Boiler waste heat recovery device

Abstract

The utility model discloses a boiler waste heat recovery device, which relates to the technical field of boiler waste heat recovery, and comprises a waste heat recovery tank for waste gas waste heat recovery, one side of the waste heat recovery tank is provided with a heat preservation bin, the heat preservation bin is provided with a gas inlet pipe, the heat preservation bin is internally provided with a centrifugal separation bin, and the centrifugal separation bin is provided with a gas outlet pipe. The air inlet pipe is arranged in the tangential direction of the inner wall of the centrifugal separation bin, a conveying pipe is connected to the centrifugal separation bin, the other end of the conveying pipe communicates with the waste heat recovery tank, and a heat exchange assembly is arranged in the waste heat recovery tank. The air inlet pipe is arranged along the tangent line of the inner wall of the centrifugal separation bin, the speed increasing assembly accelerates smoke rotational flow, the spiral guide strip strengthens centrifugal separation, efficient smoke separation is achieved, smoke is collected into the detachable collecting box, meanwhile, the second blade in the conveying pipe is in linkage speed increasing, and the heat exchange pipe in the waste heat recovery tank recovers smoke waste heat. Smoke is purified, waste heat recycling is achieved, and the environment-friendly and energy-saving effects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of boiler waste heat recovery technology, specifically to a boiler waste heat recovery device. Background Technology

[0002] In industrial production, boilers generate a large amount of waste gas carrying residual heat during operation. Direct discharge of this waste gas not only wastes energy but may also have adverse effects on the environment due to pollutants such as smoke and dust in the waste gas.

[0003] Currently, there are some problems with the practical application of waste heat recovery devices for boiler exhaust gas: on the one hand, some devices have low efficiency in separating dust from exhaust gas, which makes subsequent heat exchange components easy to be blocked by dust, affecting the heat exchange effect and the normal operation of the device; on the other hand, the waste heat recovery efficiency of existing devices needs to be improved, and there may be a lot of heat loss in the structural design. At the same time, the collection and treatment of separated dust is not convenient enough, which can easily increase the equipment maintenance cost. Utility Model Content

[0004] The purpose of this invention is to provide a boiler waste heat recovery device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A boiler waste heat recovery device includes a waste heat recovery tank for recovering waste heat from exhaust gas. One side of the waste heat recovery tank is provided with an insulated chamber, and an air inlet pipe is provided on the insulated chamber. A centrifugal separation chamber is located inside the insulated chamber. The air inlet pipe is arranged tangentially to the inner wall of the centrifugal separation chamber. A conveying pipe is connected to the centrifugal separation chamber, and the other end of the conveying pipe is connected to the waste heat recovery tank. A heat exchange component is provided inside the waste heat recovery tank. An acceleration component for increasing the separation speed is provided inside the centrifugal separation chamber. A collection component for collecting the separated flue gas dust is provided at the bottom of the centrifugal separation chamber.

[0007] The above technical solution, by setting up a waste heat recovery tank, an insulated chamber, a centrifugal separation chamber, a conveying pipe, a heat exchange component, an acceleration component, and a collection component, achieves the recovery and utilization of waste heat in boiler exhaust gas, while simultaneously separating and collecting particulate matter in the exhaust gas. Specifically, the inlet pipe is set tangentially along the inner wall of the centrifugal separation chamber, allowing the flue gas to generate centrifugal force upon entering the chamber, thus separating particulate matter from the dust. The centrifugal separation chamber is connected to the waste heat recovery tank via the conveying pipe, and the separated flue gas enters the waste heat recovery tank, where the heat is recovered using the heat exchange component. The acceleration component increases the flow velocity of the flue gas within the centrifugal separation chamber, thereby improving separation efficiency. The collection component collects the separated dust for subsequent processing. The insulated chamber reduces heat loss and ensures that the flue gas maintains a relatively high temperature during the separation process, which is beneficial for waste heat recovery.

[0008] A further improvement of the present invention is that the speed-increasing component includes a rotating shaft, and the rotating shaft is provided with a plurality of blades.

