CN2138250Y - Heating furnace with chain grate combusting chamber - Google Patents

Abstract

The utility model relates to a medium and large-sized steel plate heating furnace with a chain fire grate combusting chamber, which is used for heating end sockets and pipe plates of boilers and pressure vessels. A fire grate of a combustion chamber of the utility model uses a light chain fire grate assembled by big fire grate sheets with high strength, the coal feeding direction and the material feeding direction of the utility model are distributed vertically, and a single air chamber is arranged; a ramp type front arch and a step type arc-shaped rear arch are arranged above the fire grate; a furnace body uses an arc-shaped big arch with the big span of 60 DEG. The wall corner of a heating chamber is in an arc shape to make fume with high temperature rotate, and flue inlets are evenly distributed at the bottom of the heating chamber and are communicated with a main flue. The furnace has the advantages of even heating, better heating quality, high efficiency, low energy consumption and standard environmental protection parameters. Besides, the biggest productivity of the utility model can reach 3800 Kg per hour.

Description

Heating furnace with chain grate combusting chamber

The utility model is a kind of coal-fired cell-type steel plate of traveling-grate stoker heating furnace that is used for boiler and pressure vessel, large-sized end enclosure, tube sheet heating.

At present, China's coal-fired industry stove combustion technology falls behind, particularly the steel plate heating furnace, owing to its steel plate approaches greatly, require heat time heating time short, have a narrow range of temperature, its difficulty is much larger than other heating furnace, existing steel plate heating furnace, because chamber structure is unreasonable, no rear arch makes the fuel can not completing combustion, over-emitting black exhaust, environmental protection does not reach requirement, and heating clamber design is unreasonable, and flue gas can't rotate and heat inequality, cause heating furnace ubiquity heating quality poor, heat time heating time is long, and flue dust is not up to standard, and production environment is abominable, problems such as energy consumption height can not satisfy boiler and pressure vessel head, tube sheet heating and environmental protection requirement.

The purpose of this utility model provides in the coal-fired cell-type steel plate of traveling-grate stoker that a kind of heating quality is good, efficient is high, energy consumption is low, the environmental protection parameter reaches 1 grade of requirement, Large-scale Heater.

The utility model is achieved in that according to the designed coal-fired cell-type steel plate of the traveling-grate stoker heating furnace of big backhaul jet rotation heating principle, it is made of combustion chamber, heating clamber, flue and body of heater, the fire grate of combustion chamber adopts the light-duty traveling-grate stoker of high strength bulk fire grate segment assembling, advancing the coal direction is arranged vertically with heating steel plate feedstock direction, fire grate has air compartment, the fire grate top is provided with ramp type face arch and rear arch, and is provided with overfire air device; The big arch of body of heater adopts large span arc arch, increases the big pitch of arch and turns over the burner height, makes to form a big burnt zone between big arch and the rear arch, makes fuel combustion complete; The arc corner is adopted in the corner of heating clamber, forms swirling eddy after making high-temperature flue gas enter heating clamber, and uniform adjustable flue entrance communicates with flue collector at the bottom of the chamber.

This heating furnace since the combustion chamber adopted the ramp type face arch, and appropriate design rear arch, make before and after the arch formed aditus laryngis speed reasonable, formed big burnt zone between rear arch and the big arch, overheavy firing, and form big backhaul jet, make full combustion of fuel, the efficiency of combustion height, and make the high-temperature flue gas of heating clamber form swirling eddy, it is good that furnace temperature can reach 1200 ℃ of heating qualities, steel plate has a narrow range of temperature, homogeneous heating, and also heating is fast, production efficiency height, maximum capacity can reach 3800 kilograms/hour.Energy consumption is low, and more energy-conservation 15～30% than the manual coal that burns, labour intensity is little.This stove institute discharged flue gas, the compliance with environmental protection requirements chimney only emits white cigarette, lingemann blackness＜1 grade, dust concentration≤200 milligram/mark rice ³, noise≤85 decibel.This heating furnace is adapted to end socket, the tube sheet heating usefulness of industries such as boiler, pressure vessel, chemical machinery, also can make other industry steel plate, forging heating stove.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is the coal-fired cell-type steel plate of a traveling-grate stoker heating furnace structure schematic diagram

