CN2682333Y

CN2682333Y - Horizontal nonpressurized hot water boiler burning briquette

Info

Publication number: CN2682333Y
Application number: CN 200420030232
Authority: CN
Inventors: 刘传祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-20
Filing date: 2004-01-20
Publication date: 2005-03-02
Anticipated expiration: 2014-01-20

Abstract

The heating surface of the gas passage of the existing horizontal normal pressure hot water boiler burning briquette adopts a pipe bundle structure of smoke pipes, the structure has the problems of easy ash deposition and easy obstruction, the consequent flushing mode leads to slightly lower boiler thermal efficiency and bad water circulation, a plurality of existing hydropexis zones can cause partial 'subcooled boiling', the accidents of 'decrepitated pipe' and 'bulges burned' can appear, and the safety is poor. In order to solve the technical problems, the technical proposal of the utility model is that a longitudinally arranged pipe bundle of water pipes is arranged in the gas passage. The longitudinally arranged pipe bundle of the water pipes is in the heat exchange mode that air water transversely flushes, the heat exchange degree is greatly raised, the water circulation ability of the boiler is improved, the condition is created to reduce the water circulation dead angles of the boiler, the accumulation of gas ash can not influence the clearness of the gas passage, and long-term and normal combustion and heat exchange operation of the boiler can be guaranteed.

Description

Horizontal moulded coal normal-pressure hot-water boiler

Technical field

The utility model relates to a kind of improvement technology of horizontal moulded coal normal-pressure hot-water boiler.

Background technology

Existing horizontal molded coal boiler has two kinds of structure composition forms substantially: a kind of is that its boiler body is made of water screen tube and pyrotechnics pipe, refractory brick need be set build the furnace wall formation by laying bricks or stones; Another kind is to adopt dull and stereotyped stay bolt steel sheel folder water furnace wall to constitute its boiler body, and parts such as the interior chimney arch of body of heater need be built by laying bricks or stones equally.The pyrotechnics pipe of this boiler ubiquity convective region of two types is provided with structure, have a lot of technological deficiencies in actual motion: the heated surface arrangement structure of pyrotechnics pipe is very responsive to the flue gas dust stratification, cause dwindling of flue gas actual internal area, phenomenon can make boiler normally not move if " cigarette " appears in untimely cleaning, particularly remove the dust stratification duricrust matter-pole of pyrotechnics pipe high temperature port is difficult, along with the prolongation meeting of operating period is stopped up resistance because of this duricrust material, block and scrap, high-temperature flue gas is walked along inner-walls of duct in the pyrotechnics pipe in addition, forward wash away heating surface, its heat exchange effect obviously can be lower than the heat exchange effect that lateral cross is washed away tube bank, causes boiler thermal output on the low side; Secondly, its steel plate stay bolt furnace wall structure of latter's boiler can cause the potential faults that leaks in burner hearth, its reason is that the round steel stay bolt need pass inner furnace plate and the perforation of outer furnace wall plate, be formed by outside weldings, this kind stay bolt structure is high to the error requirements of wallboard punch position, and be inconvenient to weld, can't avoid the hidden danger of in stove, leaking again; Be once more the whole water circulation ability of existing molded coal boiler ubiquity poor, the hydropexis district arranged more, cause stove coolant-temperature gage area differentiation big, the thermal stress that produces is big, the fast heating surface slowly of water can produce part " subcooled boiling ", and " decrepitate pipe ", " burning bulge " accident appear, security performance is difficult as people's will; Moreover brick brickwork wall construction air leakage coefficient is big, and the loss of body of heater surface radiating is big, also causes boiler very heavy, also very easily damages in the transportation, and need long furnace drying time before operation.

The utility model content

For a change have the arrangement of the tube bank of being heated in horizontal normal pressure molded coal boiler heat convection district now, promote that boiler normally moves, improve heat exchange efficiency, the utility model provides the technical scheme of a whole set of horizontal moulded coal normal-pressure hot-water boiler, the major technique content of the technical program is: this horizontal moulded coal normal-pressure hot-water boiler, water jacket chimney arch set in its water jacket furnace is separated combustion chamber that constitutes the bottom and the exhaust gases passes that top is arranged at the heat convection between combustion chamber and the exhanst gas outlet with the body of heater inner space, exhaust gases passes is connected with the preheating zone of combustion chamber, is provided with the upper end and communicates with top body of heater water interlayer in this exhaust gases passes, the longitudinal water pipe tube bank that the lower end communicates with water jacket chimney arch water interlayer.

In above-mentioned overall technical architecture, the folder water furnace wall of its water jacket furnace has adopted following dull and stereotyped stay bolt structure: its stay bolt round steel vertical fixing is welded on the inner furnace plate, its folder water furnace wall of the fixing assembling of plug welding is adopted in perforation place that the flat-top boss that stay bolt round steel top is provided with places the outer furnace wall plate in perforation.

