CN105444144B - For using the 300MWCFB boilers and layout method of oil shale - Google Patents

For using the 300MWCFB boilers and layout method of oil shale Download PDF

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Publication number
CN105444144B
CN105444144B CN201510983680.8A CN201510983680A CN105444144B CN 105444144 B CN105444144 B CN 105444144B CN 201510983680 A CN201510983680 A CN 201510983680A CN 105444144 B CN105444144 B CN 105444144B
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China
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burner hearth
superheater
oil shale
square
enclosure
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CN201510983680.8A
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CN105444144A (en
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姜雪
姜孝国
王君峰
高新宇
王刚
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Harbin Boiler Co Ltd
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Harbin Boiler Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00Fluidised bed combustion apparatus
    • F23C10/02Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
    • F23C10/10Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00Fluidised bed combustion apparatus
    • F23C10/18Details; Accessories
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2206/00Fluidised bed combustion
    • F23C2206/10Circulating fluidised bed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/99004Combustion process using petroleum coke or any other fuel with a very low content in volatile matters

Abstract

The present invention relates to a kind of 300MWCFB boilers for being used to use oil shale.Realize that the maximization of the CFBB of fuel oil shale fuel has become a key subjects of Technology of Circulating Fluidized Bed Boiler development.A kind of 300MWCFB boilers for being used to use oil shale, its composition include:Boiler body, prolonging burner hearth center arrangement directly over square burner hearth has drum(11), the lower section of square burner hearth has slag cooler(9)And Induct burner(10), the central area in square burner hearth internal upper part space is disposed with water-cooling screen(5), high temperature reheater(6)And high temperature superheater(7), square burner hearth both sides have been arranged symmetrically steam-water separator(3), steam-water separator top passes through gas approach(2)It is connected with square burner hearth, steam-water separator bottom passes through material returning valve(8)It is connected with the square thorax of stove, steam-water separator passes through exhaust pass(4)By the cold separator of vapour and afterbody enclosure wall superheater(14)Connection.The present invention is applied to the 300MWCFB boilers for using oil shale.

