CN2534468Y

CN2534468Y - Vortex furnace arch moving gasification stepping burning bed furnace

Info

Publication number: CN2534468Y
Application number: CN 02211497
Authority: CN
Inventors: 卢长柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-26
Filing date: 2002-04-26
Publication date: 2003-02-05
Anticipated expiration: 2012-04-26

Abstract

A spin flow furnace arch movable gasification gradual combustion layer burning furnace, which belongs to the technology field of coal fired boiler. The structure which is a combined furnace arch completely covers the movable fire bed, the diversion arch under the combined furnace arch is vertical furnace wall. A circular outlet connected to the double sides or single side smoke channel is arranged on the furnace walls at two sides or single side of the cyclone combustion area. The main combustion area and the combustion ash area are connected to the cyclone combustion area through the tangential channel. A plurality of furnace raft inlet are arranged on the movable fire bed in the scope of the main combustion area and the combustion ahs area. Two rows of secondary air opening with different section are arranged on two side furnace walls of the main combustion area. A third air opening is arranged on the vertical section furnace wall of the combined furnace arch in the cyclone combustion area; The advantage is that the movable gasification of fuel (raw coal or industrial coal) and gradual combustion are realized after the unique furnace arch structure is combined with the scientific wind distribution technology, which achieves an integrated effect of low soot concentration, low nitrogen and no smoke, high efficiency and energy saving.

Description

The eddy flow chimney arch moves gasification fractional combustion grate furnace

Technical field:

The utility model belongs to the coal-burning boiler technical field.

Background technology:

At present, the grate firing boiler of most burning raw coal and industrial shaping coal (coal briquette) generally adopts traditional front and back arch structure pattern; The furnace temperature in face arch district remains on the high temperature level sustainedly and stably than difficulty, the intensification in new coal seam, and the required thermal source that catches fire often is not being met, and the ignition lag phenomenon happens occasionally, when ature of coal is relatively poor even can cutoff; Smoke medicining dust-removing effect is poor in the stove, and the generation of oxynitrides can't be effectively controlled, and causes China's coal-burned industrial boiler to become one of greatest contamination source of atmospheric environment.

In order to solve the ignition issues of coal inferior, " all standing eddy flow chimney arch portable grate stove " declared (ZL94217318X) utility model patent was once arranged, it is conceived substantially and has initiative, but the popularity of manufacturability, practicality and the application of the furnace arch structure feature that relates to is relatively poor.

Summary of the invention:

Technical problem to be solved in the utility model is:

Provide a kind of eddy flow chimney arch to move gasification fractional combustion grate furnace, fundamentally overcome the limitation of the related furnace arch structure feature of many drawbacks of traditional front and back arch structure mode layer burner and aforementioned patent, realize the mobile gasification and the fractional combustion of raw coal and industrial shaping coal, reached low dust concentration, low smokeless, the energy-efficient complex art effect of nitrogen.

The technical solution of the utility model is:

Combined furnace arch all covers mobile grate, combined furnace arch is from front to back successively by vertical section a, arc section b, preceding horizontal segment c, level inclination is 30---45 ° tilting section d, back horizontal segment e forms, water conservancy diversion arch below the combined furnace arch is upright furnace wall, it is divided into the combustion chamber primary zone B at rear portion, burning-out zone C and anterior cyclone firing district A, there is round exit to lead to bilateral or one-sided flue on the bilateral furnace wall of cyclone firing district A or the one-sided furnace wall, primary zone B and burning-out zone C communicate with cyclone firing district A through the tangential passage of water conservancy diversion arch upper edge, in the mobile grate of primary zone B and burning-out zone C scope, be provided with several fire grate air inlets, on the furnace wall of the both sides of primary zone B, be provided with the overfiren air port of two rows unequal section, be provided with several in the combined furnace arch vertical section furnace wall in cyclone firing district A to several ten tertiary air orifices, the headwall of the one-sided round exit of cyclone chamber is provided with the rotating jet tertiary air orifice.

