CN220771879U - Air inlet and smoke exhaust device of ash blowing furnace hearth - Google Patents
Air inlet and smoke exhaust device of ash blowing furnace hearth Download PDFInfo
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- CN220771879U CN220771879U CN202322591738.7U CN202322591738U CN220771879U CN 220771879 U CN220771879 U CN 220771879U CN 202322591738 U CN202322591738 U CN 202322591738U CN 220771879 U CN220771879 U CN 220771879U
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- air inlet
- smoke
- pipe
- furnace
- chimney
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- 239000000779 smoke Substances 0.000 title claims abstract description 67
- 238000007664 blowing Methods 0.000 title claims abstract description 39
- 239000000428 dust Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 21
- 239000003546 flue gas Substances 0.000 abstract description 21
- 239000007789 gas Substances 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses an air inlet and smoke exhaust device of a furnace chamber of an ash blowing furnace, wherein a double-layer chimney is vertically arranged at the rear side of the furnace body of the ash blowing furnace to form a closed cavity between an inner pipe and an outer pipe; the two sides of the upper part of the outer tube are communicated with an air inlet pipe, and the air inlet end of the air inlet pipe is connected with the outlet end of the blower; the outlet of the air inlet pipe is respectively communicated with a hearth air inlet arranged at the rear side of the furnace body; the rear side of the lower part of the inner tube is provided with a smoke outlet, and the inlet of the smoke outlet pipeline is communicated with the smoke outlet of the hearth; the bottom of the inner tube is integrally provided with a dust collecting cavity, and an ash receiving box is detachably arranged in the dust collecting cavity; the device forms the countercurrent heat exchange of cold air and hot flue gas through the arrangement of the double-layer chimney and the reasonable arrangement of the air inlet pipe, the air inlet pipe and the smoke outlet, fully utilizes the waste heat of the flue gas, improves the heat exchange efficiency, reduces the smoke exhaust temperature, is favorable for the deposition of harmful gas in the flue gas, reduces the pollution of the smoke exhaust to the environment, improves the uniformity of the temperature in the hearth, and improves the quality and effect of ash blowing.
Description
Technical Field
The utility model belongs to the technical field of ash blowing furnaces, and particularly relates to an air inlet and smoke exhaust device of a furnace chamber of an ash blowing furnace.
Background
Fire gold test (lead gold test) is an important means for chemical analysis of gold, silver and noble metals, and its key technology is in the ash blowing process, so it is also called as ash blowing method. The principle of the ash blowing process is that the lead alloy obtained by smelting is placed in a cupel, and ash blowing is carried out at a proper temperature to remove lead, and the lead is oxidized into lead oxide and permeates into the porous cupel during ash blowing, so that lead and a small amount of base metals in a lead button are removed, and gold and silver and noble metals are not oxidized but remain in the cupel to form gold and silver alloy particles.
The circulation of air in the ash blowing furnace is important, and relates to the effect of oxidizing and removing lead and impurities in the ash blowing process, a flue and an air inlet are generally arranged in the furnace body of the ash blowing furnace, a chimney is arranged above the furnace body, air is blown into a hearth during ash blowing, impurities in a lead button are oxidized, most of impurities are absorbed in a porous cupel along with lead oxide, and a small part of oxides are discharged as gas. In the prior art, a plurality of samples are detected by an ash blowing furnace at the same time, the content of the samples and the obtained lead button size are different, the air inlet temperature of a furnace chamber is low in the ash blowing process, the temperature uniformity in the furnace chamber is affected, the ash blowing temperature and the air flow in the furnace are changed, and the quality and the effect of ash blowing are reduced; the exhaust gas temperature is high, so that energy waste is caused, and the environment is polluted.
Disclosure of Invention
The utility model aims to solve the technical problems, and provides the air inlet and smoke exhaust device of the furnace chamber of the lime-blowing furnace, which is compact in design structure, is provided with a double-layer chimney, and utilizes the high-temperature waste heat of smoke to improve the temperature of air entering the furnace, preheat the air inlet of the lime-blowing furnace, improve the heat exchange efficiency, reduce the smoke exhaust temperature, facilitate the deposition and cleaning of harmful gas in the smoke and reduce the pollution of smoke exhaust to the environment.
