CN202216243U

CN202216243U - External combustion type low-amount oil stable-combustion and energy-saving combustion device

Info

Publication number: CN202216243U
Application number: CN2011203234614U
Authority: CN
Inventors: 徐军
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-05-09
Anticipated expiration: 2021-08-31

Abstract

An external combustion type low-amount oil stable-combustion and energy-saving combustion device includes a rich-thin phase separator, a nozzle of an external combustion type burner, an ignition oil gun and a fire detection device, wherein the rich-thin phase separator is provided with a cylindrical part, a rectangular transition pipe with taper and a rectangular pipeline in outline which are sequentially arranged from left to right, and the rich-thin phase separator is divided into an upper passage serving as a rich phase coal dust passage, a lower passage serving as a thin phase coal dust passage, and a separation part in the middle from the transition pipe through a partition board; a crossed grading bluff body is arranged at the right top end of the separation part; and the nozzle of the external combustion type burner is arranged on the outer wall of the crossed grading bluff body. The external combustion type low-amount oil stable-combustion and energy-saving combustion device has ultra-strong low load stable combustion capability together with the low load ignition and cold state ignition capabilities, greatly saves the combustion-supporting oil as the low load with no oil of the reformed combustor varies from 35% to 48%, has the NOx low combustion and emission function, and achieves the energy-saving effect of low-amount oil ignition.

Description

A kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines

Technical field

The utility model relates to a kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines, and it is applicable to the combustion system of pulverized coal furnace of hydropower station.

Background technology

At present, the widely used energy-saving combustion form of generating plant pulverized coal boiler is representative with plasma and tiny-oil ignition mainly; Be single fuel-economizing firing technique; Ignition principle be Pulverized Coal Concentration to finite concentration, utilize small oil gun or isoionic point detonation, but these two technology do not have low-load combustion-stabilizing and low NO _XCombustion, excessively the concentrating of coal dust make the wear-resisting operating mode of equipment and abominable, and the local temperature of plasma ignition is very high, and burner is prone to oxidization burning loss, greatly reduces the service life of equipment.

Summary of the invention

The purpose of the utility model will provide a kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines exactly, and it can overcome the existing existing problem of generating plant pulverized coal boiler burner.The purpose of the utility model is to realize like this; A kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines; Comprise that dense dilute phase separator, external-burning burner nozzle, torch oil gun and fire monitor equipment form, it is characterized in that: dense dilute phase separator profile sets gradually into rectangle transition conduit, the rectangle pipeline of cylindrical shape, band tapering from left to right, and from transition conduit, to begin to be divided into upper channel by gusset be the dense phase pulverized coal passage; Lower channel is a dilute phase coal dust passage, and middle is isolation place; The right top of isolation place is provided with cross classification bluff body, and the outer wall of cross classification bluff body is provided with the external-burning burner nozzle; Torch oil gun, fire monitor equipment are inserted into the recirculation zone of cross classification bluff body from the intermediate isolating of dense phase pulverized coal passage, dilute phase coal dust passage.The utility model adopts dense, dilute phase isolation technics and the bluff body isolation technics of upper channel sectional area less than the lower channel sectional area, and coal dust is through spiral dense phase pulverized coal passage, dilute phase coal dust channel separation, and bluff body is carried out classification; Form fractional combustion, relies on wind to open the heatflow characteristics of bluff body recirculating zone, back and wake flow recovery district, with formation high-temp combustion thermal source; Its stability is higher than the flame holder of oil burner greatly; Thereby form more powerful steady combustion ability, take into account underload, cold conditions igniting, and enlarge coal adaptability; Fully satisfy the needs of boiler different load and different coals, and possess low NO _XFunction.NO _XGeneration mainly be high temperature and sufficient these two conditions of oxygen, be the general designation of oxynitrides.High temperature must cause NO with sufficient oxygen _XMaximum discharge, adopt the external combustion steady combustion of the oil combustion technology of catching fire that declines, the reinforcement initial stage fire burns, improves burner region coal dust firing speed, with consume oxygen to greatest extent, and on air distribution, reduces oxygen supply, thereby makes the burner region anoxic and suppress NO _XGeneration.

Performance indications are:

1. the de-oiling minimum load 35～48%;

2. boiler cold-state starts fuel-economizing more than 80%;

3. ash content carbon 1～4% fluctuation;

4. be suitable for different coals, allow the ature of coal of wide region to change same burner;

5. low NO _XBurning and exhausting (54%～41.6%).

