A sintering flue waste heat boiler

Abstract

The present invention relates to the field of heat exchange, and specifically to a sintering flue waste heat boiler, comprising a flue pipe body and a heat exchange device, the flue pipe body consisting of an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are coaxially connected with an intermediate connecting pipe, and the air inlet end of the air inlet pipe is also provided with a flange, and the air outlet end of the air outlet pipe is also provided with a fixing part, the heat exchange device comprises a water circulation pipe, a water suction mechanism and an air flow acceleration mechanism, the water suction mechanism and the water circulation pipe are interconnected, and a linkage mechanism is provided between the intermediate connecting pipe and the air outlet pipe, which can drive the water suction mechanism to work through the air flow acceleration mechanism. The present application completes the heat exchange between the flue gas and the condensed water by driving the water suction mechanism to work under the connection of the linkage mechanism through the air flow acceleration mechanism, reduces the cost, ensures that the flue gas discharge rate is proportional to the condensed water circulation rate, and avoids the situation where the heat exchange between the flue gas and the condensed water is insufficient.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange, in particular to a sintering flue waste heat boiler. Background Art

[0002] At present, in boiler combustion systems, flue gas waste heat recovery technology is the energy-saving technology with the most obvious energy-saving benefits and the fastest results. According to the requirements of national environmental protection policies, coal-fired boilers must be equipped with flue gas desulfurization systems. The flue gas desulfurization of large-scale thermal power plant units is mainly based on limestone-gypsum wet technology. However, the operating temperature of the limestone-gypsum wet desulfurization process is relatively low, which is far from the boiler's designed flue gas temperature. Usually, water spraying is required in the desulfurization system to cool the flue gas temperature. This not only loses the heat of the flue gas between the exhaust temperature and the desulfurization temperature, but also increases the water consumption of the power plant and the water vapor content in the net flue gas. The increase in flue gas emissions also affects the environmental protection status of the environment around the power plant. The flue gas heat at the boiler outlet is basically not recycled, and the pressure on operating energy consumption and environmental emissions is increased.

[0003] The currently disclosed Chinese patent CN201520576137.1 is a combined economizer flue gas waste heat recovery device and a flue gas waste heat recovery system, which includes: a shell, a flue gas channel is defined in the shell, and the flue gas channel has a flue gas inlet and a flue gas outlet; a cold fluid channel, a cold fluid flows in the cold fluid channel, and has a cold fluid inlet and a cold fluid outlet, and the flow direction of the cold fluid in the cold fluid channel is opposite to the flow direction of the flue gas in the flue gas channel; a heat exchange pipe group, the heat exchange pipe group is arranged through the shell to enable the cold fluid in the heat exchange pipe group to exchange heat with the flue gas in the flue gas channel, and the heat exchange pipe group includes a plurality of heat exchange pipes of different materials, and the plurality of heat exchange pipes are respectively connected to the cold fluid channel and arranged in sequence.

[0004] According to the above patent, the patent exchanges heat between cold fluid and flue gas through a heat exchange pipe group. However, during the heat exchange process, the flue gas flowing into the heat exchange pipe group cannot completely act on the heat exchange pipe group, and there will be residual heat that cannot be successfully exchanged. In addition, the patent has too many driving sources, which increases the cost. Therefore, there is a need for a device that can use the power of blowing in flue gas to exchange heat and ensure complete heat exchange. Summary of the Invention

[0005] Based on this, it is necessary to provide a sintering flue waste heat boiler to address the existing technical problems. This application uses an airflow acceleration mechanism to drive the water absorption mechanism under the connection of a linkage mechanism, thereby completing the heat exchange between the flue gas and the condensed water, reducing costs, and ensuring that the flue gas discharge rate is proportional to the condensed water circulation rate, thereby avoiding insufficient heat exchange between the flue gas and the condensed water.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0007] The present invention provides a sintering flue waste heat boiler, comprising a flue pipe body and a heat exchange device arranged inside the flue pipe body, the flue pipe body consists of an air inlet pipe and an air outlet pipe, an intermediate connecting pipe is coaxially connected between the air inlet pipe and the air outlet pipe, and the air inlet end of the air inlet pipe is also provided with a flange, and the air outlet end of the air outlet pipe is also provided with a fixing part, the heat exchange device comprises a water circulation pipe for circulating condensed water and a water absorption mechanism for absorbing condensed water and an air flow acceleration mechanism for accelerating the flow rate of hot air, the water circulation pipe is arranged in the air outlet pipe, the water absorption mechanism is arranged on the outer wall of the intermediate connecting pipe and the water absorption mechanism and the water circulation pipe are connected to each other, the air flow acceleration mechanism is arranged inside the intermediate connecting pipe, and a linkage mechanism is also provided between the intermediate connecting pipe and the air outlet pipe, which can drive the water absorption mechanism to work through the air flow acceleration mechanism.

