JP6550118B2 - How to separate powder - Google Patents

Description

  The invention of this application is a separation of powder that enables efficient separation of powder having different density differences (specific gravity differences) by vibration by vibration, impact action and fluidization by fine bubbles, and dispersion action. It relates to the method.

  In the past, coal-fired boiler equipment has often been used in boiler equipment such as thermal power plants. The exhaust gas from this coal-fired boiler facility contains a large amount of coal ash (dust), and if it is discharged as it is, the surrounding environment is adversely affected. For this reason, such coal ash is recovered using a predetermined dust collector (for example, a dry dust collector, a dry electrostatic dust collector, etc.), and many are treated as waste (for example, landfill). Moreover, some are called fly ash, and are utilized as a raw material of fly ash cement or as an admixture for cement.

  However, a considerable amount of reusable unburned carbon is also contained in the recovered coal ash, and it is a waste of energy resources to discard this together with the burned portion as it is. Moreover, when using a coal ash as raw materials, such as fly ash cement, when the amount of unburned coals is large, the surface of a concrete will be blackened and it will be accompanied by the problem of adsorbing an admixture etc.

  However, in recent coal-fired thermal power plants, the combustion temperature of the boiler part is kept low in consideration of the influence of nitrogen oxides on the surrounding environment, which causes more unburned coal in coal ash. Content tends to increase.

  Based on such circumstances, for example, an electrostatic separation method or centrifugal separation employing an electrostatic separation method as a separation method of powder for separating and recovering unburned carbon content in coal ash conventionally recovered as described above There have been proposed centrifugal separation methods adopting a method, and vibrational fluidized bed separation methods utilizing separation by vibration, fluidization by air flow, and dispersion.

  However, in the case of an electrostatic separation method employing an electrostatic separation method or a centrifugal separation method employing a centrifugal separation method, there is still room for improvement in terms of its separation performance and separation efficiency.

  On the other hand, in a vibrating fluid bed separation method using fluid separation by vibration and fluidization by air flow, and dispersion, for example, a separation container for containing used coal ash containing unburned coal is provided, A fluidized air supply space is provided at the bottom of the separation container, and a coal ash storage space is provided at the top, and they are partitioned by a diffuser plate having a diffuser having a pore diameter smaller than at least the diameter of the coal ash particles. A rotary excitation source such as a vibration motor is attached and vibrated, while fluidizing gas from a fluidizing gas generation source such as a compressor is supplied to the fluidizing gas supply space, and the inside of the separation vessel is supplied via a diffuser plate. It is comprised so that a fluidization gas may be flowed and isolate | separated (refer the structure of patent document 1).

  According to such a configuration, the separation container containing unseparated coal ash vibrates vertically at a predetermined frequency by driving the vibration source, and the accommodated coal ash and unburned coal move up and down due to the specific gravity difference. While the density is separated, the fluidization gas from the fluidization gas source is introduced into the fluidization gas supply space by the drive of the fluidization gas source, and it is lowered into the coal ash via the diffuser of the diffuser plate. The air is blown upward from the inside of the coal ash, and a predetermined amount of bubbles are generated in the coal ash to fluidize the entire coal ash to form a fluidized bed, and the highly adherent burned coal ash and non-adherent coal ash in the coal ash. The combustion coals are mutually dispersed.

  As a result, unburned coal having a small specific gravity floats to the upper layer, coal ash having a large specific gravity sinks to the lower layer, and separation of the both becomes relatively easy.

Patent No. 3362065

  However, in the case of the configuration of the above-mentioned conventional vibrating fluidized bed type separation method, as is apparent from the claims and the description of the specification, empty towers having a low flow velocity of 0.5 to 4.0 cm / sec. Fluidizing and dispersing the powder at a speed, setting the vibration frequency of the vibration source to 10 Hz or more, and setting the amplitude to 0.1 to 2.0 mm are essential requirements, and are added The vibration is a single vibration whose amplitude is constant in the vertical direction.

  According to experiments conducted by the applicant of the present invention, such low air flow velocity of 0.5 to 4.0 cm / sec contains many particles with high adhesion, for example, 5 to 10 μm or less in particle diameter. In the case of such coal ash, it is not possible to fluidize and disperse the coal ash in a stable state, and it is not possible to accurately separate unburned coal. On the other hand, if the inflowing rate of the gas supplied into the coal ash to increase this rate is increased, large bubbles will be generated in the coal ash, and the coal ash will be mixed on the contrary, causing separation failure. It becomes possible.

