A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower

Abstract

The utility model discloses a three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower, comprising a tower body made of glass fiber reinforced plastic, wherein an upper spray layer and a lower spray layer are arranged in the tower body; the tower body is connected with an air intake short pipe, an exhaust port, a first circulation water pipe, a second circulation water pipe, and a third circulation water pipe; the air intake short pipe is connected with an activated carbon solid-liquid purification device, and the activated carbon solid-liquid purification device is connected with a water tank through a fourth circulation water pipe via a double-port water pump; the activated carbon solid-liquid purification device is directly connected with the water tank through a fourth circulation water pipe; the activated carbon solid-liquid purification device is connected with the air intake. The beneficial effects of the utility model are that by adding the flue gas circulation process and the waste heat utilization and circulation liquid state detection functions, the flue gas absorption efficiency is greatly enhanced, and the service life of the spray tower is extended.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas spraying, in particular to a three-stage waste heat utilization glass fiber reinforced plastic circulation spraying tower. Background Art

[0002] At present, in terms of environmental protection equipment, FRP circulating spray towers are widely used in chemical plants and various raw material manufacturers for waste smoke and waste gas recovery. They have the advantages of low cost and simple maintenance. However, the structure of the spray towers on the market is still imperfect. For example, since the circulating water used for filtering the gas is an acidic or alkaline solution, after long-term use of the spray tower, it is easy to cause crystallization and corrosion damage to the spray head and packing layer; in severe cold weather, the circulating water is easy to cause ice damage to the spray tower equipment; high-temperature waste flue gas directly enters the spray tower for purification, and a large amount of waste heat contained in it is wasted, and the high-temperature gas dissolves in water, causing the water temperature to rise and the solubility to decrease, resulting in a decrease in the spray absorption efficiency. If the quality of the final exhaust gas does not meet the standards, it will not only pollute the environment, but also affect normal production.

[0003] Chinese utility model patent publication number CN213790891U discloses a detachable and easily maintainable waste gas spray tower, including a waste gas spray tower body, a spray tower water supply conduit, a spray tower air guide bend, a spray tower water outlet base, and a spray tower waste gas partition. The top of the waste gas spray tower body is provided with a spray tower air guide bend, the bottom of the spray tower air guide bend is provided with a spray tower waste gas partition, the side of the spray tower waste gas partition is provided with a spray tower water supply conduit, and the bottom of the spray tower waste gas partition is provided with a spray tower water outlet base. The patent focuses on solving the current problem of rapid assembly or disassembly, and does not involve the problem of improving the utilization of waste heat from waste flue gas. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing high-temperature flue gas emission does not meet the standard, and for this purpose a three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower is provided.

[0005] The technical solution of the utility model is: a three-stage waste heat utilization glass fiber reinforced plastic circulating spray tower, comprising: a tower body; an activated carbon solid-liquid purification device, the activated carbon solid-liquid purification device is connected to the side wall of the tower body through an air inlet short pipe; an exhaust port, the exhaust port is opened at the top of the tower body; a purification U-shaped pipe, one end of the purification U-shaped pipe is connected to the exhaust port; a fan, the air inlet of the fan is connected to the other end of the purification U-shaped pipe; a water tank, the water tank is connected to the side wall of the tower body through a third circulation pipeline; a single-outlet water pump, the single-outlet water pump is connected to the purification U-shaped pipe through a fifth circulation pipeline; a double-outlet water pump, one outlet of the double-outlet water pump is connected to a main water pipe extending upward, the main water pipe is connected to a first circulation water pipe and a second circulation water pipe located at different heights, the first circulation water pipe and the second circulation water pipe are respectively connected to the side wall of the tower body; a fourth circulation water pipe, the fourth circulation water pipe is connected between the other outlet of the double-outlet water pump and the activated carbon solid-liquid purification device.

[0006] The improvement of the above scheme is that the activated carbon solid-liquid purification device is connected to the water tank through the sixth circulating water pipe.

[0007] A further improvement of the above solution is that the air outlet of the fan is connected to a short air outlet.

[0008] A further improvement of the above solution is that a rainproof cover is provided on the top of the short air outlet.

[0009] Another improvement of the above solution is that an activated carbon replacement port is provided on the side of the activated carbon solid-liquid purification device.

