Flexible wet-type electric fog drop trapping device

Abstract

The utility model relates to a flexible wet-type electric fog drop trapping device, and belongs to the technical field of flue gas purification, the flexible wet-type electric fog drop trapping device comprises a tower body, the tower body comprises a bottom gas inlet end and a top gas outlet end, and a flue gas conditioning mechanism is arranged in the tower body; the flue gas conditioning mechanism comprises a membrane type condenser and a cooling mechanism which is arranged on one side of the tower body and is communicated with the membrane type condenser; the contact area of flue gas and the membrane type condenser can be larger through the membrane type condenser, condensation is more uniform, so that the condensation efficiency is better, an external cooling water source is injected into the membrane type condenser through the input pipeline communicated with the outside and the water pump, the membrane type condenser continuously keeps low temperature, and the condensation efficiency is improved. And the condition that the condensation efficiency is reduced due to temperature increase of the membrane condenser after long-time condensation is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas purification, and in particular to a flexible wet electric droplet capture device. Background Art

[0002] PM10 refers to particles in the ambient air with an aerodynamic equivalent diameter of less than or equal to 10μm, also known as inhalable particles. PM2.5 refers to particles in the ambient air with an aerodynamic equivalent diameter of less than or equal to 2.5μm, also known as fine particles. PM10 can be effectively removed by bag filters and electrostatic precipitators, but the removal effect on PM2.5 is minimal. In order to meet ultra-clean emission requirements, a combined dust removal and demisting process is usually required.

[0003] The use of wet electrostatic precipitator is an effective dust removal process, which has a good removal effect on droplets and dust. At present, there are two forms in China, one is metal plate wet electrostatic precipitator, and the other is honeycomb wet electrostatic precipitator. The flue gas flow rate selected by the metal plate wet electrostatic precipitator is generally maintained at about 2.5m / s, and the maximum is not more than 3.5m / s. The wind speed of the honeycomb wet electrostatic precipitator in the dust electric field should not be greater than 3m / s. Usually, in order to pursue a larger residence time, the wet electrostatic precipitator is made very large. The metal plate wet electrostatic precipitator adopts a horizontal type, and the honeycomb wet electrostatic precipitator adopts a vertical type. In particular, the boiler flue gas treatment adopts a wet desulfurization and dust removal process. Due to the early construction layout, the transformation space is limited, and the equipment layout is limited, the wet electrostatic precipitator cannot exert its maximum performance. The compact layout also brings uncertain safety factors, and the cost is also high. Summary of the invention

[0004] The embodiment of the present application provides a flexible wet electric droplet capture device to solve the problem that the existing wet electric droplet capture device in the related art has low condensation efficiency, resulting in reduced efficiency of flue gas droplet formation, thereby causing low flue gas efficiency.

[0005] The present application provides a flexible wet electric droplet capture device, comprising:

[0006] A tower body, the tower body comprising a bottom air inlet end and a top air outlet end, and a smoke conditioning mechanism is arranged in the tower body;

[0007] The flue gas conditioning mechanism comprises a film condenser and a cooling mechanism disposed on one side of the tower body and connected to the film condenser;

[0008] The cooling mechanism comprises an input pipe connected to the inlet of the film condenser and an output pipe connected to the outlet of the film condenser. One end of the input pipe away from the film condenser is connected to an external water source.

[0009] In some embodiments, a water pump for driving the input of external water source is provided on the input pipeline.

[0010] In some embodiments, the tower body is further provided with a droplet condensation mechanism, an anode mechanism and a cathode mechanism arranged in sequence from bottom to top;

[0011] The droplet condensation mechanism is located above the flue gas conditioning mechanism.

[0012] In some embodiments, the droplet condensation mechanism includes a dual-fluid spray gun disposed in the tower body and a solution tank disposed on one side of the tower body and connected to the dual-fluid spray gun;

[0013] A driving pump is arranged between the solution tank and the dual-fluid spray gun.

[0014] In some embodiments, the anode structure includes a tube bundle, and there are a plurality of the tube bundles, and the plurality of the tube bundles form a honeycomb shape.

