CN214426200U

CN214426200U - Hot-blast stove

Info

Publication number: CN214426200U
Application number: CN202120400609.3U
Authority: CN
Inventors: 王国强; 齐新洲; 马月虹; 刘娜; 王彦; 王文博; 刘涛; 张彩虹; 姜鲁艳; 罗文杰; 刘小龙
Original assignee: Agricultural Mechanization Research Institute Xinjiang Academy of Agricultural Sciences
Current assignee: Agricultural Mechanization Research Institute Xinjiang Academy of Agricultural Sciences
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-10-19
Anticipated expiration: 2031-02-22

Abstract

The utility model provides a hot blast stove, which comprises a shell, a combustion system, a heat exchange system and a smoke and dust removal system; the combustion system comprises a first combustion chamber and a second combustion chamber which are limited in a shell, the first combustion chamber is communicated with the second combustion chamber, a fuel bin for limiting the fuel chamber is arranged in the first combustion chamber, and a sieve pore and a discharge port for communicating the first combustion chamber with the fuel chamber are formed in the wall surface of the fuel bin; the heat exchange system comprises a heat exchange cavity defined in the shell, and the heat exchange cavity is positioned on the periphery of at least one of the first combustion cavity and the second combustion cavity; the smoke discharging and dust removing system comprises a smoke discharging and dust removing cavity limited by the shell, and the smoke discharging and dust removing cavity is communicated with the second combustion cavity. The utility model provides a hot blast stove, both solve the incomplete, insufficient problem of burning, filter the smoke and dust that burns the production through the dust pelletizing system of discharging fume again, reach the effect of environmental protection, reduction pollutant discharge.

Description

Hot-blast stove

Technical Field

The utility model relates to a combustion apparatus technical field especially relates to a hot-blast furnace.

Background

The hot blast stove mainly comprises a stove base, a stove body, a heat exchanger, a centrifugal fan, a conveying air duct and other parts, and two cavities which are not communicated with each other are formed and separated. The air is used as a flowing medium between the cavities, so that heat exchange is generated. If the pressure of the hearth and the combustion state need to be monitored in real time, an automatic monitoring and control system needs to be matched. Based on fuel and heat source division, the hot blast stove mainly has four forms of coal, fuel oil, fuel gas, biomass fuel and the like, and has two main forms of direct and indirect based on a heating mode.

The direct heating hot blast stove is characterized in that after fuel is fully combusted, flue gas is directly heated and dried without passing through a heat exchanger. The hot blast stove is only provided with a burner and is not provided with a heat exchanger. The temperature of the flue gas in the furnace can reach about 800 ℃, and the furnace has the characteristics of small heat loss, low cost and the like, and the fuel consumption of the furnace is about half of that of other indirect heaters. In summary, direct heating is the best choice without affecting quality.

Fuels for direct heating stoves can be divided into three categories: solid fuels (e.g., coke, biomass material); liquid fuels (e.g., diesel, kerosene); gaseous fuels (e.g. natural gas, liquefied gas).

The solid fuel hot blast stove can be divided into a layer combustion type, a suspension combustion type and a boiling type according to the combustion mode, and can be divided into a suspension combustion type, a layer combustion type and a boiling type based on the solid fuel hot blast stove. In addition, the grate-fired furnace is different from different coal feeding modes, and is classified into an upper feeding type fixed grate furnace, a chain furnace, a reciprocating grate furnace and the like. The suspension combustion furnace and the fluidized bed furnace have the characteristics of complex process, large equipment investment and the like. And the fluidized bed furnace is difficult to be applied to large, medium and small hot blast furnaces. In summary, the combustion mode of most hot blast stoves is the layer combustion type, and belongs to the layer combustion furnace. Mainly uses a hand-fired coal hot-blast stove and a machine-fired coal hot-blast stove as main application objects.

The liquid fuel hot blast stove takes fuel oil such as heavy oil, kerosene and diesel oil as fuel, but the price is higher. If the combustion is insufficient, air pollution may result. Therefore, it is not recommended for greenhouse warming.

In addition, the target material can be directly heated by contacting or radiating with electric energy.

Indirect heating hot blast stoves have become more and more widely used in environments with higher requirements. Among them, three types of hot-blast stoves, such as a ductless hot-blast stove, a tubular hot-blast stove, and a heat-pipe hot-blast stove, are most widely used.

The pipeless hot blast stove consists of a fuel supply structure, a chimney, a hearth, a heat exchanger and the like. The heat exchanger of vertical non-tube hot blast stove is located vertically over the hearth to maintain vertical posture. Coal as fuel is combusted in the hearth, and generated flue gas is volatilized upwards through the channel and is discharged out of the hearth through the smoke outlet after being circulated.