The technical scheme adopted by the utility model is as follows: the air inlet and smoke exhaust device of the furnace hearth of the lime blowing furnace comprises a double-layer chimney vertically arranged at the rear side of the furnace body of the lime blowing furnace, an outer pipe is sleeved outside the middle of an inner pipe of the double-layer chimney, an annular top plate and an annular bottom plate are fixedly arranged between the top and the bottom of the outer pipe and the inner pipe respectively to form a closed cavity between the inner pipe and the outer pipe, two partition plates are vertically and fixedly arranged in the closed cavity, and the inner pipe and the outer pipe are symmetrically separated into two closed cavities; the two sides of the upper part of the outer tube are respectively communicated with an air inlet pipe, and the air inlet end of the air inlet pipe is connected with the outlet end of the blower; an air inlet pipe is fixedly arranged on two sides of the lower part of the outer pipe respectively, and an outlet of the air inlet pipe is communicated with a hearth air inlet arranged on the rear side of the furnace body respectively; the rear side of the lower part of the inner tube is provided with a smoke outlet, and the inlet of the smoke outlet pipeline is communicated with the smoke outlet of the hearth; the bottom of the inner tube is integrally provided with a dust collecting cavity, and an ash receiving box is detachably arranged in the dust collecting cavity.
The inner tube and the outer tube of the double-layer chimney are concentrically sleeved, the cross sections of the inner tube and the outer tube are rectangular, and the inner tube and the outer tube are made of stainless steel.
The air inlet pipe is formed by combining a circular chimney pipe and an elbow, the chimney pipe is bent downwards by 90 degrees, a pagoda joint is welded at an air inlet port of the chimney pipe, and the pagoda joint is connected with an outlet end pipeline of the blower.
The dust collecting cavity is in an L-shaped shape with the lower part wider than the upper part, the front top plate of the dust collecting box is higher than the box body, a long waist hole is formed in the middle of the front top plate, a threaded hole is formed in the middle of the front side plate of the dust collecting cavity, the dust collecting box is inserted into the dust collecting cavity and then fixed in the dust collecting cavity through a screw, and a concave groove is formed in the middle of the front end of the bottom plate of the dust collecting cavity.
The air inlet pipe is a square pipe, is horizontally connected to the outer pipe and is bent towards the direction of the air inlet of the hearth through 90 degrees, a flange is fixedly arranged at the outlet of the air inlet pipe, and the size of the outlet of the air inlet pipe is matched with the size of the air inlet of the hearth.
The flue gas outlet pipeline port is fixedly provided with a chimney flange, four corners of the chimney flange are provided with long waist holes, and the double-layer chimney is fixedly connected to the rear side frame of the furnace body through the chimney flange.
The top of the double-layer chimney inner tube is provided with a smoke discharging cover, and the smoke discharging cover can be automatically controlled to be opened or closed through a smoke discharging mechanism.
Two partition boards are vertically and fixedly arranged in the closed cavity, and symmetrically divide the space between the inner pipe and the outer pipe into two closed cavities; the two sides of the upper part of the outer tube are respectively communicated with an air inlet pipe, and the air inlet end of the air inlet pipe is connected with the outlet end of the blower; an air inlet pipe is fixedly arranged on two sides of the lower part of the outer pipe respectively, and an outlet of the air inlet pipe is communicated with a hearth air inlet arranged on the rear side of the furnace body respectively; the rear side of the lower part of the inner tube is provided with a smoke outlet, and the inlet of the smoke outlet pipeline is communicated with the smoke outlet of the hearth; the purpose of this arrangement is: cold air enters an air inlet pipe through an air blower, enters a closed cavity between the inner pipe and the outer pipe of the double-layer chimney from two sides of the upper part of the outer pipe, exchanges heat with hot flue gas in the inner pipe, and turns into preheated air which is downwards along the outer pipe and enters an air inlet of a hearth through an air inlet pipe for ash blowing; the temperature of the hot flue gas precooling air of the hearth entering from the rear side smoke outlet at the lower part of the inner pipe is also reduced, harmful substances in the flue gas are cooled into smoke dust which falls into a dust collection box at the bottom of the inner pipe to be discharged, and the cooled flue gas is upwards along the inner pipe and is discharged from the smoke outlet at the upper part of the inner pipe in a controlled manner; the cold air exchanges heat with the flue gas through countercurrent arrangement, so that the heat exchange efficiency is high, the waste heat of the flue gas is better utilized, the energy cost is saved, the deposition of harmful gases in the flue gas is facilitated, and the pollution of the flue gas to the environment is reduced.