[0015] In some embodiments, the tube bundle is provided with an inlet and an outlet for cooling;

[0016] The inlet of the tube bundle is in communication with an input pipeline;

[0017] A water outlet pipe is arranged at the outlet of the tube bundle.

[0018] In some embodiments, the cathode mechanism includes a cathode corona wire and a cathode wire fixing frame.

[0019] In some embodiments, an offline flushing mechanism is provided above the cathode mechanism;

[0020] The offline flushing mechanism includes a flushing water tank disposed on the flushing layer and connected to the flushing layer;

[0021] A flushing pump is arranged between the flushing water tank and the flushing layer.

[0022] In some embodiments, a warm air mechanism for heating the cathode mechanism 5 is also provided on both sides of the tower body.

[0023] In some embodiments, the warm air mechanism includes an insulation box disposed in communication with the tower body, a fan connected to the insulation box, and a heater disposed between the insulation box and the fan.

[0024] The beneficial effects of the technical solution provided by this application include:

[0025] After the flue gas carries smaller slurry droplets and water mist formed by evaporation and flows into the tower body, it first contacts the membrane condenser. The membrane condenser can cool and condense the flue gas as it passes through. The flue gas is cooled again, and the saturated flue gas droplets increase again. After energy exchange, the temperature is reduced by 1 to 5°C. The membrane condenser can make the contact area of ​​the flue gas larger, making the condensation more uniform, thereby improving the condensation efficiency. Through the input pipe connected to the outside world, the external cooling water source is injected into the membrane condenser through a water pump, so that the membrane condenser can maintain a low temperature continuously, avoiding the temperature increase of the membrane condenser after a long period of condensation, which leads to a decrease in condensation efficiency.

[0026] And the input pipe and the output pipe can preferably be independent pipes. It can be understood that the water output from the output pipe will not be recirculated from the input pipe. The input pipe, the membrane condenser and the output pipe are one-way channels. Of course, the water output from the output pipe can be cooled and then input again by the input pipe, so as to avoid the increase of the water source temperature causing the condensation efficiency of the membrane condenser to decrease, and also avoid the use of water formed by the condensation of the tower body to cool the condenser in the prior art, resulting in a decrease in cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the main view provided for an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure provided for an embodiment of the present application.

[0030] 1. Tower body; 11. Flue gas conditioning mechanism; 101. Output pipeline; 102. Membrane condenser; 103. Input pipeline; 104. Water pump; 3. Droplet condensation mechanism; 301. Dual-fluid spray gun; 302. Solution tank; 303. Drive pump; 4. Anode mechanism; 41. Tube bundle; 42. Water outlet pipeline; 5. Cathode mechanism; 51. Corona electrode wire; 52. Cathode wire fixing frame; 6. Off-line flushing mechanism; 601. Flushing layer; 602. Flushing water tank; 603. Flushing pump; 8. Warm air mechanism; 801. Insulation box; 802. Fan; 803. Heater. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] The embodiment of the present application provides a flexible wet electric droplet capture device, which can solve the problem that the existing wet electric droplet capture device has low condensation efficiency, resulting in reduced efficiency of flue gas droplet formation, thereby causing low flue gas efficiency.

[0033] See also Figure 1-2 As shown, the embodiment of the present application provides a flexible wet electric droplet capture device, comprising:

[0034] The tower body 1 includes a bottom air inlet end and a top air outlet end, and a flue gas conditioning mechanism 11 is arranged in the tower body 1;

[0035] The flue gas conditioning mechanism 11 includes a film condenser 102 and a cooling mechanism disposed on one side of the tower body 1 and connected to the film condenser 102;

[0036] The cooling mechanism includes an input pipe 103 connected to the inlet of the film condenser 102 and an output pipe 101 connected to the outlet of the film condenser 102. One end of the input pipe 103 away from the film condenser 102 is connected to an external water source.

[0037] In this embodiment, a water pump 104 for driving the input of external water source is provided on the input pipe 103 .

