CN210544103U

CN210544103U - Pulse plasma smoke and dust purifier

Info

Publication number: CN210544103U
Application number: CN201920918092.XU
Authority: CN
Inventors: 王风斌; 温维汉; 张维军
Original assignee: Shanxi Antai Holding Group Technology Co ltd
Current assignee: Shanxi Antai Holding Group Technology Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-05-19
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses a pulse plasma smoke dust purification device, relating to the technical field of dust removal; the phenomenon of secondary dust emission is solved, and the dust removal efficiency is improved; specifically, an emitting electrode and a dust collecting electrode are arranged in a plasma dust collecting unit, a plurality of electrode needles are uniformly arranged on the emitting electrode and are connected with a negative electrode of a high-voltage pulse power supply through a lead, the dust collecting electrode is a pore plate with a plurality of through holes, the electrode needles correspond to the through holes one by one, and the electrode needles are positioned on an extension line at the center of the through holes; the through hole is a circular hole with a circular arc transition boundary, and the radian of an inlet chamfer is 5-175 degrees; the utility model discloses realized array plasma directional motion space in the dust removal region, the circular arc transition region that the through-hole has produces inward suction to the dust of charge, makes the dust by the suction through-hole and then by the collection, and fundamentally has solved ion wind secondary raise dust problem, and the while large scale has reduced back corona phenomenon, also can effectively get rid of to the particulate matter below 0.3 micron.

Description

Pulse plasma smoke and dust purifier

Technical Field

The utility model relates to a dust removal technical field specifically is a pulse plasma smoke and dust purifier.

Background

The current smoke dust treatment field is mainly based on three technical directions, namely a filter bag method, a water bath method and an electric method.

The filter bag method ensures stable dust removal and needs a large amount of auxiliary equipment facilities, thus causing high investment and operation cost and relatively poor adaptability to smoke components and temperature and humidity; in the current step-by-step treatment process of diversified harmful components in flue gas, the characteristic of humidifying and cooling the flue gas of the water bath method determines that the application link is mostly arranged at the tail end for treatment, and the application range of the water bath method is limited. Meanwhile, the method has certain negative effects on the waste of water resources and the increase of the recycling difficulty of sediments; electric dust removal is taken as the most widely popularized smoke dust treatment technology in the world, the low investment and the low operation cost of the electric dust removal are widely accepted by industrial enterprises all the time, the electric dust removal generally comprises a corona electrode and a dust collecting electrode, the corona electrode ionizes smoke under the action of a high-voltage power supply to generate a large number of free electrons and ions, the free electrons and the ions collide with dust flowing through the corona electrode and the dust collecting electrode and are charged, and the dust ions with negative charges are deposited on the dust collecting electrode under the action of an electric field force. But the electric dust removal also has the following disadvantages:

1. the electric field voltage is not enough to cause that the coulomb force borne by the charged dust is too small, the acceleration perpendicular to the flow field is small, the drop point distance is too long, the increased flight time increases the probability that the charged dust is collided and neutralized by positive ions in the flight process, the gas ionization in the front becomes ineffective ionization, and the pressure in the back-end ionization, charging and attachment processes is increased.

2. The polar plate laying dust structure is unsatisfactory, and the dense region of uncontrollable laying dust forms local arch fast, has increaseed the dirt probability of following electrified dust at this point, and the electric charge gathers fast and can't get into the return circuit, leads to frequent back corona phenomenon, causes the dust to get into the flue gas again and flies.

3. The ionized gas between the pole tip and the pole plate forms intensive distributed ion wind perpendicular to the smoke flow, and a large amount of uncontrollable and non-directional turbulence factors are formed near the pole plate, so that secondary dust raising is caused.

Therefore, how to improve the efficiency of electric dust removal and achieve fine dust removal becomes a bottleneck to be broken through in the field of smoke dust treatment.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art exists not enough, provides a pulse plasma smoke and dust purifier, has solved the phenomenon of secondary raise dust to improve dust collection efficiency.

The utility model discloses a realize through following technical scheme.

A pulse plasma smoke dust purification device comprises a plasma dust collection unit, wherein an emitting electrode and a dust collection electrode are arranged in the plasma dust collection unit, a plurality of pole needles are uniformly arranged on the emitting electrode, the pole needles are connected with a high-voltage pulse superposition power supply through wires, the dust collection electrode is a pore plate with a plurality of through holes, the pole needles correspond to the through holes one by one, and the pole needles are positioned on an extension line at the center of the through holes; the through hole is a circular hole with an arc transition at the boundary, the diameter of the through hole is 20-50mm, the radian of an inlet chamfer of the through hole is 5-175 degrees, and the distance between the top end of the pole needle and the vertical section of the through hole is 3-100 mm.

Further preferably, the diameter of the through hole is 20-50 mm.

Further preferably, the pole needles and the through holes are arranged in an array.

