CN210699396U

CN210699396U - Chimney waste gas de-whitening device

Info

Publication number: CN210699396U
Application number: CN201921202990.1U
Authority: CN
Inventors: 刘海龙; 刘志伟; 沈学峰; 王军锋
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-06-09
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a chimney waste gas whiting device, which comprises a whiting device arranged at the tail end of a chimney; a condensation atomization device, a water collecting tank and an electrostatic atomization spray head unit are sequentially arranged in the de-whitening device from bottom to top, a de-whitening chamber is arranged between the water collecting tank and the electrostatic atomization spray head unit, and the space between the condensation atomization device and the water collecting tank is communicated with the de-whitening chamber through a guide pipe; the condensation atomization device exchanges heat with the waste gas through the cooling liquid, so that the waste gas is atomized after passing through the condensation atomization device, and the atomized waste gas enters the de-whitening chamber through the guide pipe; the electrostatic atomization spray head unit enables atomized waste gas in the de-whitening chamber to be settled through electrostatic atomization; the settled liquid drops are collected by a water collecting tank; the cooling liquid of condensation atomizing device and the liquid that collecting tank collected begin next circulation in reentrant condensation atomizing device and the electrostatic atomization shower nozzle unit after cooling device cooling treatment, the utility model discloses a take off white device has that good white effect and energy consumption of taking off is lower.

Description

Chimney waste gas de-whitening device

Technical Field

The utility model belongs to the technical field of high-voltage static, concretely relates to chimney waste gas takes off white device.

Background

At present, white smoke discharged from a tall chimney can still be seen in most cities in China, and the smoke mainly comes from coal-fired power plants, the chemical industry, steel plants, and the textile and paper industry. Most of the flue gas is saturated wet flue gas discharged after desulfurization treatment, the flue gas contains a large amount of water vapor, and if the flue gas is directly discharged into the atmosphere, the water vapor can be condensed to form wet smoke plume, which not only affects the aesthetic feeling of cities, but also causes great pollution to the environment, so that the white smoke generating places need to be subjected to the whitening treatment.

At present, most of the technologies for performing the whitening treatment on the high humidity exhaust gas are the pretreatment operation on the exhaust gas. From the prior art, the more pretreatment methods are as follows: the water-cooling condensing device and the spraying device are adopted, however, the water-cooling condensing device mostly adopts circulating water to take away heat in waste gas, and then the circulating water is evaporated in the cooling tower, so that a large amount of water resources are consumed; the spraying device mostly adopts pressure type spraying, the dispersion effect is poor, and the whitening efficiency is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the not enough among the prior art, provided a chimney waste gas and taken off white device, will the utility model discloses chimney waste gas takes off white device and installs in the chimney exit, and the saturated wet flue gas discharges in the atmosphere after flowing through the device, can reach fine white effect of taking off.

The utility model discloses the technical scheme who adopts as follows:

a chimney waste gas de-whitening device comprises a de-whitening device, wherein the de-whitening device is cylindrical and is arranged at the tail end of a chimney; a condensation atomization device, a water collecting tank and an electrostatic atomization spray head unit are sequentially arranged in the de-whitening device from bottom to top, the space between the water collecting tank and the electrostatic atomization spray head unit is a de-whitening chamber, and the space between the condensation atomization device and the water collecting tank is communicated with the de-whitening chamber through a guide pipe;

the condensation atomization device exchanges heat with the waste gas through the cooling liquid, so that the waste gas is atomized after passing through the condensation atomization device, and the atomized waste gas enters the de-whitening chamber through the guide pipe;

the electrostatic atomization spray head unit enables atomized waste gas in the de-whitening chamber to be settled through electrostatic atomization; the settled liquid drops are collected by a water collecting tank; and after cooling treatment of the cooling liquid of the condensation atomization device and the liquid collected by the water collecting tank by the cooling device, the cooling liquid enters the condensation atomization device and the electrostatic atomization spray head unit again to start the next circulation.