Description

For using the 300MWCFB boilers and layout method of oil shale
Technical field:
The present invention relates to a kind of 300MWCFB boilers for being used to use oil shale.
Background technology:
China's oil shale reserves are big, and traditional oil shale using energy source technique has that cost is high, utilization rate is low, little particle oil Shale can not be refined oil, and there are about 30% oil shale can not be refined oil, and need to be discharged and be stacked on the spot, be generated extremely serious Environmental pollution, and the comprehensive utilization of oil shale can be realized as the fuel of coal-burning power plant using oil shale, and reduce to environment Pollution, advantageously account for the problems such as fuel is nervous and oil shale is accumulated, there is far-reaching social benefit;Due to pulverized coal preparation system not Reliably, dust stratification, stifled ash, seriously corroded and surely firing the problems such as difficult and exist, oil shale can not be used as the fuel of pulverized-coal fired boiler always, And can be very good to solve the above problems using Combustion technology of circulating fluidized, early in the nineties in last century, existing fuel oil page The small-scale circulating fluidized bed boiler of rock is put into commercial operation, but its efficiency of combustion is low, pollutant discharge amount is higher, therefore, is realized The maximization of the CFBB of fuel oil shale fuel has become a weight of Technology of Circulating Fluidized Bed Boiler development Big problem, the current country there is no the technology of the 300MW CFB boilers of fuel oil shale fuel, before this technology has wide market Scape.
300MW CFB boilers technology is highly developed at present, and at home and foreign countries have obtained substantial amounts of application.Because of oily page Rock abrasiveness is strong, volatile matter is high, easily catch fire, after-flame is difficult, calorific value is low, and burning in stove is had a great influence, set on heavy duty boiler It is also larger to count difficulty, so, using oil shale as the 300MWCFB boiler technologies of fuel, there is presently no Related product.
The content of the invention:
It is an object of the invention to provide a kind of 300MWCFB boilers and its layout method for being used to use oil shale.
Above-mentioned purpose is realized by following technical scheme:
A kind of 300MWCFB boilers for being used to use oil shale, its composition include:Boiler body, before described boiler body Portion is provided with square burner hearth, and prolonging burner hearth center arrangement directly over described square burner hearth has drum, described square burner hearth Lower section has slag cooler and Induct burner, and the central area in described square burner hearth internal upper part space is disposed with water cooling Screen, high temperature reheater and high temperature superheater, described square burner hearth both sides have been arranged symmetrically steam-water separator, described carbonated drink point It is connected from device top by gas approach with square burner hearth, described steam-water separator bottom is connected by material returning valve and the square thorax of stove Connect, described steam-water separator is connected the cold separator of vapour with afterbody enclosure wall superheater by exhaust pass.
The described 300MWCFB boilers for being used to use oil shale, after described enclosure wall superheater is arranged in square burner hearth just Side, described enclosure wall superheater are divided into former and later two flues, and flue is sequentially arranged under upper low before described enclosure wall superheater Warm reheater and economizer A, medium temperature overheater, cryogenic overheating are sequentially arranged from top to bottom in described enclosure wall superheater rear pass Device and economizer B, described enclosure wall superheater lower section are economizer hopper, and described economizer hopper rear connects SCR device, Air preheater is set below described SCR device, and described air preheater is connected by hot-flow flue with square burner hearth, described Air preheater exhanst gas outlet and air intake connect flue gas system respectively.
The described 300MWCFB boilers for being used to use oil shale, described square burner hearth center line and boiler body center Line is overlapped, and described slag cooler is drawn on the left of square burner hearth, and starter is drawn on the right side of square burner hearth under described bed, described Enclosure wall superheater to be square, described enclosure wall superheater center line overlaps with boiler center line.
The described layout method for being used to use the 300MWCFB boilers of oil shale, using H types arrangement, single burner hearth, Dan Bu Aerofoil structure, improves furnace height as far as possible, makes extended residence time of the fuel in burner hearth, ensures that oil shale fuel can be in stove It is fully burned in thorax, it is contemplated that oil shale structure in the form of sheets more, be not easy to the fluidisation of bed, on burner hearth air distribution plate rationally Major diameter bell-shaped blast cap is arranged, its inner tube resistance is reasonable in design, makes cloth wind uniform, makes bed fluidisation evenly.
