CN2235586Y

CN2235586Y - Secondary hot air water tube boiler

Info

Publication number: CN2235586Y
Application number: CN 95227680
Authority: CN
Inventors: 张高山
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-14
Filing date: 1995-12-14
Publication date: 1996-09-18
Anticipated expiration: 2005-12-14

Abstract

The utility model relates to a secondary hot air water tube boiler whose boiler shell is provided with an interlayer water wall. A plurality of hot water pipes are communicated with the interlayer water wall of the boiler body. A secondary air pipe preheated by the interlayer water wall is communicated with a flame burning area above a coal bed in a hearth, and the air outlets of the secondary air pipe are a plurality of small eyelets. The small eyelets are arranged in an arc line mode or a linear mode according to the hearth shape. The secondary hot air water tube boiler is favorable for accomplishing safely burning coal, improves heat efficiency, saves coal and energy, exhausts white smoke, reduces air pollution and protects environment.

Description

The secondary hot-air water-tube boiler

The utility model relates to coal-burning boiler, refers in particular to a kind of water-tube boiler that secondary hot-air is arranged.

Coal-fired hot-water boiler is widely used in industry and civilian, wherein water-tube boiler is with its simple structure, the thermal efficiency is higher and at heating, extensively adopt in the purposes such as hot water, boiling water supply, existing boiler is generally an air intake (air blast air-supply or gravity-flow ventilation), has incomplete combustion, the thermal efficiency is not fully used, discharging black smoke dust, contaminated air, drawbacks such as hostile environment.

The purpose of this utility model provides a kind of secondary hot-air water-tube boiler structure, and the district delivers secondary hot-air to the burning roaring flame, makes fired coal combustion complete, improves the thermal efficiency, stops the black smoke discharging, reaches purpose energy-conservation and the protection environment.

The purpose of this utility model is achieved through the following technical solutions, the utility model is a kind of secondary hot water's pipe boiler, mainly form by furnace shell, burner hearth, water pipe etc., furnace shell has the intermediate water wall, if be communicated with furnace sandwich water wall in horizontal water tube, secondary air channel leads to the flame combustion zone above the coal seam in the burner hearth after by the preheating of intermediate water wall.

The air-out aperture of described secondary air channel is some small perforations, and this small perforations becomes camber line or arranged in a straight line according to the burner hearth shape.

The utility model has following positive beneficial effect:

1. secondary hot-air pipe configuration of the present utility model is applicable to the various water-tube boiler of water wall interlayer, comprise vertical (referring to the upwards circulation of cigarette, flame) water-tube boiler, horizontal (referring to that cigarette, flame are to horizontal direction or the tortuous direction circulation of level) water-tube boiler, the light water pipe boiler, the counter-burning type water-tube boiler, cylindrical furnace boiler, square furnace boiler etc.Wide adaptability is promoted easily.

2. secondary hot-air is sent into the big vigorous district of flame combustion of flue gas concentration in the burner hearth, helps to realize coal-fired completing combustion, improve the thermal efficiency, economize on coal energy-conservation.

3. secondary hot-air more helps realizing completing combustion than secondary cold wind, can reach white cigarette discharging, reduces air pollution, the protection environment.

Now in conjunction with the accompanying drawings with preferred embodiment:

Fig. 1 is the embodiment that the utility model is used for vertical light water pipe boiler.

Fig. 2 is the 2-2 sectional plane of Fig. 1.

The same Fig. 1 of Fig. 3 is another embodiment.

Fig. 4 is the 4-4 section of Fig. 3.

Fig. 5 is the embodiment that the utility model is used for vertical counter-burning formula water-tube boiler.

Fig. 6 is the 6-6 section of Fig. 5.

Fig. 7 is the 7-7 section of Fig. 5.

Fig. 8 is the 8-8 section of Fig. 5.

Fig. 9 is the embodiment that the utility model is used for horizontal light water pipe boiler.

Figure 10 is the 10-10 section of Fig. 9.

Figure 11 is the embodiment that the utility model is used for horizontal counter-burning type water-tube boiler.

Figure 12 is the left side view of Figure 11.

Please refer to Fig. 1, Fig. 3, secondary hot-air water-tube boiler of the present utility model is mainly by furnace shell 1, burner hearth 2, horizontal water tube 3 compositions such as grade, water wall interlayer 4 is arranged around the furnace shell, constitute with parallel with it inner casing 6 by shell 5, described intermediate water wall is communicated with the water tank 7 of furnace roof, Fig. 1, Fig. 3 shows vertical ordinary hot water-tube boiler, its body of heater inner and upper has many water pipes 3 to be laterally connected in inner casing 6, its water pipe endoporus communicates with intermediate water wall 4, burner hearth 2 is positioned at the body of heater bottom, fire grate 8 is arranged in it, fire grate 8 tops and horizontal water tube 3 belows are combustion zone 9, there is coal filling hole 10 body of heater appropriate location above fire grate 8, and there is ash hole 11 the body of heater appropriate location below fire grate 8, and chimney 12 is arranged above furnace roof.

