CN2270930Y - Double-deck grate vertical front burning non-pressure boiler - Google Patents

Abstract

The utility model relates to an improved vertical forward-combusting non-pressure boiler with double-layer fire grate. The lower part of the interior of an oblong interlayer water sleeve type boiler body is provided with a combustion device which is composed of a lower layer cast iron fire grate, an upper layer water pipe fire grate, an upper combustion chamber and a lower combustion chamber. The upper part of the interior of the oblong interlayer water sleeve type boiler body is divided into a top water tank and a high-temperature smoke gas passage through an interlayer water sleeve type partition plate and a transverse partition plate. The high-temperature smoke gas passage is arranged on the lower part of the water tank. The interior of the water tank is provided with a heat exchanger which is composed of smoke pipe bundles. The interior of the high-temperature smoke gas passage is provided with a heat exchanger which is composed of water pipe bundles.

Description

The vertical pressure-less boiler that just burning of a kind of double-layer grate

The utility model is the vertical pressure-less boiler that just burning of a kind of improved double-layer grate, belongs to combustion apparatus.

The vertical pressure-less boiler that just burning of a kind of double-layer grate is disclosed in ZL94228568.9, it is to be body wall with heat exchange intermediate water shell type body of heater, be provided with double-layer grate in the combustion chamber, lower floor is a casting furnace grate, the upper strata is a water pipe furnace grate, the upper strata water pipe furnace grate is divided into up and down two upper combustion chamber of just burning and lower combustion chamber with the combustion chamber, and the outlet of upper combustion chamber is connected with heat-exchanger rig as heating surface.This patent is made up of one group of waney suspended-liner-type intercalated water sleeve as the heat-exchanger rig that most preferred embodiment provides.The coaxial heart mutual sheathing of each intercalated water sleeve also places the top of upper combustion chamber in the body of heater, and be communicated with the water-jacket typ body of heater by upper header and lower end circulating water pipe; Be formed in the circuitous many backhauls flue of wandering of annular between each water jacket by the method for opening mouth in suspended-liner-type intercalated water sleeve side.Its weak point is, because body of heater is the cylinder cylindrical structure, be cylinder type suspended-liner-type jacket structure for water as the heat-exchanger rig optimum structure of heating surface, and the difficulty of the heat-exchanger rig manufacturing of this structure and maintenance is bigger.

It is a kind of simple in structure that the purpose of this utility model is to provide, and makes maintenance than being easier to the vertical pressure-less boiler that just burning of the double-layer grate that the thermal efficiency is high.

Technical solution of the present utility model is: comprise heat exchange intermediate water shell type body of heater, lower floor's casting furnace grate, upper strata water pipe furnace grate, the upper strata water pipe furnace grate is divided into the combustion chamber the vertical pressure-less boiler that just burning of double-layer grate of lower combustion chamber and upper combustion chamber, it is characterized in that: heat exchange intermediate water shell type body of heater is rectangular build, by the diaphragm plate that is fixed on inboard wall of furnace body the water tank that is communicated with the water-jacket typ body of heater is made in the furnace chamber top, the smoke pipe tube bank is installed in the water tank, its two ends and body of heater body wall connect into tube plate structure, and the mouth of pipe stretches out the body of heater outside; Intermediate water shell type dividing plate places the upper combustion chamber top and connects into connectivity structure with intermediate water shell type body of heater; Between diaphragm plate and the intermediate water shell type dividing plate is the high-temperature flue gas passage, its smoke inlet is communicated with the outlet flue of upper combustion chamber, its exhanst gas outlet is connected with the smoke box that is located at the body of heater outside, and is connected by an end mouth of pipe of smoke box and smoke pipe tube bank, the other end mouth of pipe that smoke pipe is restrained is connected with the exhaust opening of body of heater; The water pipe tube bank is installed in the high-temperature flue gas passage, and its two ends and intermediate water shell type body of heater connect into connectivity structure.

The utility model has the advantages that because its burning structure still adopts the vertical pattern of just burning of double-layer grate, to have possessed all advantages of this type of furnace, promptly coal adaptability is strong, and grate heat release rate is big, sufficient combustion, and volume is little, characteristics such as thermal efficiency height; Owing to adopted rectangular build body of heater, be used to arrange that the intracavity space of heating surface also is the space of rectangular build, can arrange more flexibly by smoke pipe, the mixed type heating surface that water pipe is formed, compare with cylinder type suspended-liner-type jacket structure for water, not only simple in structure easy to manufacture, easy to maintenance, and the layout of heating surface is more reasonable, adopt the waterpipe type heating surface as the utility model earlier in the high-temperature flue gas section, flue-gas temperature adopts the fume tube type heating surface after reducing again, adopts the mixed type heating surface according to the segmentation of cigarette temperature like this, and it is compacter that whole heating surface is arranged, effective, the overall performance of boiler is significantly improved.

Following accompanying drawing has been described embodiment of the present utility model.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a B-B cutaway view among Fig. 1.

