Flue gas condensation dust removal and heat recovery equipment

Abstract

The utility model provides flue gas condensation dust removal and heat recovery equipment, and belongs to the technical field of desulfurization wastewater treatment. A top-shaped water collecting funnel (6) is arranged in the device, a funnel cover plate (5) is arranged above the water collecting funnel (6), and a condensation water tank (7) is welded to the inner wall of the water collecting funnel (6). Spraying liquid reacted with flue gas can be collected on the funnel cover plate (5), flows into the condensation water tank (7) and spirally descends in a surrounding mode along the inner wall of the water collection funnel (6). By utilizing the device, the temperature of the spray liquid after reaction can be reduced on the basis of desulfurization, dust removal and demisting, the consumption of the cooling liquid is reduced, the subsequent desulfurization wastewater treatment pressure is relieved, meanwhile, heat in flue gas and spray slurry is recycled and stored, and the resource utilization of redundant heat is realized. The device is applied to flue gas desulfurization, dust removal and demisting of a thermal power plant, and can realize resourceful treatment of desulfurization wastewater.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, specifically, to a flue gas condensation dust removal and heat recovery device. Background Technology

[0002] Industrial flue gas contains large amounts of SO2, SO3, dust particles, and waste heat. Based on the need for cleaner production, desulfurization and dust removal treatment of industrial flue gas is necessary. Wet desulfurization and dust removal technology uses water as a medium and is more efficient than other dust collectors, and is currently widely used. However, the flue gas condensation dust removal process releases a large amount of heat, thus requiring a large amount of circulating condensate water, resulting in significant economic costs and hindering the cost reduction and efficiency improvement benefits of desulfurization and dust removal.

[0003] To address this technical problem, a flue gas condensation dust removal and heat recovery device is proposed. This device increases the contact area between flue gas and spray liquid, improves the heat consumption of condensate along the process, and can effectively achieve system cooling and waste heat recovery for subsequent evaporation of desulfurization wastewater, thus realizing low-cost and volume-reduced treatment of desulfurization wastewater. Summary of the Invention

[0004] In order to overcome the problems of existing desulfurization and dust removal technologies in terms of condensation cooling and heat recovery, the purpose of this utility model is to provide a flue gas condensation dust removal and heat recovery device, which increases the contact area between flue gas and spray liquid, improves the heat consumption of condensate along the process, and can effectively realize water and gas cooling and waste heat recovery.

[0005] This utility model provides a flue gas condensation dust removal and heat recovery device, characterized in that the flue gas condensation dust removal and heat recovery device includes 1) an exhaust port, 2) a demister, 3) a spray pipe, 4) a heat exchanger, 5) a funnel cover plate, 6) a water collection funnel, 7) a condensate tank, 8) a water inlet, 9) an annular air inlet, 10) a slurry tank, 11) a spray pump, and 12) a water outlet.

[0006] This utility model provides a flue gas condensation dust removal and heat recovery device, characterized in that the spray liquid is introduced into the device through an inlet (8), and sprayed into the device through a spray pipe (3) under the action of a spray pump (11). After the spray liquid reacts with the sulfides in the flue gas and completes the dust removal process, it falls onto the surface of a funnel cover (5), collects, and flows into a gyroscope-shaped water collection funnel (6) from the edge of the funnel cover. A spiral-shaped condensate trough (7) is provided on the inner wall of the water collection funnel (6). The desulfurized and dust-removed spray liquid spirals down along the condensate trough (7) on the inner wall of the water collection funnel (6), generating heat loss and lowering its temperature along the way, and finally flows into a slurry tank (10) from the bottom of the water collection funnel (6) to complete the desulfurization and dust removal process. After the reaction, the spray liquid is mixed with the replenished spray liquid in the slurry tank (10), and pumped back into the spray pipe (3) by the spray pump (11) for the next cycle of desulfurization and dust removal reaction.

[0007] This utility model provides a flue gas condensation, dust removal, and heat recovery device. The original flue gas enters through an annular inlet (9), passes sequentially through a water collection funnel (6) and a funnel cover (5), disperses within the device, and reacts with the spray liquid. The heat from the flue gas is captured and stored by a heat exchanger (4), used for subsequent desulfurization wastewater evaporation and volume reduction. After desulfurization, dust removal, and demisting by a demister (2), the gas is discharged from the device through an exhaust port (1) at the top.

