CN106679174B - High-temperature hot-air furnace - Google Patents
High-temperature hot-air furnace Download PDFInfo
- Publication number
- CN106679174B CN106679174B CN201611243437.3A CN201611243437A CN106679174B CN 106679174 B CN106679174 B CN 106679174B CN 201611243437 A CN201611243437 A CN 201611243437A CN 106679174 B CN106679174 B CN 106679174B
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- cold air
- chamber
- secondary cold
- flue gas
- cavity
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- 238000010438 heat treatment Methods 0.000 claims abstract description 124
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000003546 flue gas Substances 0.000 claims abstract description 106
- 238000002485 combustion reaction Methods 0.000 claims abstract description 74
- 239000000779 smoke Substances 0.000 claims abstract description 56
- 239000002028 Biomass Substances 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 4
- 230000011218 segmentation Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- -1 feeds Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
- F24H3/088—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using solid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/189—Arrangement or mounting of combustion heating means, e.g. grates or burners using solid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a high-temperature hot-air furnace, which comprises: combustion chamber, high temperature heating chamber and medium temperature heating chamber. The combustion chamber comprises a biomass combustion pool and a smoke cavity, and the smoke cavity is communicated with the biomass combustion pool. The high-temperature heating chamber comprises a main flue, a secondary cold air heating cavity, a secondary cold air inlet and outlet cavity arranged at the rear end of the secondary cold air heating cavity, a secondary cold air turning-back cavity arranged at the front end of the high-temperature heating chamber, and a secondary cold air inlet and a secondary hot air outlet. The main flue is communicated with a flue gas cavity of the combustion chamber, and the flue gas is discharged to the medium-temperature heating chamber after heat exchange between the main flue and the secondary cold air. The medium temperature heating chamber comprises a smoke collecting cavity, a primary hot air outlet, a primary cold air inlet, a smoke outlet, a primary cold air heat exchange cavity arranged around the outer wall of the smoke collecting cavity, and a primary cold air turning-back chamber arranged at the front end of the medium temperature heating chamber around the inner wall of the smoke collecting cavity, wherein the primary cold air turning-back chamber is communicated with the primary cold air heat exchange cavity through a plurality of primary cold air heating pipes.
Description
Technical Field
The invention relates to the technical field of heat energy utilization, in particular to gas combustion and heating equipment.
Background
The hot blast stove is widely applied in China at the end of the 70 th century of 20 th century, and is a new generation product of electric heat sources and traditional steam power heat sources in many industries. The hot blast stove is a universal hot blast device, can be matched with drying equipment of various materials for use, is widely used for drying products in the fields of agriculture, chemical industry, chemical fertilizers, feeds, building materials, medicines, foods, metallurgy and the like, and can also be used for heating various facilities, dehumidifying storehouses and the like.
A direct biomass fuel hot blast stove as disclosed in chinese patent application No. 201510099728.9, comprising: a combustor configured to combust a fuel to produce high temperature flue gas; a high temperature cleaning device configured to receive the high temperature flue gas from the combustor and remove particulate dust contained in the high temperature flue gas at a temperature therein above 1000 ℃; and a wind mixing device configured to mix the dedusted high temperature flue gas from the high temperature cleaning device with external air to generate hot wind for drying the material, wherein a plurality of retaining walls are provided in the high temperature cleaning device, the plurality of retaining walls are provided to cause the high temperature flue gas from the burner to generate a swirling flow in the high temperature cleaning device, and to turn red and sticky when the temperature exceeds 1000 ℃ to trap particulate dust contained in the high temperature flue gas. However, the treatment process of the direct biomass fuel hot blast stove of the patent application is complex and the treatment cost is high, and the obtained hot blast is still difficult to reach the required purification level.
