Waste heat utilization system for coke oven

Abstract

The utility model relates to a waste heat utilization system for a coke oven, and belongs to the technical field of waste heat utilization. Comprising a heat exchange tank and a heat exchanger, a heat dissipation hole output pipe is arranged at a heat dissipation hole in one side of the coke oven, a heat dissipation hole return pipe is arranged at a heat dissipation hole in the other side of the coke oven, a flue output pipe is arranged at a flue outlet of the coke oven, the heat exchanger is arranged on one side of the coke oven, and the heat exchange tank is arranged between the coke oven and the heat exchanger. A spiral flue spiral pipe is arranged on the inner side face of the heat exchange tank, and a flue output pipe is connected with the flue spiral pipe. A conveying mechanism is arranged in the heat exchange tank, a heat dissipation hole output pipe is connected with a heat exchange water inlet pipe of the heat exchange tank, a heat exchange water outlet pipe of the heat exchange tank is connected with a medium inlet of the heat exchanger through a heat exchange water transition pipe, and a heat dissipation hole return pipe is connected with a medium outlet of the heat exchanger. The problem that an existing device for utilizing the waste heat of the coke oven can only utilize the waste heat in heat dissipation holes in the bottom of the coke oven is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat utilization, and in particular relates to a waste heat utilization system for a coke oven. Background Art

[0002] A heat recovery coke oven generates a large amount of heat in the flue and heat dissipation holes during the coking process. Existing devices for utilizing the waste heat of the coke oven, such as the utility model patent "CN 218270263 U A coke oven bottom waste heat utilization device", can only utilize the waste heat in the heat dissipation holes at the bottom of the coke oven, but cannot utilize the waste heat in the high-temperature flue gas in the flue. If the waste heat in the high-temperature flue gas in the flue is to be utilized, other devices can only be set up to utilize it, thereby increasing the cost of recycling the waste heat of the coke oven. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and proposes a waste heat utilization system for a coke oven, solving the problem that the current device for utilizing the waste heat of a coke oven can only utilize the waste heat in the heat dissipation holes at the bottom of the coke oven.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions.

[0005] A waste heat utilization system for a coke oven comprises a heat exchanger, a heat exchange tank, a heat dissipation hole output pipe, a heat dissipation hole return pipe, a hot water transition pipe, a flue output pipe, a flue spiral pipe, and a conveying mechanism; the heat dissipation hole output pipe is arranged at the heat dissipation hole on one side of the coke oven, the heat dissipation hole return pipe is arranged at the heat dissipation hole on the other side of the coke oven, one end of the flue output pipe is connected to the flue outlet of the coke oven, the heat exchanger is arranged at one side of the coke oven, the heat exchange tank is arranged between the coke oven and the heat exchanger, a spiral flue spiral pipe is arranged on the inner side surface of the heat exchange tank, and the flue output pipe is connected to the flue spiral pipe; a conveying mechanism is arranged inside the heat exchange tank, the heat dissipation hole output pipe is connected to the hot water inlet pipe of the heat exchange tank, the hot water outlet pipe of the heat exchange tank is connected to the medium inlet of the heat exchanger through the hot water transition pipe, and the heat dissipation hole return pipe is connected to the medium outlet of the heat exchanger.

[0006] Furthermore, a first solenoid valve and a first water pump are provided on the heat dissipation hole output pipe.

[0007] Furthermore, a second solenoid valve and a second water pump are provided on the heat dissipation hole return pipe.

[0008] Furthermore, the heat exchange tank is a horizontally arranged cylindrical canned structure, and a support seat is fixedly arranged at the lower end of the heat exchange tank to support the heat exchange tank through the support seat; a water injection pipe is arranged at the upper end of the heat exchange tank, and a water outlet pipe is arranged at the lower end of the heat exchange tank, and a water outlet valve is arranged on the water outlet pipe.

[0009] Furthermore, the spiral axis of the flue spiral tube coincides with the axis of the heat exchange tank, the inlet and outlet at both ends of the flue spiral tube are respectively fixed on the side walls of the heat exchange tank and extend to the outside of the side walls, and the end of the flue output pipe away from the coke oven is fixedly connected to the inlet of the flue spiral tube.

[0010] Furthermore, the hot water inlet pipe is fixedly installed on the side wall of the heat exchange tank close to the coke oven, and the hot water outlet pipe is fixedly installed on the side wall of the heat exchange tank close to the heat exchanger. Both the hot water inlet pipe and the hot water outlet pipe are connected to the inside of the heat exchange tank.

[0011] Furthermore, a third solenoid valve is provided on the hot water transition pipe.

[0012] Furthermore, a heating water reflux pipe is provided at the heating water inlet of the heat exchanger, and a heating water output pipe is provided at the heating water outlet of the heat exchanger.