Furthermore, the condensation atomization device is provided with vent holes which are arranged in an array manner along the vertical direction, cooling pipelines which are arranged in an annular manner are arranged in the condensation atomization device along the horizontal direction, two ends of each cooling pipeline are respectively provided with a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlets and the cooling liquid outlets are respectively connected with the cooling device to form a cooling liquid circulation loop;

further, the electrostatic atomization spray head unit comprises a spray head base, an atomization spray head and an air flow channel are uniformly arranged on the spray head base along the vertical direction, the atomization spray head is provided with an air inlet and a liquid inlet, the air inlet is communicated with the air flow channel in the atomization spray head, the liquid inlet is communicated with the liquid flow channel in the atomization spray head, and the liquid inlet and the air inlet are respectively connected with a cooling device and an air pump; the liquid channel is arranged along the axis of the atomizing nozzle, a needle electrode is arranged in the liquid channel, and the needle electrode is connected with the negative high-voltage electrostatic generator; the gas channel is disposed around the liquid channel.

Furthermore, the cooling device comprises a heat dissipation window, the heat dissipation window is formed by arranging and assembling a plurality of hollow aluminum sheets, one end of the heat dissipation window is respectively connected with a cooling liquid outlet and a water collection tank of the condensation and atomization device through a pipeline, and the other end of the heat dissipation window is respectively connected with the electrostatic atomization nozzle unit and a cooling liquid inlet of the condensation and atomization device; a water pump and a valve are arranged on the communicating pipeline and used for controlling the opening and closing of the pipeline;

further, the water collecting groove is in a slope shape, and the slope angle ranges from 5 degrees to 20 degrees;

furthermore, a fan is arranged at the position opposite to the heat dissipation window and used for accelerating the heat dissipation of the heat dissipation window;

the utility model has the advantages that:

the utility model discloses the theory of operation is simple, and the suitability is strong, and the device bottom at first adopts the condensation atomizing, and later through the static dispersion head spray settlement technique realize that the flue gas takes off whitely. The adopted electrostatic spray head can disperse liquid drops to micron-sized small liquid drops, the contact area between the water drops and condensed and atomized water drops in air can be greatly increased in the spraying and settling process, the condensed and atomized liquid drops are favorably adsorbed and converged and settled, the liquid-gas contact area can be increased to increase the heat transfer efficiency, the dispersed and atomized liquid drops can more quickly absorb residual heat in the air, the gas can achieve the purpose of secondary cooling, and the purpose of removing white smoke is further achieved. The direct-current high-voltage power is adopted to provide voltage for the electrostatic sprayer, and the energy consumption is low. In addition, a condensation circulating device is designed, so that liquid drops in the device can be recycled, the cost is saved, and the working efficiency is improved.

The utility model has the advantages of theory of operation is simple, simple structure, the suitability is strong and investment cost is few to utilize static dispersion technique, makeed the flue gas to take off white in-process effect better, and adopt circulating device, the energy consumption is lower, etc.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partially enlarged schematic view of the electrostatic atomizer unit according to the present invention;

FIG. 3 is a schematic view of the condensing and atomizing apparatus of the present invention;

FIG. 4 is a side view of the structure of the heat dissipation window of the present invention;

FIG. 5 is a front view of the heat dissipation window structure of the present invention;

in the figure, 1, a chimney, 2, a white removing device, 3, a condensation atomizing device, 4, an electrostatic atomizing nozzle unit, 5, a water collecting tank, 6, a heat radiating window, 7, a fan, 8, a water pump, 9, an air pump, 10, a one-way valve, 11, a pressure limiting valve, 12, a water pipe, 13, a negative high-voltage electrostatic generator, 14, a flow guiding pipe, 15, a white removing chamber, 301, a cooling liquid inlet, 302, a cooling liquid outlet, 303, a cooling pipeline, 304, an air vent, 401, a needle electrode, 402, a liquid inlet, 403, an air inlet, 404, an atomizing nozzle, 405, a nozzle base, 406, a nozzle assembling port, 407, an air flow channel, 408, an atomizing nozzle, 409 and a rear end cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model designs a chimney waste gas de-whitening device, as shown in figure 1, a cylindrical de-whitening device 2 is arranged at the end of a chimney 1, and a condensation atomization device 3, a water collection tank 5 and an electrostatic atomization spray head unit 4 are sequentially arranged inside the de-whitening device 2 from bottom to top; the space between the water collecting tank 5 and the electrostatic atomization spray head unit 4 is a whitening chamber 15, and the space between the condensation atomization device 3 and the water collecting tank 5 is communicated with the whitening chamber 15 through a guide pipe 14.