In addition, as disclosed in chinese patent application No. 201410344006.0, a multi-tube type high-temperature hot-air furnace with heart-shaped heat exchange tubes comprises a furnace body, a combustion chamber, a dust chamber and a heat exchange chamber, wherein the combustion chamber, the dust chamber and the heat exchange chamber are arranged in the furnace body, an air inlet and an air outlet are respectively arranged at two sides of the furnace body, an air inlet chamber is arranged at the upper end of the air outlet, an interlayer space is arranged between the furnace body and the heat exchange chamber, the interlayer space is a waste heat return air channel, one end of the waste heat return air channel is communicated with the air inlet, the other end of the waste heat return air channel is communicated with the air inlet chamber, a plurality of heart-shaped heat exchange tubes which horizontally penetrate the heat exchange chamber are arranged in the heat exchange chamber, the heart-shaped tip parts of the heart-shaped heat exchange tubes face downwards, two heart-shaped bevel edges are heating surfaces, a plurality of baffles are vertically arranged in the heat exchange chamber, an air chamber communicated with the heat exchange tubes are arranged at the side face of the heat exchange chamber, the heat exchange tubes at the upper half part of the heat exchange chamber are communicated with the air inlet chamber, the heat exchange tubes at the lower half part of the heat exchange chamber are communicated with the air outlet, a flue gas inlet chamber and the flue gas inlet chamber are arranged above the heat exchange chamber, the flue gas inlet chamber is communicated with the air chamber, the flue gas inlet, the flue gas and the air chamber is arranged, the flue gas, the heat and the heat through the heat horizontally arranged. However, the heart-shaped heat exchange tube multi-tube type hot air furnace disclosed by the patent application adopts a heating element to heat to obtain required hot air, so that the treatment cost is high, the consumption of electric resources is high, and the heat exchange tube multi-tube type hot air furnace is not suitable for large-scale application.
As disclosed in Chinese patent application 201110181124.0, a liquefied gas-fired high-temperature hot air furnace is provided with a waste heat return duct at the upper end of the furnace, wherein the waste heat return duct is communicated with an inner hot air chamber of the furnace and then is communicated with a hot air outlet through an outer hot air chamber; the hearth of the combustion furnace is communicated with a hot air outlet chamber of the combustion furnace through a hot air pipe, the hot air outlet chamber is communicated with a hot air buffer chamber through an air pipe and a draught fan, and the hot air buffer chamber is communicated with a waste heat return air channel through a pipe; in the combustion chamber of the combustion furnace, a plurality of liquefied gas combustion heads are uniformly distributed on the chassis, natural wind air inlet pipes are arranged on the chassis at intervals of the liquefied gas combustion heads, the bottom ends of the air inlet pipes penetrate through the chassis and are opened, and the top ends of the air inlet pipes extend into and are suspended in a hearth of the combustion furnace. However, the liquefied gas-fired high-temperature hot-air furnace cannot be adjusted according to different requirements to obtain hot air with different temperatures, and the application range is narrow.
Therefore, providing a device capable of heating a large amount of cold air, obtaining hot air with different required temperatures and fully utilizing heat energy is an urgent problem in the industry.
Disclosure of Invention
The invention aims to provide equipment capable of heating cold air in a large quantity, obtaining hot air with different required temperatures and fully utilizing heat energy.
