CN2282662Y - 1 ton 0.7 Mpa vertical water-tube double-layer fire grate boiler - Google Patents

Abstract

The utility model relates to a 1 ton 0.7 Mpa vertical water tube double-layer fire grate boiler. A double-bent water tube, a smoke box and a smoke box channel are installed and fixed at the periphery of a shell grate, and a water cooling fire grate is installed and fixed at the center in an internal grate. The sides of the shell grate and the internal grate are provided with an upper grate door, a center grate door and a throat ring; the lower ends of the shell grate and the internal grate are connected fixedly with U-shaped lower foot rings; the lowest part of the boiler is provided with a lower layer fire grate and a base. The utility model has the advantages of reasonable design, novel structure, sufficient fuel burning, high thermal efficiency, good effect of smoke elimination and dust removal, environmental protection, low cost, material and energy saving, and advanced technical performance.

Description

The 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer

The utility model relates to the heater in the mechanical engineering, relates in particular to a kind of life steam boiler.

As everyone knows, the management of national pressure to boiler, capacity, specification, parameter and requirement are extremely strict, the vertical boiler of existing 1 ton of this specification of 0.7Mpa has vertical big horizontal water tube, vertical little horizontal water tube, vertical horizontal smoke pipe, vertical straight water pipe boiler etc. at present, wherein vertical big tranverse water tube boiler and Cochran boiler are subjected to structural limitations because heating surface is arranged, exhaust gas temperature height, the thermal efficiency only are about 40%; Though vertical little tranverse water tube boiler heating surface is relatively large, the water circulation is better, and little horizontal water tube diameter is little, easy scaling, especially bottom two drainpipe calorific intensity height, easily fouling scaling loss, vertical straight water pipe boiler water cycle is good, last lower perforated plate is under water, and is can be because of fouling not overheated and solve and avoided resembling the difficult shortcoming of removing of fouling the vertical little horizontal water tube, but its thermal efficiency is not high, making steel consumption is big, cost is high, the use coal consumption is big, worker's energy weak effect, and dust stratification is easy-clear not.

The purpose of this utility model aims to provide that a kind of water circulates, water pipe is less scaling, fuel combustion is abundant, heating surface area is big, the thermal efficiency is high, smoke abatement and dust control and environment protecting is good, compact conformation, saving material, the 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer that cost is low.

The technical solution of the utility model is: this 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer has shell, flue, base, get a foothold and enclose, water-cooled grate, lower floor's fire grate, two curved water pipes, upper furnace door, middle fire door, the aditus laryngis circle, smoke box, the smoke box passage, smoke box and smoke box passage are fixed on the shell periphery, two curved water pipes two ends are fastened on the shell, and place in the smoke box, smoke box passage lower end one side and shell, aditus laryngis circle on the flue connects, the flue middle part is mounted with water-cooled grate, flue, the shell lower end is connected and fixed the circle of getting a foothold, the base internal support is equipped with lower floor's fire grate, upper furnace door, middle fire door is respectively in the shell of water-cooled grate upper and lower, on the flue.

The utility model is compared with prior art, adopt double-layer grate, fuel combustion is abundant, and flue and water-cooled grate are formed radiation heating-surface jointly, has greatly improved the thermal efficiency, reach more than 70% through thermal testing, adopt two curved water pipes, water circulates, and heating surface area is big, smoke medicining dust-removing effect is good, through twice dedusting, its flue dust test lingemann blackness is less than 1 grade, and smoke dust discharge concentration is lower than a national class regional standard, the multiple coal of this boiler burning, adaptability is strong, goes back burning caking property coal, the utility model compact conformation, floor space only is 50% of 1 ton of horizontal boiler, install easily, can save the mounting cost more than 30%, water pipe is less scaling, and maintenance is cleaned convenient, little power consumption, adopt force ventilation, alleviated fireman's labour intensity, make this boiler and compare with 1 ton of horizontal boiler, save steel about 30%, save other materials about 80%.