[0008] Preferably, a water outlet is provided on the pipe wall of the air outlet pipe at a position close to the middle connecting pipe, and a water inlet is provided on the pipe wall of the air outlet pipe at a position away from the middle connecting pipe. One end of the water circulation pipe is fixed at the water outlet of the air outlet pipe, and the other end of the water circulation pipe is fixed at the water inlet of the air outlet pipe in a spiral form along the inner wall of the air outlet pipe. The water circulation pipe and the air outlet pipe are coaxially arranged, and the end of the water circulation pipe connected to the water outlet is also connected to a water suction pipe outwardly, and the end of the water circulation pipe connected to the water inlet is also connected to a water inlet pipe outwardly.

[0009] Preferably, the water suction mechanism includes an impeller and a shell, the shell is fixedly arranged on the outer wall of the middle connecting pipe, and the shell has a circular cavity inside. The impeller is coaxially and rotatably arranged in the circular cavity of the shell through a gear shaft. A water suction port for connection of the water suction pipe is provided on the side of the shell facing the water suction pipe, and a drain outlet is also provided in the lower half of the side wall of the shell, and a drain pipe is also connected to the drain outlet.

[0010] Preferably, the airflow acceleration mechanism includes a large rotary blade fan, which is coaxially arranged inside the intermediate connecting pipe. Both ends of the intermediate connecting pipe are coaxially and fixedly provided with a ring-shaped ventilation shaft frame. Each ventilation shaft frame is provided with a first bearing at the axial center position. The outer ring of each first bearing is fixed on the corresponding ventilation shaft frame. A first shaft rod is also connected between the two first bearings, and the two ends of the first shaft rod are respectively fixed on the inner ring of the corresponding first bearing. The large rotary blade fan is coaxially and fixedly sleeved on the first shaft rod.

[0011] Preferably, the linkage mechanism includes a driving member and a driven member, the driving member is arranged on the first shaft, the driven member is arranged on the gear shaft, and the driving member and the driven member are connected to each other.

[0012] Preferably, the active component is a ring gear, which is fixedly mounted on a rotating frame. The rotating frame is coaxially mounted on the first shaft and the rotating frame and the first shaft are fixedly connected by a pin. A second bearing is coaxially provided on one end of the intermediate connecting pipe facing the air outlet pipe and the other end of the air outlet pipe facing the intermediate connecting pipe. The outer ring of each second bearing is respectively fixed on the intermediate connecting pipe and the air outlet pipe, and the rotating frame is also fixed on the inner rings of the two second bearings.

[0013] Preferably, the driven member is a driven gear, which is coaxially and fixedly sleeved on the gear shaft. The gear shaft is rotatably arranged on a fixed frame fixed to the outer wall of the intermediate connecting pipe, and the driven gear and the ring gear are also meshed with each other.

[0014] Preferably, it also includes a hot air circulation pipe coaxially arranged inside the outlet pipe, a plurality of air holes are opened on the pipe wall of the hot air circulation pipe, the diameter of the hot air circulation pipe is smaller than the diameter of the outlet pipe, a gap for hot air circulation is left between the hot air circulation pipe and the outlet pipe, and a drainage hopper is also provided at one end of the hot air circulation pipe facing the middle connecting pipe, and the diameter of the large mouth end of the drainage hopper is equal to the diameter of the outlet pipe.

[0015] Preferably, a first conical drainage pipe with two ends passing through is coaxially provided at one end of the hot air circulation pipe away from the drainage bucket, the conical surface of the first conical drainage pipe faces the axis of the air outlet of the air outlet pipe, and a ring-shaped ventilation support frame for supporting the first conical drainage pipe is also provided at the air outlet of the air outlet pipe. The inner wall of the hot air circulation pipe is also provided with a plurality of second conical drainage pipes with two ends passing through at equal intervals along its axial direction, and the conical surface of each second conical drainage pipe faces the drainage bucket.