[0008] This utility model provides a flue gas condensation dust removal and heat recovery device, characterized in that: 6) an asymmetrical concave 7) condensate water tank is welded on the inner wall of the water collecting funnel; the slope is gentler near the inner wall of the water collecting funnel and steeper away from the inner wall of the water collecting funnel, and has a certain height. 5) The spray liquid collected on the funnel cover plate is collected in the 7) condensate water tank and spirals down along the inner wall of the water collecting funnel.

[0009] This utility model provides a flue gas condensation dust removal and heat recovery device, characterized in that: 3) the distribution of spray holes on the spray pipe is uneven, and the density of spray holes near the center of the spray pipe gradually decreases from the position directly above the annular air inlet to the outer edge, and the density of spray holes near the inner wall of the device is the lowest.

[0010] Based on the above-mentioned content of the utility model, the advantages of the flue gas condensation dust removal and heat recovery equipment provided by this utility model are as follows.

[0011] 1. The system includes a built-in water collection funnel, a water collection cover plate, and a condensate tank. After the reaction, the spray liquid is collected along the surface of the water collection cover plate into the condensate tank on the inner wall of the water collection funnel. The liquid then flows in a spiral around the condensate tank, extending the residence time of the spray liquid, achieving cooling, and reducing the amount of condensate used.

[0012] 2. The residual heat of the spray liquid after the reaction and the heat of the flue gas that did not react with the spray liquid in the system are captured by the built-in heat exchanger. The excess heat is collected, stored and reused to realize the recovery of heat in the original flue gas, while reducing the temperature of the desulfurization wastewater and reducing the difficulty of subsequent desulfurization wastewater treatment.

[0013] 3. Based on the diffusion law of flue gas in the equipment, the spray pipe is non-uniformly distributed with spray holes from the center to the four walls. The density of the spray holes decreases as the flue gas concentration decreases, thereby increasing the contact between the spray liquid and the original flue gas and reducing the waste of spray liquid. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of a flue gas condensation dust removal and heat recovery device provided by this utility model.

[0015] The numbers and names of each part are as follows: 1) Exhaust port, 2) Demister, 3) Spray pipe, 4) Heat exchanger, 5) Funnel cover plate, 6) Water collection funnel, 7) Condensate tank, 8) Water inlet, 9) Annular air inlet, 10) Slurry tank, 11) Spray pump, 12) Water outlet.

[0016] Figure 2 A top view schematic diagram of the water collection funnel structure of a flue gas condensation dust removal and heat recovery device provided by this utility model.

[0017] Figure 3 A schematic diagram of the condensate tank structure of a flue gas condensation dust removal and heat recovery device provided by this utility model. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Example 1

[0020] like Figure 1 As shown, the sulfur-containing raw flue gas from the thermal power plant is discharged into the flue gas condensation, dust removal, and heat recovery equipment provided by this utility model through the annular inlet (9). The spray liquid is introduced into the equipment through the water inlet (8) and sprayed into the equipment through the spray pipe (3) under the action of the spray pump (11). The raw flue gas passes through the water collection funnel (6) and the funnel cover plate (5) in sequence, disperses in the equipment, and reacts with the spray liquid. After the spray liquid reacts with the sulfides in the flue gas and completes the spray dust removal, it falls onto the surface of the funnel cover plate (5), collects, and flows into the gyro-shaped water collection funnel (6) from the edge of the funnel cover plate (5). The inner wall of the water collection funnel (6) is provided with a spiral-shaped condensate tank (7). The spray liquid after desulfurization and dust removal spirals down along the condensate tank (7) on the inner wall of the water collection funnel (6), generating heat loss and decreasing temperature along the way. Finally, it flows into the slurry pool (10) from the bottom of the water collection funnel (6) to complete the desulfurization and dust removal process.

[0021] After the reaction, the spray liquid is mixed with the supplementary spray liquid in the slurry tank (10), and then pumped back into the spray pipe (3) by the spray pump (11) for the next cycle of desulfurization and dust removal reaction. The exhaust gas after reacting with the spray liquid passes through the heat exchanger (4) and the demister (2) in sequence to complete desulfurization, dust removal, and demisting, and is then discharged from the equipment through the exhaust port (1) above.

