Cylindrical white elimination device and smoke exhaust system

Abstract

The application discloses a cylindrical white smoke eliminating device, which comprises at least three vertically arranged white smoke eliminating electrodes in the form of plates, each of the white smoke eliminating electrodes or its extension line is arranged through a cylindrical central axis and is arranged at equiangular intervals in the circumferential direction, the white smoke eliminating electrode is grounded and has an opening structure on the side face, and a discharge electrode in the form of a strip is arranged between two adjacent white smoke eliminating electrodes. Wet flue gas in a chimney enters the white smoke eliminating device, the wet flue gas exchanges heat with ambient air, and condensation is formed into fog droplets. The fog droplets are charged due to adsorption of ion charges, and radial movement occurs under the action of electric field force, when the fog droplets move to the surface of the central white smoke eliminating electrode, liquid film is formed, and the liquid film flows back to the chimney under the action of gravity, so that the fog droplets are captured, the chimney is white smoke eliminated, and finally, the water resources discharged from the chimney are recycled in a high-efficiency and low-cost mode. The smoke exhaust system provided by the application can achieve corresponding technical effects, and details are not described herein.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas emission, in particular to a cylindrical white smoke elimination device and a flue gas emission system comprising the same. BACKGROUND

[0002] In the thermal power industry and other industries, the overall level of water resource utilization efficiency is still low, and there is considerable room for saving. Actively taking effective measures to improve the comprehensive utilization rate of water and save water is a necessary condition for the sustainable development of industrial society and the improvement of market competitiveness, and is also related to the sustainable development of the entire economic society.

[0003] At present, many industries often discharge "white smoke" from chimneys. "White smoke" is actually water, and the discharge of "white smoke" is actually a waste of water resources.

[0004] In addition to resource waste, "white smoke" also affects the visibility of surrounding residential areas and traffic roads, and destroys the environment of the city; in addition, it can also cause the humidity of the downwind area to rise, and the feather mist falling to the ground causes the road around the cooling tower to be wet and slippery or icy, which brings great safety hazards to the surrounding traffic, affects the safe production of the factory, and affects the safe operation of the production equipment around the cooling tower.

[0005] How to efficiently and at low cost recover water resources discharged from chimneys is a problem that needs to be continuously studied. SUMMARY

[0006] The purpose of the present application is to provide a cylindrical white smoke elimination device and a flue gas emission system, which can efficiently and at low cost complete white smoke elimination, and thereby realize the recovery of water resources in the chimney.

[0007] To achieve the above-mentioned purpose, the present application provides a cylindrical white smoke elimination device, comprising at least three vertically arranged white smoke elimination electrodes in the form of a plate, each of the white smoke elimination electrodes or its extension line passes through the central axis of the cylinder and is arranged at equal angles in the circumferential direction, the white smoke elimination electrode is grounded and has an opening structure on the side surface; the area between two adjacent white smoke elimination electrodes is provided with a strip-shaped discharge electrode, the discharge electrode is connected to a high-voltage power supply, and the white smoke elimination electrode and the discharge electrode are insulated.

[0008] Preferably, the white smoke elimination electrode comprises four central white smoke elimination electrodes arranged in the central region and distributed in the form of a cross as a whole, and a strip-shaped discharge electrode is arranged in the area between two adjacent central white smoke elimination electrodes.

[0009] Preferably, the white smoke elimination electrode further comprises at least one group of outer peripheral white smoke elimination electrodes arranged around the central region and uniformly distributed in the circumferential direction, and a strip-shaped discharge electrode is arranged in the area between two adjacent outer peripheral white smoke elimination electrodes.

[0010] Preferably, the white elimination electrode further comprises a cylindrical white elimination electrode arranged outside the central white elimination electrode or the outermost white elimination electrode.

[0011] Preferably, the white elimination electrode comprises at least two concentrically arranged cylindrical white elimination electrodes, and a plurality of peripheral white elimination electrodes arranged in the annular region between adjacent two cylindrical white elimination electrodes; the region between adjacent two peripheral white elimination electrodes is provided with a discharge electrode in the form of a strip, and the central position of the innermost cylindrical white elimination electrode is provided with a discharge electrode.

[0012] Preferably, each white elimination electrode is connected by a white elimination electrode frame, and each discharge electrode is connected by a discharge electrode frame.

[0013] Preferably, the white elimination electrode has a structure of a perforated plate, a screen or a metal foam.