Describe in detail this reality is novel below in conjunction with accompanying drawing.Body of heater 15 of the present utility model has adopted rectangular build heat exchange intermediate water shell type body wall, in order to improve heat-resisting swelliong power, the corner angle limit of body of heater is all adopted arc transition or is made it to become octagon with a bit of straight flange transition, and combustion parts still adopts the vertical positive sintering structure of double-layer grate.As shown in FIG., lower floor's casting furnace grate 1 of combustion parts, lower combustion chamber 3, upper strata water pipe furnace grate 4, upper combustion chamber 5 and go up lower furnace door 18 and 2 etc., its structure is same as the prior art, and difference only is the cross section of the combustion chamber structure that is rectangle.12 is the exhaust outlet at body of heater top among the figure, and 19 is the admission port, and 21 is delivery port.

The structure of heating surface is in the utility model: intermediate water shell type dividing plate 6 places the upper combustion chamber top, and its two ends side weld connects and is fixed on wide of body of heater and goes up and is connected with intermediate water shell type body of heater, the outlet flue 16 of it and body of heater leptoprosopy one side formation upper combustion chamber.Body of heater chamber internal partition is the rectangular build space that is used to arrange heating surface more than 6, and the diaphragm plate 14 that is fixed by welding in inboard wall of furnace body is divided into two parts up and down with this space, is the water tank 10 that is communicated with the water-jacket typ body of heater above, is the high-temperature flue gas passage below it.Smoke pipe tube bank 11 is installed in the water tank 10, laterally arranges and parallel with wide of body of heater body, its two ends and body of heater leptoprosopy body wall connect into tube plate structure, and the mouth of pipe stretches out outside the body of heater.Water pipe tube bank 9 is installed in the high-temperature flue gas passage, and it is parallel with the body of heater leptoprosopy laterally to arrange, and wide the inwall in its two ends and body of heater connects into tube plate structure and make it to be communicated with the water-jacket typ body of heater.When the utility model used, high-temperature flue gas came out from the outlet flue 16 of upper combustion chamber, enters the high-temperature flue gas passage, after transversal flow water pipe tube bank 9, by the smoke box 7 of exhanst gas outlet 8 to the body of heater outside, enter smoke pipe tube bank 11 from smoke box 7 again, discharge from body of heater exhaust opening 13 at last.

The utility model is also at the top of upper combustion chamber, the radiation heating-surface 17 that is made of water pipe is installed below the intermediate water shell type dividing plate 6, and the two ends of water pipe and intermediate water shell type body of heater 15 connect into connectivity structure.In the present embodiment, it is to be made of a drainpipe, and lateral arrangement is parallel with the body of heater leptoprosopy, and two ends are weldingly fixed on wide inwall of body of heater, makes it to be communicated with the water-jacket typ body of heater.This structure more helps making full use of furnace space, improves the thermal efficiency.

The utility model also is equipped with secondary air channel 20 in lower combustion chamber 3, to improve combustibility by secondary wind, prevent over-emitting black exhaust, improves the thermal efficiency.

Claims (3)

1, the vertical pressure-less boiler that just burning of a kind of double-layer grate, comprise heat exchange intermediate water shell type body of heater (15), lower floor's casting furnace grate (1), upper strata water pipe furnace grate (4), the upper strata water pipe furnace grate is divided into lower combustion chamber (3) and upper combustion chamber (5) with the combustion chamber, it is characterized in that heat exchange intermediate water shell type body of heater (15) is rectangular build, by the diaphragm plate (14) that is fixed on inboard wall of furnace body the water tank (10) that is communicated with the water-jacket typ body of heater is made in the furnace chamber top, smoke pipe tube bank (11) is installed in the water tank, its two ends and body of heater body wall connect into tube plate structure, and the mouth of pipe stretches out the body of heater outside; Intermediate water shell type dividing plate (6) places the upper combustion chamber top and connects into connectivity structure with body of heater; Between diaphragm plate (14) and the intermediate water shell type dividing plate (6) is the high-temperature flue gas passage, its smoke inlet is communicated with the outlet flue (16) of upper combustion chamber, its exhanst gas outlet (8) is connected with the smoke box (7) that is located at the body of heater outside, and is connected by an end mouth of pipe of smoke box and smoke pipe tube bank (11), the other end mouth of pipe that smoke pipe is restrained is connected with body of heater exhaust opening (13); Water pipe tube bank (9) is installed in the high-temperature flue gas passage, and its two ends and intermediate water shell type body of heater (15) connect into connectivity structure.

2, the vertical pressure-less boiler that just burning of double-layer grate according to claim 1, the top that it is characterized in that upper combustion chamber, the radiation heating-surface (17) that is made of water pipe is installed below the intermediate water shell type dividing plate (6), and the two ends of water pipe and intermediate water shell type body of heater (15) connect into connectivity structure.

3, according to claim 1 or the vertical pressure-less boiler that just burning of 2 described double-layer grates, it is characterized in that in lower combustion chamber (3), secondary air channel 20 being installed.

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