CN113426431B - Low-voltage arc striking regeneration device and method for activated carbon - Google Patents
Low-voltage arc striking regeneration device and method for activated carbon Download PDFInfo
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- CN113426431B CN113426431B CN202110707171.8A CN202110707171A CN113426431B CN 113426431 B CN113426431 B CN 113426431B CN 202110707171 A CN202110707171 A CN 202110707171A CN 113426431 B CN113426431 B CN 113426431B
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Abstract
The invention discloses an activated carbon low-voltage arc striking regeneration device and a regeneration method. The side, opposite to the first regeneration cabin and the second regeneration cabin, of the first regeneration cabin is arranged in an open mode, and metal screens are fixed on the open side parts of the first regeneration cabin and the second regeneration cabin; electrode plates are fixed on the other sides of the first regeneration chamber and the second regeneration chamber, which are opposite to the metal screens respectively; temperature sensors are arranged in the first regeneration chamber and the second regeneration chamber; the first regeneration cabin and the second regeneration cabin are respectively connected with the first mechanical vibrator and the second mechanical vibrator; the first mechanical vibrator and the second mechanical vibrator are respectively fixed on the first base and the second base; the first base is driven by a horizontal driving piece; the top surfaces of the first base and the second base are equal in height. The invention uses the conductive heat production of the active carbon and the arc-striking heat production to activate and regenerate the active carbon at high temperature; meanwhile, electric arc forms an electric hammer effect under low voltage, and the electric hammer has a hole expanding effect on micropores inside the activated carbon, so that the regeneration effect of the activated carbon is further improved.
Description
Technical Field
The invention belongs to the field of activated carbon regeneration, and particularly relates to a low-voltage arc striking regeneration device and method for activated carbon.
Background
The active carbon has good adsorption effect and is widely used for purifying and treating various pollutants. In the adsorption process of the activated carbon, the adsorption substance can be adhered to the surface of the activated carbon and blocked in the pores of the activated carbon, so that the adsorption capacity of the activated carbon is greatly reduced and even lost. The used activated carbon with weakened adsorption capacity is called saturated activated carbon, and the saturated activated carbon can be activated and regenerated, namely, the adsorption capacity of the activated carbon is restored again by decomposing and desorbing the adsorbed substances, so that the cyclic utilization of the activated carbon is realized, and the resources are greatly saved.
The regeneration method of the active carbon at present has various methods, such as: thermal regeneration, wet oxidation regeneration, chemical solvent regeneration, biological regeneration, electrochemical regeneration, electrothermal regeneration, and the like. The regeneration mode of the activated carbon really used in a large amount by industry at the present stage is thermal regeneration, namely saturated activated carbon particles are heated to more than 800 ℃ in an external heat transfer mode, adsorbed organic matters are respectively eliminated from a matrix of the activated carbon in the forms of analysis, carbonization and oxidation according to different properties, and thus the activated carbon is regenerated. The regeneration mode has good effect on the regeneration of most kinds of activated carbon and has better universality. It also has significant disadvantages: because certain regeneration time and air tightness need to be ensured, the regeneration equipment is huge, more auxiliary equipment is needed, the equipment investment is large, the regeneration time is long, the energy consumption is high, the heat dissipation loss is also large, and the carbon loss is also large.
Since activated carbon has a conductive ability, an electrothermal regeneration method is proposed in which joule heat generated by passing current through activated carbon causes spontaneous temperature rise of activated carbon, and rapid temperature rise of activated carbon particles from inside to outside is performed, which is different from temperature rise by heat transfer from outside to inside in a thermal regeneration mode. The principle of the method is simple, but some technical barriers exist, and the method is not widely applied in industry. Since the saturated activated carbon adsorbs a large amount of various contaminants and impurities, adheres to the surface thereof and is clogged in the pores thereof, so that the electric resistance thereof is increased several tens of hundreds times, and even a part of the activated carbon particles cannot be in contact with each other to be insulated. Therefore, the saturated activated carbon is not easy to be electrified under low pressure and generate enough heat for activation, and if the saturated activated carbon is directly electrified under high pressure, the saturated activated carbon is easy to be punctured, the tissue structure of the activated carbon is damaged, and even the saturated activated carbon is directly burnt. Therefore, some pretreatment methods and technologies for regenerating saturated activated carbon are proposed or used, but the increase of the pretreatment stage increases the corresponding equipment and energy consumption, which runs against the development of the saturated activated carbon regeneration technology towards light weight, lower energy consumption and higher speed of the equipment.