According to an aspect of the present invention, there is provided a high temperature hot air furnace including: the hot-blast stove body is divided into a combustion chamber, a high-temperature heating chamber and a medium-temperature heating chamber along the longitudinal direction. The combustion chamber comprises a biomass combustion pool arranged at the lower part of the combustion chamber and a smoke cavity arranged above the biomass combustion pool, wherein the smoke cavity is communicated with the biomass combustion pool, and smoke generated by gasification combustion of biomass in the biomass combustion pool enters the smoke cavity. The high-temperature heating chamber comprises a main flue, a secondary cold air inlet and outlet cavity, a secondary cold air foldback cavity, a secondary cold air inlet and a secondary hot air outlet, wherein the secondary cold air inlet and outlet cavity is arranged at the rear end of the high-temperature heating chamber and surrounds the upper periphery of the inner wall of the main flue; the main flue is communicated with a flue gas cavity of the combustion chamber so as to heat secondary cold air in the high-temperature heating chamber by utilizing high-temperature flue gas from the combustion chamber, a secondary cold air inlet is communicated with a secondary cold air inlet and outlet cavity so as to blow the secondary cold air into the secondary cold air inlet and outlet cavity, the secondary cold air inlet and outlet cavity is communicated with a secondary cold air turning-back cavity through a secondary cold air heat exchange pipe, the secondary cold air enters the secondary cold air turning-back cavity through a part of the secondary cold air heat exchange pipe, flows back to the secondary cold air inlet and outlet cavity through another part of the secondary cold air heat exchange pipe after being turned back and heat exchanged, enters the secondary cold air heating cavity to perform encircling heat exchange, and is finally conveyed to a user through a secondary cold air outlet, and the flue gas is discharged to the medium-temperature heating chamber after the main flue gas and the secondary cold air heat exchange. The medium temperature heating chamber comprises a smoke collecting chamber, a primary cold air heat exchange chamber arranged around the outer wall of the smoke collecting chamber, a primary cold air foldback chamber arranged around the inner wall of the smoke collecting chamber at the front end of the medium temperature heating chamber, a primary hot air outlet arranged near the front end wall of the medium temperature heating chamber and a primary cold air inlet arranged near the rear end wall of the medium temperature heating chamber, and a smoke outlet arranged near the rear end wall of the medium temperature heating chamber and arranged in the smoke collecting chamber, wherein the primary cold air inlet is connected to the primary cold air foldback chamber through a primary cold air pipe, and the primary cold air foldback chamber is communicated with the primary cold air heat exchange chamber through a plurality of primary cold air heating pipes, so that primary cold air enters the primary cold air heat exchange chamber to perform secondary heat exchange with smoke in the smoke collecting chamber after primary heat exchange with the smoke in the smoke collecting chamber, the primary cold air is conveyed to a user through the primary hot air outlet after the secondary heat exchange is completed, and the smoke in the smoke collecting chamber is discharged to the environment through the smoke outlet after the secondary heat exchange is completed.
Optionally, the rear end of the main flue is closed, and the high-temperature heating chamber comprises a plurality of first flue gas branch pipes extending from the outer wall of the main flue to the secondary cold air heating cavity.
Optionally, the first flue gas branch pipe passes through the secondary cold air heating cavity and is communicated with a first flue gas area formed between the outer wall of the secondary cold air heating cavity and the inner wall of the high-temperature heating chamber, so that flue gas from the main flue is collected in the first flue gas area and is discharged to the medium-temperature heating chamber through a flue gas outlet arranged in the first flue gas area.
Optionally, a flue gas collecting area is formed between the outer wall of the primary cold air heating cavity in the medium temperature heating chamber and the inner wall of the medium temperature heating chamber, and flue gas from the first flue gas area enters the flue gas collecting area through a flue gas passing port on the front end wall of the medium temperature heating chamber.
Optionally, the medium temperature heating chamber further comprises a plurality of second flue gas branch pipes extending from the flue gas collecting area to the flue gas collecting cavity, and the second flue gas branch pipes are communicated with the flue gas collecting cavity so that flue gas in the flue gas collecting area enters the flue gas collecting cavity.
Optionally, the secondary hot air outlet is disposed adjacent the front end wall of the high temperature heating chamber and communicates with the secondary cold air heating chamber.
Preferably, the combustion chamber further comprises a preheating air inlet to be preheated arranged on the top wall of the combustion chamber, a preheating air outlet, a preheating cavity arranged around the outer wall of the flue gas cavity and a preheating air outlet pipe for exhausting the preheating air in the preheating cavity, wherein the preheating air enters the preheating cavity to be preheated through the preheating air inlet, and is pumped from the preheating cavity to the preheating air outlet pipe through the preheating air outlet and then is conveyed to the secondary cold air inlet of the high-temperature heating chamber.
