CN205424879U - A 300MWCFB boiler for using oil shale - Google Patents

A 300MWCFB boiler for using oil shale Download PDF

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Publication number
CN205424879U
CN205424879U CN201521090296.7U CN201521090296U CN205424879U CN 205424879 U CN205424879 U CN 205424879U CN 201521090296 U CN201521090296 U CN 201521090296U CN 205424879 U CN205424879 U CN 205424879U
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China
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burner hearth
boiler
square
oil shale
enclosure wall
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CN201521090296.7U
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Chinese (zh)
Inventor
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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Priority to CN201521090296.7U priority Critical patent/CN205424879U/en
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Abstract

(B, ) the utility model relates to an use (b) (b) 300MWCFB (b) (b) boiler of oil shale. The maximization that the realization used the circulating fluidized bed boiler of oil shale fuel has become key subjects of circulating fluidized bed boiler technical development. The utility model discloses an use (b) (b) 300MWCFB (b) (b) boiler of oil shale, its constitution includes: boiler body, prolong the furnace center directly over the square furnace and arranged drum (b) (b) 11 (b) (b), square furnace's below has and starts combustor (b) (b) 10 (b) (b) under cold sediment ware (b) (b) 9 (b) (b) and the bed, the central zone in upper portion space has arranged water -cooling screen (b) (b) 5 (b) (b) in the square furnace, high -temperature reheater (b) (b) 6 (b) (b) and high temperature over heater (b) (b) 7 (b) (b), square furnace both sides symmetrical arrangement has catch water (b) (b) 3 (b) (b), catch water upper portion is connected with square furnace through entry flue (b) (b) 2 (b) (b), catch water passes through the lower part loop seal (b) (b) 8 (b) (b) and is connected with the square thorax of stove, catch water passes through exhaust pass (b) (b) 4 (b) (b) with vapour cold separation ware and afterbody package wall over heater (b) (b) 14 (b) (b) intercommunication. The utility model discloses be applied to (b) (b) 300MWCFB (b) (b) the boiler that uses the oil shale. (B, )