Disclosure of Invention
The invention aims to provide an activated carbon low-voltage arc striking regeneration device and a regeneration method aiming at the defects of the prior art, wherein activated carbon is regenerated by combining the conductive heat production and the arc striking heat production of the activated carbon, and the activated carbon is reamed by utilizing the electric hammer effect.
The invention relates to an activated carbon low-voltage arc striking regeneration device which comprises a first regeneration cabin, a second regeneration cabin, a metal screen, an electrode plate, a first mechanical vibrator and a second mechanical vibrator, wherein the first regeneration cabin is arranged on the first regeneration cabin; the side, opposite to the first regeneration cabin and the second regeneration cabin, of the first regeneration cabin is open, and metal screens are fixed at the open side parts of the first regeneration cabin and the second regeneration cabin; an electrode plate is fixed on the other sides of the first regeneration chamber and the second regeneration chamber, which are opposite to the metal screens respectively; the electrode plates in the first regeneration cabin and the second regeneration cabin are respectively connected with the positive pole and the negative pole of a power supply; temperature sensors are arranged in the first regeneration chamber and the second regeneration chamber; the first regeneration cabin and the second regeneration cabin are respectively connected with the first mechanical vibrator and the second mechanical vibrator; the first mechanical vibrator and the second mechanical vibrator are respectively fixed on the first base and the second base; the first base is driven by a horizontal driving piece; the top surfaces of the first base and the second base are equal in height.
Preferably, the metal screen is woven by metal wires, and the protrusions formed by surface interweaving present a rugged texture.
More preferably, the protrusions of the surface of the metal screen are pyramid-shaped.
Preferably, the horizontal driving member adopts an electric cylinder or an electric sliding table.
Preferably, a first sliding guide column is fixed on the first base, and a second sliding guide column is fixed on the second base; the first sliding guide column and the guide block fixed on the outer side wall of the first regeneration cabin form a sliding pair, and the second sliding guide column and the guide block fixed on the outer side wall of the second regeneration cabin form a sliding pair.
The method for regenerating the active carbon by the active carbon low-pressure arc striking regenerating device comprises the following specific processes:
placing a horizontal driving piece, a first base and a second base on a flat ground; filling saturated activated carbon particles into the first regeneration cabin and the second regeneration cabin through the feed inlet; the horizontal driving piece drives the first base, and the distance between the first base and the second base is adjusted, so that the metal screen on the first regeneration cabin is in contact with the metal screen on the second regeneration cabin; then, the vibration frequency and the vibration amplitude of the first mechanical vibrator and the second mechanical vibrator are set, the vibration amplitudes are larger than the distance between two adjacent protrusions on the metal screen mesh, the first mechanical vibrator and the second mechanical vibrator are started to drive the first regeneration cabin and the second regeneration cabin to vibrate up and down, so that the saturated activated carbon particles in the first regeneration cabin and the second regeneration cabin roll, and adsorbates on the surfaces of the saturated activated carbon particles are scraped mutually.
Step two, inputting direct current to electrode plates of the first regeneration cabin and the second regeneration cabin, wherein the voltage of the direct current accords with a voltage formula
Wherein I is a current value, rho is the resistivity of the activated carbon, d is the distance from the electrode plate to the metal screen, S is the contact area of the electrode plate and the activated carbon particles, and l is the height of the protrusion on the metal screen; alpha and beta are constants;
and step three, the active carbon particles roll due to vibration to enable the active carbon particles to be contacted and conducted randomly, the active carbon generates heat spontaneously due to electrification, and the active carbon generates heat uniformly due to rolling and random contact. And under the drive of the first mechanical vibrator and the second mechanical vibrator, the first regeneration chamber and the second regeneration chamber vibrate up and down, and the bulges of the metal screens on the first regeneration chamber and the second regeneration chamber are continuously contacted and separated along with the vibration to generate electric arcs to release heat. The temperature of the activated carbon rises under the combined action of electric conduction and arc initiation, various impurities adsorbed by the activated carbon are desorbed, electrolyzed and pyrolyzed under the action of electrification and high temperature, and the activity of the activated carbon is recovered. Meanwhile, the electric arc forms an electric hammer effect, has a hole expanding effect on micropores inside the activated carbon, and improves the adsorption capacity of the regenerated activated carbon. Harmful exhaust gases released during electrolysis and pyrolysis are further decomposed by the electric arc as they escape through the pores of the metal mesh.
