Flue gas condensate water recovery device

Abstract

The utility model discloses a flue gas condensate recovery device which comprises a condensing box, a buffer box and a PH adjusting box, the outer walls of the two sides of the condensing box are provided with an air inlet and an air outlet respectively, the bottom of the condensing box is fixedly provided with a plurality of convex grooves, the bottom ends of the convex grooves are fixedly communicated with water outlet pipes, and the water outlet pipes are provided with electromagnetic valves; a floating ball liquid level switch is mounted on the outer wall of the convex groove in a penetrating manner; through the arrangement of the condensing box, the snake-shaped heat exchange pipe, the convex groove and the like, after entering the condensing box, flue gas can be in contact with the snake-shaped heat exchange pipe, water contained in the flue gas can be condensed on the snake-shaped heat exchange pipe to form small water drops, cooling water in the snake-shaped heat exchange pipe is heated, the small water drops are gathered in the convex groove, and the heat exchange efficiency is improved. By arranging the water outlet pipe, the floating ball liquid level switch, the electromagnetic valve and the like, condensate water in the convex groove can be discharged and kept within a certain liquid level height range, so that smoke is prevented from being discharged from the backflow pipe, smoke waste heat and condensate water are recycled, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a condensed water recovery device, in particular to a flue gas condensed water recovery device. Background Art

[0002] After desulfurization and denitrification treatment, boiler flue gas will contain a large amount of water vapor. If it is discharged directly, it will cause a waste of water resources and lead to heat loss. Therefore, the treated flue gas needs to be condensed to recover the condensed water and heat.

[0003] After searching, the patent with announcement number CN219319085U discloses a high-efficiency and low-resistance condenser, which sets up a box body, installs a cooling pipe in the box body, and introduces flue gas into the cooling pipe through an air inlet pipe, thereby introducing water into the box body through a water inlet pipe, so that the water in the box body is heated to a certain extent by the high-temperature flue gas. At the same time, a circulation pipe is set on the box body to increase the heating speed of the water in the box body, and after the heating is completed, the heated water in the box body can be discharged through the first water pump body, and the cooled flue gas can be discharged through the outlet pipe, thereby achieving the effect of cooling the flue gas and heating the water inlet of the natural gas boiler.

[0004] Although the above scheme can recover the heat of the flue gas, since the flue gas passes directly through the air inlet pipe, the cooling pipe and the air outlet pipe from the box, the condensed water generated during the heat exchange process will gather at several lower bends of the cooling pipe and cannot be discharged. Therefore, the condensed water cannot be recovered and the circulation of the flue gas in the cooling pipe will be hindered. For this reason, we propose a flue gas condensed water recovery device. Utility Model Content

[0005] The purpose of the utility model is to provide a flue gas condensate water recovery device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A flue gas condensate water recovery device comprises a condensate box, a cache box and a pH regulating box, the outer walls of both sides of the condensate box are respectively provided with an air inlet and an air outlet, a plurality of convex grooves are fixedly installed at the bottom of the condensate box, the bottom ends of the convex grooves are fixedly connected with water outlet pipes, the water outlet pipes are installed with solenoid valves, the outer walls of the convex grooves are penetrated and installed with float liquid level switches, a plurality of serpentine heat exchange tubes are arranged in the condensate box, the water inlet ends of the serpentine heat exchange tubes are connected with a cooling water supply pipe after passing through the outside of the condensate box, the water outlet ends of the serpentine heat exchange tubes are connected with a cooling water reflux pipe after passing through the outside of the condensate box, the plurality of water outlet pipes are commonly connected with a confluence pipe, the water outlet end of the confluence pipe is connected with a cache box, the cache box is connected with a pH regulating box through a water supply pipe, and a first water pump is installed on the water supply pipe.

[0008] As a further solution of the utility model: the bottom inner wall of the condensation box located between each two convex grooves is fixedly connected with a second partition, the top end of the second partition is in contact with the inner wall of the condensation box, and the first partition is fixedly installed on both sides of each second partition in the condensation box, the first partition is located directly above the corresponding convex groove, and multiple first partitions and second partitions divide the interior of the condensation box into a serpentine flue gas flow duct, and the air inlet and the air outlet are respectively connected to the two ends of the serpentine flue gas flow duct.

[0009] As a further solution of the utility model: liquid level sensors are installed on both the cache box and the PH regulating box, a second water pump is fixedly installed on the PH regulating box, and a water suction pipe of the second water pump is located in the PH regulating box.

[0010] As a further solution of the utility model: a PH sensor is installed through the outer wall of the PH regulating box, a dosing pump is fixedly installed on the PH regulating box, and a water outlet end of the dosing pump is connected to the PH regulating box.

