CN207716825U - A kind of dry-heat air furnace apparatus - Google Patents

Abstract

The utility model discloses a dry hot blast stove equipment, which comprises: a fuel tower, which is arranged at one end of the hot blast stove, and a discharge port is arranged at the bottom inside; a combustion furnace, which is connected with the fuel tower through a feeding pipe, and the The combustion furnace is provided with a plurality of air inlets arranged vertically and spirally in a staggered manner, which communicate with the combustion-supporting fan arranged at the bottom of the combustion furnace; Low-temperature side smoke guide pipe; wherein, the upper port of the high-temperature side smoke guide pipe is connected to the top outlet of the combustion furnace through a high-temperature smoke exhaust pipe, and the upper port of the low-temperature side smoke guide pipe is connected to a dust collector through a low-temperature smoke exhaust pipe The cold air inlet is arranged on the upper part of the heat exchanger, and the outside of the low-temperature exhaust pipe can introduce cold air to exchange heat from the low-temperature flue gas. The air inlets of the combustion furnace are vertically and spirally staggered, which helps the fuel to burn fully in the combustion furnace and improves resource utilization.

Description

A dry hot blast furnace equipment

technical field

The utility model relates to a dry hot blast stove equipment, which belongs to the technical field of hot blast stoves.

Background technique

The hot air stove is one of the important hot air source equipment in today's industrial and agricultural production. Whether industrial heating or dry grain production processes require clean, low-cost sources of hot air.

With the depletion of traditional fossil energy (coal, oil, etc.) and the increasing environmental pollution faced by human beings, all countries in the world are actively seeking to develop renewable energy. my country is a large agricultural country, and there is a large amount of renewable biomass energy every year. If these renewable biomass fuels can be used well, limited natural resources can be effectively protected and environmental pollution can be reduced.

At present, there are many types of hot blast stoves, with different fuels, heat transfer forms, and furnace body structures. However, on the existing hot blast stove equipment, the cold air passes through the high and low temperature section, the low and high temperature section, the low and medium temperature section, the high and medium temperature section, and the high and high temperature section of the hot flue gas respectively, and finally flows out through the low and low section. During the exchange period, the corresponding temperature gradient fluctuates too much, and the heat exchange method is unscientific.

At the same time, the structure of the furnace body and the arrangement of the air inlet and the feed port in the existing dry hot blast stove equipment are unreasonable, resulting in insufficient combustion; the scattered heat from the outer wall of the combustion furnace is not well utilized; Unscientific, low thermal efficiency.

Utility model content

The utility model designs and develops a drying hot blast stove equipment, which can overcome the problems of insufficient combustion, large relative temperature gradient fluctuations and low efficiency during the heat exchange period of the existing hot blast stove.

The technical scheme provided by the utility model is:

A dry hot blast furnace equipment, comprising:

The fuel tower is arranged at one end of the hot blast stove equipment, and a discharge port is arranged at the bottom of the interior;

The combustion furnace is connected to the fuel tower through a feed pipe, and the combustion furnace is provided with a plurality of air inlets arranged longitudinally and spirally staggered, which communicate with the combustion-supporting fan arranged at the bottom of the combustion furnace;

A heat exchanger, which is arranged on one side of the combustion furnace, includes a high-temperature side smoke guide pipe and a low-temperature side smoke guide pipe; wherein, the upper port of the high-temperature side smoke guide pipe passes through the high-temperature smoke exhaust pipe and the top of the combustion furnace The outlet is connected, and the upper port of the low-temperature side smoke pipe is connected to the dust collector through the low-temperature smoke exhaust pipe;

The cold air inlet is arranged on the upper part of the heat exchanger, and the outside of the low-temperature exhaust pipe can introduce cold air to exchange heat from the low-temperature flue gas.

Preferably, the discharge port is connected to one end of the delivery pipe through a pneumatic conveying device.

Preferably, the other end of the feed pipe is connected to the feed inlet of the combustion furnace, and the feed inlet is located lower than the highest air inlet to ensure sufficient combustion of the fuel.

Preferably, the two ends of the high-temperature side smoke guide pipe and the low-temperature side smoke guide pipe are respectively fixed with an upper fixing plate and a lower fixing plate, and a partition is provided between the two groups of smoke pipes.

Preferably, the heat exchange of the low-temperature flue gas passes through the heat exchange channel, including: the upper fixing plate, the lower fixing plate, the partition plate and four sets of arc guides arranged outside the two sets of smoke pipes plate.

Preferably, the combustion furnace and the heat exchanger are arranged inside the casing of the hot blast stove equipment.

Preferably, the top of the casing of the hot blast stove equipment is provided with a plurality of ventilation openings.

Preferably, the air inlet is horizontally tangent to the furnace wall of the combustion furnace.

Preferably, a dust collection chamber is provided below the heat exchanger.

Preferably, the ash collection chamber includes: the lower fixing plate, a flue gas deflector located below the lower fixing plate, and a shell of the hot blast stove equipment.

The beneficial effects described in the utility model: the air inlets of the combustion furnace are vertically and spirally staggered, which helps the fuel to be fully burned in the combustion furnace and improves the utilization rate of resources; the combustion-supporting fan is arranged outside the combustion furnace and inside the equipment shell, On the one hand, the temperature of the outer wall of the combustion furnace is reduced, and on the other hand, the heat scattered by the outer wall of the combustion furnace is utilized.

Two sets of smoke pipes, baffles and casings form a flow channel for cold air. Cold air enters the flow channel from the side of the low-temperature side of the heat exchanger, and hot air flows out from the side of the high-temperature side of the smoke tube. The flow direction is the same as that of the flue gas. The flow direction is opposite, which improves the heat exchange efficiency; the ash collection chamber is located directly under the two sets of smoke pipes, which is convenient for cleaning; the flue gas is equipped with a dust collector at the end to effectively reduce environmental pollution.

The equipment layout of the hot blast stove is reasonable, easy to realize automation, fuel combustion is sufficient, the heat exchange method of the heat exchanger is scientific, the heat exchange efficiency is high, the dust collector is added, and the environmental pollution is small.

Description of drawings

Fig. 1 is a schematic structural view of the dry hot stove equipment described in the present invention.

Fig. 2 is a top view of the dry hot blast stove described in the utility model.

Fig. 3 is a schematic structural view of the combustion furnace described in the present invention.

Fig. 4 is a top view of the combustion furnace described in the utility model.

Fig. 5 is a structural schematic diagram of the heat exchanger described in the present invention.

Fig. 6 is a top view of the heat exchanger described in the present invention.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it by referring to the description.

As shown in Figures 1-6, the utility model provides a dry hot stove equipment, including: a fuel tower 1, a combustion furnace 2, a heat exchanger 4 and a dust collector 7.

The fuel tower 1 is arranged at one end of the hot blast stove equipment, and a discharge port 11 is provided at the bottom of the interior, and the pneumatic conveying device 12 is provided below the discharge port 11 and is located at the bottom of the fuel tower 1; one end of the feed pipe 13 is connected to the pneumatic conveying device 12 The other end is connected to the feed port 21 of the combustion furnace 2, and the discharge port 11 transports the material to the combustion furnace 2 through the pneumatic conveying device 12.

The first combustion-supporting blower 225 and the second combustion-supporting blower 226 are arranged on both sides outside the combustion furnace, and are located inside the shell of the hot blast stove equipment. The combustion furnace 2 is provided with a plurality of vertically spirally staggered air inlets, including a first air inlet 221, a second air inlet 222, a third air inlet 223, and a fourth air inlet 224, wherein the first air inlet 221 and the second air inlet Three air inlets 223 are communicated with the first combustion-supporting fan 225, and the second air inlet 222 and the fourth air inlet 224 are communicated with the second combustion-supporting fan 225. A stable suspended airflow is formed inside. 221 is the highest air inlet, and the position of 221 is higher than the feed inlet 21 to ensure the full combustion of the fuel. The flue gas after combustion enters the high-temperature exhaust pipe 3 through the top outlet 23 of the combustion furnace, and the burned ashes pass through the ash cleaning device 24 discharge.

The heat exchanger 4 is arranged on one side of the combustion furnace, and is co-located with the combustion furnace 2 inside the shell of the hot blast stove equipment, and the equipment shell above the top of the combustion furnace 2 has a plurality of vents. The heat exchanger 4 includes two sets of upright smoke guide pipes, namely the high-temperature side smoke guide pipe 41 and the low-temperature side smoke guide pipe 44. The upper port 411 of the high-temperature side smoke guide pipe 41 passes through the high-temperature smoke exhaust pipe 3 and the top outlet of the combustion furnace. 23 connection; the upper port 441 of the low-temperature side smoke guide pipe is connected to the dust collector 7 through the low-temperature smoke exhaust pipe 6, and the two ends of the two sets of smoke pipes of the heat exchanger are respectively fixed on the upper fixing plate 43 and the lower fixing plate 47. A partition 42 is arranged in the middle of the smoke pipe.

The ash collection chamber 45 is arranged below the heat exchanger 4, and the ash collection chamber 45 includes a lower fixing plate 47, a flue gas deflector 451 arranged below the lower fixing plate, and an equipment casing 5, and the three together form a closed chamber. The ash-collecting chamber 45 is provided with a soot-cleaning port 46 through which the ash-collecting chamber 45 is cleaned regularly.

The high-temperature flue gas discharged from the combustion furnace 2 flows through the high-temperature smoke exhaust pipe 3, the high-temperature side smoke guide pipe 41, the ash collection chamber 45, the low-temperature side smoke guide pipe 44 and the low-temperature smoke exhaust pipe 6, forming a "U"-shaped channel , and finally discharged into the atmosphere after being treated by the dust collector 7.

The upper fixed plate 43, the lower fixed plate 47, the partition 42, four groups of arc deflectors 49 and the equipment casing 5 form the flow channel of the cold air, and the cold air flows from the cold air inlet 8 on the top of the low-temperature side smoke guide pipe 44. It goes in and flows out from the hot air outlet 48 on the upper part of the high-temperature side smoke guide pipe 41 along the partition plate 42 set inside the heat exchanger. The cold air starts to exchange heat from the low-temperature flue gas, and gradually conducts heat exchange against the flow path of the flue gas to improve the heat exchange efficiency.

Although the embodiment of the present utility model has been disclosed as above, it is not limited to the use listed in the description and the implementation, and it can be applied to various fields suitable for the present utility model. For those familiar with the art, Further modifications can be readily effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. A dry hot blast furnace equipment, characterized in that, comprising: The fuel tower is arranged at one end of the hot blast stove equipment, and a discharge port is arranged at the bottom of the interior; The combustion furnace is connected to the fuel tower through a feed pipe, and the combustion furnace is provided with a plurality of air inlets arranged longitudinally and spirally staggered, which communicate with the combustion-supporting fan arranged at the bottom of the combustion furnace; A heat exchanger, which is arranged on one side of the combustion furnace, includes a high-temperature side smoke guide pipe and a low-temperature side smoke guide pipe; wherein, the upper port of the high-temperature side smoke guide pipe passes through the high-temperature smoke exhaust pipe and the top of the combustion furnace The outlet is connected, and the upper port of the low-temperature side smoke pipe is connected to the dust collector through the low-temperature smoke exhaust pipe; The cold air inlet is arranged on the upper part of the heat exchanger, and the outside of the low-temperature exhaust pipe can introduce cold air to exchange heat from the low-temperature flue gas. 2. The dry hot blast stove equipment according to claim 1, characterized in that, the discharge port is connected to one end of the delivery pipe through a pneumatic conveying device. 3. The dry hot blast stove equipment according to claim 2, characterized in that, the other end of the feed pipe is connected to the feed port of the combustion furnace, and the position of the feed port is lower than the highest The air inlet ensures the full combustion of fuel. 4. The drying hot blast stove equipment according to claim 1, characterized in that, the two ends of the high-temperature side smoke guide pipe and the low-temperature side smoke guide pipe are respectively fixed with an upper fixing plate and a lower fixing plate, and two sets of smoke A partition is provided in the middle of the tube. 5. The dry hot blast stove equipment according to claim 4, wherein the heat exchange of the low-temperature flue gas passes through a heat exchange channel, comprising: the upper fixing plate, the lower fixing plate, the partition and Four sets of curved deflectors are arranged outside the two sets of smoke pipes. 6. The drying hot blast stove equipment according to claim 2, characterized in that, the combustion furnace and the heat exchanger are arranged inside the shell of the hot blast stove equipment. 7. The dry hot stove equipment according to claim 6, characterized in that, the top of the shell of the hot blast stove equipment is provided with a plurality of ventilation openings. 8. The dry hot blast stove equipment according to claim 1, characterized in that, the air inlet is horizontally tangent to the furnace wall of the combustion furnace. 9. The dry hot blast stove equipment according to claim 4, characterized in that a dust collection chamber is arranged below the heat exchanger. 10. The drying hot blast stove equipment according to claim 9, characterized in that, the ash collection chamber comprises: the lower fixing plate, the flue gas deflector positioned below the lower fixing plate and the shell of the hot blast stove equipment body.