Description

300MWCFB boiler for fuel oil shale
Technical field:
This utility model relates to a kind of 300MWCFB boiler for fuel oil shale.
Background technology:
China's oil shale reserves is big, traditional oil shale utilization of energy technique exists that cost is high, utilization rate is low, granule wax shale cannot be carried out oil refining, there are about 30% oil shale and cannot be carried out oil refining, need to discharge on the spot and stack, create the most serious environmental pollution, and use oil shale can realize the comprehensive utilization of oil shale as the fuel of coal-burning power plant, and reduce the pollution to environment, advantageously account for the problems such as fuel anxiety and oil shale accumulation, there is far-reaching social benefit;Owing to pulverized coal preparation system is unreliable, dust stratification, stifled ash, the problems such as seriously corroded and steady combustion difficulty exist, oil shale cannot be used as the fuel of pulverized-coal fired boiler always, and use Combustion technology of circulating fluidized can well solve the problems referred to above, as far back as the nineties in last century, the small-scale circulating fluidized bed boiler of existing fuel oil shale is put into commercial operation, but its efficiency of combustion is low, pollutant discharge amount is higher, therefore, the maximization of the CFBB realizing fuel oil shale fuel has become as key subjects of Technology of Circulating Fluidized Bed Boiler development, the technology of the most domestic 300MWCFB boiler that there is no fuel oil shale fuel, this technology has wide market prospect.
300MWCFB boiler technology is the most highly developed at present, has obtained substantial amounts of application at home and abroad.Because oil shale abrasiveness is strong, volatile matter is high, easily catch fire, after-flame is difficult, calorific value is low, relatively big to combustion effects in stove, on heavy duty boiler, design difficulty is the biggest, so, the 300MWCFB boiler technology with oil shale as fuel there is presently no Related product.
Summary of the invention:
The purpose of this utility model is to provide a kind of 300MWCFB boiler for fuel oil shale.
Above-mentioned purpose is realized by following technical scheme:
A kind of 300MWCFB boiler for fuel oil shale, its composition includes: boiler body, described described boiler body front portion is provided with square burner hearth, burner hearth center arrangement is prolonged in the surface of described square burner hearth drum, the lower section of described square burner hearth has slag cooler and Induct burner, 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 lateral symmetry is disposed with steam-water separator, described steam-water separator top is connected with square burner hearth by gas approach, described steam-water separator bottom is connected by material returning valve thorax square with stove, cold for vapour separator is connected with afterbody enclosure wall superheater by described steam-water separator by exhaust pass.
The described 300MWCFB boiler for fuel oil shale, described enclosure wall superheater is arranged in square burner hearth dead astern, described enclosure wall superheater is divided into former and later two flues, before described enclosure wall superheater, flue is sequentially arranged low-temperature reheater and economizer A under upper, medium temperature overheater it is sequentially arranged from top to bottom in described enclosure wall superheater rear pass rear pass, low temperature superheater and economizer B, it it is economizer hopper below described enclosure wall superheater, described economizer hopper rear connects SCR device, below described SCR device, air preheater is set, described air preheater is connected with square burner hearth by hot-flow flue, the exhanst gas outlet of described air preheater and air intake connect flue gas system respectively.
300MWCFB boiler for fuel oil shale, described square burner hearth centrage overlaps with boiler body centrage, described slag cooler is drawn on the left of square burner hearth, under described bed, trigger is drawn on the right side of square burner hearth, the enclosure wall superheater centrage that described enclosure wall superheater is square, described overlaps with boiler centrage.
The beneficial effects of the utility model:
1. this utility model uses H type layout, single burner hearth, single air distributor structure, improve furnace height as far as possible, make fuel extended residence time in burner hearth, ensure that oil shale fuel can be fully burned in burner hearth, it is contemplated that the many structures in the form of sheets of oil shale, be not easy to the fluidisation of bed, on burner hearth air distribution plate, reasonable Arrangement breathes out the major diameter bell-shaped blast cap of pot patented technology, its inner tube resistance is reasonable in design, makes cloth wind uniform, makes bed fluidize evenly.
This utility model reheated steam uses afterbody twin flue damper adjustment, front flue arranges low-temperature reheater and economizer, rear pass arranges medium temperature overheater, low temperature superheater and economizer, and above heating surface is arranged in Bao Qiang district, the efficient cold separator of Scroll vapour is used to be arranged symmetrically with, its separation efficiency is up to more than 99.99%, the dust content entering afterbody Bao Qiang district is substantially reduced, thus effectively prevent the abrasion of Bao Qiang district heating surface, separator is arranged symmetrically with, each separator inlet exhaust gas volumn and inventory are of substantially equal, it is prone to ensure separator separating effect and the uniformity of returning charge amount, inner flue gas of the stove and material flow field the most symmetrically form, flowing is evenly, in stove, burning diabatic process is prone to ensure.
This utility model uses on bed, bed second line of a couplet chalaza ignition technique, improves speed of ignition, nearly fast steady combustion, reduces igniting and throw oil mass, fuel is sent on two-way material returning valve burner hearth, extend ignition time, coal supply evenly, mixing more preferably, the beneficially burning of oil shale fuel;High temperature superheater is arranged in stove, high temperature reheater and water-cooling screen, and all curtain walls is and draws from side wall, it is evenly arranged in burner hearth central area, make tube panel be heated to be more uniformly distributed, reduce the uneven degree of pipe thermic load in curtain wall, can be simultaneously reached burner hearth internal heat and absorb the purpose being more uniformly distributed, thus more effectively control the uniformity of boiler bed temperature, it is more beneficial for the abundant burning in burner hearth of the oil shale fuel, and this arrangement, make stove internal heating surface as far as possible away from the sticking wall flow of burner hearth Matter Transfer, reduce the abrasion of heating surface in burner hearth, for the feature that the abrasiveness of oil shale is strong, during conceptual design, significant points in burner hearth lays wearing-proof refractory material.
Accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is the front view of accompanying drawing 1.
Accompanying drawing 3 is the top view of accompanying drawing 1.
Detailed description of the invention:
Embodiment 1:
A kind of 300MWCFB boiler for fuel oil shale, its composition includes: boiler body, described described boiler body front portion is provided with square burner hearth 1, burner hearth center arrangement is prolonged in the surface of described square burner hearth drum 11, the lower section of described square burner hearth has slag cooler 9 and Induct burner 10, the central area in described square burner hearth internal upper part space is disposed with water-cooling screen 5, high temperature reheater 6 and high temperature superheater 7, described square burner hearth lateral symmetry is disposed with steam-water separator 3, described steam-water separator top is connected with square burner hearth by gas approach 2, described steam-water separator bottom is connected by material returning valve 8 thorax square with stove, cold for vapour separator is connected with afterbody enclosure wall superheater 14 by described steam-water separator by exhaust pass 4.
Embodiment 2:
According to the 300MWCFB boiler for fuel oil shale described in embodiment 1, described enclosure wall superheater is arranged in square burner hearth dead astern, described enclosure wall superheater is divided into former and later two flues, before described enclosure wall superheater, flue is sequentially arranged low-temperature reheater and economizer A18 under upper, medium temperature overheater 15 it is sequentially arranged from top to bottom in described enclosure wall superheater rear pass rear pass, low temperature superheater 16 and economizer B19, it it is economizer hopper 20 below described enclosure wall superheater, described economizer hopper rear connects SCR device 21, air preheater 12 is set below described SCR device, described air preheater is connected with square burner hearth by hot-flow flue, the exhanst gas outlet of described air preheater and air intake connect flue gas system respectively.
Embodiment 3:
The 300MWCFB boiler of fuel oil shale it is used for according to embodiment 1 or 2, described square burner hearth centrage overlaps with boiler body centrage, described slag cooler is drawn on the left of square burner hearth, under described bed, trigger is drawn on the right side of square burner hearth, the enclosure wall superheater centrage that described enclosure wall superheater is square, described overlaps with boiler centrage.