The described layout method for being used to use the 300MWCFB boilers of oil shale, reheated steam are kept off using afterbody twin flue Plate temperature adjustment, preceding flue arrangement low-temperature reheater and economizer, rear pass arrangement medium temperature overheater, low temperature superheater and economizer, And above heating surface is arranged in Bao Qiang areas, it is arranged symmetrically using the efficient cold separator of Scroll vapour, its separative efficiency is reachable More than 99.99%, the dust content into afterbody Bao Qiang areas substantially reduces, so as to effectively prevent the abrasion of Bao Qiang areas heating surface, Separator is arranged symmetrically, and each separator inlet exhaust gas volumn and inventory are of substantially equal, be easy to ensure separator separating effect and The uniformity of returning charge amount, inner flue gas of the stove and material flow field are also in symmetric form, and evenly, burning diabatic process is easy in stove for flowing Ensure.
The described layout method for being used to use the 300MWCFB boilers of oil shale, using on bed, bed second line of a couplet chalaza fire skill Art, speed of ignition is improved, nearly fast steady combustion, igniting is reduced and throws oil mass, fuel is sent into burner hearth on two-way material returning valve, extension is caught fire Time, to coal evenly, mixing it is more preferable, be advantageous to the burning of oil shale fuel;Arrangement high temperature superheater, high temperature reheater in stove And water-cooling screen, and all curtain walls are to be drawn from side wall, are evenly arranged in burner hearth central area, tube panel is heated It is more uniformly distributed, reduces the uneven degree of pipe thermic load in curtain wall, can be simultaneously reached burner hearth internal heat and absorb more For uniform purpose, so as to more effectively control the uniformity of boiler bed temperature, oil shale fuel is more beneficial in burner hearth Fully burning, and this arrangement, stove internal heating surface is set away from the sticking wall flow of burner hearth Matter Transfer, to reduce stove as far as possible The abrasion of heating surface in thorax, for oil shale abrasiveness it is strong the characteristics of, in burner hearth significant points laying abrasion-proof and refractory material Material.
Beneficial effects of the present invention:
1. the present invention is improved furnace height, is made fuel in burner hearth as far as possible using H types arrangement, single burner hearth, single air distributor structure Interior extended residence time, ensure that oil shale fuel can be fully burned in burner hearth, it is contemplated that oil shale is more in the form of sheets Structure, the fluidisation of bed being not easy to, reasonable Arrangement breathes out the major diameter bell-shaped blast cap of pot patented technology on burner hearth air distribution plate, Its inner tube resistance is reasonable in design, makes cloth wind uniform, makes bed fluidisation evenly.
Reheated steam of the present invention uses afterbody twin flue damper adjustment, and preceding flue arranges low-temperature reheater and economizer, after Flue arrangement medium temperature overheater, low temperature superheater and economizer, and above heating surface is arranged in Bao Qiang areas, using efficient whirlpool The cold separator of shell-type vapour is arranged symmetrically, and for its separative efficiency up to more than 99.99%, the dust content into afterbody Bao Qiang areas is big Big to reduce, so as to effectively prevent the abrasion of Bao Qiang areas heating surface, separator is arranged symmetrically, each separator inlet exhaust gas volumn and thing Doses is of substantially equal, is easy to ensure the uniformity of separator separating effect and returning charge amount, and inner flue gas of the stove and material flow field are also in pair Title form, evenly, burning diabatic process is easy to ensure in stove for flowing.
The present invention is used on bed, bed second line of a couplet chalaza ignition technique, improves speed of ignition, closely steady soon to fire, and reduces throwing oil mass of lighting a fire, Fuel is sent into burner hearth on two-way material returning valve, extends ignition time, to coal evenly, mixing it is more preferable, be advantageous to oil shale combustion The burning of material;Arrangement high temperature superheater, high temperature reheater and water-cooling screen in stove, and all curtain walls are from side wall Draw, be evenly arranged in burner hearth central area, make tube panel is heated to be more uniformly distributed, reduce pipe thermic load in curtain wall Uneven degree, it can be simultaneously reached burner hearth internal heat and absorb the purpose being more uniformly distributed, so as to more effectively control boiler bed temperature Uniformity, be more beneficial for abundant burning of the oil shale fuel in burner hearth, and this arrangement, use up stove internal heating surface Measure away from the sticking wall flow of burner hearth Matter Transfer, reduce the abrasion of heating surface in burner hearth, strong for the abrasiveness of oil shale Feature, during conceptual design, the significant points laying wearing-proof refractory material in burner hearth.
Brief description of the drawings:
Accompanying drawing 1 is the structural representation of the present invention.
Accompanying drawing 2 is the front view of accompanying drawing 1.
Accompanying drawing 3 is the top view of accompanying drawing 1.
Embodiment:
Embodiment 1:
A kind of 300MWCFB boilers for being used to use oil shale, its composition include:Boiler body, described described boiler Body portion is provided with square burner hearth 1, and prolonging burner hearth center arrangement directly over described square burner hearth has drum 11, described side The lower section of shape burner hearth has slag cooler 9 and Induct burner 10, the central area in described square burner hearth internal upper part space Water-cooling screen 5, high temperature reheater 6 and high temperature superheater 7 are disposed with, described square burner hearth both sides have been arranged symmetrically steam-water separator 3, described steam-water separator top is connected by gas approach 2 with square burner hearth, and described steam-water separator bottom is by returning Material valve 8 is connected with the square thorax of stove, and described steam-water separator is by exhaust pass 4 by the cold separator of vapour and afterbody enclosure wall superheater 14 connections.
Embodiment 2:
The 300MWCFB boilers for being used to use oil shale according to embodiment 1, described enclosure wall superheater are arranged in Square burner hearth dead astern, described enclosure wall superheater are divided into former and later two flues, before described enclosure wall superheater flue from it is upper it Under be sequentially arranged low-temperature reheater and economizer A18, be sequentially arranged medium temperature from top to bottom in described enclosure wall superheater rear pass Superheater 15, low temperature superheater 16 and economizer B19, are economizer hopper 20 below described enclosure wall superheater, described province Coal device ash bucket rear connects SCR device 21, and air preheater 12, described air preheater are set below described SCR device It is connected by hot-flow flue with square burner hearth, the exhanst gas outlet and air intake of described air preheater connect flue gas system respectively System.
Embodiment 3:
The 300MWCFB boilers for being used to use oil shale according to embodiment 1 or 2, described square burner hearth center line Overlapped with boiler body center line, described slag cooler is drawn on the left of the square burner hearth, and starter is from block furnace under described bed Drawn on the right side of thorax, described enclosure wall superheater is square, and described enclosure wall superheater center line overlaps with boiler center line.
Embodiment 4:
The layout method for being used to use the 300MWCFB boilers of oil shale according to embodiment 1 or 2 or 3, using H types Arrangement, single burner hearth, single air distributor structure, improve furnace height as far as possible, make extended residence time of the fuel in burner hearth, ensure oil Shale fuel can be fully burned in burner hearth, it is contemplated that oil shale structure in the form of sheets more, the fluidisation of bed is not easy to, Reasonable Arrangement major diameter bell-shaped blast cap on burner hearth air distribution plate, its inner tube resistance is reasonable in design, make cloth wind uniform, make bed stream Change evenly.
Embodiment 5:
The layout method for being used to use the 300MWCFB boilers of oil shale according to embodiment 1 or 2 or 3 or 4, reheating Steam uses afterbody twin flue damper adjustment, preceding flue arrangement low-temperature reheater and economizer, rear pass arrangement medium temperature overheater, Low temperature superheater and economizer, and above heating surface is arranged in Bao Qiang areas, it is symmetrical using the efficient cold separator of Scroll vapour Arrangement, its separative efficiency is up to more than 99.99%, and the dust content into afterbody Bao Qiang areas substantially reduces, so as to effectively prevent The abrasion of Bao Qiang areas heating surface, separator are arranged symmetrically, and each separator inlet exhaust gas volumn and inventory are of substantially equal, are easy to protect The uniformity of separator separating effect and returning charge amount is demonstrate,proved, inner flue gas of the stove and material flow field are also in symmetric form, are flowed evenly, stove Interior burning diabatic process is easy to ensure.
Embodiment 6:
The layout method for being used to use the 300MWCFB boilers of oil shale according to embodiment 1 or 2 or 3 or 4 or 5, Using on bed, bed second line of a couplet chalaza ignition technique, improve speed of ignition, nearly fast steady combustion, reduce igniting and throw oil mass, on two-way material returning valve Fuel is sent into burner hearth, extends ignition time, to coal evenly, mixing it is more preferable, be advantageous to the burning of oil shale fuel;Cloth in stove High temperature superheater, high temperature reheater and water-cooling screen are put, and all curtain walls are to be drawn from side wall, are evenly arranged in Burner hearth central area, make tube panel is heated to be more uniformly distributed, reduce the uneven degree of pipe thermic load in curtain wall, while can be with Reach burner hearth internal heat and absorb the purpose being more uniformly distributed, so as to more effectively control the uniformity of boiler bed temperature, more favorably In abundant burning of the oil shale fuel in burner hearth, and this arrangement, make stove internal heating surface as far as possible away from burner hearth thing Expect circulation sticking wall flow, reduce the abrasion of heating surface in burner hearth, for oil shale abrasiveness it is strong the characteristics of, in burner hearth Significant points lay wearing-proof refractory material.