[0038] After the flue gas carries smaller slurry droplets and water mist formed by evaporation and flows into the tower body 1, it first contacts the membrane condenser 102. The membrane condenser 102 can cool and condense the flue gas while passing through it. The flue gas is cooled again, and the saturated flue gas droplets increase again. After energy exchange, the temperature is reduced by 1 to 5°C. The membrane condenser 102 can make the contact area of ​​the flue gas with it larger, and make the condensation more uniform, thereby making the condensation efficiency better. Through the input pipe 103 connected to the outside, the external cooling water source is injected into the membrane condenser 102 through the water pump 104, so that the membrane condenser 102 can continuously maintain a low temperature, thereby avoiding the temperature increase of the membrane condenser 102 after a long period of condensation, which leads to a decrease in condensation efficiency.

[0039] And the input pipe 103 and the output pipe 101 can preferably be independent pipes. It can be understood that the water output from the output pipe 101 will not be recirculated from the input pipe 103. The input pipe 103, the membrane condenser 102 and the output pipe 101 are one-way channels. Of course, the water output from the output pipe 101 can be cooled and then input into the input pipe 103 again, so as to avoid the increase of the water source temperature leading to the reduction of the condensation efficiency of the membrane condenser 102, and also avoid the use of water condensed from the tower body 1 to cool the condenser in the prior art, resulting in a reduction in cooling efficiency.

[0040] In some optional embodiments, see Figure 1-2 As shown, the tower body 1 is further provided with a droplet condensation mechanism 3 , an anode mechanism 4 and a cathode mechanism 5 which are arranged in sequence from bottom to top, and the droplet condensation mechanism 3 is located above the flue gas conditioning mechanism 11 .

[0041] After passing through the membrane condenser 102 , the flue gas will continue to rise, and then pass through the droplet condensation mechanism 3 and the anode mechanism 4 in turn for purification, and then be discharged from the tower body 1 .

[0042] In some optional embodiments, see Figure 1-2 As shown, in the flexible wet electric capture droplet device, the droplet condensation mechanism 3 includes a dual-fluid spray gun 301 arranged in the tower body 1 and a solution tank 302 arranged on one side of the tower body 1 and connected to the dual-fluid spray gun 301. A driving pump 303 is arranged on the pipeline connecting the solution tank 302 and the dual-fluid spray gun 301 to transport the solution from the solution tank 302 to the dual-fluid spray gun 301.

[0043] After the flue gas passes through the membrane condenser 102, the dual-fluid spray gun 301 in the droplet condensation system sprays the flue gas. The surfactant in the solution tank 302 can enhance the surface tension of the water mist and improve the wettability of the surface of the fine particles. The fine particles collide with the surfactant, agglomerate and become larger and enter the anode mechanism 4, making the droplets and fine particles easier to be captured by the anode mechanism 4.

[0044] The solution in the solution tank 302 may preferably be NaOH, and the dual-fluid spray gun 301 may change the spray rate and range to improve the spray efficiency, and may also be adjusted according to the real-time status.

[0045] In some optional embodiments, see Figure 1-2 As shown, in the flexible wet electric droplet capture device, the anode mechanism 4 includes a tube bundle 41, and there are a plurality of tube bundles 41, and the plurality of tube bundles 41 form a honeycomb shape.

[0046] In this embodiment, the tube bundle 41 is provided with an inlet and an outlet for cooling;

[0047] The inlet of the tube bundle 41 is connected to the input pipeline 103;

[0048] A water outlet pipe 42 is provided at the outlet of the tube bundle 41 .

[0049] The electric field formed in the anode mechanism 4 charges the agglomerated fine particles and moves them toward the tube bundle 41. The suspended droplets formed by the fine particles and the liquid mist gather on the dust collecting electrode to form a liquid film and adhere to the surface of the tube bundle 41. Since the outer wall of the tube bundle 41 is 1 to 5°C lower than the flue gas temperature, the liquid film thickens to form droplets. A large number of droplets accumulate at the anode, and the droplets fall into the tower under the action of gravity, thereby achieving the purpose of water saving. At the same time, the removal of the droplets is better, and the clean flue gas is discharged into the atmosphere, thereby achieving the purpose of droplet capture and water saving.