[0010] In the above scheme, an upper packing layer, a lower packing layer, an upper spraying layer and a lower spraying layer are distributed in the tower body at intervals from top to bottom.

[0011] Another improvement of the above scheme is that a water quality detector and a water removal and drying layer are provided in the purification U-shaped tube.

[0012] The upper spray layer in the above solution includes an upper fixing frame and a plurality of upper pipes built in the upper fixing frame, and the upper pipes are connected to a single-side spray port.

[0013] The lower spray layer in the above solution includes a lower fixing frame and a plurality of lower pipes built into the upper fixing frame, and the lower pipes are connected with double-sided spray ports.

[0014] The activated carbon solid-liquid purification device described in the above scheme is equipped with an activated carbon filling box.

[0015] The beneficial effects of the utility model are that by increasing the flue gas circulation process and the waste heat utilization and circulating liquid status detection functions, the flue gas absorption efficiency is greatly enhanced and the service life of the spray tower is extended; the waste heat of the flue gas can be utilized to form a natural movement in the water tank through the convection effect of the hot circulating liquid, thereby achieving uniform mixing of the circulating liquid in the water tank without additional energy consumption; a three-stage purification is adopted, firstly, the initial purification is achieved through the activated carbon solid-liquid purification device, then the main purification is carried out through the spraying of the spray tower, and finally the final purification and inspection are carried out through the purification U-tube, thereby effectively improving the purification effect; (3) the three-stage purification and the introduction of the water quality detector are conducive to avoiding the occurrence of poor circulating water quality and effectively extending the service life of the spray tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the tower body of the utility model;

[0018] Figure 3 This is a cross-sectional view of the purification U-shaped tube of the utility model;

[0019] Figure 4 It is a schematic diagram of the upper spraying layer of the utility model;

[0020] Figure 5 It is a schematic diagram of the lower spray layer of the utility model;

[0021] Figure 6 It is a cross-sectional view of the activated carbon solid-liquid purification device of the utility model;

[0022] Figure 7 It is a side view of the activated carbon solid-liquid purification device of the utility model;

[0023] In the figure, 1, tower body, 2, activated carbon solid-liquid purification device, 3, water tank, 4, single-port water pump, 5, double-port water pump, 11, air inlet, 12, air inlet short pipe, 13, sixth circulating water pipe, 14, fourth circulating water pipe, 15, third circulating water pipe, 16, fifth circulating water pipe, 17, second circulating water pipe, 18, main water pipe, 19, first circulating water pipe, 20, exhaust port, 21, purification U-shaped pipe, 22, fan, 23. Short air outlet, 24. Rainproof top cover, 25. Upper filling layer, 26. Lower filling layer, 27. Dehydration and drying layer, 28. Water quality detector, 29. Activated carbon filling box, 30. Activated carbon replacement port, 31. Circulating water renewal port, 40. Upper spray layer, 41. Single-side spray port, 42. Upper fixing frame, 43. Upper pipeline, 50. Lower spray layer, 51. Double-side spray ports, 52. Lower fixing frame, 53. Lower pipeline. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiment of the utility model is clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments of ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0025] like Figure 1-7 As shown, a three-stage waste heat utilization glass fiber reinforced plastic circulating spray tower includes a tower body 1 for main purification, a pre-purification activated carbon solid-liquid purification device 2 and a purification U-tube 21 for final purification and inspection.

[0026] As an embodiment of the utility model, the tower body 1 is provided with an upper spray layer 40, a lower spray layer 50, an upper packing layer 25, and a lower packing layer 26, and the upper and lower spray layers and the upper and lower packing layers are alternately distributed; the packing layer is filled with other materials with corrosion resistance and durability such as polyethylene or polypropylene. After the flue gas enters the tower body 1 through the air intake short pipe 12, it contacts with the spray water and the upper packing layer 25 and the lower packing layer 26. Since the upper packing layer 25 and the lower packing layer 26 are covered with spray water, the spray water can contact with the exhaust gas well to absorb the exhaust gas.

[0027] As an embodiment of the utility model, the upper spray layer 40 includes a single-sided spray port 41, an upper fixing frame 42, and an upper pipe 43; the upper fixing frame 42 is welded to the inner wall of the tower body 1, the upper pipe 43 is fixed on the upper fixed copper frame 42, the single-sided spray port 41 is fixed on the upper pipe 43, and the upper pipe 43 realizes spraying by pumping water from the water tank 3 through the main water pipe 18 and the single-port water pump 5 connected to the first circulation pipe 19.