Compared with a tubeless hot blast stove, the flue gas of the tube type hot blast stove exchanges heat with air through the channel, and the structure is commonly used for an indirect heating type hot blast stove. The main disadvantages are that the heat load is distributed unevenly, the volume is large, and the disassembly and the transportation are not facilitated; its advantages include low cost, simple structure, high adaptability and easy installation and maintenance. The tube array hot blast stove mainly comprises a hearth, a tube array heat exchanger, a flue, a chimney and the like. For realizing air convection, the heat exchanger can exchange the heat of flue gas to one side with lower temperature through the pipe wall of the hot blast stove. In practical application, the shell and tube hot blast stove can be divided into the following parts: firstly, dividing the hot blast stove into a vertical hot blast stove and a horizontal hot blast stove according to the placement form; and secondly, the hot blast stove can be divided into a split type and an integral type according to the configuration mode of the hot blast stove and the heat exchanger.

The heat pipe type hot blast stove transmits heat to the heat pipe heat exchanger by utilizing the heat pipe and then transmits the heat to the heating device. The heat is transferred by means of evaporation and condensation of working medium in the fully-closed space. The hot-pipe type hot-blast stove has the advantages of outstanding characteristics, temperature controllability, convenience in heat regulation, support for remote heat transfer and the like. The heat pipe type heat exchanger comprises a heat pipe consisting of a pipe shell, a capillary liquid absorption core, a working medium and the like. One end of the heat pipe is an evaporation part, the other end is a condensation part, and a heat insulation part is arranged in the middle. The heat exchange is completed in the circulation process, and the heat pipe has the characteristics of strong heat transfer characteristic, changeable heat flux density and the like. Heat pipe heat exchangers are widely used in constant temperature laboratories, but are rarely used in solar greenhouses.

Further, the hot blast stove heated by heat medium comprises two types of heating oil heating type and steam heating type according to different heat media. The fuel of the heat-conducting oil heating type hot blast stove is coal, heavy oil, combustible gas and the like, and the heat-conducting oil is used as a reaction device of a heat carrier. The circulating oil pump forcibly circulates the liquid phase, transfers the heat energy to the heater, and heats the air to generate hot air. The heat conducting oil returns to the heating furnace after heat exchange and then passes through the heating process again, and the operation is repeated. The steam heating type hot blast stove heats cold air by using the heat exchanger to generate hot air, and the heat source is steam, so the steam heating type hot blast stove has the characteristics of small cleaning pollution, high cost, large volume and the like.

Besides the hot blast stoves, the heating devices may be in the form of electric heaters, solar collectors, and the like. The electric heater is composed of the electric heating element and the heating box body, electric energy is converted into heat energy by heating the resistance element (such as a resistance wire, a radiation element and the like), the electric heater has the characteristics of convenience in use, small pollution, simple structure, lower cost, high control precision and the like, and is widely applied to areas with rich capacitance. But the electric heater consumes more energy in the heating process and is less applied to greenhouses. The solar air heat collector is only applied sporadically in partial solar energy enrichment areas.

Two processes need to be fully considered in combination with the hot blast stove: combustion and heat exchange. At present, the following three problems mainly exist:

first, heat exchange between high-temperature flue gas and clean air. The flue gas temperature on the heat exchange surface at one side of the carbon steel pipe and the steel plate can reach 1400 ℃ at most, and meanwhile, the flue gas also has direct heat radiation from a high-temperature hearth, wherein the heat radiation contains composite heat exchange coefficients including convection and radiation;

and secondly, the heat transfer coefficient between the smoke and the air. In the low-temperature area of the flue gas, the heat transfer coefficient between the flue gas and the air is small, so that the heat transfer area is increased, and the compactness is reduced. Meanwhile, under the condition of the same heat load, the hot blast stove needs a larger heat transfer area compared with other steam boilers or hot water boilers;

thirdly, the problem of dust deposition. Because the heat transfer area of the hot blast stove is large, the hot blast stove is polluted by smoke for a long time, and the ash deposition condition of the pipeline is serious, so that attention should be paid.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hot blast stove for solve among the prior art straw burn produce a large amount of smoke and dust and burn insufficient defect, both solved the incomplete insufficient problem of burning, filter the effect that the smoke and dust that burns the production reaches environmental protection, reduction pollutant emission through the dust pelletizing system of discharging fume again.

The utility model provides a hot blast stove, include:

a housing;

the combustion system comprises a first combustion chamber and a second combustion chamber which are limited in a shell, the first combustion chamber is communicated with the second combustion chamber, a fuel bin for limiting the fuel chamber is arranged in the first combustion chamber, and a sieve pore and a discharge port for communicating the first combustion chamber with the fuel chamber are formed in the wall surface of the fuel bin;

a heat exchange system including a heat exchange cavity defined within a housing, the heat exchange cavity being located at a periphery of at least one of the first combustion cavity and the second combustion cavity;

the smoke discharging and dust removing system comprises a smoke discharging and dust removing cavity limited by the shell, and the smoke discharging and dust removing cavity is communicated with the second combustion cavity.

