CN2542982Y

CN2542982Y - Flat-flame coal-fired boiler

Info

Publication number: CN2542982Y
Application number: CN 02220459
Authority: CN
Inventors: 谢荣勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-10
Filing date: 2002-05-10
Publication date: 2003-04-02
Anticipated expiration: 2012-05-10

Abstract

The utility model relates to a flat-flame coal-fired boiler. A furnace is divided into a combustion chamber and a heat exchange chamber, which are communicated on the bottom. The lower part of the combustion chamber is provided with a fire grate. The side wall is provided with a coal filling port and a furnace door. An air inlet is opened above a furnace body and connected with a fan by an air duct. A heat storage guide board is arranged below the fire grate to divert the high temperature flue-gas passing the fire grate to the side far from the heat exchange chamber. Because of the blast of the fan, the oxygen is sufficiently supplied, the coal burns more efficiently so that the use efficiency of the coal is improved and the combustible content in ash is less than 3 per cent. The gas burns fully in the high temperature flat-flame area, therefore, carbon particles and carbon monoxide in the gas decrease greatly and pollution declines.

Description

A kind of flat flame coal-burning boiler

Technical field

The claimed technical scheme of the utility model relates to a kind of vertical fire coal boiler technology field.

Background technology

The coal-burning boiler that be widely used in each enterprises and institutions' water supply of town and country at present, heats the particularly following coal-burning boiler of 1T/h mainly is the vertical fire coal boiler, its structure as shown in Figure 1, body of heater is the water leg of upright columnar inside and outside double-deck steel shell, sealed cavity between the inside and outside housing 1,2 is a storage chamber 3, the inner chamber of inner housing 1 is a burner hearth, there is the fire grate 5 that is connected with body of heater the burner hearth below, lower furnace portion is the combustion zone, top is heat exchange zone, have coal filling hole on the body of combustion zone, fire door 4 is housed on the coal filling hole; Heat exchange zone has the heat exchange water pipe 6 that communicates with storage chamber 3, and the top has with the chimney 7 that is located at the body of heater top and communicates; Fire grate 5 belows are air inlet, in the middle of the furnace foundation 15 of air inlet below dust stratification pond 16 are arranged.The boiler advantage of this structure is simple in structure, be convenient to manual operations, shortcoming is that burning is insufficient, particularly contain combustibles such as dark smoke that a large amount of thin carbon granules people see usually and carbon monoxide in the flue gas of discharging during bituminous coal, serious to air environmental pollution, contain a large amount of about 15-30% of flammable coal in the ash content of discharging, energy utilization rate is low, has wasted valuable coal resource.

Summary of the invention

Technical problem to be solved of the present utility model is that a kind of novel coal boiler little, that energy utilization rate is high that pollutes will be provided.

The utility model utilizes such technical scheme to solve technical problem, and the combustion zone and the heat exchange zone of burner hearth is separated into the chamber that two bottoms communicate, and the cavity of combustion zone is the combustion chamber, and the cavity of heat exchange zone is a heat-exchanging chamber; Fire grate is equipped with in the bottom of combustion chamber, and sidewall has coal filling hole, and fire door is housed on the coal filling hole, has air inlet on the body of heater of coal filling hole top, links to each other with blower fan by airduct; The heat exchange water pipe that communicates with the both sides storage chamber is arranged in the heat-exchanging chamber, and top communicates with the chimney that is located at the body of heater top.During work, since the air blast of blower fan, the oxygen supply abundance, the coal burning is comparatively abundant, makes the coal utilization rate improve greatly, and the combustible content in the ash content of discharge is less than 3%; Improved the calorific intensity of unit grate area simultaneously, can reach more than 20%, increased the heat capacity of boiler, and can regulate the size of wind supply quantity according to the variation of heating load.

