A control device for intelligent combustion of hot blast stove in blast furnace

Abstract

The present invention is applicable to the technical field of hot blast stoves, and provides a control device for intelligent combustion of a blast furnace hot blast stove, including a combustion component, a heat exchange component and a control component, wherein the combustion component includes a shell, a mounting plate, a combustion furnace, a burner, a gas pipe, a first fan and a gas supply pipe; by arranging a second fan, an igniter and a first fan, a controller can control the gas valve to start and then discharge the gas into the burner, and the controller can control the igniter and the second fan to start, so that the igniter ignites the gas discharged from the burner, and at the same time the second fan discharges cold air into the second fan and the heat exchange tube, which can be heated by the burning gas when passing through the heat exchange tube, thereby forming a hot air flow, thereby avoiding the problem that most traditional blast furnace hot blast stoves are manually controlled, lack precise furnace temperature control and temperature rise curve control, and the combustion condition and furnace flow rate depend on the experience of the operator, resulting in inaccurate control and high heat loss.

Description

Technical Field

[0001] The invention belongs to the technical field of hot blast stoves, and in particular relates to a control device for intelligent combustion of a blast furnace hot blast stove. Background Art

[0002] As the name implies, a hot blast furnace is a thermal equipment that integrates combustion and heat transfer processes to provide hot air flow for process needs. There are generally two major types, namely, intermittent regenerative hot blast furnaces and continuous heat exchange hot blast furnaces. In today's world where high-temperature ceramic heat exchange devices are not yet mature, intermittent regenerative hot blast furnaces are still the mainstream products of hot blast furnaces. In order to continuously provide hot air, at least two regenerative hot blast furnaces must work alternately. Hot blast furnaces are widely used in many fields of industrial production. Due to different process requirements, different types of fuels, and different hot air media, hot blast furnaces with different uses and structures are derived. What we want to introduce here is the hot blast furnace that provides high-temperature hot air for blast furnace smelting, and they are all regenerative chamber hot blast furnaces. Because of their intermittent working mode, multiple units must be coordinated to achieve continuous high air temperature to the blast furnace.

[0003] Traditional blast furnace hot blast stoves are mostly manually controlled, lacking precise furnace temperature control and heating curve control. The combustion conditions and furnace flow rate depend on the operator's experience, resulting in inaccurate control and high heat loss. Summary of the invention

[0004] The present invention provides a control device for intelligent combustion of a blast furnace hot blast stove, aiming to solve the problems that most traditional blast furnace hot blast stoves are manually controlled, lack precise furnace temperature control and heating curve control, and the combustion condition and furnace flow rate depend on the experience of the operator, resulting in inaccurate control and high heat loss.

[0005] The present invention is implemented as follows: a control device for intelligent combustion of a blast furnace hot blast stove, comprising a combustion component, a heat exchange component and a control component, wherein the combustion component comprises a shell, a mounting plate, a combustion furnace, a burner, a gas pipe, a first fan and an air supply pipe, wherein the mounting plate is fixedly connected to the shell, and the mounting plate is located in the inner cavity of the shell, the combustion furnace is fixedly connected to the mounting plate, and the combustion furnace is located on one side of the mounting plate, the burner is fixedly connected to the mounting plate, and the mounting plate is located in the inner cavity of the combustion furnace, the gas pipe is fixedly connected to the output end of the burner, and the gas pipe passes through the shell and extends to the outside of the shell, the air supply pipe is fixedly connected to the combustion furnace and the shell, and the air supply pipe passes through the combustion furnace and the shell and extends to the outside of the shell, the output end of the first fan is fixedly connected to the air supply pipe, and the first fan is located at the end of the air supply pipe away from the combustion furnace;

[0006] The heat exchange component includes a second fan and an air supply pipe, the second fan is fixedly connected to the shell and is located on a side wall of the shell, the air supply pipe is fixedly connected to the output end of the second fan, and the second fan passes through the shell and extends to the outside of the combustion furnace.