According to the utility model provides a hot blast stove, be equipped with the burning radiating piece in the casing, the burning radiating piece is equipped with combustion-supporting gas import and exhaust port, the intercommunication is made to the limit of burning radiating piece combustion-supporting gas import with the exhaust port the second combustion chamber, the exhaust port with it communicates to discharge fume the dust removal chamber, the outside of burning radiating piece with restrict out between the casing the heat transfer chamber, the casing seted up with heat transfer import and the heat transfer export of heat transfer chamber intercommunication, first combustion chamber is located at least one side in heat transfer chamber.

According to the utility model, the outer wall of the combustion heat dissipation piece is provided with at least one of a first heat dissipation piece and a second heat dissipation piece;

the first side of the shell is provided with the heat exchange inlet, the second side of the shell is provided with the heat exchange outlet, the first side and the second side are oppositely arranged, and the first radiating fins extend along the direction from the first side to the second side;

the heat exchange inlet and the heat exchange outlet are provided with a distance in the height direction, and the second radiating fins extend in the height direction.

According to the utility model provides a hot-blast stove, set up the first side of casing the heat transfer import, set up the second side of casing the heat transfer export, first side with the second side sets up relatively, the burning radiating piece has seted up the edge first lateral direction the heat transfer hole that the direction of second side link up, set up the reinforcing radiating piece in the heat transfer hole, the reinforcing radiating piece with be equipped with ventilation gap between the wall in heat transfer hole.

According to the utility model provides a hot-blast stove, the second combustion intracavity is equipped with and separates the net, first combustion chamber with the intercommunication mouth of second combustion chamber intercommunication is located separate the below of net, the combustion-supporting gas import is located separate the below of net.

According to the utility model provides a hot-blast furnace, it includes first cavity and second cavity to discharge fume the dust removal chamber, first cavity with second combustion chamber intercommunication, be equipped with out the tuber pipe in the second cavity, the outer wall connection who goes out the tuber pipe has the spiral water conservancy diversion piece, the import that goes out the tuber pipe is located the below of spiral water conservancy diversion piece, the second cavity with the intercommunication position of first cavity is located the top of spiral water conservancy diversion piece.

According to the utility model provides a hot-blast furnace, still be equipped with the cover in the second chamber and locate the honeycomb duct in the spiral water conservancy diversion piece outside, go out the tuber pipe with the flow channel is flowed in the restriction between the honeycomb duct, the second chamber passes through flow channel with the import intercommunication of play tuber pipe.

According to the utility model provides a hot-blast furnace, the bunker includes the cylindricality section and is located the toper section of cylindricality section lower extreme, the bottom shrink of toper section forms the discharge gate, the cylindricality section with the direction of height evenly distributed of toper section is a plurality of the sieve mesh.

According to the utility model provides a hot blast stove, the bunker is equipped with the lid, the lid with the casing seals to be connected.

According to the utility model provides a hot-blast stove, first burning chamber with second burning chamber level sets up side by side, the outside in second burning chamber is encircleed the heat transfer chamber, the dust removal chamber of discharging fume is located the top in second burning chamber.

The utility model provides a hot-blast furnace, through forming combustion system, heat exchange system and the dust pelletizing system of discharging fume in the casing, form the integral type structure, help simplifying the structure of hot-blast furnace. The combustion system comprises a first combustion chamber and a second combustion chamber, namely, fuel is subjected to two-stage combustion treatment in the combustion system, so that the full combustion of the fuel is facilitated, and the problem of insufficient combustion of the fuel is solved. In at least one process of primary combustion and secondary combustion, heat released by fuel exchanges heat with a heat exchange medium in a heat exchange cavity of a heat exchange system, and the heat exchange medium absorbs heat and then is discharged out of the heat exchange cavity so as to use the heat carried by the heat exchange medium for production and life. The flue gas that the fuel burning produced discharges to the dust removal chamber of discharging fume through the second combustion chamber, gets rid of the dust impurity in the flue gas, has reduced the emission of smoke and dust and pollutant, and is friendly to the environment pollution-free. When the hot blast stove adopts the heat that biomass combustion produced to be used for the greenhouse heat transfer, heat exchange efficiency reaches more than 75%, and the thermal efficiency is high, and furnace body design structure is reasonable, can satisfy consumer's demand.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic sectional view of a hot blast stove provided by the present invention;

FIG. 2 is a schematic structural view of a first side of the hot blast stove provided by the present invention;

FIG. 3 is a schematic structural view of a second side of the hot blast stove provided by the present invention;

FIG. 4 is a schematic view of a combustion heat sink of the hot blast stove provided by the present invention;

fig. 5 is a schematic structural view of an air outlet pipe of the hot blast stove provided by the present invention;

FIG. 6 is a schematic structural view of a reinforced heat sink of a hot blast stove provided by the present invention;

FIG. 7 is a schematic structural view of a combustion-supporting gas inlet pipe connected to a combustion heat sink of the hot blast stove provided by the present invention;

fig. 8 is a schematic structural diagram of a fuel bin of the hot blast stove provided by the utility model.

