Waste heat recovery device for flue gas treatment
Technical Field
The utility model relates to a flue gas treatment waste heat recovery device, and belongs to the technical field of flue gas treatment.
Background
The kiln can produce a large amount of flue gas in the daily production process of steelworks, ceramic factory, can contain a large amount of heat energy in these flue gas, if these heat energy do not carry out recycle, just cause serious heat energy waste, to the waste heat recovery of flue gas at present, let in the heat exchanger before spray treatment and carry out heat transfer, retrieve the waste heat, but the flue gas distributes unevenly when getting into the heat exchanger, influences the heat transfer effect to do not cool down before getting into the spray column, influence the treatment effect of flue gas easily.
Disclosure of utility model
The utility model provides a flue gas treatment waste heat recovery device, which solves the problems that the flue gas of the traditional device is unevenly distributed when entering a heat exchanger, the heat exchange effect is affected, the flue gas is not cooled before entering a spray tower, and the treatment effect of the flue gas is easily affected.
The utility model relates to a flue gas treatment waste heat recovery device, which comprises a heat exchanger and a cooling treatment spray tower, wherein the top and the bottom of the heat exchanger are respectively provided with a heat exchange liquid outlet pipe and a heat exchange liquid inlet pipe, the top of the cooling treatment spray tower is provided with an air outlet pipe, the bottom of the cooling treatment spray tower is provided with a liquid outlet pipe, a plurality of heat exchange pipes communicated with the heat exchange liquid outlet pipe and the heat exchange liquid inlet pipe are arranged in the heat exchanger, the upper part of the heat exchanger is provided with a smoke outlet pipe communicated with the lower part of the cooling treatment spray tower, the lower part of the heat exchanger is provided with a smoke inlet pipe, the inner side wall of the lower part of the heat exchanger is provided with a wind distribution ring pipe communicated with the smoke inlet pipe, the inner side of the wind distribution ring pipe is provided with a plurality of wind outlets which spray downwards, the upper part of the cooling treatment spray tower is fixedly provided with a liquid collecting baffle which divides the cooling treatment spray tower into an upper part and a lower part, the liquid collecting baffle is in a ladder shape, the cooling treatment spray tower at the lower end of the liquid collecting baffle is connected with a liquid suction pipe, the liquid suction pipe is connected with a buffer tank, the buffer tank is connected with a return pipe, the return pipe is provided with a liquid pump, the upper part of the return pipe extends to the upper part of the cooling treatment spray tower and is fixedly connected with a first sprayer, a first filler layer is arranged below the first sprayer, the higher end of the liquid collecting baffle is fixedly provided with a ventilation pipe, a second sprayer is arranged below the liquid collecting baffle, the second sprayer is connected with a cooling water inlet pipe, the second filler layer is arranged below the second sprayer, a hollow gas distribution plate I connected with a smoke outlet pipe is arranged below the second filler layer, and smoke outlet holes are uniformly formed in the bottom of the first gas distribution plate.
As one preference, the bottom of the air distribution ring pipe is provided with a positioning boss, the lower part of the air distribution ring pipe is provided with a plurality of supporting plates, the supporting plates are provided with positioning grooves matched with the positioning bosses, the inner side walls of the heat exchangers are provided with fixing grooves for the supporting plates to be inserted, and the air spraying orientation position of the air outlet on the air distribution ring pipe can be rapidly positioned.
As a preference, the top of the ventilation pipe is fixedly provided with a hollow air distribution plate II, the top of the air distribution plate II is conical, air outlet holes are uniformly formed in the bottom of the air distribution plate II, air exhausted by the ventilation pipe can be uniformly distributed, and the effect of flue gas spraying treatment is improved.
As a preference, spray thrower one and spray thrower two all include conical spray cylinder, and spray cylinder's bottom is fixed with hemispherical shower head, evenly is equipped with on the shower head and sprays the hole, and spray cylinder internal fixation has a plurality of cloth liquid boards, and the cloth liquid hole diameter on the top cloth liquid board is greater than the cloth liquid hole diameter on the below cloth liquid board, sprays treatment fluid and cooling water and can carry out once distribution through a plurality of cloth liquid boards, then spray the hole blowout on the shower head through, and liquid distribution is more even, and cooling and treatment effect are better.