In order further to improve the coal utilization rate, make coal combustion more fully thoroughly, the content of carbon granules and carbon monoxide in minimizing ash and the flue gas, below fire grate, be provided with the accumulation of heat deflector, will be through the high-temperature flue gas guiding high temperature flat flame district of fire grate, promptly away from a side of heat-exchanging chamber, because temperature reached more than 700 degree after the accumulation of heat deflector absorbed heat, make flue gas when accumulation of heat deflector bottom flows to the heat-exchanging chamber bottom in horizontal direction, form one section high temperature flat flame district, prolonged the time that flue gas passes through, make carbon granules and carbon monoxide further fully burning in ash and the flue gas, thereby carbon granules and carbon monoxide in the flue gas are reduced greatly in high temperature flat flame district; When high-temperature flue gas is flowed through the accumulation of heat deflector simultaneously,, be convenient to the sedimentation of ash content, can reduce smoke content in the flue gas because of the flow velocity that is obstructed descends.Use the utility model boiler in the flue gas that chimney is discharged smoke content less than 80mg/m ³

Description of drawings

Fig. 1 is a vertical fire coal boiler structure schematic diagram.

Fig. 2 is the utility model structural representation.

Fig. 3 is another example structure schematic diagram of the utility model.

Among the above-mentioned figure, 1: inner housing, 2: shell body, 3: storage chamber, 4: fire door, 5: fire grate, 6: heat exchange water pipe, 7: chimney, 8: airduct, 9: blower fan, 10: dividing plate, 11: combustion chamber, 12: heat-exchanging chamber, 13: accumulation of heat deflector, 14: flame observation panel, 15: furnace foundation, 16: dust stratification pond, 17: ashpit, 18: water pipe, 19: exhaust gases passes.

The specific embodiment

By shown in Figure 2, the utility model boiler furnace is made up of the inside and outside housing 1,2 of cylindrical shape, sealed cavity between the inside and outside housing is a storage chamber 3, the inner chamber of inner housing 1 is a burner hearth, the combustion zone of burner hearth and heat exchange zone are separated into the chamber that two bottoms communicate by the double-deck steel dividing plate 10 of hollow, the cavity of combustion zone is combustion chamber 11, and the cavity of heat exchange zone is a heat-exchanging chamber 12; Cavity between the double-layer clapboard 10 communicates with the storage chamber of body of heater 3.Fire grate 5 is housed in the combustion chamber 11, and the sidewall of fire grate 5 tops has coal filling hole, and fire door 4 is housed on the coal filling hole, has air inlet on the body of heater of coal filling hole top, links to each other with blower fan 9 by airduct 8; The heat exchange water pipe 6 that communicates with both sides storage chamber 3 is arranged in the heat-exchanging chamber 12, and top communicates with the chimney 7 that is located at the body of heater top.Be provided with accumulation of heat deflector 13 below fire grate 5, accumulation of heat deflector 13 is fixed on body of heater and the dividing plate 10, will lead through the high-temperature flue gas of fire grate away from heat-exchanging chamber one side, and flue gas flows to the heat-exchanging chamber bottom in horizontal direction in accumulation of heat deflector 13 bottoms.Because temperature reached more than 700 degree after the accumulation of heat deflector absorbed heat, help carbon granules and carbon monoxide further burning at high temperature in the flue gas, therefore flue gas can keep the condition of high temperature when accumulation of heat deflector bottom flows to the heat-exchanging chamber bottom in horizontal direction, form one section high temperature flat flame district, prolonged the time that flue gas passes through, flue gas is further fully burning in high temperature flat flame district, thereby carbon granules and carbon monoxide in the flue gas are reduced greatly; When high-temperature flue gas is flowed through the accumulation of heat deflector simultaneously, because of the flow velocity that is obstructed descends, be convenient to the sedimentation of ash content, smoke content is less than 80mg/m3 in the flue gas that chimney is discharged.For the ease of observing the flame in high temperature flat flame district, on the housing below the accumulation of heat deflector, have flame observation panel 14.On the furnace foundation 15 of burner hearth bottom dust stratification pond 16 is arranged, a side of furnace foundation 15 is provided with ashpit 17.

