CN205825011U

CN205825011U - A kind of fluidized-bed combustion boiler environment protecting power economizer

Info

Publication number: CN205825011U
Application number: CN201620537458.5U
Authority: CN
Inventors: 裴振洪; 郑博; 张晓达; 申影影; 贾节罡
Original assignee: Sunshine Guang Yuanredong Co Ltd
Current assignee: Sunshine Guang Yuanredong Co Ltd
Priority date: 2016-06-06
Filing date: 2016-06-06
Publication date: 2016-12-21
Anticipated expiration: 2026-06-06

Abstract

This utility model is specifically related to a kind of fluidized-bed combustion boiler environment protecting power economizer, and including boiler, described boiler is connected with overfire air fan by secondary wind pipeline；Described secondary wind pipeline is connected with air-separating plant by oxygen-enriched pipeline；Described boiler is connected with primary air fan by First air pipeline；Described First air pipeline is connected with air-separating plant by anoxia pipeline；Described dedusting collection device enters boiler mouth by reuse pipeline with secondary wind pipeline and is connected；Described dedusting collection device is connected with boiler by flue gas exhaust pipe；Described dedusting collection device is also associated with gas pipeline；It is provided with flow controller on described reuse pipeline；Inventor proposes a kind of novel fluidized bed environment protecting power economizer, reduce siege temperature, the generation of suppression nitrogen oxides, improve upper furnace and furnace exit temperature, improve the green technology of SNCR denitration efficiency, unburned carbon in flue dust can be reduced simultaneously, improve steam generator system efficiency, improve the energy-saving effect of boiler on-load ability.

Description

A kind of fluidized-bed combustion boiler environment protecting power economizer

Technical field

This utility model is specifically related to a kind of fluid bed environment protecting power economizer.

Background technology

At present, along with national economy situation downstream pressure is increasing, the enhancing day by day of environmental consciousness, the day of environmental protection standard Benefit is strict, either energy-saving and emission-reduction or environmental transformation, is all that each enterprise have to be in the face of the problem with solution.

Equally, current domestic coal-burning boiler steam power plant there is also the problems referred to above, at different levels in particular at present country, provinces and cities Department release minimum discharge requirement, wherein for NOx content current un-fluidized-bed boiler and fluidized-bed combustion boiler perform respectively≤ 50mg/Nm³With≤100 mg/Nm³Standard.NOx content≤100mg/ the Nm proposed for fluidized-bed combustion boiler³It it is country's convection current Change a kind of accreditation of the low nitrogen burning of bed own and encourage, but a lot of enterprise exists a lot of problem and difficulty in actual motion, Especially most fluidized-bed combustion boilers the most singly use SNCR (SNCR) method denitration, do not use the most de- Can not stablize in the case of nitre technique, for a long time, continuously, effectively NOx content is controlled at 100 mg/Nm³Hereinafter, and SNCR Method sweetening process increases the usage amount of denitrfying agent, thus causes following present situations: the discharge of first, NOx can not be up to standard Run, bring huge risk to producing, cause huge damage to environment；Second, sharply increasing of denitration cost；3rd, mistake The secondary pollution that a large amount of the escaping of ammonia that the input of amount denitrfying agent causes cause；4th, simultaneously enter combustion system with denitrfying agent A large amount of steam enter the generation of the flue gas system corrosion to rear portion equipment and blockage problem, thus to equipment service life and peace Entirely cause tremendous influence；5th is because that the flue gas resistance increase heat exchange efficiency decline that blocking brings with etching problem etc. is secondary asks The generation of topic.

Boiler uses substantial amounts of coal simultaneously.For the coal-burning utilities of non-self producing coal charcoal, current coal price is relatively low, transport The ratio that cost accounts in coal cost is the highest, and therefore promoting heating value of coal will be to reduce entreprise cost to reduce carbon simultaneously The energy-saving and emission-reduction measure of discharge, but this produces again the low enterprise of boiler furnace negative pressure, stove high bed temperature, fire box temperature is too low waits pair Effect, thus cause boiler on-load ability to decline, also result in boiler combustion status and further promote the generation of NOx, press down Make the work efficiency of denitrfying agent.

The problems referred to above existed for fluidized-bed combustion boiler are proposed a kind of fluid bed environment protecting power economizer by this patent, will effectively Solve the problems referred to above.

Summary of the invention

The deficiency existed according to prior art and blank, inventor of the present utility model proposes a kind of fluid bed environmental protection and energy saving Device, has reduction siege temperature, suppresses NO_x formation, increase upper furnace and furnace exit temperature, improves SNCR and takes off The green technology of nitre efficiency, reduces unburned carbon in flue dust simultaneously, improves steam generator system efficiency, improves the energy-conservation of boiler on-load ability Effect.