As a preference, be equipped with the rose box on the smoke tube of intaking, the top of rose box is equipped with and imports and exports, it is equipped with a plurality of filter to import and export along the axial of smoke tube in, the bottom of filter and the bottom inner wall contact of rose box, the top of filter is fixed with the detachable apron of importing and exporting, be equipped with sealed pad between apron and the rose box roof, the front and back lateral wall and the front and back inner wall contact of rose box of filter, can filter the flue gas that gets into in the heat exchanger, filter the viscidity granule in the flue gas, prevent viscidity granule from gluing outside the heat transfer pipe, influence the heat transfer effect, and the extraction filter that can be convenient is cleared up.
The utility model has the following beneficial effects:
The flue gas that gets into the heat exchanger passes through the wind ring canal evenly distributed in the lower part of heat exchanger to the inboard of wind ring canal is equipped with the air outlet of a plurality of downlinks, can increase the time of flue gas in the heat exchanger, increases the heat transfer effect, handles in addition and sprays the setting and the cooling sprays the upper and lower position department that sets up at a spray column, can save installation space, and sprays earlier through the cooling treatment before handling, guarantees flue gas treatment effect.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure at the liquid collecting baffle;
FIG. 3 is an enlarged schematic view of the structure shown at A in FIG. 1;
FIG. 4 is a schematic view of the structure at the filter box;
FIG. 5 is an enlarged schematic view of the structure at B in FIG. 1;
FIG. 6 is an enlarged schematic view of FIG. 1 at C;
In the figure, 1, a cooling treatment spray tower; 2, a spray cylinder, 3, a spray header, 4, a first packing layer, 5, a second gas distribution plate, 6, a liquid collecting baffle, 7, a cooling water inlet pipe, 8, a second packing layer, 9, a first gas distribution plate, 10, a heat exchange pipe, 11, a wind distribution ring pipe, 12, a support plate, 13, a smoke inlet pipe, 14, a filter box, 15, a liquid pump, 16, a buffer tank, 17, a ventilation pipe, 18, a liquid distribution plate, 19, spray holes, 20, a filter plate, 21, a cover plate, 22, a positioning boss, 23, a fixed groove, 24 and a heat exchanger.
Detailed Description
The utility model is further illustrated below with reference to examples.
Embodiment 1, as shown in fig. 1 to 6, the utility model is a flue gas treatment waste heat recovery device, which comprises a heat exchanger 24 and a cooling treatment spray tower 1, wherein the top and the bottom of the heat exchanger 24 are respectively provided with a heat exchange liquid outlet pipe and a heat exchange liquid inlet pipe, the top of the cooling treatment spray tower 1 is provided with an air outlet pipe, the bottom of the cooling treatment spray tower 1 is provided with a liquid outlet pipe, a plurality of heat exchange pipes 10 communicated with the heat exchange liquid outlet pipe and the heat exchange liquid inlet pipe are arranged in the heat exchanger 24, the upper part of the heat exchanger 24 is provided with a smoke outlet pipe communicated with the lower part of the cooling treatment spray tower 1, the lower part of the heat exchanger 24 is provided with a smoke inlet pipe 13, the inner side wall of the lower part of the heat exchanger 24 is provided with a wind distribution ring pipe 11 communicated with the smoke inlet pipe 13, the inner side of the wind distribution ring pipe 11 is provided with a plurality of wind outlets which spray downwards, the upper part of the cooling treatment spray tower 1 is fixedly provided with a liquid collecting baffle 6 for dividing the cooling treatment spray tower 1 into an upper part and a lower part, the liquid collecting baffle 6 is in a ladder shape, the cooling treatment spray tower 1 at the lower end of the liquid collecting baffle 6 is connected with a liquid pumping pipe, the liquid pumping pipe is connected with a buffer tank 16, the buffer tank 16 is connected with a return pipe, the return pipe is provided with a liquid pump 15, the upper part of the return pipe extends to the upper part of the cooling treatment spray tower 1 and is fixedly connected with a sprayer I, a filler layer I4 is arranged below the sprayer, the higher end of the liquid collecting baffle 6 is fixedly provided with a ventilation pipe 17, a sprayer II is arranged below the liquid collecting baffle 6, the sprayer II is connected with a cooling water inlet pipe 7, a filler layer II 8 is arranged below the sprayer II, a hollow gas distribution disc I9 connected with a smoke outlet is uniformly arranged below the filler layer II, and the bottom of the gas distribution disc I9 is uniformly provided with smoke outlet holes.
