CN201251276Y - Backfire coal-gas normal pressure hot-water boiler - Google Patents

Abstract

The utility model relates to a backfire coal-gas normal pressure hot-water boiler. A secondary combustion chamber, a backfire coal-gas combustion chamber served as a first combustion chamber and a convection heating arrangement space are arranged above the boiler-body grate of the backfire coal-gas normal pressure hot-water boiler in turn; the first combustion chamber is communicated with the convection heating arrangement space and is provided with an independent flue-gas pass-through channel; the independent flue-gas pass-through channel is provided with a control valve for starting or closing the channel. The technical proposal resolves the problems that the flue gas in the first combustion chamber often overflows from a boiler door to affect the working environment of a stoker; the flue-gas pass-through channel leads the flue gas in the first combustion chamber into the convection heating arrangement space to be mixed with the high-temperature flue gas in the secondary combustion chamber, so that the volatile combustible component is burnt out, thus releasing the thermal value, purifying the working environment of the stoker and improving the safe operating performance of the boiler.

Description

Reverse combustion type coal gas normal-pressure hot-water boiler

Technical field

The utility model relates to reverse combustion type coal gas normal-pressure hot-water boiler, relate in particular to the structural design that it dredges gas generation and combustion chamber flue gas.

Background technology

Existing reverse combustion type coal gas normal-pressure hot-water boiler, be provided with reverse combustion type coal gas primary zone in the space of its water jacket furnace, and the secondary combustion chamber between primary zone's fire grate and the body of heater fire grate, the water-evaporating furnace top furnace space of coal gas combustion chamber is that festoon is subjected to thermosphere, and primary zone and secondary combustion chamber are equipped with the air distribution passage.There is a technical problem underlying in existing reverse combustion type coal gas normal-pressure hot-water boiler product, especially in boiler banking state, the retrograde resistance of primary combustion flue gas is bigger, thereby have a great deal of flue gas and directly overflow body of heater by fire door gap, primary zone, because of the Main Ingredients and Appearance of primary combustion flue gas is a carbon monoxide, both polluted stoker's working environment, also increased the insecurity of boiler, the also release because the flammable matter of boiler is not thoroughly burnt in stove, the thermal efficiency can not get fully playing.

Summary of the invention

Goal of the invention of the present utility model is to provide a kind of can effectively control the reverse combustion type coal gas normal-pressure hot-water boiler of dredging primary combustion flue gas trend, improving the safe operation of the boiler performance.The reverse combustion type coal gas normal-pressure hot-water boiler technical scheme that the utility model provides, its major technique content is: a kind of reverse combustion type coal gas normal-pressure hot-water boiler, the upper space of water jacket furnace fire grate is provided with secondary combustion chamber successively, as the reverse combustion type coal gas combustion chamber of primary zone and the convection current arrangement space of being heated, secondary combustion chamber is between body of heater fire grate and the primary zone's fire grate, primary zone and the convection current arrangement space of being heated is connected through flue gas put-through channel independently, opens and closes this flue gas put-through channel and is provided with control gate.

The disclosed reverse combustion type coal gas of the utility model normal-pressure hot-water boiler technical scheme, setting by flue gas put-through channel and its control gate, can in the boiler banking, select its flue gas put-through channel of mediation, flue gas mediation with the indoor generation of primary combustion, guiding to convection current is heated in the arrangement space, the high-temperature flue gas up with secondary combustion chamber mixes, after-flame flammable matter wherein, fully discharge calorific value, improve the convection current arrangement space thermal conversion efficiency that is heated, avoided overflowing of primary zone's flue gas, purify, improve stoker's working environment, guaranteed the normal operation of boiler combustion and banking, operation control is more convenient, safety and reliable.

Description of drawings

Fig. 1 is the part sectional structure schematic diagram of this reverse combustion type coal gas normal-pressure hot-water boiler

Fig. 2 is that the A of Fig. 1 is to structural representation

Fig. 3 has the plan structure figure that part is analysed and observe for Fig. 1

Fig. 4 is the water cooling tube wall construction pie graph of primary zone.