Optionally, a baffle for separating the secondary cold air inlet and outlet cavity into a secondary cold air inflow area and a secondary cold air outflow area is arranged in the secondary cold air inlet and outlet cavity, the secondary cold air inlet is communicated with the secondary cold air inflow area of the secondary cold air inlet and outlet cavity, and the secondary cold air heating cavity is communicated with the secondary cold air outflow area of the secondary cold air inlet and outlet cavity.
Optionally, the secondary cold air inlet and outlet cavity is communicated with the secondary cold air returning cavity through two groups of secondary cold air heat exchange pipes, and the secondary cold air enters the secondary cold air returning cavity through the first group of secondary cold air heat exchange pipes and flows through the second group of secondary cold air heat exchange pipes after being converged, and then returns to the secondary cold air outflow area of the secondary cold air inlet and outlet cavity.
Optionally, a second fan is arranged in the secondary cold air heating cavity, and the second fan enables secondary cold air in the secondary cold air heating cavity to flow spirally around the cavity wall so that the secondary cold air in the secondary cold air heating cavity is heated uniformly, and the heat exchange time of the secondary cold air is prolonged.
Optionally, a first fan is arranged in the primary cold air heating cavity, and the first fan enables primary cold air in the primary cold air heating cavity to flow spirally around the cavity wall so that the primary cold air in the primary cold air heating cavity is heated uniformly, and the heat exchange time of the primary cold air is prolonged.
Optionally, the biomass combustion device further comprises a combustor arranged on the front end wall of the combustion chamber, a combustion-supporting gas inlet connected with the combustion-supporting fan is formed in the combustor, and high-temperature flame generated by combustion is sprayed into the flue gas cavity by the combustor to be mixed with biomass fuel gas from the biomass combustion pool for combustion.
Preferably, the burner is a gasoline burner, and a biomass fuel inlet is formed in one end wall of the combustion chamber so as to convey biomass fuel into the biomass combustion pool for gasification combustion. Alternatively, the burner may be a burner for biomass fuel, natural gas, heavy oil, or the like.
Alternatively, the burner may be commercially available.
Alternatively, the combustion chamber can be replaced by other combustion devices of fuel gas and oil besides a biomass combustion tank.
Optionally, a flue gas fan is arranged at the flue gas outlet of the first flue gas zone, and the flue gas fan enables the flue gas in the flue gas pipeline to be discharged in a spiral mode.
Wherein, the terms front, rear, front end, rear end and the like used in the present invention describe the positional relationship are defined with reference to the longitudinal direction of the hot-blast stove (the arrangement relationship of the combustion chamber, the high-temperature heating chamber, the medium-temperature heating chamber from front to rear).
The beneficial effects of the invention are as follows: (1) The high-temperature hot air furnace comprises a high-temperature heating chamber for heating secondary cold air and a medium-temperature heating chamber for heating primary cold air, so that hot air with different temperatures can be obtained; (2) The preheating cavity is additionally arranged in the combustion chamber, so that the temperature of the secondary cold air can be quickly and efficiently increased; (3) The high-temperature flue gas generated by biomass combustion is adopted to heat cold air, so that non-renewable resources can be saved; (4) The secondary cold air inlet and outlet cavity and the secondary cold air turning-back cavity are arranged in the high-temperature heating chamber, the turning-back process of the secondary cold air and the main flue is increased, the primary cold air turning-back chamber is arranged in the medium-temperature heating chamber, so that the turning-back process of the primary cold air in the smoke collecting cavity is increased, the heat exchange time of the primary cold air and the secondary cold air is prolonged, and the heat exchange is more sufficient; (5) The flue gas flows through the high-temperature heating chamber and the medium-temperature heating chamber, so that the heat of the high-temperature flue gas is fully utilized, and the temperature of the flue gas discharged to the environment is reduced.
