Efficient hot blast stove

Abstract

The efficient hot blast stove is applied to the field of hot blast stoves and comprises a stove body, a heating device is arranged in the stove body and comprises a mounting frame arranged in the stove body, an air inlet pipe is arranged on the mounting frame, the air outlet end of the air inlet pipe communicates with a connecting box, and the connecting box communicates with a first air outlet pipe and a first heating pipe; a backflow pipe is arranged at the end, away from the connecting box, of the first heating pipe, a second heating pipe is arranged at the end, away from the first heating pipe, of the backflow pipe, and the second heating pipe communicates with the connecting box. The heating device has the technical effects that hot air sequentially passes through the first heating pipe, the backflow pipe and the second heating pipe and then is exhausted through the first air outlet pipe, the route of the hot air in the heating device is a bent loop, and therefore the contact area of cold air in the furnace body and the heating device is increased, and the cold air heat exchange speed and the cold air heating efficiency are improved; after being heated to the required temperature, the cold air is discharged out of the furnace body through the output pipe for subsequent production.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hot blast stoves, in particular to a high-efficiency hot blast stove. BACKGROUND

[0002] The hot blast stove is a heat-powered machine, which heats cold air through a specific way and delivers the heated air to a required space or process.

[0003] During the use of the hot blast stove, cold air required to be heated is introduced into the furnace body through the inlet pipe, the furnace body is provided with single-layer straight-tube heating pipes, hot gas generated by burning fuel enters the furnace body through the inlet pipe, and then the hot gas is guided to pass through the heating pipes, so that the temperature of the heating pipes is increased, and the cold air is heated through heat exchange during the process of passing through the heating pipes, and then the cold air is discharged from the furnace body through the outlet pipe.

[0004] During the use of the hot blast stove, the single-layer straight-tube heating pipes are arranged, the heating path of the hot gas during the process of passing through the heating pipes is only a single straight line, the contact area between the cold air and the heating pipes is small, the heat exchange speed is slow, and the heating efficiency of the cold air is low. SUMMARY

[0005] In order to solve the problems of the related art hot blast stove, the single-layer straight-tube heating pipes are arranged, the heating path of the hot gas during the process of passing through the heating pipes is only a single straight line, the contact area between the cold air and the heating pipes is small, the heat exchange speed is slow, and the heating efficiency of the cold air is low, the application provides a high-efficiency hot blast stove, which adopts the following technical scheme: a furnace body is arranged, a heating device is arranged in the furnace body, the heating device comprises a mounting frame arranged in the furnace body, an inlet pipe is arranged on the mounting frame, the outlet end of the inlet pipe is connected with a connecting box, a first outlet pipe and a first heating pipe are connected with the connecting box, a reflux pipe is arranged at the end of the first heating pipe away from the connecting box, a second heating pipe is arranged at the end of the reflux pipe away from the first heating pipe, and the second heating pipe is connected with the connecting box.

[0006] In a specific embodiment, the first heating pipe, the reflux pipe and the second heating pipe form a heating channel, a plurality of heating channels are arranged, and the plurality of heating channels are arranged in a circumferential array along the outer edge of the inlet pipe.

[0007] In a specific embodiment, a conical guide block is arranged in the connecting box, the conical guide block is arranged at the outlet end of the inlet pipe, and the hot gas at the outlet end of the inlet pipe is guided to the inlet end of the first heating pipe through the inclined surface of the conical guide block.

[0008] In a specific embodiment, a supporting ring is arranged in the furnace body, and the end of the first heating pipe and the end of the second heating pipe away from the connecting box are arranged on the supporting ring.

[0009] In one specific implementation, the support ring is provided with a plurality of ventilation openings.

[0010] In one specific implementation, the first air outlet pipe is communicated with a reflux box at one end away from the furnace body, the reflux box is provided with a second air outlet pipe, the reflux box is provided with a fan, the air inlet end of the fan is provided with a gas supplement pipe, and the air outlet end of the fan is provided with a recovery pipe communicated with the air inlet end of the air inlet pipe.

