CN201628205U

CN201628205U - Vertical gas-fired boiler

Info

Publication number: CN201628205U
Application number: CN2010201223057U
Authority: CN
Inventors: 夏正; 夏毅
Original assignee: ZIGONG DONGLIAN BOILER CO Ltd
Current assignee: ZIGONG DONGLIAN BOILER CO Ltd
Priority date: 2010-03-03
Filing date: 2010-03-03
Publication date: 2010-11-10
Anticipated expiration: 2020-03-03

Abstract

The utility model discloses a vertical gas-fired boiler comprising a combustion chamber, a combustor, a boiler body, a horizontal flue, an upright column, a superheater, membrane water-cooled wall tubes arranged on the peripheral side walls in the boiler body, a container and a boiler barrel. The vertical gas-fired boiler is characterized in that a plurality of water-cooled wall tubes on the left and right side walls of the boiler body are respectively provided with nose arch tubes protruding towards the center; the lower arch tubes at the same side are provided with a plurality of refractory bricks; and refractory belts made of refractory material are arranged on the peripheral side walls of a hearth below and at the nose arch tubes. The utility model has the advantages that the temperature and heat intensity of the hearth can be ensured, the gas burn-off rate is improved, and the heat transfer efficiency of the heating surface of the hearth is also improved.

Description

Vertical gas fired-boiler

Technical field

The utility model relates to a kind of vertical gas fired-boiler, particularly makes the vertical gas fired-boiler of fuel with low-BTU gas.

Background technology

Use low-BTU gas to make the vertical boiler of fuel at present, comprise the combustion chamber, several burners, body of heater, horizontal flue, back-end ductwork, superheater, fin panel casing around being located in the body of heater on the sidewall, the collection case, drum etc., burner in the combustion chamber often is arranged in four jiaos, be tangential circular rotary combustion, burner hearth is the straight barrel type structure, because the calorific value of combustion gas hangs down you, in order to improve fire box temperature, on the fin panel casing around the whole burner hearth, all lay the wall with refractory lining, refracto that insulating refractory is made, to reduce the caloric receptivity of membrane wall, just can make the ignition temperature that whole fire box temperature is brought up to be needed, lay wall with refractory lining, refracto like this on water-cooling wall combustion temperature in hearth and burner hearth intensity are reduced, the furnace heating surface heat transfer efficiency is poor, and the heating surface of being arranged can not be fully used, the waste steel, the burn-off rate of fuel gas reduces.

The utility model content

The purpose of this utility model is the above-mentioned deficiency at prior art, and a kind of vertical gas fired-boiler is provided, and it can guarantee the furnace temperature and the calorific intensity of burner hearth, improves the burn-off rate of combustion gas, can improve the heat transfer efficiency of furnace heating surface again.

For achieving the above object, vertical gas fired-boiler of the present utility model, comprise combustion chamber, burner, body of heater, horizontal flue, column, superheater, be located at fin panel casing, collection case, drum on the interior sidewall all around of body of heater, the several water screen tubes that it is characterized in that left and right sidewall in the body of heater are equipped with the arch nose pipe that protrudes to the center, arch tube is provided with the refractory brick of several piece below the homonymy, arch nose pipe place and below burner hearth around be provided with the wall with refractory lining, refracto that constitutes by refractory material on the sidewall;

Arch nose pipe and the refractory brick on it form chimney arch in burner hearth, with the burner hearth separated into two parts, the bottom is that insulated combustion chamber and wall with refractory lining, refracto play the thermal insulation of burner hearth and the effect of thermal source reflection together, to improve the furnace temperature and the calorific intensity of burner hearth, the burn-off rate of combustion gas is improved; Top is radiation heat-absorbing chamber, no longer lay the wall with refractory lining, refracto that refractory material is formed on the fin panel casing of top, to improve the heat transfer efficiency of upper furnace heating surface, and arch nose pipe and refractory brick can carry out disturbance, dispersion to flue gas stream, avoid the strong rotation bias current of gas-flow, make the heating surface that is arranged in the top be heated evenly, avoid occurring booster;

As further improvement of the utility model, on the water screen tube of every arch nose pipe both sides, be installed with the sealing band steel, and be provided with refractory concrete in the sealing band steel outside; Do not burnt out with the protection furnace wall;

As further improvement of the utility model, the arch nose pipe of above-mentioned and arranged on left and right sides vertically is being crisscross arranged; To form S shape air-flow, can improve gas flow velocity, to adapt to the contour calorific value fuel gas of natural gas fire box temperature and calorific intensity are required lower operating mode;

As further improvement of the utility model, the arch nose pipe of above-mentioned and arranged on left and right sides is in vertical contour setting; Reducing the flow velocity of gas, to adapt to the operating mode that fuel gas with low heat value such as carbon black tail gas is had relatively high expectations to fire box temperature and calorific intensity;

As further improvement of the utility model, above-mentioned several piece refractory brick is on arch tube in the same way, the gap is provided with;

As further improvement of the utility model, above-mentioned several piece refractory brick goes to upper and lower two-layer on arch tube and by orthogonal direction setting, lower floor's refractory brick is arc arch brick, and upper strata refractory brick is trapezoidal brick;

In sum, the utility model can guarantee the furnace temperature and the calorific intensity of burner hearth, improves the burn-off rate of combustion gas, can improve the heat transfer efficiency of furnace heating surface again, simultaneously, by the arch nose pipe and the refractory brick of diverse location and shape are set, form different air-flows, applicable to the combustion gas of different calorific values.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is that the B of Fig. 2 is to view.

