Waste heat recovery device of dry quenching boiler

Abstract

The utility model relates to the field of waste heat recovery, in particular to a dry quenching boiler waste heat recovery device which comprises a heat preservation shell, a water inlet pipe is installed on the outer wall of the top of the heat preservation shell, a first exchange assembly and a second exchange assembly are installed on the inner wall of the heat preservation shell, and a water drainage pipe is connected to the outer wall of the bottom of the heat preservation shell. A valve is mounted in the drainage pipe; the first exchange assembly comprises two concentration pipes, heat conduction pipes connected between the concentration pipes at equal intervals and heat conduction pieces welded to the outer walls of the heat conduction pipes at equal intervals. The second exchange assembly comprises two annular pipes, water pipes connected to the outer wall between the annular pipes at equal intervals, installation pipes connected to the outer walls of the annular pipes and filter boxes installed at one ends of the installation pipes. Heat is transmitted into oil in the heat preservation shell through the heat conduction pieces on the outer walls of the heat conduction pipes, so that the temperature of the oil is increased, heat exchange of liquid needing to be heated is facilitated, and energy conservation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a waste heat recovery device for a dry quenching coke boiler. Background Technology

[0002] At present, the deoxygenation process of feedwater in some dry quenching waste heat boilers in China is a combination of thermal deoxygenation and chemical deoxygenation. The specific process is as follows: the boiler feedwater first passes through the heat pipe heat exchange device in the circulating flue to absorb part of the waste heat of the flue gas and then enters the thermal deoxygenation equipment. A large amount of steam is introduced to heat the feedwater to 105°C to complete the preliminary deoxygenation. After the preliminary deoxygenation is completed, chemical deoxygenation agents are introduced after the thermal deoxygenation water tank for deep deoxygenation. Finally, the dissolved oxygen in the boiler feedwater is ≤7μg / L, which meets the production requirements.

[0003] The exhaust gas still contains a lot of heat after the whole process. If this heat is not utilized, it will waste some heat resources. Utilizing this heat can save heating resources and reduce energy consumption. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems and shortcomings by proposing a waste heat recovery device for dry quenching coke boilers: the liquid to be heated enters the filter box and is intercepted and filtered through the filter media and filter holes in the pull-out bucket, and then enters the annular pipe and water pipe through the installation pipe. The liquid to be heated absorbs heat through the heat-conducting plate in the water pipe, which facilitates heat exchange, is easy to use, and helps reduce energy consumption, thus solving the problem of heat loss from exhaust gas.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A waste heat recovery device for a dry quenching coke boiler includes an insulation shell. A water inlet pipe is installed on the top outer wall of the insulation shell, and an exchange component one and an exchange component two are respectively installed on the inner wall of the insulation shell. A drain pipe is connected to the bottom outer wall of the insulation shell, and a valve is installed in the drain pipe. The exchange component one includes two central pipes, heat-conducting pipes connected at equal intervals between the central pipes, and heat-conducting plates welded at equal intervals to the outer wall of the heat-conducting pipes. The exchange component two includes two annular pipes, water pipes connected at equal intervals between the annular pipes on their outer walls, an installation pipe connected to the outer wall of the annular pipes, and a filter box installed at one end of the installation pipe.

[0007] According to the above scheme: after the liquid to be heated enters the filter box, it is intercepted and filtered by the filter media and filter holes in the pull-out bucket, and then enters the ring pipe and water pipe through the installation pipe. The liquid to be heated absorbs heat through the heat-conducting plate in the water pipe, which facilitates heat exchange, makes it easy to use, and helps reduce energy consumption.

[0008] Preferably, a water pump is installed on the top outer wall of the insulation shell, and the input end of the water pump is connected to the other end of the installation pipe.

[0009] Preferably, the water pipes on the inner wall of the insulation shell are equipped with heat-conducting plates that are evenly distributed, and a pull-out bucket is slidably connected to one side of the inner wall of the filter box.

[0010] Preferably, the inside of the pull-out bucket contains filter media, and one side of the outer wall of the pull-out bucket is installed on the outer wall of the filter box, and one end of the outer wall of the pull-out bucket is connected to an extension tube.

[0011] Preferably, a fan is installed at the center of the top outer wall of the insulation shell, and a connecting pipe is connected to the center of the central pipe, with the input end of the fan connected to the connecting pipe.

[0012] According to the above scheme, heat is transferred to the oil inside the insulation shell through the heat-conducting fins on the outer wall of the heat pipe, causing the oil temperature to rise, which facilitates heat exchange with the liquid that needs to be heated and saves energy.