The specific embodiment

Describe the structure structure of the utility model reverse combustion type coal gas normal-pressure hot-water boiler in detail in conjunction with above each concrete enforcement structure shown in the drawings.In this enforcement structure, this reverse combustion type coal gas normal-pressure hot-water boiler is vertical water jacket furnace, its water cooling tube body of heater fire grate makes progress and is provided with secondary combustion chamber 1 successively in the space, the reverse combustion type coal gas combustion chamber that water-cooling wall or water-cooled tube wall constitute, it is primary zone 2, with the convection current arrangement space 4 of being heated, secondary combustion chamber 1 is space between body of heater fire grate and the primary zone's fire grate, coal-fired drying in the primary zone 2 at red-hot coke layer, destructive distillation and reduction, separate out fuel gas such as its volatile matter and carbon monoxide, pass heat zone, oxidized at secondary combustion chamber 1, burning, enter the convection current arrangement space 4 of being heated with the strong combustion high temperature flue gas of secondary combustion chamber, in the present embodiment boiler construction, convection current is heated in the arrangement space 4 to be connected with furnace water jacket and is provided with horizontal festoon 5, high-temperature flue gas staggered these festoons that washes away in service, reach the technical purpose of abundant heat exchange, flue gas is finally discharged body of heater by top smoke discharge tube 6.Primary zone's 2 top locular walls are offered air port 3, be communicated to the outer independent air compartment 30 of body of heater by air port 3 pipelines, be communicated to the convection current arrangement space 4 of being heated by this air compartment 30 tops output mouth of pipe 32 and constitute the flue gas put-through channel jointly, the output mouth of pipe that opens and closes this flue gas put-through channel is provided with control gate 31.In the banking operation, open control gate by the handle that is arranged at control gate 31, get through the flue gas put-through channel, is that the convection current arrangement space 4 of being heated is dredged, caused to the flue gas of carbon monoxide by this flue gas put-through channel with the Main Ingredients and Appearances that produced in the primary zone 2, mix with secondary combustion chamber 1 up high-temperature flue gas, the flammable matter of after-flame volatile matter wherein, fully discharge calorific value, thereby improve its burning exothermal efficiency, also having blocked primary zone's flue gas overflows outside body of heater, improve stoker's environmental quality of working, also guarantee the working environment of boiler safety simultaneously.When boiler normally moved, sealing flue gas put-through channel control gate 31 guaranteed normally carrying out of boiler backfire gas generation and combustion.In the present embodiment structure, its primary zone is the water cooling tube wall construction, and its each water cooling tube 20 is provided with both sides fin 21, two adjacent two water cooling tube fin seal weldings and constitutes primary zone's water-cooled tube wall, has improved the sealing property of combustion chamber.

Claims (3)

1, a kind of reverse combustion type coal gas normal-pressure hot-water boiler, the upper space of water jacket furnace fire grate is provided with secondary combustion chamber (1) successively, as the reverse combustion type coal gas combustion chamber of primary zone (2) and the convection current arrangement space (4) of being heated, secondary combustion chamber is between body of heater fire grate and the primary zone's fire grate, it is characterized in that primary zone and the convection current arrangement space of being heated is connected through flue gas put-through channel independently, opens and closes this flue gas put-through channel and is provided with control gate (31).

2, reverse combustion type coal gas normal-pressure hot-water boiler according to claim 1, it is characterized in that top, primary zone locular wall offers air port (3), be communicated to the outer air compartment (30) of body of heater by air port (3) pipeline, be communicated to the convection current arrangement space (4) of being heated by the air compartment top output mouth of pipe (32) and constitute the flue gas put-through channel jointly, the output mouth of pipe that opens and closes this flue gas put-through channel is provided with control gate (31).

3, reverse combustion type coal gas normal-pressure hot-water boiler according to claim 1, it is characterized in that the primary zone is the water cooling tube wall construction, its each water cooling tube (20) is provided with both sides fin (21), and the fin seal welding of two adjacent water cooling tubes constitutes primary zone's water-cooled tube wall.

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