[0011] In one specific implementation, a converging hopper is arranged between the reflux box and the second air outlet pipe, and the open end of the converging hopper is communicated with the reflux box.

[0012] In one specific implementation, the reflux box is provided with a first mounting ring at one end facing the first air outlet pipe, the first air outlet pipe is provided with a second mounting ring at one end away from the furnace body, and the first mounting ring and the second mounting ring are connected through a connecting unit.

[0013] In one specific implementation, the connecting unit comprises a mounting bolt sequentially penetrating through the first mounting ring and the second mounting ring, a mounting nut matched with the mounting bolt is threadedly connected to the outer edge of the mounting bolt, and the second mounting ring is abutted between the mounting bolt and the mounting nut.

[0014] In one specific implementation, the furnace body is provided with a plurality of cushion blocks.

[0015] In summary, the present application has at least the following beneficial technical effects: cold air is introduced into the furnace body through the input pipe, hot air generated by burning fuel enters the connecting box through the air inlet pipe, and then the hot air sequentially passes through the first heating pipe, the reflux pipe and the second heating pipe and is discharged through the first air outlet pipe. The route of the hot air in the heating device is a curved loop, thereby increasing the contact area of the cold air in the furnace body with the heating device, improving the speed of cold air heat exchange and the heating efficiency of the cold air. After the cold air is heated to the required temperature, it is discharged from the furnace body through the output pipe for subsequent production and use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0017] Figure 2 is a schematic diagram of the structure of the heating device in the embodiment of the present application.

[0018] Figure 3 is a cross-sectional view of the tapered guide block in the embodiment of the present application.

[0019] Figure 4 is a schematic diagram of the structure of the reflux box in the embodiment of the present application.

[0020] Figure numerals: 1. furnace body; 2. air inlet pipe; 3. connecting box; 4. first air outlet pipe; 5. first heating pipe; 6. return pipe; 7. second heating pipe; 8. conical guide block; 9. support ring; 10. vent; 11. return box; 12. second air outlet pipe; 13. air supply pipe; 14. recovery pipe; 15. gathering bucket; 16. first mounting ring; 17. raising block. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1-4 This application is described in further detail.

[0022] The embodiment of the present application discloses a high-efficiency hot air stove.

[0023] Reference Figure 1 and Figure 2 The high-efficiency hot blast furnace includes a furnace body 1, and four raising blocks 17 are fixedly connected to the bottom of the furnace body 1. The four raising blocks 17 are evenly distributed on the four corners of the bottom of the furnace body 1. The raising blocks 17 facilitate the operator to carry the furnace body 1 as a whole. A heating device is provided in the furnace body 1, and the heating device includes a mounting frame provided in the furnace body 1, on which an air inlet pipe 2 is installed, and the air outlet end of the air inlet pipe 2 is connected to a connecting box 3, and the connecting box 3 is connected to a first air outlet pipe 4 and a first heating pipe 5, and the first air outlet pipe 4 is provided on the top of the connecting box 3 and partially passes through the furnace body 1, and the end of the first heating pipe 5 facing away from the connecting box 3 is connected to an arc-shaped return pipe 6, and the end of the return pipe 6 facing away from the first heating pipe 5 is connected to a second heating pipe 7, and the second heating pipe 7 is connected to the connecting box 3. In the embodiment of the present application, the first heating pipe 5, the return pipe 6 and the second heating pipe 7 are connected to form a heating channel with a U-shaped structure, and a plurality of heating channels are provided, and the plurality of heating channels are arranged in an array along the circumference of the outer edge of the air inlet pipe 2, so as to facilitate uniform heating of the cold air in the furnace body 1 and improve the heating efficiency.

[0024] Therefore, cold air enters the furnace body 1 through the input pipe, and the hot air generated by the burning fuel enters the connecting box 3 through the air inlet pipe 2. The hot air then passes through the first heating pipe 5, the return pipe 6 and the second heating pipe 7 in sequence and is discharged from the first outlet pipe 4. The route of the hot air in the heating device is a curved loop, thereby increasing the contact area between the cold air in the furnace body 1 and the heating device, improving the speed of heat exchange of the cold air and the heating efficiency of the cold air. After the cold air is heated to the required temperature, it is discharged from the furnace body 1 through the output pipe for subsequent production use.

