CN2342234Y

CN2342234Y - Boiler for producing steam and hot water

Info

Publication number: CN2342234Y
Application number: CN 98225376
Authority: CN
Inventors: 张明月
Original assignee: SHANGNENG ENERGY-SAVING TECHNOLOGY DEVELOPMENT Co SHANGHAI
Current assignee: SHANGNENG ENERGY-SAVING TECHNOLOGY DEVELOPMENT Co SHANGHAI
Priority date: 1998-10-16
Filing date: 1998-10-16
Publication date: 1999-10-06
Anticipated expiration: 2008-10-16

Abstract

The utility model relates to a boiler for producing steam and hot water. The boiler is provided with a boiler canister, and a combustion chamber and a steam-water heat exchanger are arranged in the boiler canister. A main steam valve, a safety valve, a discharging mouth, an inlet water valve, a water level gauge, an upper smoke box and a lower smoke box are arranged on the boiler canister. The periphery of the combustion chamber is provided with a plurality of heat-conducting pipes which are composed of outer pipes, inner pipes and needle fins. The lower side and both sides of the steam-water heat exchanger are provided with flow-division partition boards. When the utility model is in service, heat smoke steam generated by fuel combustions discharges the heat by way of the wall surface of the combustion chamber, the outer pipes, the inner pipes and the needle fins of the heat-conducting pipes, making the water in the boiler canister warm and vaporize to become the steam. The steam can be exported from the main steam valve and can discharge the heat toward the steam-water heat exchanger, making the exchanger export the hot water. The utility model has the advantages of high thermal efficiency and small volume.

Description

A kind of steam, hot water joint production boiler

The utility model relates to a kind of steam, hot water joint production boiler, particularly places vertical steam, the hot water joint production boiler of the drum vapor space with steam-water heat exchanger.

Vertical steam, the hot water joint production boiler of amount steam-water heat exchanger are provided with a combustion chamber in the drum bottom mostly in existing, are furnished with some heat-transfer pipes on it and make heating surface, and the superiors then are vapour, hydrospace, and steam-water heat exchanger is housed in the vapor space.The hot flue gas that fuel combustion produces, wall by the combustion chamber and heat-transfer pipe heating surface are passed to water in the drum to heat, and the water vaporization of being heated forms steam.Steam both can be to steam-water heat exchanger condensation heat release, made the cold water that enters from its water intaking valve be heated the back and exported from outlet valve; Can export from stop valve again.The weak point of this type of boiler is: one, place the heat-transfer effect of steam-water heat exchanger of the vapor space poor, trace it to its cause, be that heat exchanger can not be arranged very highly from the disengagement surface on the one hand, its underpart heating surface often contacts with boiling water heat transfer coefficient is greatly reduced; Be the steam that rises on the other hand with before the heat exchanger heating surface contacts, the condensed water of emitting heat with it earlier and falling contacts, cause heat output to reduce, the hot water amount that can supply also reduces, if will increase the hot water supply, then essential some heating surfaces that increase are so cause the increase of metal consumption and the increase of appearance and size; Two, heat-transfer pipe adopts light pipe as convection heating surface mostly, and its heat-transfer effect is poor, and heat loss due to exhaust gas is big, and heating surface area is little relatively, and required heat-transfer pipe quantity increases, and the volume of boiler also increases thereupon.

The purpose of this utility model provides a kind of steam, hot water joint production boiler, and it can make steam-water heat exchanger not contact with boiling water, is subjected to again than effectively the washing away of dry steam, fully heat exchange; Simultaneously, it has, and heat-transfer effect is good, heat loss due to exhaust gas is little, volume is little, and particularly height can greatly reduce.

For achieving the above object, the utility model has a drum, one combustion chamber is arranged at the bottom in drum, the vapor space on top has a steam-water heat exchanger, on drum, be provided with lower smoke box, upper smoke box and scavenge port, lower smoke box communicates with the combustion chamber, upper smoke box communicates with chimney, on drum, load onto stop valve respectively, safety valve, water intaking valve and water gage, it is characterized in that: in the combustion chamber peripheral disposition some heat-transfer pipes, heat-transfer pipe is made of outer tube and interior pipe, and an end of outer tube communicates with lower smoke box, and the other end communicates with upper smoke box, the water inlet of interior pipe and delivery port all with drum in the hydrospace communicate, with both sides one split-flow baffles is housed below the pipe of steam-water heat exchanger, the one end slightly tilts, and returns to the hydrospace so that stockpile at last water.During operation, the hot flue gas that fuel combustion produces, the wall through the combustion chamber is emitted partly and is entered lower smoke box behind the heat, continues to emit heat by the outer tube of heat-transfer pipe, interior pipe, after upper smoke box discharge from chimney.Water in the drum heats up, vaporization forms steam behind the outer tube and the heat absorption of interior pipe of the wall of combustion chamber, heat-transfer pipe.Steam both can make the cold water that enters from water intaking valve be heated the back from outlet valve output to steam-water heat exchanger condensation heat release, can export from stop valve again.

Above-mentioned heat-transfer pipe is welded with many cylindrical needle wings on the outer wall of pipe within it, to increase endotherm area, reduces heat loss due to exhaust gas, improves the thermal efficiency.