The utility model has the beneficial effects that: through the arrangement of the double-layer chimney and the reasonable arrangement of the air inlet pipe, the air inlet pipe and the smoke outlet, the countercurrent heat exchange of cold air and hot smoke is formed, the smoke waste heat is fully utilized, the heat exchange efficiency is improved, the smoke exhaust temperature is reduced, the deposition of harmful gas in the smoke is facilitated, the pollution of the smoke exhaust to the environment is reduced, the uniformity of the temperature in a hearth is improved, and the quality and the effect of ash blowing are improved.
Drawings
FIG. 1 is a schematic diagram of a rear view structure of an air intake and exhaust device of the present utility model;
FIG. 2 is a schematic view of a section A-A of the air intake and exhaust device of the present utility model;
FIG. 3 is a schematic perspective view of the air intake and exhaust device of the present utility model;
fig. 4 is a schematic perspective view of the ash receiving box of the present utility model.
The marks in the figure: 1. a double-layer chimney; 2. an inner tube; 3. an outer tube; 4. an air inlet pipe; 5. an air inlet pipe; 6. a partition plate; 7. closing the cavity; 8. a chimney; 9. an elbow; 10. a pagoda joint; 11. a flange; 12. a smoke outlet; 13. a chimney flange; 14. a dust collection chamber; 15. and (5) an ash receiving box.
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
As shown in fig. 1-4, an air intake and smoke exhaust device of a furnace chamber of a lime-blowing furnace comprises a double-layer chimney 1 vertically arranged at the rear side of the furnace body of the lime-blowing furnace, an outer tube 3 is sleeved outside the middle of an inner tube 2 of the double-layer chimney 1, an annular top plate and an annular bottom plate are fixedly arranged between the top and the bottom of the outer tube 3 and the inner tube 2 respectively to form a closed cavity 7 between the inner tube 2 and the outer tube 3, two partition plates 6 are vertically and fixedly arranged in the closed cavity 7, and the inner tube 2 and the outer tube 3 are symmetrically separated into two closed cavities 7; the two sides of the upper part of the outer tube 3 are respectively communicated with an air inlet tube 4, and the air inlet end of the air inlet tube 4 is connected with the outlet end of the blower; an air inlet pipe 5 is fixedly arranged on two sides of the lower part of the outer pipe 3 respectively, and the outlet of the air inlet pipe 5 is communicated with a hearth air inlet arranged on the rear side of the furnace body respectively; the rear side of the lower part of the inner tube 2 is provided with a smoke outlet 12, and the inlet of a pipeline of the smoke outlet 12 is communicated with a smoke channel port of the hearth; the bottom of the inner tube 2 is integrally provided with a dust collecting cavity 14, and an ash receiving box 15 is detachably arranged in the dust collecting cavity 14, so that the dust deposited in the ash receiving box 15 can be conveniently and timely removed.
The inner tube 2 and the outer tube 3 of the double-layer chimney 1 are concentrically sleeved, the cross sections of the inner tube 2 and the outer tube 3 are rectangular, and the material is stainless steel.
