CN210662824U - Boiler slag-discharging-free system - Google Patents
Boiler slag-discharging-free system Download PDFInfo
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- CN210662824U CN210662824U CN201921793125.9U CN201921793125U CN210662824U CN 210662824 U CN210662824 U CN 210662824U CN 201921793125 U CN201921793125 U CN 201921793125U CN 210662824 U CN210662824 U CN 210662824U
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Abstract
The utility model discloses a boiler slag discharge-free system. After heat exchange is carried out on high-temperature flue gas combusted in the hearth, waste flue gas is formed and is discharged after passing through a cloth bag dust removal device and a desulfurizing tower; the return air chamber is arranged at the bottom of the hearth and comprises an air inlet and an air outlet, the air outlet is arranged at the top of the return air chamber and supplies air to the bottom of the hearth, the air inlet of the return air chamber is connected with waste flue gas, the inlet of a boiler induced draft fan is communicated with the bag dust removal device, and the outlet of the boiler induced draft fan is respectively communicated with the desulfurizing tower and the air inlet of the return air chamber; the air distribution plate is arranged at the top of the material returning air chamber, and the air outlets of the material returning air chamber are distributed on the air distribution plate. The utility model has the advantages that the material returning air chamber is arranged at the bottom of the hearth, and the waste residue particles at the bottom of the hearth are blown back to the combustion area through the air outlet of the material returning air chamber to be burnt out and refined, so that the slag extractor is not required to be arranged, and the slag discharging effect is not required; the air introduced by the material returning air chamber comes from waste flue gas, the oxygen content is low, the oxygen content at the outlet of the boiler can be effectively reduced, and the reduction of the concentration of a NOx source opening is facilitated.
Description
Technical Field
The utility model relates to a burning boiler row's sediment field, in particular to boiler exempts from to arrange sediment system.
Background
The combustion boiler is an industrial common device, the common boiler adopts coal water slurry and spray pulverized coal as fuel, but the existing boiler has waste residues deposited at the bottom of a hearth after the fuel is combusted in the hearth.
The existing mode of clearing up the waste residue is that, set up the slag extractor bottom furnace to set up the row's cinder pond in the boiler below, arrange the cinder pond and be equipped with the water seal groove in the cinder pond, the waste residue falls into the row's cinder pond after the fuel burns out, accumulates a certain amount of back and discharges the cinder pond through the slag extractor and at last by the artifical waste residue of clearing up and transport away.
Above-mentioned current sediment mode of arranging needs artifical clearance, wastes time and energy to the sediment machine water seal also takes away the partial heat in the furnace, is unfavorable for the stability of low-load burning, influences efficiency.
The waste slag still needs to be treated additionally, so that the economic loss is increased, and the waste slag can still be combusted further to provide energy, so that how to more fully utilize fuel and reduce or even not generate waste slag is an important technical problem in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a slag discharge free system of boiler that abundant burning fuel just need not to arrange the sediment.
In order to achieve the above object, the utility model discloses a following technical scheme, the sediment system is exempted from to the boiler, including the furnace body, form furnace in the furnace body, the waste gas of burning in the furnace body forms the waste flue gas through filtering and sack dust collector, and the waste flue gas discharges behind the desulfurizing tower, still includes:
a material returning air chamber: the return air chamber is arranged at the bottom of the hearth and comprises a return air chamber air inlet and a return air chamber air outlet, the return air chamber air outlet is arranged at the top of the return air chamber and supplies air to the bottom of the hearth, and the return air chamber air inlet is connected with waste flue gas;
boiler draught fan: an inlet of a boiler induced draft fan is communicated with the bag-type dust removal device, and an outlet of the boiler induced draft fan is respectively communicated with an air inlet of the desulfurizing tower and an air inlet of the material returning air chamber;
air duct: the air duct is used for conveying flue gas and communicating all the devices;
air distribution plate: the air distribution plate is arranged at the top of the material returning air chamber, and the air outlets of the material returning air chamber are regularly distributed on the air distribution plate.