And step four, when the temperature sensor detects that the temperature rises to the preset temperature, the regeneration of the activated carbon is completed, the direct current input of the electrode plate is stopped, the vibration of the first mechanical vibrator and the second mechanical vibrator is stopped, and the regenerated activated carbon particles in the first regeneration cabin and the second regeneration cabin are taken out through the discharge hole.
Preferably, the vibration frequency of the first mechanical vibrator and the vibration frequency of the second mechanical vibrator are within the range of 10Hz to 100Hz, and the vibration frequencies of the first mechanical vibrator and the second mechanical vibrator are different, so that the first regeneration chamber and the second regeneration chamber are ensured not to be relatively static.
Preferably, the value of alpha is 10V-50V, and the value of beta is 10000 A.V/m-20000 A.V/m.
Preferably, in the second step, the resistivity of the activated carbon changes due to temperature change, the controller calculates the real-time resistivity of the activated carbon according to the temperature measured by the temperature sensor, and feeds back and adjusts the voltage of the power supply, so that the voltage of the power supply always conforms to a voltage formula.
The method for regenerating the active carbon by the active carbon low-pressure arc striking regenerating device has the following specific scheme:
placing a horizontal driving piece, a first base and a second base on a flat ground; filling saturated activated carbon particles into the first regeneration cabin and the second regeneration cabin through the feed inlet; the horizontal driving piece drives the first base, and the distance between the first base and the second base is adjusted, so that the minimum distance delta between the metal screens of the first regeneration chamber and the second regeneration chamber is less than 0.0005 m; then, the vibration frequency and the vibration amplitude of the first mechanical vibrator and the second mechanical vibrator are set, the vibration amplitudes are larger than the distance between two adjacent protrusions on the metal screen mesh, the first mechanical vibrator and the second mechanical vibrator are started to drive the first regeneration cabin and the second regeneration cabin to vibrate up and down, so that the saturated activated carbon particles in the first regeneration cabin and the second regeneration cabin roll, and adsorbates on the surfaces of the saturated activated carbon particles are scraped mutually.
Step two, inputting direct current to electrode plates of the first regeneration cabin and the second regeneration cabin, wherein the voltage of the direct current accords with a voltage formula
p is the pressure intensity of the gap between the two metal screens, and the value is 1.013 multiplied by 10 of the atmospheric pressure5Pa and delta are a first regeneration chamber and a second regeneration chamberGamma is the surface ionization coefficient, A and B are empirical coefficients, A is at 10Pa-1m-1～30Pa-1m-1The value is in the range, and B is in the range of 50V/(Pa.m) -200V/(Pa.m);
and step three, the active carbon particles roll due to vibration to enable the active carbon particles to be contacted and conducted randomly, the active carbon generates heat spontaneously due to electrification, and the active carbon generates heat uniformly due to rolling and random contact. And under the drive of the first mechanical vibrator and the second mechanical vibrator, the first regeneration chamber and the second regeneration chamber vibrate up and down, and the adjacent bulges of the metal screens on the first regeneration chamber and the second regeneration chamber gradually approach and separate but do not contact with each other, so that breakdown electric arcs are generated to release heat. The temperature of the activated carbon rises under the combined action of electric conduction and electric arc breakdown, various impurities adsorbed by the activated carbon are desorbed, electrolyzed and pyrolyzed under the action of electrification and high temperature, and the activity of the activated carbon is recovered. Meanwhile, electric arcs are punctured to form an electric hammer effect, the inner micropores of the activated carbon are expanded, and the adsorption capacity of the regenerated activated carbon is improved. Harmful exhaust gases released during electrolysis and pyrolysis are further decomposed by the breakdown arc as they escape through the pores of the metal mesh.
And step four, when the temperature sensor detects that the temperature rises to the preset temperature, the regeneration of the activated carbon is completed, the direct current input of the electrode plate is stopped, the vibration of the first mechanical vibrator and the second mechanical vibrator is stopped, and the regenerated activated carbon particles in the first regeneration cabin and the second regeneration cabin are taken out through the discharge hole.