  Also, in the case where the applied vibration is a single vibration having a constant amplitude in the vertical direction, for example, the adhesion state of fine particles with a large particle size of 5 to 10 μm or less with high adhesion is effectively cut off and dispersed freely and fluidized. Can not always achieve effective density difference separation.

  In order to solve such a problem, the above-mentioned fine particles having a particle size of 5 to 10 μm or less, which are the bottleneck in advance, are removed or characteristics of various coal ash are individually analyzed, and tests are performed according to the characteristics. Therefore, it is necessary to determine the optimum gas supply rate and vibration conditions that can be properly dispersed and separated by the combination of fine bubbles and vibrations, which is extremely troublesome.

  The invention of this application has been made to solve the problems of such a conventional vibrational fluidized bed separation method of powder, and employs a plurality of excitation sources having different frequencies, An oscillating source generates an oscillating vibration whose amplitude is periodically changed, and the oscillating vibration adds impact and vibration to the powder in the separating container, and supplies it from the fluidizing gas source into the separating container. By making the bubbles of the fluidizing gas finer, it is possible to fluidize the powder in the separation container without increasing the inflow velocity, thereby making it possible to obtain powder particles of different density differences in the powder. It is an object of the present invention to provide a method for separating powder with improved separation efficiency by reducing the adhesive force and enhancing the dispersion effect of the powder.

  The invention of this application is configured to include the following means for solving the problems in order to solve the above-mentioned problems.

(1) Solution to Problem According to the Invention of Claim 1 According to the present invention, powders having different density differences are contained in a separation container, and vibration is given to the powder in the separation container using an excitation source, and A method for separating powder, wherein a fluidizing gas is supplied into a separation container to generate fluidizing bubbles in the powder in the separation container, and a plurality of vibration sources with different vibration frequencies are used as the vibration source. A vibration source is employed, and a plurality of vibration sources having different frequencies generate vibration around the inside of the separation container, and the vibration causes impact and vibration to the powder having different density difference in the separation container by the rotation vibration. While acting to reduce the adhesion between the powders having different density differences, the flow rate of the fluidization gas supplied into the separation vessel is made finer by increasing the inflow velocity. Fluidize the powder in the separation container without This is characterized in that the separation efficiency is improved by effectively reducing the adhesion between the powders having different density differences in the powders and enhancing the dispersion effect of the powders.

  As described above, powders having different density differences to be separated are accommodated in the separation container, and the powder in the separation container is vibrated using the vibration source, and the fluidizing gas is supplied into the separation container. In the powder separation method in which fluidizing bubbles are generated in the powder in the separation container, a plurality of vibration sources having different frequencies are adopted as the vibration source, and A plurality of different vibration sources generate an oscillating vibration whose amplitude periodically changes in the separation container, and the oscillating vibration gives impact and action to powder having different density difference in the separating container, and If the powder in the separation container is made to fluidize without increasing the inflow velocity by making the bubbles of the fluidizing gas supplied into the separation container fine, the following beneficial effects can be obtained. An action is obtained.

  That is, first, the adhesion between the powder particles having high adhesion is reduced by vibration and impact action of the vibrating vibration acting on the powder having different density difference in the separation container, as a result, the dispersibility of the powder particles, Improve liquidity. As a result, the separation performance of the density difference separation due to the inherent vibration is enhanced.

  Next, with respect to the powder in the separation container in which the dispersibility and flowability of the powder particles are improved in this way, the fluidizing gas for fluidizing the powder further has a high flow rate. It is introduced in the form of fine bubbles without As a result, as described above, powders having improved dispersibility and fluidity of particles due to vibration become effectively fluidized in the separation container without further mixing, and powders having different density differences are obtained. Since the adhesion between the two is more effectively reduced and the dispersion effect is further enhanced, the separation efficiency of the density difference separation by the above-mentioned original vibration is further improved.

(2) The problem solution means according to the invention of claim 2 According to the present invention, in the configuration of the means for solution of the problem of the invention according to claim 1, a plurality of excitation sources different in frequency are a plurality of sets of plural different frequencies. It is characterized in that a plurality of sets of vibration sources of different frequencies are provided at predetermined intervals on the outer peripheral side of the separation container.