The utility model discloses the slag discharging free system of boiler, through set up the return plenum in the bottom of furnace, blow the waste residue granule in the bottom of furnace back to the combustion zone and burn up and refine through the air outlet that the return plenum set up according to the rule, realize need not to set up the slag extractor, need not to arrange the effect of slag; the air introduced by the material returning air chamber comes from waste flue gas, the oxygen content is low, the oxygen content at the outlet of the boiler can be effectively reduced, and the reduction of the concentration of a source opening of nitrogen oxide is facilitated; blowing unburned waste slag particles at the original bottom to generate a fluidized suspension effect, fully burning and improving the thermal efficiency of the boiler; the slag extractor is not required to be detached, the labor intensity of manual slag removal is reduced, the heat absorption of the water seal tank is reduced, the stability of low-load combustion is improved, and the high heat efficiency is high.
In some embodiments, the top of the air distribution plate is provided with an air cap, and the air cap is arranged corresponding to the air outlet of the material returning air chamber. The wind cap is arranged, and wind pressure enhancement is carried out through the wind cap, so that the air outlet direction is controlled.
In some embodiments, the hood includes hood vents, which are distributed laterally of the hood as set. The blast cap exhaust vent sets up at the blast cap side for set for blast cap air-out position produces the whirlwind, realizes the fluidization suspension effect of deposit waste residue.
In some embodiments, the hood outlet opening is oriented horizontally downward 15 °. The air outlet of the blast cap blows air downwards to directly blow the waste residue deposited at the bottom.
In some embodiments, a casting layer is cast on the top of the air distribution plate, the casting layer isolates the hearth from the air distribution plate, and the hood comprises a hood connecting pipe which penetrates through the casting layer and is respectively communicated with the hood and the air outlet of the material returning air chamber. And a pouring layer is arranged to prevent the material returning air chamber from overheating and deforming.
In some embodiments, a furnace door is arranged on one side of the furnace body, and the lower edge of the furnace door is higher than the blast cap connecting pipe. The furnace door is arranged, so that the air distribution plate is convenient to observe and maintain.
In some embodiments, the system further comprises a secondary induced draft fan, and the secondary induced draft fan is arranged between the material returning air chamber and the boiler induced draft fan. And a secondary induced draft fan is arranged to enhance the air supply flow velocity and pressure intensity.
In some embodiments, the sum of the areas of the hood outlet openings is less than the area of the grid plate. The sum of the areas of the air outlet holes of the hood is far smaller than the area of the air distribution plate, and the air outlet flow speed and the air pressure of the air outlet holes of the hood are enhanced.
In some embodiments, the exposed portion of the air duct is made of thermal insulation material. And a heat insulation material pipeline is adopted, so that heat loss is reduced, and the heat efficiency is improved.
The utility model has the advantages that: the slag discharge-free system of the boiler reduces the wind speed of the introduced wind by arranging the material returning wind chamber, and then the wind speed is distributed on the wind distribution plate according to the rule, thereby playing the effects of stabilizing the pressure and equalizing the flow; the resistance is recombined by the air distribution plate, air is uniformly distributed by arranging an air cap, the direction of air flow is changed, the air flow speed is improved, rotating air is formed by design, bottom waste residues are blown to sink, fluidized suspension of the waste residues is realized, the waste residues are re-burned in a combustion area and refined, the heat efficiency is enhanced, the waste residues are greatly reduced, and even fine particles are directly taken away by waste gas without slag discharge; by introducing the waste flue gas, the oxygen content at the outlet of the boiler can be effectively reduced, and the reduction of the concentration of the nitrogen oxide source opening is facilitated.
Drawings
FIG. 1 is a schematic structural view of a slag discharge-free system of a boiler according to the present invention;
FIG. 2 is a schematic structural view of the bottom of the boiler of the present invention;
FIG. 3 is a schematic side view of the structure of FIG. 2;
FIG. 4 is a schematic view of a depression of the return plenum;
fig. 5 is an enlarged view of a portion a of fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, the slag discharge system is exempted from to boiler, including furnace body 1, form furnace 2 in the furnace body 1, the waste gas of burning forms the exhaust gas through filtering and sack dust collector 11 in furnace 2, and the exhaust gas discharges after desulfurizing tower 12, still includes:
the material returning air chamber 3 is arranged at the bottom of the hearth 2, the material returning air chamber 3 comprises a material returning air chamber air inlet 31 and a material returning air chamber air outlet 32, the material returning air chamber air outlet 32 is arranged at the top of the material returning air chamber 3 and supplies air to the bottom of the hearth 2, and the material returning air chamber air inlet 31 is connected with waste flue gas;
the inlet of the boiler induced draft fan 4 is communicated with the bag-type dust collector 11, and the outlet of the boiler induced draft fan 4 is respectively communicated with the desulfurizing tower 12 and the air inlet 31 of the material returning air chamber;
the air channel 5 is used for conveying flue gas and communicating all devices;
and the air distribution plate 6 is arranged at the top of the material returning air chamber 3, and the air outlets 32 of the material returning air chamber are distributed on the air distribution plate 6 as required.
