Carbon black thermoelectric flue gas waste heat utilization device

Abstract

The utility model discloses a carbon black thermoelectric flue gas waste heat utilization device, which relates to the technical field of carbon black production preheating recovery, and comprises a heat exchange outer pipe, a support assembly is arranged in the heat exchange outer pipe, and an inner heat exchanger for waste heat recovery is arranged on the support assembly. The water inlet end and the water outlet end of the inner heat exchanger penetrate through and extend out of the heat exchange outer pipe, and hot air adjusting pieces are installed on an air inlet and an air outlet of the heat exchange outer pipe. By optimizing the heat exchange structure, the double functions of high-efficiency heat energy recovery and flue gas cooling are realized. Specifically, the device adopts the combined design of the heat exchange outer pipe and the inner heat exchanger, so that the high-temperature flue gas and the deoxygenated water for the boiler are subjected to sufficient heat exchange, the heating efficiency of the deoxygenated water for the boiler is improved, the exhaust temperature of the flue gas of the desulfurizing tower is reduced, and the load of subsequent tail gas treatment equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production preheating and recovery technology, and in particular to a device for utilizing waste heat from carbon black thermal power flue gas. Background Technology

[0002] In the production process of carbon black by oil furnace, a large amount of high-calorific-value carbon black tail gas is produced. This carbon black tail gas is usually sent to the boiler for combustion to generate steam for power generation. However, there is heat loss and waste in this process. For example, the boiler water needs to be heated to 95°C before it can be sent to the boiler. The deoxygenated water is usually heated by low-pressure steam, which consumes a lot of heat energy.

[0003] In addition, the flue gas temperature entering the desulfurization tower is as high as 185°C, and cooling water needs to be sprayed in to cool it down to below 150°C before the next step of desulfurization can be carried out. This cooling process leads to a waste of a lot of water resources and also results in the loss of heat energy of the desulfurization flue gas. Therefore, a carbon black thermal power flue gas waste heat utilization device is provided to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem of thermal energy waste in the existing technology by proposing a waste heat utilization device for carbon black thermal power flue gas.

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

[0006] A waste heat recovery device for carbon black thermal power flue gas includes a heat exchange outer tube, a support assembly is installed inside the heat exchange outer tube, an inner heat exchanger for waste heat recovery is installed on the support assembly, the water inlet and outlet of the inner heat exchanger both penetrate and extend out of the heat exchange outer tube, and hot air regulating components are installed on the air inlet and air outlet of the heat exchange outer tube.

[0007] Preferably, a connecting pipe is installed on both the air inlet and the outlet of the heat exchanger outer tube.

[0008] Preferably, the internal heat exchanger includes a connector and an internal heat exchange tube. There are two connectors, which are respectively installed at the top and bottom of the external heat exchange tube. Both connectors are connected to the internal heat exchange tube by a high-temperature resistant rubber hose.

[0009] Preferably, the support assembly includes a support frame, a spacing adjustment rotating rod rotatably connected to the support frame, a drive gear mounted on the spacing adjustment rotating rod, and two racks slidably connected to the support frame. Both racks mesh with the drive gear, and a support block is mounted on one of the opposite ends of the two racks. Both support blocks are in contact with the inner heat exchange tube.

[0010] One end of the spacing adjustment rotating rod.

[0011] Preferably, a positioning steel wire is installed on the support block, and the support block is clamped to the inner heat exchange tube by the positioning steel wire.

[0012] Preferably, the hot air regulating component includes a threaded rotating rod and a pushing rod. One end of the threaded rotating rod is rotatably connected to the inner wall of the heat exchange outer tube, and the other end of the threaded rotating rod passes through and is rotatably connected to the heat exchange outer tube. Two positioning blocks are installed on the pushing rod, and two hot air flow regulating plates are rotatably connected to each positioning block. Four threaded rotating rings are threadedly connected to the threaded rotating rod, and the thread directions of two adjacent threaded rotating rings are opposite. The multiple hot air flow regulating plates are all hinged to adjacent threaded rotating rings.

[0013] Preferably, both ends of the push rod are equipped with sliders, and the inner wall of the heat exchange outer tube is provided with a limiting groove, and the slider is slidably connected to the adjacent limiting groove.

