CN2304070Y

CN2304070Y - Back-burning boiler

Info

Publication number: CN2304070Y
Application number: CN 97236545
Authority: CN
Inventors: 王和
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-09
Filing date: 1997-07-09
Publication date: 1999-01-13
Anticipated expiration: 2007-07-09

Abstract

The utility model relates to a back-burning boiler which is mainly composed of a boiler shell, a boiler furnace, a grate, etc. The utility model is characterized in that a row of cold water pipes with wing plates are arranged on the coal bed of a boiler chamber and below the coal bed, and the boiler chamber is divided into two parts which are not communicated; a cast iron single layer grate and a cold water pipe grate are respectively arranged in the two parts; a plurality of smoke leading pipes are arranged between the boiler shell on one side of the cold water pipe grate and the boiler furnace; high-temperature fireworks generated by the burning of the upper coal bed on the cast iron single layer grate is turned and passes through the coal bed on the cold water pipe grate under the action of chimney draught, the high-temperature fireworks is exhausted form the smoke leading pipe through secondary combustion. Great combustion condition is obtained, and the exhausted smoke gas is colorless and is in accordance with the environmental protection requirement.

Description

Back-burning boiler

The utility model is a kind of novel coal boiler.

Existing hand coal-fired boiler, for adopting flue gas usually, the purpose that reaches smoke abatement and dust control can only form the double-deck furnace grate furnace of anti-burning downwards, but in actual the use because the ignition condition of upper grate and all relatively poor to the coal adaptive capacity, make raw coal sintering and dry distillation speed on the upper grate too slow, the heat of supplying with burner hearth is not enough, under the situation of whole often coal seam last complete inflammation still, the user just is eager to disclose coal downwards, thereby the volatile matter of coal can not get abundant burning and just enters atmosphere, cause and disclose a dant and emit a burst of black smoke, the user who also has directly throws in raw coal combustion on lower floor's fire grate, to satisfy the needs of heat supply, so destroyed backfire, volume of smoke discharged out of the furnace, severe contamination environment.

The purpose of this utility model is a kind of novel coal-burning boiler of design, and this stove changes anti-burning for flashing back, and obtaining the combustion conditions of the best, and guarantees the complete compliance with environmental protection requirements of soot emissions.

The purpose of this utility model is achieved in that cold water pipe that the lower furnace portion at handwarmer vertically is provided with row's band wing plate is with the burner hearth coal seam and be divided into two not connected parts below the coal seam, (or the burner hearth that two tops communicate is set) is provided with a cast iron individual layer fire grate in the some therein, the cold water pipe fire grate is set in another part, between the furnace shell of cold water pipe fire grate one side and flue, be provided with many and draw smoke pipe, this lower end of drawing smoke pipe communicates below the cold water pipe fire grate, the upper end communicates with smoke box, so, only from cast iron individual layer fire grate bottom bubbling air, utilize chimney or air-introduced machine to make cold water pipe fire grate bottom form negative pressure, during burning, the flow process of flue gas is: the coal seam on the cast iron individual layer fire grate turns to the cold water pipe fire grate overhead and pass the coal seam that catches fire on the cold water pipe fire grate after the high temperature fire cigarette heat release that primary combustion forms again, this high temperature pyrotechnics makes the rapid ablaze while of the coal seam on the cold water pipe fire grate itself carry out second-time burning again, enter annular smoke box through drawing smoke pipe then, enter atmosphere from chimney, this flow process has just formed the process of flashing back, carbon combustible in the flue gas through flashing back fully burns, obtain the best combustion operating mode, again because of in the flue gas not the carbon containing material be colourless, complete compliance with environmental protection requirements.

Back-burning boiler that the utility model is carried is simple in structure, and is easy to operate, the complete compliance with environmental protection requirements of not only thermal efficiency height, and soot emissions.

Now in conjunction with the accompanying drawings Back-burning boiler that the utility model is carried is further described:

Fig. 1 is the schematic diagram of Back-burning boiler that the utility model is carried.

As can be seen from Figure 1, Back-burning boiler is mainly by furnace shell 1, outlet pipe 2, chimney 3, flue 5, furnace foundation 8, water inlet pipe 9, annular smoke box 12 compositions such as grade, the lower vertical of burner hearth 4 is provided with a row's band wing plate and the overlapping in twos cold water pipe 6 of adjacent vanes, the following position of burner hearth 4 underlying seams and coal seam is divided into two not connected part A and B, or in boiler, be arranged in parallel burner hearth that two tops communicate to form two part A and B, one cast iron individual layer fire grate 7 is set in a part of A therein, partly among the B cold water pipe fire grate 11 is set at another, between the furnace shell 1 of cold water pipe fire grate 11 1 sides and flue 5, be provided with many and draw smoke pipe 10, drawing smoke pipe 10 and lower end communicates with the lower space of cold water pipe fire grate 11, the upper end feeds in the annular smoke box 12, or a by-pass flue communicate with another heated body outside the furnace shell 1 (among the figure draw in the end) is set in the bottom of the furnace foundation 8 of cold water pipe fire grate 11 bottoms, so, only from cast iron individual layer fire grate 7 bottom bubbling airs, utilize the gravitation of chimney 3 or air-introduced machine (among the figure draw in the end), make cold water pipe fire grate 11 lower space form negative pressure, during burning, the primary combustion of the coal seam of cast iron individual layer fire grate 7 through making progress forms thermal-flame, pyrotechnics turns to the overhead of cold water pipe fire grate 11 again and passes the coal seam that catches fire on the cold water pipe fire grate 11 after the heat release, when this high temperature pyrotechnics burns the coal seam on the cold water pipe fire grate 11 rapidly, itself has carried out second-time burning again, flue gas after the second-time burning enters annular smoke box 12 through drawing smoke pipe 10, continue from chimney 3, to enter atmosphere after the heat release, perhaps the by-pass flue of the bottom of this flue gas through being arranged at furnace foundation 8 is guided to and is continued troubleshooting atmosphere after the heat release in another heated body outside the furnace shell 1, this combustion process is the process of flashing back, the carbon inflammable substance is fully burnt and have the best combustion operating mode, and carbon containing material and be colourless, compliance with environmental protection requirements not in the discharge flue gas.

Claims

1, Back-burning boiler of being made up of furnace shell 1, outlet pipe 2, annular smoke box 12, flue 5, furnace foundation 8, water inlet pipe 9, burner hearth 4 etc. is characterized in that:

The coal seam of a, burner hearth 4 and vertically be provided with the cold water pipe 6 of a row band wing plate below the coal seam is divided into not connected two part A and B with burner hearth 4 bottoms,

B, be provided with a cast iron individual layer fire grate 7 in partly at A,

C, be provided with one group of cold water pipe fire grate 11 in partly at B,

Be provided with between the furnace shell 1 of d, cold water pipe fire grate 11 1 sides and the flue 5 and draw smoke pipe 10.

2, according to the described Back-burning boiler of claim 1, it is characterized in that being arranged in parallel in the body of heater burner hearth that two tops communicate to form two partly A and B.

3, according to the described Back-burning boiler of claim 1, it is characterized in that the lower end of drawing smoke pipe 10 communicates with the lower space of cold water pipe fire grate 11, the upper end feeds in the annular smoke box 12.

4, Back-burning boiler according to claim 1 is characterized in that the lower space of furnace foundation 8 is provided with a by-pass flue, and this flue communicates with furnace shell 1 another heated body outward.