[0028] As an embodiment of the utility model, the lower spray layer 50 includes a double-sided spray port 51, a lower fixing frame 52, and a lower pipe 53; the lower fixing frame 52 is welded to the inner wall of the tower body 1, the lower pipe 53 is fixed on the lower fixing frame 52, the double-sided spray port 51 is fixed on the lower pipe 53, and the lower pipe 53 realizes spraying by pumping water from the water tank 3 through the main water pipe 18 and the single-port water pump 5 with the second circulating water pipe 17. The spray water can be sprayed to the upper packing layer 25 and the lower packing layer 26 at the same time, so that the upper packing layer 25 obtains more spray water, and because the bottom of the upper packing layer 25 is also washed by the spray water sprayed from the double-sided spray port 51, the solid impurities at the bottom of the upper packing layer 25 can be washed down, thereby improving the durability of the upper packing layer. In order to ensure that the circulating water in the water tank can reach the upper and lower spray layers through the main circulating water pipe via the double-port water pump, the diameter of the first circulating water pipe is designed to be larger, and the diameter of the second circulating water pipe is designed to be smaller, so that the first circulating water channel located above can obtain a large amount of water under low pressure, effectively ensuring the uniformity of the spraying work. The lower spray layer selects a spray head with double-sided nozzles, which can spray the upper and lower packing layers at the same time, increasing the spraying efficiency.

[0029] The above-mentioned upper spray layer and lower spray layer adopt copper frames and copper tubes. Compared with traditional steel materials, copper products have low activity, oxidation resistance and corrosion resistance, which prolongs the service life of the spray tower. Copper tubes are preferred.

[0030] As an embodiment of the utility model, the activated carbon solid-liquid purification device 2 has an activated carbon replacement port 30, a fourth circulating water pipe 14, a sixth circulating water pipe 13, an air inlet 11, and an air inlet short pipe 12; after the waste flue gas enters the activated carbon solid-liquid purification device 2 through the air inlet 11, it first contacts with the activated carbon soaked in circulating water in the activated carbon filling box 29, absorbs a part of the waste gas and larger solid particles, and then the waste flue gas enters the tower body 1 through the air inlet short port 23; during this process, the activated carbon solid-liquid purification device 2 is continuously soaked with circulating water drawn from the water tank 3 by the fourth circulating water pipe 14 through the double-port water pump 5, and the flowing circulating water flows to the water tank 3 via the sixth circulating water pipe 13; the activated carbon replacement port can replace the activated carbon to avoid the activated carbon from failing due to absorbing too much flue gas, resulting in a decrease in the working efficiency of the spray tower.

[0031] It should be further explained that, since the waste flue gas flowing in from the air inlet 11 is a high-temperature gas, its heat will heat the circulating water in the activated carbon solid-liquid purification device 2, so that the circulating water flowing to the water tank 3 through the sixth circulating water pipe 13 has a higher temperature. This higher temperature circulating water can produce a convection effect in the water tank 3, forming a natural movement in the water tank, thereby achieving uniform mixing of the circulating liquid in the water tank without additional energy consumption.

[0032] As an embodiment of the utility model, a water quality detector is provided in the purification U-shaped tube. There is circulating water in the purification U-shaped tube 21, and the liquid level is limited between the top and bottom of the water quality detector 28. If the liquid level is too high or too low, the water quality detector 28 will sound an alarm, and the water quality detector 28 will control the single-port water pump 4 to pump or drain water through the fifth circulating water pipe 16; the water quality detector can effectively detect the liquid level and circulating water quality in the purification U-shaped tube. In order to avoid the fan from running at excessive power, if the water quality detector detects that the liquid level in the purification U-shaped tube is too high, a warning will be issued, and the single-port water pump will be controlled to work, and the excess circulating water will be discharged into the water tank. In order to avoid poor circulating water quality and affect smoke absorption, when the water quality detector detects that the pH value of the circulating liquid is abnormal or there are too many abnormal impurities, a warning will be issued, and the single-port water pump will be controlled to work, and the water in the water tank will be pumped into the purification U-shaped tube to mix with the original circulating water. After mixing, the circulating water will be properly discharged to keep the liquid level stable and the water quality good.