Preferably, a plurality of parallel dust collecting units are arranged in the plasma dust collecting unit, a dust collecting channel is arranged between every two adjacent dust collecting units, a partition plate is arranged between the channels to prevent ion wind from interfering with each other, the dust collecting channel is connected with a dust collecting chamber, and each dust collecting unit comprises a pair of emitting electrodes and a dust collecting electrode.

Further preferably, the inlet end of the plasma dust collecting unit is connected with a gravity dust removing device.

Further preferred, including air intake, gravity dust collector plasma dust removal unit and draught fan, gravity dust collector's entry with the air intake is connected, gravity dust collector's air outlet with the air inlet of plasma dust removal unit is connected, the gas outlet of plasma dust removal unit passes through the pipe connection the draught fan, the draught fan is connected with the motor, the dust collecting chamber of plasma dust removal unit and gravity dust collector's dust collecting chamber are connected with defeated grey device respectively.

Furthermore, the gravity dust removal device is formed by connecting multiple stages of gravity dust removal devices in series.

The utility model discloses produced beneficial effect does for prior art.

1. The utility model discloses array intensive plasma directional motion space has been realized in whole dust removal region, charged granule dust and flue gas form the friction point at the through-hole edge, the air current friction that a plurality of friction points produced forms the negative pressure on the through-hole circular arc transition, and then because the position of utmost point needle and through-hole, make the umbrella-shaped ionic wind of formation on the through-hole surface, make the circular arc transition region that the through-hole has produce inward suction to charged dust, the negative pressure that combines through-hole edge circular arc structure makes the dust sucked the through-hole and then collected, fundamentally has solved electric precipitation secondary raise dust problem, the while large scale has reduced anti-corona phenomenon, also can effectively get rid of below the particulate matter of 0.3 micron.

2. The pulse superposition power supply is adopted to keep the voltage of a working area within a critical range all the time, so that the vertical acceleration of the charged particles is improved to the maximum extent, the flight time of the charged particles is reduced, and the probability of the charged particles being neutralized is reduced. Meanwhile, the combined application of the technology can also realize the self-adaptability to different working condition types of smoke dust.

3. After the device is adopted, the flow velocity of the flue gas can be increased to more than 2m/s according to the needs, and the wind velocity d can reach 2-3 times of the traditional electric and bag dust removal filtering wind velocity, and is even higher.

4. The plasma dust removal device has the advantages that the plasma dust removal device is combined by the special front end dust removal matching device and is connected with the plasma dust removal working area in an equal-diameter mode, the air inlet flow speed of the plasma dust removal working area is greatly reduced, the probability of inelastic collision of the front end area with the highest anion density is increased, direct contact of anions with a polar plate is reduced, electrons are prevented from entering a loop, and charged dust is rapidly increased and rapidly settled.

5. The coulomb force borne by the charged dust is increased by certain controllable electric field voltage, the falling point distance of the charged dust is shortened by increasing the acceleration perpendicular to the flow field, the flying time of the charged dust is reduced, and the probability that the charged dust is collided and neutralized by positive ions in the flying process is reduced, so that the dust removal efficiency is obviously improved.

6. The reasonable pore plate structure avoids the back corona phenomenon formed in the dust accumulation dense area and prevents the secondary dust raising phenomenon.

7. The volume of the device is greatly reduced due to the improvement of the flow velocity of the flue gas, the weight of the device and the occupied area are reduced, and the construction investment cost is further reduced.

Drawings

Fig. 1 is a schematic structural diagram of a pulsed plasma smoke dust purification device according to an embodiment.

Fig. 2 is a schematic structural diagram of a plasma dust collecting unit according to an embodiment.

Fig. 3 is a schematic view of an emitter and a collector electrode mechanism according to an embodiment.

The dust collector comprises an air inlet 1, a step gravity dust collector 2, a pulse plasma dust collector 3, an induced draft fan 4, a motor 5, an emitting electrode 6, a dust collecting electrode 7, a dust collecting channel 8, a flue gas channel 9, an ash conveying pipeline 10, a pipeline 11, a first dust collecting chamber 12, a second dust collecting chamber 13, a plasma dust collecting unit 14, a pole needle 15 and a through hole 16.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

As shown in fig. 1, a pulse plasma smoke and dust purifier, including air intake 1, step gravity dust remover 2, pulse plasma unit 3 and draught fan 4 that gathers dust, step gravity dust remover 2 the entry with air intake 1 is connected, step gravity dust remover 2's air outlet with pulse plasma dust remover 3's air inlet is connected, pulse plasma unit 3's gas outlet is passed through pipeline 11 and is connected draught fan 4, draught fan 4 is connected with motor 5, pulse plasma unit 3's first dust collecting chamber 12 and step gravity dust remover 2's second dust collecting chamber 13 are connected with defeated grey pipeline 10 respectively.