Reference numerals:

1: a cover body; 2: a closed zone; 3: a housing;

4: a fuel bunker; 5: a first oven door; 6: a communication port;

7: a partition plate; 8: a second oven door; 9: a combustion heat sink;

10: a combustion-supporting gas inlet pipe; 11: reinforcing the heat sink; 12: a first chamber;

13: a flow guide pipe; 14: an air outlet pipe; 15: a dust door;

16: separating the net; 17: a heat exchange inlet; 18: a heat exchange outlet;

19: a smoke outlet; 20: a first heat sink; 21: a combustion-supporting gas inlet;

22: heat exchange holes; 23: a spiral flow deflector; 24: a second heat sink;

25: a first combustion chamber; 26: a second combustion chamber; 27: a heat exchange cavity;

28: a second chamber; 29: a flow channel; 30: and (4) screening holes.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model, combine fig. 1 to fig. 8 to show, provide a hot-blast furnace, include: casing 3, combustion system, heat exchange system and dust pelletizing system of discharging fume. The combustion system comprises a first combustion chamber 25 and a second combustion chamber 26 which are limited in the shell 3, the first combustion chamber 25 is communicated with the second combustion chamber 26, a fuel bin 4 which limits the fuel chambers is arranged in the first combustion chamber 25, and sieve holes 30 and a discharge hole which are communicated with the first combustion chamber 25 and the fuel chambers are formed in the wall surface of the fuel bin 4; the heat exchange system comprises a heat exchange chamber 27 defined inside the casing 3, the heat exchange chamber 27 being located at the periphery of at least one of the first combustion chamber 25 and the second combustion chamber 26; the smoke evacuation and dust removal system includes a smoke evacuation and dust removal chamber defined by the housing 3 and communicating with the second combustion chamber 26.

The combustion system, the heat exchange system and the smoke and dust removal system are all integrated in the shell 3 to form an integrated structure, which is beneficial to simplifying the structure of the hot blast stove.

Wherein, the combustion system comprises a first combustion chamber 25 and a second combustion chamber 26, that is, the fuel is subjected to two-stage combustion treatment in the combustion system, which helps the fuel to be fully combusted, and solves the problem of insufficient fuel combustion. The fuel bin 4 is arranged in the first combustion chamber 25, fuel is combusted for one time in the first combustion chamber 25, meanwhile, the fuel is fully contacted with air through the sieve holes 30, the combustion efficiency is improved, the combustion time is prolonged due to the sieve hole structure of the fuel bin 4, the packing frequency is reduced, and the manpower resource is saved; simultaneously, the in-process of burning is carried out once to fuel, and the heat that the burning produced can pass through sieve mesh 30 and transmit the fuel in the bunker 4, helps the fuel to preheat, and when the fuel moisture content is higher, still make the moisture gasification in the fuel, reduce the moisture content of fuel, guarantee combustion efficiency. The incompletely combusted fuel in the first combustion chamber 25 enters the second combustion chamber 26 to be combusted secondarily, so that the fuel is sufficiently combusted and heat is released.

In at least one process of primary combustion and secondary combustion, heat released by fuel exchanges heat with a heat exchange medium in a heat exchange cavity 27 of a heat exchange system, and the heat exchange medium absorbs heat and then is discharged out of the heat exchange cavity 27, so that the heat carried by the heat exchange medium is used for production and life. When the heat exchange medium is heated through the heat generated by the primary combustion and the secondary combustion, the heat generated by the secondary combustion is fully utilized, and the heat efficiency is higher.

The flue gas that the fuel burning produced discharges to the dust removal chamber of discharging fume through second combustion chamber 26, gets rid of the dust impurity in the flue gas, has reduced the emission of smoke and dust and pollutant, and is friendly to the environment pollution-free.

Wherein, the fuel stored in the fuel bin 4 is solid fuel, and under general conditions, the fuel is biomass fuel; the heat exchange medium of the heat exchange system can provide heat for the greenhouse, coal resources are saved, a method for solving the problems on the spot and changing waste into valuable is found for the utilization of the rural straw weigher, and energy-saving and environment-friendly benefits are achieved. The heat exchange medium is generally air, and cold air is converted into hot air through heat absorption in the heat exchange cavity 27 and then discharged into the greenhouse, so that a proper temperature environment is provided for the greenhouse.