  Thus, a plurality of sets of excitation sources having different frequencies are provided in the circumferential direction of the outer peripheral side of the separation container containing the powder having different density differences to be separated, and a plurality of sets of excitations having different frequencies. When the vibration is applied to the powder in the separation container from the source to periodically change the amplitude, the powder part in the separation container is more effectively interfered with the vibration. Thus, the impact force can be applied to the powder more effectively.

(3) The problem solution means according to the invention of claim 3 In the structure of the solution means according to the invention of claim 1, the present invention is characterized in that the plurality of excitation sources having different frequencies are outside the separation container. there the separation container on the upper side of the vibration source and the separation vessel to vibrate is characterized in Rukoto such from vibration source to vibrate the vibrating body inside the separation vessel.

As described above, the plurality of excitation sources having different frequencies in the configuration of the solution of the invention according to the first aspect of the present invention are located outside the separation container and on the upper side of the excitation source and the separation container that vibrate the separation container. When the vibration source inside the separation container is configured to vibrate , the amplitude periodically changes in both the inside and the outside of the separation container with respect to the powder different in density difference to be separated which is accommodated in the separation container. Since it is possible to apply the rotational vibration, the powder portions having different density differences in the separation container cause an effective mutual interference of the rotational vibration, and more effectively exert an impact force on the powder. Will be able to

  In this case, it is also possible to make a plurality of sets of excitation sources with different frequencies outside the separation container. If so, an impact force is more likely to occur.

  As a result of the above, according to the powder separation method of the invention of this application, the adhesion is effectively reduced even in the case of coal ash or the like in which a large number of fine particles with a high adhesion particle diameter of 10 μm or less are contained. As a result, coal ash can be fluidized and dispersed in a stable state, and unburned carbon can be separated with high accuracy.

  Therefore, it is not necessary to increase the flow velocity of the supplied gas more than necessary, and large bubbles are not generated in the coal ash, so that stable operation can be performed without causing the conventional mixed state.

  As a result, the recovery efficiency of unburned coal is improved, and energy resources can be used as effectively as possible. In addition, even when fired coal ash obtained by separating and recovering unburned coal is used as a raw material of fly ash cement, problems such as blackening of the surface of the concrete and adsorption of admixtures do not occur.

  Furthermore, the separation method of the powder of the invention of this application can be applied not only to the separation of unburned coal in the above coal ash but also to the separation of mixed powder having a large difference in specific gravity and shape, for example, papermaking sludge ash It can also be used for density difference separation of wastes such as waste incineration ash, sewage sludge incineration ash, biomass incineration ash, etc., and density difference separation of pharmaceuticals and mineral raw materials.