[0014] Preferably, the porosity of the central white elimination electrode ranges from 10% to 90%.

[0015] The exhaust system provided by the application comprises a chimney body, a cylindrical white elimination device communicated with the outlet end of the chimney body, and a supporting component supporting the cylindrical white elimination device on the chimney body; the cylindrical white elimination device is any one of the above-mentioned cylindrical white elimination devices.

[0016] The wet flue gas in the chimney enters the cylindrical white elimination device from bottom to top. Since the side of the white elimination system has a permeable structure or an open structure, the wet flue gas entering the white elimination system exchanges heat with the ambient air to form droplets. After the high-voltage power supply is turned on, a high-voltage electrostatic field is formed between the discharge electrode and the central white elimination electrode, and the discharge electrode generates a large amount of ionic charge. The droplets in the white elimination device are charged by adsorbing ionic charge, and generate an electric field force perpendicular to the central white elimination electrode under the action of the high-voltage electrostatic field. The charged droplets move radially under the action of the electric field force, and form a liquid film when they reach the surface of the central white elimination electrode. The liquid film flows back to the chimney under the action of gravity, thereby realizing the capture of the droplets, the elimination of the white smoke, and the recycling of the water resources discharged by the chimney in an efficient and low-cost manner.

[0017] The exhaust system provided by the application comprises a chimney body, a cylindrical white elimination device communicated with the outlet end of the chimney body, and a supporting component supporting the cylindrical white elimination device on the chimney body; the cylindrical white elimination device is any one of the above-mentioned cylindrical white elimination devices. The exhaust system can achieve the corresponding technical effects, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0019] Figure 1 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application;

[0020] Figure 2 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application; Figure 1 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application;

[0021] Figure 3 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application; Figure 1 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application;

[0022] Figure 4 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application; Figure 1 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application;

[0023] Figure 5 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application; Figure 1 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application;

[0024] Figure 6 Structure diagram of the smoke exhaust system according to a specific embodiment of the present application. Figure 1

[0025] The reference signs in the drawings are as follows: Figures 1 to 6 1 - chimney body, 2 - cylindrical smoke elimination device, 3 - support member;

[0026] 2.1 - central smoke elimination electrode, 2.2 - discharge electrode, 2.3 - smoke elimination electrode frame, 2.4 - high-voltage power supply, 2.5 - peripheral smoke elimination electrode, 2.6 - discharge electrode frame, 2.7 - cylindrical smoke elimination electrode.

[0027] Specific embodiments The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0028]

[0029] ​The core of the present application is to provide a cylindrical white smoke eliminating device and a smoke exhaust system, which can efficiently and at low cost eliminate white smoke and further realize recycling of water resources in a chimney.

[0030] Please refer to Figure 1 , Figure 2 ; Figure 1 is a structural schematic view of the smoke exhaust system provided in the embodiment of the present application; Figure 2 is Figure 1 a structural schematic view of the first embodiment of the cylindrical white smoke eliminating device.

[0031] The smoke exhaust system provided by the present application mainly comprises a chimney body 1, a cylindrical white smoke eliminating device 2, and a supporting component 3 supporting the cylindrical white smoke eliminating device 2 on the chimney body 1. The cylindrical white smoke eliminating device 2 is in communication with the outlet end of the chimney body 1, so that the wet flue gas therein passes through and completes the white smoke elimination process. The specific structure of the supporting component 3 is not the key of the present application, please refer to the prior art, which will not be described herein.

[0032] In the first embodiment, the cylindrical white smoke eliminating device 2 provided by the present application comprises at least three white smoke eliminating electrodes in the form of plates, Figure 2 four of which are specifically provided, each of which is vertically arranged, and its own or its extension line passes through the central axis of the cylinder, that is, each white smoke eliminating electrode is arranged along the radial direction. Obviously, each white smoke eliminating electrode is arranged at substantially equal angles in the circumferential direction to maintain uniform electric field.

[0033] The white smoke eliminating electrode can be made of corrosion-resistant metal material and is grounded, and its side wall has an open hole structure, for example, which can be formed by a porous plate, a screen or a metal foam structure, etc. In general, the open hole rate of the open hole structure can be in the range of 10%-90%.