[0025] Reference Figure 1 and Figure 2The support ring 9 is arranged in the furnace body 1 and is horizontally arranged on the same line as the connecting box 3. The first heating pipe 5 and the second heating pipe 7 are arranged on the support ring 9, and the support ring 9 is provided with a plurality of waist-shaped air vents 10. The cold air in the furnace body 1 can pass through the air vents 10, thereby further improving the heat exchange effect of the cold air. Therefore, the support ring 9 supports the first heating pipe 5 and the second heating pipe 7, reduces the possibility of shaking of the heating channel, and improves the stability of the installation of the heating device.

[0026] With reference to Figure 2 and Figure 3 The connecting box 3 is fixedly connected with a conical guide block 8. The conical guide block 8 is arranged at the air outlet end of the air inlet pipe 2, and the hot air at the air outlet end of the air inlet pipe 2 is transported to the air inlet end of the first heating pipe 5 through the inclined surface of the conical guide block 8. Therefore, in the related art, the hot air is concentrated at the air outlet end of the air inlet pipe 2, which causes the local temperature to be too high. The transport efficiency of the hot air from the air outlet end of the air inlet pipe 2 to the air inlet end of the first heating pipe 5 is poor. The inclined surface of the conical guide block 8 provides a guide function for the transport direction of the hot air, so that the hot air enters the first heating pipe 5 after passing through the inclined surface of the conical guide block 8, thereby reducing the concentration of the hot energy at the air outlet end of the air inlet pipe 2 and the local temperature being too high.

[0027] With reference to Figure 1 and Figure 4 The end of the first air outlet pipe 4 away from the furnace body 1 is communicated with a reflux box 11. The reflux box 11 is fixedly connected with a second air outlet pipe 12. A fan is arranged in the reflux box 11. The air inlet end of the fan is connected with a gas supplement pipe 13. The air outlet end of the fan is connected with a recovery pipe 14 which is communicated with the air inlet end of the air inlet pipe 2. The recovery pipe 14 is communicated with the reflux box 11. A converging hopper 15 is arranged between the reflux box 11 and the second air outlet pipe 12. The open end of the converging hopper 15 is communicated with the reflux box 11. The converging hopper 15 guides the exhaust gas discharged by the heating device, thereby improving the efficiency of the hot air discharged from the reflux box.

[0028] Therefore, the hot air is discharged into the reflux box 11 through the first air outlet pipe 4. The fan is started, and air is extracted through the gas supplement pipe 132. The reflux pipe 6 synchronously transports part of the hot air in the reflux box 11 and the extracted air to the air inlet end of the air inlet pipe 2, thereby capturing the waste heat discharged by the heating device. Through the recovery of the waste heat, the dependence on new energy can be reduced, the energy consumption can be reduced, the overall energy utilization efficiency can be improved, the carbon emissions caused by energy production can be indirectly reduced, and the production cost can be reduced.

[0029] With reference to Figure 1 and Figure 4The first mounting ring 16 is fixedly connected to one end of the first air outlet pipe 4, and the second mounting ring is fixedly connected to the end of the first air outlet pipe 4 away from the furnace body 1. The first mounting ring 16 and the second mounting ring are connected through a connecting unit. The connecting unit comprises mounting bolts which are sequentially threaded through the first mounting ring 16 and the second mounting ring. The mounting bolts are externally threaded with mounting nuts which are matched in size with the mounting bolts. The second mounting ring is abutted between the mounting bolts and the mounting nuts. Therefore, the operator can detach the reflux box 11 from the second mounting ring by means of bolt dismounting, so as to realize detachable connection of the reflux box 11 and achieve higher flexibility.

