CN210398869U

CN210398869U - Steam boiler using pulverized coal and sludge as biomass fuel

Info

Publication number: CN210398869U
Application number: CN201920840033.5U
Authority: CN
Inventors: 冯伟; 张朋波; 董雪; 张文玉; 马卫平
Original assignee: Shandong Dongneng Power Technology Co ltd
Current assignee: Shandong Dongneng Power Technology Co ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-04-24
Anticipated expiration: 2029-06-05

Abstract

The utility model relates to a buggy, mud biomass fuel's steam boiler, including the platform and install batcher, boiling combustion chamber, furnace, deposit room, convection chamber, intercommunication flue and the afterbody flue on the platform, the discharge gate and the boiling combustion chamber of batcher pass through the inlet pipe intercommunication, boiling combustion chamber and isobaric plenum between install the air distribution plate, furnace's air inlet and boiling combustion chamber's gas outlet intercommunication, furnace's inside formation suspension chamber, the pulverized coal burner is installed to the lower part in the furnace, the mid-mounting has the explosion vent. The utility model has the advantages that: not only various biomass sludge is treated, but also the biomass sludge is fully combusted and the discharge is ultralow; but also can save energy consumption by taking the coal as a substitute of fire coal.

Description

Steam boiler using pulverized coal and sludge as biomass fuel

Technical Field

The utility model relates to an industrial boiler field especially relates to a buggy, mud biomass fuel's steam boiler and method thereof.

Background

At present, industrial enterprises such as printing and dyeing, papermaking, leather, oil extraction and the like in China can generate a large amount of biomass sludge, the calorific value of the biomass sludge is about 3000kcal/kg, and the biomass sludge is an ideal boiler fuel after being processed.

The existing biomass boiler has the problems of insufficient combustion, high pollutant emission and the like due to low combustion temperature.

Disclosure of Invention

For overcoming the defects of the prior art, the utility model provides a pulverized coal, mud biomass fuel's steam boiler, the technical scheme of the utility model is that:

a steam boiler of pulverized coal and sludge biomass fuel comprises a platform, a feeder, a boiling combustion chamber, a hearth, a settling chamber, a convection chamber, a communicating flue and a tail flue, wherein the feeder, the boiling combustion chamber, the hearth, the settling chamber, the convection chamber, the communicating flue and the tail flue are arranged on the platform, a discharge port of the feeder is communicated with the boiling combustion chamber through a feeding pipe, an air distribution plate is arranged between the boiling combustion chamber and an isobaric air chamber, an air inlet of the hearth is communicated with an air outlet of the boiling combustion chamber, a suspension chamber is formed inside the hearth, a pulverized coal burner is arranged at the lower part in the hearth, an explosion-proof door is arranged in the middle of the hearth, the air outlet of the hearth is communicated with the air inlet of the settling chamber, an air outlet of the settling chamber is communicated with the air inlet of the convection chamber, an ash falling hopper is arranged at the air outlet of the settling, the air outlet of the convection chamber is communicated with the air inlet of the tail flue through a communicating flue, and an ash falling hopper is also arranged at the smoke outlet of the tail flue.

The device is characterized by further comprising a steam drum, wherein the steam drum is communicated with the upper part of the suspension chamber through a header, a descending pipe is further installed on the steam drum, and the descending pipe is communicated with the lower parts of the settling chamber, the convection chamber and the suspension chamber through another header.

The convection mechanism sequentially comprises a convection coil pipe, a low-temperature superheater, a medium-temperature superheater and a high-temperature superheater from top to bottom, and a water-cooled wall heating surface is arranged on the inner wall of the convection chamber.

And a denitration device, an economizer and an air preheater are sequentially arranged in the tail flue.

The inner wall of the settling chamber is provided with a water-cooled wall heating surface of the settling chamber, and the inner wall of the suspension chamber is a hearth water-cooled wall.

The device also comprises a slag discharge pipe, one end of the slag discharge pipe is positioned outside the isobaric air chamber, and the other end of the slag discharge pipe extends into the isobaric air chamber and is arranged on the air distribution plate.

The utility model has the advantages that: not only various biomass sludge is treated, but also the biomass sludge is fully combusted and the discharge is ultralow; but also can save energy consumption by taking the coal as a substitute of fire coal.

Drawings

Fig. 1 is a schematic view of the main structure of the present invention.

Detailed Description

The invention will be further described with reference to specific embodiments, the advantages and features of the invention will become more apparent as the description proceeds. These examples are merely illustrative and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Referring to fig. 1, the utility model relates to a pulverized coal, mud biomass fuel's steam boiler, including platform 23 and install batcher 4, boiling combustion chamber 24, furnace 25, deposit room 26, convection chamber 27, intercommunication flue 22 and afterbody flue 28 on platform 23, the discharge gate of batcher 4 and boiling combustion chamber 24 pass through inlet pipe 3 intercommunication, boiling combustion chamber 24 and isobaric wind chamber 1 between install air distribution plate 20, isobaric wind chamber is provided with air inlet 2, furnace 25's air inlet and boiling combustion chamber 24's gas outlet intercommunication, furnace 25's inside forms the suspension room, and coal burner 5 is installed to the lower part in the furnace 25, and the mid-mounting has explosion-proof door 7, and this furnace 25's gas outlet and deposit room 26's air inlet intercommunication, this deposit room 26's gas outlet and convection chamber 27's air inlet intercommunication, at deposit room 26's gas outlet department, The ash falling hopper 28 is installed to the air inlet department of convection chamber 27 and one side of boiling combustion chamber 24, and installs a slag trap 21 in the gas outlet slope of settling chamber 26, the convection chamber in install convection mechanism, also install an ash falling hopper 28 in the smoke outlet department of this afterbody flue through intercommunication flue intercommunication between the air outlet of convection chamber and the air inlet of afterbody flue, the pulverized coal burner adopt low-nitrogen cyclone burner.