[0034] The area between the two adjacent white smoke eliminating electrodes is provided with a discharge electrode 2.2, the discharge electrode 2.2 is connected to a high-voltage power supply 2.4, and the white smoke eliminating electrode and the discharge electrode 2.2 are insulated. The discharge electrode 2.2 can be made of corrosion-resistant metal material, and its whole is in the form of a line, which is vertically arranged and has a length not greater than the height of the white smoke eliminating electrode.

[0035] Each discharge electrode 2.2 can be supported and electrically connected by a discharge electrode frame 2.6; and each white smoke eliminating electrode can be supported and electrically connected by a white smoke eliminating electrode frame 2.3.

[0036] Figure 2 In the embodiment, the white smoke eliminating electrode specifically comprises four central white smoke eliminating electrodes 2.1, which are distributed in the form of a cross in the central region. Obviously, three central white smoke eliminating electrodes 2.1 can also be arranged in the central region, in which case the central white smoke eliminating electrodes 2.1 form an angle of 120 degrees two by two; or other number of central white smoke eliminating electrodes 2.1 can be arranged, and the angle is correspondingly changed, which will not be described herein.

[0037] Each discharge electrode 2.2 can be connected to a high-voltage power supply 2.3, and insulation is maintained between each white elimination electrode and each discharge electrode 2.2. The high-voltage power supply 2.3 can be a direct current power supply or a pulse power supply with positive or negative polarity, and the high-voltage end is connected to the discharge electrode 2.2, and the low-voltage end is grounded.

[0038] Please refer to Figure 3 , Figure 3 for Figure 1 the structure diagram of the second embodiment of the middle cylindrical white elimination device.

[0039] Compared with the first embodiment, the white elimination electrode can further include at least one set of outer peripheral white elimination electrodes 2.5 arranged around the central region, and each outer peripheral white elimination electrode 2.5 is uniformly distributed in the circumferential direction. Figure 3 A set of outer peripheral white elimination electrodes 2.5 are arranged in the middle.

[0040] Among them, part of the outer peripheral white elimination electrodes 2.5 and the central white elimination electrode 2.1 can be exactly on the same radius, at which time the two can have an integrated structure.

[0041] Obviously, the closer to the outside, the more the number of outer peripheral white elimination electrodes 2.5 in each layer of structure, and correspondingly, the number of discharge electrodes 2.2 between adjacent outer peripheral white elimination electrodes 2.5 is also larger; but overall, the distribution of the outer peripheral white elimination electrodes 2.5 and the discharge electrodes 2.2 is still uniform.

[0042] Please refer to Figure 4 and Figure 5 , Figure 4 for Figure 1 the structure diagram of the third embodiment of the middle cylindrical white elimination device, Figure 5 for Figure 1 the structure diagram of the fourth embodiment of the middle cylindrical white elimination device.

[0043] As an improvement, on the basis of the technical solution shown in Figure 2 , the white elimination electrode can further include a cylindrical white elimination electrode 2.7, which is arranged outside the central white elimination electrode 2.1.

[0044] Alternatively, on the basis of the technical solution shown in Figure 3 , the white elimination electrode can further include a cylindrical white elimination electrode 2.7, which is arranged outside the outermost outer peripheral white elimination electrode 2.5.

[0045] The outermost cylindrical white elimination electrode 2.7 can also serve as the outer shell of the cylindrical white elimination device 2, which is installed on the chimney body 1 through the support member 3.

[0046] Please refer to Figure 6, Figure 6 For Figure 1 Structure diagram of the fifth embodiment of the middle cylindrical white elimination device.

[0047] The white elimination electrode comprises at least two concentrically arranged cylindrical white elimination electrodes 2.7, Figure 6 The technical scheme in the application sets three cylindrical white elimination electrodes 2.7.

[0048] The center position of the innermost cylindrical white elimination electrode 2.7 is provided with a discharge electrode 2.2. Four outer peripheral white elimination electrodes 2.5 are arranged in the annular region between the innermost and the intermediate two cylindrical white elimination electrodes 2.7, and eight outer peripheral white elimination electrodes 2.5 are arranged in the annular region between the intermediate and the outermost two cylindrical white elimination electrodes 2.7. Obviously, according to the number of layers, other numbers of outer peripheral white elimination electrodes 2.5 can be arranged.