[0030] The principle of the embodiment of the present application is that the cold air is introduced into the furnace body 1 through the input pipe, the hot air generated by burning the fuel is introduced into the connecting box 3 through the air inlet pipe 2, and then the hot air is sequentially discharged through the first heating pipe 5, the reflux pipe 6 and the second heating pipe 7, and then discharged through the first air outlet pipe 4. The route of the hot air in the heating device is a curved loop, so as to increase the contact area of the cold air in the furnace body 1 with the heating device, improve the speed of heat exchange of the cold air and the heating efficiency of the cold air, and heat the cold air to the required temperature, and then discharge the cold air from the furnace body 1 through the output pipe for subsequent production and use.

[0031] The embodiment is only an explanation of the present application, and is not a limitation of the present application. Those skilled in the art can make modifications to the embodiment without creative contribution according to the needs after reading the present specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A high-efficiency hot air stove, characterized by: The invention comprises a furnace body (1), wherein a heating device is provided in the furnace body (1), wherein the heating device comprises a mounting frame arranged in the furnace body (1), wherein an air inlet pipe (2) is provided on the mounting frame, wherein the air outlet end of the air inlet pipe (2) is connected to a connection box (3), wherein the connection box (3) is connected to a first air outlet pipe (4) and a first heating pipe (5), wherein the end of the first heating pipe (5) facing away from the connection box (3) is provided with a return pipe (6), wherein the end of the return pipe (6) facing away from the first heating pipe (5) is provided with a second heating pipe (7), and the second heating pipe (7) is connected to the connection box (3).

2. The high-efficiency hot blast stove according to claim 1, characterized in that: The first heating tube (5), the return tube (6) and the second heating tube (7) constitute a heating channel, and the heating channels are provided in plurality, and the plurality of heating channels are respectively arranged in a circular array along the outer edge of the air inlet pipe (2).

3. The high-efficiency hot blast stove according to claim 1, characterized in that: A conical guide block (8) is provided in the connection box (3), and the conical guide block (8) is arranged at the outlet end of the air inlet pipe (2), and the hot air at the outlet end of the air inlet pipe (2) is transported to the air inlet end of the first heating pipe (5) after passing through the inclined surface of the conical guide block (8).

4. The high-efficiency hot blast stove according to claim 1, characterized in that: A support ring (9) is provided in the furnace body (1), and the ends of the first heating tube (5) and the second heating tube (7) facing away from the connection box (3) are both provided on the support ring (9).

5. The high-efficiency hot blast stove according to claim 4, characterized in that: The support ring (9) is provided with a plurality of ventilation holes (10).

6. The high-efficiency hot blast stove according to claim 1, characterized in that: The end of the first air outlet pipe (4) facing away from the furnace body (1) is connected to a return box (11), a second air outlet pipe (12) is provided on the return box (11), a fan is provided in the return box (11), an air supply pipe (13) is provided at the air inlet end of the fan, and a recovery pipe (14) is provided at the air outlet end of the fan and is communicated with the air inlet end of the air inlet pipe (2).

7. The high-efficiency hot blast stove according to claim 6, characterized in that: A collecting hopper (15) is provided between the reflux box (11) and the second air outlet pipe (12), and the open end of the collecting hopper (15) is communicated with the reflux box (11).

8. The high-efficiency hot blast stove according to claim 6, characterized in that: The reflux box (11) is provided with a first mounting ring (16) at one end facing the first gas outlet pipe (4), and a second mounting ring is provided at one end of the first gas outlet pipe (4) facing away from the furnace body (1). The first mounting ring (16) and the second mounting ring are connected via a connecting unit.

9. The high-efficiency hot blast stove according to claim 8, characterized in that: The connection unit comprises a mounting bolt which passes through a first mounting ring (16) and a second mounting ring in sequence, the outer edge of the mounting bolt is threadedly connected with a mounting nut which matches the mounting bolt, and the second mounting ring is tightly pressed between the mounting bolt and the mounting nut.

10. The high-efficiency hot blast stove according to claim 1, characterized in that: A plurality of raising blocks (17) are provided on the furnace body (1).

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