[0016] Preferably, it also includes an external rotating mechanism arranged at one end of the hot air circulation pipe provided with the first conical drainage pipe and located inside the hot air circulation pipe, the external rotating mechanism includes a small rotary blade fan, and the hot air circulation pipe is provided with a ventilation end plate coaxially and fixedly installed at one end of the first conical drainage pipe, a third bearing is provided at the axis of the ventilation end plate, and the small rotary blade fan is also rotatably arranged on the third bearing through a second shaft.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This application uses an airflow acceleration mechanism to drive the water absorption mechanism under the connection of a linkage mechanism, thereby achieving both an increase in the flue gas circulation rate and the absorption of condensed water in the water circulation pipe, completing the heat exchange between the flue gas and the condensed water, reducing costs, and ensuring that the flue gas discharge rate is proportional to the condensed water circulation rate, thereby avoiding insufficient heat exchange between the flue gas and the condensed water.

[0019] 2. This application achieves full contact between the flue gas and the water flow pipe by installing the water flow pipe in a spiral form inside the exhaust pipe, ensuring that the heat in the flue gas can be better transferred to the condensed water.

[0020] 3. This application realizes the self-priming and discharge of condensed water by generating centrifugal force through the rotation of the impeller, and also controls the flow rate of condensed water by connecting the airflow acceleration mechanism and the impeller through a linkage mechanism, thereby achieving the gain of the condensed water flow rate without the need for a water pump.

[0021] 4. This application achieves an increase in the smoke circulation rate and improves the efficiency of smoke exhaust through the provision of a large rotary blade fan.

[0022] 5. This application realizes the rotation of the impeller through the cooperation between the active part and the driven part, thereby realizing the absorption of condensed water.

[0023] 6. This application realizes the dispersion of flue gas toward the water flow pipe through the arrangement of several second conical drainage pipes and the orientation of the conical surface of the second conical drainage pipe, ensures complete contact between the flue gas and the water flow pipe, and improves the heat exchange effect between hot air and condensed water.

[0024] 7. This application achieves the effect of draining the flue gas in the hot air circulation pipe outward by setting a small rotary blade fan, ensuring that the flue gas can exchange heat with the condensed water, thereby improving the comprehensiveness of the flue gas heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of this application;

[0026] Figure 2 is the main view of this application;

[0027] Figure 3 It is a right view of this application;

[0028] Figure 4 yes Figure 3 A cross-sectional view of the local three-dimensional structure at AA;

[0029] Figure 5 is a top view of the present application;

[0030] Figure 6 yes Figure 5 Cross-sectional view at BB;

[0031] Figure 7 yes Figure 6 An enlarged schematic diagram of point C;

[0032] Figure 8 yes Figure 6 An enlarged schematic diagram of point D;

[0033] Figure 9 yes Figure 6 An enlarged schematic diagram of point E;

[0034] Figure 10 yes Figure 5 FF cross-sectional view;

[0035] Figure 11 It is a schematic diagram of the three-dimensional structure decomposition of the present application;

[0036] Figure 12 It is a schematic diagram of the three-dimensional structure of the heat exchange device;

[0037] Figure 13 yes Figure 12 main view.

[0038] The numbers in the figure are:

[0039] 1- Flue pipe body; 1a- Inlet pipe; 1a1- Flange; 1b- Outlet pipe; 1b1- Fixing parts;

[0040] 2-heat exchange device; 2a-water flow pipe; 2a1-water suction pipe; 2a2-water inlet pipe; 2b-water suction mechanism; 2b1-impeller; 2b2-housing; 2b3-gear shaft; 2b4-drain pipe; 2c-airflow acceleration mechanism; 2c1-large rotary blade fan; 2c2-first shaft; 2d-linkage mechanism; 2d1-ring gear; 2d2-rotating frame; 2d3-pin; 2d4-second bearing; 2d5-driven gear; 2d6-fixed frame;

[0041] 3-intermediate connecting pipe; 3a-ventilation shaft bracket; 3a1-first bearing;

[0042] 4-hot air flow pipe; 4a-air hole; 4b-drainage bucket; 4c-first conical drainage pipe; 4d-ventilation support frame; 4e-second conical drainage pipe;

[0043] 5-outward rotation mechanism; 5a-small rotary blade fan; 5a1-second shaft; 5b-ventilation end plate; 5c-third bearing. DETAILED DESCRIPTION

[0044] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1-13 As shown, this application provides:

[0046] A sintering flue waste heat boiler comprises a flue pipe body 1 and a heat exchange device 2 arranged inside the flue pipe body 1, the flue pipe body 1 consists of an air inlet pipe 1a and an air outlet pipe 1b, an intermediate connecting pipe 3 is coaxially connected between the air inlet pipe 1a and the air outlet pipe 1b, and the air inlet end of the air inlet pipe 1a is also provided with a flange 1a1, and the air outlet end of the air outlet pipe 1b is also provided with a fixing part 1b1, the heat exchange device 2 comprises a water circulation pipe 2a for circulating condensed water and a water suction mechanism 2b for absorbing condensed water and an air flow acceleration mechanism 2c for accelerating the flow rate of hot gas, the water circulation pipe 2a is arranged in the air outlet pipe 1b, the water suction mechanism 2b is arranged on the outer wall of the intermediate connecting pipe 3 and the water suction mechanism 2b and the water circulation pipe 2a are connected to each other, the air flow acceleration mechanism 2c is arranged inside the intermediate connecting pipe 3, and a linkage mechanism 2d is also provided between the intermediate connecting pipe 3 and the air outlet pipe 1b, which can drive the water suction mechanism 2b to work through the air flow acceleration mechanism 2c.

[0047] Based on the above embodiments, the technical problem that the present application aims to solve is how the flue gas is heat exchanged by the heat exchange device 2. To this end, the present application connects the air inlet pipe 1a with the equipment for circulating the flue gas through the flange 1a1, and the air outlet pipe 1b is fixed by the fixing part 1b1. Then, the flue gas is introduced into the air inlet pipe 1a. As the flue gas is blown in, the air flow acceleration mechanism 2c is triggered by the flow of the flue gas. After the flue gas passes through the air flow acceleration mechanism 2c, the speed is increased. Under the drive of the air flow acceleration mechanism 2c, the linkage mechanism 2d is also triggered. However, the linkage mechanism 2d connects the air flow acceleration mechanism 2c and the water absorption mechanism 2b. Therefore, the water absorption mechanism 2b absorbs the cold water in the water circulation pipe 2a under the drive of the linkage mechanism 2d. Condensed water flows along the axis of the outlet pipe 1b through the water flow pipe 2a. When the flue gas enters the outlet pipe 1b, due to the contact between the flue gas and the pipe wall of the water flow pipe 2a, the heat on the flue gas is transferred to the condensed water, and the condensed water is then turned into hot water. As the water absorption mechanism 2b absorbs the condensed water, the hot water is eventually sucked out of the water flow pipe 2a. After the heat in the hot water is utilized, the hot water turns back into the state of condensed water. The condensed water is then sucked into the water flow pipe 2a, completing the heat exchange cycle. After the hot air absorbs the heat, it is eventually turned into cold air and blown out through the outlet pipe 1b.

[0048] Further, such as Figure 6 and Figure 13 As shown:

[0049] A water outlet is provided on the wall of the air outlet pipe 1b at a position close to the intermediate connecting pipe 3, and a water inlet is provided on the wall of the air outlet pipe 1b at a position away from the intermediate connecting pipe 3. One end of the water circulation pipe 2a is fixed at the water outlet of the air outlet pipe 1b, and the other end of the water circulation pipe 2a is fixed at the water inlet of the air outlet pipe 1b in a spiral form along the inner wall of the air outlet pipe 1b. The water circulation pipe 2a and the air outlet pipe 1b are coaxially arranged, and the end of the water circulation pipe 2a connected to the water outlet is also connected to a water suction pipe 2a1 outwardly, and the end of the water circulation pipe 2a connected to the water inlet is also connected to a water inlet pipe 2a2 outwardly.

[0050] Based on the above embodiment, the technical problem that this application aims to solve is how to ensure sufficient heat exchange between condensed water and flue gas when it flows in the water circulation pipe 2a. To this end, this application absorbs the condensed water in the water circulation pipe 2a from the water suction pipe 2a1 through the water suction mechanism 2b. Before the water suction mechanism 2b works, the water inlet pipe 2a2 will be connected to the equipment with condensed water. With the suction force of the water suction pipe 2a1, the condensed water will flow into the water circulation pipe 2a. Since the water circulation pipe 2a is arranged in a spiral form in the exhaust pipe 1b, the flue gas can better contact with the water circulation pipe 2a when it is discharged into the exhaust pipe 1b, so that the condensed water absorbs the heat in the flue gas.

