CN2159500Y - Multiple reverse running boiler with normal pressure - Google Patents

Abstract

The utility model relates to a reverse barrel type multiple returns boiler with no pressure. The utility model is characterized in that a coal bin 12 is arranged at the center part of a hearth, the shape of the coal bin 12 is similar to a reverse water barrel whose bottom is big and opening is small, and the coal bin 12 is formed into a double-layer steel plate structure. The coal feeding opening 18 of the coal bin 12 is arranged on a bit above the middle waist of the boiler, and is inserted at the top part of the coal bin 12 in an oblique way. The lower part of the coal bin 12 is provided with a double-layer fire grate, namely, a water pipe fire grate 13 and a bottom layer fire grate 15. The boiler adopts a multilayer boiler barrel, a water filling disk 4, and an intermediate water disk 11 from inside to outside, and the multilayer boiler barrel, the water filling disk 4, and the intermediate water disk 11 are communicated with each other. The boiler has the advantages that the inner part of the boiler with the smallest volume is provided with the biggest heating area, which causes the structure of the boiler to be compacter, the thermal efficiency to be higher, and the heating capacity to be bigger.

Description

Multiple reverse running boiler with normal pressure

The utility model relates to boiler plant, is a kind of many backhauls of button cartridge type pressure-less boiler specifically.

In recent years, northern China turns to the heating installation heating from directly warming oneself with stove away from small towns and enterprises and institutions' warming of big and medium-sized cities.Its difficulty that faces is, the connection sheet used pipeline that heats is costly, can't buy again to be fit to the good miniature boiler of performance that medium and small unit uses.In traditional vertical boiler, the boiler of some fixed grate combustion in right direction, not only the thermal efficiency is low, and it is seriously polluted, as the two backhaul multitubular boilers of vertical boiler with horizontal water tubes, vertical horizontal multitubular boiler, vertical straight water pipe boiler, vertical straight multitubular boiler, vertical bent water tube boiler, vertical single fire grate etc., these boilers have been regarded as the row eliminated.Also have some to be prescribed in addition and only allow to burn anthracitic miniature boiler, because its coal combustibility is poor, the unit that has uses burning bituminous coal instead, and is seriously polluted.The two backhaul multitubular boilers of in the recent period popular vertical double grate, the straight multitubular boiler of vertical double grate though all belong to backfire formula boiler, have been realized smoke abatement and dust control substantially, and the thermal efficiency is still undesirable.

The purpose of this utility model is the defective that exists at present various vertical boilers, improves chamber structure, makes to arrange maximum heating surface area in the boiler volume of minimum, designs a kind of more compact structure.The thermal efficiency is higher, the boiler that heat capacity is bigger.

The utility model be achieved in that many backhauls of button bucket formula pressure-less boiler mainly by ring flange 1, outlet flue 2, cleaning door 3, go up water pond 4, tube connector 5, hot water outlet 6, central straight water pipe 7, interior drum 8, middle drum 9, outer drum 10, middle level water pond 11, coal bin 12, water pipe furnace grate 13, water return outlet 14, bottom fire grate 15, boiler bottom shrouding 16, base angle stirrup 17, coal feeding hole 18, see poke fire door 19, shoot door 20,21,22 etc. of fire and form.Coal bin 12 is located at the flue center, the water drum that shape as big young back-off at the bottom of, and coal bin 12 be a double-layer steel plate structure, the water layer between two steel plates separates the inner combustion chamber with close flue of coal bin.The coal feeding hole 18 of coal bin 12 is located at the boiler middle part of the side on the upper side, and oblique cutting is contained in the top of coal bin 12.The below of coal bin 12 is provided with double-deck coal row, and the water pipe furnace grate 13 of distribution main coal seam is positioned at the top of bottom fire grate 15.The area of water pipe furnace grate 13 increases than suitable with it boiler area and is twice, and the ratio of the area of this furnace water pipe fire grate 13 and boiler cross section is 0.8:1, and generally the ratio of boiler is 0.4:1.Water pipe furnace grate 13 has a segment distance h with coal bin 12 lower edge interlayers, suitable apart from k between h value and coal bin 12 barrels and the inboard wall of furnace.Fire grate 15 is combined by several comb type list fan fire grates at the end.On single fan fire grate rotating shaft and turning handle are arranged.In order to make the boiler overall sealing performance good, help adjusting fire-sealing time, boiler bottom is equipped with boiler bottom shrouding 16, the shoot door 20,21,22 of body of heater, see poke fire door 19 and coal feeding hole 18 of fire and all adopt double-deck screwing type hermatic door, the top layer door is a frame-type, around the nexine door asbestos bed course is arranged, be connected on the door of top layer with swivel bolt and pin.In order to increase heating surface area, except that adopting button cartridge type coal bin 12 and large tracts of land water pipe furnace grate, this boiler also adopts multilayer drum from inside to outside, increases the flue stroke.Water layer between the double-layer plate of central straight water pipe 7 bottoms and coal bin 12 communicates, and top communicates with last water pond 4 by tube connector 5, and interior drum 8 bottoms communicate with middle level water pond 11, and top links to each other with middle drum 9 by tube connector 5; Middle drum 9 bottoms link to each other with middle level water pond 11 by tube connector 5, and top communicates with last water pond 4 and outer drum 10 by tube connector 5.Hot water outlet 6 is located at the top of outer drum 10, and water return outlet 14 is located at the flue bottom, and flue is connected as a single entity with outer drum.Cleaning door 3 is located on the conical surface of boiler top.The lower part of water pipe furnace grate 13, bottom fire grate 15 and multilayer drum is equipped with shoot door 20,21,22 respectively; Seeing the fire door 19 that pokes fire is located between coal bin 12 bottoms and the water pipe furnace grate 13.