[0009] The above technical solution includes a speed-increasing component comprising a rotating shaft and multiple blades. When flue gas enters and flows tangentially along the inner wall of the centrifugal separation chamber, it drives the rotating shaft and blades to rotate. The rotation of the blades accelerates the flow velocity of the flue gas, increases the intake velocity, and thus enhances the centrifugal separation effect, allowing for more thorough separation of dust and flue gas.

[0010] A further improvement of this utility model is that the lower middle part of the centrifugal separation chamber is provided with multiple spiral-shaped guide bars.

[0011] The above technical solution includes a plurality of spiral guide bars in the lower middle part of the centrifugal separation chamber. The guide bars are spirally arranged on the inner wall of the centrifugal separation chamber, which can guide the flue gas to form a vortex in the centrifugal separation chamber. The formation of the vortex can further enhance the centrifugal force, making it easier for the dust particles to be separated and attached to the inner wall of the centrifugal separation chamber, and finally fall into the collection component at the bottom, thereby improving the efficiency and effect of dust separation.

[0012] A further improvement of this utility model is that: the top end of the rotating shaft extends into the inside of the conveying pipe, and multiple blades are provided on the rotating shaft and inside the conveying pipe.

[0013] In the above-mentioned technical solution, when the separated flue gas flows to the waste heat recovery tank through the conveying pipe, the flue gas will drive the second blade to rotate, which in turn drives the shaft to rotate. This not only increases the intake velocity of the flue gas in the conveying pipe, but also further drives the first blade in the centrifugal separation chamber to rotate through the rotation of the shaft, forming a linkage effect. This continuously enhances the flue gas flow velocity and centrifugal force in the centrifugal separation chamber, ensuring the efficient separation of dust and the conveying of flue gas.

[0014] A further improvement of the present invention is that the collection assembly includes a collection chamber installed at the bottom of the centrifugal separation chamber. The collection chamber is shaped like a bucket, and a discharge pipe is connected to the bottom of the collection chamber. A detachable collection box is connected to the bottom of the discharge pipe.

[0015] The above technical solution features a bucket-shaped collection bin that facilitates the smooth sliding and accumulation of separated dust particles at the bottom. These particles are then discharged into a collection box via a discharge pipe. The collection box is detachable, allowing for timely removal and cleaning when full, ensuring the continuous and effective operation of the collection components and simplifying the handling of the separated dust.

[0016] A further improvement of this utility model is that the bottom of the rotating shaft extends into the discharge pipe, and a dredging strip is provided on the rotating shaft.

[0017] In the above technical solution, when the shaft rotates, the unblocking strip will rotate along with it, creating a stirring effect in the discharge pipe. This can effectively prevent dust from accumulating and clogging in the discharge pipe, ensuring the smooth flow of the discharge pipe, allowing the dust in the collection bin to be discharged smoothly and enter the collection box, ensuring the normal operation of the entire device, and reducing equipment failures caused by discharge pipe blockage.

[0018] A further improvement of the present invention is that the heat exchange assembly includes an inlet pipe and an outlet pipe installed on the waste heat recovery tank, and a plurality of heat exchange pipes are provided between the inlet pipe and the outlet pipe, and the heat exchange pipes are located inside the waste heat recovery tank.

[0019] In this technical solution, the inlet pipe and outlet pipe are used for cold water input and hot water output, respectively. The heat exchange tubes exchange heat with the flue gas inside the waste heat recovery tank. After the separated flue gas enters the waste heat recovery tank, cold water flows from the inlet pipe into the heat exchange tubes, absorbs heat from the flue gas, and is then discharged from the outlet pipe. This process realizes the recovery and utilization of waste heat in boiler exhaust gas, improves energy utilization efficiency, and the recovered hot water can be reused, reducing energy consumption and production costs.