It is sectional drawing which shows the basic composition of the apparatus main-body part of the vibrational fluidized bed type separation apparatus of the powder which concerns on the 1st form for implementing the isolation | separation method of the powder of invention of this application. It is a top view which shows the basic composition of the said apparatus main-body part. Example of a first synthetic waveform of the wobbling vibration that occurs in the coal ash portion when the plurality of vibration generators of the same device main part are operated under the first number of operation and the first operation condition ((a) has an amplitude (( b) shows the acceleration ratio). The second synthetic waveform example of the wobbling vibration that occurs in the coal ash portion when the plurality of vibration generators in the same device main unit are operated under the second operation number and the second operation condition ((a) represents the amplitude, ( b) shows the acceleration ratio). Third synthetic waveform example of whistling vibration that occurs in the coal ash portion when the plurality of vibration generators in the main body portion are operated under the third operation number and the third operation condition ((a) represents the amplitude, ( b) shows the acceleration ratio). Example of the 4th synthetic waveform of the whirling vibration which occurs in the coal ash portion when the plurality of vibration generators of the same device main part are operated under the fourth number of operation and the fourth operation condition ((a) b) shows the acceleration ratio). The fifth example of the synthetic waveform of the whistling vibration that occurs in the coal ash portion when the plurality of vibration generators in the main unit of the unit are operated under the fifth operation number and the fifth operation condition ((a) represents the amplitude, ( b) shows the acceleration ratio). The sixth synthetic waveform example of the whistling vibration that occurs in the coal ash portion when the plurality of vibration generators in the same device main unit are operated under the sixth operation number and the sixth operation condition ((a) shows the amplitude, ( b) shows the acceleration ratio). An accessory device, a sensor, a control device, etc. necessary for the device main body of the vibrating fluidized bed type separator of powder according to the first embodiment for carrying out the powder separation method of the invention of this application are added It is a figure showing composition of a control system. Based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of this application, a charge removing function is provided to fluidizing air in the same device. It is a figure which shows the structure of the apparatus main body and control system part of a vibrating fluidized-bed-type separator of powder based on 2nd form for implementing the isolation | separation method of powder of invention of this application. Based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of this application, the apparatus is separated on the side upper side of the separation container in the same device. A powder separation method according to the invention of this application is provided with an unburned coal discharge duct for discharging unburned coal and a rotatable unburned carbon pushing screver in a separation container to discharge unburned coal. It is sectional drawing which shows the structure of the apparatus main-body part of the vibrational fluidized bed type separation apparatus of the powder which concerns on the 3rd form for implementing. It is a top view which shows the structure and effect | action of the screever in the apparatus main body of the same FIG. Based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of this application, the apparatus is separated on the side upper side of the separation container in the same device. A powder according to a fourth mode for carrying out the powder separation method of the invention of the present application, wherein an unburned coal discharge duct for discharging unburned coal is provided and an air pipe for discharging unburned coal is provided in the separation container. It is sectional drawing which shows the structure of the apparatus main-body part of the vibrational fluidized bed type separation apparatus of a body. It is a top view which shows the structure and effect | action of the air pipe part in the apparatus main body of the same FIG. Based on the configuration of a vibrating fluidized bed type separator for powder according to a first embodiment for carrying out the method of separating powder according to the invention of this application, it was separated on the side above the side of the separation container in the same device. There is provided an unburned coal discharge duct for discharging unburned coal, and a weir member for scooping unburned coal in the separation container and flowing it to the discharge duct side is provided, for carrying out the powder separation method of the invention of this application. FIG. 6 is a cross-sectional view showing the configuration of an apparatus main body portion of a vibrating fluidized bed separator of powder according to a fifth embodiment. It is sectional drawing (AA sectional drawing of FIG. 15) of the principal part of the wedge member of the same FIG. Based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of this application, for charging of coal ash to the side of the separation container in the same device It is sectional drawing which shows the structure of the apparatus main-body part of the vibration fluidized-bed-type separator of the powder based on 6th form for implementing the isolation | separation method of the powder of this invention of this application which provided duct. Based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the method for separating powder of the invention of this application, the inside provided in the central portion of the separation container in the same device In a vibration fluidized bed type separator for powder according to a seventh embodiment for carrying out the method for separating powder according to the invention of the present application, wherein coal ash is charged into a separation container using a vibrator. It is sectional drawing which shows the structure of an apparatus main-body part. Based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the method of separating powder according to the invention of this application, coal after separation of unburned coal by air lift type in the same device is assumed. Sectional drawing which shows the structure of the apparatus main-body part of the vibrating fluidized-bed-type separator of the powder based on 8th form for implementing the isolation | separation method of the powder of this invention which discharged ash outside. It is. Based on the configuration of the vibrating fluidized-bed separator for powder according to the first embodiment for carrying out the powder separation method of the invention of this application, a plurality of vibratory fluidized-bed separators of the same configuration are used. FIG. 16 shows a configuration of an apparatus main body portion of a vibrating fluidized bed type separator of a powder according to a ninth embodiment for implementing the powder separation method of the invention of this application combined It is a whole view.

  Hereinafter, with reference to FIGS. 1 to 15, several embodiments for carrying out the powder separation method of the invention of this application will be specifically described. In each of the embodiments described below, the used coal coming from a boiler facility such as a coal-fired power plant, for example, is used as an example of a vibrating fluidized bed type separator for powder according to the powder separation method of the invention of this application. It shows about the structure of the coal ash unburned-parts separation apparatus applied to isolation | separation collection | recovery of the unburned carbon component (henceforth, only coal ash) in ash (henceforth coal ash).