[0013] Preferably, the outer wall of the other end of the pull-out bucket is provided with filter holes that are evenly distributed, and the bottom outer wall of the heat insulation shell is provided with support legs that are evenly distributed.

[0014] Preferably, the fan and water pump are connected to a switch via wires, and the switch is connected to a power source via wires.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. After the liquid to be heated enters the filter box, it is intercepted and filtered by the filter media and filter holes in the pull-out bucket. It then enters the ring pipe and water pipe through the installation pipe. The liquid to be heated absorbs heat through the heat-conducting plate in the water pipe, which facilitates heat exchange, makes it easy to use, and helps reduce energy consumption.

[0017] 2. Heat is transferred through the heat-conducting fins on the outer wall of the heat pipe to the oil inside the insulation shell, causing the oil temperature to rise, which facilitates heat exchange with the liquid that needs to be heated and saves energy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of a waste heat recovery device for a dry quenching coke boiler proposed in this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of a waste heat recovery device for a dry quenching coke boiler proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the annular pipe structure of a waste heat recovery device for a dry quenching coke boiler proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the overall structure of a waste heat recovery device for a dry quenching coke boiler proposed in this utility model.

[0022] In the diagram: 1 Insulation shell, 2 Water inlet pipe, 3 Drain pipe, 4 Valve, 5 Exchange component one, 6 Exchange component two, 7 Central pipe, 8 Heat conduction pipe, 9 Heat conduction plate, 10 Connecting pipe, 11 Fan, 12 Ring pipe, 13 Water pipe, 14 Heat conduction plate, 15 Installation pipe, 16 Filter box, 17 Pull-out bucket, 18 Water pump. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1:

[0025] Reference Figure 1-4 A waste heat recovery device for a dry quenching coke boiler includes an insulation shell 1, an inlet pipe 2 installed on the top outer wall of the insulation shell 1, and an exchange component 5 and an exchange component 6 respectively installed on the inner wall of the insulation shell 1. A drain pipe 3 is connected to the bottom outer wall of the insulation shell 1, and a valve 4 is installed in the drain pipe 3. The insulation shell 1 has heat preservation capabilities. The heat of the flue gas is absorbed by the oil and stored in the insulation shell 1, reducing the heat loss rate and facilitating heat storage. Oil is added to the inside of the insulation shell 1 through the inlet pipe 2, and the oil is discharged through the drain pipe 3 by opening the valve 4.

[0026] The second exchange component 6 includes two annular pipes 12, water pipes 13 connected at equal intervals to the outer walls of the annular pipes 12, an installation pipe 15 connected to the outer walls of the annular pipes 12, and a filter box 16 installed at one end of the installation pipe 15.

[0027] A water pump 18 is installed on the top outer wall of the insulation shell 1, and the input end of the water pump 18 is connected to the other end of the mounting pipe 15.

[0028] The water pipe 13 on the inner wall of the heat insulation shell 1 is equipped with heat-conducting plates 14 that are evenly distributed on the outer wall, and a pull-out bucket 17 is slidably connected to one side of the inner wall of the filter box 16. The filter material in the pull-out bucket 17 in the filter box 16 filters the liquid that passes through, so as to prevent impurities in the liquid from clogging the water pipe 13 and making it easy to use.

[0029] The inside of the pull-out bucket 17 is filled with filter media, and one side of the outer wall of the pull-out bucket 17 is installed on the outer wall of the filter box 16. One end of the outer wall of the pull-out bucket 17 is connected to an extension pipe, which allows liquid to enter the filter box 16, water pipe 13 and heat conduction plate 14, so that the temperature of the oil is transferred to the liquid through the heat conduction plate 14, which facilitates heat exchange and energy saving.

[0030] The outer wall of the other end of the pull-out bucket 17 is provided with filter holes that are evenly distributed, and the bottom outer wall of the insulation shell 1 is provided with support legs that are evenly distributed.

[0031] Example 2:

[0032] Reference Figure 1-2 The heat exchange component 5 includes two central pipes 7, heat-conducting pipes 8 connected at equal distances between the central pipes 7, and heat-conducting plates 9 welded at equal distances to the outer wall of the heat-conducting pipes 8. The fan 11 draws out the exhaust gas. The exhaust gas exchanges its own temperature with the oil inside the insulation shell 1 by passing through the heat-conducting pipes 8 and the heat-conducting plates 9, so that the oil temperature rises, which facilitates heat exchange and energy saving.