[0051] Further, such as Figure 10 As shown:

[0052] The water suction mechanism 2b includes an impeller 2b1 and a shell 2b2. The shell 2b2 is fixedly arranged on the outer wall of the intermediate connecting pipe 3. The shell 2b2 has a circular cavity inside. The impeller 2b1 is coaxially and rotatably arranged in the circular cavity of the shell 2b2 through a gear shaft 2b3. The shell 2b2 is provided with a water suction port for connection to the water suction pipe 2a1 on the side facing the water suction pipe 2a1. The lower half of the side wall of the shell 2b2 is also provided with a drain outlet, and a drain pipe 2b4 is also connected to the drain outlet.

[0053] Based on the above embodiment, the technical problem that this application aims to solve is how the water absorption mechanism 2b absorbs the condensed water in the water flow pipe 2a. To this end, this application drives the impeller 2b1 to rotate through the linkage mechanism 2d. When the impeller 2b1 rotates, the condensed water in the water flow pipe 2a is sucked into the housing 2b2 under the action of atmospheric pressure. As the impeller 2b1 rotates, centrifugal force is generated. The rotating impeller 2b1 throws the condensed water outward. The condensed water on the outside rotates along with the impeller 2b1, and the housing 2b2 guides the condensed water to be discharged from the drain pipe 2b4.

[0054] Further, such as Figure 3 、 Figure 7 、 Figure 12 and Figure 13 As shown:

[0055] The airflow acceleration mechanism 2c includes a large rotary blade fan 2c1, which is coaxially arranged inside the intermediate connecting pipe 3. Both ends of the intermediate connecting pipe 3 are coaxially and fixedly provided with a ring-shaped ventilation shaft frame 3a. Each ventilation shaft frame 3a is provided with a first bearing 3a1 at the axial center position. The outer ring of each first bearing 3a1 is fixed on the corresponding ventilation shaft frame 3a. A first shaft rod 2c2 is also connected between the two first bearings 3a1, and the two ends of the first shaft rod 2c2 are also respectively fixed on the inner ring of the corresponding first bearing 3a1. The large rotary blade fan 2c1 is coaxially and fixedly sleeved on the first shaft rod 2c2.

[0056] Based on the above embodiments, the technical problem to be solved by this application is how the airflow acceleration mechanism 2c can achieve an increase in the smoke flow rate. To this end, this application blows smoke into the air inlet duct 1a, whereupon the smoke passes through the large rotary blade fan 2c1. As it passes through the large rotary blade fan 2c1, it rotates under the impetus of the smoke, and the rotating large rotary blade fan 2c1 accelerates the rate at which the smoke is discharged into the air outlet duct 1b.

[0057] Further, such as Figure 8 、 Figure 12 and Figure 13 As shown:

[0058] The linkage mechanism 2d includes a driving member and a driven member. The driving member is arranged on the first shaft 2c2, and the driven member is arranged on the gear shaft 2b3. The driving member and the driven member are also connected to each other.

[0059] Based on the above embodiment, the technical problem to be solved by this application is how the linkage mechanism 2d drives the water suction mechanism 2b through the airflow acceleration mechanism 2c. To this end, this application utilizes a large rotary fan 2c1 that rotates with the blowing of smoke, and the first shaft 2c2 then drives the active member. Since the active member and the driven member are interconnected, the driven member is driven, and the gear shaft 2b3 also rotates accordingly. The impeller 2b1 also rotates synchronously with the rotation of the gear shaft 2b3, thereby completing the water suction operation.

[0060] Further, such as Figure 7 、 Figure 12 and Figure 13 As shown:

[0061] The active component is specifically a ring gear 2d1, which is fixedly mounted on a rotating frame 2d2. The rotating frame 2d2 is coaxially mounted on the first shaft 2c2, and the rotating frame 2d2 and the first shaft 2c2 are fixedly connected by a pin 2d3. A second bearing 2d4 is coaxially provided on one end of the intermediate connecting pipe 3 facing the air outlet pipe 1b and the other end of the air outlet pipe 1b facing the intermediate connecting pipe 3. The outer ring of each second bearing 2d4 is respectively fixed on the intermediate connecting pipe 3 and the air outlet pipe 1b, and the rotating frame 2d2 is also fixed on the inner rings of the two second bearings 2d4.

