Lime kiln waste heat energy utilization device

Abstract

The utility model discloses a lime kiln waste heat energy utilization device, which relates to the technical field of waste heat recovery and comprises a ventilation pipe, a plurality of first partition plates are fixedly connected in an array in the ventilation pipe and divide the ventilation pipe into a plurality of ventilation channels, and second partition plates are fixedly connected to the middles of the ventilation channels. The ventilation channel is divided into a gas-gas heat exchange channel and a gas-liquid heat exchange channel through the second partition plate, gas heat exchange pipes are fixedly connected into the gas-gas heat exchange channel, liquid heat exchange pipes are fixedly connected into the gas-liquid heat exchange channel, and the liquid heat exchange pipes and the gas heat exchange pipes are arranged in a staggered mode. The bottom end of the second partition plate is rotationally connected with flow guide plates, the multiple flow guide plates are driven by a driving mechanism to synchronously swing to be used for guiding high-temperature flue gas, and the width of the flow guide plates is larger than the distance between the first partition plate and the second partition plate. According to the lime kiln waste heat energy utilization device, heating objects can be flexibly switched, and the arrangement cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a device for utilizing the waste heat energy of a lime kiln. Background Technique

[0002] In the field of preheating and utilization of lime kiln flue gas, a common practice is to directly preheat the air supplied to the lime kiln through the waste heat of the flue gas to improve the thermal efficiency of the combustion process and reduce energy consumption. Another way is to indirectly recover the waste heat in the flue gas by using a water circulation system for producing hot water, heating or other scenarios with heat energy requirements.

[0003] Current flue gas waste heat recovery devices often only focus on separately heating air or water, lacking the ability to flexibly switch the heating object according to actual needs. Although there is a solution of using two types of waste heat recovery devices in series, this approach significantly increases the layout and operation and maintenance costs.

[0004] Therefore, it is very necessary to propose a device for utilizing the waste heat energy of a lime kiln to solve the above problems. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] The purpose of the utility model is to provide a device for utilizing the waste heat energy of a lime kiln that can flexibly switch the heating object and has a low layout cost, so as to solve the problems put forward in the above background technique.

[0007] (II) Technical Solution

[0008] To achieve the above purpose, the utility model is realized through the following technical solutions: A device for utilizing the waste heat energy of a lime kiln includes a ventilation pipe. A plurality of first partitions are fixedly connected in an array inside the ventilation pipe. The plurality of first partitions divide the ventilation pipe into several ventilation channels. A second partition is fixedly connected in the middle of the ventilation channel. The second partition divides the ventilation channel into a gas-gas heat exchange channel and a gas-liquid heat exchange channel. A gas heat exchange pipe is fixedly connected in the gas-gas heat exchange channel. A liquid heat exchange pipe is fixedly connected in the gas-liquid heat exchange channel. The plurality of liquid heat exchange pipes and gas heat exchange pipes are arranged in a staggered manner. A guide plate is rotatably connected to the bottom end of the second partition. The plurality of guide plates are driven by a driving mechanism to swing synchronously for guiding the high-temperature flue gas. The width of the guide plate is greater than the distance between the first partition and the second partition.

[0009] Preferably, the driving mechanism includes an adjusting rod, a connecting plate and an electric push rod. A U-shaped hole is opened in the middle of the connecting plate. An annular groove is opened on the outer side of the adjusting rod. The adjusting rod is inserted into the connecting plate. The connecting plate is rotatably connected to the bottom end of the guide plate. The adjusting rod penetrates through the ventilation pipe and is driven to be slidably connected by the electric push rod.

[0010] Preferably, the first partition plate and the second partition plate are parallel to each other, and the height of the first partition plate is greater than the height of the second partition plate.

[0011] Preferably, the liquid heat exchange tube is an S-shaped heat exchange tube, and both ends of the liquid heat exchange tube penetrate through the ventilation pipe and are connected with a liquid delivery pipe.

[0012] Preferably, the gas heat exchange tube is a flat tube, and both ends of the gas heat exchange tube penetrate through the ventilation pipe and are connected with a gas delivery pipe.

[0013] Preferably, a flow guide cover is fixedly connected to the bottom end of the ventilation pipe.

[0014] Preferably, heat exchange fins are fixedly connected to the outer sides of the liquid heat exchange tube and the gas heat exchange tube.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a device for utilizing the waste heat of a lime kiln, which has the following beneficial effects:

[0017] 1. For the device for utilizing the waste heat of the lime kiln, by arranging the first partition plate and the second partition plate to divide the ventilation pipe into a gas-gas heat exchange channel and a gas-liquid heat exchange channel, and arranging the gas heat exchange tube and the liquid heat exchange tube therein respectively, and controlling the flow direction of the high-temperature flue gas through the flow guide plate, it can preheat the air or heat the water, or preheat the air and heat the water simultaneously to meet different requirements. At the same time, its structure is simple, reducing the layout and operation and maintenance costs.