In the hot blast stove of the embodiment, the combustion system, the heat exchange system and the smoke discharging and dust removing system are formed in the shell 3, the primary combustion efficiency of fuel in the first combustion cavity 25 is improved by the structure of the fuel bin 4 in the combustion system, and the second combustion cavity 26 is arranged for secondary combustion, so that the combustion sufficiency of the fuel is further improved; the heat exchange medium in the heat exchange cavity 27 of the heat exchange system is heated by at least one of the first combustion cavity 25 and the second combustion cavity 26, and the heat generated by combustion is fully utilized; the smoke discharging and dust removing system removes dust and impurities carried in smoke, and is environment-friendly and pollution-free.

In some embodiments, referring to fig. 1 and 4, a combustion heat sink 9 is disposed in the casing 3, the combustion heat sink 9 is provided with a combustion-supporting gas inlet 21 and a smoke exhaust port 19, the combustion heat sink 9 limits a second combustion chamber 26 communicating the combustion-supporting gas inlet 21 and the smoke exhaust port 19, the combustion-supporting gas inlet 21 is used for introducing combustion-supporting gas into the second combustion chamber 26, the smoke exhaust port 19 is communicated with the smoke exhaust and dust removal chamber, a heat exchange chamber 27 is limited between the outer side of the combustion heat sink 9 and the casing 3, and the casing 3 is provided with a heat exchange inlet 17 and a heat exchange outlet 18 communicated with the heat exchange chamber 27. The heat exchange medium enters the heat exchange cavity 27 through the heat exchange inlet 17, absorbs heat and is discharged from the heat exchange outlet 18.

The secondary combustion of the fuel is performed in the second combustion chamber 26 defined in the combustion heat sink 9, and the heat exchange medium absorbs heat in the heat exchange chamber 27 defined between the outer periphery of the combustion heat sink 9 and the housing 3, so that the heat generated by the combustion of the fuel in the hot blast stove is fully utilized.

The combustion-supporting gas inlet 21 is close to the communication port 6 between the first combustion chamber 25 and the second combustion chamber 26, and the combustion-supporting gas can be air or oxygen, and generally air is selected, so that the combustion cost is reduced.

It should be noted that the combustion heat sink 9 may be a component detachably connected to the housing 3, or may be a structure fixedly formed as a single body with the housing 3, and may be selected according to the requirement.

In some embodiments, the first combustion chamber 25 is located on at least one side of the heat exchange chamber 27, and the heat exchange medium in the heat exchange chamber 27 can also absorb heat of the first combustion chamber 25, so that heat of one-time combustion of the fuel in the first combustion chamber 25 can also be used for heating the heat exchange medium.

Referring to fig. 1, the first combustion chamber 25 and the second combustion chamber 26 are arranged in parallel in the horizontal direction, and one side of the heat exchange chamber 27 is located between the first combustion chamber 25 and the second combustion chamber 26, so that heat generated by one-time combustion can be absorbed by a heat exchange medium in the heat exchange chamber 27 conveniently, and the size of the hot blast stove can be reduced, so that the hot blast stove has the advantages of miniaturization and integration.

Of course, the first combustion chamber 25 is not limited to being horizontally juxtaposed with the second combustion chamber 26, and the first combustion chamber 25 may surround the second combustion chamber 26, or the first combustion chamber 25 may be vertically juxtaposed with the second combustion chamber 26.

In some embodiments, as shown with reference to fig. 1 and 4, the outer wall of the combustion heat sink 9 is provided with fins, increasing the heat dissipation area of the combustion heat sink 9, helping the heat exchange medium to absorb heat sufficiently in the heat exchange cavity 27.

The shape and position of the radiating fins can be adjusted as required, the heat exchange area is increased as much as possible, and the flowability of the heat exchange medium in the heat exchange cavity 27 is ensured.

In some embodiments, referring to fig. 4, the outer wall of the combustion heat sink 9 is provided with at least one of first and

second fins

20, 24; a heat exchange inlet 17 is formed in a first side of the shell 3, a heat exchange outlet 18 is formed in a second side of the shell 3, the first side and the second side are arranged oppositely, a first cooling fin 20 extends along the direction from the first side to the second side, and the first cooling fin 20 guides the heat exchange medium to flow from the first side to the second side; the heat exchange inlet 17 and the heat exchange outlet 18 are spaced apart in the height direction, the second fin 24 extends in the height direction, and the second fin 24 guides the flow of the heat exchange medium in the height direction.

When the outer wall of the combustion heat dissipation member 9 is connected with the first heat dissipation fin 20 and the second heat dissipation fin 24, it can be understood that the outer wall of the combustion heat dissipation member 9 is connected with heat dissipation fins extending in different directions, and the two heat dissipation fins guide the heat transfer medium in two directions, so that the heat transfer medium flows from the heat transfer inlet 17 to the heat transfer outlet 18, and the heat transfer efficiency of the heat transfer medium flowing process is also ensured.

Wherein, a fan can be arranged at the heat exchange inlet 17 or the heat exchange outlet 18 to promote the heat exchange medium to flow in the heat exchange cavity 27.