[0014] Preferably, the cross-section of two adjacent hot airflow regulating plates when viewed from above is V-shaped.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. This device achieves both efficient heat recovery and flue gas cooling through optimized heat exchange structure. Specifically, the device employs a combined design of outer heat exchange tubes and an inner heat exchanger, enabling thorough heat exchange between the high-temperature flue gas and the boiler deoxygenated water. This improves the heating efficiency of the boiler deoxygenated water and reduces the emission temperature of the flue gas from the desulfurization tower, thereby reducing the load on subsequent tail gas treatment equipment. The inner heat exchanger uses a double inner heat exchange tube structure, and the spacing is adjustable through a support assembly. Users only need to rotate the spacing adjustment lever to adjust the heat exchange tube spacing via a gear and rack mechanism to adapt to different operating conditions and improve heat exchange flexibility. Furthermore, the cooperation between the positioning steel wire and the support block ensures the stability of the heat exchange tubes during the adjustment process, avoiding displacement caused by vibration or airflow impact, thereby maintaining stable heat exchange efficiency. In addition, the adjustment of the support components increases the velocity of the fluid flowing through the tube bundle and enhances the turbulence when the spacing between the heat exchange tubes is small. This helps to enhance the heat exchange between the fluid and the tube wall, thereby improving the heat transfer coefficient and heat exchange efficiency. On the other hand, a larger tube spacing can reduce the resistance of fluid flow and reduce energy consumption. By reasonably designing the tube spacing of the heat exchanger, the overall area and volume of the equipment can be reduced.

[0017] 2. This device further optimizes airflow control, achieving dynamic adjustment of flue gas velocity and heat exchange efficiency through a hot air regulating component. A threaded rotating rod drives a reverse-threaded rotating ring, allowing the hot airflow regulating plate to retract or expand, precisely controlling the coverage area and velocity of the hot airflow, thereby optimizing the heat exchange process. Simultaneously, the push rod and slider slide within a limiting groove, ensuring smooth movement of the regulating plate and preventing airflow turbulence from affecting heat exchange. Furthermore, the hot airflow regulating plate at the outlet end can be replaced with a filter screen to pre-filter the exhaust gas after heat exchange, reducing particulate emissions and lowering the pollution risk to subsequent processing equipment. The hot airflow regulating plate also optimizes fluid distribution within the pipe spacing, further improving heat transfer efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional cross-sectional view of the present invention;

[0020] Figure 3 This is a three-dimensional exploded view of the support component in this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram of the hot air regulating component in this utility model from a first-view perspective;

[0022] Figure 5 This is a two-dimensional schematic diagram of the hot air regulating component in this utility model from a second perspective.

[0023] Legend: 1. Heat exchanger outer tube; 11. Connecting pipe; 12. Limiting groove; 2. Internal heat exchanger; 21. Connector; 22. Internal heat exchanger tube; 23. High-temperature resistant rubber hose; 3. Support assembly; 31. Spacing adjustment rotating rod; 32. Drive gear; 33. Support frame; 34. Rack; 35. Support block; 36. Positioning wire; 4. Hot air regulating component; 41. Threaded rotating rod; 42. Threaded rotating ring; 43. Hot air flow regulating plate; 44. Push rod; 45. Slider; 46. Positioning block. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] like Figure 1-5 As shown, this utility model provides a waste heat utilization device for carbon black thermal power flue gas, including a heat exchange outer tube 1, a support assembly 3 installed inside the heat exchange outer tube 1, an inner heat exchanger 2 for waste heat recovery installed on the support assembly 3, the water inlet and water outlet of the inner heat exchanger 2 both penetrate and extend out of the heat exchange outer tube 1, and hot air regulating components 4 are installed on the air inlet and air outlet of the heat exchange outer tube 1.

[0027] In this embodiment, a connecting pipe 11 is installed on both the air inlet and the outlet of the heat exchange outer tube 1.

[0028] In this embodiment, the internal heat exchanger 2 includes a connector 21 and an internal heat exchange tube 22. There are two connectors 21, which are respectively installed at the top and bottom of the heat exchange outer tube 1. Both connectors 21 are connected to the internal heat exchange tube 22 by a high-temperature resistant rubber hose 23.

[0029] The deoxygenated water for boilers is continuously circulated through the connector 21, high-temperature resistant rubber hose 23, and inner heat exchange tube 22 by a water pump and then flows back. In this way, the high-temperature flue gas of the desulfurization tower, after passing through the outer heat exchange tube 1, will continuously exchange heat with the deoxygenated water for boilers through the inner heat exchanger 2 to heat the deoxygenated water for boilers. This achieves the purpose of heating the deoxygenated water for boilers and cooling the flue gas of the desulfurization tower.

[0030] In this embodiment, the support component 3 includes a support frame 33, a spacing adjustment rotating rod 31 rotatably connected to the support frame 33, a drive gear 32 installed on the spacing adjustment rotating rod 31, and two racks 34 slidably connected to the support frame 33. Both racks 34 mesh with the drive gear 32, and support blocks 35 are installed at opposite ends of the two racks 34. Both support blocks 35 are in contact with the inner heat exchange tube 22.

[0031] One end of the spacing adjustment rotating rod 31.