The utility model is because heat-transfer pipe is distributed in the periphery of combustion chamber, and is welded with many pin wings on the outer wall of the interior pipe of heat-transfer pipe, and endotherm area is greatly increased, and heat loss due to exhaust gas reduces, so the volume of boiler particularly highly can greatly reduce; Again owing to adopted split-flow baffles, both can avoid steam-water heat exchanger to contact with boiling water, the condensed water of having avoided again having discharged steam latent heat on the steam that rises and the steam-water heat exchanger and having fallen contacts, make steam-water heat exchanger be subjected to having improved the heat exchange effect than effectively the washing away of dry steam; Simultaneously, the position of steam-water heat exchanger also can be arranged lowlyer relatively, to reduce the height of boiler.

Provide embodiment of the present utility model and accompanying drawing below, and be described further in conjunction with the accompanying drawings:

Fig. 1, be positive view of the present utility model;

Fig. 2, be vertical view cutaway drawing of the present utility model;

Fig. 3, be local positive view of the present utility model;

Fig. 4, be side partial cross-sectional of the present utility model;

Fig. 5, be the partial sectional view of smoke pipe of the present utility model.

By shown in Figure 1, drum 1 is made of inside and outside layer, and insulation material is housed in the middle of it.Combuster 2 in drum 1, and fuel burns therein and forms hot flue gas.On drum 1, be provided with upper smoke box 6, lower smoke box 3 and scavenge port 18, and stop valve 10, safety valve 21, water intaking valve 8 and water gage 22 are housed.In the combustion chamber 2 peripheral disposition some heat-transfer pipes 4, heat-transfer pipe 4 is made up of outer tube 23, interior pipe 5 and pin wing 19, outer tube 23 1 ends communicate with lower smoke box 3, the other end communicates with upper smoke box 6, in pipe 5 water inlet 20 and delivery port 9 all communicate with the interior hydrospace of drum 1, water in the drum 1 relies on the effect of gravitational difference to form Natural Circulation in being heated, pipe 5 in promptly water constantly flows through from bottom to top; Simultaneously, also the outer wall of 2 outer wall and outer tube 23 constantly upwards flows along the combustion chamber.The vapor space on drum 1 top is equipped with steam-water heat exchanger 11, with both sides split-flow baffles 14 is housed below its pipe, and the end that split-flow baffles 14 rests on the support 15 is slightly downward-sloping, returns to the hydrospace so that stockpile at last water by water conservancy diversion plate washer 16.One door closure 17 and chimney 7 are housed on upper smoke box 6, and opening door closure 17 can purge or wash heat-transfer pipe 4, and its dirt can be discharged from scavenge port 18.During operation, the fuel hot flue gases that 2 burnings produce in the combustion chamber, 2 wall emits that the part heat is laggard goes into lower smoke box 3 through the combustion chamber, outer tube 23, interior pipe 5 and pin wing 19 by heat-transfer pipe 4 continue to emit heat, after upper smoke box 6, chimney 7 discharge.Water in the drum 1 is after the heating surface heat absorption, and formation steam heats up, vaporizes.Steam both can make the cold water that enters from water intaking valve 12 be heated the back from outlet valve 13 outputs to steam-water heat exchanger 11 condensation heat releases, also can be from stop valve 10 outputs.

By shown in Figure 2, around peripheral evenly distributed some heat-transfer pipes 4 of combustion chamber 2.

Press Fig. 3, shown in Figure 4, below the pipe 24 of steam-water heat exchanger 11, one split-flow baffles 14 is housed, contact to avoid pipe 24 to contact the condensed water that discharges steam latent heat and fall with pipe 24 with the steam of boiling water and rising with both sides.One end of split-flow baffles 14 is welded on the steam-water heat exchanger 11, and the other end rests on the support 16, and its end near support 15 is slightly downward-sloping, so that the condensed water that accumulates in returns to the hydrospace by water conservancy diversion plate washer 16.One convex shoulder 25 is arranged on support 15, and convex shoulder 25 passes split-flow baffles 14 and holds pipe 24.Support 16 is welded on the drum 1.

By shown in Figure 5, be welded with columned pin wing 19 on interior pipe 5 outer walls of heat-transfer pipe 4.

Claims

1, a kind of steam, the hot water joint production boiler, it has a drum, one combustion chamber is arranged at the bottom in drum, the vapor space on top has a steam-water heat exchanger, on drum, be provided with lower smoke box, upper smoke box and scavenge port, lower smoke box communicates with the combustion chamber, upper smoke box communicates with chimney, stop valve is housed respectively on drum, safety valve, water intaking valve and water gage, it is characterized in that: the combustion chamber peripheral disposition some heat-transfer pipes, heat-transfer pipe is made of outer tube and interior pipe, one end of outer tube communicates with lower smoke box, and the other end communicates with upper smoke box, the water inlet of interior pipe and delivery port all with drum in the hydrospace communicate, with both sides one split-flow baffles is housed below the pipe of steam-water heat exchanger, the one end slightly tilts.

2, according to the described steam of claim 1, hot water joint production boiler, it is characterized in that: on the outer wall of inner tube of heat-transfer pipe, be welded with many cylindric pin wings.

3, according to claim 1,2 described steam, hot water joint production boiler, it is characterized in that: on upper smoke box, have a door closure.