[0011] As a further solution of the utility model: a stirring motor is fixedly installed on the top of the pH regulating box, and the output shaft of the stirring motor is connected to a stirring rod after penetrating into the pH regulating box.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model arranges a condensation box, a serpentine heat exchange tube, a convex groove, etc. After the flue gas enters the condensation box, it will contact the serpentine heat exchange tube. The moisture contained in the flue gas will condense on the serpentine heat exchange tube to form small water droplets, and heat the cooling water in the serpentine heat exchange tube. The small water droplets gather in the convex groove. By arranging a water outlet pipe, a float liquid level switch, an electromagnetic valve, etc., the condensed water in the convex groove can be discharged and maintained within a certain liquid level height range, thereby avoiding the flue gas from being discharged from the reflux pipe, so as to realize the recovery of the flue gas waste heat and condensed water, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a structural schematic diagram of a flue gas condensate water recovery device.

[0015] Figure 2 The present invention is a structural schematic diagram of a condensation box in a flue gas condensate water recovery device.

[0016] Figure 3 The figure is a structural block diagram of a flue gas condensate water recovery device.

[0017] Among them, there are a condensation box 1, an air inlet 2, an air outlet 3, a convex groove 4, a water outlet pipe 5, a solenoid valve 6, a float liquid level switch 7, a first partition 8, a second partition 9, a serpentine heat exchange tube 10, a cooling water supply pipe 11, a cooling water return pipe 12, a conduit 13, a cache box 14, a water supply pipe 15, a first water pump 16, a PH regulating box 17, a second water pump 18, a dosing pump 19, a PH sensor 20, a stirring motor 21, a stirring rod 22, a liquid level sensor 23, and a programmable controller 24. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation in the specification, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0022] See also Figures 1 to 3In the embodiment of the utility model, a flue gas condensate water recovery device includes a programmable controller 24, a condensate box 1, a buffer box 14 and a PH adjustment box 17. The outer walls of the two sides of the condensate box 1 are respectively provided with an air inlet 2 and an air outlet 3. The bottom of the condensate box 1 is fixedly installed with a plurality of convex grooves 4. The bottom ends of the convex grooves 4 are fixedly connected with water outlet pipes 5. The water outlet pipes 5 are installed with solenoid valves 6. The outer walls of the convex grooves 4 are penetrated and installed with a float liquid level switch 7. The condensate box 1 A plurality of serpentine heat exchange tubes 10 are arranged inside, the water inlet end of the serpentine heat exchange tube 10 passes through the outside of the condensation box 1 and is connected to the cooling water supply pipe 11, the water outlet end of the serpentine heat exchange tube 10 passes through the outside of the condensation box 1 and is connected to the cooling water return pipe 12, the plurality of outlet pipes 5 are commonly connected to a manifold 13, the water outlet end of the manifold 13 is connected to a cache box 14, the cache box 14 is connected to a PH adjustment box 17 through a water supply pipe 15, and a first water pump 16 is installed on the water supply pipe 15.

[0023] The utility model adopts the above scheme. When in use, the flue gas after desulfurization and denitrification is introduced into the condensation box 1 through the air inlet 2. The flue gas will contact the serpentine heat exchange tube 10 and then be discharged from the air outlet 3. The water contained in the flue gas will condense on the serpentine heat exchange tube 10 to form small water droplets, and heat the cooling water in the serpentine heat exchange tube 10. The small water droplets drip down along the serpentine heat exchange tube 10 and gather in the convex groove 4. When the condensed water level in the convex groove 4 rises to a certain height, the float liquid level switch 7 will be triggered to make the programmable The controller 24 opens the solenoid valve 6, thereby discharging the condensed water in the convex groove 4 from the outlet pipe 5 into the confluence pipe 13. When the liquid level in the convex groove 4 drops to a certain height, the float liquid level switch 7 will be triggered again, so that the programmable controller 24 closes the solenoid valve 6 to retain some condensed water in the convex groove 4, thereby preventing the smoke from being discharged from the reflux pipe 13. After the condensed water enters the buffer box 14 through the reflux pipe 13, it will be pumped into the pH regulating box 17 by the first water pump 16 to adjust the pH of the condensed water so that it meets the requirements of recycling.

[0024] Specific combination Figure 2 In one embodiment of the utility model, the bottom inner wall of the condensation box 1 between each two convex grooves 4 is fixedly connected with a second partition plate 9, and the top end of the second partition plate 9 contacts the inner wall of the condensation box 1. The condensation box 1 is fixedly installed with a first partition plate 8 on both sides of each second partition plate 9, and the first partition plate 8 is located directly above the corresponding convex groove 4. Multiple first partition plates 8 and second partition plates 9 divide the interior of the condensation box 1 into a serpentine flue gas flow passage, and the air inlet 2 and the air outlet 3 are respectively connected to the two ends of the serpentine flue gas flow passage.