[0007] Preferably, the heat exchange assembly also includes a heat exchange pipe, an air outlet pipe, a flue gas pipe, a third fan, a check valve and a temperature-regulating heat exchange pipe, the heat exchange pipe is fixedly connected to the air supply pipe, and the heat exchange pipe is located in the inner cavity of the combustion furnace, the air outlet pipe is fixedly connected to the heat exchange pipe, and the air outlet pipe is located at an end of the heat exchange pipe away from the air supply pipe, the air outlet pipe passes through the shell and extends to the outside of the shell, the flue gas pipe is fixedly connected to the combustion furnace, and the temperature-regulating heat exchange pipe passes through the combustion furnace and the shell and extends to the outside of the shell, the temperature-regulating heat exchange pipe is fixedly connected to the air outlet pipe, and the temperature-regulating heat exchange pipe passes through the air outlet pipe and extends to the inner cavity of the air supply pipe, the check valve is fixedly connected to the temperature-regulating heat exchange pipe, and the check valve is located at one end of the temperature-regulating heat exchange pipe, the output end of the third fan is fixedly connected to the check valve, and the third fan is located at an end of the check valve away from the temperature-regulating heat exchange pipe.

[0008] Preferably, the control component includes a controller, a temperature sensor, a flow sensor and a pressure sensor, the controller is fixedly connected to the shell, and the check valve, the first fan, the second fan and the third fan are all electrically connected to the controller, the temperature sensor, the flow sensor and the pressure sensor are all fixedly connected to the air outlet pipe, and the temperature sensor, the flow sensor and the pressure sensor are all located in the inner cavity of the air outlet pipe, and the temperature sensor, the flow sensor and the pressure sensor are all electrically connected to the controller.

[0009] Preferably, the combustion assembly further comprises a supporting foot, wherein the supporting foot is fixedly connected to the shell, and four supporting feet are provided, and the four supporting feet are respectively located at four corners of one side of the shell.

[0010] Preferably, the combustion assembly further comprises a gas valve, the gas valve is fixedly connected to the gas pipe, the gas valve is located at an end of the gas valve away from the burner, and the gas valve is electrically connected to the controller.

[0011] Preferably, the combustion assembly further includes an igniter, the igniter is fixedly connected to the combustion furnace, and the combustion furnace is located on one side of the burner, and the igniter is electrically connected to the controller.

[0012] Preferably, the heat exchange assembly further comprises a return pipe, the return pipe is fixedly connected to the temperature-regulating heat exchange pipe, the return pipe is located at one end of the temperature-regulating heat exchange pipe away from the check valve, and the return pipe runs through the air supply pipe.

[0013] Preferably, the heat exchange assembly further comprises fins, the fins are fixedly connected to both the heat exchange tube and the temperature-regulating heat exchange tube, and the fins are provided in a plurality of groups, and each group of fins is evenly and equidistantly arranged between the heat exchange tube and the temperature-regulating heat exchange tube.

[0014] Preferably, the heat exchange tube is made of austenitic steel.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: a control device for intelligent combustion of a blast furnace hot blast stove of the present invention is provided with a controller and a temperature sensor, and is connected to a third fan, so that the temperature sensor can detect the outlet air temperature of the outlet duct in real time, and control the operation of the third fan, thereby controlling the amount of low-temperature air entering the temperature-regulating heat exchange tube, and then adjusting the outlet air temperature discharged from the outlet duct to the required temperature; by providing a second fan, an igniter and a first fan, the controller can control the gas valve to start when the gas is discharged into the burner, and the controller can control the igniter and the second fan to start, so that the igniter ignites the gas discharged from the burner, and at the same time the second fan discharges cold air into the second fan and the heat exchange tube, which can be heated by the burning gas when passing through the heat exchange tube, thereby forming a hot air flow, avoiding the problem that most traditional blast furnace hot blast stoves are manually controlled, lack precise furnace temperature control and temperature rise curve control, and the combustion conditions and furnace flow depend on the experience of the operator, resulting in inaccurate control and more heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the temperature-adjusting heat exchange tube structure of the present invention;

[0018] Figure 3 This is a principle block diagram of the present invention.