[0020] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0021] 1. This utility model provides a boiler waste heat recovery device. By setting an air inlet pipe along the tangential direction of the inner wall of the centrifugal separation chamber in the heat preservation chamber, the flue gas will generate centrifugal force when it enters. In conjunction with the speed-increasing components (rotating shaft and blade 1) and spiral guide bars in the centrifugal separation chamber, the flue gas swirling can be accelerated and the centrifugal separation effect can be enhanced. The dust particles are efficiently separated to the bottom collection chamber and discharged into the detachable collection box through the discharge pipe. At the same time, the blade 2 extending from the rotating shaft to the conveying pipe can drive the flue gas to flow quickly into the waste heat recovery tank, realizing the efficient separation and conveying of dust and flue gas, avoiding the blockage of the discharge pipe and improving the separation efficiency.

[0022] 2. This utility model provides a boiler waste heat recovery device. The heat exchange components in the waste heat recovery tank can transfer the heat of the separated flue gas to cold water through the inlet pipe, outlet pipe and multiple heat exchange tubes to form recyclable hot water. The heat preservation chamber reduces heat loss to ensure heat exchange efficiency. The whole device not only realizes the recovery and reuse of waste heat from boiler exhaust gas and improves energy utilization, but also purifies the flue gas through centrifugal separation and multi-stage filtration (filter screen in the conveying pipe) to reduce pollutant emissions, thus achieving both energy saving and environmental protection benefits.

[0023] This utility model provides a boiler waste heat recovery device. By setting the air inlet pipe tangentially along the inner wall of the centrifugal separation chamber, accelerating the flue gas swirl with speed-increasing components, and strengthening centrifugal separation with spiral guide bars, it achieves efficient separation of flue gas dust and collects it into a detachable collection box. At the same time, the blades in the conveying pipe are accelerated in two linkages, and the heat exchange tubes in the waste heat recovery tank recover the waste heat of the flue gas. This not only purifies the flue gas but also realizes the reuse of waste heat, achieving both environmental protection and energy-saving effects. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is the left view of the present invention;

[0027] Figure 3 For the present utility model Figure 2 A three-dimensional cross-sectional view of point AA in the middle;

[0028] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0029] In the diagram: 1. Waste heat recovery tank; 2. Insulation chamber; 3. Air inlet pipe; 4. Centrifugal separation chamber; 5. Conveying pipe; 6. Rotating shaft; 7. Blade 1; 8. Guide bar; 9. Blade 2; 10. Collection chamber; 11. Discharge pipe; 12. Collection box; 13. Unclogging strip; 14. Water inlet pipe; 15. Water outlet pipe; 16. Heat exchange tube; 17. Filter screen. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to embodiments:

[0031] Example 1

[0032] like Figures 1-4 As shown, this utility model provides a boiler waste heat recovery device, including a waste heat recovery tank 1 for recovering waste heat from exhaust gas. A heat preservation chamber 2 is provided on one side of the waste heat recovery tank 1, and an air inlet pipe 3 is provided on the heat preservation chamber 2. A centrifugal separation chamber 4 is provided inside the heat preservation chamber 2. The air inlet pipe 3 is arranged tangentially along the inner wall of the centrifugal separation chamber 4. A conveying pipe 5 is connected to the centrifugal separation chamber 4, and the other end of the conveying pipe 5 is connected to the waste heat recovery tank 1. A heat exchange component is provided inside the waste heat recovery tank 1. An acceleration component for increasing the separation speed is provided inside the centrifugal separation chamber 4. A collection component for collecting the separated flue gas dust is provided at the bottom of the centrifugal separation chamber 4.

[0033] In this embodiment, the waste heat recovery tank 1 is a commonly used waste gas treatment tank on the market. The heat preservation chamber 2 is located on one side of the waste heat recovery tank 1. The air inlet pipe 3 is connected to the heat preservation chamber 2. The centrifugal separation chamber 4 is located in the middle of the heat preservation chamber 2. The conveying pipe 5 is connected to the centrifugal separation chamber 4. The air inlet pipe 3 is tangent to the inner wall of the centrifugal separation chamber 4. When the flue gas enters the centrifugal separation chamber 4 from the air inlet pipe 3, it will flow inside the centrifugal separation chamber 4, which can generate centrifugal force inside the centrifugal separation chamber 4, which can facilitate the separation of particulate matter in the flue gas. The other end of the conveying pipe 5 is connected to the waste heat recovery tank 1. The heat exchange component can recover the heat in the boiler exhaust gas after dust removal. The speed-increasing component can increase the air intake speed. The collection component can collect the particulate matter separated in the centrifugal separation chamber 4.

