CN108311280A - A kind of high-efficient wet-type electrostatic precipitator - Google Patents

Abstract

The invention relates to a high-efficiency wet electrostatic precipitator, comprising a casing, a spray mechanism, a gas processing mechanism and a waste heat utilization mechanism; an air inlet pipe communicates with the lower side wall of the casing, and an air outlet pipe communicates with the top of the casing; the gas processing mechanism It includes an insulator, a high-frequency pulse power supply arranged on the top of the casing, and an anode tube and a cathode circular frame that are vertically fixed in the casing and are set concentrically with each other. The cathode circular frame is located in the anode tube, and the cathode circular frame is electrically connected to the high-frequency pulse power supply. , the anode tube is grounded; the insulator is set at the connection between the cathode round frame and the high-frequency pulse power supply; the spray mechanism includes a sedimentation tank connected to the bottom of the shell and the first spray head spraying from the bottom of the anode tube toward the bottom of the shell, the waste heat The utilization mechanism includes a water storage tank, a first heat exchange tube arranged in the air intake pipe, and a second heat exchange pipe arranged in the air outlet pipe.

Description

A high-efficiency wet electrostatic precipitator

technical field

The invention relates to a high-efficiency wet electrostatic precipitator, which belongs to the field of environmental protection equipment.

Background technique

In large-scale industrial production work, some workplaces (such as thermal power plants, etc.) will produce a lot of dust, which needs to be treated by purification and dust removal treatment devices before being discharged into the outside world, otherwise it will cause environmental pollution. There are many types of electrostatic precipitators. According to whether liquid dust removal and dust removal are used in the dust removal process, electrostatic precipitators are divided into dry electrostatic precipitators and wet electrostatic precipitators. Wet electrostatic precipitator is an ultra-low emission project in recent years, especially in coal-fired units, it has been widely used. Wet electrostatic precipitator is an emerging environmental protection equipment. But there are some problems in the existing wet dust collector.

For example, the Chinese patent with the notification number CN204564337U discloses a new type of high-efficiency wet electrostatic precipitator and mist eliminator, including: an upper casing, a middle casing, a lower casing, a cathode wire and an anode tube, and the anode tube is fixed on the middle casing Inside the body, the cathode wire is fixed at the center of the anode tube, and the cathode wire is externally connected to a high-voltage direct current. An insulating box is arranged on the upper casing, and the high-voltage direct current is introduced into the cathode wire through the insulating box. A waste gas inlet is provided, and a gas outlet is provided on the upper shell. The problem is that the waste heat temperature at the exhaust gas inlet cannot be used, and the treated gas is discharged with the gas outlet, and a lot of the flue gas still contains white smoke, which causes visual pollution and needs to be heated to eliminate it, which causes a waste of resources. Moreover, in this patent, the anode tubes are densely arranged in the casing, which wastes area, is not conducive to the circulation of flue gas, and is easy to accumulate dust in each independent anode tube.

Contents of the invention

In order to solve the above technical problems, the present invention provides a high-efficiency wet electrostatic precipitator. The high-efficiency wet electrostatic precipitator can make better use of waste heat resources, have a better flue gas treatment effect, and is energy-saving and environmentally friendly.

Technical scheme of the present invention is as follows:

A high-efficiency wet electrostatic precipitator, including a shell, a spray mechanism, a gas processing mechanism, and a waste heat utilization mechanism; an air inlet pipe communicates with the lower side wall of the shell, and an air outlet pipe communicates with the top of the shell; the gas processing mechanism includes insulators, The high-frequency pulse power supply arranged on the top of the shell, and the anode tube and the cathode circle frame which are vertically fixed in the shell and are set concentrically with each other, the cathode circle frame is located in the anode tube, the cathode circle frame is electrically connected with the high-frequency pulse power supply, and the anode tube grounding; the insulator is arranged at the connection between the cathode circular frame and the high-frequency pulse power supply; the spray mechanism includes a sedimentation tank communicated with the bottom of the shell and at least one first spray head spraying from the bottom of the anode tube toward the bottom of the shell, the first The spray head is connected to an external water source; the waste heat utilization mechanism includes a water storage tank, a first heat exchange tube arranged in the air inlet pipe, and a second heat exchange pipe arranged in the air outlet pipe; the two ends of the first heat exchange pipe are respectively connected with the water storage tank One end of the second heat exchange tube is communicated with the pipeline through a pipeline, the pipeline connecting the first heat exchange tube and the water storage tank is provided with a second water pump, and the other end of the second heat exchange tube is communicated with the water storage tank pipeline.