In technique scheme, the radiation of burner hearth heating surface that is positioned at the water jacket chimney arch fixedly is attached with the concretionary heat insulation sharp combustion of refractory concrete layer by the nail that grasps on its surface.

The horizontal moulded coal normal-pressure hot-water boiler that the utility model provides, the cancellation fire tube changes the heat exchange form of " forward washing away " heat exchange form for " transversal flow ", and it is mobile that this " transversal flow " structure also can force the high-temperature flue gas curve to be walked, prolonged its flue gas flow, its heat exchange effect improves greatly; The water pipe tube bank has substituted pyrotechnics pipe Pipe bundle structure, also obviously improved the boiler water cycle ability: this structure also utmost point is beneficial to the removing of flue gas dust stratification, and the accumulation of smoke dust is also very little to the occlusive effects of this fume passage, avoid the generation of " cigarette " phenomenon, guaranteed the long-term normal combustion heat exchange operation of boiler.Cooperate the water courage furnace wall stay bolt structure that adopts in the technical solutions of the utility model, because this structure does not have technological borehole on the inner furnace plate, also just fundamentally stopped pot water drainage in burner hearth, and this stay bolt process structure is holed by wallboard and stay bolt flat-top aligned position has bigger tolerance, has good welding anufacturability.This boiler has been cancelled the building wall structure, and the making of heat insulation sharp combustion layer need not specialty be built the worker by laying bricks or stones and can be finished, and this structure has low cost of manufacture and robust technological merit.In sum, horizontal moulded coal normal-pressure hot-water boiler of the present utility model has boiler trouble-free operation degree height, low cost of manufacture, security performance height, technological merit that the thermal efficiency is high.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of this horizontal moulded coal normal-pressure hot-water boiler internal structure

Fig. 2 is the A-A half section structural representation of Fig. 1

Fig. 3 is the I portion amplification assumption diagram of Fig. 1, and Fig. 4 is the shoot door sectional structure chart.

The specific embodiment

As shown in the figure, horizontal moulded coal normal-pressure hot-water boiler of the present utility model, being mainly water jacket furnace 1 constitutes, the space in the body of heater 1 is separated into the combustion chamber 2 of below by water jacket chimney arch 4, and provide the exhaust gases passes 3 of Convective Heat Transfer between combustion chamber 2 and the exhanst gas outlet for high-temperature flue gas, combustion chamber 2 is communicated with the preheating zone of exhaust gases passes 3 by combustion chamber 2, be furnished with corresponding heating surface in the exhaust gases passes 3, in the present embodiment, being provided with some upper ends in this exhaust gases passes 3 communicates with the water trapping layer of top water jacket furnace, the longitudinal water pipe tube bank 5 that the lower end communicates with water jacket chimney arch 4 water trapping layers, these longitudinal water pipe tube bank 5 flow directions along flue gas preferably constitute interspersed alternating expression arrangement architecture, can add big pipe on the one hand and restrain the probability of being heated and contacting with the direct heat transfer of high-temperature flue gas, the flue gas curve is flowed, by designing requirement prolong smoke flow process, improve heat exchange efficiency, the both sides body of heater is opened corresponding to exhaust gases passes 3 and is provided with some shoot doors 14, this shoot door 14 forms from top to bottom with its body of heater doorframe, and flare is not more than 15 ° angle, this structure is that the deadweight that utilizes the inclination shoot door to be produced is tightly fitted with its doorframe naturally, the door that just can save existing shoot door blocks parts, and it is fast that the hinged door structure has opening speed, the advantage that heat loss is little.The longitudinal water pipe is restrained 5 the circulation ability that has improved stove water that is provided with, in order further to strengthen the water circulation ability of stove water, eliminate the hydropexis dead band of body of heater, this boiler is provided with top water return outlet and supply water injector device thereof, in the water trapping layer at body of heater top, be provided with communicate with water return outlet 70 backwater jet state deep layer is introduced supply water injector pipe 71 in the body of heater, this supply water injector pipe 71 is introduced backwater in the body of heater water trapping layer of both sides, be provided with the backwater guide channel 73 that backwater is directly imported the body of heater bottom that upper port and supply water injector pipe 71 are oppositely arranged in the water trapping layer of its both sides body of heater from top to bottom, this structure can all stir stove water get up, thereby eliminated the existence of boiler " slough " comprehensively, make stove water " circulating ratio " reach 3-5 doubly, the existing molded coal boiler of heating surface stove water flow velocity improves 3-5 doubly, has avoided the bad serious consequence of " subcooled boiling " and water circulation.And in the present embodiment, its fire grate slideway is the plate rail 15 that vertically is provided with, the below of plate rail 15 is supported by the crossbeam 16 that two ends fixedly are welded on the furnace wall plate, plate rail 15 1 ends fixedly are welded on the body of heater front wallboard, plate rail 15 places on the position of crossbeam 16 location of being realized plate rail 15 and crossbeam 16 by the briquetting of both sides and its matched in clearance, this structure had both been avoided the water circulation dead band of water-cooled grate and the hidden danger of leaking, its gap detent mechanism makes plate rail that the space of freely expanding with heat and contract with cold can be arranged, and has realized the purpose of fault-free maintenance.The terminal extension of the burning-out zone of this molded coal boiler is provided with the cover 8 of slagging tap of realizing that wet method is slagged tap, and extended in by the fire grate slideway and forms the landslides 82 that cinder imported the pond 81 of cover 8 bottoms of slagging tap in the cover 8 of slagging tap, and this wet method is slagged tap and avoided slagging tap the flying dust pollution.