The beneficial effects of the utility model are:

Combine with the furnace arch structure of uniqueness and the air distribution technology of science, realized the mobile gasification and the fractional combustion of fuel (raw coal or industrial shaping coal), reached low dust concentration, low smokeless, the energy-efficient resultant effect of nitrogen.

Description of drawings:

Fig. 1 is the utility model overall structure cutaway view;

Fig. 2 is a cyclone chamber bilateral outlet side cutaway view of the present utility model;

Fig. 3 is the one-sided outlet side cutaway view of cyclone chamber of the present utility model;

Wherein: the 1st, mobile grate, the 2nd, the cyclone chamber side wall, the 3rd, the water conservancy diversion arch, the 4th, the fire grate air inlet, the 5th, combined furnace arch, the 6th, inspection door, the 7th, combustion chamber Hou Qiang, the 8th, primary zone side wall overfiren air port, the 9th, smoke-box, the 10th, the primary zone side wall, the 11st, the tangential passage in B district to A district, the 12nd, the cyclone chamber round exit, the 13rd, the tertiary air orifice in the combined furnace arch vertical section, the 14th, furnace bin, the 15th, the coal bunker gate, the 16th, flue, the 17th, the cyclone chamber headwall, the 18th, the rotating jet tertiary air orifice, the 19th, raw coal or industrial shaping coal.

The specific embodiment:

Coal-fired (raw coal or industrial shaping coal) from furnace bin after the coal bunker gate enters in the stove, heated up by Fast Heating in high temperature cyclone firing district A, gasification and doing is slipped fast in not for the reducing atmosphere of the high temperature anoxic of a wind, gasification product (fuel gas) is in case leave the coal seam and just meet with tertiary air and be involved in the swirling eddy in the coal seam.After the coal seam that has caught fire enters primary zone B, still in the reducing atmosphere of primary air flow deficiency, continue gasification and burning, fuel gas that gasification produces and the secondary wind facies on surface, coal seam chance, finally in the cyclone firing district by completing combustion.The round exit of high temperature swirling eddy from the bilateral furnace wall of cyclone firing district A, the round exit (see figure 3) on (see figure 2) or the one-sided furnace wall enters bilateral or one-sided flue.Pass the minimizing of primary air flow of fuel-rich regions (being A district and B district) in coal seam and the reduction of wind speed, greatly reduce flying dust concentration in the flue gas, suppressed the generation of nitrogen oxide effectively, and the existence of cyclone firing district A, set up the circulating combustion mechanism of flying dust, strengthened smoke medicining dust-removing effect in the stove.

Claims

1, a kind of eddy flow chimney arch moves gasification fractional combustion grate furnace, by mobile grate, furnace bin, headwall is formed, it is characterized in that: combined furnace arch all covers mobile grate, combined furnace arch is from front to back successively by vertical section a, arc section b, preceding horizontal segment c, level inclination is 30---45 ° tilting section d, back horizontal segment e forms, water conservancy diversion arch below the combined furnace arch is upright furnace wall, it is divided into the combustion chamber primary zone B at rear portion, burning-out zone C and anterior cyclone firing district A, there is round exit to lead to bilateral or one-sided flue on the bilateral furnace wall of cyclone firing district A or the one-sided furnace wall, primary zone B and burning-out zone C communicate with cyclone firing district A through the tangential passage of water conservancy diversion arch upper edge, in the mobile grate of primary zone B and burning-out zone C scope, be provided with several fire grate air inlets, on the furnace wall of the both sides of primary zone B, be provided with the overfiren air port of two rows unequal section, be provided with several in the combined furnace arch vertical section furnace wall in cyclone firing district A to several ten tertiary air orifices, the headwall of the one-sided round exit of cyclone chamber is provided with the rotating jet tertiary air orifice.