[0032] The heat exchange tubes 22 are supported inside the outer heat exchange tube 1 by the support assembly 3. While providing support, the support assembly 3 can adjust the distance between the two inner heat exchange tubes 22 according to the actual situation. During adjustment, simply rotate the distance adjustment rotating rod 31 to drive the drive gear 32 to rotate. When the drive gear 32 rotates inside the support frame 33, the two racks 34 are stacked in the center. When the drive gear 32 rotates, it will drive the two racks 34 to move away from each other. Thus, the two inner heat exchange tubes 22 are moved away from each other by the sliding of the two support blocks 35 and the support frame 33. In this process, the positioning wire 36 can cooperate with the support block 35 to achieve the positioning of the inner heat exchange tubes 22.

[0033] A positioning steel wire 36 is installed on the support block 35, and the support block 35 is clamped to the inner heat exchange tube 22 by the positioning steel wire 36.

[0034] In this embodiment, the hot air regulating component 4 includes a threaded rotating rod 41 and a push rod 44. One end of the threaded rotating rod 41 is rotatably connected to the inner wall of the heat exchange outer tube 1, and the other end of the threaded rotating rod 41 passes through and is rotatably connected to the heat exchange outer tube 1. Two positioning blocks 46 are installed on the push rod 44, and two hot air flow regulating plates 43 are rotatably connected to each positioning block 46. Four threaded rotating rings 42 are threadedly connected to the threaded rotating rod 41, and the thread directions of two adjacent threaded rotating rings 42 are opposite. Multiple hot air flow regulating plates 43 are all hinged to adjacent threaded rotating rings 42.

[0035] Both ends of the push rod 44 are equipped with sliders 45, and the inner wall of the heat exchange outer tube 1 is provided with a limiting groove 12. The sliders 45 are slidably connected to the adjacent limiting grooves 12.

[0036] The cross-section of the two adjacent hot airflow regulating plates 43 when viewed from above is V-shaped.

[0037] Two adjacent threaded rotating rings 42 have opposite thread directions, and under the limitation of the hot air flow regulating plate 43, they can drive the two adjacent threaded rotating rings 42 to move closer or further away from each other. When the two threaded rotating rings 42 move closer or further away, the positioning block 46 positioned by the push rod 44 will cause the two hot air flow regulating plates 43 to retract or expand towards each other, and cooperate with the inner wall of the heat exchange outer tube 1 to control the flow rate and fluid area of ​​the hot air flow blowing towards the inner heat exchanger 2 or leaving the heat exchange outer tube 1, so as to adjust the heat exchange form and heat exchange efficiency as needed.

[0038] Furthermore, in this device, each hot air regulating component 4 is equipped with four hot air flow regulating plates 43, two threaded rotating rods 41, and two push rods 44, forming a stable support.

[0039] Furthermore, additional gears or belt drives can be added between adjacent screw-in rotating rods 31 and multiple pitch-adjusting rotating rods 41 to allow the multiple screw-in rotating rods 41 or multiple pitch-adjusting rotating rods 31 to rotate synchronously.

[0040] Furthermore, in the inner heat exchange tube 22, the connection between the bend and the straight section is a rotatable sealed connection, which allows one pitch adjustment lever 31 to control only the bend of that layer, preventing multiple pitch adjustment levers 31 from rotating asynchronously and causing damage to the inner heat exchange tube 22.

[0041] Furthermore, the hot air flow regulating plate 43 inside the hot air regulating component 4 at the air outlet end can be replaced with a filter screen, which can achieve preliminary filtration of the exhaust gas after heat exchange, preventing excessive smoke and dust particles from being discharged or further contaminating the subsequent treatment devices.

[0042] The usage and working principle of this device are as follows: When the device is in operation, firstly connect the air inlet end of the connecting pipe 11 to the flue gas outlet end of the desulfurization tower, and connect the other end of the connecting pipe 11 to other tail gas treatment equipment to ensure that the subsequently discharged gas will not harm the atmosphere. The two connectors 21 are connected to the inlet and outlet ends of the boiler deoxygenated water. The boiler deoxygenated water is continuously driven by the water pump to flow through the connectors 21, the high-temperature resistant rubber hose 23, and the inner heat exchange tube 22 and then flow back. In this way, after the high-temperature flue gas of the desulfurization tower passes through the outer heat exchange tube 1, it will exchange heat with the boiler deoxygenated water through the inner heat exchanger 2 to heat the boiler deoxygenated water. This achieves the purpose of heating the boiler deoxygenated water and cooling the flue gas of the desulfurization tower.