[0018] 2. For the device for utilizing the waste heat of the lime kiln, by adopting an S-shaped liquid heat exchange tube and a flat tube as the gas heat exchange tube, the heat exchange area is increased and the heat exchange effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of the structure of the utility model;

[0020] Figure 2 is a front sectional view schematic diagram of the ventilation pipe of the utility model;

[0021] Figure 3 is a side sectional view schematic diagram of the ventilation pipe of the utility model;

[0022] Figure 4 is a front view schematic diagram of the connecting plate of the utility model.

[0023] In the figure: 1. Ventilation pipe; 2. Gas delivery pipe; 3. Liquid delivery pipe; 4. Flow guide cover; 5. First partition plate; 6. Liquid heat exchange tube; 7. Second partition plate; 8. Gas heat exchange tube; 9. Flow guide plate; 10. Adjusting rod; 11. Connecting plate; 12. Electric push rod; 13. Annular groove; 14. U-shaped hole. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] Please refer to Figures 1-4 As shown, a device for utilizing the waste heat of a lime kiln includes a ventilation pipe 1. A plurality of first partitions 5 are fixedly connected in an array inside the ventilation pipe 1. The plurality of first partitions 5 divide the ventilation pipe 1 into several ventilation channels. A second partition 7 is fixedly connected in the middle of the ventilation channel. The second partition 7 divides the ventilation channel into a gas-gas heat exchange channel and a gas-liquid heat exchange channel. A gas heat exchange pipe 8 is fixedly connected in the gas-gas heat exchange channel, and a liquid heat exchange pipe 6 is fixedly connected in the gas-liquid heat exchange channel. A guide plate 9 is rotatably connected to the bottom end of the second partition 7. The guide plate 9 is driven by a driving mechanism to swing for guiding high-temperature flue gas. The width of the guide plate 9 is greater than the distance between the first partition 5 and the second partition 7.

[0026] By fixing the first partition 5 and the second partition 7 in the ventilation pipe 1, dividing it into a gas-gas heat exchange channel and a gas-liquid heat exchange channel, and rotatably connecting a guide plate 9 to the bottom end of the second partition 7, under the action of the guide plate 9, the high-temperature flue gas is guided into the gas-gas heat exchange channel or the gas-liquid heat exchange channel, so as to heat the gas or liquid according to needs, or heat the gas and the liquid at the same time.

[0027] In some embodiments, the driving mechanism includes an adjusting rod 10, a connecting plate 11 and an electric push rod 12. A U-shaped hole 14 is formed in the middle of the connecting plate 11. An annular groove 13 is formed on the outer side of the adjusting rod 10. The adjusting rod 10 is inserted into the connecting plate 11. The connecting plate 11 is rotatably connected to the bottom end of the guide plate 9. The adjusting rod 10 penetrates through the ventilation pipe 1 and is driven to be slidably connected by the electric push rod 12. The electric push rod 12 is fixedly connected to the outer side of the ventilation pipe 1. Preferably, the width of the annular groove 13 is slightly larger than the thickness of the connecting plate 11, so that the adjusting rod 10 and the connecting plate 11 can slide relative to each other. Specifically, the first partition 5 and the second partition 7 are parallel to each other, and the height of the first partition 5 is greater than the height of the second partition 7.

[0028] When it is necessary to adjust the guide plate 9 to change the drainage direction, start the electric push rod 12 to drive the adjusting rod 10 to slide. The adjusting rod 10 drives the guide plate 9 to rotate through the connecting plate 11. During this process, the connecting plate 11 moves in the vertical direction. The adjusting rod 10 slides in the U-shaped hole 14 of the connecting plate 11. Since the connecting plate 11 is limited by the annular groove 13, the connecting plate 11 can maintain a vertical state, so that it fits against the side wall of the first partition 5. The connecting plate 11 close to the inner wall of the ventilation pipe 1 fits against the inner wall of the ventilation pipe 1, reducing the gap and ensuring the drainage effect.

[0029] In some embodiments, in order to increase the heat exchange area and the residence time of the liquid in the ventilation pipe 1 and improve the heating effect, the liquid heat exchange pipe 6 is an S-shaped heat exchange pipe, and both ends of the liquid heat exchange pipe 6 penetrate through the ventilation pipe 1 and are connected with a liquid delivery pipe 3. Preferably, the liquid inlet end of the liquid heat exchange pipe 6 is located at the upper end of the ventilation pipe 1, and the liquid outlet end of the liquid heat exchange pipe 6 is located at the lower end of the ventilation pipe 1.