Fig. 1 is the utility model structure longitudinal sectional view

Fig. 2 is the utility model profile schematic diagram

The utility model is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1, the utlity model has shell (6), flue (4), base (7), get a foothold and enclose (1), water-cooled grate (12), lower floor's fire grate (8), two curved water pipes (5), upper furnace door (3), middle fire door (2), aditus laryngis circle (10) and smoke box (13) and smoke box passage (14) (referring to Fig. 2), smoke box (13) and smoke box passage (14) are fixed on shell (6) and go up periphery, two curved water pipes (5) two ends are fastened on the shell (6), flue (4) middle part is mounted with water-cooled grate (12), flue (4), shell (6) lower end is connected and fixed the circle (1) of getting a foothold, base (7) internal support is equipped with lower floor's fire grate (8), upper furnace door (3), middle fire door (2) is respectively in the shell (6) of water-cooled grate (12) upper and lower, on the flue (4).Water-cooled grate (12), lower floor's fire grate (8) and flue (4), the circle (1) of getting a foothold has been formed the internal combustion type combustion chamber, flue thickness is 14mm, external diameter ∮ 1328mm, high 1570mm, adopt the 20g steel plate to make, guaranteed the abundant burning of fuel, flue tube structure provides enough burning time and spaces for the combustible that flies to overflow, flue (4) is formed radiation heating-surface with water-cooled grate (12), water-cooled grate (12) is made up of 11 water pipes, every water pipe external diameter and wall thickness are ∮ 63.5 * 5mm, spacing 26.5mm between pipe, become radially welding with flue, water-cooled grate adopts bend pipe, overcome rigid connection and easily burnt curved shortcoming, with have four clean-out openings (11) on the water-cooled grate corresponding shells of (12) one ends (6), so that clean water-cooled grate (12) pipe, water-cooled grate (12) is formed double-layer grate with lower floor's fire grate (8), lower floor's fire grate (8) is the cast iron manufacturing, both be suitable for force ventilation, be suitable for gravity-flow ventilation again, there is a upper furnace door (3) water-cooled grate (12) top, operate as normal is opened often, is the inlet of coal and air, and the middle fire door (2) of water-cooled grate (12) below is normally closed when work, open when having only igniting and scarfing cinder, the lower furnace door that has a deashing to use on the foundation of lower floor's fire grate (8) below, crack during operation, the coal row of lower floor (8) goes up the required air of coke particle burning and enters thus.Aditus laryngis circle (10) is arranged between water-cooled grate (12) and the lower floor's fire grate (8), becomes 90 ° of angles with middle fire door (2), is convenient to flue gas and forms disturbance in burner hearth, in order to burning, aditus laryngis circle (10) is oval, long axis length 420mm, minor axis length is 320mm, and thickness is 16mm.The circle (1) of getting a foothold is the U type, and the upper end inwall connects flue (4), and outer wall connects shell (6), and thickness is 16mm, internal diameter ∮ 1300mm, and spacing 112mm, hot pressing inside radius R40mm adopts the 16Mng steel plate to make.Two curved water pipes (5) are welded on shell (6) and go up form convection heating surface, are bent by the boiler tube of 127 ∮ 57 * 3.5mm to form, and three one group, stagger arrangement is arranged, to improve coefficient of convective heat transfer.Shell (6) design thickness is 12mm, external diameter is ∮ 1524mm, adopt the 20g steel plate to make, stay bolt round steel (9) is installed around fire door (2,3) and aditus laryngis circle (10), stay bolt round steel two ends are separately fixed on shell and the flue, stay bolt round steel diameter is ∮ 25mm, rear smoke chamber (15), the deduster (16) of smoke box (13) and flue, and air-introduced machine (17), chimney (18) connect.

Operation principle:

During boiler operatiopn, coal burns on water-cooled grate, and air is entered by upper furnace door, preheating, the drying of coal-fired layer below new stoking is subjected to, fire burns, unburnt coke of coal grain Buddhist monk of some oneself combustion at gravity with manually disclose and allocate under the usefulness, fall on lower floor's fire grate burning away.Flue gas compiles between last lower fire grating, enters smoke box by the aditus laryngis circle, and flue gas is divided into two strands in smoke box, and each burns the two curved water pipes of 180 ° of transversal flows and comes heat exchange, and flue gas flow rate is slower, and a part of flue dust just deposits in smoke box.Form first dedusting, the flue gas after the dedusting enters deduster again after rear smoke chamber compiles, carry out the dedusting second time, and flue gas enters the chimney discharge through air-introduced machine after twice dedusting.

Claims (7)

1, a kind of 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer, has shell (6), flue (4), base (7), get a foothold and enclose (1), it is characterized in that also having water-cooled grate (12), lower floor's fire grate (8), two curved water pipes (5), upper furnace door (3), middle fire door (2), aditus laryngis circle (10), smoke box (13), smoke box passage (14), smoke box (13) and smoke box passage (14) are fixed on shell (6) periphery, two curved water pipes (5) two ends are fastened on the shell (6), and place in the smoke box (13), smoke box passage (14) upper end connects with smoke box (13), smoke box passage (14) lower end one side and shell (6), aditus laryngis circle (10) on the flue (4) connects, flue (4) middle part is mounted with water-cooled grate (12), flue (4), shell (6) lower end is connected and fixed the circle (1) of getting a foothold, base (7) internal support is equipped with lower floor's fire grate, upper furnace door (3), middle fire door (2) is respectively in the shell (6) of water-cooled grate (12) upper and lower, on the flue (4).

2, the 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer according to claim 1 is characterized in that water-cooled grate (12), lower floor's fire grate (8) and flue (4), gets a foothold and enclose (1) composition internal combustion type combustion chamber.

3, the 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer according to claim 1 is characterized in that flue (4) thickness is 14mm, external diameter ∮ 1328mm, and high 1570mm adopts the 20g steel plate to make.

4, the 1 ton of vertical water pipe double-layer grate of 0.7Mpa handwarmer according to claim 1 is characterized in that water-cooled grate (12) is made up of 11 water pipes, and every water root external diameter and wall thickness are ∮ 63.5 * 5mm, and spacing is 26.5mm between pipe, becomes radially welding with flue.

5, the 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer according to claim 1, the circle (1) that it is characterized in that getting a foothold is the U type, the upper end inwall connects flue (4), outer wall connects shell (6), thickness 6mm, internal diameter ∮ 1300mm, spacing 112mm, hot pressing inside radius R40mm adopts the 16Mng steel plate to make.

6, the 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer according to claim 1 is characterized in that two curved water pipes (5) are bent by the boiler tube of 127 ∮ 57 * 3.5mm to form that three one group, stagger arrangement is arranged.

7, the 1 ton of vertical water pipe double-layer grate of 0.7MPa handwarmer according to claim 1 is characterized in that shell (6) thickness is 12mm, and external diameter is ∮ 1524mm, adopts the 20g steel plate to make.