The air that plain cylindrical furnace is entered through ash hole by fire grate 8 belows (air blast air-supply or natural air inlet) is an air intake, secondary hot-air pipe 13 of the present utility model is introduced by the suitable position of body of heater and is entered intermediate water wall 4, flame combustion vigorous regional 15 in its air outlet pipe 14 entire body burner hearths, for the light water pipe boiler, flame combustion vigorous regional 15 is near above the coal seam, some small perforations 16 are arranged on the air outlet pipe 14 of secondary air channel, this small perforations is laid according to the burner hearth shape, Fig. 1 Fig. 2 is a kind of embodiment, discharge pipe 14 is a circular arc, around the inwall 6 of whole burner hearth 2, air-out eyelet 16 leads to inboard wall of burner hearth by tubule in intermediate water wall 4, becomes the air-supply of full circle ring-type.Fig. 3 Fig. 4 is used for another embodiment of vertical light water pipe boiler for the utility model, its secondary hot-air outlet 14 is a straight tube, make with refractory material, from intermediate water wall 4, lead to chafing dish vigorous regional 15 the center of burning, some small perforations 16 are arranged in the appropriate location of the side face of refractory material outlet 14.

Fig. 5 to Fig. 8 is the embodiment of vertical counter-burning formula water-tube boiler, do not exist together above its burner hearth 2 by the combustion chamber of forming by horizontal water tube 17 with vertical light water pipe boiler shown in Figure 1, the orientation of horizontal water tube 17 should be orthogonal with the orientation of horizontal water tube 3 herein, surround to have between the horizontal water tube 17 of arcuation and make its top sealing iron plate binding, following horizontal row water pipe 18 is provided with suitable fire grate at interval, on the body of heater of horizontal water tube 18 tops coal filling hole 21 is arranged, coal-fired at horizontal water tube 17,18 spaces that surrounded, 19 internal combustion, its cigarette, flame all walks downward, cigarette with burner hearth 2 internal combustion, flame together through horizontal water tube 17 and furnace wall 6 formed crescent moons by 20 in by upwards flowing to horizontal water tube 3, the vigorous district 15 of the flame combustion that this crescent moon passage is this stove, described secondary air channel 13 is introduced intermediate water wall 4 after two-way semicircular arc outlet 14 leads to combustion zone 15 with secondary hot-air, by some small perforations 16 secondary hot-air is sent into burner hearth and sees Fig. 8.

Fig. 9 Figure 10 is applied to the embodiment of horizontal light water pipe boiler for the utility model, this stove has some firebreaks 22 of intermediate water wall, the vigorous district of the flame combustion of this kind type of furnace is in the upwards constricted channel 23 of burner hearth 2, this zone cigarette flame concentration maximum, the outlet 14 of described secondary hot-air is a straight tube, has a row to have the tubule of small perforations 16 to pass inwall 6 on it and leads to outlet shrinking zone 23.

Figure 11, Figure 12 are applied to the embodiment of horizontal counter-burning type water-tube boiler for the utility model, this stove is a upper combustion chamber 19 by the space of being made up of horizontal water tube 18 and upper inner wall 6 above combustion chamber 2, the furnace wall is provided with upper coal feeding mouth 21, the vigorous district of the flame combustion of this kind furnace wall is in the outlet constricted channel 23 of burner hearth 2, described secondary air channel 13 leads to the below of this passage 23 near the exit after by 4 preheatings of water wall interlayer, air outlet pipe 14 is a straight tube, and some have the tubule of small perforations 16 to lead to passage 23.

The import of described secondary air channel 13 can be equipped with plate to regulate air quantity (not showing on the plate figure) during enforcement.

Because watertube boiler has many kinds, as described above, described secondary hot-air structure can be applicable to vertical, the horizontal boiler of water-tube boiler, common single furnace boiler, the anti-various type of furnaces such as twin-furnace boiler, cylinder body of heater boiler, square body of heater boiler of burning, and this specification does not exemplify one by one.

Claims

1. secondary hot-air water-tube boiler, mainly form by furnace shell, burner hearth, water pipe etc., it is characterized in that: furnace shell has the intermediate water wall, and some horizontal water tubes are communicated with furnace sandwich water wall, and secondary air channel leads to the flame combustion zone of top, coal seam in the burner hearth after by the preheating of intermediate water wall.

2. secondary hot-air water-tube boiler according to claim 1 is characterized in that: the air-out aperture of described secondary air channel is some small perforations, and this small perforations becomes camber line or arranged in a straight line according to the burner hearth shape.