Drawings
Fig. 1 is a schematic front view showing the construction of the high-temperature hot-air furnace of the present invention.
FIG. 2 shows a schematic cross-sectional view of the hot-air furnace of the present invention along the line A-A.
Fig. 3 is a schematic view showing the construction of a high-temperature heating chamber of the high-temperature hot-air furnace of the present invention.
Fig. 4 is a schematic view showing the construction of a medium-temperature heating chamber of the high-temperature hot-air furnace of the present invention.
Detailed Description
Referring to fig. 1 and 2, according to one non-limiting embodiment of the present invention, there is provided a high temperature hot air furnace including: the hot blast stove comprises a hot blast stove body, wherein the hot blast stove body is longitudinally divided into a combustion chamber 100, a high-temperature heating chamber 300 and a medium-temperature heating chamber 500.
The combustion chamber 100 comprises a biomass combustion pool 110 arranged at the lower part of the combustion chamber 100, a smoke cavity 130 arranged above the biomass combustion pool 110, a burner 120 arranged at the front end wall of the combustion chamber, a preheating air inlet 140 arranged at the top wall of the combustion chamber 100, a preheating air outlet 150, a preheating cavity 160 arranged around the outer wall of the smoke cavity 130 and a preheating air pumping pipe 170 for pumping out the preheating air in the preheating cavity 160, wherein the smoke cavity 130 is communicated with the biomass combustion pool 110, smoke and fire generated by gasifying and burning the biomass in the biomass combustion pool 110 enter the smoke cavity 130, the preheating air enters the preheating cavity 160 through the preheating air inlet 140 to be preheated, and the preheating air is pumped from the preheating cavity 160 to the preheating air pumping pipe 170 through the preheating air outlet 150 and then is conveyed to the high-temperature heating chamber 300. The burner 120 is a gas burner, a combustion-supporting gas inlet 122 connected with a combustion-supporting fan (not shown) is formed on the burner 120, and the burner 120 injects high-temperature flame generated by combustion into the flue gas cavity 130 to mix with the biomass gas from the biomass combustion pool 110 for combustion.
The high temperature heating chamber 300 includes a main flue 310, a secondary cool air heating chamber 330 formed around an outer wall of the main flue 310, a secondary cool air inlet and outlet chamber 360 provided at a rear end of the high temperature heating chamber 300 around an upper circumference of an inner wall of the main flue 310, a secondary cool air returning chamber 370 provided at a front end of the high temperature heating chamber 300 around an upper circumference of an inner wall of the main flue 310, and secondary cool air inlet 380 and secondary hot air outlet 390 provided at a top wall of the high temperature heating chamber 300.
As shown in fig. 3, the main flue 310 communicates with the flue gas chamber 130 of the combustion chamber 100 to heat the secondary cool air in the high temperature heating chamber 300 using the high temperature flue gas from the combustion chamber 100. A baffle 366 dividing the secondary cool air inlet and outlet chamber 360 into a secondary cool air inflow region 361 and a secondary cool air outflow region 365 is provided inside the secondary cool air inlet and outlet chamber 360. The secondary cold air inlet 380 is communicated with the secondary cold air inflow region 361 of the secondary cold air inlet and outlet chamber 360, and the secondary cold air heating chamber 330 is communicated with the secondary cold air outflow region 365 of the secondary cold air inlet and outlet chamber 360. The secondary cold air inlet and outlet cavity 360 is communicated with the secondary cold air returning cavity 370 through two groups of secondary cold air heat exchange pipes, and secondary cold air enters the secondary cold air returning cavity 370 through the first group of secondary cold air heat exchange pipes 367, flows through the second group of secondary cold air heat exchange pipes 376 after being converged, and returns to the secondary cold air outflow region 365 of the secondary cold air inlet and outlet cavity 360. The secondary hot air outlet 390 is disposed adjacent to the front end wall of the high temperature heating chamber 300 and communicates with the secondary cool air heating chamber 330. The secondary cold air enters the secondary cold air heating cavity 330 for circling heat exchange after being subjected to foldback heat exchange through the secondary cold air heat exchange pipe, and finally is delivered to a user through the secondary hot air outlet 390.