The air inlet pipe 4 is formed by combining a circular chimney pipe 8 and an elbow 9, the chimney pipe is bent downwards by 90 degrees, a pagoda joint 10 is welded at an air inlet port of the chimney pipe 8, and the pagoda joint 10 is connected with an outlet end pipeline of the blower. The connector for quick connection of the pneumatic pipeline by using the pagoda connector 10 is convenient to assemble and disassemble and reliable in performance.
The dust collection cavity 14 is in an L-shaped shape with the lower part wider than the upper part, the front top plate of the dust collection cavity 15 is higher than the box body, a long waist hole is formed in the middle of the front top plate, a threaded hole is formed in the middle of the front side plate of the dust collection cavity 14, the dust collection cavity 15 is fixed in the dust collection cavity 14 through a screw after being inserted into the dust collection cavity 14, a concave groove is formed in the middle of the front end of the bottom plate of the dust collection cavity 14, and the dust collection cavity 15 is convenient to extract.
The air inlet pipe 5 is square pipe, and the air inlet pipe 5 is horizontally connected on the outer pipe to through 90 bending to furnace air intake direction, the exit fixed flange 11 that is provided with of air inlet pipe 5, the exit size of air inlet pipe and the size looks adaptation of furnace air intake make things convenient for air inlet pipe threaded connection to fix in furnace air intake department.
The flue gas outlet 12 is fixedly provided with a chimney flange 13 at a pipeline port, long waist holes are formed in four corners of the chimney flange 13, and the double-layer chimney 1 is fixedly connected to a rear side frame of the furnace body through the chimney flange 13 in a threaded manner.
The top of the inner tube 2 of the double-layer chimney 1 is provided with a smoke discharging cover, the smoke discharging cover can be automatically controlled to be opened or closed through a smoke discharging mechanism, a cube smoke discharging cover and a circular discharge port are fixedly arranged on the external threads of the smoke discharging cover, smoke is discharged in a concentrated mode, and the smoke is prevented from overflowing during smoke discharging, so that the environment is polluted.
The operation process of the air inlet and smoke exhaust device of the furnace hearth of the lime blowing furnace is as follows:
the air blower blows cold air into air inlet pipes 4 at two sides of the upper part of the double-layer chimney 1, the cold air respectively enters two closed cavities 7 at two sides between an inner pipe 2 and an outer pipe 3 of the double-layer chimney 1, a smoke outlet 12 at one side of the lower part of the inner pipe 2 is communicated with a hearth smoke discharging channel, hot smoke of a hearth enters from the lower part of the inner pipe 2, cold air runs from top to bottom in the closed cavities 7, hot smoke runs from bottom to top in the inner pipe 2, countercurrent heat exchange is carried out on the cold air in the closed cavities 7 and the hot smoke in the inner pipe 2, and the cold air is changed into preheated air which downwards enters the hearth air inlet through an air inlet pipe 5 along the closed cavities 7 for use when ash is blown by an ash blowing furnace; the temperature of the hot flue gas of the hearth in the inner pipe 2 is reduced when the hot flue gas meets cold air, microparticles and harmful substances in the hot flue gas are cooled to form smoke dust which falls into an ash receiving box 15 at the bottom of the inner pipe to be discharged in a concentrated manner, and the cooled flue gas is upwards along the inner pipe 2 and is discharged from a discharge port at the upper part of the inner pipe in a controlled manner; the cold air and the hot flue gas exchange heat through countercurrent arrangement, so that the heat exchange efficiency is high, the flue gas waste heat is better utilized, the air entering the hearth is preheated, the uniformity of the temperature in the hearth is improved, the quality and effect of ash blowing are improved, the energy cost is saved, the deposition of harmful gases in the flue gas is facilitated, and the pollution of the flue gas to the environment is reduced.
In addition to the above embodiments, other embodiments of the present utility model are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are included in the scope of protection claimed by the present utility model.
