CN210861038U

CN210861038U - Double-boiler-barrel reciprocating boiler double-hearth structure

Info

Publication number: CN210861038U
Application number: CN201921835278.5U
Authority: CN
Inventors: 郭强; 李华
Original assignee: Liaoning Lvyuan Energy Environmental Protection Technology Group Co ltd
Current assignee: Liaoning Lvyuan Energy Environmental Protection Technology Group Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-06-26
Anticipated expiration: 2029-10-29

Abstract

The utility model provides a two boiler barrel reciprocating boiler double-furnace structure, includes main furnace, vice furnace, afterbody flue, economizer and air heater, vice furnace sets up between main furnace and afterbody flue, and communicates each other between vice furnace and the main furnace, and economizer and air heater all install in the afterbody flue, and raw water passes through the economizer and enters into the water circulating system in the boiler, and air heater is used for sending into the furnace of boiler after external air is heated to it, the utility model discloses optimize reciprocating boiler's structural design, through scientific and reasonable structural design, make the flue gas be "U" shape flow in vice furnace, prolong the dwell time of flue gas in the stove, fully recycle main furnace's flue gas waste heat, can increase convection bank vertically with the area of contact of hot flue gas stream, effectively improved convection bank's radiation heat absorption, when reducing exhaust gas temperature, the thermal efficiency of the boiler is scientifically and reasonably improved, and the safe and stable operation of the boiler is guaranteed.

Description

Double-boiler-barrel reciprocating boiler double-hearth structure

Technical Field

The utility model belongs to the technical field of the boiler, specifically a two boiler barrel reciprocating boiler double furnace structures.

Background

The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy.

The boiler is a water container heated on fire, a furnace is a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator.

The existing boiler generally adopts a single-hearth design, the radiation area in the boiler is relatively small, the heat utilization rate of the boiler is low, the heating time is long, and the safe and stable operation of the boiler cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a two furnace structures of two boiler drum reciprocating boiler.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a two boiler barrel reciprocating boiler double-furnace structure, includes main furnace, auxiliary furnace, afterbody flue, economizer and air heater, auxiliary furnace sets up between main furnace and afterbody flue, and communicates each other between auxiliary furnace and the main furnace, economizer and air heater all install in the afterbody flue, and the raw water process in the economizer enters into the water circulating system in the boiler, air heater is used for sending into the furnace of boiler with the outside air after its heating in, auxiliary furnace's upper portion and lower part correspond and are equipped with boiler barrel and lower boiler barrel, and connect between the upper and lower boiler barrel and set up to having the stream tube bank.

Preferably, the economizer and the air preheater are vertically distributed and are fixedly connected with the inner wall of the tail flue through screws.

Preferably, the water circulation system comprises a row of water wall cooling pipes arranged on two sides of the inner wall of the main hearth respectively, the upper ends of the water wall cooling pipes are directly communicated with the upper boiler barrel, and the lower ends of the water wall cooling pipes are supplied with water by the lower boiler barrel through the lower header.

Preferably, the convection bank is provided with four groups, and the two ends of the convection bank are respectively fixed with the upper and lower drums in a welding manner.

Preferably, a fixing piece is arranged at a position between the upper and lower drums in the auxiliary hearth, and the fixing piece is built at a position between the two adjacent convection tube bundles and is attached to the outer tube wall of the convection tube bundle.

Preferably, the top end of the auxiliary hearth is provided with a threaded groove, the upper drum is spirally arranged in the threaded groove, and the upper drum and the lower drum are both hollow cylindrical structures.