[0019] In the figure: 1-combustion component, 11-shell, 12-support foot, 13-mounting plate, 14-combustion furnace, 15-burner, 16-gas pipe, 17-gas valve, 18-first fan, 19-gas supply pipe, 110-igniter, 2-heat exchange component, 21-second fan, 22-air supply pipe, 23-heat exchange pipe, 24-air outlet pipe, 25-smoke pipe, 26-third fan, 27-check valve, 28-temperature-adjusting heat exchange pipe, 29-reflux pipe, 210-fin, 3-control component, 31-controller, 32-temperature sensor, 33-flow sensor, 34-pressure sensor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] See also Figure 1-3 The present invention provides a technical solution: a control device for intelligent combustion of a blast furnace hot blast stove, comprising a combustion component 1, a heat exchange component 2 and a control component 3, wherein the combustion component 1 comprises a shell 11, a mounting plate 13, a combustion furnace 14, a burner 15, a gas pipe 16, a first blower 18 and a gas supply pipe 19, the mounting plate 13 is fixedly connected to the shell 11, and the mounting plate 13 is located in the inner cavity of the shell 11, the combustion furnace 14 is fixedly connected to the mounting plate 13, and the combustion furnace 14 is located on one side of the mounting plate 13, and the burner 15 is fixedly connected to the mounting plate 13. The mounting plate 13 is fixedly connected, and the mounting plate 13 is located in the inner cavity of the combustion furnace 14. The gas pipe 16 is fixedly connected to the output end of the burner 15, and the gas pipe 16 passes through the shell 11 and extends to the outside of the shell 11. The air supply pipe 19 is fixedly connected to the combustion furnace 14 and the shell 11, and the air supply pipe 19 passes through the combustion furnace 14 and the shell 11 and extends to the outside of the shell 11. The output end of the first fan 18 is fixedly connected to the air supply pipe 19, and the first fan 18 is located at the end of the air supply pipe 19 away from the combustion furnace 14.

[0022] The heat exchange assembly 2 includes a second fan 21 and an air supply pipe 22. The second fan 21 is fixedly connected to the housing 11 and is located on a side wall of the housing 11. The air supply pipe 22 is fixedly connected to the output end of the second fan 21. The second fan 21 penetrates the housing 11 and extends to the outside of the combustion furnace 14.

[0023] The heat exchange assembly 2 also includes a heat exchange pipe 23, an air outlet pipe 24, a flue gas pipe 25, a third fan 26, a check valve 27 and a temperature-adjusting heat exchange pipe 28. The heat exchange pipe 23 is fixedly connected to the air supply pipe 22, and the heat exchange pipe 23 is located in the inner cavity of the combustion furnace 14. The air outlet pipe 24 is fixedly connected to the heat exchange pipe 23, and the air outlet pipe 24 is located at one end of the heat exchange pipe 23 away from the air supply pipe 22. The air outlet pipe 24 penetrates the shell 11 and extends to the outside of the shell 11. The flue gas pipe 25 is fixedly connected to the combustion furnace 14, and the temperature-adjusting heat exchange pipe 28 is fixedly connected to the air supply pipe 22. The temperature heat exchange pipe 28 passes through the combustion furnace 14 and the shell 11 and extends to the outside of the shell 11. The temperature-adjusting heat exchange pipe 28 is fixedly connected to the air outlet pipe 24, and the temperature-adjusting heat exchange pipe 28 passes through the air outlet pipe 24 and extends to the inner cavity of the air supply pipe 22. The check valve 27 is fixedly connected to the temperature-adjusting heat exchange pipe 28, and the check valve 27 is located at one end of the temperature-adjusting heat exchange pipe 28. The output end of the third fan 26 is fixedly connected to the check valve 27, and the third fan 26 is located at one end of the check valve 27 away from the temperature-adjusting heat exchange pipe 28.

[0024] The control component 3 includes a controller 31, a temperature sensor 32, a flow sensor 33 and a pressure sensor 34. The controller 31 is fixedly connected to the shell 11, and the check valve 27, the first fan 18, the second fan 21 and the third fan 26 are all electrically connected to the controller 31. The temperature sensor 32, the flow sensor 33 and the pressure sensor 34 are all fixedly connected to the air outlet pipe 24, and the temperature sensor 32, the flow sensor 33 and the pressure sensor 34 are all located in the inner cavity of the air outlet pipe 24. The temperature sensor 32, the flow sensor 33 and the pressure sensor 34 are all electrically connected to the controller 31.