The invention has the beneficial effects that:
1. the invention realizes the electric heating type regeneration of the activated carbon, and the activated carbon is activated and regenerated at high temperature by utilizing the conductive heat production of the activated carbon and the heat production of the arc striking, so that the activated carbon is regenerated and recycled; meanwhile, the electric arc forms an electric hammer effect, has a hole expanding effect on micropores inside the activated carbon, and further improves the regeneration effect of the activated carbon; the arc striking regeneration mode can be realized under low voltage, and the active carbon is prevented from being burnt by high voltage electricity during power-on regeneration.
2. The invention makes the activated carbon regeneration cabin vibrate, so that the activated carbon particles in the cabin roll, adsorbates on the surfaces of the activated carbon particles can be scraped, the conductivity of the activated carbon is improved, and the electric heating type regeneration is facilitated. In addition, the active carbon particles are contacted randomly and are conducted to generate heat by rolling, so that the active carbon is uniformly regenerated.
3. The metal screen generates electric arcs, the pores of the metal screen are beneficial to the release of gas of the activated carbon in the high-temperature regeneration process, and meanwhile, the electric arcs in the metal screen can break down the released gas, so that the harmful waste gas is further decomposed.
4. The low-voltage activated carbon arc striking regenerating device has the advantages of simple structure, small volume, small occupied area, low power consumption, high speed, low carbon consumption, high adsorption recovery rate and the like.
Drawings
FIG. 1 is a schematic structural diagram of an activated carbon low-pressure arc ignition regenerating device of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, an activated carbon low-voltage arc striking regeneration device comprises a first regeneration chamber 1, a second regeneration chamber 2, a metal screen 3, an electrode plate 4, a first mechanical vibrator 5 and a second mechanical vibrator 6; one sides of the first regeneration cabin 1 and the second regeneration cabin 2, which are opposite to each other, are opened, and metal screens 3 are fixed at the opened side parts of the first regeneration cabin 1 and the second regeneration cabin 2; one electrode plate 4 is fixed on the other side of each of the first regeneration cabin 1 and the second regeneration cabin 2 opposite to the metal screen 3; the electrode plates 4 in the first regeneration cabin 1 and the second regeneration cabin 2 are respectively connected with the positive pole and the negative pole of a power supply; temperature sensors 7 (preferably thermocouple sensors) are arranged in the first regeneration cabin 1 and the second regeneration cabin 2 respectively and used for measuring the temperature of the activated carbon particles in the cabins; the first regeneration cabin 1 and the second regeneration cabin 2 are respectively connected with a first mechanical vibrator 5 and a second mechanical vibrator 6; the first mechanical vibrator 5 and the second mechanical vibrator 6 are respectively fixed on a first base 8 and a second base 9; the first base 8 is driven by a horizontal driving piece, and the distance between the first base and the second base is adjusted, so that the distance between the metal screen 3 on the first regeneration cabin and the metal screen 3 on the second regeneration cabin is changed; the top surfaces of the first base and the second base are equal in height.
Example 2:
in example 1, the metal mesh 3 is woven from metal wires having good conductivity, and the protrusions formed by surface interlacing have a wavy texture.
Example 3:
on the basis of example 2, the protrusions on the surface of the metal screen 3 are pyramid-shaped.
Example 4:
on the basis of the embodiment 1, an electric cylinder or an electric sliding table is adopted as the horizontal driving element.
Example 5:
in addition to embodiment 1, a first sliding guide column 10 is fixed on the first base 8, and a second sliding guide column 11 is fixed on the second base 9; the first sliding guide column 10 and a guide block fixed on the outer side wall of the first regeneration chamber 1 form a sliding pair, the second sliding guide column 11 and a guide block fixed on the outer side wall of the second regeneration chamber 2 form a sliding pair, and the first regeneration chamber 1 and the second regeneration chamber 2 can only move up and down under the constraint action of the first sliding guide column 10 and the second sliding guide column 11.