[0013] Furthermore, the conveying mechanism includes a motor and a spiral blade; the motor is fixedly arranged at the center of the outer side surface of the heat exchange tank facing the coke oven through a motor seat, the output shaft of the motor is kept coincident with the axis of the heat exchange tank, and the output shaft of the motor extends into the interior of the heat exchange tank.

[0014] Furthermore, the spiral blade is arranged inside the heat exchange tank, the rotating shaft of the spiral blade is kept coincident with the axis of the heat exchange tank, the outer edge of the spiral blade is close to the flue spiral tube, one end of the rotating shaft of the spiral blade is rotatably connected to the side wall of the heat exchange tank close to the heat exchanger, and the other end of the rotating shaft of the spiral blade is fixedly connected to the output shaft of the motor through a coupling.

[0015] The beneficial effects of the utility model compared with the prior art are:

[0016] The utility model provides a waste heat utilization system for a coke oven, which can not only heat the hot water through the heat dissipation holes of the coke oven, thereby utilizing the waste heat in the heat dissipation holes; it can also introduce the high-temperature flue gas in the flue of the coke oven into the spiral tube of the flue, and the high-temperature flue gas in the spiral tube of the flue is heat-exchanged and heated with the hot water in the heat exchange tank, thereby utilizing the waste heat in the flue, thereby realizing the simultaneous utilization of the waste heat in the flue and the heat dissipation holes by one device, without the need to arrange other additional devices, thereby reducing the cost of waste heat utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of the utility model Figure 2 ;

[0020] Figure 3 It is a schematic diagram of the structure of the heat exchange tank after half-section;

[0021] Figure 4 Yes Figure 3 The schematic diagram of the structure of the flue spiral tube after half-section;

[0022] Among them, 1 is a heat exchange tank, 2 is a heat exchanger, 3 is a heat dissipation hole output pipe, 4 is a heat dissipation hole return pipe, 5 is a flue output pipe, 6 is a first solenoid valve, 7 is a first water pump, 8 is a second solenoid valve, 9 is a second water pump, 10 is a water injection pipe, 11 is a water outlet pipe, 12 is a flue spiral pipe, 13 is a hot water inlet pipe, 14 is a hot water outlet pipe, 15 is a hot water transition pipe, 16 is a third solenoid valve, 17 is a heating water return pipe, 18 is a heating water output pipe, 19 is a motor, and 20 is a spiral blade. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0024] like Figure 1 As shown in FIG. 4 , the utility model provides a waste heat utilization system for a coke oven, comprising a heat exchanger 2, a heat exchange tank 1, a heat dissipation hole output pipe 3, a heat dissipation hole return pipe 4, a hot water exchange water transition pipe 15, a flue output pipe 5, a flue spiral pipe 12, and a conveying mechanism.

[0025] The heat dissipation hole output pipe 3 is arranged at the heat dissipation hole on one side of the coke oven, and the heat dissipation hole return pipe 4 is arranged at the heat dissipation hole on the other side of the coke oven. A first solenoid valve 6 and a first water pump 7 are arranged on the heat dissipation hole output pipe 3, and a second solenoid valve 8 and a second water pump 9 are arranged on the heat dissipation hole return pipe 4.

[0026] One end of the flue output pipe 5 is connected to the flue outlet of the coke oven.

[0027] The heat exchanger 2 is arranged at one side of the coke oven, and the heat exchange tank 1 is arranged between the coke oven and the heat exchanger 2 .

[0028] The heat exchange tank 1 is a horizontally arranged cylindrical canned structure, and a support base is fixedly arranged at the lower end of the heat exchange tank 1 to support the heat exchange tank 1. A water injection pipe 10 is arranged at the upper end of the heat exchange tank 1, and a water outlet pipe 11 is arranged at the lower end of the heat exchange tank 1, and a water outlet valve is arranged on the water outlet pipe 11.

[0029] A spiral flue spiral tube 12 is provided on the inner side surface of the heat exchange tank 1, and the spiral axis of the flue spiral tube 12 coincides with the axis of the heat exchange tank 1. The inlet and outlet at both ends of the flue spiral tube 12 are respectively fixed on the side walls at both ends of the heat exchange tank 1 and extend to the outside of the side walls at both ends. The end of the flue output pipe 5 away from the coke oven is fixedly connected to the inlet of the flue spiral tube 12.