[0025] In this embodiment, a third fan 26, a check valve 27 and a temperature-regulating heat exchange tube 28 are provided, and the temperature-regulating heat exchange tube 28 is installed in the inner cavity of the air outlet pipe 24 and the heat exchange tube 23, so that when the outlet air temperature of the air outlet pipe 24 is too high, the third fan 26 can be started and the check valve 27 can be opened to discharge the outside air with a lower temperature into the inner cavity of the temperature-regulating heat exchange tube 28. When the lower temperature air flows in the inner cavity of the temperature-regulating heat exchange tube 28, it can exchange heat with the higher temperature air flowing in the inner cavity of the air outlet pipe 24, thereby reducing the temperature of the air flowing in the inner cavity of the air outlet pipe 24. By providing a controller 31 and a temperature sensor 32 and connecting them to the third fan 26, the temperature sensor 32 can detect the outlet air temperature of the air outlet pipe 24 in real time, and control the operation of the third fan 26, thereby controlling the low-temperature air to enter. The amount of temperature-adjustable heat exchange tube 28 is adjusted, and then the outlet air temperature discharged from outlet pipe 24 is adjusted to the required temperature. By setting the second fan 21, igniter 110 and first fan 18, the controller 31 can control the gas valve 17 to start and the gas is discharged into the burner 15. The controller 31 can control the igniter 110 and the second fan 21 to start, so that the igniter 110 ignites the gas discharged from the burner 15. At the same time, the second fan 21 discharges cold air into the second fan 21 and the heat exchange tube 23, which can be heated by the burning gas when passing through the heat exchange tube 23, thereby forming a hot air flow, avoiding the problem that most traditional blast furnace hot blast furnaces are manually controlled, lack precise furnace temperature control and temperature rise curve control, and the combustion conditions and furnace flow rate depend on the experience of the operator, resulting in inaccurate control and high heat loss.

[0026] Furthermore, the combustion assembly 1 also includes a supporting foot 12 , which is fixedly connected to the shell 11 , and there are four supporting feet 12 , which are respectively located at four corners of one side of the shell 11 .

[0027] In this embodiment, by providing support legs 12 and evenly installing the support legs 12 at the four corners of the bottom ends of the support legs 12 , the device is effectively supported.

[0028] Furthermore, the combustion assembly 1 further includes a gas valve 17 , which is fixedly connected to the gas pipe 16 , and is located at one end of the gas valve 17 away from the burner 15 , and the gas valve 17 is electrically connected to the controller 31 .

[0029] In this embodiment, the gas valve 17 is provided so that the gas valve 17 can control the amount of gas discharged into the burner 15, thereby controlling the combustion amount of the gas.

[0030] Furthermore, the combustion assembly 1 also includes an igniter 110 , which is fixedly connected to the combustion furnace 14 , and the combustion furnace 14 is located on one side of the burner 15 , and the igniter 110 is electrically connected to the controller 31 .

[0031] In this embodiment, the igniter 110 is provided so that the controller 31 controls the igniter 110 to operate and ignite the gas discharged from the output end of the burner 15 .

[0032] Furthermore, the heat exchange assembly 2 also includes a return pipe 29 , which is fixedly connected to the temperature-regulating heat exchange pipe 28 , and is located at one end of the temperature-regulating heat exchange pipe 28 away from the check valve 27 , and runs through the air supply pipe 22 .

[0033] In this embodiment, a return pipe 29 is provided, and one end of the return pipe 29 is connected to the temperature-regulating heat exchange pipe 28, and the other end is returned to the inner cavity of the air supply pipe 22, so that the air heated in the inner cavity of the temperature-regulating heat exchange pipe 28 is returned to the inner cavity of the air supply pipe 22, thereby realizing the recovery of heat after heat exchange in the inner cavity of the temperature-regulating heat exchange pipe 28.

