CN212409430U - Large-scale filler cooling tower device for recovering flue gas waste heat of power plant and eliminating white smoke - Google Patents
Large-scale filler cooling tower device for recovering flue gas waste heat of power plant and eliminating white smoke Download PDFInfo
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- CN212409430U CN212409430U CN202020742373.7U CN202020742373U CN212409430U CN 212409430 U CN212409430 U CN 212409430U CN 202020742373 U CN202020742373 U CN 202020742373U CN 212409430 U CN212409430 U CN 212409430U
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Abstract
A large-scale filler cooling tower device for power plant's flue gas waste heat recovery and white cigarette that disappears relates to power plant's flue gas waste heat recovery technical field. The utility model discloses the device is connected in the flue system before the thermal power plant advances chimney, and its structural feature is, and it includes the tower body, from supreme tower cauldron, two entry flue gas distributors, packing layer, the compound slot type distributor of cooling water, defogging foam ware and exhanst gas outlet of having put respectively down in the tower body. The side wall of the lower part of the tower body is respectively connected with a cooling circulating water outlet, an overflow port and an alkali liquor inlet, and the cooling water heated in the tower kettle is conveyed to the cooling water composite groove distributor after being sequentially cooled by the circulating pump and the heat collecting unit from the cooling circulating water outlet. Compared with the prior art, the utility model discloses "white plume" can be eliminated to the device, has the characteristics that flue gas waste heat recovery efficiency is high, equipment is stable longe-lived.
Description
Technical Field
The utility model belongs to the technical field of the flue gas waste heat recovery technique of power plant and specifically relates to flue gas waste heat recovery of power plant and the large-scale filler cooling tower device of white cigarette that disappears.
Background
The smoke plume treatment is the current environmental protection requirement in China, the reduction of the emission temperature of the smoke in a chimney is one of the approaches, and the heat exchange device widely used for recovering the waste heat of the smoke at present mainly adopts a spray empty tower in direct gas-liquid contact and a heat exchanger in indirect gas-water contact. For the spray empty tower, due to the heat exchange efficiency, the heat exchange effect cannot be realized under the condition of large smoke volume of a large unit; for indirect contact heat exchangers, the conditions of equipment corrosion, large resistance of a flue gas system and short service life of the equipment exist.
At present, the water content in the flue gas discharged by a chimney is higher, the water content in the flue gas can be reduced by a few percent by reducing the temperature of the flue gas, dozens of tons of condensed water are generated, and if the condensed water can be recycled, the method is very significant for water-deficient areas in China. The heat released by the reduction of the temperature of the flue gas is absorbed by cooling water, and then low-grade heat is converted into high-grade heat through technologies such as a heat pump, and double effects can be achieved.
Disclosure of Invention
In order to overcome the defects existing in the prior art, the utility model aims to provide a large-scale filler cooling tower device for recovering the waste heat of the flue gas and eliminating white smoke. It can eliminate white smoke plume and has the features of high waste heat recovering efficiency, stable apparatus and long service life.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a large-scale filler cooling tower device for recovering the waste heat of the flue gas of a power plant and eliminating white smoke is connected in a flue system of the thermal power plant before the flue gas enters a chimney. The tower is structurally characterized by comprising a tower body, wherein a tower kettle, a double-inlet flue gas distributor, a packing layer, a cooling water composite groove type distributor, a demister and a flue gas outlet are respectively arranged in the tower body from bottom to top. The side wall of the lower part of the tower body is respectively connected with a cooling circulating water outlet, an overflow port and an alkali liquor inlet, and the cooling water heated in the tower kettle is conveyed to the cooling water composite groove distributor after being sequentially cooled by the circulating pump and the heat collecting unit from the cooling circulating water outlet.
In the large-scale filler cooling tower device, the heat collecting unit adopts an absorption heat pump system or other heat exchangers.
In the large-scale filler cooling tower device, two flue gas inlets in the double-inlet flue gas distributor are arranged in opposite directions along the tower diameter and are respectively distributed in a double-row blade type.
In the large-scale filler cooling tower device, the filler layer is composed of pore plate corrugated structured fillers, and the flue gas and the circulating cooling water exchange heat in the filler layer.
In the large-scale filler cooling tower device, the specific surface area of the pore plate corrugated regular filler is 200-300 m2/m3The thickness is 0.1-0.2 mm, the meshes are circular, and the aperture is phi 4 mm.
In the large-sized packed cooling tower device, the height of the packing layer is determined according to the following method: after heat exchange is carried out between the flue gas used for waste heat recovery and cooling water, the sum of sensible heat exchange generated in the process that the temperature of the flue gas is reduced from 50-75 ℃ to 30-40 ℃ and latent heat generated by condensed water generated by phase change generated by condensation of water vapor in the flue gas is obtained by combining characteristic data integration of the orifice plate corrugated structured packing.