Claims (2)

1. a kind of 300MWCFB boilers for being used to use oil shale, its composition include:Boiler body, it is characterized in that:Described pot Furnace body front portion is provided with square burner hearth, and prolonging burner hearth center arrangement directly over described square burner hearth has drum, described side The lower section of shape burner hearth has slag cooler and Induct burner, the central area arrangement in described square burner hearth internal upper part space There are water-cooling screen, high temperature reheater and high temperature superheater, described square burner hearth both sides have been arranged symmetrically steam-water separator, described Steam-water separator top is connected by gas approach with square burner hearth, and described steam-water separator bottom passes through material returning valve and stove side Shape thorax is connected, and described steam-water separator is connected the cold separator of vapour with afterbody enclosure wall superheater by exhaust pass;
Described boiler body is arranged using H types, using the structure type of single burner hearth, single air distribution plate;
Described enclosure wall superheater is arranged in square burner hearth dead astern, and described enclosure wall superheater is divided into former and later two flues, institute Flue is sequentially arranged low-temperature reheater and economizer A under upper before the enclosure wall superheater stated, cigarette after described enclosure wall superheater Road, medium temperature overheater, low temperature superheater and economizer B are inside sequentially arranged from top to bottom, be to save below described enclosure wall superheater Coal device ash bucket, described economizer hopper rear connection SCR device, described SCR device lower section sets air preheater, described Air preheater be connected by hot-flow flue with square burner hearth, the exhanst gas outlet and air intake of described air preheater difference Connect flue gas system;
Described square burner hearth center line is overlapped with boiler body center line, and described slag cooler is drawn on the left of square burner hearth, Starter is drawn on the right side of square burner hearth under described bed, and described enclosure wall superheater is square, in described enclosure wall superheater Heart line overlaps with boiler center line.
2. a kind of layout method for being used to use the 300MWCFB boilers of oil shale using described in claim 1, it is characterized in that: Using H types arrangement, single burner hearth, single air distributor structure, furnace height is improved as far as possible, prolongs residence time of the fuel in burner hearth It is long, ensure that oil shale fuel can be fully burned in burner hearth, it is contemplated that oil shale structure in the form of sheets more, be not easy to bed Fluidisation, the reasonable Arrangement major diameter bell-shaped blast cap on burner hearth air distribution plate, its inner tube resistance is reasonable in design, make cloth wind equal It is even, make bed fluidisation evenly;
Reheated steam uses afterbody twin flue damper adjustment, preceding flue arrangement low-temperature reheater and economizer, during rear pass is arranged Warm superheater, low temperature superheater and economizer, and above heating surface is arranged in Bao Qiang areas, using efficient cold point of Scroll vapour It is arranged symmetrically from device, up to 99 more than .99%, the dust content into afterbody Bao Qiang areas substantially reduces its separative efficiency, from And the abrasion of Bao Qiang areas heating surface is effectively prevented, separator is arranged symmetrically, and each separator inlet exhaust gas volumn and inventory are basic It is equal, it is easy to ensure the uniformity of separator separating effect and returning charge amount, inner flue gas of the stove and material flow field are also in symmetric form, stream Dynamic diabatic process of evenly, in stove burning is easy to ensure;
Using on bed, bed second line of a couplet chalaza ignition technique, improve speed of ignition, nearly fast steady combustion, reduce igniting and throw oil mass, in two-way feed back Fuel is sent into burner hearth on valve, extends ignition time, to coal evenly, mixing it is more preferable, be advantageous to the burning of oil shale fuel;Stove Interior arrangement high temperature superheater, high temperature reheater and water-cooling screen, and all curtain walls are to be drawn from side wall, uniform cloth Burner hearth central area is placed in, makes tube panel is heated to be more uniformly distributed, reduces the uneven degree of pipe thermic load in curtain wall, simultaneously Burner hearth internal heat can be reached and absorb the purpose being more uniformly distributed, so as to more effectively control the uniformity of boiler bed temperature, more Be advantageous to abundant burning of the oil shale fuel in burner hearth, and this arrangement, make stove internal heating surface as far as possible away from stove The sticking wall flow of thorax Matter Transfer, reduce the abrasion of heating surface in burner hearth, for oil shale abrasiveness it is strong the characteristics of, in burner hearth Interior significant points laying wearing-proof refractory material.
CN201510983680.8A 2015-12-24 2015-12-24 For using the 300MWCFB boilers and layout method of oil shale Active CN105444144B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110285400B (en) * 2019-06-28 2020-10-09 自贡华西能源工业有限公司 Pure fuel oil shale CFB boiler
CN110822394A (en) * 2019-11-19 2020-02-21 哈尔滨锅炉厂有限责任公司 Novel biomass direct-fired CFB boiler and combustion method

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