Carbon black tail gas waste heat recovery device

Abstract

The utility model belongs to the technical field of waste heat recovery, and particularly relates to a carbon black tail gas waste heat recovery device which comprises a heat exchanger. One end of the heat exchanger is provided with a fluid inlet and a fluid outlet, and the other end of the heat exchanger is provided with an end seat which is connected with the dust removal box; a dust removal electrostatic plate is arranged in the dust removal box; a heat conduction mechanism is arranged in the end seat and the dust removal mechanism; and a positive pressure mechanism is arranged in the end seat. Due to the fact that the dedusting electrostatic plate is connected with the heat conduction rod, heat received by the dedusting electrostatic plate can be transmitted to the heat conduction rod. A heat conducting disc is arranged at the other end of the heat conducting rod and is positioned in the end seat; therefore, heat on the dust removal electrostatic plate finally flows to the heat conduction disc. The positive pressure mechanism not only can suck the tail gas in the dust removal box into the end seat, but also can blow the tail gas in the end seat into the heat exchanger; in the air blowing process, heat on the heat exchange disc can enter the heat exchanger together, and heat waste is avoided.

Description

Technical Field

[0001] This utility model relates to a waste heat recovery device, specifically a waste heat recovery device for carbon black tail gas, and belongs to the technical field of waste heat recovery devices. Background Technology

[0002] The exhaust gas generated during carbon black production contains a large amount of waste heat. Recovering this waste heat will bring economic benefits, environmental benefits, and improved energy efficiency. Typically, waste heat from carbon black exhaust gas is collected using heat exchangers. However, carbon black exhaust gas contains a large amount of impurities. If these impurities directly enter the heat exchanger, they will eventually clog the heat exchange tubes, and heat exchangers are very difficult to clean. Therefore, in existing technologies, an electrostatic precipitator is usually added before the exhaust gas enters the heat exchanger. However, to improve the dust removal effect, the contact area between the electrostatic precipitator plate and the exhaust gas needs to be increased. This results in a large amount of waste heat in the exhaust gas being absorbed by the electrostatic plate and not entering the heat exchange tubes along with the exhaust gas, causing a significant heat loss. If other dust removal methods are used, such as filters or activated carbon filtration, as disclosed in Chinese Patent Document CN113757631A (a waste heat recycling device for a carbon black exhaust gas combustion furnace), the heat loss will be even greater because the filter needs to be in direct contact with the exhaust gas.

[0003] Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a carbon black tail gas waste heat recovery device, which improves heat utilization efficiency, reduces heat loss, has a simple and reasonable structure, and also takes into account the tail gas dust removal function.

[0005] A waste heat recovery device for carbon black tail gas includes a heat exchanger; one end of the heat exchanger is provided with a fluid inlet and a fluid outlet, and the other end is provided with an end seat, which is connected to a dust collection box; a dust removal electrostatic plate is provided inside the dust collection box; a heat conduction mechanism is provided inside the end seat and the dust removal mechanism; and a positive pressure mechanism is provided inside the end seat.

[0006] Furthermore, the dust removal electrostatic plate includes an upper dust removal plate and a lower dust removal plate; the upper dust removal plate and the lower dust removal plate are each composed of two electrostatic plates joined together, and the adsorption surfaces of the other electrostatic plates are opposite.

[0007] Furthermore, the upper and lower dust removal plates have arc-shaped cross-sections; the heat conduction mechanism includes an outer frame; the outer frame is arranged around the outer edge of the upper and lower dust removal plates.

[0008] Furthermore, one end of the outer frame is connected to the dust collection box, and the other end is connected to the heat-conducting rod; the heat-conducting rod passes through the dust collection box and extends into the end seat.

[0009] Furthermore, the heat-conducting mechanism also includes a heat-conducting plate; the heat-conducting plate is located at the end; and the heat-conducting plate has several through holes relative to the heat exchanger inlet.

[0010] Furthermore, an exhaust gas passage is provided between the end seat and the dust collection box; the positive pressure mechanism is located inside the exhaust gas passage; the positive pressure mechanism is a positive pressure fan.

[0011] Furthermore, the heat-conducting rod is located in the radial extension direction of the exhaust gas through hole; the end seat and the dust collector are provided with mounting holes relative to the heat-conducting rod.

[0012] This invention has the following advantages: By connecting the dust collector box to the end seat and connecting the dust collector electrostatic plate inside the dust collector box to the heat-conducting rod, when the exhaust gas passes through the dust collector box, the impurities inside will be adsorbed by the dust collector electrostatic plate. However, since some of the exhaust gas will come into contact with the electrostatic dust collector plate, some heat will be transferred to the dust collector electrostatic plate and cannot enter the end seat and the heat exchanger with the exhaust gas. In this invention, since the dust collector electrostatic plate is connected to the heat-conducting rod, the heat received by the dust collector electrostatic plate will be transferred to the heat-conducting rod. Moreover, a heat-conducting plate is provided at the other end of the heat-conducting rod and is located inside the end seat. Therefore, the heat on the dust collector electrostatic plate will eventually reach the heat-conducting plate. The positive pressure mechanism can not only draw the exhaust gas in the dust collector box into the end seat, but also blow the exhaust gas in the end seat into the heat exchanger. During the blowing process, the heat on the heat exchange plate will also enter the heat exchanger, so as not to waste heat. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the cross-section of the dust removal electrostatic plate.

[0015] Figure 3 This is a schematic diagram of the heat transfer plate.