In an embodiment, adopt dull and stereotyped stay bolt structure as shown in Figure 2 between the curb pins water stove plate of its folder water body of heater, its stay bolt round steel 6 vertical fixing are welded on the inner furnace plate 10, the flat-top boss 61 that stay bolt round steel 6 tops are provided with is relative with the perforation of outer furnace wall plate 11, and implements the fixing assembling of plug welding at perforation 12 places.The outer surface of this folder water body of heater is provided with the heat-insulation layer 13 that is made of insulation material, the radiation of burner hearth heating surface of its water jacket chimney arch fixedly is attached with the concretionary heat insulation sharp combustion layer 9 of refractory concrete by the nail that grasps on its surface, owing to need not to be provided with heat-insulation layer and its inner refractory insulating layer of boiler with masonry construction, and being provided with of this heat-insulation layer 13 and heat insulation sharp combustion layer realized not having the technical purpose of leaking out, have maintenance, also need not the baker process simultaneously before the boiler use.

Claims

1, a kind of horizontal moulded coal normal-pressure hot-water boiler, water jacket chimney arch (4) set in its water jacket furnace (1) is separated combustion chamber (2) that constitutes the bottom and the exhaust gases passes (3) that top is arranged at the heat convection between combustion chamber and the exhanst gas outlet with the body of heater inner space, exhaust gases passes is connected with the preheating zone of combustion chamber, it is characterized in that being provided with in this exhaust gases passes the longitudinal water pipe tube bank (5) that the upper end communicates with top body of heater water interlayer, the lower end communicates with water jacket chimney arch water interlayer.

2, normal-pressure hot-water boiler according to claim 1 is characterized in that longitudinal water pipe tube bank (5) forms the staggered arrangement architecture that interts along the flow direction of flue gas.

3, normal-pressure hot-water boiler according to claim 1 is characterized in that body of heater is opened corresponding to exhaust gases passes (3) to be provided with some shoot doors (14), and this shoot door (14) forms from top to bottom with its body of heater doorframe that flare is not more than 15 ° angle.

4, normal-pressure hot-water boiler according to claim 1, it is characterized in that boiler is provided with top water return outlet and supply water injector device thereof, be provided with in the body of heater water trapping layer of top communicate with water return outlet (70) backwater is introduced supply water injector pipe (71) in the body of heater water trapping layer of both sides, be provided with the backwater guide channel (73) that backwater is directly imported the body of heater bottom that upper port and supply water injector pipe (71) are oppositely arranged in the water trapping layer of its both sides body of heater from top to bottom.

5, normal-pressure hot-water boiler according to claim 1, it is characterized in that terminal extension of burning-out zone is provided with the wet method tapping mechanism, this mechanism includes body of heater and extends the cover (8) of slagging tap that is provided with, and extends in the cover (8) of slagging tap and the downward-sloping landslide (82) of cinder being poured into the pond (81) of cover (8) bottom of slagging tap that forms by the fire grate slideway.

6, normal-pressure hot-water boiler according to claim 1, the dull and stereotyped stay bolt structure that it is characterized in that the folder water furnace wall of water jacket furnace is: its stay bolt round steel vertical fixing is welded on the inner furnace plate (10), perforation place that the flat-top boss (61) that stay bolt round steel (6) top is provided with places outer furnace wall plate (11) is by the fixing assembling of plug welding.

7, normal-pressure hot-water boiler according to claim 1 is characterized in that fixedly being attached with the concretionary heat insulation sharp combustion of refractory concrete layer (9) at the radiation of burner hearth heating surface of water jacket chimney arch (4) by the nail that grasps on its surface.

8, normal-pressure hot-water boiler according to claim 1, it is characterized in that the fire grate slideway is for vertically being provided with plate rail (15), the below of plate rail (15) is supported by the crossbeam (16) that two ends fixedly are welded on the furnace wall plate, the fixing welding of plate rail (15) one ends and body of heater front wallboard, plate rail (15) are positioned on the position of crossbeam (16) is located by the briquetting of both sides and its matched in clearance.