Example 6:
on the basis of the embodiments 1, 2, 3, 4 or 5, the method for regenerating the activated carbon by the activated carbon low-pressure arc striking regenerating device comprises the following specific processes:
placing a horizontal driving piece, a first base 8 and a second base 9 on a flat ground; the first regeneration chamber 1 and the second regeneration chamber 2 are filled with saturated activated carbon particles through a feed port (not shown in the figure); the horizontal driving piece drives the first base 8, and the distance between the first base and the second base is adjusted, so that the metal screen 3 on the first regeneration cabin is in contact with the metal screen 3 on the second regeneration cabin; then, the vibration frequencies of the first mechanical vibrator 5 and the second mechanical vibrator 6 are respectively set to be 20Hz and 35Hz, the amplitudes of the vibration frequencies are larger than the distance between two adjacent protrusions on the metal screen 3, the first mechanical vibrator 5 and the second mechanical vibrator 6 are started to drive the first regeneration cabin 1 and the second regeneration cabin 2 to vibrate up and down, so that the saturated activated carbon particles in the first regeneration cabin 1 and the second regeneration cabin 2 roll, adsorbates on the surfaces of the saturated activated carbon particles are mutually scraped, and the conductivity of the activated carbon is improved.
Step two, inputting direct current to the electrode plates 4 of the first regeneration cabin 1 and the second regeneration cabin 2, wherein the voltage of the direct current conforms to a voltage formula
Wherein I is a current value, rho is the resistivity of the activated carbon, d is the distance from the electrode plate to the metal screen, S is the contact area of the electrode plate 4 and the activated carbon particles, and l is the height of the bulge on the metal screen 3; alpha and beta are constants, which are related to the material of the metal screen 3 and the current I; in the embodiment, alpha is 20V, and beta is 12000 A.V/m; in this example, I is 69.2A, ρ is 7 Ω · m, d is 0.1m, and S is 0.5m before activated carbon regeneration2And l is 0.008m, so the input voltage U is 152.6V. In the regeneration process, the resistivity of the activated carbon changes due to the temperature change, the controller calculates the real-time resistivity of the activated carbon according to the temperature measured by the temperature sensor, and feeds back and adjusts the voltage of the power supply, so that the voltage of the power supply always conforms to a voltage formula.
And step three, the active carbon particles roll due to vibration to enable the active carbon particles to be contacted and conducted randomly, the active carbon generates heat spontaneously due to electrification, and the active carbon generates heat uniformly due to rolling and random contact. And under the drive of the first mechanical vibrator 5 and the second mechanical vibrator 6, the first regeneration chamber 1 and the second regeneration chamber 2 vibrate up and down, and the protrusions of the metal screen 3 on the first regeneration chamber 1 and the second regeneration chamber 2 are contacted and separated along with the vibration, so that electric arcs are generated to release heat. The temperature of the activated carbon rises under the combined action of electric conduction and arc initiation, various impurities adsorbed by the activated carbon are desorbed, electrolyzed and pyrolyzed under the action of electrification and high temperature, and the activity of the activated carbon is recovered. Meanwhile, the electric arc forms an electric hammer effect, has a hole expanding effect on micropores inside the activated carbon, and improves the adsorption capacity of the regenerated activated carbon. Harmful exhaust gas released during electrolysis and pyrolysis is further decomposed by the electric arc while escaping through the pores of the metal mesh 3.
And step four, when the temperature sensor 7 detects that the temperature rises to a preset temperature (the preset temperature is a value within the range of 700-1000 ℃, preferably 800 ℃), the activated carbon is regenerated, the direct current input of the electrode plate 4 is stopped, the vibration of the first mechanical vibrator 5 and the second mechanical vibrator 6 is stopped, and the regenerated activated carbon particles in the first regeneration cabin 1 and the second regeneration cabin 2 are taken out through a discharge port (not shown in the figure).