The pulse plasma dust collection unit 3 comprises a plasma dust collection chamber 14, a plurality of parallel dust collection units are arranged in the plasma dust collection chamber 14, a dust collection channel 8 is arranged between every two adjacent dust collection units, and the dust collection channel 8 is connected with a first dust collection chamber 12. The dust collecting unit consists of an emitting electrode 6 and a dust collecting electrode 7 which are opposite in position, a flue gas channel 9 is formed between the emitting electrode 6 and the dust collecting electrode 7, a plurality of pole needles 15 are uniformly arranged on the emitting electrode 6, the pole needles 15 are connected with a negative electrode of a high-voltage pulse power supply through a lead, the dust collecting electrode 7 is a pore plate with a plurality of through holes 16, the pole needles 15 correspond to the through holes 16 one to one, and the pole needles 15 are positioned on an extension line at the center of the through holes 16; the pole pins 15 and the through holes 16 are arranged in an array. The through hole 16 is a circular hole with a circular arc transition boundary, the inlet chamfer radian of the through hole 16 is 5-175 degrees, preferably 60 degrees, the length of the polar needle 15 is 30mm, and the distance from the top end of the polar needle 15 to the through hole 16 is 3-100mm, preferably 60 mm. The diameter of the through-hole 16 is 20-50mm, and the preferred diameter is 30 mm.

The device adopts the combined type step gravity dust removal device to integrally connect the tail-end step with the pulse plasma dust collection working area in the same size, so as to realize better removal of large particles and heavy particles at the front section, reduce the pressure of the rear-section pulse plasma dust collection working area, and increase the charging probability of residual dust and the theoretical value of the charged quantity; meanwhile, the flow direction consistency and the speed uniformity of the smoke flow in the front end region are ensured, the inelastic collision probability and the charged number of particles in the negative ion dense region are greatly improved, and the dust removal efficiency is improved. In the pulse plasma dust removal area, the design of the pole needle and the through hole is adopted, and the arc transition angle of the through hole is controlled, so that charged particles passing through the area around the through hole are sucked into the through hole more fully by the suction force formed by the special through hole structure, and are collected after the dust collection pole 7, and are rapidly settled under the action of gravity, the secondary dust raising phenomenon of the charged particles is prevented, and the dust removal and purification effects are improved.

The specific working process is as follows: the dust enters the stepped gravity dust collector 2 through the air inlet 1, under the action of the stepped gravity dust collector 2, the dust with large particles and heavy particles is removed and enters the second dust collecting chamber 13, the remaining dust with small particles enters the pulse plasma dust collecting unit 3, the high-voltage pulse power supply ionizes the smoke through the pole needle 15 to generate positive and negative charges, the entering dust particles are further electrified, the charged dust particles are quickly sucked into the through hole 16 around the through hole 16 and enter the dust collecting channel 8, and the dust particles are polymerized into large particles to be settled and enter the first dust collecting chamber 12, so that the particles below 0.3 micrometer can be effectively removed.

The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.

Claims

1. A pulse plasma smoke dust purification device comprises a plasma dust removal unit, wherein an array type emitting electrode and a dust collection electrode corresponding to the emitting electrode are arranged in the plasma dust removal unit, and the pulse plasma smoke dust purification device is characterized in that a plurality of pole needles are uniformly arranged on the emitting electrode in an array mode, the pole needles are connected with a negative electrode of a high-voltage pulse superposition power supply through a lead, the dust collection electrode is a pore plate with a plurality of through holes, the pole needles correspond to the through holes one to one, and the pole needles are positioned on an extension line at the center of the through holes; the through hole is a round hole with a circular arc transition boundary, the radian of an inlet chamfer of the through hole is 5-175 degrees, and the distance between the top end of the pole needle and the vertical section of the through hole is 3-100 mm.

2. The pulsed plasma flue dust purification apparatus of claim 1, wherein said through holes have a diameter of 20-50 mm.

3. The pulsed plasma flue dust purification apparatus as claimed in claim 1, wherein said pins and holes are arranged in an array.

4. The pulsed plasma smoke dust purification device according to claim 1, wherein a plurality of parallel dust collecting units are arranged in the plasma dust collecting unit, a dust collecting channel is arranged between two adjacent dust collecting units, a partition plate is arranged between the channels, the dust collecting channel is connected with a dust collecting chamber, and the dust collecting unit comprises a pair of emitting electrodes and a dust collecting electrode.

5. The pulsed plasma flue dust purification apparatus as claimed in claim 1, wherein the inlet end of the plasma dust removal unit is connected with a gravity dust removal device.

6. The pulse plasma smoke dust purification device according to claim 1, comprising an air inlet, a gravity dust removal device, the plasma dust removal unit and an induced draft fan, wherein an inlet of the gravity dust removal device is connected with the air inlet, an air outlet of the gravity dust removal device is connected with an air inlet of the plasma dust removal unit, an air outlet of the plasma dust removal unit is connected with the induced draft fan through a pipeline, the induced draft fan is connected with a motor, and a dust collection chamber of the plasma dust removal unit and a dust collection chamber of the gravity dust removal device are respectively connected with a dust conveying device.

7. The pulsed plasma smoke dust purification device according to claim 5 or 6, wherein the gravity dust removal device is formed by connecting multiple stages of gravity dust removal devices in series.