[0034] like Figures 1-4 As shown, in this embodiment, preferably, the speed-increasing component includes a rotating shaft 6, on which multiple blades 7 are provided. The rotating shaft 6 is rotatably connected to the inside of the insulation chamber 2. There are multiple blades 7, which are fixedly connected to the rotating shaft 6. Since the flue gas enters along the tangential direction of the inner wall of the centrifugal separation chamber 4, when the flue gas flows inside the centrifugal separation chamber 4, it will drive the rotating shaft 6 and the multiple blades 7 to rotate. During the rotation of the multiple blades 7, the flow of flue gas will be accelerated, and the air intake speed will be increased.

[0035] In this embodiment, preferably, the lower middle part of the centrifugal separation chamber 4 is provided with a plurality of spiral guide strips 8. There are multiple guide strips 8, which are arranged in a spiral on the inner wall of the centrifugal separation chamber 4, which can promote the formation of swirling flow of flue gas in the centrifugal separation chamber 4.

[0036] Example 2

[0037] like Figures 1-4As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the top end of the rotating shaft 6 extends into the inside of the conveying pipe 5, and a plurality of blades 9 are provided on the rotating shaft 6 and inside the conveying pipe 5.

[0038] In this embodiment, there are multiple blades 2 9, which are fixedly connected to the upper middle part of the rotating shaft 6. The multiple blades 2 9 are located inside the conveying pipe 5. When the flue gas flows in the conveying pipe 5, it will drive the rotating shaft 6 to rotate through the multiple blades 2 9, which can increase the intake speed of the flue gas.

[0039] Example 3

[0040] like Figures 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the collection component includes a collection chamber 10 installed at the bottom of the centrifugal separation chamber 4, the collection chamber 10 is bucket-shaped, the bottom of the collection chamber 10 is connected to a discharge pipe 11, and the bottom of the discharge pipe 11 is connected to a detachable collection box 12; the bottom of the rotating shaft 6 extends into the discharge pipe 11, and the rotating shaft 6 is provided with a clearing strip 13.

[0041] In this embodiment, the collection chamber 10 is located at the bottom of the centrifugal separation chamber 4, the discharge pipe 11 is located at the bottom of the collection chamber 10, the collection box 12 is connected to the bottom of the discharge pipe 11 by a thread, the unclogging strip 13 is fixed to the rotating shaft 6, and the guide strip 8 is located at the bottom of the centrifugal separation chamber 4. The dust particles separated by centrifugation fall into the collection chamber 10 and are discharged from the bottom of the bucket-shaped collection chamber 10 through the discharge pipe 11 into the collection box 12. When the dust in the collection box 12 is full, it can be removed for cleaning. The unclogging strip 13 is located at the bottom of the rotating shaft 6. There are multiple unclogging strips 13. The unclogging strips 13 are arranged in a spiral shape in the lower middle part of the rotating shaft 6. When the rotating shaft 6 rotates, the unclogging strips 13 will rotate with it, which can prevent dust from clogging in the discharge pipe 11.

[0042] Example 4

[0043] like Figures 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the heat exchange assembly includes an inlet pipe 14 and an outlet pipe 15 installed on the waste heat recovery tank 1, and a plurality of heat exchange pipes 16 are provided between the inlet pipe 14 and the outlet pipe 15, and the heat exchange pipes 16 are located inside the waste heat recovery tank 1.

[0044] In this embodiment, the inlet pipe 14 and the outlet pipe 15 are located outside the waste heat recovery tank 1. The heat exchange tube 16 can be a finned tube commonly used in the market. There are multiple heat exchange tubes 16. The inlet end of the heat exchange tube 16 is connected to the inlet pipe 14, and the outlet end of the heat exchange tube 16 is connected to the outlet pipe 15. It can absorb heat from the flue gas.