Claims (7)
1. An air inlet fume extractor of ash blowing furnace, its characterized in that: the device comprises a double-layer chimney vertically arranged at the rear side of a furnace body of the gray blowing furnace, wherein an outer tube is sleeved outside the middle of an inner tube of the double-layer chimney, an annular top plate and a bottom plate are fixedly arranged between the top and the bottom of the outer tube and the inner tube respectively to form a closed cavity between the inner tube and the outer tube, two partition plates are vertically and fixedly arranged in the closed cavity, and the inner tube and the outer tube are symmetrically separated into two closed cavities; the two sides of the upper part of the outer tube are respectively communicated with an air inlet pipe, and the air inlet end of the air inlet pipe is connected with the outlet end of the blower; an air inlet pipe is fixedly arranged on two sides of the lower part of the outer pipe respectively, and an outlet of the air inlet pipe is communicated with a hearth air inlet arranged on the rear side of the furnace body respectively; the rear side of the lower part of the inner tube is provided with a smoke outlet, and the inlet of the smoke outlet pipeline is communicated with the smoke outlet of the hearth; the bottom of the inner tube is integrally provided with a dust collecting cavity, and an ash receiving box is detachably arranged in the dust collecting cavity.
2. The air and smoke intake and exhaust device for a furnace of an ash blowing furnace according to claim 1, wherein: the inner tube and the outer tube of the double-layer chimney are sleeved concentrically, the cross sections of the inner tube and the outer tube are rectangular, and the inner tube and the outer tube are made of stainless steel.
3. The air and smoke intake and exhaust device for a furnace of an ash blowing furnace according to claim 1, wherein: the air inlet pipe is formed by combining a circular chimney pipe and an elbow, the chimney pipe is bent downwards by 90 degrees, a pagoda joint is welded at an air inlet port of the chimney pipe, and the pagoda joint is connected with an outlet end pipeline of the blower.
4. The air and smoke intake and exhaust device for a furnace of an ash blowing furnace according to claim 1, wherein: the air inlet pipe is a square pipe, is horizontally connected to the outer pipe and is bent towards the direction of the air inlet of the hearth through 90 degrees, a flange is fixedly arranged at the outlet of the air inlet pipe, and the size of the outlet of the air inlet pipe is matched with the size of the air inlet of the hearth.
5. The air and smoke intake and exhaust device for a furnace of an ash blowing furnace according to claim 1, wherein: a chimney flange is fixedly arranged at the port of the smoke outlet pipeline, long waist holes are formed in four corners of the chimney flange, and the double-layer chimney is fixedly connected to the rear side frame of the furnace body through the chimney flange in a threaded mode.
6. The air and smoke intake and exhaust device for a furnace of an ash blowing furnace according to claim 1, wherein: the dust collecting cavity is in an L-shaped shape with the lower part wider than the upper part, the front top plate of the dust collecting box is higher than the box body, a long waist hole is formed in the middle position of the front top plate, a threaded hole is formed in the middle position of the front side plate of the dust collecting cavity, the dust collecting box is inserted into the dust collecting cavity and then fixed in the dust collecting cavity through a screw, and a concave groove is formed in the middle of the front end of the bottom plate of the dust collecting cavity.
7. The air and smoke intake and exhaust device for a furnace of an ash blowing furnace according to claim 1, wherein: the top of the double-layer chimney inner tube is provided with a smoke discharging cover, and the smoke discharging cover can be automatically controlled to be opened or closed through a smoke discharging mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322591738.7U CN220771879U (en) | 2023-09-25 | 2023-09-25 | Air inlet and smoke exhaust device of ash blowing furnace hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322591738.7U CN220771879U (en) | 2023-09-25 | 2023-09-25 | Air inlet and smoke exhaust device of ash blowing furnace hearth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220771879U true CN220771879U (en) | 2024-04-12 |
Family
ID=90605331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322591738.7U Active CN220771879U (en) | 2023-09-25 | 2023-09-25 | Air inlet and smoke exhaust device of ash blowing furnace hearth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220771879U (en) |
-
2023
- 2023-09-25 CN CN202322591738.7U patent/CN220771879U/en active Active
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