The rear end of the main flue 310 of the high-temperature heating chamber 300 is closed, and the high-temperature heating chamber 300 further comprises a plurality of first flue gas branch pipes 311 extending from the outer wall of the main flue 310 to the secondary cold air heating chamber 330. The first flue gas branch pipe 311 passes through the secondary cold air heating chamber 330 and is communicated with the first flue gas zone 320 formed between the outer wall of the secondary cold air heating chamber 330 and the inner wall of the high temperature heating chamber 300, so that the flue gas from the main flue 310 is discharged to the medium temperature heating chamber 500 through the flue gas outlet 325 provided in the first flue gas zone 320 after being collected in the first flue gas zone 320.
As shown in fig. 4, the medium temperature heating chamber 500 includes a smoke collecting chamber 510, a primary cool air heat exchanging chamber 530 provided around an outer wall of the smoke collecting chamber 510, a primary cool air returning chamber 540 provided around an inner wall of the smoke collecting chamber 510 at a front end wall of the medium temperature heating chamber 500, a primary hot air outlet 560 provided at the primary cool air heat exchanging chamber 530 adjacent to a front end of the medium temperature heating chamber 500, a primary cool air inlet 570 provided at a rear end wall of the medium temperature heating chamber 500, and a smoke outlet 580 provided at the smoke collecting chamber 510 adjacent to a rear end wall of the medium temperature heating chamber 500. A flue gas collecting region 520 is formed between the outer wall of the primary cold air heating chamber 530 in the intermediate temperature heating chamber 500 and the inner wall of the intermediate temperature heating chamber 500, and flue gas from the first flue gas region 320 enters the flue gas collecting region 520 via a flue gas passing opening 522. The medium temperature heating chamber 500 further comprises a plurality of second flue gas branches 525 extending from the flue gas collection region 520 towards the flue gas collection chamber 510, the second flue gas branches 525 communicating with the flue gas collection chamber 510 to allow flue gas in the flue gas collection region 520 to enter the flue gas collection chamber 510.
The primary cold air inlet 570 is connected to the primary cold air turning-back chamber 540 through a primary cold air pipe 575, the primary cold air turning-back chamber 540 is communicated with the primary cold air heat exchange cavity 530 through a plurality of primary cold air heating pipes 550, primary cold air exchanges heat with smoke in the smoke collecting cavity 510 in the turning-back process, so that primary cold air enters the primary cold air heat exchange cavity 530, the smoke in the smoke collecting cavity 510 and smoke in the second smoke branch pipe 525 for secondary heat exchange, and then is conveyed to a user through the primary hot air outlet 560, and the smoke in the smoke collecting cavity 510 is discharged to the environment through the smoke outlet 580 after heat exchange is completed.
As an alternative embodiment, the combustion chamber 100 further comprises a waste residue outlet (not shown) provided in the side wall to discharge waste residue generated by the combustion of biomass out of the stove.
As an alternative embodiment two, the combustion chamber 100 may not include the to-be-preheated wind inlet 140, the preheated wind outlet 150, the preheating chamber 160, and the preheated wind outlet 170. The secondary air inlet of the high temperature heating chamber 300 is directly connected with the secondary air source through a pipeline.
As an alternative embodiment three, the burner 120 is a fuel-fired burner.
As an alternative embodiment, a flue gas fan (not shown) is disposed at the flue gas outlet 325 of the first flue gas zone 320, and the flue gas fan discharges the flue gas in the flue gas duct in a spiral shape to increase the residence time of the flue gas in the flue gas duct.