Fig. 4 is the partial structurtes schematic diagram of the utility model embodiment two.

Fig. 5 is the C-C cutaway view of Fig. 4.

Fig. 6 is the partial structurtes schematic diagram of the utility model embodiment three.

Fig. 7 is the E-E cutaway view of Fig. 6.

Fig. 8 is that the D of Fig. 7 is to view.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Embodiment one

By Fig. 1, Fig. 2 and shown in Figure 3, this vertical gas fired-boiler, comprise combustion chamber 1, the burner (not shown), body of heater 2, horizontal flue 3, column 4, superheater 5, fin panel casing 6 around being located in the body of heater 2 on the sidewall, collection case 7, drum 8 etc., wherein left in body of heater 2, the water screen tube at several intervals of right side wall is equipped with the arch nose pipe 9 that protrudes to the center, the arch nose pipe 9 of both sides vertically is being crisscross arranged, on arch tube below the homonymy, be arranged at intervals with several piece arch refractory brick 10 in the same way, the gap length that refractory brick is 10 can be according to the operating mode adjustment, arch nose pipe 9 places and below burner hearth around be provided with the wall with refractory lining, refracto 11 that constitutes by refractory material on the sidewall;

Arch nose pipe 9 and the refractory brick 10 on it form chimney arch in burner hearth, with the burner hearth separated into two parts, the bottom is an insulated combustion chamber, and it and wall with refractory lining, refracto 11 play the thermal insulation of burner hearth and the effect of thermal source reflection together, to improve the furnace temperature and the calorific intensity of burner hearth, the burn-off rate of combustion gas is improved; Top is radiation heat-absorbing chamber, no longer lay the wall with refractory lining, refracto that refractory material is formed on the top fin panel casing 6, to improve the heat transfer efficiency of upper furnace heating surface, and arch nose pipe 9 and refractory brick 10 can carry out disturbance, dispersion to flue gas stream, avoid the strong rotation bias current of gas-flow, make the heating surface that is arranged in the top be heated evenly, avoid occurring booster; The arch nose pipe 9 of both sides vertically is being crisscross arranged, and forms S shape air-flow, can improve gas flow velocity, to adapt to higher calorific value fuel gas (5000-7000 kilocalorie/cubic meter) such as natural gas to fire box temperature and the lower operating mode of calorific intensity requirement;

Embodiment two

By Fig. 4 and shown in Figure 5, the vertical gas fired-boiler of this embodiment and the difference of embodiment one are: the arch nose pipe 12 of left and right sidewall is in vertical contour setting in the body of heater 2, on the water screen tube 13 of every arch nose pipe 12 both sides, be installed with sealing band steel 14, and be provided with refractory concrete 15 in sealing band steel 14 outsides, do not burnt out with the protection furnace wall;

The adiabatic combustion effect of this structure is better than embodiment one, can reduce the flow velocity of gas, to adapt to the operating mode that fuel gas with low heat value (being lower than 1000 kilocalorie/cubic meters) such as carbon black tail gas are had relatively high expectations to fire box temperature and calorific intensity;

Embodiment three

By Fig. 6, Fig. 7 and shown in Figure 8, the vertical gas fired-boiler of this embodiment and the difference of embodiment one are: the arch nose pipe 16 of left and right sidewall is in vertical contour setting in the body of heater 2, several piece refractory brick goes to upper and lower two-layer on arch tube 16 and by orthogonal direction setting, lower floor's refractory brick 17 is arc arch brick, and upper strata refractory brick 18 is trapezoidal brick;

The gas flow rate of this structure is between embodiment one and embodiment two, applicable to other combustion gas such as blast furnace gas, coke-stove gas.

Claims

1. vertical gas fired-boiler, comprise combustion chamber, burner, body of heater, horizontal flue, column, superheater, be located at fin panel casing, collection case, drum on the interior sidewall all around of body of heater, the several water screen tubes that it is characterized in that left and right sidewall in the body of heater are equipped with the arch nose pipe that protrudes to the center, arch tube is provided with the refractory brick of several piece below the homonymy, arch nose pipe place and below burner hearth around be provided with the wall with refractory lining, refracto that constitutes by refractory material on the sidewall.

2. vertical gas fired-boiler as claimed in claim 1 is characterized in that being installed with the sealing band steel on the water screen tube of every arch nose pipe both sides, and is provided with refractory concrete in the sealing band steel outside.

3. vertical gas fired-boiler as claimed in claim 1 is characterized in that the arch nose pipe of described and arranged on left and right sides vertically is being crisscross arranged.

4. vertical gas fired-boiler as claimed in claim 1, the arch nose pipe that it is characterized in that described and arranged on left and right sides is in vertical contour setting.

5. as the arbitrary described vertical gas fired-boiler of claim 1 to 3, it is characterized in that described several piece refractory brick is in the same way, the gap is provided with on arch tube.

6. as the arbitrary described vertical gas fired-boiler of claim 1 to 3, it is characterized in that described several piece refractory brick goes to upper and lower two-layer and by orthogonal direction setting, lower floor's refractory brick is arc arch brick on arch tube, upper strata refractory brick is trapezoidal brick.