The device is characterized by further comprising a steam drum 9, wherein the steam drum is communicated with the upper part of the suspension chamber through a header, a descending pipe 10 is further installed on the steam drum, and the descending pipe is communicated with the lower parts of the settling chamber, the convection chamber and the suspension chamber through another header.

The convection mechanism comprises a convection coil pipe 11, a low-temperature superheater 13, a medium-temperature superheater 14 and a high-temperature superheater 15 in sequence from top to bottom, and a water-cooled wall heating surface 12 is arranged on the inner wall of the convection chamber.

And a denitration device 16, an economizer 17 and an air preheater 18 are sequentially arranged in the tail flue.

The inner wall of the settling chamber 26 is provided with a water-cooled wall heating surface 8 of the settling chamber, and the inner wall of the suspension chamber is a hearth water-cooled wall 6.

The device also comprises a slag discharge pipe 19, one end of the slag discharge pipe 19 is positioned outside the isobaric air chamber 1, the other end of the slag discharge pipe 19 extends into the isobaric air chamber 1, and the slag discharge pipe is arranged on the air distribution plate 20.

The utility model discloses a theory of operation is: the biomass sludge is added into a boiling combustion chamber through a feeder to be burnt, and the generated fiery flame and high-temperature flue gas enter a hearth to heat a water-cooled wall radiation heating surface. The device is characterized in that a pulverized coal burner is arranged in a hearth, the hot flame generated by pulverized coal combustion can further and fully combust gas products generated by incomplete combustion of biomass sludge, mixed gas generated by combustion of the two gases passes through a suspension chamber and then turns to enter a settling chamber, flue gas absorbs heat from a water-cooled wall of the peripheral settling chamber in the settling chamber and then is further cooled, a large amount of fly ash is discharged from an ash hopper in the settling chamber, and the flue gas rises again and sequentially passes through a high-temperature superheater, a medium-temperature superheater, a low-temperature superheater and a convection coil pipe. Then enters a denitration device, an economizer and an air preheater through the flue and enters a next desulfurization treatment system through a smoke outlet.

Claims

1. A steam boiler using pulverized coal and sludge as biomass fuels is characterized by comprising a platform, a feeder, a boiling combustion chamber, a hearth, a settling chamber, a convection chamber, a communicating flue and a tail flue, wherein the feeder, the boiling combustion chamber, the hearth, the settling chamber, the convection chamber, the communicating flue and the tail flue are arranged on the platform, a discharge port of the feeder is communicated with the boiling combustion chamber through a feed pipe, an air distribution plate is arranged between the boiling combustion chamber and an isobaric air chamber, an air inlet of the hearth is communicated with an air outlet of the boiling combustion chamber, a suspension chamber is formed inside the hearth, a pulverized coal burner is arranged at the lower part inside the hearth, an explosion-proof door is arranged in the middle of the hearth, the air outlet of the hearth is communicated with the air inlet of the settling chamber, an air outlet of the settling chamber is communicated with the air inlet of the convection chamber, an ash falling hopper is, the convection chamber is internally provided with a convection mechanism, an air outlet of the convection chamber is communicated with an air inlet of the tail flue through a communicating flue, and an ash falling hopper is also arranged at a smoke outlet of the tail flue.

2. The pulverized coal and sludge biomass fuel steam boiler as claimed in claim 1, further comprising a steam drum, wherein the upper part of the steam drum is communicated with the upper part of the suspension chamber through a header, and the steam drum is further provided with a downcomer which is communicated with the lower parts of the settling chamber, the convection chamber and the suspension chamber through another header.

3. The pulverized coal and sludge biomass fuel steam boiler according to claim 1 or 2, wherein the convection mechanism comprises a convection coil, a low temperature superheater, a medium temperature superheater and a high temperature superheater in sequence from top to bottom, and a water wall heating surface is arranged on the inner wall of the convection chamber.

4. The steam boiler using pulverized coal and sludge as biomass fuels according to claim 1 or 2, wherein a denitration device, an economizer and an air preheater are sequentially installed in the tail flue.

5. The steam boiler using pulverized coal and sludge as biomass fuels according to claim 1, wherein the inner wall of the settling chamber is provided with a water-cooled wall heating surface of the settling chamber, and the inner wall of the suspension chamber is a hearth water-cooled wall.

6. The steam boiler using pulverized coal and sludge as fuel of claim 1, further comprising a slag discharge pipe, wherein one end of the slag discharge pipe is located outside the isobaric chamber, and the other end of the slag discharge pipe extends into the isobaric chamber and is mounted on the air distribution plate.