Referring to fig. 4, the first side and the second side may be understood as front and rear sides, and the first heat dissipation fins 20 are connected to left and right sides and upper and lower sides of the combustion heat dissipation member 9, that is, the first heat dissipation fins 20 are arranged in a transverse direction; the second fins 24 are attached to the first and second sides of the combustion heat sink 9, i.e. the second fins 24 are arranged vertically; the two direction extending fins have both heat dissipation and airflow guiding functions, which allows wind to enter the heat exchange cavity 27 from the heat exchange inlet 17 and to uniformly distribute and discharge airflow from the heat exchange outlet 18 under the action of the fins.

In some embodiments, referring to fig. 1 and 2, a first side of the casing 3 is provided with a heat exchange inlet 17, a second side of the casing 3 is provided with a heat exchange outlet 18, the first side is opposite to the second side, and the combustion heat sink 9 is provided with a heat exchange hole 22 penetrating along a direction from the first side to the second side, that is, the heat exchange medium on the first side can flow to the second side through the heat exchange hole 22, so that the heat exchange medium can be discharged from the heat exchange outlet 18.

Further, referring to fig. 1, 4 and 6, a reinforcing heat sink 11 is disposed in the heat exchange hole 22, and a ventilation gap is disposed between the reinforcing heat sink 11 and a wall surface of the heat exchange hole 22, so that a heat exchange medium on a first side flows to a second side through the ventilation gap, and the reinforcing heat sink 11 plays a role in reinforcing heat exchange in the heat exchange hole 22.

The heat exchange holes 22 are through holes from the first side to the second side, the shape of the reinforcing heat dissipation member 11 is matched with the heat exchange holes 22, the reinforcing heat dissipation member 11 is provided with a plurality of third cooling fins, the third cooling fins are located between the outer wall of the reinforcing heat dissipation member 11 and the wall surface of the heat exchange holes 22, and the third cooling fins increase the heat exchange area in the ventilation gap, namely, the heat exchange area of a heat exchange medium flowing through the ventilation gap is increased.

In some embodiments, referring to fig. 1, a partition net 16 is disposed in the second combustion chamber 26, the communication port 6 of the first combustion chamber 25 communicating with the second combustion chamber 26 is located below the partition net 16, and the oxidant gas inlet 21 is located below the partition net 16. The fuel that does not fully burn in first combustion chamber 25 passes through intercommunication mouth 6 and gets into second combustion chamber 26, and the fuel carries out the postcombustion in second combustion chamber 26, and the fuel postcombustion mainly carries out in separating net 16 below, separates net 16 and carries out prefilter with the large granule dust or the impurity that carry in the fuel or the burning produced to reduce the particulate matter that carries in the flue gas, help promoting the cleanliness of the flue gas that the hot-blast furnace discharged.

Referring to fig. 1, 4 and 7, the combustion-supporting gas inlet pipe 10 is connected to the bottom of the combustion heat sink 9, and the combustion-supporting gas inlet pipe 10 is limited to the combustion-supporting gas inlet 21. The combustion-supporting gas introduced into the second combustion chamber 26 from the combustion-supporting gas inlet pipe 10 can be supplied by a blower. The combustion-supporting gas inlet pipe 10 can be a square pipe or a round pipe.

In some embodiments, referring to fig. 1, a partition 7 is provided in the first combustion chamber 25, and the partition 7 filters the ashes generated in the first combustion chamber 25 so that the ashes can be discharged through the second door 8 at the bottom of the housing 3. A first oven door 5 is also connected to the housing 3, the first oven door 5 being used for ventilating the first combustion chamber 25.

Wherein, the ashes of the second combustion chamber 26 can also be discharged through the second furnace door 8 at the bottom of the casing 3, and the ashes of the two combustion chambers can be concentrated at the bottom of the casing 3, so that the ash treatment is more convenient.

In some embodiments, referring to fig. 1 to 3 and 5, the smoke evacuation and dust removal chamber includes a first chamber 12 and a second chamber 28 communicating with the first chamber 12, the first chamber 12 communicates with the second combustion chamber 26, an air outlet pipe 14 is disposed in the second chamber 28, a spiral deflector 23 is connected to an outer wall of the air outlet pipe 14, an inlet of the air outlet pipe 14 is located below the spiral deflector 23, and a communication position between the first chamber 12 and the second chamber 28 is located above the spiral deflector 23. The flue gas enters the upper area of the spiral deflector 23 in the second chamber 28 from the first chamber 12, so that the flue gas flows towards the inlet of the air outlet pipe 14 under the guiding action of the spiral deflector 23, so that the flue gas is discharged from the air outlet pipe 14. Wherein, the flue gas carries out cyclone under the effect of spiral guide vane 23, helps separating out the dust and the particulate matter that carry in the flue gas to promote the cleanliness of fume emission. At the same time, the flue gas flows between the first chamber 12 and the second chamber 28, increasing the flow path of the flue gas, and also assisting the flue gas to separate dust and particles by colliding with the walls of the housing 3 during the flow.