Further description of low-pressure arc striking regeneration of activated carbon:
when the first and second regeneration chambers 1 and 2 vibrate up and down, the respective protrusions of the metal mesh 3 of the first and second regeneration chambers approach, contact and separate at the slit, and the following 3 factors are generated to initiate the arc: (1) when the contact bulge starts to move separately, the contact area is gradually reduced, the current density at the contact position is gradually increased, the metal at the contact position generates heat strongly, and free electrons on the surface of the metal escape to form thermal emission of electrons; (2) the distance between the separated bulges is very small, the electric field intensity between the bulges is very high, and free electrons pass through the potential barrier to escape from metal, so that field emission is formed; (3) charged particles such as electrons are accelerated under the action of an electric field until kinetic energy exceeds ionization energy of the charged particles, and other particles are collided in the advancing process to form collision ionization. Under the combined action of part or three of the three, part of electrons reach the metal screen mesh on the other side from the metal screen mesh on one side, bombard the metal surface and generate secondary emission, the electrons and positive ions generated by the secondary emission enter between the two metal screen meshes and continue to collide and ionize, and the reciprocating action generates more electrons and positive ions to form a plasma flow channel, namely an electric arc. Meanwhile, a large amount of energy is released in the collision and recombination process of electrons and positive ions and is released in the form of light and heat, so that the metal surface is further excited to generate photoionization and thermion, and arc combustion is aggravated. When the metal projections are far away on both sides of the arc, the strip is extinguished as the arc is elongated and energy is dissipated. Therefore, during the vibration of the first and second regeneration chambers 1 and 2, a large amount of electric arc is always generated and dissipated in the metal screen 3, the center temperature of the arc column of the electric arc is induced to exceed 4000 ℃, and the heat released by the electric arc and the joule heat generated by the current flowing through the activated carbon act together to activate the electric arcThe active carbon is heated to high temperature, so that various impurities adsorbed by the active carbon are desorbed, electrolyzed and pyrolyzed under the action of electrification and high temperature, pores of the active carbon are released, the active carbon is characterized to recover activity, and the regeneration is completed. Meanwhile, the current has a pulsation effect due to the generation and dissipation of a large amount of electric arcs, an electric hammer effect is formed, the micropores in the activated carbon are expanded, and a small amount of ozone generated by the excitation of the electric arcs further improves the regeneration effect of the activated carbon. In addition, the harmful exhaust gases released during regeneration are broken down into CO by electric arcs2、H2O and the like, and reduces the harm to the atmosphere.
Example 7:
this example differs from example 6 in that: the horizontal driving piece drives the first base 8, the distance between the first base 8 and the second base 9 is adjusted, so that the first regeneration cabin 1 is not contacted with the metal screen 3 of the second regeneration cabin 2, and the input direct current voltage is increased in the second step to accord with a voltage formula
Wherein p is the pressure intensity of the gap between the two metal screens 3, and the approximate value is 1.013 multiplied by 10 of atmospheric pressure5Pa and delta are the minimum distance between the metal screens 3 of the first regeneration chamber 1 and the second regeneration chamber 2, A, B is an empirical coefficient, and in the embodiment, A takes 20Pa-1m-1B takes a value of 120V/(Pa.m); gamma is a surface ionization coefficient, and is related to the material of the metal screen 3, in the embodiment, the metal screen 3 is made of copper material, and the value of gamma is 0.025; in this embodiment, δ is 0.0001m, and thus the input voltage U is 303.9V.
Gaps are arranged between the metal screens 3 of the first regeneration cabin 1 and the second regeneration cabin 2, the first regeneration cabin 1 and the second regeneration cabin 2 vibrate up and down under the driving of the first mechanical vibrator 5 and the second mechanical vibrator 6 in the third step, adjacent bulges of the metal screens 3 on the first regeneration cabin 1 and the second regeneration cabin 2 gradually approach and separate, but do not contact, and arc breakdown is generated to release heat. The temperature of the activated carbon rises under the combined action of electric conduction heat production and breakdown electric arc heat production, various impurities adsorbed by the activated carbon are desorbed, electrolyzed and pyrolyzed under the actions of electrification and high temperature, and the activity of the activated carbon is recovered. Meanwhile, electric arcs are punctured to form an electric hammer effect, the inner micropores of the activated carbon are expanded, and the adsorption capacity of the regenerated activated carbon is improved. Harmful exhaust gases released during electrolysis and pyrolysis are further decomposed by the breakdown arc as they escape through the pores of the metal mesh 3.
The advantages of this embodiment are: the friction of two metal mesh 3 is avoided to this embodiment, greatly reduced metal mesh 3's wearing and tearing can produce the longer electric arc of arc column simultaneously, and the heat production effect is better with the effect of decomposing waste gas, and the electric hammer effect of formation is stronger, is favorable to the regeneration effect of active carbon. The disadvantages of this embodiment are: the stability of the arc formation is reduced, while higher voltages are required, higher demands are made on the power supply and electrode materials, resulting in higher energy consumption.