In the large-scale filler cooling tower device, the height of the filler layer is 2-4m, and the total pressure drop is 200-500 Pa.
The utility model discloses owing to adopted above-mentioned structure, it has following advantage and profitable effect to compare with prior art:
1. the utility model discloses increased the packing layer in current flue gas waste heat recovery's the empty tower that sprays, the flue gas is in with the cooling water the packing layer carries out the direct contact heat transfer, has increased gas-liquid contact time, has improved heat exchange efficiency, and the cooling water circulation volume is showing and is reducing, and the power consumption of circulating pump has reduced about 30%.
2. The utility model discloses use two entry flue gas distributors to jumbo size packed tower, guarantee the flue gas distribution degree of consistency, reduce the pressure drop, reduce the liquid foam and smuggle secretly.
3. The utility model uses the cooling water composite trough distributor for the large-size packed tower, automatically distributes the cooling water, reduces the lift of the circulating pump, and reduces the power consumption of the circulating pump by about 20 percent; and the distribution quality is high, the air resistance is low, and the operation elasticity is high.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a schematic view of a large packed cooling tower apparatus of the present invention;
fig. 2 is the cross-sectional structure view of the tower body of the present invention.
Detailed Description
Referring to fig. 1 and 2, the utility model discloses a large-scale filler cooling tower device for power plant's flue gas waste heat recovery and white smoke elimination, it is connected in the flue system before the thermal power plant advances the chimney. The large-scale filler cooling tower device comprises a tower body 4, wherein a tower kettle 10, a double-inlet flue gas distributor 5, a packing layer 7, a cooling water composite groove type distributor 6, a demister 9 and a flue gas outlet 8 are arranged in the tower body 4 from bottom to top respectively. The side wall of the lower part of the tower body 4 is respectively connected with a cooling circulating water outlet 11, an overflow port 12 and an alkali liquor inlet 13. The cooling water heated in the tower kettle 10 is sequentially cooled by the circulating pump 2 and the heat collecting unit 3 from the cooling circulating water outlet 11 and then is conveyed to the cooling water composite groove type distributor 6. The heat collecting unit 3 adopts an absorption heat pump system or other heat exchangers. The packing layer 7 is composed of a pore plate corrugated regular packing, and the specific surface area of the pore plate corrugated regular packing is 200-300 m2/m3The thickness is 0.1-0.2 mm, the meshes are circular, and the aperture is phi 4 mm. The height of the packing layer 7 is 2-4m, the total pressure drop is 200-500 Pa, and the height in actual use is determined according to the following method: flue gas to be used for waste heat recoveryAfter heat exchange with cooling water, the sum of sensible heat exchange generated in the process that the temperature of the flue gas is reduced from 50-75 ℃ to 30-40 ℃ and latent heat generated by condensed water generated by phase change generated by condensation of water vapor in the flue gas is integrated by combining with characteristic data of the pore plate corrugated structured packing.
The utility model discloses in the device use, the flue gas passes through two entry flue gas distributors 5 from bottom to top through packing layer 7 and cooling water heat transfer back, from the 8 discharges of 4 top exhanst gas outlets of tower body, gets into the chimney and discharges. The cooling water absorbing the heat of the flue gas is pumped out from the tower kettle 10 at the bottom of the tower body 4 through the cooling water circulating pump 2, sent to the heat collecting unit 3 for cooling and then returned to the cooling water composite groove type distributor 6 at the upper part of the tower body 4 to be uniformly distributed on the packing layer 7.
The temperature of the flue gas entering the tower body 4 is 50-80 ℃, the packing layer 7 is composed of pore plate corrugated structured packing, and the flue gas and the circulating cooling water are subjected to direct contact type heat exchange in the packing layer 7 to complete cooling of the flue gas and heating of the circulating water.
Compared with the spray filler cooling tower in the prior art, the device of the utility model has the advantages that the flue gas treatment capacity is large, the tower diameter size is large, and the maximum diameter is 20 m; the double-inlet flue gas distributor 5 is arranged to improve the gas distribution quality, the two flue gas inlets are oppositely arranged along the tower diameter and respectively distributed in a double-row blade type mode, air is tangentially fed, flue gas rushes to the tower wall from two sides and then flows upwards along the annular chamber with the guide blades, and the direction is changed from horizontal to vertical downwards and then upwards.