[0049] The wet flue gas in the chimney enters the white elimination device from bottom to top, and the wet flue gas entering the white elimination system with a permeable and / or perforated structure on the side exchanges heat with the ambient air to form droplets. After the high-voltage power supply is turned on, a high-voltage electrostatic field is formed between the discharge electrode and the center white elimination electrode, and a large amount of ionic charge is generated by the tip discharge of the discharge electrode. The droplets in the white elimination device are charged by adsorbing ionic charge, and generate an electric field force perpendicular to the center white elimination electrode under the action of the high-voltage electrostatic field. The charged droplets move radially under the action of the electric field force, and form a liquid film when they reach the surface of the center white elimination electrode. The liquid film flows back to the chimney under the action of gravity, thereby realizing the capture of droplets, and further realizing the white elimination of the chimney. Finally, the water resources discharged by the chimney are recycled in an efficient and low-cost manner.

[0050] The application provides a smoke exhaust system, which comprises a chimney body, a cylindrical white elimination device communicated with an outlet end of the chimney body, and a supporting component for supporting the cylindrical white elimination device on the chimney body; and the cylindrical white elimination device is any one of the above-mentioned cylindrical white elimination devices. The smoke exhaust system can realize the corresponding technical effects, and details are not described herein.

[0051] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0052] The cylindrical white smoke eliminating device and the smoke exhaust system provided by the present application are described in detail above. The principles and implementation manners of the present application are described by using specific examples in this paper, and the above description of the examples is only used to help understand the method of the present application and the core idea thereof. It should be pointed out that, for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A cylindrical white elimination device, characterized by, The white elimination electrode comprises at least three vertically arranged plate-shaped white elimination electrodes, each of the white elimination electrodes or its extension line is arranged through the cylindrical central axis and is equiangularly spaced in the circumferential direction, the white elimination electrode is grounded and has a side opening structure; the area between two adjacent white elimination electrodes is provided with a strip-shaped discharge electrode (2.2), the discharge electrode (2.2) is connected with a high-voltage power supply (2.4), and the white elimination electrode and the discharge electrode (2.2) are insulated; the high-voltage power supply (2.4) adopts a direct current power supply mode or a pulse power supply mode with positive polarity or negative polarity, the high-voltage end of the high-voltage power supply (2.4) is connected with the discharge electrode (2.2), and the low-voltage end is grounded; The white elimination electrode comprises four center white elimination electrodes (2.1) arranged in the central area and integrally distributed in a cross shape, and a strip-shaped discharge electrode (2.2) is arranged in the area between two adjacent center white elimination electrodes (2.1); The white elimination electrode further comprises at least one group of outer peripheral white elimination electrodes (2.5) arranged around the central area and uniformly distributed in the circumferential direction, and a strip-shaped discharge electrode (2.2) is arranged in the area between two adjacent outer peripheral white elimination electrodes (2.5); Part of the outer peripheral white elimination electrodes (2.5) are on the same radius as the center white elimination electrodes (2.1), and at this time, the two have an integrated structure.

2. The cylindrical white elimination device according to claim 1, wherein The white elimination electrode further comprises a cylindrical white elimination electrode (2.7) arranged outside the center white elimination electrode (2.1) or the outermost outer peripheral white elimination electrode (2.5).

3. The cylindrical white elimination device of claim 1, wherein, The white elimination electrode comprises at least two concentrically arranged cylindrical white elimination electrodes (2.7) and a plurality of outer peripheral white elimination electrodes (2.5) uniformly arranged in the annular area between two adjacent cylindrical white elimination electrodes (2.7); a strip-shaped discharge electrode (2.2) is arranged in the area between two adjacent outer peripheral white elimination electrodes (2.5), and a discharge electrode (2.2) is arranged at the central position of the innermost cylindrical white elimination electrode (2.7).

4. A cylindrical white elimination device according to any one of claims 1 to 3, characterized in that Each white elimination electrode is connected through a white elimination electrode frame (2.3), and each discharge electrode (2.2) is connected through a discharge electrode frame (2.6).

5. The cylindrical white elimination device of claim 4, wherein, The white elimination electrode has a porous plate, a screen or a metal foam structure.

6. The cylindrical white elimination device of claim 5, wherein, The opening rate of the center white elimination electrode (2.1) ranges from 10% to 90%.

7. A smoke evacuation system characterized by, The chimney body (1), the cylindrical white elimination device communicating with the outlet end of the chimney body (1), and the support component (3) supporting the cylindrical white elimination device on the chimney body (1); the cylindrical white elimination device is the cylindrical white elimination device according to any one of claims 1-6.

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