Button cartridge type coal bin structure makes the surfaces externally and internally of coal bin increase heating surface area more than one times in flue.The structure of coal bin and coal feeding hole has guaranteed the continuity of fuel supplement, and air also can enter from coal filling hole and make coal-fired oxide layer obtain oxygen from upper and lower both direction, and oxidated layer thickness strengthens, and reducing zone thickness reduces even disappears, and makes burning vigorous.If coal filling hole is closed or coal filling hole air intake deficiency, coal bin can form a gas generating chamber, produces carbon monoxide, increases the length of flame, improves combustion position.The double-layer grate structure not only has the coal-fired fully strong point of burning, smoke abatement and dust control, because the water pipe furnace grate area increases and is twice, the fuel that the boiler of same volume size was burnt in the unit interval doubles simultaneously.

Because water pipe furnace grate and coal bin lower edge have a segment distance, air is entered by coal feeding hole, and new stoking layer is last, and flame is from up to down rolled over from inside to outside again, is the burning of backfire formula.Coal seam near water pipe furnace grate replenishes air by the below, and flame is confluxed with backfire flame by oblique radiation around the middle mind-set, belongs to the combustion in right direction burning.Its whole fuel all are to subside from the backfire oxide layer and the red-hot coke that comes, and the volatilization composition is separated out already and burnt, and institute is so that burning over-emitting black exhaust not only makes burning condition better on the contrary.

The bottom fire grate is movable with switch, makes to remove lime-ash conveniently, and is laborsaving, and can local ash disposal.

Double-deck screwing type fire door has avoided conventional oven door to be not closed completely banking up a fire the drawback of difficulty.

Adopt multihearth tube from inside to outside that flue gas flow is prolonged.In the embodiment shown in the utility model, the flue flow process is high three times of stove, and flue gas washes away two horizontal heating surface areas of 5,6 the vertical heating surface areas and one end of top in three backhaul flues.

In a word, the utility model has been realized arranging maximum heating surface area in the boiler volume of minimum, has cancelled useless heating surface area, makes furnace construction compact more, the purpose that the thermal efficiency is higher, heat capacity is bigger.

Accompanying drawing is an embodiment of the present utility model.

Fig. 1 is the elevation cross-sectional view of button cartridge type three backhaul pressure-less boilers;

Fig. 2 is the right side view profile of Fig. 1.

Claims (1)

1, a kind of many backhauls of button cartridge type pressure-less boiler, mainly constitute by outlet flue, shoot door, delivery port, water return outlet, fire grate, drum, coal bin, coal feeding hole etc., it is characterized in that coal bin (12) is located at the flue center, the water drum that shape as big young back-off at the bottom of, be double-layer steel plate structure, combustion chamber coal bin is inner and near flue of the water layer between two steel plates separates; The coal feeding hole (18) of coal bin (12) is located at the boiler middle part of the side on the upper side, and oblique cutting is at the top of coal bin (12); The below of coal bin (12) is provided with double-layer grate; Between water pipe furnace grate of distribution main coal seam (13) and coal bin (12) lower edge segment distance h is arranged, suitable between the barrel of h value and coal bin (12) and the inboard wall of furnace apart from k; Bottom fire grate (15) is combined by several comb type list fan fire grates; Boiler adopts multilayer drum from inside to outside, and the water layer between the double-layer plate of central straight water pipe 7 bottoms and coal bin (12) communicates, and top communicates with last water pond (4) by tube connector (5); Interior drum (8) bottom communicates with middle level water pond (11), and top links to each other with middle drum (9) by tube connector (5); Middle drum (9) bottom links to each other with middle level water pond (11) by tube connector (5), and top communicates with last water pond (4) and outer drum (10) by tube connector (5); Hot water outlet (6) is located at the top of outer drum (10), and water return outlet (14) is located at the flue bottom, and cleaning door (3) is located on the conical surface of boiler top; The bottom of water pipe furnace grate (13), bottom fire grate (15) and multilayer drum is equipped with shoot door (20), (21), (22) respectively; Seeing the fire door (19) that pokes fire is located between coal bin (12) and the water pipe furnace grate (13).

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