Although preferred embodiments of the present invention have been described in detail herein, it is to be understood that the invention is not limited to the precise construction and steps set forth herein, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention. In addition, parameters such as temperature, flow rate, full pressure, concentration or time in the present invention may be appropriately selected within the scope of the present disclosure according to specific use conditions.
Claims (10)
1. A high temperature hot blast stove comprising: the hot-blast stove body, the hot-blast stove body is combustion chamber, high temperature heating chamber and medium temperature heating chamber along vertical segmentation, its characterized in that:
the combustion chamber comprises a biomass combustion pool arranged at the lower part of the combustion chamber and a smoke cavity arranged above the biomass combustion pool, wherein the smoke cavity is communicated with the biomass combustion pool, and smoke generated by gasification combustion of biomass in the biomass combustion pool enters the smoke cavity;
the high-temperature heating chamber comprises a main flue, a secondary cold air heating cavity formed around the outer wall of the main flue, a secondary cold air inlet and outlet cavity arranged at the rear end of the high-temperature heating chamber around the upper periphery of the inner wall of the main flue, a secondary cold air turning cavity arranged at the front end of the high-temperature heating chamber around the upper periphery of the inner wall of the main flue, and a secondary cold air inlet and a secondary hot air outlet arranged at the top wall of the high-temperature heating chamber; the main flue is communicated with the flue gas cavity of the combustion chamber so as to heat secondary cold air in the high-temperature heating chamber by utilizing high-temperature flue gas from the combustion chamber, the secondary cold air inlet is communicated with the secondary cold air inlet and outlet cavity so as to blow the secondary cold air into the secondary cold air inlet and outlet cavity, the secondary cold air inlet and outlet cavity is communicated with the secondary cold air returning cavity through a secondary cold air heat exchange pipe, the secondary cold air enters the secondary cold air returning cavity through a part of the secondary cold air heat exchange pipe, flows through another part of the secondary cold air heat exchange pipe after being converged, returns to the secondary cold air inlet and outlet cavity, the secondary cold air is communicated with the secondary cold air inlet and outlet cavity, the secondary cold air enters the secondary cold air heating cavity after returning heat exchange through the secondary cold air heat exchange pipe to perform encircling heat exchange, and finally is conveyed to a user through the secondary hot air outlet, and the flue gas is discharged to the medium-temperature heating chamber after the secondary cold air heat exchange; and
the medium temperature heating chamber comprises a smoke collecting chamber, a primary cold air heat exchange chamber arranged around the outer wall of the smoke collecting chamber, a primary cold air turning-back chamber arranged around the inner wall of the smoke collecting chamber at the front end of the medium temperature heating chamber, a primary hot air outlet arranged near the front end wall of the medium temperature heating chamber and arranged at the rear end wall of the medium temperature heating chamber, and a primary cold air inlet arranged near the rear end wall of the medium temperature heating chamber and arranged at the smoke collecting chamber, wherein the primary cold air inlet is connected to the primary cold air turning-back chamber through a primary cold air pipe, and the primary cold air turning-back chamber is communicated with the primary cold air heat exchange chamber through a plurality of primary cold air heating pipes, so that primary cold air enters the primary cold air heat exchange chamber after primary heat exchange is carried out on smoke in the primary cold air heat exchange chamber, secondary heat exchange is carried out on the smoke in the smoke collecting chamber, the secondary heat exchange is carried out on the smoke through the primary hot air outlet to a user, and the smoke in the smoke collecting chamber is discharged to the environment after primary heat exchange is completed.
2. The high temperature hot air furnace of claim 1, wherein the rear end of the main flue is closed, and the high temperature heating chamber comprises a plurality of first flue gas branches extending from the outer wall of the main flue to the secondary cold air heating chamber.