[0034] Furthermore, the heat exchange component 2 also includes fins 210, which are fixedly connected to the heat exchange tube 23 and the temperature-regulating heat exchange tube 28, and the fins 210 are provided in several groups, and each group of fins 210 is evenly and equidistantly arranged between the heat exchange tube 23 and the temperature-regulating heat exchange tube 28.

[0035] In this embodiment, the fins 210 are provided and evenly arranged between the heat exchange tubes 23 and the temperature-regulating heat exchange tubes 28 , thereby effectively improving the heat exchange efficiency of the heat exchange tubes 23 and the temperature-regulating heat exchange tubes 28 .

[0036] Furthermore, the heat exchange tube 23 is made of austenitic steel.

[0037] In this embodiment, austenitic steel material resistant to high temperature is used to support the heat exchange tube 23 , thereby increasing the service life of the heat exchange tube 23 .

[0038] The working principle and use process of the present invention are as follows: After the present invention is installed, the air outlet pipe 24 is connected to the pipe that needs to provide hot air, and then the controller 31 controls the second fan 21, the first fan 18, the gas valve 17 and the igniter 110 to work simultaneously, the gas valve 17 is opened to discharge the gas to the output end of the burner 15, the igniter 110 ignites the gas discharged from the output end of the burner 15, and at the same time, the first fan 18 discharges the outside air into the inner cavity of the combustion furnace 14 through the air supply pipe 19, thereby increasing the oxygen required for gas combustion, and at the same time, the second fan 21 draws the outside air into the inner cavity of the air supply pipe 22 and the heat exchange tube 23, and after the air enters the inner cavity of the heat exchange tube 23, it is heated, and finally The air is discharged into the hot air duct through the air outlet pipe 24. The temperature sensor 32 can detect the air outlet temperature on the temperature sensor 32 side in real time. When the temperature is low, the opening size of the gas valve 17 can be controlled to discharge more gas, so that the air in the inner cavity of the heat exchange tube 23 is heated to a higher temperature. When the air temperature discharged by the temperature sensor 32 is high, the controller 31 can control the check valve 27 and the third fan 26 to open, so as to discharge the outside air with a lower temperature into the inner cavity of the temperature-regulating heat exchange tube 28. When the air with a lower temperature flows in the inner cavity of the temperature-regulating heat exchange tube 28, it can exchange heat with the air with a higher temperature flowing in the inner cavity of the air outlet pipe 24, thereby reducing the temperature of the air flowing in the inner cavity of the air outlet pipe 24.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A control device for intelligent combustion of a blast furnace hot blast stove, characterized in that: The invention comprises a combustion component (1), a heat exchange component (2) and a control component (3); the combustion component (1) comprises a shell (11), a mounting plate (13), a combustion furnace (14), a burner (15), a gas pipe (16), a first fan (18) and a gas supply pipe (19); the mounting plate (13) is fixedly connected to the shell (11), and the mounting plate (13) is located in the inner cavity of the shell (11); the combustion furnace (14) is fixedly connected to the mounting plate (13), and the combustion furnace (14) is located on one side of the mounting plate (13); the burner (15) is fixedly connected to the mounting plate (13), and the mounting plate (13) is located in the inner cavity of the combustion furnace (14); the gas pipe (16) is fixedly connected to the output end of the burner (15), and the gas pipe (16) passes through the shell (11) and extends to the outer cavity of the shell (11); On the outside, the air supply pipe (19) is fixedly connected to the combustion furnace (14) and the shell (11), and the air supply pipe (19) penetrates the combustion furnace (14) and the shell (11) and extends to the outside of the shell (11), the output end of the first fan (18) is fixedly connected to the air supply pipe (19), and the first fan (18) is located at an end of the air supply pipe (19) away from the combustion furnace (14); the heat exchange component (2) comprises a second fan (21) and an air supply pipe (22), the second fan (21) is fixedly connected to the shell (11), and the second fan (21) is located on a side wall of the shell (11), the air supply pipe (22) is fixedly connected to the output end of the second fan (21), and the second fan (21) penetrates the shell (11) and extends to the outside of the combustion furnace (14);The heat exchange assembly (2) further comprises a heat exchange pipe (23), an air outlet pipe (24), a flue gas pipe (25), a third fan (26), a check valve (27) and a temperature-regulating heat exchange pipe (28); the heat exchange pipe (23) is fixedly connected to the air supply pipe (22), and the heat exchange pipe (23) is located in the inner cavity of the combustion furnace (14); the air outlet pipe (24) is fixedly connected to the heat exchange pipe (23), and the air outlet pipe (24) is located at one end of the heat exchange pipe (23) away from the air supply pipe (22); the air outlet pipe (24) passes through the shell (11) and extends to the outside of the shell (11); the flue gas pipe (25) is connected to the third fan (26), a check valve (27) and a temperature-regulating heat exchange pipe (28); The air pipe (25) is fixedly connected to the combustion furnace (14), and the temperature-adjusting heat exchange pipe (28) passes through the combustion furnace (14) and the shell (11) and extends to the outside of the shell (11); the temperature-adjusting heat exchange pipe (28) is fixedly connected to the air outlet pipe (24), and the temperature-adjusting heat exchange pipe (28) passes through the air outlet pipe (24) and extends to the inner cavity of the air supply pipe (22); the check valve (27) is fixedly connected to the temperature-adjusting heat exchange pipe (28), and the check valve (27) is located at one end of the temperature-adjusting heat exchange pipe (28); the output end of the third fan (26) is connected to the check valve (27). The first fan (18), the second fan (21) and the third fan (26) are fixedly connected, and the third fan (26) is located at an end of the check valve (27) away from the temperature-adjusting heat exchange tube (28); the control component (3) comprises a controller (31), a temperature sensor (32), a flow sensor (33) and a pressure sensor (34); the controller (31) is fixedly connected to the housing (11), and the check valve (27), the first fan (18), the second fan (21) and the third fan (26) are all electrically connected to the controller (31); the temperature sensor (32), the flow sensor (33) and the pressure sensor (34) are all electrically connected to the outlet The air duct (24) is fixedly connected, and the temperature sensor (32), flow sensor (33) and pressure sensor (34) are all located in the inner cavity of the air outlet duct (24), and the temperature sensor (32), flow sensor (33) and pressure sensor (34) are all electrically connected to the controller (31); the heat exchange component (2) also includes a return pipe (29), the return pipe (29) is fixedly connected to the temperature-adjusting heat exchange pipe (28), and the return pipe (29) is located at one end of the temperature-adjusting heat exchange pipe (28) away from the check valve (27), and the return pipe (29) passes through the air supply pipe (22). ; 2. The intelligent combustion control device for hot blast stoves in blast furnaces according to claim 1, characterized in that: The combustion assembly (1) further comprises a supporting foot (12), wherein the supporting foot (12) is fixedly connected to the shell (11), and four supporting feet (12) are provided, and the four supporting feet (12) are respectively located at four corners of one side of the shell (11).