As shown in fig. 3 and 4, the condensation and atomization device 3 is a circular plate disposed on the whitening device 2, and the circular plate is provided with vent holes 304 arranged in an array manner along the vertical direction, the condensation and atomization device 3 is internally provided with a cooling pipe 303 arranged in an annular manner along the horizontal direction, two ends of the cooling pipe 303 are respectively provided with a cooling liquid inlet 301 and a cooling liquid outlet 302, the cooling liquid outlet 302 is sequentially connected with the water pump 8, the check valve 10 and the bottom end of the heat dissipation window 6 through pipes, as shown in fig. 5, the heat dissipation window 6 is formed by arranging and assembling a plurality of hollow aluminum sheets, the liquid to be cooled enters from the lower end of the heat dissipation window 6 and flows from the hollow channel of the heat dissipation window 6 to the upper end of the heat dissipation window 6, the upper end of the heat dissipation window 6 is connected with the cooling liquid inlet 301 through a pipe, so as to form a cooling circulation loop with the cooling liquid inside the condensation and, a fan 7 is installed at a position opposite to the heat radiation window 6. And the high-temperature high-moisture-content waste gas passes through the condensation atomization device 3 under the pushing of the air flow, and after the high-temperature high-moisture-content waste gas and the cooling liquid in the cooling pipeline 303 are subjected to heat exchange and temperature reduction, the high-temperature high-moisture-content waste gas is quickly converted into white smoke (small liquid drops) and enters the white removing chamber 15 through the guide pipe 14.

The electrostatic atomization spray head unit 4 comprises a spray head base 405, spray head assembly holes 406 and air flow channels 407 are uniformly arranged on the spray head base 405 along the vertical direction, an atomization spray head 408 is installed in the spray head assembly holes 406, an atomization nozzle 404 of the atomization spray head 408 is arranged downwards, an air inlet 403 is arranged on the atomization spray head 408, an air inlet 402 is arranged on a rear end cover 409, the air inlet 403 is communicated with the air channel in the atomization spray head 408, the air inlet 402 is communicated with the liquid channel in the atomization spray head 408, the liquid channel is arranged along the axis of the atomization spray head 408, a needle electrode 401 is arranged in the liquid channel, the tail of the needle electrode 401 is fixed on the rear end cover 409 and is connected with a negative high-voltage electrostatic generator 13, and the tip part of; the gas channel is disposed around the liquid channel. The liquid inlet 402 and the air inlet 403 are respectively connected with the heat dissipation window 6 and the air pump 9 through pipelines;

the air pump 9 supplies air into the air channel, the heat radiation window 6 supplies liquid into the liquid channel, the atomizing nozzle 404 is under the combined action of air pressure and an electric field around the needle electrode 401, the liquid flows to the atomizing nozzle 404 and is atomized into small liquid drops to be sprayed in a downward diffusion mode, when the liquid drops sprayed by the atomizing nozzle 404 meet atomized waste gas flowing into the whiting chamber 15 through the guide pipe 14, the atomized waste gas can be settled and finally falls into the bottom of the whiting chamber 15 to the liquid collecting tank 5. And the temperature of the gas is reduced again after the gas is sprayed by the electrostatic atomization nozzle unit 4 (and the temperature is not lower than the ambient temperature outside the whitening device). Then, the gas cooled by the electrostatic atomizing head unit 4 is directly discharged into the atmosphere through the gas flow passage 407.

The water collecting tank 5 is in a slope shape, the slope angle range is 5-20 degrees, liquid drops generated in the whitening chamber 15 can be effectively collected, a through hole is formed in the outer wall of the whitening device 2 at the lower end of the water collecting tank 5, liquid on the water collecting tank 5 is pumped into the heat dissipation window 6 through a pipeline in the through hole by using a water pump, and therefore the liquid collected in the whitening chamber 15 is cooled, and recycling is achieved.