[0050] The tube bundle 41 also has an inlet and an outlet for cooling, and the external cooling water source can be input into the outlet pipe 42 of the tube bundle 41 through the input pipe 103 in the flue gas conditioning mechanism 11. When the membrane condenser 102 is cooled, the tube bundle 41 is also cooled, so that the cooling efficiency of the tube bundle 41 can be continuously maintained and avoided from being reduced.

[0051] The inlet and outlet of the tube bundle 41 are also one-way channels, which prevents the condensation efficiency of the tube bundle 41 from being reduced due to the increase in water source temperature, and also avoids the use of water condensed from the tower body 1 to cool the condenser in the prior art, which leads to reduced cooling efficiency.

[0052] Among them, the tube bundle 41 adopts a double-layer 2205 hexagonal tube bundle, the middle of the double layer is a water-containing layer, and the moist flue gas passes through the hexagon. The tube bundle 41 has high strength, good concentricity, high parallelism, and uniform thickness. The tube bundle 41 is assembled into a honeycomb shape with a compact structure, a large dust collection area, a small footprint, can be made into a module, is simple to install, and easy to control the installation accuracy.

[0053] In some optional embodiments, see Figure 1-2 As shown, in the flexible wet electric droplet capture device, the cathode mechanism 5 includes a cathode corona electrode wire 51 and a cathode wire fixing frame 52;

[0054] Among them, the cathode corona pole wire 51 adopts a new type of high-efficiency barb wire of lead-antimony alloy, which improves the efficiency and corrosion resistance of current and electric field strength, and can meet the use requirements of flexible wet electric capture droplet device. In the flexible wet electric capture droplet device, it still has a good dust removal effect when the flue gas flow rate is high.

[0055] In some optional embodiments, see Figure 1-2 As shown, in the flexible wet electric droplet capture device, an offline flushing mechanism 6 is provided above the cathode mechanism 5;

[0056] The off-line flushing mechanism 6 includes a flushing water tank 602 disposed on the flushing layer 601 and communicated with the flushing layer 601 , and a flushing pump 603 is disposed between the flushing water tank 602 and the flushing layer 601 .

[0057] The offline flushing mechanism 6 is not used under normal working conditions, but is turned on and used when cleaning is needed to avoid blockage and excessive adhesion of impurities, which affect the efficiency of the device. When the offline flushing mechanism 6 is used, the flushing layer 601 is used to flush the tower body 1 from the top to the bottom, so that the cathode mechanism 5, anode mechanism 4, droplet condensation mechanism 3 and flue gas conditioning mechanism 11 below are flushed.

[0058] In some optional embodiments, see Figure 1-2 As shown, in the flexible wet electric droplet capture device, a warm air mechanism 8 for heating the cathode mechanism is also provided on both sides of the tower body 1.

[0059] In this embodiment, the warm air mechanism 8 includes an insulation box 801 arranged in communication with the tower body 1 , a fan 802 connected to the insulation box 801 , and a heater 803 arranged between the insulation box 801 and the fan 802 .

[0060] The warm air mechanism 8 is used to prevent multiple condensation settings from causing the temperature in the tower body 1 to be too low, causing condensation at the connection between the cathode mechanism 5 and the anode mechanism 4, resulting in a short circuit and thus damaging the device.

[0061] Working principle and process of this application:

[0062] After the flue gas carries smaller slurry droplets and water mist formed by evaporation and flows into the tower body 1, it first contacts the membrane condenser 102. The membrane condenser 102 can cool and condense the flue gas while passing through it. The flue gas is cooled again, and the saturated flue gas droplets increase again. After energy exchange, the temperature is reduced by 1 to 5°C. Through the input pipe 103 connected to the outside, the external cooling water source is injected into the membrane condenser 102 through the water pump 104, so that the membrane condenser 102 can continuously maintain a low temperature, thereby avoiding the temperature increase of the membrane condenser 102 after a long period of condensation, which leads to a decrease in condensation efficiency.