Concrete technical scheme of the present utility model is as follows:

A kind of fluid bed environment protecting power economizer, including boiler, described boiler is by secondary wind pipeline with overfire air fan even Connect；Described secondary wind pipeline is connected with air-separating plant by oxygen-enriched pipeline；Described boiler by First air pipeline with Primary air fan connects；Described First air pipeline is connected with air-separating plant by anoxia pipeline；Described secondary wind pipeline It is connected with dedusting collection device by reuse pipeline at boiler inlet；Described dedusting collection device by flue gas exhaust pipe with Boiler is connected；Described dedusting collection device is also associated with gas pipeline；It is provided with flow controller on described reuse pipeline；

Described flow controller can realize manually adjusting, it is also possible to realizes automatically controlling.

Described fluid bed environment protecting power economizer supports the use non-selective catalytic reduction denitration simultaneously.

Its concrete use process is as follows:

Air isolates oxygen-enriched air and reducing air through air-separating plant, and oxygen-enriched air enters boiler through oxygen-enriched pipeline Secondary wind entrance, reducing air is mixed into First air through anoxia pipeline, and the flue gas that boiler combustion produces enters through flue gas exhaust pipe and removes Dirt collection device is collected and refluxes through reuse pipe section, and flying dust flows backward through reuse pipeline and sends into boiler secondary air entrance And strile-back.Owing to secondary wind now mixed gas oxygen content is higher, therefore boiler secondary air zonal combustion is relatively abundant, upper furnace And furnace outlet unknown temperatures will significantly improve, 5 ~ 30 DEG C can be effectively improved for fluidized-bed combustion boiler, thus improve denitration The work efficiency of agent, while ensureing SNCR denitration efficiency, reduces the usage amount of denitrfying agent, decreases amount of ammonia slip；Due to First air is mixed into the reuse of reducing air and flying dust, it is suppressed that the combustion efficiency at siege position and temperature, for fluid bed pot Stove can effectively reduce by 5 ~ 30 DEG C, thus reduces the generation of NOx compound；The recycle stock of fly-ash reburning supplement boiler simultaneously Amount, improves boiler heat exchange ability, thus boiler on-load ability is effectively ensured；Heat is taken by boiler bottom by fly-ash reburning simultaneously Take at upper furnace and furnace outlet, while improve boiler on-load ability and efficiency, reduce the temperature of siege, press down The generation of NOx compound processed, and improve the temperature of SNCR reaction zone, improve denitration efficiency.

Realizing above-mentioned technique mainly to be realized by fly-ash reburning device, apparatus structure is as follows:

In sum, inventor provide a kind of novel fluidized bed boiler environment protecting power economizer, effectively promote boiler heat exchange Ability, it is ensured that boiler on-load ability, effectively inhibits the generation of NOx compound simultaneously.

Accompanying drawing explanation

Fig. 1 is fluid bed environment protecting power economizer structural representation described in the utility model；

In figure, 1 is overfire air fan, and 2 is secondary wind pipeline, and 3 is boiler, and 4 is flue gas exhaust pipe, and 5 is dedusting collection device, 6 is flue gas exhaust pipe, and 7 is reuse pipeline, and 8 is First air pipeline, and 9 is primary air fan, and 10 is anoxia pipeline, and 11 separate for air Device, 12 is oxygen-enriched pipeline, and 13 is flow regulator.

Detailed description of the invention

A kind of fluid bed environment protecting power economizer, including boiler 3, described boiler 3 is by secondary wind pipeline 2 and overfire air fan 1 connects；Described secondary wind pipeline 2 is connected with air-separating plant 11 by oxygen-enriched pipeline 12；Described boiler 3 is by once Wind pipeline 8 is connected with primary air fan 9；Described First air pipeline 8 is connected with air-separating plant 11 by anoxia pipeline 10；Institute The secondary wind pipeline 2 stated is connected with dedusting collection device 5 by reuse pipeline 7；Described dedusting collection device 5 is arranged by flue gas Trachea 4 is connected with boiler 3；Described dedusting collection device 5 is also associated with flue gas exhaust pipeline 6；Set on described reuse pipeline 7 It is equipped with flow controller 13.

Claims

1. a fluidized-bed combustion boiler environment protecting power economizer, it is characterised in that: include that boiler (3), described boiler (3) pass through secondary Wind pipeline (2) is connected with overfire air fan (1)；Described secondary wind pipeline (2) passes through oxygen-enriched pipeline (12) and air-separating plant (11) it is connected；Described boiler (3) is connected with primary air fan (9) by First air pipeline (8)；Described First air pipeline (8) It is connected with air-separating plant (11) by anoxia pipeline (10)；Described dedusting collection device (5) is same by reuse pipeline (7) Secondary wind pipeline (2) enters boiler mouth and is connected；Described dedusting collection device (5) is connected with boiler (3) by fume pipe (4)；Institute The dedusting collection device (5) stated is also associated with flue gas exhaust pipeline (6).

Fluidized-bed combustion boiler environment protecting power economizer the most according to claim 1, it is characterised in that: described reuse pipeline (7) On be provided with flow controller (13).

Fluidized-bed combustion boiler environment protecting power economizer the most according to claim 2, it is characterised in that: described flow controller (13) for manually adjusting or automatically controlling.

4. the fluidized-bed combustion boiler environment protecting power economizer described in claim 1 is applied to non-selective catalytic reduction denitration method.