Wherein, the anode tubes are provided with several, the cathode circular frames are provided with several, the calibers of several anode tubes gradually decrease and are concentrically set, the calibers of several cathode circular frames gradually decrease, and between every two adjacent anode tubes A cathode circle frame is set concentrically on both, and a cathode circle frame is also set outside the outermost anode tube, and the inner wall of the shell is made of the same material as the anode tube.

Wherein, the first heat exchange tube and the second heat exchange tube are serpentine finned tubes.

Wherein, the inside of the housing is located below the anode tube and horizontally fixed with an airflow uniform distribution plate, and the airflow uniform distribution plate is uniformly and densely arranged with air holes, and the airflow uniform distribution plate is located above the first shower head.

Wherein, the spraying mechanism further includes at least one second spraying head, which is connected to an external water source; the second spraying head sprays from above the anode tube toward the anode tube.

Wherein, the spraying mechanism also includes a connecting pipe connecting the first spraying head, the second spraying head and the sedimentation tank, and a first water pump arranged on the connecting pipe; a filter plate placed horizontally is arranged in the sedimentation tank, The filter plate is densely provided with filter holes, and the filter plate divides the inside of the sedimentation tank into an accommodation cavity and a water filter cavity, and the lower end of the connecting pipe is located in the water filter cavity.

Wherein, the anode tube and the upper end surface of the cathode circular frame are fixed by a bracket.

The present invention has following beneficial effects:

1. The present invention can make better use of waste heat resources, have a better flue gas treatment effect, effectively reduce smoke dust, formaldehyde and water mist in the flue gas, comply with national emission standards, and be energy-saving and environmentally friendly.

2. The present invention is equipped with a waste heat utilization mechanism, which can better utilize the heat of flue gas, and is energy-saving and environment-friendly.

3. The present invention is equipped with a gas treatment mechanism, which can effectively treat harmful gases and dust contained in flue gas, and discharge greenly, which is beneficial to environmental protection.

4. The present invention is equipped with a spray mechanism, which can better handle the dust contained in the flue gas. After the sewage in the sedimentation tank is filtered, it can be used continuously as the water supply of the spray assembly, so that the washing spray mechanism can realize the recycling of water , to achieve "zero discharge" of waste water, and the water in the water storage tank can also be recycled, which is more energy-saving and environmentally friendly.

5. The present invention is equipped with an airflow uniform distribution plate, which plays a role in dispersing the flue gas, so that the flue gas can be treated more completely.

Description of drawings

Fig. 1 is the front internal structure schematic diagram of the present invention;

Fig. 2 is the structural representation along A-A of Fig. 1 of the present invention;

Fig. 3 is a top view structural schematic diagram of the deflector of the present invention;

Fig. 4 is the structural representation of cathode round frame of the present invention;

Fig. 5 is the structural representation of anode tube of the present invention;

Fig. 6 is a three-dimensional view of the cooperation of the anode tube and the cathode circular frame inside the housing of the present invention.

The reference signs in the figure represent:

1-housing, 2-spray mechanism, 21-sedimentation tank, 211-filter plate, 212-accommodating chamber, 213-filter chamber, 221-first spray head, 222-second spray head, 23- Connecting pipe, 24-first water pump, 3-gas processing mechanism, 31-insulator, 32-high-frequency pulse power supply, 33-anode tube, 34-cathode round frame, 35-bracket, 4-waste heat utilization mechanism, 41-storage Water tank, 42-the first heat exchange tube, 43-the second heat exchange tube, 44-the second water pump, 5-intake pipe, 6-outlet pipe, 7-airflow uniform distribution plate, 71-air vent.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figures 1-6, a high-efficiency wet electrostatic precipitator includes a housing 1, a spray mechanism 2, a gas processing mechanism 3 and a waste heat utilization mechanism 4; an air inlet pipe 5 communicates with the lower side wall of the housing 1, and an air outlet pipe 6 communicates with the top of the shell 1; the gas treatment mechanism 3 includes an insulator 31, a high-frequency pulse power supply 32 arranged on the top of the shell 1, and an anode tube 33 and a cathode circular frame that are vertically fixed in the shell 1 and nested concentrically with each other 34, the cathode circular frame 34 is located in the anode tube 33, the cathode circular frame 34 is electrically connected to the high-frequency pulse power supply 32, and the anode tube 33 is grounded; the insulator 31 is arranged at the junction of the cathode circular frame 34 and the high-frequency pulse power supply 32; Both the insulator 31 and the anode tube 33 are grounded for protection, and the spray mechanism 2 includes a sedimentation tank 21 communicating with the bottom of the housing 1 and at least one first spray head 221 spraying from below the anode tube 33 toward the bottom of the housing 1 , the first shower head 221 is connected to an external water source; the waste heat utilization mechanism 4 includes a water storage tank 41, a first heat exchange pipe 42 arranged in the air inlet pipe 5, and a second heat exchange pipe 43 arranged in the air outlet pipe 6; the first The two ends of the heat exchange tube 42 are respectively connected with the water storage tank 41 and one end of the second heat exchange tube 43 through a pipeline, and the pipeline connecting the first heat exchange tube 42 and the water storage tank 41 is provided with a second water pump 44, and the second heat exchange tube The other end of 43 is communicated with water tank 41 pipelines. The first heat exchange pipe 42 is cold water in and hot water out, and the second heat exchange pipe 43 is hot water in and cold water out.

Referring to Figures 2-6, there are several anode tubes 33, and several cathode circular frames 34. The diameters of several anode tubes 33 are gradually reduced and concentrically set, and the diameters of several cathode circular frames 34 are gradually reduced. A cathode circle frame 34 is concentrically set between two adjacent anode tubes 33, and a cathode circle frame 34 is also set outside the outermost anode tube 33. The inner wall of the housing 1 is made of the same material as the anode tube 33, so the housing 1 can be used as the outermost anode tube. The arrangement of the anode tube 33 and the cathode circular frame 34 in this way is more conducive to the passage of flue gas, does not waste the area of the anode tube 33 , and is not easy to accumulate dust inside the anode tube 33 .

Referring to FIG. 1 , the first heat exchange tube 42 and the second heat exchange tube 43 are serpentine finned tubes. In order to make the heat exchange effect better.

Referring to Fig. 1 and Fig. 3, the inside of the housing 1 is located below the anode tube 33 and is horizontally fixed with an air flow uniform distribution plate 7, and the air flow uniform distribution plate 7 is evenly and densely provided with air holes 71, and the air flow uniform distribution plate 7 is located at the first nozzle Above the shower head 221.

Referring to FIG. 1 , the spray mechanism 2 further includes at least one second shower head 222 connected to an external water source; the second shower head 222 sprays toward the anode tube 33 from above the anode tube 33 .

Referring to Fig. 1, the spraying mechanism 2 also includes a connecting pipe 23 connecting the first spraying head 221, the second spraying head 222 and the sedimentation tank 21, and a first water pump 24 arranged on the connecting pipe 23; A filter plate 211 placed horizontally is arranged in the pool 21, and filter holes are densely arranged on the filter plate 211. The filter plate 211 divides the sedimentation tank 21 up and down into an accommodation cavity 212 and a water filter cavity 213. The lower end of the connecting pipe 23 is located cavity 213. After being filtered, the water in the sedimentation tank 21 can be recycled to save resources.

Referring to FIG. 2 , the upper end surfaces of the anode tube 33 and the cathode circular frame 34 are fixed by a bracket 35 .

Working principle of the present invention:

Referring to Fig. 1, the flue gas is sent into the housing 1 through the intake pipe 5, cold water is passed into the first heat exchange tube 42, and after heat exchange with the flue gas, it becomes hot water and passes to the second heat exchange tube 43. When the flue gas continues to go inside the housing 1, then the first shower head 222 works to remove dust and cool down the flue gas, and the sewage flows into the sedimentation tank 21; then the flue gas passes through the anode tube 33 and the cathode circular frame 34, and the cathode circle The frame 34 is connected with the high-frequency pulse power supply 32, and the high energy generated by the cathode circular frame 34 causes the fine dust and water mist in the flue gas to coagulate, condenses into large particles of dust and moves to the anode tube 33; the anode tube 33 is used for Dust and mist are collected, the flue gas continues to lead to the outlet pipe 6, and the hot water in the second heat exchange pipe 43 heats up the flue gas that will escape through the outlet pipe 6, and then discharges it. The second heat exchange pipe 43 The water cooled after the heat exchange in the inside flows back in the water storage tank 41 again, to be recycled next time.

