CN105351916A

CN105351916A - Coal burning boiler with repeated combustion mode

Info

Publication number: CN105351916A
Application number: CN201510912994.9A
Authority: CN
Inventors: 胡金柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2016-02-24

Abstract

The invention relates to a coal burning boiler with a repeated combustion mode. A combustion process of the boiler has the following flows: after slag and coals are mixed in a coal adding port for fully covering a grate, firewoods are added in a front hearth and a back hearth; after the firewoods are burnt, bituminous coals are added; when the coals in the front hearth are primarily burnt, coking smoke is reduced, and the coals are fiery without smoke, a fire hook is used for pushing to the back hearth for secondary combustion and smoke removal; the smoke after secondary combustion upwards enters a smoke removing plate channel for ternary combustion from the back hearth; the stubborn smoke after ternary combustion upwards enters a secondary combustion chamber, and secondary hot wind is given to perform the fourth combustion and the smoke removal; the smoke from the secondary combustion chamber is ejected to a heat resisting plate at the bottom of a second arch for the fifth baking combustion and smoke removal; the smoke after the fifth combustion is fed with air by the third time through a first arch at the top of the front hearth for the sixth baking combustion and smoke removal; and black smoke generated by the boiler is fully burnt and converted to heat energy. The coal burning boiler realizes the dispersed combustion of raw coals, selects no coal types, generates no black smoke, prominently saves the energy, and reduces the emission to reach the standard.

Description

The coal-burning boiler of repeated combustion mode

Technical field

The present invention relates to coal-burning boiler field, be specifically related to a kind of coal-burning boiler of repeated combustion mode.

Background technology

Existing coal-burning boiler continues traditional directly burning type combustion system always, and particularly flow freely into communication port after the unordered burning of the coal of hand-fired boiler and enter body of heater, quantity of heat given up is low, heat exchanger effectiveness is low, the means and the combustion system of this boiler does not eliminate smoke, unordered discharge, seriously polluted.In recent years, along with people are to the enhancing of environmental protection consciousness, and the energy-saving, emission-reducing, environment friendly policy that country puts into effect, with serious pollution coal-burning boiler is prohibited use.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of coal-burning boiler of repeated combustion mode, and this boiler changes traditional combustion system, and achieve the problem of coal-burning boiler not over-emitting black exhaust, obvious energy conservation, reduces discharging up to standard, and the thermal efficiency of boiler is up to more than 80%.

Technical scheme of the present invention: a kind of coal-burning boiler of repeated combustion mode, the burning process flow process of this boiler is as follows: (1) from coal feeding hole slag mixed with coal cinder fire grate is covered comprehensively after add firewood to expansion furnace and rearmounted burner hearth, based on rearmounted burner hearth, well until firewood and add bituminous lump coal, equally based on rearmounted burner hearth; (2) until expansion furnace coal through just combustion coking flue gas reduce and coal red as fire smokeless time push it against rearmounted burner hearth with poker and make second time and burn and eliminate smoke; (3) enter the smoke board passage be made up of fire-resistant heat-storing material on the flue gas after second time burning is straight by rearmounted burner hearth to be able to burn and eliminate smoke for the third time; (4) enter the second combustion chamber on the obstinate flue gas after third time burning is straight again and give secondary hot-air and be able to the 4th time and burn and eliminate smoke; The refractory plate of flue gas top bottom backhaul dividing plate emerged in (5) second combustion chambers carries out the 5th baking and burns and be able to three hot wind for combustion supportings; Flue gas after (6) the 5th burnings is roasted burning smoke by expansion furnace arch bar by the 6th time again, and the black smoke that so far boiler produces is sufficiently burned and is converted into heat energy.

Further, the smoke board described in step (3) is arranged on the bracket that surrounded by furnace wall.

Further, described smoke board, expansion furnace arch bar, backhaul dividing plate are compositely suppressed to form by refractory material that is fire-resistant, accumulation of heat.