The utility model relates to a two furnace structures of two drum reciprocating boiler compares with prior art, has following beneficial effect:

(1) the upper part and the lower part of the auxiliary hearth are correspondingly provided with an upper boiler barrel and a lower boiler barrel, a convection tube bundle is connected between the upper boiler barrel and the lower boiler barrel, and through scientific and reasonable structural design, the flue gas flows in a U shape in the auxiliary hearth, so that the retention time of the flue gas in the furnace is prolonged, and the flue gas waste heat of the main hearth is fully recycled;

(2) raw water enters a water circulation system of the boiler after passing through the coal economizer, and the application of the double-hearth structure technology shortens the heating time, keeps the environment in the boiler uniform and can prolong the service life of the boiler;

(3) air enters the hearth after being heated by the air preheater, and the combustion temperature of the hearth is guaranteed, and meanwhile, the advantages of the double-hearth structure technology are combined, so that the exhaust gas temperature is effectively reduced compared with that of a single-hearth reciprocating boiler, and the thermal efficiency of the boiler is improved;

(4) set up the last drum of spiral installation, through rotatory last drum, can change the interval between last drum and the lower drum, make simultaneously to convection bank be the heliciform and distribute on the mounting surface, increase convection bank is vertical with the area of contact of hot flue gas stream, has effectively improved convection bank's radiation heat absorption volume, when reducing exhaust gas temperature, scientific and reasonable's the thermal efficiency of improvement boiler, guarantee boiler safety and stability operation.

Drawings

FIG. 1 is a schematic view of the overall structure of a double-hearth structure of a double-drum reciprocating boiler of the present invention;

FIG. 2 is an enlarged view of a partial structure A in FIG. 1 of a double-hearth structure of a double-drum reciprocating boiler of the present invention;

fig. 3 is an enlarged view of a partial structure B in fig. 1 of a double-hearth structure of a double-drum reciprocating boiler of the present invention.

Reference numerals: 1. a main hearth; 2. a secondary hearth; 3. putting the boiler barrel on the boiler; 4. discharging the boiler barrel; 5. a coal economizer; 6. an air preheater; 7. a convection bank; 8. a thread groove; 9. and a fixing member.

Detailed Description

The following description will further describe a specific embodiment of a double-hearth structure of a double-drum reciprocating boiler according to the present invention with reference to fig. 1. The utility model relates to a two boiler reciprocating boiler double furnace structures are not limited to the description of following embodiment.

Example 1:

the embodiment provides a concrete structure of a double-boiler-barrel reciprocating boiler double-hearth structure, as shown in fig. 1-3, the double-boiler-barrel reciprocating boiler double-hearth structure comprises a main hearth 1, an auxiliary hearth 2, a tail flue, an economizer 5 and an air preheater 6, wherein the auxiliary hearth 2 is arranged between the main hearth 1 and the tail flue, the auxiliary hearth 2 is communicated with the main hearth 1, the economizer 5 and the air preheater 6 are both arranged in the tail flue, raw water enters a water circulation system in a boiler through the economizer 5, the air preheater 6 is used for heating the external air and then sending the heated external air into a hearth of the boiler, an upper boiler barrel 3 and a lower boiler barrel 4 are correspondingly arranged on the upper portion and the lower portion of the auxiliary hearth 2, and an opposite flow tube bundle 7 is arranged between the upper boiler barrel and the lower boiler barrel.

As shown in fig. 1, the economizer 5 and the air preheater 6 are distributed up and down and are fixedly connected with the inner wall of the tail flue through screws.

Raw water enters a water circulation system of the boiler after passing through the coal economizer 5, and the application of the double-hearth structure technology shortens the heating time, keeps the environment in the boiler uniform and can prolong the service life of the boiler; air enters the hearth after being heated by the air preheater 6, the combustion temperature of the hearth is guaranteed, and meanwhile, the advantages of the double-hearth structure technology are combined, so that the exhaust gas temperature is effectively reduced compared with that of a single-hearth reciprocating boiler, and the thermal efficiency of the boiler is improved.

As shown in figure 1, the water circulation system comprises a row of water wall tubes arranged on two sides of the inner wall of the main hearth 1, the upper ends of the water wall tubes are directly communicated with the upper boiler barrel 3, and the lower ends of the water wall tubes are supplied with water from the lower boiler barrel 4 through a lower header.