[0025] By utilizing a plurality of first partitions 8 and second partitions 9 to divide the interior of the condensation box 1 into a serpentine flue gas flow passage, the time for the flue gas to pass through the condensation box 1 can be extended, thereby allowing the flue gas to more fully contact the serpentine heat exchange tube 10, thereby improving the recovery rate of condensed water and flue gas waste heat.

[0026] Specific combination Figure 1 In one embodiment of the utility model, a liquid level sensor 23 is installed on both the cache box 14 and the PH regulating box 17 , a second water pump 18 is fixedly installed on the PH regulating box 17 , and a water suction pipe of the second water pump 18 is located inside the PH regulating box 17 .

[0027] By setting the liquid level sensor 23, the programmable controller 24 can monitor the liquid level heights of the cache box 14 and the pH adjustment box 17. When the liquid level in the cache box 14 reaches the set height, the first water pump 16 is started to pump the condensed water in the cache box 14 into the pH adjustment box 17. When the condensed water in the pH adjustment box 17 reaches the set height, the pH adjustment of the condensed water is started, and the condensed water that has completed the pH adjustment is pumped out through the second water pump 18.

[0028] Specific combination Figure 1 and Figure 3 On the basis of the previous embodiment, a PH sensor 20 is installed on the outer wall of the PH regulating box 17 , a dosing pump 19 is fixedly installed on the PH regulating box 17 , and a water outlet end of the dosing pump 19 is connected to the PH regulating box 17 .

[0029] Furthermore, a stirring motor 21 is fixedly installed on the top of the pH regulating box 17 , and an output shaft of the stirring motor 21 is inserted into the pH regulating box 17 and connected to a stirring rod 22 .

[0030] The programmable controller 24 can monitor the pH value of the condensed water in the pH regulating box 17 through the pH sensor 20, and pump the pH regulator into the pH regulating box 17 through the dosing pump 19 for multiple times, so as to ensure the accuracy of the pH regulation of the cooling water. In the process of adjusting the pH, the stirring motor 21 is started to drive the stirring rod 22 to rotate, which can stir the condensed water in the pH regulating box 17, so that the pH regulator and the condensed water are quickly and evenly mixed to improve the efficiency of the pH regulation.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flue gas condensate recovery device, characterized in that: The invention comprises a condensation box (1), a buffer box (14) and a pH adjustment box (17), wherein the outer walls on both sides of the condensation box (1) are respectively provided with an air inlet (2) and an air outlet (3), a plurality of convex grooves (4) are fixedly installed at the bottom of the condensation box (1), the bottom ends of the convex grooves (4) are fixedly connected with water outlet pipes (5), and the water outlet pipes (5) are installed with solenoid valves (6), and the outer walls of the convex grooves (4) are penetrated and installed with a float liquid level switch (7), and a plurality of serpentine heat exchange tubes (10) are arranged in the condensation box (1), The water inlet end of the serpentine heat exchange tube (10) passes through the condensation box (1) and is connected to the cooling water supply pipe (11); the water outlet end of the serpentine heat exchange tube (10) passes through the condensation box (1) and is connected to the cooling water return pipe (12); a plurality of the water outlet pipes (5) are connected to a common manifold (13); the water outlet end of the manifold (13) is connected to a buffer box (14); the buffer box (14) is connected to a pH adjustment box (17) via a water supply pipe (15), and a first water pump (16) is installed on the water supply pipe (15).

2. A flue gas condensate recovery device according to claim 1, characterized in that: The bottom inner wall of the condensing box (1) between each two convex grooves (4) is fixedly connected with a second partition (9), and the top end of the second partition (9) contacts the inner wall of the condensing box (1). The first partition (8) is fixedly installed on both sides of each second partition (9) in the condensing box (1), and the first partition (8) is located directly above the corresponding convex groove (4). The plurality of the first partitions (8) and the second partitions (9) divide the interior of the condensing box (1) into a serpentine flue gas flow passage, and the air inlet (2) and the air outlet (3) are respectively connected to the two ends of the serpentine flue gas flow passage.

3. A flue gas condensate recovery device according to claim 1, characterized in that: The buffer box (14) and the pH regulating box (17) are both equipped with liquid level sensors (23), the pH regulating box (17) is fixedly equipped with a second water pump (18), and a water pumping pipe of the second water pump (18) is located inside the pH regulating box (17).

4. The flue gas condensate recovery device according to claim 1, characterized in that: A pH sensor (20) is installed through the outer wall of the pH regulating box (17), and a dosing pump (19) is fixedly installed on the pH regulating box (17), and the water outlet end of the dosing pump (19) is connected to the pH regulating box (17).

5. A flue gas condensate recovery device according to claim 4, characterized in that: A stirring motor (21) is fixedly mounted on the top of the pH regulating box (17), and an output shaft of the stirring motor (21) is inserted into the pH regulating box (17) and connected to a stirring rod (22).

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