Claims (3)

1. the 300MWCFB boiler for fuel oil shale, its composition includes: boiler body, it is characterized in that: described boiler body front portion is provided with square burner hearth, burner hearth center arrangement is prolonged in the surface of described square burner hearth drum, the lower section of described square burner hearth has slag cooler and Induct burner, 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 lateral symmetry is disposed with steam-water separator, described steam-water separator top is connected with square burner hearth by gas approach, described steam-water separator bottom is connected by material returning valve thorax square with stove, cold for vapour separator is connected with afterbody enclosure wall superheater by described steam-water separator by exhaust pass.
300MWCFB boiler for fuel oil shale the most according to claim 1, it is characterized in that: described enclosure wall superheater is arranged in square burner hearth dead astern, described enclosure wall superheater is divided into former and later two flues, before described enclosure wall superheater, flue is sequentially arranged low-temperature reheater and economizer A under upper, medium temperature overheater it is sequentially arranged from top to bottom in described enclosure wall superheater rear pass rear pass, low temperature superheater and economizer B, it it is economizer hopper below described enclosure wall superheater, described economizer hopper rear connects SCR device, below described SCR device, air preheater is set, described air preheater is connected with square burner hearth by hot-flow flue, the exhanst gas outlet of described air preheater and air intake connect flue gas system respectively.
300MWCFB boiler for fuel oil shale the most according to claim 1 and 2, it is characterized in that: described square burner hearth centrage overlaps with boiler body centrage, described slag cooler is drawn on the left of square burner hearth, under described bed, trigger is drawn on the right side of square burner hearth, the enclosure wall superheater centrage that described enclosure wall superheater is square, described overlaps with boiler centrage.
CN201521090296.7U 2015-12-24 2015-12-24 A 300MWCFB boiler for using oil shale Active CN205424879U (en)

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Application Number Priority Date Filing Date Title
CN201521090296.7U CN205424879U (en) 2015-12-24 2015-12-24 A 300MWCFB boiler for using oil shale

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105444144A (en) * 2015-12-24 2016-03-30 哈尔滨锅炉厂有限责任公司 300MWCFB boiler and distribution method for oil shale for combustion
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105444144A (en) * 2015-12-24 2016-03-30 哈尔滨锅炉厂有限责任公司 300MWCFB boiler and distribution method for oil shale for combustion
CN105444144B (en) * 2015-12-24 2018-02-13 哈尔滨锅炉厂有限责任公司 For using the 300MWCFB boilers and layout method of oil shale
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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