[0030] A hot water inlet pipe 13 is fixedly arranged on the side wall of the heat exchange tank 1 close to the coke oven, and a hot water outlet pipe 14 is fixedly arranged on the side wall of the heat exchange tank 1 close to the heat exchanger 2. The hot water inlet pipe 13 and the hot water outlet pipe 14 are both connected to the inside of the heat exchange tank 1. The end of the heat dissipation hole output pipe 3 away from the coke oven is connected to the hot water inlet pipe 13. The hot water outlet pipe 14 is connected to one end of the hot water transition pipe 15, and the other end of the hot water transition pipe 15 is connected to the medium inlet of the heat exchanger 2. The end of the heat dissipation hole return pipe 4 away from the coke oven is connected to the medium outlet of the heat exchanger 2, and a third solenoid valve 16 is arranged on the hot water transition pipe 15.

[0031] A heating water return pipe 17 is provided at the heating water inlet of the heat exchanger 2 , and a heating water output pipe 18 is provided at the heating water outlet of the heat exchanger 2 .

[0032] The transmission mechanism includes a motor 19 and a spiral blade 20. The motor 19 is fixedly arranged at the center of the outer side of the heat exchange tank 1 facing the coke oven through a motor 19 seat, and the output shaft of the motor 19 coincides with the axis of the heat exchange tank 1, and the output shaft of the motor 19 extends into the interior of the heat exchange tank 1. The spiral blade 20 is arranged inside the heat exchange tank 1, and the rotating shaft of the spiral blade 20 coincides with the axis of the heat exchange tank 1. The outer edge of the spiral blade 20 is close to the flue spiral tube 12, and one end of the rotating shaft of the spiral blade 20 is rotatably connected to the side wall of the heat exchange tank 1 close to the heat exchanger 2. The other end of the rotating shaft of the spiral blade 20 is fixedly connected to the output shaft of the motor 19 through a coupling, and the spiral blade 20 is driven by the motor 19 to rotate inside the heat exchange tank 1.

[0033] The working principle of the utility model is:

[0034] During the initial operation, the first solenoid valve 6 , the second solenoid valve 8 , and the third solenoid valve 16 are controlled to be closed, and the heat exchange tank 1 is filled with hot water through the water injection pipe 10 .

[0035] Then the first solenoid valve 6, the second solenoid valve 8 and the third solenoid valve 16 are controlled to open, the first water pump 7, the second water pump 9 and the motor 19 start working, the motor 19 drives the spiral blade 20 to start rotating, and the spiral blade 20 drives the hot water to flow toward the hot water outlet pipe 14 of the heat exchange tank 1, and the hot water inside the heat exchange tank 1 enters the heat exchanger 2 through the hot water outlet pipe 14 and the hot water transition pipe 15, and then flows back from the inside of the heat exchanger 2 through the heat dissipation hole return pipe 4 and the second water pump 9 to the heat dissipation hole of the coke oven, and the hot water is heated by the waste heat inside the heat dissipation hole. The heated hot water re-enters the heat exchange tank 1 through the heat dissipation hole output pipe 3 and the first water pump 7, so that the initially injected hot water is initially circulated to obtain the initial temperature.

[0036] During the initial cycle, the heat exchange water is continuously added to the heat exchange tank 1 through the water injection pipe 10 to ensure that the heat exchange water in the heat exchange tank 1 is always kept full.

[0037] After the hot water after the initial circulation enters the heat exchange tank 1, the high-temperature flue gas output from the flue of the coke oven enters the flue spiral tube 12 through the flue output pipe 5. Since the interior of the flue spiral tube 12 is designed to be spirally shaped, the high-temperature flue gas can flow in the flue spiral tube 12 inside the heat exchange tank 1 for a relatively long time. The spiral blades 20 drive the hot water to flow toward the side of the hot water outlet pipe 14 of the heat exchange tank 1. During the flow, the hot water exchanges heat with the high-temperature flue gas in the flue spiral tube 12. The heat in the high-temperature flue gas is transferred to the inside of the hot water, thereby increasing the temperature of the hot water inside the heat exchange tank 1 again.

[0038] The hot water in the heat exchange tank 1 enters the heat exchanger 2 through the hot water outlet pipe 14 and the hot water transition pipe 15, and the lower temperature heating water enters the heat exchanger 2 through the heating water return pipe 17. The higher temperature hot water exchanges heat with the lower temperature heating water in the heat exchanger 2, thereby increasing the temperature of the heating water. The increased temperature heating water is output to the outside through the heating water output pipe 18 for heating operation. The temperature of the hot water after heat exchange is reduced, and then it flows back from the inside of the heat exchanger 2 through the heat dissipation hole return pipe 4 and the second water pump 9 to the heat dissipation hole of the coke oven. The hot water is heated again by the waste heat in the heat dissipation hole. The heated hot water re-enters the heat exchange tank 1 through the heat dissipation hole output pipe 3 and the first water pump 7, and the above cycle is repeated.