3. The high-temperature hot-air furnace according to claim 2, wherein the first flue gas branch pipe passes through the secondary cold-air heating chamber and is communicated with a first flue gas zone formed between an outer wall of the secondary cold-air heating chamber and an inner wall of the high-temperature heating chamber, so that flue gas from the main flue is discharged to the medium-temperature heating chamber through a flue gas outlet provided in the first flue gas zone after being collected in the first flue gas zone.
4. A high temperature hot blast stove as claimed in claim 3, wherein a flue gas collecting zone is formed between the outer wall of the primary cold air heating chamber in the intermediate temperature heating chamber and the inner wall of the intermediate temperature heating chamber, flue gas from the first flue gas zone entering the flue gas collecting zone via a flue gas passage opening in the front end wall of the intermediate temperature heating chamber.
5. The high temperature hot blast stove as claimed in claim 4, wherein said medium temperature heating chamber further comprises a plurality of second flue gas branches extending from said flue gas collecting region to said flue gas collecting chamber, said second flue gas branches communicating with said flue gas collecting chamber for letting flue gas in said flue gas collecting region into said flue gas collecting chamber.
6. The high temperature hot air furnace of claim 5, wherein the secondary hot air outlet is disposed adjacent a front end wall of the high temperature heating chamber and communicates with the secondary cold air heating chamber.
7. The high-temperature hot-air furnace according to any one of claims 1 to 6, wherein the combustion chamber further comprises a preheating air inlet provided at a top wall of the combustion chamber, a preheating air extraction port, a preheating chamber provided around an outer wall of the flue gas chamber, and a preheating air extraction pipe for extracting preheating air in the preheating chamber, the preheating air entering the preheating chamber through the preheating air inlet to be preheated, and the preheating air being sucked from the preheating chamber to the preheating air extraction pipe through the preheating air extraction port and then being conveyed to the secondary cold air inlet of the high-temperature heating chamber.
8. The high-temperature hot-air furnace according to any one of claims 1 to 6, wherein a baffle plate for dividing the secondary cold-air inlet and outlet chamber into a secondary cold-air inflow region and a secondary cold-air outflow region is arranged in the secondary cold-air inlet and outlet chamber, the secondary cold-air inlet is communicated with the secondary cold-air inflow region of the secondary cold-air inlet and outlet chamber, and the secondary cold-air heating chamber is communicated with the secondary cold-air outflow region of the secondary cold-air inlet and outlet chamber.
9. The high-temperature hot air furnace according to claim 8, wherein the secondary cold air inlet and outlet cavity is communicated with the secondary cold air returning cavity through two groups of secondary cold air heat exchange pipes, and secondary cold air enters the secondary cold air returning cavity through a first group of secondary cold air heat exchange pipes to be converged and then flows through a second group of secondary cold air heat exchange pipes to return to a secondary cold air outflow area of the secondary cold air inlet and outlet cavity.
10. The high-temperature hot-air furnace according to any one of claims 1 to 6, further comprising a burner arranged on the front end wall of the combustion chamber, wherein a combustion-supporting gas inlet connected with a combustion-supporting fan is formed in the burner, and the burner sprays high-temperature flame generated by combustion into the flue gas cavity to be mixed with biomass fuel gas from the biomass combustion tank for combustion.
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| CN107990545A (en) * | 2018-01-16 | 2018-05-04 | 广西节得乐生物质能源科技有限公司 | A kind of biomass thermal wind furnace heat-exchanger rig |
| CN108165727B (en) * | 2018-03-16 | 2023-10-27 | 索罗克电子科技有限公司 | Brass steel wire diffusion furnace |
| CN109028569B (en) * | 2018-09-09 | 2024-01-05 | 无锡博众热能环保设备有限公司 | Flue gas full-cycle hot-blast stove |
| CN110686311B (en) * | 2019-10-25 | 2024-07-19 | 中山市创尔特智能家居科技有限公司 | Gas fireplace |
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