[0033] As an embodiment of the utility model, the purification U-shaped tube 21 is connected to the short air outlet 23 through a fan 22, and a dehydration and drying layer 27 is provided under the fan 22; the function of the dehydration and drying layer 27 is to absorb the water vapor in the purified gas, which can reduce the consumption of circulating water and prevent the fan 22 from being damaged by water vapor.

[0034] After the waste flue gas enters the activated carbon solid-liquid purification device 2 through the air inlet 11, it will be initially purified. After the initial purification, the waste flue gas at a relatively normal temperature will then enter the tower body 1 through the air inlet short pipe 12. After being sprayed and washed in the tower body 1, the purification of the waste flue gas can be basically completed. However, due to equipment accuracy and other issues, there are still trace amounts of waste flue gas impurities in industrial practice. At this time, the waste flue gas enters the purification U-tube 21 through the exhaust port 20, where the final final purification and inspection process is completed. The exhaust gas here basically does not contain harmful components. Then the gas is discharged from the opening below the waterproof top cover 24 through the fan 22 and the air outlet short port 23.

[0035] Preferably, the circulating water at the bottom of the washing tower can flow into the water tank through the third circulating water pipe 15. If the water quality is poor, other equipment can be connected to the circulating water renewal port 31 for water replacement.

[0036] The utility model has the function of utilizing waste heat. When the high-temperature flue gas enters the activated carbon solid-liquid purification device through the air inlet, it first contacts with the activated carbon and the absorption liquid to achieve preliminary filtration of the flue gas. The high-temperature absorption liquid after filtration flows into the water tank through the circulating water pipe 6, and the high-temperature absorption liquid can form natural movement in the water tank through the convection effect, and can be effectively mixed with the low-temperature circulating water in the water tank, effectively ensuring the uniformity of the low-temperature circulating water in the water tank, avoiding the use of other mixing devices, and realizing waste heat utilization and energy saving.

[0037] The embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower, characterized by: A tower body (1); an activated carbon solid-liquid purification device (2), the activated carbon solid-liquid purification device being connected to the side wall of the tower body through an air inlet short pipe (12); an exhaust port (20), the exhaust port being provided at the top of the tower body; a purification U-shaped pipe (21), one end of the purification U-shaped pipe being connected to the exhaust port; a fan (22), the air inlet of the fan being connected to the other end of the purification U-shaped pipe; a water tank (3), the water tank being connected to the side wall of the tower body through a third circulation pipe (15); a single-outlet water pump (4), the single-outlet water pump being connected to the purification U-shaped pipe through a fifth circulation pipe (16); a double-outlet water pump (5), one outlet of the double-outlet water pump being connected to a main water pipe (18) extending upward, the main water pipe being connected to a first circulation water pipe (19) and a second circulation water pipe (17) located at different heights, the first circulation water pipe and the second circulation water pipe being connected to the side wall of the tower body respectively; and a fourth circulation water pipe (14), the fourth circulation water pipe being connected between the other outlet of the double-outlet water pump and the activated carbon solid-liquid purification device.

2. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 1, characterized in that: The activated carbon solid-liquid purification device is connected to the water tank via a sixth circulating water pipe (13).

3. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 1, characterized in that: The air outlet of the fan is connected to a short air outlet (23).

4. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 3, characterized in that: A rainproof top cover (24) is provided on the top of the short air outlet.

5. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 1, characterized in that: An activated carbon replacement port (30) is provided on the side of the activated carbon solid-liquid purification device.

6. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 1, characterized in that: An upper packing layer (25), a lower packing layer (26), an upper spraying layer (40) and a lower spraying layer (50) are arranged in intervals in the tower body.

7. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 1, characterized in that: A water quality detector (28) and a water removal drying layer (27) are provided in the purification U-shaped tube.

8. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 6, characterized in that: The upper spraying layer comprises an upper fixing frame (42) and a plurality of upper pipes (43) built into the upper fixing frame, wherein the upper pipes are connected to a single-side spraying port (41).

9. A three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower as claimed in claim 6, characterized in that: The lower spray layer comprises a lower fixing frame (52) and a plurality of lower pipes (53) built into the upper fixing frame, and the lower pipes are connected to double-sided spray ports (51).

10. The three-stage waste heat utilization glass fiber reinforced plastic circulation spray tower according to claim 1, characterized in that: The activated carbon solid-liquid purification device has an activated carbon filling box (29) built in.

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