[0033] A fan 11 is installed at the center of the top outer wall of the insulation shell 1, and a connecting pipe 10 is connected to the center of the central pipe 7. The input end of the fan 11 is connected to the connecting pipe 10, and the heat is transferred to the oil inside the insulation shell 1 through the heat-conducting plate 9 on the outer wall of the heat-conducting pipe 8, so that the oil temperature rises, which facilitates heat exchange for the liquid that needs to be heated and facilitates energy saving.

[0034] The fan 11 and the water pump 18 are connected to a switch via wires, and the switch is connected to a power source via wires.

[0035] Working principle: In use, the other end of the extension tube at one end of the filter box 16 is connected to the liquid. The liquid to be heated enters the filter box 16 through the extension tube. Oil is added to the inside of the insulation shell 1 through the water inlet pipe 2. After entering the filter box 16, the liquid to be heated is filtered by the filter material and filter holes in the pull-out bucket 17. Then, the liquid to be heated enters the annular pipe 12 and water pipe 13 through the installation pipe 15. The liquid to be heated absorbs heat into the heat-conducting plate 14 inside the water pipe 13. The temperature in the oil transfers heat to the liquid to be heated. The water pump 18 draws out the liquid to be heated, completing the heating of the liquid to be heated, which facilitates the reuse of waste heat and energy saving. The flue gas enters the central pipe 7 through the connecting pipe 10 and is dispersed in the heat-conducting pipes 8 between the central pipes 7. The heat of the flue gas is transferred to the oil inside the insulation shell 1 through the heat-conducting fins 9 on the outer wall of the heat-conducting pipes 8, which raises the temperature of the oil and facilitates heat exchange for the liquid to be heated, which is energy saving.

[0036] The exemplary embodiments of the present invention have been described in detail herein with reference to examples. However, those skilled in the art will understand that various modifications and alterations can be made to the specific embodiments described above without departing from the spirit of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention, which is determined by the appended claims. The foregoing description of specific exemplary embodiments of the present invention is not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A dry quenching boiler waste heat recovery device comprising an insulating shell (1), characterized in that, The top outer wall of the heat preservation shell (1) is provided with a water inlet pipe (2), and the inner wall of the heat preservation shell (1) is respectively provided with an exchange assembly one (5) and an exchange assembly two (6), the bottom outer wall of the heat preservation shell (1) is connected with a drain pipe (3), and the drain pipe (3) is provided with a valve (4); The exchange assembly one (5) comprises two concentrating pipes (7), heat conducting pipes (8) connected at equal distances between the concentrating pipes (7), and heat conducting fins (9) welded at equal distances on the outer wall of the heat conducting pipes (8); The exchange assembly two (6) comprises two annular pipes (12), water pipes (13) connected at equal distances on the outer wall between the annular pipes (12), mounting pipes (15) connected on the outer wall of the annular pipes (12), and filter boxes (16) mounted on one end of the mounting pipes (15).

2. A dry quenching boiler waste heat recovery device according to claim 1, characterized in that The top outer wall of the heat preservation shell (1) is provided with a water pump (18), and the input end of the water pump (18) is connected with the other end of the mounting pipe (15).

3. A dry quenching boiler waste heat recovery device according to claim 1, characterized in that The outer wall of the water pipe (13) of the inner wall of the heat preservation shell (1) is provided with heat conducting plates (14) distributed at equal distances, and the inner wall of one side of the filter box (16) is slidingly connected with a pullout bucket (17).

4. A dry quenching boiler waste heat recovery device according to claim 3, characterized in that The pullout bucket (17) is provided with filter materials inside, and the outer wall of one side of the pullout bucket (17) is mounted on the outer wall of the filter box (16), and the outer wall of one end of the pullout bucket (17) is connected with an extension pipe.

5. A dry quenching boiler waste heat recovery device according to claim 1, characterized in that The center of the top outer wall of the heat preservation shell (1) is provided with a fan (11), and the center of the concentrating pipe (7) is connected with a connecting pipe (10), and the input end of the fan (11) is connected with the connecting pipe (10).

6. A dry quenching boiler waste heat recovery device according to claim 3, characterized in that The other end of the pullout bucket (17) is provided with filter holes distributed at equal distances, and the bottom outer wall of the heat preservation shell (1) is provided with support legs distributed at equal distances.

7. A dry quenching boiler waste heat recovery device according to claim 5, characterized in that The fan (11) and the water pump (18) are connected with a switch through wires, and the switch is connected with a power supply through wires.

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