[0062] Based on the above embodiment, when the large rotary blade fan 2c1 rotates, the first shaft 2c2 drives the rotating frame 2d2 to rotate. As the rotating frame 2d2 rotates, the ring gear 2d1 fixedly mounted thereon also rotates. When the rotating frame 2d2 rotates, since the rotating frame 2d2 is connected to the intermediate connecting pipe 3 and the outlet pipe 1b through the second bearing 2d4, and the ring gear 2d1 is located between the two second bearings 2d4, the smoke will not flow out from the connection between the intermediate connecting pipe 3 and the outlet pipe 1b.

[0063] Further, such as Figure 8 、 Figure 12 and Figure 13 As shown:

[0064] The driven member is specifically a driven gear 2d5, which is coaxially and fixedly mounted on the gear shaft 2b3. The gear shaft 2b3 is rotatably mounted on a fixed frame 2d6 fixed to the outer wall of the intermediate connecting pipe 3, and the driven gear 2d5 and the ring gear 2d1 are also meshed with each other.

[0065] Based on the above embodiment, when the ring gear 2d1 rotates, since the ring gear 2d1 and the driven gear 2d5 are engaged with each other, the driven gear 2d5 drives the gear shaft 2b3 to rotate, and the gear shaft 2b3 simultaneously drives the impeller 2b1 to rotate. As the impeller 2b1 rotates, the condensed water in the water circulation pipe 2a is sucked into the shell 2b2, and as the rotation speed of the large rotary blade fan 2c1 accelerates or increases, the rotation speed of the impeller 2b1 also changes, thereby controlling the absorption rate of the condensed water and being able to better exchange heat with the flue gas as it circulates.

[0066] Further, such as Figure 4 、 Figure 6 and Figure 9 As shown:

[0067] It also includes a hot air circulation pipe 4 coaxially arranged inside the outlet pipe 1b, and a plurality of air holes 4a are opened on the pipe wall of the hot air circulation pipe 4. The diameter of the hot air circulation pipe 4 is smaller than the diameter of the outlet pipe 1b. A gap for hot air circulation is left between the hot air circulation pipe 4 and the outlet pipe 1b, and a drainage hopper 4b is provided at one end of the hot air circulation pipe 4 facing the middle connecting pipe 3. The diameter of the large mouth end of the drainage hopper 4b is equal to the diameter of the outlet pipe 1b.

[0068] Based on the above embodiment, after the flue gas enters the hot air circulation pipe 4 along the diversion bucket 4b, the flue gas continues to flow along the hot air circulation pipe 4. When the flue gas enters the hot air circulation pipe 4, since a number of air holes 4a are opened on the hot air circulation pipe 4, the flue gas will flow through the air holes 4a to the pipe wall of the water circulation pipe 2a. The flue gas contacts the pipe wall, thereby performing heat exchange with the condensed water in the water circulation pipe 2a.

[0069] Further, such as Figure 6 、 Figure 9 and Figure 13 As shown:

[0070] A first conical drainage pipe 4c with both ends passing through is coaxially provided at one end of the hot air circulation pipe 4 away from the drainage bucket 4b, and the conical surface of the first conical drainage pipe 4c faces the axis of the outlet of the outlet pipe 1b. A ring-shaped ventilation support frame 4d is also provided at the outlet of the outlet pipe 1b to support the first conical drainage pipe 4c. The inner wall of the hot air circulation pipe 4 is also provided with a number of second conical drainage pipes 4e with both ends passing through at equal intervals along its axial direction, and the conical surface of each second conical drainage pipe 4e faces the drainage bucket 4b.

[0071] Based on the above embodiments, the technical problem that the present application aims to solve is how the smoke can be dispersed toward the water flow pipe 2a when flowing in the hot gas flow pipe 4. To this end, the present application sets a number of second conical drainage pipes 4e in the hot air circulation pipe 4. When the flue gas enters the hot air circulation pipe 4, the flue gas is dispersed toward the first conical drainage pipe 4c under the action of the large rotary blade fan 2c1. During the smoke dispersion process, since the conical surface of the second conical drainage pipe 4e is facing the large rotary blade fan 2c1, the flue gas will be discharged from the air hole 4a along the conical surface of the second conical drainage pipe 4e and contact the pipe wall of the water circulation pipe 2a. Through the setting of the number of second conical drainage pipes 4e, the flue gas is finally completely drained toward the water circulation pipe 2a, and the heat in the flue gas is also completely exchanged into the condensed water in the water circulation pipe 2a. When the flue gas is discharged, the flue gas in the hot air circulation pipe 4 is discharged from the first conical drainage pipe 4c, and the flue gas between the hot air circulation pipe 4 and the outlet pipe 1b is discharged outward along the conical surface of the first conical drainage pipe 4c.