[0045] The working principle of this boiler waste heat recovery device will be explained in detail below.

[0046] like Figures 1-4 As shown, during use, flue gas is first introduced into the centrifugal separation chamber 4 through the inlet pipe 3. The flue gas flows along the side wall of the centrifugal separation chamber 4. Multiple guide strips 8 on the inner wall of the centrifugal separation chamber 4 promote the formation of eddies and swirls in the flue gas. During this process, solid impurities in the flue gas move on the inner wall of the centrifugal separation chamber 4 due to centrifugal force until they fall into the collection chamber 10 at the bottom. The separated flue gas enters the waste heat recovery tank 1 through the conveying pipe 5. When the flue gas flows inside the waste heat recovery tank 1, the water inlet pipe 14... The cold water inside will enter multiple heat exchange tubes 16. The heat in the flue gas will be absorbed by the cold water in the heat exchange tubes 16. The cold water after absorbing heat will be discharged from the outlet pipe 15. The cold water after absorbing heat can be recycled and reused. When the flue gas forms a vortex or eddy in the centrifugal separation chamber 4, the flue gas can drive the rotating shaft 6 to rotate through the blade 7. When the flue gas enters the inside of the conveying pipe 5, the flue gas will drive the rotating shaft 6 to rotate faster through multiple blades 9, which can increase the flue gas entry rate and promote the separation of particulate matter in the flue gas.

[0047] More specifically, the inside of the conveying pipe 5 is provided with a filter screen 17, which can filter the flue gas entering the conveying pipe 5 again.

[0048] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A boiler waste heat recovery device comprising a waste heat recovery tank (1) for exhaust gas waste heat recovery; characterized in that: The waste heat recovery tank (1) has an insulated chamber (2) on one side, an air inlet pipe (3) on the insulated chamber (2), a centrifugal separation chamber (4) inside the insulated chamber (2), the air inlet pipe (3) is arranged along the tangential direction of the inner wall of the centrifugal separation chamber (4), a conveying pipe (5) is connected to the centrifugal separation chamber (4), and the other end of the conveying pipe (5) is connected to the waste heat recovery tank (1). The waste heat recovery tank (1) is equipped with a heat exchange component inside, the centrifugal separation chamber (4) is equipped with a speed-increasing component for improving the separation speed, and the bottom of the centrifugal separation chamber (4) is equipped with a collection component for collecting the separated dust.

2. The boiler waste heat recovery device according to claim 1, characterized in that: The speed-increasing component includes a rotating shaft (6) on which multiple blades (7) are provided.

3. A boiler waste heat recovery device according to claim 2, characterized in that: The lower part of the centrifugal separation chamber (4) is provided with multiple spiral guide bars (8).

4. A boiler waste heat recovery device according to claim 3, characterized in that: The top end of the rotating shaft (6) extends into the inside of the conveying pipe (5), and multiple blades (9) are provided on the rotating shaft (6) and inside the conveying pipe (5).

5. A boiler waste heat recovery device according to claim 4, characterized in that: The collection assembly includes a collection chamber (10) installed at the bottom of the centrifugal separation chamber (4). The collection chamber (10) is bucket-shaped and a discharge pipe (11) is connected to the bottom of the collection chamber (10). A detachable collection box (12) is connected to the bottom of the discharge pipe (11).

6. A boiler waste heat recovery device according to claim 5, characterized in that: The bottom of the rotating shaft (6) extends into the discharge pipe (11), and the rotating shaft (6) is provided with a dredging strip (13).

7. A boiler waste heat recovery device according to claim 6, characterized in that: The heat exchange assembly includes an inlet pipe (14) and an outlet pipe (15) installed on the waste heat recovery tank (1). A plurality of heat exchange tubes (16) are provided between the inlet pipe (14) and the outlet pipe (15), and the heat exchange tubes (16) are located inside the waste heat recovery tank (1).

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