[0043] Inside the outer heat exchanger tube 1, an inner heat exchanger 2 has two inner heat exchanger tubes 22, which are supported by a support assembly 3. While providing support, the support assembly 3 can adjust the distance between the two inner heat exchanger tubes 22 according to the actual situation. During adjustment, simply rotating the distance adjustment rotating rod 31 will drive the drive gear 32 to rotate. When the drive gear 32 rotates in the support frame 33, the two racks 34 are stacked in the center. When the drive gear 32 rotates, it will drive the two racks 34 to move away from each other. Thus, the sliding of the two support blocks 35 and the support frame 33 will drive the two inner heat exchanger tubes 22 to move away from each other. In this process, the positioning wire 36 can cooperate with the support block 35 to achieve the positioning of the inner heat exchanger tubes 22.

[0044] Inside the heat exchanger outer tube 1, there is a set of hot air regulating components 4 on both sides of the inner heat exchanger 2. By rotating the two threaded rotating rods 41, because the threads of the two adjacent threaded rotating rings 42 are opposite, and under the limitation of the hot air flow regulating plate 43, the two adjacent threaded rotating rings 42 can be driven to move closer or further away from each other. When the two threaded rotating rings 42 move closer or further away, the positioning block 46 of the push rod 44 will cause the two hot air flow regulating plates 43 to retract or expand towards each other, which, in conjunction with the inner wall of the heat exchanger outer tube 1, controls the flow rate and fluid area of ​​the hot air blowing towards the inner heat exchanger 2 or leaving the heat exchanger outer tube 1, so as to adjust the heat exchange form and heat exchange efficiency as needed. When the push rod 44 and the positioning block 46 cooperate to limit the position of the hot air flow regulating plate 43, the push rod 44 itself will also move back and forth stably under the cooperation of the slider 45 and the limiting slide groove 12.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A carbon black heat and power flue gas waste heat utilization device, comprising a heat exchange outer tube (1), characterized in that: The heat exchange outer pipe (1) is internally provided with a support assembly (3), the support assembly (3) is provided with a waste heat recovery inner heat exchanger (2), the water inlet end and the water outlet end of the inner heat exchanger (2) are both penetrated and extended out of the heat exchange outer pipe (1), and the air inlet and the air outlet of the heat exchange outer pipe (1) are both provided with hot air adjusting members (4).

2. The carbon black heat and power flue gas waste heat utilization device according to claim 1, characterized in that: The air inlet and the air outlet of the heat exchange outer pipe (1) are both provided with a communication pipe (11).

3. The carbon black heat and power flue gas waste heat utilization device according to claim 1, characterized in that: The inner heat exchanger (2) comprises connecting heads (21) and inner heat exchange pipes (22), the connecting heads (21) are two, the two connecting heads (21) are respectively arranged on the top and the bottom of the heat exchange outer pipe (1), and the connecting heads (21) and the inner heat exchange pipes (22) are both communicated with high-temperature-resistant rubber hoses (23).

4. The carbon black heat and power flue gas waste heat utilization device according to claim 3, characterized in that: The support assembly (3) comprises a support frame (33), the support frame (33) is rotatably connected with a spacing adjusting rotating rod (31), the spacing adjusting rotating rod (31) is provided with a driving gear (32), and the support frame (33) is also slidably connected with two racks (34), the two racks (34) are both meshed with the driving gear (32), and the racks (34) are both provided with support blocks (35) at the opposite ends, and the support blocks (35) are both attached to the inner heat exchange pipes (22); One end of the spacing adjusting rotating rod (31).

5. The carbon black heat and power flue gas waste heat utilization device according to claim 4, characterized in that: The support blocks (35) are provided with positioning steel wires (36), and the support blocks (35) are clamped to the inner heat exchange pipes (22) through the positioning steel wires (36).

6. The carbon black heat and power flue gas waste heat utilization device according to claim 5, characterized in that: The hot air adjusting member (4) comprises a threaded rotating rod (41) and a pushing rod (44), one end of the threaded rotating rod (41) is rotatably connected with the inner wall of the heat exchange outer pipe (1), the other end of the threaded rotating rod (41) is penetrated and rotatably connected with the heat exchange outer pipe (1), the pushing rod (44) is provided with two positioning blocks (46), each positioning block (46) is rotatably connected with two hot gas flow adjusting plates (43), the threaded rotating rod (41) is threadedly connected with four threaded rotating rings (42), the threaded directions of adjacent two threaded rotating rings (42) are opposite, and the plurality of hot gas flow adjusting plates (43) are hinged to adjacent threaded rotating rings (42).

7. The carbon black heat and power flue gas waste heat utilization device according to claim 6, characterized in that: Both ends of the pushing rod (44) are provided with sliding blocks (45), the inner wall of the heat exchange outer pipe (1) is provided with limiting sliding grooves (12), and the sliding blocks (45) are slidably connected with adjacent limiting sliding grooves (12).

8. The carbon black heat and power flue gas waste heat utilization device according to claim 6, characterized in that: The cross section of the two adjacent hot gas flow adjusting plates (43) viewed from above is V-shaped.

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