Claims (10)
1. The utility model provides an active carbon low pressure striking regenerating unit, includes first regeneration cabin and electrode board, its characterized in that: the device also comprises a second regeneration cabin, a metal screen, a first mechanical vibrator and a second mechanical vibrator; the side, opposite to the first regeneration cabin and the second regeneration cabin, of the first regeneration cabin is open, and metal screens are fixed at the open side parts of the first regeneration cabin and the second regeneration cabin; one electrode plate is fixed on the other side of each of the first regeneration chamber and the second regeneration chamber, which is opposite to the metal screen; the electrode plates in the first regeneration cabin and the second regeneration cabin are respectively connected with the positive pole and the negative pole of a power supply; temperature sensors are arranged in the first regeneration chamber and the second regeneration chamber; the first regeneration cabin and the second regeneration cabin are respectively connected with the first mechanical vibrator and the second mechanical vibrator; the first mechanical vibrator and the second mechanical vibrator are respectively fixed on the first base and the second base; the first base is driven by a horizontal driving piece; the top surfaces of the first base and the second base are equal in height; the adjacent projections between the two wire screens gradually come closer and separate, creating an arc that releases heat.
2. The activated carbon low-pressure arc ignition regeneration device as claimed in claim 1, wherein: the metal screen is woven by metal wires, and the protrusions formed by surface interweaving present the uneven texture.
3. The activated carbon low-pressure arc ignition regeneration device as claimed in claim 2, wherein: the protrusions on the surface of the metal screen are pyramid-shaped.
4. The activated carbon low-pressure arc ignition regeneration device as claimed in claim 1, wherein: the horizontal driving piece adopts an electric cylinder or an electric sliding table.
5. The activated carbon low-pressure arc ignition regeneration device as claimed in claim 1, wherein: a first sliding guide column is fixed on the first base, and a second sliding guide column is fixed on the second base; the first sliding guide column and a guide block fixed on the outer side wall of the first regeneration cabin form a sliding pair, and the second sliding guide column and a guide block fixed on the outer side wall of the second regeneration cabin form a sliding pair.
6. The method for regenerating activated carbon by the activated carbon low-pressure arc ignition regenerating device according to any one of claims 1 to 5, wherein: the method comprises the following specific processes:
placing a horizontal driving piece, a first base and a second base on a flat ground; filling saturated activated carbon particles into the first regeneration cabin and the second regeneration cabin through the feed inlet; the horizontal driving piece drives the first base, and the distance between the first base and the second base is adjusted, so that the metal screen on the first regeneration cabin is in contact with the metal screen on the second regeneration cabin; then, setting the vibration frequency and the vibration amplitude of the first mechanical vibrator and the second mechanical vibrator, wherein the vibration amplitudes are both larger than the distance between two adjacent protrusions on the metal screen mesh, starting the first mechanical vibrator and the second mechanical vibrator to drive the first regeneration chamber and the second regeneration chamber to vibrate up and down, so that the saturated activated carbon particles in the first regeneration chamber and the second regeneration chamber roll, and mutually scraping off adsorbates on the surfaces of the saturated activated carbon particles;
step two,Inputting direct current to electrode plates of the first regeneration cabin and the second regeneration cabin, wherein the voltage of the direct current conforms to a voltage formula
Wherein I is a current value, rho is the resistivity of the activated carbon, d is the distance from the electrode plate to the metal screen, S is the contact area of the electrode plate and the activated carbon particles, and l is the height of the protrusion on the metal screen; alpha and beta are constants;
step three, the active carbon particles roll due to vibration to enable the active carbon particles to be contacted randomly and conduct electricity, the active carbon generates heat spontaneously due to electrification, and the active carbon generates heat uniformly due to rolling and random contact; under the drive of the first mechanical vibrator and the second mechanical vibrator, the first regeneration cabin and the second regeneration cabin vibrate up and down, and the bulges of the metal screens on the first regeneration cabin and the second regeneration cabin are contacted and separated continuously along with the vibration to generate electric arcs to release heat; the temperature of the activated carbon rises under the combined action of electric conduction heat production and arc ignition heat production, various impurities adsorbed by the activated carbon are desorbed, electrolyzed and pyrolyzed under the action of electrification and high temperature, and the activity of the activated carbon is recovered; meanwhile, the electric arc forms an electric hammer effect, has a hole expanding effect on micropores inside the activated carbon, and improves the adsorption capacity of the regenerated activated carbon; harmful exhaust gas released in the electrolysis and pyrolysis process is further decomposed by electric arc when escaping through the pores of the metal screen;
and step four, when the temperature sensor detects that the temperature rises to the preset temperature, the regeneration of the activated carbon is completed, the direct current input of the electrode plate is stopped, the vibration of the first mechanical vibrator and the second mechanical vibrator is stopped, and the regenerated activated carbon particles in the first regeneration cabin and the second regeneration cabin are taken out through the discharge hole.