The air flow distribution plate 7 plays the role of dispersing the smoke, so that the smoke can be treated more completely.

When the second shower head 221 is working, the dust on the anode tube 33 can be washed away and flow into the sedimentation tank 21 as sewage.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (7)

1. a kind of high-efficient wet-type electrostatic precipitator, it is characterised in that：Including shell（1）, spraying mechanism（2）, gas treatment means （3）With UTILIZATION OF VESIDUAL HEAT IN mechanism（4）；One air inlet pipe（5）With shell（1）Lower sides are connected to, an escape pipe（6）With shell（1）Top Portion is connected to；Gas treatment means（3）Including insulator（31）, be arranged in shell（1）The high frequency pulse power supply at top（32）And It is fixed on shell vertically（1）Anode tube that is interior and being mutually arranged with one heart（33）With cathode round frame（34）, cathode round frame（34）It is located at Anode tube（33）It is interior, cathode round frame（34）With high frequency pulse power supply（32）Electrical connection, anode tube（33）Ground connection；Insulator（31）If It sets in cathode round frame（34）With high frequency pulse power supply（32）Junction；Spraying mechanism（2）Including with shell（1）Bottom connection Sedimentation basin（21）With at least one from anode tube（33）Underneath towards shell（1）First spray head of base injcction（221）, first Spray head（221）It is connected to external water source；UTILIZATION OF VESIDUAL HEAT IN mechanism（4）Including water tank（41）, be set to air inlet pipe（5）Interior first Heat exchanger tube（42）And it is set to escape pipe（6）The second interior heat exchanger tube（43）；First heat exchanger tube（42）Both ends respectively with deposit Water tank（41）With the second heat exchanger tube（43）One end is connected to by pipeline, the first heat exchanger tube（42）And water tank（41）The pipeline of connection On be provided with the second water pump（44）, the second heat exchanger tube（43）The other end and water tank（41）Pipeline is connected to.

2. high-efficient wet-type electrostatic precipitator according to claim 1, it is characterised in that：The anode tube（33）If being provided with Dry, cathode round frame（34）Several are provided with, several anode tubes（33）Bore be gradually reduced and be arranged with one heart, several cathodes Round frame（34）Bore is gradually reduced, every two adjacent anode tubes（33）Between concentric locking collar be equipped with cathode round frame（34）, outmost turns Anode tube（33）Also it is arranged with cathode round frame outside（34）, shell（1）Inner wall and anode tube（33）Material is identical.

3. high-efficient wet-type electrostatic precipitator according to claim 1, it is characterised in that：First heat exchanger tube（42）With Two heat exchanger tubes（43）For wave-fin pipe.

4. high-efficient wet-type electrostatic precipitator according to claim 1, it is characterised in that：The shell（1）It is internally located at sun Pole pipe（33）Lower horizontal is fixed with airflow uniform distribution plate（7）, airflow uniform distribution plate（7）It is above uniformly intensive to be provided with air hole（71）, Airflow uniform distribution plate（7）Positioned at the first spray head（221）Top.

5. high-efficient wet-type electrostatic precipitator according to claim 1, it is characterised in that：The spraying mechanism（2）Further include At least one second spray head（222）, the second spray head（222）It is connected to external water source；Second spray head（222）From anode Pipe（33）Top is towards anode tube（33）Injection.

6. high-efficient wet-type electrostatic precipitator according to claim 5, it is characterised in that：The spraying mechanism（2）Further include It is connected to the first spray head（221）, the second spray head（222）With sedimentation basin（21）Connecting tube（23）And it is set to connecting tube （23）On the first water pump（24）；The sedimentation basin（21）Inside it is provided with horizontal positioned filter plate（211）, filter plate（211） It is above intensive to be provided with filter hole, filter plate（211）By sedimentation basin（21）It is interior to be divided into accommodating chamber up and down（212）With drainage chamber （213）, connecting tube（23）Lower end be located at drainage chamber（213）It is interior.

7. high-efficient wet-type electrostatic precipitator according to claim 1, it is characterised in that：The anode tube（33）Justify with cathode Frame（34）Upper surface passes through a holder（35）It is fixed.