[0016] In the diagram: 1 is the heat exchanger, 2 is the end seat, 3 is the dust collector, 4 is the upper dust collector plate, 5 is the lower dust collector plate, 6 is the outer frame, 7 is the heat-conducting rod, 8 is the heat-conducting plate, 8-1 is the through hole, 9 is the exhaust gas through hole, and 10 is the positive pressure fan. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] See Figures 1-3This application discloses a carbon black tail gas waste heat recovery device, including a heat exchanger 1; one end of the heat exchanger 1 is provided with a fluid inlet and a fluid outlet, and the other end is provided with an end seat 2, which is connected to a dust collection box 3; a dust removal electrostatic plate is provided inside the dust collection box 3; a heat conduction mechanism is provided inside the end seat 2 and the dust removal mechanism; and a positive pressure mechanism is provided inside the end seat 2.

[0019] Furthermore, the dust removal electrostatic plate includes an upper dust removal plate 4 and a lower dust removal plate 5; the upper dust removal plate 4 and the lower dust removal plate 5 are each composed of two electrostatic plates joined together, and the adsorption surfaces of the two electrostatic plates are opposite.

[0020] Furthermore, the upper dust removal plate 4 and the lower dust removal plate 5 have arc-shaped cross sections; the heat conduction mechanism includes an outer frame 6; the outer frame 6 is arranged around the outer edge of the upper dust removal plate 4 and the lower dust removal plate 5.

[0021] Furthermore, one end of the outer frame 6 is connected to the dust collection box 3, and the other end is connected to the heat-conducting rod 7; the heat-conducting rod 7 passes through the dust collection box 3 and extends into the end seat 2.

[0022] Furthermore, the heat conduction mechanism also includes a heat conduction plate 8; the heat conduction plate 8 is disposed at the end of the heat conduction rod 7; the heat conduction plate 8 has several through holes 8-1 opened on it relative to the heat exchanger inlet.

[0023] The heat-conducting plate 8, the heat-conducting rod 7, and the outer frame 6 are all made of high thermal conductivity metal.

[0024] Furthermore, an exhaust gas passage 9 is provided between the end seat 2 and the dust collection box 3; the positive pressure mechanism is located inside the exhaust gas passage 9; the positive pressure mechanism is a positive pressure fan 10.

[0025] Furthermore, the heat-conducting rod 7 is located in the radial extension direction of the exhaust gas through hole 9; the end seat 2 and the dust collector 3 are provided with mounting holes relative to the heat-conducting rod 7.

[0026] Working principle: The end seat 2 and the dust collection box 3 are connected by the exhaust gas passage 9, and a positive pressure fan 10 is installed in the exhaust gas passage 9. During the operation of the positive pressure fan 10, the exhaust gas will be promoted to enter the end seat 2 from the dust collection box 3 and then enter the heat exchanger 1 from the end seat 2. At the same time, since the upper dust collection plate 4 and the lower dust collection plate 5 are distributed in the dust collection box 3 and have a double-sided adsorption mode, a large amount of impurities in the exhaust gas will be adsorbed, and a large amount of heat will also be transferred to the upper dust collection plate 4 and the lower dust collection plate 5. For this purpose, an outer frame 6 is specially set on the outside of the upper dust collection plate 4 and the lower dust collection plate 5. The outer frame 6 is then connected to the heat conduction rod 7, and the heat conduction rod 7 is then connected to the heat conduction plate 8, thereby transferring the heat from the upper dust collection plate 4 and the lower dust collection plate 5 to the heat conduction plate 8 in the end seat, and finally entering the heat exchanger with the positive pressure airflow.

[0027] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A waste heat recovery device for carbon black tail gas, comprising a heat exchanger (1); one end of the heat exchanger (1) is provided with a fluid inlet and a fluid outlet, and the other end is provided with an end seat (2), characterized in that: The end seat (2) is connected to the dust collection box (3); the dust collection box (3) is equipped with a dust removal electrostatic plate; the end seat (2) and the dust removal mechanism are equipped with a heat conduction mechanism; the end seat (2) is equipped with a positive pressure mechanism.

2. The carbon black tail gas waste heat recovery device according to claim 1, characterized in that: The dust removal electrostatic plate includes an upper dust removal plate (4) and a lower dust removal plate (5); the upper dust removal plate (4) and the lower dust removal plate (5) are each composed of two electrostatic plates joined together, and the adsorption surfaces of the two electrostatic plates are opposite.

3. The carbon black tail gas waste heat recovery device according to claim 2, characterized in that: The upper dust removal plate (4) and the lower dust removal plate (5) have arc-shaped cross sections; the heat conduction mechanism includes an outer frame (6); the outer frame (6) is arranged around the outer edge of the upper dust removal plate (4) and the lower dust removal plate (5).

4. The carbon black tail gas waste heat recovery device according to claim 3, characterized in that: One end of the outer frame is connected to the dust collection box (3), and the other end is connected to the heat-conducting rod; the heat-conducting rod (7) passes through the dust collection box (3) and extends into the end seat (2).

5. The carbon black tail gas waste heat recovery device according to claim 4, characterized in that: The heat conduction mechanism also includes a heat conduction plate (8); the heat conduction plate (8) is located at the end of the heat conduction rod (7); the heat conduction plate (8) has several through holes (8-1) relative to the heat exchanger inlet.

6. The carbon black tail gas waste heat recovery device according to claim 5, characterized in that: An exhaust gas passage (9) is provided between the end seat (2) and the dust collection box (3); the positive pressure mechanism is located in the exhaust gas passage (9); the positive pressure mechanism is a positive pressure fan (10).

7. The carbon black tail gas waste heat recovery device according to claim 6, characterized in that: The heat-conducting rod (7) is located in the radial extension direction of the exhaust gas through hole (9); the end seat (2) and the dust collector (3) are provided with mounting holes relative to the heat-conducting rod (7).

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