When the device is used, flue gas enters the air distribution ring pipe 11 through the smoke inlet pipe 13 and is discharged towards the lower part at the air outlet, the flue gas discharged from the air outlet avoids the heat exchange pipe 10 at the outermost layer, then the flue gas moves upwards and contacts with the heat exchange pipe 10 for heat exchange, cold water entering from the heat exchange liquid inlet pipe can be discharged from the heat exchange liquid inlet pipe into the steam generator or the reboiler for treatment after absorbing heat energy, so that the subsequent utilization is facilitated, the flue gas after heat exchange enters the lower part of the cooling treatment spray tower 1 from the smoke outlet pipe, then the flue gas is uniformly distributed from the air distribution disc I9 and then contacts with cooling water flowing down by the spray device II in the packing layer II, the cooling flue gas is cooled, then the flue gas enters the upper part of the cooling treatment spray tower 1 through the ventilation pipe 17 and then contacts with the treating agent sprayed down by the spray device I in the packing layer I4, then the flue gas is discharged from the air outlet pipe, the liquid collecting and the treating agent flowing down is discharged from the liquid collecting baffle 6 and then enters the buffer tank 16 for circulation of the liquid pump 15.
In embodiment 2, on the basis of embodiment 1, a positioning boss 22 is provided at the bottom of the air distribution ring pipe 11, a plurality of support plates 12 are provided at the lower part of the air distribution ring pipe 11, positioning grooves matched with the positioning boss 22 are provided on the support plates 12, and a fixing groove 23 for inserting the support plates 12 is provided on the inner side wall of the heat exchanger 24.
The top of the ventilation pipe 17 is fixed with a hollow air distribution plate II 5, the top of the air distribution plate II 5 is conical, and air outlet holes are uniformly formed in the bottom of the air distribution plate II 5.
The first sprayer and the second sprayer comprise conical spraying barrels 2, hemispherical spraying heads 3 are fixed at the bottoms of the spraying barrels 2, spraying holes 19 are uniformly formed in the spraying heads 3, a plurality of liquid distribution plates 18 are fixed in the spraying barrels 2, and the liquid distribution hole diameter of the upper Fang Buye plate 18 is larger than that of the lower Fang Buye plate 18.
The smoke inlet pipe 13 is provided with a filter box 14, the top of the filter box 14 is provided with an inlet and an outlet, a plurality of filter plates 20 are arranged in the inlet and the outlet along the axial direction of the smoke inlet pipe 13, the bottoms of the filter plates 20 are in contact with the inner wall of the bottom of the filter box 14, a detachable cover plate 21 for closing the inlet and the outlet is fixed at the top of the filter plates 20, a sealing gasket is arranged between the cover plate 21 and the top wall of the filter box 14, and the front side wall and the rear side wall of the filter plates 20 are in contact with the front inner wall and the rear inner wall of the filter box 14. When the filter plate 20 is cleaned, the bolts on the cover plate 21 are unscrewed, then the cover plate 21 is lifted upwards, the filter plate 20 is taken down, cleaning can be performed, after cleaning, the filter plate 20 is inserted back into the inlet and outlet, then the cover plate 21 is pressed down, the bottom of the filter plate 20 is in contact with the inner wall of the bottom of the filter box 14, and then the bolts are screwed down for fixation.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
In the description of the present utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, only for convenience in describing the present utility model, and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.