Another embodiment of the utility model as shown in Figure 3, body of heater comprises two parts, one is combustion furnace, another is a heat-exchanging furnace, in the steel cylindrical shape, shell body 1,2 form, in, sealed cavity between the shell body is a storage chamber 3, combustion furnace inner housing 1 inner chamber is combustion chamber 11, and heat-exchanging furnace inner housing 1 inner chamber is a heat-exchanging chamber 12, and fire grate 5 is housed in the combustion furnace, the top is provided with air inlet, link to each other with blower fan 9 by airduct 8, the sidewall of fire grate 5 tops has the coal filling hole that communicates with combustion chamber 11, and fire door 4 is housed on the coal filling hole, fire grate 5 belows are provided with accumulation of heat deflector 13, have flame observation panel 14 on the body of heater of accumulation of heat deflector 13 belows.Body of heater one side of accumulation of heat deflector below has exhaust gases passes 19 to communicate with heat-exchanging chamber 12 bottoms of heat-exchanging furnace.On the furnace foundation 15 of 11 bottoms, combustion chamber dust stratification pond 16 is arranged, a side of furnace foundation 15 is provided with ashpit 17.The heat exchange water pipe 6 that communicates with both sides storage chamber 3 is arranged in the heat-exchanging chamber 12, and top communicates with the chimney 7 that is located at the body of heater top.There is water pipe 18 to communicate between the storage chamber 3 of combustion furnace and heat-exchanging furnace.Present embodiment only needs to make former boiler into heat-exchanging furnace applicable to the transformation to existing vertical fire coal boiler, increases a combustion furnace again and gets final product.

Claims

1, a kind of flat flame coal-burning boiler, body of heater is made up of inside and outside housing [1,2], sealed cavity between the inside and outside housing is storage chamber [3], the inner chamber of inner housing [1] is a burner hearth, and body of heater one side has the coal filling hole that communicates with burner hearth, and fire door [4] is housed on the coal filling hole, there is the chimney [7] that communicates with burner hearth the body of heater top, it is characterized in that burner hearth is separated into two chambers that the bottom communicates, one is combustion chamber [11], and one is heat-exchanging chamber [12]; Coal filling hole communicates with combustion chamber [11], and chimney [7] communicates with heat-exchanging chamber [12]; Have the ventilating opening that communicates with the combustion chamber on the body of heater of top, combustion chamber [11] and also communicate with blower fan [9] by airduct [8], fire grate [5] is equipped with in the below, and combustion chamber [11] communicate with heat-exchanging chamber [12] by fire grate [5] below; The heat exchange water pipe [6] that communicates with storage chamber [3] is arranged in the heat-exchanging chamber [12], and top communicates with chimney [7].

2, boiler according to claim 1 is characterized in that combustion chamber [11] and the heat-exchanging chamber [12] in the burner hearth separated by double-layer clapboard [10], and the cavity between the double-layer clapboard [10] communicates with the storage chamber [3] of body of heater.

3, a kind of flat flame coal-burning boiler, it is characterized in that body of heater comprises combustion furnace and two parts of heat-exchanging furnace, each body of heater is by interior, shell body [1,2] form, in, sealed cavity between the shell body is storage chamber [3], combustion furnace inner housing [1] inner chamber is combustion chamber [11], heat-exchanging furnace inner housing [1] inner chamber is heat-exchanging chamber [12], fire grate [5] is housed in the combustion furnace, the top is provided with air inlet, communicate with blower fan [9] by airduct [8], the sidewall of fire grate top has the coal filling hole that communicates with the combustion chamber, and fire door [4] is housed on the coal filling hole, and body of heater one side of fire grate [5] below has exhaust gases passes [19] to communicate with heat-exchanging chamber [12] bottom of heat-exchanging furnace; The heat exchange water pipe [6] that communicates with storage chamber [3] is arranged in the heat-exchanging chamber [12], and top communicates with the chimney that is located at the body of heater top [7]; There is water pipe [18] to communicate between the storage chamber of combustion furnace and heat-exchanging furnace [3].

4,, it is characterized in that the below of fire grate [5] is provided with accumulation of heat deflector [13], the high temperature flat flame district of the heat-exchanging chamber [12] that will lead through the high-temperature flue gas of fire grate [5] according to claim 1 or 2 or 3 described boilers.

5, boiler according to claim 4 is characterized in that having flame observation panel [14] on the body of heater of accumulation of heat deflector [13] below.