The utility model discloses the device is compared with spray packing cooling tower among the prior art, has arranged the compound slot type distributor of cooling water 6. Liquid is pre-distributed by a common calandria distributor, and then is distributed to a first-stage groove by a liquid guide pipe on a pre-distribution branch pipe, the first-stage groove is distributed to a second-stage groove group, and the second-stage groove group distributes liquid to the surface of the packing layer 7. The secondary tank group is designed into two sub tanks which are communicated by a communicating pipe so as to ensure that the liquid level is uniform. The main tank and the branch tank are both open, and liquid is distributed according to the set liquid level. The supporting beam of the distribution groove is positioned between the pre-distributor and the secondary groove group, and the primary groove is positioned on the same plane, the structure is simple and compact, the requirement of the large-diameter and low-bed packed tower on the multipoint uniform distribution of the liquid of the cooling water composite groove type distributor 6 is ensured, and the limited space height is effectively utilized. The cooling water is uniformly distributed on the packing layer 7 by means of gravity, so that the sufficient air flow channel area and the operation elasticity are ensured. Compared with the common spraying type liquid distribution, the gravity type liquid distribution reduces the lift of the circulating pump 2 and correspondingly reduces the power consumption by about 20 percent.
Further, contain acidic pollutant such as sulfur dioxide, hydrogen chloride, nitrogen dioxide in the flue gas of thermal power plant, when flue gas and cooling water take place the heat transfer at packing layer 7, the cooling water presents acidity because of having absorbed acidic gas such as sulfur dioxide, hydrogen chloride, nitrogen dioxide of flue gas, for reducing the corruption of acidity to cooling water circulation system, needs add alkaline medicament in tower cauldron 10, for this reason the utility model discloses set up alkali lye entry 13, adjusted the injection volume of alkali lye according to the pH valve of cooling water in tower cauldron 10.
The foregoing description of the embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the form disclosed. It should be noted that other modifications and adaptations made by those skilled in the art without departing from the principles of the present invention should also be considered within the scope of the present invention.
Claims (6)
1. A large-scale filler cooling tower device for power plant's flue gas waste heat recovery and white smoke elimination, it is connected in the flue system before the thermal power plant advances the chimney, its characterized in that, it includes tower body (4), from supreme tower cauldron (10), two entry flue gas distributors (5), packing layer (7), cooling water composite trough distributor (6), demister (9) and exhanst gas outlet (8) of having put respectively down in tower body (4), be connected with cooling circulation water export (11), overflow mouth (12) and alkali lye entry (13) on the lateral wall of tower body (4) lower part respectively, cooling water after tower cauldron (10) internal heating carries to cooling water composite trough distributor (6) after circulating pump (2) and heat acquisition unit (3) cooling down in proper order from cooling circulation water export (11).
2. The large-scale filler cooling tower device for recovering the residual heat of flue gas of a power plant and eliminating white smoke according to claim 1, wherein the heat collecting unit (3) adopts an absorption heat pump system.
3. The large-scale packing cooling tower device for recovering the waste heat of the flue gas of the power plant and eliminating the white smoke according to claim 1 or 2, wherein two flue gas inlets in the double-inlet flue gas distributor are oppositely arranged along the tower diameter and are respectively distributed in a double-row blade type.
4. The large-scale packing cooling tower device for recovering the waste heat of the flue gas of the power plant and eliminating the white smoke according to claim 3, wherein the packing layer (7) is composed of pore plate corrugated structured packing, and the flue gas and the circulating cooling water exchange heat in the packing layer (7).
5. The large-scale packing cooling tower device for recovering waste heat of flue gas of power plant and eliminating white smoke according to claim 4, wherein the specific surface area of the pore plate corrugated structured packing is 200-300 m2/m3The thickness is 0.1-0.2 mm, the meshes are circular, and the aperture is phi 4 mm.
6. The large-scale filler cooling tower device for the recovery of the waste heat of the flue gas of the power plant and the elimination of white smoke according to claim 5, wherein the height of the filler layer is 2-4m, and the total pressure drop is 200-500 Pa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020742373.7U CN212409430U (en) | 2020-05-08 | 2020-05-08 | Large-scale filler cooling tower device for recovering flue gas waste heat of power plant and eliminating white smoke |
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| CN202020742373.7U CN212409430U (en) | 2020-05-08 | 2020-05-08 | Large-scale filler cooling tower device for recovering flue gas waste heat of power plant and eliminating white smoke |
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| CN212409430U true CN212409430U (en) | 2021-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113624029A (en) * | 2020-05-08 | 2021-11-09 | 同方环境股份有限公司 | Large-scale filler cooling tower system for recovering flue gas waste heat of power plant and eliminating white smoke |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113624029A (en) * | 2020-05-08 | 2021-11-09 | 同方环境股份有限公司 | Large-scale filler cooling tower system for recovering flue gas waste heat of power plant and eliminating white smoke |
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