As shown in fig. 1, four sets of convection bank 7 are provided, and both ends of convection bank 7 are respectively welded and fixed with the upper and lower drums.

By adopting the technical scheme, the upper part and the lower part of the auxiliary hearth 2 are correspondingly provided with the upper boiler barrel 3 and the lower boiler barrel 4, the convection tube bundle 7 is connected and arranged between the upper boiler barrel and the lower boiler barrel, and the flue gas flows in the auxiliary hearth 2 in a U shape through scientific and reasonable structural design, so that the retention time of the flue gas in the furnace is prolonged, and the flue gas waste heat of the main hearth is fully recycled.

As shown in fig. 1 and 3, a fixing piece 9 is arranged at a position between the upper and lower drums in the auxiliary hearth 2, and the fixing piece 9 is built at a position between two adjacent convection banks 7 and is attached to the outer pipe wall of the convection bank 7.

Example 2:

based on the embodiment 1, as shown in fig. 2, the top end of the auxiliary hearth 2 is provided with a threaded groove 8, the upper drum 3 is spirally arranged in the threaded groove 8, and both the upper drum 3 and the lower drum 4 are hollow cylindrical structures.

Through adopting above-mentioned technical scheme, set up spiral installation's last barrel 3, through rotatory last barrel 3, can change the interval between last barrel 3 and the lower barrel 4, make convection bank 7 be the heliciform simultaneously and distribute on mounting 9 surfaces, increase convection bank 7 on vertical with the area of contact of hot flue gas stream, effectively improved convection bank's radiation endotherm, when reducing the temperature of discharging fume, scientific and reasonable's the thermal efficiency of improvement boiler, guarantee boiler safe and steady operation.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a two boiler barrel reciprocating boiler double-furnace structure, includes main furnace (1), vice furnace (2), afterbody flue, economizer (5) and air heater (6), its characterized in that: the auxiliary furnace hearth (2) is arranged between the main furnace hearth (1) and the tail flue, the auxiliary furnace hearth (2) and the main furnace hearth (1) are communicated with each other, the coal economizer (5) and the air preheater (6) are installed in the tail flue, raw water passes through the coal economizer (5) into a water circulation system in the boiler, the air preheater (6) is used for feeding outside air into the furnace hearth of the boiler after the outside air is heated, the upper portion and the lower portion of the auxiliary furnace hearth (2) are correspondingly provided with the upper boiler barrel (3) and the lower boiler barrel (4), and a convection tube bundle (7) is connected and arranged between the upper boiler barrel and the lower boiler barrel.

2. The double-hearth structure of the double-drum reciprocating boiler as claimed in claim 1, wherein: the economizer (5) and the air preheater (6) are distributed up and down and are fixedly connected with the inner wall of the tail flue through screws.

3. The double-hearth structure of the double-drum reciprocating boiler as claimed in claim 1, wherein: the water circulation system comprises a main hearth (1), wherein two sides of the inner wall of the main hearth are respectively provided with a row of water wall tubes, the upper ends of the water wall tubes are directly communicated with the upper drum (3), and the lower ends of the water wall tubes are supplied with water by the lower drum (4) through the lower header.

4. The double-hearth structure of the double-drum reciprocating boiler as claimed in claim 1, wherein: the convection bank (7) is provided with four groups, and two ends of the convection bank (7) are respectively fixed with the upper and lower drums in a welding manner.

5. The double-hearth structure of the double-drum reciprocating boiler as claimed in claim 1, wherein: and a fixing piece (9) is arranged at a position between the upper and lower drums in the auxiliary hearth (2), and the fixing piece (9) is built at a position between the two adjacent convection tube bundles (7) and is attached to the outer tube wall of the convection tube bundle (7).

6. The double-hearth structure of the double-drum reciprocating boiler as claimed in claim 1, wherein: the top end of the auxiliary hearth (2) is provided with a threaded groove (8), the upper drum (3) is spirally arranged in the threaded groove (8), and the upper drum (3) and the lower drum (4) are both hollow cylindrical structures.