3. The intelligent combustion control device for hot blast stoves in blast furnaces according to claim 1, characterized in that: The combustion assembly (1) further comprises a gas valve (17), wherein the gas valve (17) is fixedly connected to the gas pipe (16), and the gas valve (17) is located at an end of the gas valve (17) away from the burner (15), and the gas valve (17) is electrically connected to the controller (31).

4. The intelligent combustion control device for hot blast stoves in blast furnaces according to claim 1, characterized in that: The combustion assembly (1) further comprises an igniter (110), wherein the igniter (110) is fixedly connected to the combustion furnace (14), and the combustion furnace (14) is located on one side of the burner (15), and the igniter (110) is electrically connected to the controller (31).

5. The intelligent combustion control device for hot blast stoves in blast furnaces according to claim 1, characterized in that: The heat exchange component (2) further comprises fins (210), wherein the fins (210) are fixedly connected to both the heat exchange tube (23) and the temperature-regulating heat exchange tube (28), and the fins (210) are provided in a plurality of groups, and each group of the fins (210) is evenly and equidistantly arranged between the heat exchange tube (23) and the temperature-regulating heat exchange tube (28).

6. The intelligent combustion control device for hot blast stoves in blast furnaces according to claim 1, characterized in that: The heat exchange tube (23) is made of austenitic steel.

Images