Wherein, spiral flow deflector 23 is spiral lamellar structure, and spiral flow deflector 23 distributes a plurality ofly in the circumference of air-out pipe 14 to make the flue gas carry out rotary motion in second cavity 28, make the dust or the particulate matter that have great inertial centrifugal force throw to the outer wall and separate.

When the combustion heat sink 9 is disposed in the housing 3, the first chamber 12 is communicated with the smoke outlet 19 of the combustion heat sink 9, and as shown in fig. 1, the smoke outlet 19 extends into the first chamber 12. The first chamber 12 and the second chamber 28 are arranged in parallel in the horizontal direction, so that dust or particulate matters in the flue gas are discharged through the air outlet pipe 14 after being subjected to cyclone separation in the second chamber 28.

In some embodiments, referring to fig. 1, a flow guiding tube 13 is further disposed inside the second chamber 28 and sleeved outside the spiral flow guiding plate 23, a flow passage 29 is defined between the air outlet tube 14 and the flow guiding tube 13, and the second chamber 28 is communicated with an inlet of the air outlet tube 14 through the flow passage 29. That is, the flue gas in the second chamber 28 flows along the flow channel 29 towards the inlet of the outlet duct 14. The flue gas in the second chamber 28 is guided by the flow guide pipe 13 to ensure that the flue gas smoothly flows to the inlet of the air outlet pipe 14.

Wherein, the top of spiral water conservancy diversion piece 23 is located to the upper end cover of honeycomb duct 13, and the lower extreme of honeycomb duct 13 is less than the import of tuber pipe 14, and the lower extreme of honeycomb duct 13 is equipped with the through-hole to the dust and the particulate matter of separating discharge honeycomb duct 13. The shell 3 is also connected with an ash door 15, the ash door 15 is positioned below the guide pipe 13, an ash accumulation area is formed below the guide pipe 13, and dust and particles in the ash accumulation area are discharged through the ash door 15.

In some embodiments, referring to fig. 1 and 8, the fuel bin 4 comprises a cylindrical section and a conical section located at the lower end of the cylindrical section, the bottom of the conical section is contracted to form the discharge hole, and a plurality of sieve holes 30 are uniformly distributed in the height direction of the cylindrical section and the conical section. The discharge port is located at the bottom of the fuel bin 4, so that fuel and ash can automatically fall into the first combustion chamber 25 through gravity, and the energy consumption required by fuel delivery is low. The discharge gate is located the bottom of toper section, and the toper section is the back taper structure, and that is the bunker 4 closes up through the toper section, plays the effect of adjusting the fuel volume that gets into first combustion chamber 25 promptly. The sieve holes 30 are uniformly distributed, which is helpful for the fuel in the fuel bin 4 to fully contact the combustion-supporting gas and fully preheat.

The sieve holes 30 may be circular holes or long holes, and the specific shape and size may be selected according to the form of the fuel. The fuel bin 4 is distributed with sieve pores 30 all over, so that the straws to be incinerated can be fully contacted with air for combustion, and the lower end of the fuel bin is provided with a funnel-shaped opening surrounded by strip-shaped holes, so that the incinerated dust or doped materials can fall down conveniently.

In some embodiments, referring to fig. 1 to 3, the fuel tank 4 is covered with a cover 1, and the cover 1 is connected to the housing 3 in a sealing manner. The cover body 1 plays a role in sealing the fuel bin 4, so that flame generated by fuel combustion is prevented from jumping out of the shell body 3, and a safety protection effect is achieved.

The cover body 1 is matched with a closed area 2 on the shell 3 for sealing, wherein the closed area 2 is filled with fine sand.

In some embodiments, referring to fig. 1 to 3, the first combustion chamber 25 is horizontally juxtaposed with the second combustion chamber 26, the outer side of the second combustion chamber 26 surrounds the heat exchange chamber 27, and the smoke evacuation and dust removal chamber is located above the second combustion chamber 26. The heat generated by fuel combustion is fully utilized by combining the flowing characteristic of the flue gas and the flowing characteristic of the heat exchange medium, and the heat exchange efficiency of the heat exchange medium is improved.

Referring to fig. 1 to 8, the hot blast stove of the above embodiment is described as being used for biomass combustion, the housing 3 defines a first combustion chamber 25 and a second combustion chamber 26, a fuel bin 4 is disposed in the first combustion chamber 25, straw to be burned is placed in the fuel bin 4, a small amount of unburnt substances are fully combusted with air in the first combustion chamber 25, the small amount of unburnt substances enter the second combustion chamber 26 through a communication port 6 communicating the first combustion chamber 25 with the second combustion chamber 26, the second combustion chamber 26 is contacted with air and carries out secondary combustion at a position close to the communication port 6, a layer of fine and dense partition net 16 is disposed in the second combustion chamber 26, large particulate substances are filtered by the partition net 16, smoke dust flows in the second combustion chamber 26 and is radiated to the heat exchange chamber 27 through the second combustion chamber 26, the smoke gas enters the smoke discharging and dust removing chamber through the second combustion chamber 26, and impurities in the smoke discharging and dust removing chamber are separated by a spiral structure, the smoke dust is precipitated and the smoke is discharged.

The hot-blast furnace of this embodiment adopts the heat that biomass combustion produced to be used for the greenhouse heat transfer, and fuel bunker 4 has all over to distribute has sieve mesh 30 for the straw that will burn is abundant can fully burn with the air contact, has improved combustion efficiency, and fuel bunker 4 has prolonged combustion time, reduces the filler number of times, practices thrift manpower resources. Meanwhile, the combustion heat dissipation part 9 is adopted to enable large straw particles and the like entering the second combustion cavity 26 through the communication port 6 to form secondary combustion, so that biomass particles can be fully combusted, the sustainable development requirements of energy conservation and environmental protection are met, the emission of smoke and pollutants is reduced by the smoke discharging and dust removing system, and the environment-friendly and pollution-free effects are achieved; the heat exchange area and the heat exchange efficiency are increased by the flow guide heat exchange technology of the vertical radiating fins and the horizontal radiating fins of the combustion radiating piece 9. The hot blast stove has the advantages of compact integral structure, small occupied area, high heat efficiency, environmental protection, energy conservation and cost saving, and reduces heat loss by adopting integral heat preservation. The biomass hot blast stove is tested to test the thermal performance, and the heat exchange quantity is (6 multiplied by 10)⁵～8×10⁵) kJ/h, the heat exchange efficiency reaches more than 75%, the heat efficiency is high, the furnace body design structure is reasonable, and the requirements of consumers can be met.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A hot blast stove, comprising:

a housing;

2. The hot blast stove according to claim 1, wherein a combustion heat sink is provided in the housing, the combustion heat sink is provided with a combustion-supporting gas inlet and a smoke exhaust port, the combustion heat sink defines the second combustion chamber communicating the combustion-supporting gas inlet and the smoke exhaust port, the smoke exhaust port is communicated with the smoke exhaust and dust removal chamber, the heat exchange chamber is defined between the outer side of the combustion heat sink and the housing, the housing is provided with a heat exchange inlet and a heat exchange outlet communicating with the heat exchange chamber, and the first combustion chamber is located on at least one side surface of the heat exchange chamber.

3. The hot blast stove according to claim 2, wherein the outer wall of the combustion heat sink is provided with at least one of first and second fins;

4. The hot blast stove according to claim 2, wherein the first side of the housing is provided with the heat exchange inlet, the second side of the housing is provided with the heat exchange outlet, the first side and the second side are arranged opposite to each other, the combustion heat dissipation member is provided with a heat exchange hole which is through along the direction from the first side to the second side, a reinforcing heat dissipation member is arranged in the heat exchange hole, and a ventilation gap is arranged between the reinforcing heat dissipation member and the wall surface of the heat exchange hole.

5. The hot blast stove according to claim 2, wherein a screen is provided in the second combustion chamber, a communication port through which the first combustion chamber communicates with the second combustion chamber is located below the screen, and the combustion-supporting gas inlet is located below the screen.

6. The hot blast stove according to claim 1, wherein the smoke exhausting and dust removing cavity comprises a first cavity and a second cavity, the first cavity is communicated with the second combustion cavity, an air outlet pipe is arranged in the second cavity, a spiral deflector is connected to the outer wall of the air outlet pipe, an inlet of the air outlet pipe is located below the spiral deflector, and a communication position of the second cavity and the first cavity is located above the spiral deflector.

7. The hot blast stove according to claim 6, wherein a flow guide pipe is further disposed in the second chamber and sleeved outside the spiral flow deflector, a flow passage is limited between the air outlet pipe and the flow guide pipe, and the second chamber is communicated with an inlet of the air outlet pipe through the flow passage.

8. The hot blast stove according to claim 1, wherein the fuel bin comprises a cylindrical section and a conical section located at the lower end of the cylindrical section, the bottom of the conical section is contracted to form a discharge hole, and a plurality of the sieve holes are uniformly distributed in the height direction of the cylindrical section and the conical section.

9. The hot blast stove according to claim 1, wherein the fuel bin is provided with a cover, the cover being in closed connection with the housing.

10. The hot blast stove according to any one of claims 1 to 9, wherein the first combustion chamber is horizontally juxtaposed with the second combustion chamber, the outer side of the second combustion chamber surrounds the heat exchange chamber, and the smoke evacuation dust removal chamber is located above the second combustion chamber.