[0039] Through the above process, the waste heat from the flue and heat dissipation holes of the coke oven can be reused for heating, thereby improving the utilization rate of the waste heat of the coke oven.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A waste heat utilization system for a coke oven, characterized in that: The invention comprises a heat exchanger (2), a heat exchange tank (1), a heat dissipation hole output pipe (3), a heat dissipation hole return pipe (4), a heat exchange water transition pipe (15), a flue output pipe (5), a flue spiral pipe (12), and a transmission mechanism; the heat dissipation hole output pipe (3) is arranged at the heat dissipation hole on one side of the coke oven, the heat dissipation hole return pipe (4) is arranged at the heat dissipation hole on the other side of the coke oven, one end of the flue output pipe (5) is connected to the flue outlet of the coke oven, the heat exchanger (2) is arranged at one side of the coke oven, the heat exchange tank (1) is arranged between the coke oven and the heat exchanger, and the heat exchanger (2) is arranged at one side of the coke oven. A spiral flue spiral tube (12) is arranged on the inner side of the heat exchange tank (1), and the flue output pipe (5) is connected to the flue spiral tube (12); a transmission mechanism is arranged inside the heat exchange tank (1), the heat exchange hole output pipe (3) is connected to the hot water inlet pipe (13) of the heat exchange tank (1), the hot water outlet pipe (14) of the heat exchange tank (1) is connected to the medium inlet of the heat exchanger (2) through the hot water transition pipe (15), and the heat exchange hole return pipe (4) is connected to the medium outlet of the heat exchanger (2).

2. A waste heat utilization system for a coke oven according to claim 1, characterized in that: A first solenoid valve (6) and a first water pump (7) are provided on the heat dissipation hole output pipe (3).

3. A waste heat utilization system for a coke oven according to claim 1, characterized in that: A second solenoid valve (8) and a second water pump (9) are provided on the heat dissipation hole return pipe (4).

4. A waste heat utilization system for a coke oven according to claim 1, characterized in that: The heat exchange tank (1) is a horizontally arranged cylindrical tank structure. A support seat is fixedly arranged at the lower end of the heat exchange tank (1), and the heat exchange tank (1) is supported by the support seat. A water injection pipe (10) is arranged at the upper end of the heat exchange tank (1), and a water outlet pipe (11) is arranged at the lower end of the heat exchange tank (1). A water outlet valve is arranged on the water outlet pipe (11).

5. The waste heat utilization system for coke oven according to claim 1, characterized in that: The spiral axis of the flue spiral tube (12) coincides with the axis of the heat exchange tank (1); the inlet and outlet at both ends of the flue spiral tube (12) are respectively fixed to the side walls at both ends of the heat exchange tank (1) and extend to the outside of the side walls at both ends; the end of the flue outlet pipe (5) away from the coke oven is fixedly connected to the inlet of the flue spiral tube (12).

6. A waste heat utilization system for a coke oven according to claim 1, characterized in that: The hot water inlet pipe (13) is fixedly arranged on a side wall of the heat exchange tank (1) close to the coke oven, and the hot water outlet pipe (14) is fixedly arranged on a side wall of the heat exchange tank (1) close to the heat exchanger (2). Both the hot water inlet pipe (13) and the hot water outlet pipe (14) are connected to the interior of the heat exchange tank (1).

7. A waste heat utilization system for a coke oven according to claim 1, characterized in that: A third solenoid valve (16) is provided on the hot water transition pipe (15).

8. A waste heat utilization system for a coke oven according to claim 1, characterized in that: A heating water return pipe (17) is provided at the heating water inlet of the heat exchanger (2), and a heating water output pipe (18) is provided at the heating water outlet of the heat exchanger (2).

9. A waste heat utilization system for a coke oven according to claim 1, characterized in that: The conveying mechanism comprises a motor (19) and a spiral blade (20); the motor (19) is fixedly arranged at the center of the outer side surface of the heat exchange tank (1) facing the coke oven through a motor (19) seat, the output shaft of the motor (19) and the axis of the heat exchange tank (1) remain coincident, and the output shaft of the motor (19) extends into the interior of the heat exchange tank (1).

10. A waste heat utilization system for a coke oven according to claim 9, characterized in that: The spiral blade (20) is arranged inside the heat exchange tank (1), the rotating shaft of the spiral blade (20) is kept coincident with the axis of the heat exchange tank (1), the outer edge of the spiral blade (20) is close to the flue spiral tube (12), one end of the rotating shaft of the spiral blade (20) is rotatably connected to a side wall of the heat exchange tank (1) close to the heat exchanger (2), and the other end of the rotating shaft of the spiral blade (20) is fixedly connected to the output shaft of the motor (19) via a coupling.

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