[0022] Example 2

[0023] like Figure 2 As shown, the spray liquid, after reacting with the flue gas, falls onto the funnel cover plate (5), collects on the smooth surface of the arc-shaped funnel cover plate (5), and, under the guiding action of the funnel cover plate (5), collects into the spiral-shaped condensate tank (7) on the water collection funnel (6). Figure 3As shown, 7) the condensate tank is welded to 6) the water collection funnel. Its cross-section is a V-shape with unequal lengths at both ends. The wider upper end can effectively receive the spray liquid flowing down from the funnel cover plate 5). The V-shaped continuous water tank spirals downwards at a certain slope to ensure that the spray liquid can be collected in the condensate tank 7) and spiral downwards, releasing excess heat in the spray liquid after the reaction. The lower end of 7) the condensate tank is connected to 6) the water collection funnel, which is connected to 10) the slurry tank. The cooled spray liquid flows into 10) the slurry tank, mixes with the unreacted spray liquid, and is pumped back into the spray pipe 3) by the spray pump 11) for the next cycle of desulfurization and dust removal reaction.

[0024] The above describes typical embodiments of the present invention. However, the present invention is not limited to the use of the above embodiments, and various modifications or changes can be made within the scope of the claims. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas condensation dust removal and heat recovery device, characterized in that, The flue gas condensation dust removal and heat recovery equipment includes an exhaust port (1), a demister (2), a spray pipe (3), a heat exchanger (4), a funnel cover plate (5), a water collection funnel (6), a condensate tank (7), a water inlet (8), an annular air inlet (9), a slurry pool (10), a spray pump (11), and a water outlet (12). The flue gas condensation dust removal and heat recovery equipment is equipped with a gyroscope-shaped water collection funnel (6), and a funnel cover plate (5) is provided above the water collection funnel (6). A condensate tank (7) with a certain slope is welded to the inner wall of the water collection funnel (6). The lower part of the condensate tank (7) is connected to the slurry pool (10) through the bottom end of the water collection funnel (6). The spray liquid after reacting with the flue gas can be collected on the funnel cover plate (5), flow into the condensate tank (7), and spiral down along the inner wall of the water collection funnel (6) and finally flow into the slurry pool (10).

2. The flue gas condensation dust removal and heat recovery equipment according to claim 1, characterized in that, The spray liquid is introduced into the equipment through the inlet (8) and sprayed into the equipment through the spray pipe (3) under the action of the spray pump (11). After the spray liquid reacts with the sulfides in the flue gas to complete the spray dust removal, it falls onto the surface of the funnel cover plate (5) and flows into the gyroscope-shaped water collection funnel (6) from the edge of the funnel cover plate (5). The inner wall of the water collection funnel (6) is provided with a spiral-shaped condensate tank (7). The spray liquid after desulfurization and dust removal spirals down along the condensate tank (7) on the inner wall of the water collection funnel (6), generating heat loss along the way and lowering the temperature. Finally, it flows into the slurry pool (10) from the bottom of the water collection funnel (6) to complete the desulfurization and dust removal process. After the reaction, the spray liquid is mixed with the supplementary spray liquid in the slurry pool (10) and pumped back into the spray pipe (3) by the spray pump (11) for the next cycle of desulfurization and dust removal reaction.

3. The flue gas condensation dust removal and heat recovery equipment according to claim 1, characterized in that, The distribution of spray holes on the spray pipe (3) is uneven. The density of spray holes gradually decreases from the center of the spray pipe outwards, and the density of spray holes is lowest near the inner wall of the equipment.

4. The flue gas condensation dust removal and heat recovery equipment according to claim 1, characterized in that, The original flue gas enters through the annular inlet (9), passes through the water collection funnel (6) and the funnel cover plate (5) in sequence, disperses in the equipment and reacts with the spray liquid; the heat of the flue gas is captured and stored by the heat exchanger (4) for subsequent desulfurization wastewater evaporation and reduction, and after the desulfurization, dust removal and demisting are completed by the demister (2), it is discharged from the equipment through the exhaust port (1) above.

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