Economic benefit is:

1. because the enhancing of burner low-load combustion-stabilizing ability, be that to need not to throw oil at 50% o'clock combustion-supporting at the minimum peak regulation load of power industry regulation at present, make every night underrun reduce by an oil gun and use oil mass, just reduce by 800～1500Kg/h with oily;

2. small oil gun is directly lighted coal dust, makes the cold start fuel-economizing more than 80%, for some peak regulation factories, and the boiler frequent starting, the fuel-economizing meaning is bigger;

3. many coals are adapted to owing to possessed low-load combustion-stabilizing, burning that can be stable, especially to discarded object coal slime and ash up to the gangue more than 50.

Description of drawings:

Fig. 1: be the utility model structural representation;

Fig. 2: be the utility model side-feeding type igniter sketch map;

1. dense dilute phase separator, 2. transition conduit, 3. surrounding air bellows, 4. dense phase pulverized coal passage; 5. recirculation zone, 6. external-burning burner nozzle, 7. main flow flame, 8. dilute phase coal dust passage; 9. cross classification bluff body, 10. surrounding air inlet, 11. center wind inlets, 12. thermocouples; 13. torch oil gun, 14. fire monitor equipments, 15. wear-resistant ceramic sheets.

The specific embodiment: the utility model is described further below in conjunction with accompanying drawing;

A kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines; Comprise dense dilute phase separator 1, external-burning burner nozzle 6,

torch oil gun

13 and 14 compositions of fire monitor equipment; It is characterized in that: dense dilute phase separator 1 profile sets gradually into rectangle transition conduit 2, the rectangle pipeline of cylindrical shape, band tapering from left to right; And from transition conduit 2, to begin to be divided into upper channel by gusset be dense phase pulverized coal passage 4, and lower channel is a dilute phase coal dust passage 8, middlely is isolation place; The right top of isolation place is provided with cross classification bluff body 9, and the outer wall of cross classification bluff body 9 is provided with external-burning burner nozzle 6; Torch oil gun 13, fire monitor equipment 14 are inserted into the recirculation zone 5 of cross classification bluff body 9 from the intermediate isolating of dense phase pulverized coal passage 4, dilute phase coal dust passage 8.During practical implementation; Do not change former boiler-burner major function, do not increasing under the prerequisite of a wind resistance system reform of carrying out; Relate to the energy-saving and environmental protection of boiler heat energy combustion parts, surely fire three aspects, pulverized-coal fired boiler energy-conservation is mainly reflected in fuel-economizing, economizes on coal, economizes on electricity; Environmental protection is embodied in SO ₂And NO _XDischarging, the adaptive capacity of the present low-load combustion-stabilizing of combustion stabilizing body and many coals is burners of a kind of energy-efficient, environmental protection.Coal dust forms dense phase pulverized coal passage, dilute phase coal dust channel separation through dense dilute phase separator through 90 ° of rotations, and coal dust forms dense phase pulverized coal passage, the dilute phase coal dust passage of isolated operation; Dense phase pulverized coal is burnt in the bluff body recirculation zone in advance, and the design of classification bluff body forms the coal dust recirculating zone, and the recirculation zone dense phase pulverized coal is heated up rapidly by the high temperature gases recirculating heating; And pulverized coal particle is because of inertia and flow separation gathering; Catch fire thereby contained fugitive constituent is fully separated out, also lighted particle itself, through a small amount of mist of oil of torch oil gun; Just can form the very stable source point that catches fire, thereby stablize main flow flame.

Claims

1. an external combustion steady combustion of the oil energy-saving combustion apparatus that declines; Comprise that dense dilute phase separator (1), external-burning burner nozzle (6), torch oil gun (13) and fire monitor equipment (14) form; It is characterized in that: dense dilute phase separator (1) profile sets gradually into rectangle transition conduit (2), the rectangle pipeline of cylindrical shape, band tapering from left to right; And from transition conduit (2), to begin to be divided into upper channel by gusset be dense phase pulverized coal passage (4); Lower channel is a dilute phase coal dust passage (8), and middle is isolation place; The right top of isolation place is provided with cross classification bluff body (9), and the outer wall of cross classification bluff body (9) is provided with external-burning burner nozzle (6); Torch oil gun (13), fire monitor equipment (14) are inserted into the recirculation zone (5) of cross classification bluff body (9) from the intermediate isolating of dense phase pulverized coal passage (4), dilute phase coal dust passage (8).