The top of the air distribution plate 6 is provided with an air cap 8, the air cap 8 is arranged corresponding to the air outlet 32 of the return air chamber, the air cap 8 is 200mm higher than the air distribution plate, and the pouring layer 7 with the thickness of 200mm is conveniently arranged.
The hood 8 comprises a hood air outlet 81, and the hood air outlet 81 is distributed in the lateral direction of the hood 8 according to a set requirement.
The opening direction of the hood air outlet 81 is 15 degrees horizontally downwards.
The pouring layer 7 is poured on the top of the air distribution plate 6, the pouring layer 7 isolates the hearth 2 from the air distribution plate 6, the air cap 8 comprises an air cap connecting pipe 82, and the air cap connecting pipe 82 penetrates through the pouring layer 7 and is respectively communicated with the air cap 8 and the air outlet 32 of the material returning air chamber. The pouring layer 7 is poured by adopting a fireproof high-temperature-resistant material.
One side of the furnace body 1 is provided with a furnace door 13, the lower edge of the furnace door 13 is higher than the blast cap connecting pipe 82, and the lower edge of the furnace door 13 is higher than the blast cap connecting pipe 8210 mm.
The device also comprises a secondary induced draft fan 41, wherein the secondary induced draft fan 41 is arranged between the material returning air chamber 3 and the boiler induced draft fan 4.
The sum of the areas of the air outlet holes 81 of the air cap is smaller than the area of the air distribution plate 6.
The exposed part of the air duct 5 adopts a heat insulation material pipeline, the heat insulation material adopts 50mm glass heat insulation cotton, and the heat insulation material is wrapped by aluminum foil.
The utility model discloses exempt from to arrange sediment principle working process:
as shown in fig. 1, fuel is put into a hearth 2 from the left side of a boiler body 1, the fuel is combusted in the hearth 2, flue gas and waste residues are generated after the combustion, the flue gas enters a heat exchange device, a cloth bag dust removal device 11 and a desulfurization tower 12 through a transmission pipeline for purification, the flue gas is discharged to the atmosphere after meeting the environmental protection standard, and the waste residues are deposited to the bottom of the hearth 2 under the influence of gravity; the bottom of a hearth 2 is provided with a return air chamber 3, a boiler induced draft fan 4 is arranged between a cloth bag dust removal device 11 and a desulfurizing tower 12, 10% -20% of waste flue gas is led out to be used as circulating flue gas and is conveyed into the return air chamber 3 through a secondary induced draft fan 41, the return air chamber 3 discharges the waste flue gas to the hearth 2 through a return air chamber air outlet 32, and deposited waste slag at the bottom of the hearth 2 is brought up, so that the waste slag forms rotary fluid and returns to a combustion area upwards for secondary combustion until the waste slag is burnt out and refined, no waste slag is deposited, and the slag-discharging-free effect without slag discharging is realized.