[0072] Further, such as Figure 9 As shown:

[0073] It also includes an external rotating mechanism 5 arranged at one end of the hot air circulation pipe 4 provided with a first conical drainage pipe 4c and located inside the hot air circulation pipe 4, the external rotating mechanism 5 includes a small rotary blade fan 5a, and a ventilation end plate 5b is coaxially and fixedly installed at one end of the hot air circulation pipe 4 provided with the first conical drainage pipe 4c, a third bearing 5c is provided at the axis center of the ventilation end plate 5b, and the small rotary blade fan 5a is also rotatably arranged on the third bearing 5c through a second shaft 5a1.

[0074] Based on the above embodiment, the technical problem that the present application aims to solve is how to make the smoke contact the water flow pipe 2a again when the smoke is discharged from the first conical drainage pipe 4c. To this end, the present application sets a small rotary blade fan 5a. When the smoke drifts along the hot air flow pipe 4 toward the first conical drainage pipe 4c, the smoke contacts the small rotary blade fan 5a, thereby driving the rotation of the small rotary blade fan 5a. The small rotary blade fan 5a then carries the smoke outward, and the smoke is blown out through the air holes 4a. The smoke passing through the air holes 4a contacts the water flow pipe 2a, so that some smoke that has not contacted the water flow pipe 2a can also be heat exchanged.

[0075] In this application, the airflow acceleration mechanism 2c drives the water absorption mechanism 2b to work under the connection of the linkage mechanism 2d, thereby achieving both an increase in the flue gas circulation rate and the absorption of condensed water in the water flow pipe 2a, thereby completing the heat exchange between the flue gas and the condensed water.

[0076] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A sintering flue waste heat boiler, comprising a flue pipe body (1) and a heat exchange device (2) arranged inside the flue pipe body (1), wherein the flue pipe body (1) is composed of an air inlet pipe (1a) and an air outlet pipe (1b), an intermediate connecting pipe (3) is coaxially connected between the air inlet pipe (1a) and the air outlet pipe (1b), and the air inlet end of the air inlet pipe (1a) is further provided with a flange (1a1), and the air outlet end of the air outlet pipe (1b) is further provided with a fixing member (1b1), characterized in that: The heat exchange device (2) comprises a water flow pipe (2a) for circulating condensed water, a water absorption mechanism (2b) for absorbing condensed water, and an airflow acceleration mechanism (2c) for accelerating the flow rate of hot air, wherein the water flow pipe (2a) is arranged in the outlet pipe (1b), the water absorption mechanism (2b) is arranged on the outer wall of the intermediate connecting pipe (3), and the water absorption mechanism (2b) and the water flow pipe (2a) are connected to each other, the airflow acceleration mechanism (2c) is arranged in the interior of the intermediate connecting pipe (3), and a linkage mechanism (2d) is further provided between the intermediate connecting pipe (3) and the outlet pipe (1b), which can drive the water absorption mechanism (2b) to work through the airflow acceleration mechanism (2c); The water suction mechanism (2b) comprises an impeller (2b1) and a housing (2b2), the housing (2b2) being fixedly arranged on the outer wall of the intermediate connecting pipe (3), the housing (2b2) having a circular cavity therein, the impeller (2b1) being coaxially and rotatably arranged in the circular cavity of the housing (2b2) via a gear shaft (2b3), a water suction port for connection to the water suction pipe (2a1) being provided on a side of the housing (2b2) facing the water suction pipe (2a1), a drainage port being provided on the lower half of the side wall of the housing (2b2), and a drainage pipe (2b4) being connected to the drainage port; The airflow acceleration mechanism (2c) includes a large rotary blade fan (2c1), which is coaxially arranged inside the intermediate connecting pipe (3). Both ends of the intermediate connecting pipe (3) are coaxially and fixedly provided with an annular ventilation shaft frame (3a). A first bearing (3a1) is provided at the axis center position of each ventilation shaft frame (3a). The outer ring of each first bearing (3a1) is fixed on the corresponding ventilation shaft frame (3a). A first shaft rod (2c2) is also connected between the two first bearings (3a1), and the two ends of the first shaft rod (2c2) are also fixed on the inner ring of the corresponding first bearing (3a1). The large rotary blade fan (2c1) is coaxially and fixedly sleeved on the first shaft rod (2c2). The linkage mechanism (2d) includes a driving member and a driven member, wherein the driving member is arranged on the first shaft (2c2), and the driven member is arranged on the gear shaft (2b3), and the driving member and the driven member are connected to each other; The active component is specifically a ring gear (2d1), the ring gear (2d1) is fixedly sleeved on a rotating frame (2d2), the rotating frame (2d2) is coaxially sleeved on the first shaft (2c2), and the rotating frame (2d2) and the first shaft (2c2) are also fixedly connected via a pin (2d3), one end of the intermediate connecting pipe (3) facing the air outlet pipe (1b) and one end of the air outlet pipe (1b) facing the intermediate connecting pipe (3) are both coaxially provided with a second bearing (2d4), the outer ring of each second bearing (2d4) is respectively fixed on the intermediate connecting pipe (3) and the air outlet pipe (1b), and the rotating frame (2d2) is also fixed on the inner rings of the two second bearings (2d4); The driven member is specifically a driven gear (2d5), which is coaxially and fixedly sleeved on the gear shaft (2b3), and the gear shaft (2b3) is rotatably arranged on a fixed frame (2d6) fixed on the outer wall of the intermediate connecting pipe (3), and the driven gear (2d5) and the ring gear (2d1) are also meshed with each other.