The utility model discloses an utilize chimney waste gas of electrostatic technique to take off white device can realize carrying out effectual processing to the high moisture content waste gas after desulfurization treatment in chimney 1, has avoided the pollution of environment.

The above embodiments are only used for illustrating the design ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all the equivalent changes or modifications made according to the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. The chimney waste gas de-whitening device is characterized by comprising a de-whitening device (2), wherein the de-whitening device (2) is cylindrical and is arranged at the tail end of a chimney (1); a condensation atomization device (3), a water collection tank (5) and an electrostatic atomization spray head unit (4) are sequentially arranged in the de-whitening device (2) from bottom to top, a de-whitening chamber (15) is arranged in a space between the water collection tank (5) and the electrostatic atomization spray head unit (4), and the space between the condensation atomization device (3) and the water collection tank (5) is communicated with the de-whitening chamber (15) through a guide pipe (14);

the condensation atomization device (3) exchanges heat with the waste gas, so that the waste gas is atomized after passing through the condensation atomization device (3), and the atomized waste gas enters the de-whitening chamber (15) through the guide pipe (14);

the electrostatic atomization spray head unit (4) enables atomized waste gas in the de-whitening chamber (15) to be settled through electrostatic atomization; the settled liquid drops are collected by a water collecting tank (5);

and after cooling treatment of the cooling liquid of the condensation atomization device (3) and the liquid collected by the water collection tank (5) by the cooling device, the cooling liquid enters the condensation atomization device (3) and the electrostatic atomization spray head unit (4) again to start the next circulation.

2. The chimney exhaust gas whitening apparatus according to claim 1, wherein the condensation atomization device (3) is provided with vent holes (304) arranged in an array manner along a vertical direction, the condensation atomization device (3) is internally provided with cooling pipes (303) arranged in an annular manner along a horizontal direction, two ends of each cooling pipe (303) are respectively provided with a cooling liquid inlet (301) and a cooling liquid outlet (302), and the cooling liquid inlet (301) and the cooling liquid outlet (302) are respectively connected with a cooling device to form a cooling liquid circulation loop.

3. The chimney exhaust gas whitening device according to claim 1, wherein the electrostatic atomizer unit (4) comprises an atomizer base (405), an atomizer (408) and an air flow passage (407) are uniformly arranged on the atomizer base (405) along a vertical direction, the atomizer (408) is provided with an air inlet (403) and an liquid inlet (402), the air inlet (403) is communicated with the air passage in the atomizer (408), the liquid inlet (402) is communicated with the liquid passage in the atomizer (408), and the liquid inlet (402) and the air inlet (403) are respectively connected with a cooling device and an air pump (9); the liquid channel is arranged along the axis of the atomizing nozzle (408), a needle electrode (401) is arranged in the liquid channel, and the needle electrode (401) is connected with the negative high-voltage electrostatic generator (12); the gas channel is disposed around the liquid channel.

4. The chimney exhaust gas whitening device according to claim 1 or 2, characterized in that the cooling device comprises a heat dissipation window (6), the heat dissipation window (6) is formed by arranging and assembling a plurality of hollow aluminum sheets, one end of the heat dissipation window (6) is respectively connected with the cooling liquid outlet (302) of the condensation and atomization device (3) and the water collection tank (5) through a pipeline, and the other end is respectively connected with the electrostatic atomization nozzle unit (4) and the cooling liquid inlet (301) of the condensation and atomization device (3); and a water pump and a valve are arranged on the communicating pipeline and used for controlling the opening and closing of the pipeline.

5. The chimney exhaust gas whitening apparatus according to claim 4, characterized in that the water collection groove (5) is slope-shaped, and the slope angle is in the range of 5 ° to 20 °.

6. The device for removing the white content of the exhaust gas from the chimney according to claim 4, wherein a fan (7) is installed opposite to the heat dissipation window (6) for accelerating the heat dissipation of the heat dissipation window (6).