7. The method for regenerating the activated carbon by the activated carbon low-pressure arc striking regenerating device according to the claim 6, characterized in that: the vibration frequencies of the first mechanical vibrator and the second mechanical vibrator are within the range of 10 Hz-100 Hz, and the vibration frequencies of the first mechanical vibrator and the second mechanical vibrator are different, so that the first regeneration chamber and the second regeneration chamber are ensured not to be relatively static.
8. The method for regenerating the activated carbon by the activated carbon low-pressure arc striking regenerating device according to the claim 6, characterized in that: the value of alpha is 10V-50V, and the value of beta is 10000 A.V/m-20000 A.V/m.
9. The method for regenerating the activated carbon by the activated carbon low-pressure arc striking regenerating device according to the claim 6, characterized in that: and in the second step, the resistivity of the activated carbon changes due to the temperature change, the controller calculates the real-time resistivity of the activated carbon according to the temperature measured by the temperature sensor, and feeds back and adjusts the voltage of the power supply, so that the voltage of the power supply always conforms to a voltage formula.
10. The method for regenerating activated carbon by the activated carbon low-pressure arc ignition regenerating device according to any one of claims 1 to 5, wherein: the method comprises the following specific processes:
placing a horizontal driving piece, a first base and a second base on a flat ground; filling saturated activated carbon particles into the first regeneration cabin and the second regeneration cabin through the feed inlet; the horizontal driving piece drives the first base, and the distance between the first base and the second base is adjusted, so that the minimum distance delta between the metal screens of the first regeneration chamber and the second regeneration chamber is less than 0.0005 m; then, setting the vibration frequency and the vibration amplitude of the first mechanical vibrator and the second mechanical vibrator, wherein the vibration amplitudes are both larger than the distance between two adjacent protrusions on the metal screen mesh, starting the first mechanical vibrator and the second mechanical vibrator to drive the first regeneration chamber and the second regeneration chamber to vibrate up and down, so that the saturated activated carbon particles in the first regeneration chamber and the second regeneration chamber roll, and mutually scraping off adsorbates on the surfaces of the saturated activated carbon particles;
step two, inputting direct current to electrode plates of the first regeneration cabin and the second regeneration cabin, wherein the voltage of the direct current conforms to a voltage formula
p is the pressure intensity of the gap between two metal screens, and the value is 1.013 multiplied by 10 of the atmospheric pressure5Pa, delta is the minimum distance between the metal screens of the first regeneration chamber and the second regeneration chamber, gamma is the surface ionization coefficient, A and B are empirical coefficients, and A is 10Pa-1m-1～30Pa-1m-1The value is in the range, and B is in the range of 50V/(Pa.m) -200V/(Pa.m);
step three, the active carbon particles roll due to vibration to enable the active carbon particles to be contacted randomly and conduct electricity, the active carbon generates heat spontaneously due to electrification, and the active carbon generates heat uniformly due to rolling and random contact; under the drive of the first mechanical vibrator and the second mechanical vibrator, the first regeneration cabin and the second regeneration cabin vibrate up and down, adjacent bulges of the metal screens on the first regeneration cabin and the second regeneration cabin gradually approach and separate but do not contact, and breakdown electric arcs are generated to release heat; the temperature of the activated carbon rises under the combined action of electric conduction heat production and breakdown electric arc heat production, various impurities adsorbed by the activated carbon are desorbed, electrolyzed and pyrolyzed under the action of electrification and high temperature, and the activity of the activated carbon is recovered; meanwhile, electric hammer effect is formed by breakdown of electric arc, and the electric hammer has a hole expanding effect on micropores inside the activated carbon, so that the adsorption capacity of the regenerated activated carbon is improved; harmful waste gas released in the electrolysis and pyrolysis process is further decomposed by breakdown electric arc when escaping through the pores of the metal screen;
and step four, when the temperature sensor detects that the temperature rises to the preset temperature, the regeneration of the activated carbon is completed, the direct current input of the electrode plate is stopped, the vibration of the first mechanical vibrator and the second mechanical vibrator is stopped, and the regenerated activated carbon particles in the first regeneration cabin and the second regeneration cabin are taken out through the discharge hole.
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