[0030] In some embodiments, in order to increase the heat exchange area, the gas heat exchange pipe 8 is a flat pipe, and both ends of the gas heat exchange pipe 8 penetrate through the ventilation pipe 1 and are connected with a gas delivery pipe 2. By using a flat pipe, it has a larger heat exchange area to improve the heat exchange effect.

[0031] Since the cross-section of the lime kiln chimney is circular, in order to facilitate connection therewith, a flow guide cover 4 is fixedly connected to the bottom end of the ventilation pipe 1.

[0032] In order to further improve the heat exchange efficiency, heat exchange fins are fixedly connected to the outer sides of both the liquid heat exchange pipe 6 and the gas heat exchange pipe 8.

[0033] Working principle: When air needs to be introduced into the lime kiln and the air needs to be preheated, the air is introduced into the gas heat exchange pipe 8 through the gas delivery pipe 2, the electric push rod 12 is started and contracted, and the electric push rod 12 drives the guide plate 9 to rotate to the extreme position through the adjusting rod 10 and the connecting plate 11 to change the smoke flow direction, so that the smoke flows through the gas-gas heat exchange channel, and the high-temperature flue gas exchanges heat with the air through the gas heat exchange pipe 8;

[0034] When water needs to be heated, the water is introduced into the liquid heat exchange pipe 6 through the liquid delivery pipe 3, the electric push rod 12 is started and extended, and the electric push rod 12 drives the guide plate 9 to rotate to the other extreme position through the adjusting rod 10 and the connecting plate 11 to change the smoke flow direction, so that the smoke flows through the gas-liquid heat exchange channel, and the high-temperature flue gas exchanges heat with the water through the liquid heat exchange pipe 6;

[0035] When it is necessary to heat both air and water at the same time, the electric push rod 12 is started, and the connecting plate 11 is driven to move to the middle of the ventilation channel through the adjusting rod 10. At this time, the high-temperature flue gas can enter the gas-gas heat exchange channel and the gas-liquid heat exchange channel respectively to heat the gas and the liquid.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for utilizing waste heat from a lime kiln, comprising a ventilation pipe (1), characterized in that: A plurality of first baffles (5) are fixedly connected to the internal array of the ventilation pipe (1), and the plurality of first baffles (5) divide the ventilation pipe (1) into a plurality of ventilation channels. A second baffle (7) is fixedly connected to the middle of the ventilation channel, and the second baffle (7) divides the ventilation channel into an air-to-air heat exchange channel and an air-to-liquid heat exchange channel. A gas heat exchange pipe (8) is fixedly connected to the air-to-air heat exchange channel, and a liquid heat exchange pipe (6) is fixedly connected to the air-to-liquid heat exchange channel. The plurality of liquid heat exchange pipes (6) and gas heat exchange pipes (8) are arranged in a staggered manner. A guide plate (9) is rotatably connected to the bottom end of the second baffle (7), and the plurality of guide plates (9) are driven by a driving mechanism to swing synchronously for guiding high-temperature flue gas. The width of the guide plate (9) is greater than the spacing between the first baffle (5) and the second baffle (7).

2. A lime kiln waste heat energy utilization device according to claim 1, characterized in that: The driving mechanism comprises an adjusting rod (10), a connecting plate (11) and an electric push rod (12); a U-shaped hole (14) is provided in the middle of the connecting plate (11); an annular groove (13) is provided on the outer side of the adjusting rod (10); the adjusting rod (10) is plugged into the connecting plate (11); the connecting plate (11) is rotatably connected to the bottom end of the guide plate (9); the adjusting rod (10) passes through the ventilation pipe (1) and is driven by the electric push rod (12) to be slidably connected.

3. The device for utilizing waste heat from a lime kiln according to claim 1, characterized in that: The first partition plate (5) and the second partition plate (7) are parallel to each other, and the height of the first partition plate (5) is greater than the height of the second partition plate (7).

4. The device for utilizing waste heat from a lime kiln according to claim 1, characterized in that: The liquid heat exchange tube (6) is an S-shaped heat exchange tube, and both ends of the liquid heat exchange tube (6) penetrate the ventilation tube (1) and are connected to the liquid infusion tube (3).

5. The device for utilizing waste heat from a lime kiln according to claim 1, characterized in that: The gas heat exchange pipe (8) is a flat pipe, and both ends of the gas heat exchange pipe (8) penetrate the ventilation pipe (1) and are connected to the gas delivery pipe (2).

6. The device for utilizing waste heat from a lime kiln according to claim 1, characterized in that: The bottom end of the ventilation pipe (1) is fixedly connected to a flow guide cover (4).

7. The device for utilizing waste heat from a lime kiln according to claim 1, characterized in that: Heat exchange fins are fixedly connected to the outer sides of the liquid heat exchange tube (6) and the gas heat exchange tube (8).

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