As shown in fig. 2, in order to modify the existing boiler, the original scheme in the figure is to adopt a slag extractor, arrange a water-sealed tank C at the bottom of the boiler, remove the slag extractor after modification, leave the water-sealed tank C idle, and install a material returning air chamber 3 at the bottom of a hearth 2;
referring to fig. 3 to 5, it can be seen that the returning air chamber 3 introduces the waste flue gas through the returning air chamber air inlet 31, the waste flue gas decelerates after entering the returning air chamber 3 to convert kinetic energy into static potential energy, the gas in the returning air chamber 3 uniformly distributes to enter the returning air chamber air outlet 32 on the air distribution plate 6, and enters the hood 8 through the hood connecting pipe 82, and finally is discharged to the hearth 2 through the hood outlet 81;
because the area of the wind distribution plate 6 is far larger than the total area of the hood air outlet holes 81, the flow speed and the air pressure of the air discharged from the hood air outlet holes 81 become stronger;
the angle of the gas discharged from the blast cap outlet hole 81 is influenced by the arrangement direction of the blast cap outlet hole 82, which is 15 degrees below the horizontal direction in the embodiment, the gas in the direction can be well impacted and deposited on the waste residue at the bottom of the hearth 2, and the waste residue is blown and suspended to form fluid, so that the waste residue can be conveniently and further burnt out;
a pouring layer 7 is arranged between the air distribution plate 6 and the hearth 2, high-temperature-resistant materials with the thickness of 200mm are poured, the air distribution plate 6 and the material returning air chamber 3 are prevented from being directly deformed due to high temperature, and the hood 8 is made of high-temperature-resistant materials.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.
Claims (9)
1. Boiler exempts from to arrange sediment system, including furnace body (1), form furnace (2) in furnace body (1), the waste gas of burning in furnace (2) forms the exhaust gas through sack dust collector (11), the exhaust gas discharges after desulfurizing tower (12), its characterized in that still includes:
the material returning air chamber (3) is arranged at the bottom of the hearth (2), the material returning air chamber (3) comprises a material returning air chamber air inlet (31) and a material returning air chamber air outlet (32), the material returning air chamber air outlet (32) is arranged at the top of the material returning air chamber (3) and supplies air to the bottom of the hearth (2), and the material returning air chamber air inlet (31) is connected with waste flue gas;
the inlet of the boiler induced draft fan (4) is communicated with the bag-type dust removal device (11), and the outlet of the boiler induced draft fan (4) is respectively communicated with the desulfurizing tower (12) and the air inlet (31) of the material returning air chamber;
the air channel (5) is used for conveying smoke and communicated with each device;
the air distribution plate (6), the air distribution plate (6) is arranged at the top of the material returning air chamber (3), and the air outlet (32) of the material returning air chamber is distributed on the air distribution plate (6).
2. The boiler slag-free system according to claim 1, wherein a hood (8) is arranged at the top of the air distribution plate (6), and the hood (8) is arranged corresponding to the air outlet (32) of the return air chamber.
3. The boiler slagging-free system according to claim 2, wherein the hood (8) comprises hood vents (81), said hood vents (81) being distributed laterally of the hood (8).
4. The boiler slagging-free system according to claim 3, wherein the hood outlet (81) is horizontally downwardly directed at 15 °.
5. The boiler slag-free system according to claim 2, wherein a casting layer (7) is cast on the top of the air distribution plate (6), the casting layer (7) isolates the hearth (2) from the air distribution plate (6), the hood (8) comprises a hood adapter (82), and the hood adapter (82) penetrates through the casting layer (7) and is respectively communicated with the hood (8) and the return plenum air outlet (32).
6. The boiler slag-free system according to claim 5, wherein one side of the furnace body (1) is provided with a furnace door (13), and the lower edge of the furnace door (13) is higher than the blast cap connecting pipe (82).
7. The boiler slagging-free system according to claim 1, further comprising a secondary induced draft fan (41), wherein the secondary induced draft fan (41) is arranged between the return air chamber (3) and the boiler induced draft fan (4).
8. The boiler slagging-free system according to claim 3, wherein the sum of the areas of the hood outlet openings (81) is smaller than the area of the air distribution plate (6).
9. The boiler slagging-free system according to claim 1, wherein the exposed part of the air duct (5) is made of heat insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921793125.9U CN210662824U (en) | 2019-10-23 | 2019-10-23 | Boiler slag-discharging-free system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921793125.9U CN210662824U (en) | 2019-10-23 | 2019-10-23 | Boiler slag-discharging-free system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210662824U true CN210662824U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921793125.9U Active CN210662824U (en) | 2019-10-23 | 2019-10-23 | Boiler slag-discharging-free system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210662824U (en) |
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2019
- 2019-10-23 CN CN201921793125.9U patent/CN210662824U/en active Active
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