary Air, and in addition 30% passes through as burnt wind Burner hearth 1 is sent into the air port SOFA.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.

Claims (5)

1. a kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater, including burner hearth (1), which is characterized in that burner hearth (1) bottom Portion be equipped with low NO (2), top be equipped with pendant superheater (3), the burner hearth (1) be sequentially communicated the first reversal chamber (12), Second reversal chamber (13) and flue (14), flue (14) tail end connect air preheater (8), first reversal chamber (12) Interior setting high temperature superheater (4) and low temperature superheater (5), second reversal chamber (13) is interior to be arranged economizer (6), the flue (14) SCR reactor (7) are set in.
2. a kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater according to claim 1, which is characterized in that the furnace Thorax (1) bottom is equipped with the first ash bucket (9), and the first reversal chamber (12), the second reversal chamber (13) bottom are respectively equipped with the second ash bucket (10) and third ash bucket (11).
3. a kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater according to claim 1, which is characterized in that described the Pipeline between two reversal chambers (13) and flue (14) includes first horizontal segment (15), ascent stage (16) and the second horizontal segment (17), the first horizontal segment (15), ascent stage (16) and the second horizontal segment (17) are sequentially connected, second horizontal segment (17) Cross section is greater than first horizontal segment (15) cross section.
4. a kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater according to claim 1, which is characterized in that the height The hot superconduction enamel paint of high temperature corrosion-resisting is equipped on the convection heating surface pipe of warm superheater (4) and low temperature superheater (5) Layer.
5. a kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater according to claim 1, which is characterized in that the furnace Thorax (1) is rectangular.
CN201820488488.0U 2018-04-03 2018-04-03 A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater Active CN208124256U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820488488.0U CN208124256U (en) 2018-04-03 2018-04-03 A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820488488.0U CN208124256U (en) 2018-04-03 2018-04-03 A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater

Publications (1)

Publication Number Publication Date
CN208124256U true CN208124256U (en) 2018-11-20

Family

ID=64194821

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820488488.0U Active CN208124256U (en) 2018-04-03 2018-04-03 A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater

Country Status (1)

Country Link
CN (1) CN208124256U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325307A (en) * 2020-11-17 2021-02-05 中晟工程技术(天津)有限公司 Rapid cooler of sintering flue gas incinerator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325307A (en) * 2020-11-17 2021-02-05 中晟工程技术(天津)有限公司 Rapid cooler of sintering flue gas incinerator

Similar Documents

Publication Publication Date Title
CN207975627U (en) It is suitable for using the 660MW grade ultra-supercritical boilers of high alkalinity coal
CN110220198A (en) A kind of high temperature and pressure waste incineration horizontal boiler
CN111140833A (en) Circulating fluidized bed boiler structure with cooling chamber and capable of burning mixed fuel
CN102840592A (en) Low-temperature smoke recirculation system
CN208124256U (en) A kind of high-alkali grey pulverized-coal fired boiler of clean burn without reheater
CN108036298A (en) A kind of garbage burning boiler steam reheat system
CN110220182A (en) A kind of biomass direct-fired energy-saving circulating fluidized bed superhigh-pressure high-temp reheated steam boiler
CN102966944B (en) CFB (Circulating Fluidized Bed)-rotary radiation boiler for reducing contamination of high-alkalinity coal
CN110360569A (en) A kind of high temperature and pressure garbage burning boiler
CN207378803U (en) A kind of garbage burning boiler superheater system
CN109506231A (en) Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler steam/water circulating integrated morphology
CN206112970U (en) Circulating fluidized bed boiler unit based on put out sediment technique futilely
CN105485894A (en) Pulverized coal type water heating boiler
CN210035474U (en) Low-dust flue gas generation device for burning pyrolysis waste coke
CN104121595B (en) Rapid cooling type smoke mixing chamber device
CN111981469A (en) Flue gas recirculation system for ultra-supercritical secondary reheating boiler
CN205579960U (en) Buggy boiler
CN208670987U (en) Suitable for using the medium-pressure boiler of the quasi- eastern coal in Xinjiang
CN108916864A (en) The supercritical carbon dioxide cyclone furnace of nitrogen oxides is reduced based on high temperature reduction area spray ammonia
CN203687352U (en) Energy-saving environment-friendly boiler barrel longitudinally-arranged inclined push reciprocating grate hot water boiler
CN209279187U (en) Use the smoke discharging device of the bagasse biomass fuel boiler of dry method dust
CN203731362U (en) Detachable vapor generator
CN106287680A (en) Small-sized biomass shaped fuel recirculating fluidized bed steam boiler
CN205535709U (en) Flue waste heat utilization system
CN212777312U (en) Flue gas recirculation system for ultra-supercritical secondary reheating boiler

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant