Multi-fuel hot blast stove

Abstract

The utility model discloses a multi-fuel hot blast stove, and relates to the technical field of hot blast stoves. The energy-saving furnace comprises a furnace body, a combustion chamber is arranged in the furnace body, the top end of the combustion chamber is communicated with an exhaust heat exchange pipe, the exhaust heat exchange pipe extends out of the top face of the furnace body, the side, away from the combustion chamber, of the furnace body is communicated with an air inlet pipe, and the portion, located over the combustion chamber, of the furnace body is communicated with an air outlet pipe. The side wall of the combustion chamber is communicated with a smashing and feeding box through a feeding pipe, an ignition device is arranged at the bottom in the combustion chamber, and a slag discharging opening with a movable baffle is formed in the bottom of the combustion chamber. The problem that according to an existing multi-fuel hot blast stove, due to the fact that fuel shapes are uneven, a large amount of fuel is wasted is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stoves, in particular to a multi-fuel hot blast stove. Background Art

[0002] Hot blast furnace is a thermal power machine. It began to be widely used in my country in the late 1970s. It has become a replacement product for electric heat source and traditional steam power heat source in many industries. There are many varieties and series of hot blast furnaces. They are divided into manual burning and machine burning according to the coal adding method, and divided into coal, oil, gas furnaces, etc. according to the type of fuel.

[0003] Multi-fuel hot blast stoves are being used more and more. However, the morphology of the fuel in multi-fuel hot blast stoves is uneven, which results in a great difference in the speed of ash formation after the fuel is added to the combustion chamber. The material that forms ash slowly is greatly affected after being covered by a large amount of ash, which seriously affects the normal use of the hot blast stove and causes a lot of fuel waste. Utility Model Content

[0004] The utility model aims to provide a multi-fuel hot blast stove to solve the problem of a large amount of fuel waste in the existing multi-fuel hot blast stove due to uneven fuel morphology.

[0005] In order to solve the above problems, the utility model adopts the following technical means:

[0006] A multi-fuel hot blast furnace comprises a furnace body, a combustion chamber is arranged in the furnace body, the top of the combustion chamber is connected to an exhaust heat exchange pipe, the exhaust heat exchange pipe extends from the top surface of the furnace body, the side of the furnace body away from the combustion chamber is connected to an air inlet pipe, the furnace body is located directly above the combustion chamber and is connected to an air outlet pipe, the side wall of the combustion chamber is connected to a crushing feeding box through a feeding pipe, an ignition device is arranged at the inner bottom of the combustion chamber, and a slag discharge port with a movable baffle is arranged at the bottom of the combustion chamber.

[0007] Preferably, the furnace body is divided into a first heating chamber and a second heating chamber by a vertical partition, the combustion chamber is arranged in the second heating chamber, the air outlet pipe is connected with the second heating chamber, a plurality of air holes are distributed on the partition, the exhaust heat exchange pipe includes a first exhaust pipe connected with the combustion chamber and arranged in the second heating chamber, the first exhaust pipe is connected with the second exhaust pipe through the vertical partition, the second exhaust pipe is arranged in an S shape, and the second exhaust pipe extends from the top of the furnace body on one side away from the combustion chamber.

[0008] Furthermore, an ash collecting hopper is provided on the top surface of the furnace body, and the slag discharge port is provided in the ash collecting hopper.

[0009] Furthermore, the crushing and feeding box includes a material box, a rotating motor is installed on the top surface of the material box, the rotating section of the rotating motor extends into the material box and is installed with a crushing paddle, the top surface of the material box is connected to a feeding channel, the bottom surface of the material box is connected to the feeding pipe, and a unloading valve is provided in the unloading port connecting the material box and the feeding pipe.

[0010] Furthermore, the portion of the feeding pipe extending out of the furnace body is also connected to a blast pipe, and the blast pipe is connected to a blast fan.

[0011] During use, the utility model has the following beneficial effects:

[0012] The aforementioned furnace body serves as a place where hot air is generated. The mixed material enters the combustion chamber through a crushing and feeding box. The mixed material is crushed as much as possible in the crushing and feeding box to form particles of uniform size, which enter the combustion chamber for combustion to generate heat. In addition, a large amount of crushed material is used for combustion, which can effectively increase the contact area between the material and oxygen, so that the material burns more fully and the heat utilization rate is higher. Moreover, different types of raw materials can form ash in a similar time, and some materials will not be covered by a large amount of ash due to incomplete combustion, which will affect the normal combustion of the material. And the ash produced after combustion in the combustion chamber can be carried out from the slag discharge port. Cold air enters the furnace body from the air inlet pipe, heats up after contacting the exhaust heat exchange pipe and the outer wall of the combustion chamber, and then is discharged from the air outlet pipe as hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the crushing and feeding box of the utility model.

[0015] Among them, 1-furnace body, 2-combustion chamber, 3-exhaust heat exchange pipe, 31-first exhaust pipe, 32-second exhaust pipe, 4-air inlet pipe, 5-air outlet pipe, 6-crushing feeding box, 61-material box, 62-rotating motor, 63-crushing paddle, 7-feeding pipe, 8-slag discharge port, 9-ignition device, 10-vertical partition, 11-first heating chamber, 12-second heating chamber, 13-air hole, 14-ash collection bucket, 15-blast pipe. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Please refer to Figure 1 and Figure 2 As shown, a multi-fuel hot blast furnace comprises a furnace body 1, wherein a combustion chamber 2 is arranged in the furnace body 1, the top of the combustion chamber 2 is connected to an exhaust heat exchange pipe 3, the exhaust heat exchange pipe 3 extends from the top surface of the furnace body 1, the side of the furnace body 1 away from the combustion chamber 2 is connected to an air inlet pipe 4, the furnace body 1 is located directly above the combustion chamber 2 and is connected to an air outlet pipe 5, the side wall of the combustion chamber 2 is connected to a crushing feeding box 6 through a feeding pipe 7, an ignition device 9 is arranged at the bottom of the combustion chamber 2, and a slag discharge port 8 with a movable baffle is arranged at the bottom of the combustion chamber 2.

[0023] In this way, the aforementioned furnace body 1 is used as a place for hot air generation, and the mixed material enters the combustion chamber 2 through the crushing and feeding box 6. The mixed material is crushed as much as possible in the crushing and feeding box 6 to form particles of uniform size, and enters the combustion chamber 2 for combustion to generate heat. In addition, a large amount of crushed materials are used for combustion, which can effectively increase the contact area between the material and oxygen, and the material burns more fully and the heat utilization rate is higher. Moreover, different types of raw materials can form ash in a similar time, and some materials will not be covered by a large amount of ash due to incomplete combustion, which will affect the normal combustion of the materials. And the ash generated after combustion in the combustion chamber 2 can be taken out from the slag discharge port. Cold air enters the furnace body 1 from the air inlet pipe 4, heats up after contacting the exhaust heat exchange pipe 3 and the outer wall of the combustion chamber 2, and then is discharged from the air outlet pipe 5 as hot air.

[0024] Furthermore, the furnace body 1 is divided into a first heating chamber 11 and a second heating chamber 12 by a vertical partition 10, the combustion chamber 2 is arranged in the second heating chamber 12, the air outlet pipe 5 is connected to the second heating chamber 12, and a plurality of air holes 13 are distributed on the partition. The exhaust heat exchange pipe 3 includes a first exhaust pipe 31 connected to the combustion chamber 2 and arranged in the second heating chamber 12, the first exhaust pipe 31 passes through the vertical partition 10 and is connected to the second exhaust pipe 32, the second exhaust pipe 32 is arranged in an S shape, and the second exhaust pipe 32 extends from the top of the furnace body 1 on one side away from the combustion chamber 2.

[0025] In this way, the partition is used to reduce the flow speed of the cold air after entering the furnace body 1. The wind can pass through the air holes 13 on the partition, and the cold air first enters the first heating chamber 11. Due to the equipment of the partition, the cold air can be sufficiently heated by the second exhaust pipe 32 in the first heating chamber 11, and then the heated wind passes through the air holes 13 and contacts with the first exhaust pipe 31 and the outer wall of the combustion chamber 2 for heating, and finally forms hot air and is discharged from the air outlet. In this way, the contact time between the wind and the exhaust heat exchange pipe 3 is increased by reducing the flow speed of the wind in the furnace body 1, thereby improving the thermal efficiency.

[0026] Furthermore, an ash collecting hopper 14 is provided on the top surface of the furnace body 1 , and the slag discharge port 8 is provided in the ash collecting hopper 14 .

[0027] Furthermore, the crushing and feeding box 6 includes a material box 61, a rotating motor 62 is installed on the top surface of the material box 61, the rotating section of the rotating motor 62 extends into the material box 61 and is installed with a crushing paddle 63, the top surface of the material box 61 is connected to a feeding channel, the bottom surface of the material box 61 is connected to the feeding pipe 7, and a discharge valve is provided in the discharge port of the material box 61 connected to the feeding pipe 7.

[0028] In addition, the portion of the feeding pipe 7 extending out of the furnace body 1 is also connected to a blast pipe 15, and the blast pipe 15 is connected to a blast fan.

[0029] Due to long-term use, a large amount of ash will also accumulate in the exhaust heat exchange tube 3. After a period of use, the slag discharge port 8 is closed, and the blower is continuously used to blow air into the combustion chamber 2, and then the ash accumulated in the exhaust heat exchange tube 3 is blown out from the air outlet end of the exhaust heat exchange tube 3 by a strong wind flow, thereby achieving the cleaning of the exhaust heat exchange tube 3.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-fuel hot air stove, characterized in that: The invention comprises a furnace body (1), wherein a combustion chamber (2) is provided in the furnace body (1), the top of the combustion chamber (2) is connected to an exhaust heat exchange pipe (3), the exhaust heat exchange pipe (3) extends from the top surface of the furnace body (1), the side of the furnace body (1) away from the combustion chamber (2) is connected to an air inlet pipe (4), the furnace body (1) is located directly above the combustion chamber (2) and is connected to an air outlet pipe (5), the side wall of the combustion chamber (2) is connected to a crushing feeding box (6) via a feeding pipe (7), an ignition device (9) is provided at the bottom of the combustion chamber (2), and a slag discharge port (8) with a movable baffle is provided at the bottom of the combustion chamber (2).

2. A multi-fuel hot blast stove according to claim 1, characterized in that: The furnace body (1) is divided into a first heating chamber (11) and a second heating chamber (12) by a vertical partition (10); the combustion chamber (2) is arranged in the second heating chamber (12); the air outlet pipe (5) is connected to the second heating chamber (12); a plurality of air holes (13) are distributed on the vertical partition (10); the exhaust heat exchange pipe (3) comprises a first exhaust pipe (31) connected to the combustion chamber (2) and arranged in the second heating chamber (12); the first exhaust pipe (31) passes through the vertical partition (10) and is connected to a second exhaust pipe (32); the second exhaust pipe (32) is arranged in an S shape; the second exhaust pipe (32) extends from the top of a side of the furnace body (1) away from the combustion chamber (2).

3. A multi-fuel hot air stove according to claim 1, characterized in that: An ash collecting hopper (14) is provided on the top surface of the furnace body (1), and the slag discharge port (8) is provided in the ash collecting hopper (14).

4. A multi-fuel hot air stove according to claim 1, characterized in that: The crushing and feeding box (6) comprises a material box (61), a rotating motor (62) is installed on the top surface of the material box (61), a rotating section of the rotating motor (62) extends into the material box (61) and is installed with a crushing paddle (63), the top surface of the material box (61) is connected to a feeding channel, the bottom surface of the material box (61) is connected to the feeding pipe (7), and a discharge stop valve is provided in the discharge port of the material box (61) connected to the feeding pipe (7).

5. A multi-fuel hot blast stove according to claim 1, characterized in that: The portion of the feeding pipe (7) extending out of the furnace body (1) is also connected to a blast pipe (15), and the blast pipe (15) is connected to a blast fan.

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