With reference to Fig. 1, the coal-fired cell-type steel plate of traveling-grate stoker heating furnace designs according to big backhaul jet rotation heating principle, it is by the combustion chamber, heating clamber, flue and body of heater constitute, the fire grate of combustion chamber adopts the light-duty traveling-grate stoker (1) of high strength bulk fire grate segment assembling, advancing the coal direction is arranged vertically with heating steel plate feedstock direction, fire grate has the independent air compartment of four or more totally enclosed type steel construction, one time hot blast enters the fuel bed air blast through independent air compartment by the fire grate hole, steady to guarantee fuel combustion, institute's required airflow size is by each air compartment independent regulation, guarantee that air-supply evenly, overcomes air leakage phenomena.Fire grate two sides are provided with anti-clinker box, prevent coking.The fire grate top is provided with ramp type face arch (3) and rear arch (6), rear arch (6) adopts staged camber rear arch (6), with face arch (3) reasonable Arrangement sagitta, make the rear arch flue gas keep optimum speed, and the formed aditus laryngis flue gas of arch also is optimum speed before and after making, make a large amount of high-temperature flue gas and the horizontal backfire of red-hot carbon granule to being ejected into the combustion zone, overheavy firing, and form big backhaul jet, on the body of heater on face arch (3) top, be provided with overfire air device (2), the big arch of body of heater adopts 50 °～70 ° arc arches (5) of large span, present embodiment adopts 60 ° of arc arches (5), increase the big pitch of arch and turn over burner height (H), make and form a big burning-out zone (7) flue gas between big arch (5) and the rear arch (6) by secondary wind (2) oxygen supply, stir, in this district (7) secondary completing combustion, further eliminate black smoke and gravitational settling dedusting, having overcome existing heating furnace does not have burnt zone and the phenomenon and the shortcoming of incomplete combustion.For making high-temperature flue gas at heating clamber (8) rotation heating steel plate, impel homogeneous heating, arc corner (11) is adopted in its corner, uniform adjustable flue entrance (10) at the bottom of the chamber, flue entrance is square, and available refractory brick is regulated the area of inlet, and flue entrance (10) communicates with flue collector (9).But equal gravitational dust collection in heating clamber and the flue collector.Adopted behind the flue collector (9) that the cigarette temperature falls in the high screw thread shell and tube cooler of heat transfer efficiency, hot water can fully utilize, adopted wind of efficient tubular air preheater preheating, wind-warm syndrome can reach 120 °～150 ℃, can save energy.Adopt the further dedusting of novel water-cooled multicyclone.Adopted on the belt conveyor coal and loop chain type scraper slagging machine to slag tap for reducing labour intensity.

Claims (5)

1, a kind of coal-fired cell-type steel plate of traveling-grate stoker heating furnace that is used for boiler end and pressure vessel head, tube sheet heating, it is made of combustion chamber, heating clamber, flue, body of heater and cooling and dedusting system, the light-duty traveling-grate stoker (1) that it is characterized in that the fire grate employing high strength bulk fire grate segment assembling of combustion chamber, advancing the coal direction is arranged vertically with heating steel plate feedstock direction, fire grate has air compartment, the fire grate top is provided with ramp type face arch (3) and rear arch (6), and is provided with overfire air device (2); The big arch of body of heater adopts the arc arch (5) of large span, forms a big burnt zone (7) between big arch (5) and the rear arch (6); Camber corner (11) is adopted in the corner of heating clamber (8), and uniform adjustable flue entrance (10) at the bottom of the chamber communicates with flue collector (9).

2, heating furnace according to claim 1 is characterized in that air compartment adopts the independent air compartment (4) of four or more totally-enclosed steel construction.

3, heating furnace according to claim 1 is characterized in that two sides of fire grate (1) are provided with anti-clinker boxs.

4, heating furnace according to claim 1 is characterized in that big arch (5) is 50 ° of-70 ° of cambers arches.

5, heating furnace according to claim 1 is characterized in that rear arch (6) adopts staged camber rear arch.

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