2. The sintering flue waste heat boiler according to claim 1, characterized in that: A water outlet is provided on the wall of the air outlet pipe (1b) at a position close to the intermediate connecting pipe (3), and a water inlet is provided on the wall of the air outlet pipe (1b) at a position away from the intermediate connecting pipe (3). One end of the water circulation pipe (2a) is fixed at the water outlet of the air outlet pipe (1b), and the other end of the water circulation pipe (2a) is fixed at the water inlet of the air outlet pipe (1b) in a spiral along the inner wall of the air outlet pipe (1b). The water circulation pipe (2a) and the air outlet pipe (1b) are coaxially arranged, and the end of the water circulation pipe (2a) connected to the water outlet is further connected to a water suction pipe (2a1), and the end of the water circulation pipe (2a) connected to the water inlet is further connected to a water inlet pipe (2a2).

3. The sintering flue waste heat boiler according to claim 1, characterized in that: The invention also includes a hot air circulation pipe (4) coaxially arranged inside the outlet pipe (1b), a plurality of air holes (4a) are provided on the pipe wall of the hot air circulation pipe (4), the diameter of the hot air circulation pipe (4) is smaller than the diameter of the outlet pipe (1b), a gap for hot air circulation is left between the hot air circulation pipe (4) and the outlet pipe (1b), and a drainage hopper (4b) is provided at one end of the hot air circulation pipe (4) facing the intermediate connecting pipe (3), and the diameter of the large end of the drainage hopper (4b) is equal to the diameter of the outlet pipe (1b).

4. The sintering flue waste heat boiler according to claim 3, characterized in that: A first conical drainage pipe (4c) with two ends extending therethrough is coaxially provided at one end of the hot air circulation pipe (4) away from the drainage hopper (4b), the conical surface of the first conical drainage pipe (4c) faces the axis of the outlet of the outlet pipe (1b), and a ring-shaped ventilation support frame (4d) for supporting the first conical drainage pipe (4c) is also provided at the outlet of the outlet pipe (1b). A plurality of second conical drainage pipes (4e) with two ends extending therethrough are also provided on the inner wall of the hot air circulation pipe (4) at equal intervals along its axial direction, and the conical surface of each second conical drainage pipe (4e) faces the drainage hopper (4b).

5. The sintering flue waste heat boiler according to claim 3, characterized in that: The invention also includes an external rotating mechanism (5) arranged at one end of the hot air circulation pipe (4) provided with the first conical drainage pipe (4c) and located inside the hot air circulation pipe (4), the external rotating mechanism (5) including a small rotary blade fan (5a), a ventilation end plate (5b) coaxially and fixedly mounted on one end of the hot air circulation pipe (4) provided with the first conical drainage pipe (4c), a third bearing (5c) being provided at the axis of the ventilation end plate (5b), and the small rotary blade fan (5a) being rotatably arranged on the third bearing (5c) via a second shaft (5a1).

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