[0063] After the flue gas passes through the membrane condenser 102, the dual-fluid spray gun 301 in the droplet condensation system sprays the flue gas. The surfactant in the solution tank 302 can enhance the surface tension of the water mist and improve the wettability of the surface of the fine particles. The fine particles collide with the surfactant, agglomerate and become larger and enter the anode mechanism 4, making the droplets and fine particles easier to be captured by the anode mechanism 4.

[0064] The electric field formed in the anode mechanism 4 charges the agglomerated fine particles and moves them toward the tube bundle 41. The suspended droplets formed by the fine particles and the liquid mist gather on the dust collecting electrode to form a liquid film and adhere to the surface of the tube bundle 41. Since the outer wall of the tube bundle 41 is 1 to 5°C lower than the flue gas temperature, the liquid film thickens to form droplets. A large number of droplets accumulate at the anode, and the droplets fall into the tower under the action of gravity, thereby achieving the purpose of water saving. At the same time, the removal of the droplets is better, and the clean flue gas is discharged into the atmosphere, thereby achieving the purpose of droplet capture and water saving.

[0065] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0066] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0067] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A flexible wet electric droplet capture device, characterized in that: include: A tower body (1), the tower body (1) comprising a bottom air inlet end and a top air outlet end, and a flue gas conditioning mechanism (11) is arranged in the tower body (1); The flue gas conditioning mechanism (11) comprises a film condenser (102) and a cooling mechanism disposed on one side of the tower body (1) and connected to the film condenser (102); The cooling mechanism comprises an input pipe (103) connected to the inlet of the film condenser (102) and an output pipe (101) connected to the outlet of the film condenser (102), and one end of the input pipe (103) away from the film condenser (102) is connected to an external water source; The tower body (1) is also provided with a droplet condensation mechanism (3), an anode mechanism (4) and a cathode mechanism (5) which are arranged in sequence from bottom to top; The droplet condensation mechanism (3) is located above the flue gas conditioning mechanism (11).

2. The flexible wet electric droplet capture device according to claim 1, characterized in that: The input pipe (103) is provided with a water pump (104) for driving the input of external water source.

3. The flexible wet electric droplet capture device according to claim 1, characterized in that: The droplet condensation mechanism (3) comprises a dual-fluid spray gun (301) arranged in the tower body (1) and a solution box (302) arranged on one side of the tower body (1) and connected to the dual-fluid spray gun (301); A driving pump (303) is provided between the solution tank (302) and the dual-fluid spray gun (301).

4. The flexible wet electric droplet capture device according to claim 1, characterized in that: The anode structure (4) comprises a tube bundle (41), wherein there are a plurality of tube bundles (41), and the plurality of tube bundles (41) form a honeycomb shape.

5. The flexible wet electric droplet capture device according to claim 4, characterized in that: The tube bundle (41) is provided with an inlet and an outlet for cooling; The inlet of the tube bundle (41) is in communication with the input pipeline (103); A water outlet pipe (42) is provided at the outlet of the tube bundle (41).

6. The flexible wet electric droplet capture device according to claim 1, characterized in that: The cathode mechanism (5) comprises a cathode corona electrode wire (51) and a cathode wire fixing frame (52).

7. The flexible wet electric droplet capture device according to claim 1, characterized in that: An off-line flushing mechanism (6) is provided above the cathode mechanism (5); The off-line flushing mechanism (6) comprises a flushing water tank (602) arranged on the flushing layer (601) and communicating with the flushing layer (601); A flushing pump (603) is provided between the flushing water tank (602) and the flushing layer (601).

8. The flexible wet electric droplet capture device according to claim 1, characterized in that: Warm air mechanisms (8) for heating the cathode mechanism (9) are also provided on both sides of the tower body (1).

9. The flexible wet electric droplet capture device according to claim 8, characterized in that: The warm air mechanism (8) comprises an insulating box (801) arranged in communication with the tower body (1), a fan (802) in communication with the insulating box (801), and a heater (803) arranged between the insulating box (801) and the fan (802).

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