The present invention compared with prior art has following beneficial effect: it is insufficient that the present invention thoroughly solves traditional fired coal combustion, the problem of highly energy-consuming, thick spacious discharge, achieve scatter fire of raw coal and do not select coal not over-emitting black exhaust, the black smoke produced is sufficiently burned and has transformed heat energy, effectively improve the thermal efficiency of boiler, obvious energy conservation, reduces discharging up to standard.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is the scheme of installation of smoke board in the present invention.

In figure: 1-fire grate, the rearmounted burner hearth of 2-, 3-expansion furnace, 4-smoke board, 5-L shape second heat air holes, 6-second combustion chamber, 7-tri-warm-air pipes, 8-backhaul dividing plate, 9-expansion furnace arch bar, 10-coal feeding hole.

Detailed description of the invention

Below in conjunction with Figure of description, the present invention is further illustrated, understands better to enable those skilled in the art.

A kind of coal-burning boiler of repeated combustion mode, as shown in Figure 1 and Figure 2, the burning process flow process of this boiler is as follows: (1) from coal feeding hole 10 slag mixed with coal cinder fire grate 1 is covered comprehensively after add firewood to expansion furnace 3 and rearmounted burner hearth 2, based on rearmounted burner hearth 2, well until firewood and add bituminous lump coal, equally based on rearmounted burner hearth 2; (2) until expansion furnace 3 coal through just combustion coking flue gas reduce and coal red as fire smokeless time push it against rearmounted burner hearth 2 with poker and make second time and burn and eliminate smoke; (3) enter passage that the smoke board 4 be made up of fire-resistant heat-storing material formed on the flue gas after second time burning is straight by rearmounted burner hearth 2 to be able to third time and to burn and eliminate smoke; (4) enter the second combustion chamber 6 on the obstinate flue gas after third time burning is straight again and give secondary hot-air and be able to the 4th time and burn and eliminate smoke; The refractory plate of flue gas top bottom backhaul dividing plate 8 emerged in (5) second combustion chambers 6 carry out the 5th time baking burning and by three hot wind for combustion supportings; Flue gas after (6) the 5th burnings again by expansion furnace arch bar 9 by the 6th barbecue burning smoke, the black smoke that so far boiler produces is sufficiently burned and is converted into heat energy, achieves raw coal heat radiation and does not select the object of coal not over-emitting black exhaust.

Claims

1. a coal-burning boiler for repeated combustion mode, is characterized in that the burning process flow process of this boiler is as follows:

From coal feeding hole slag mixed with coal cinder fire grate is covered comprehensively after add firewood to expansion furnace and rearmounted burner hearth, based on rearmounted burner hearth, until firewood good after add bituminous lump coal, equally based on rearmounted burner hearth;

Until expansion furnace coal through just combustion coking flue gas reduce and coal red as fire smokeless time push rearmounted burner hearth to poker and make second time and burn and eliminate smoke;

(3) enter the smoke board passage be made up of fire-resistant heat-storing material on the flue gas after second time burning is straight by rearmounted burner hearth to be able to burn and eliminate smoke for the third time;

(4) enter secondary combustion chamber on the obstinate flue gas after third time burning is straight again and give secondary hot-air and be able to the 4th time and burn and eliminate smoke;

(5) refractory plate of flue gas top bottom the second chimney arch that secondary combustion chamber is emerged carry out the 5th time baking burning and by three hot wind for combustion supportings;

Flue gas after (6) the 5th burnings is roasted burning smoke by the chimney arch at expansion furnace top by the 6th time again, and the black smoke that so far boiler produces is sufficiently burned and is converted into heat energy.

2. the coal-burning boiler of repeated combustion mode according to claim 1, is characterized in that the smoke board described in step (3) is arranged on the bracket that surrounded by furnace wall.

3. the coal-burning boiler of repeated combustion mode according to claim 1, is characterized in that described smoke board, the first chimney arch, the second chimney arch are compositely suppressed to form by refractory material that is fire-resistant, accumulation of heat.

4. the coal-burning boiler of repeated combustion mode according to claim 1, is characterized in that described boiler adds secondary hot-air and three hot blasts very cleverly.