<First embodiment for carrying out the powder separation method of the invention of this application>
First, FIG. 1 and FIG. 2 show the basic configuration of the apparatus main body portion of the vibrating fluidized bed type separator of powder according to the first embodiment for carrying out the powder separation method of the invention of this application. There is.
(Configuration of the device body)
That is, the device body of this vibrating fluidized bed type separation device is roughly divided into one that has been burned once in a boiler facility, but is still charged with used coal ash C containing a predetermined amount of unburned carbon component C2 A large diameter cylindrical separation vessel 1 of a predetermined height, which is a vibrating body (external vibrating body), and vibration-proof members D, D,... Of a predetermined spring constant supporting the separation vessel 1 in a vibratable state. The plurality of (eight) first vibration generators 2a to 2h disposed on the outer periphery on the bottom side of the separation container 1 and the upper part of the separation container 1 are inserted downward from above and separated A small-diameter cylindrical internal vibrator 3 having a predetermined length, which is a suspended object located at the central axis O of the container 1, and a plurality provided on the outer periphery on the upper end side of the internal vibrator 3 It consists of a second (two) vibration generators 4a and 4b.

  The inside of the separation container 1 is divided into two space parts of a coal ash storage space 1A on the upper side with a large volume and a fluidized air introduction space 1B on the lower side with a small volume via a diffuser plate 5 having a large number of aeration holes. While the used coal ash C containing unburned carbon C2 is stored in the upper side coal ash storage space 1A up to the vicinity of the upper end opening, it is stored in the bottom side fluidizing air introduction space 1B. The fluidizing air is supplied from a fluidizing air generator 14 described later via a fluidizing air supply line 18. The fluidizing air supplied into the fluidizing air introduction space 1B is blown into the coal ash C through the many aerations of the aeration plates 5, and uniformly in the coal ash C as fine bubbles. Ascends and fluidizes the whole of the coal ash C appropriately to form a fluidized bed of coal ash C. The code 1 f is a fluidizing air inlet (connection port of the fluidizing air supply line 18) to the fluidizing air introducing space 1 B.

  The diffuser plate 5 is made of, for example, a polymer plate of a predetermined thickness having a large number of air bubbles with a pore diameter smaller than the particle diameter 5 to 10 μm of the fine powder having the smallest particle diameter in the coal ash C, The fluidizing air of a predetermined pressure pumped from the fluidizing air introducing space 1B side is uniformly blown into the coal ash containing space 1A as described above, and the whole in the coal ash C in the coal ash containing space 1A Uniformly generate a large number of fine bubbles rising from the bottom to the top, and by the large number of fine rising bubbles, a large number of fine rising spaces in the coal ash C containing the unburned carbon C2 By forming, for example, the particle diameter is as small as 10 μm or less, coal ash particles which are likely to adhere to each other as they are, are effectively dispersed and fluidized.

  In the first vibration generators 2a to 2h, for example, two fan-shaped eccentric weights are provided at the tip of the rotor shaft of an induction motor (three-phase or single phase) of inverter control system, and strong centrifugal vibration is It consists of a vibration motor to generate. One of the two fan-shaped eccentric weights of the same vibration motor is a fixed weight fixed to the rotor shaft, and the other is an adjustment weight capable of adjusting the mounting angle relative to the fixed weight. By changing the relative angle, for example, the centrifugal force generated in the range of 0 to 100% can be adjusted. The centrifugal vibration caused by the rotation (eccentric rotation) as shown by the arrows in FIGS. 1 and 2 of the rotor shaft of this vibration motor is basically a sine wave vibration, and the centrifugal vibration of this sine wave (FIG. 1 When the arrow) is transmitted to the separation container 1 which is a portion to be vibrated through predetermined vibration transmission members 7, 7... Described later, the centrifugal vibration of the sine wave transmitted to the separation container 1 is transmitted. Sine-wave vibration (oscillation) in the horizontal direction according to

  That is, in the case of the configuration of the first embodiment, the first vibration generators 2a to 2h are the bottom outer peripheral side attachment portions 1a to 1d of the separation container 1 via the predetermined vibration transfer members 7, 7. , And the centrifugal vibration of the sine waves of the first vibration generators 2a to 2h is transmitted to the bottom of the separation container 1 through the vibration transmission member 7 and the attachment parts 1a to 1d, and the separation container 1 oscillates (swings) in the horizontal direction according to the centrifugal vibration of the same sine wave.

  By the way, in the case of this embodiment, each of the eight first vibration generators 2a to 2h is, for example, two as shown in FIG. 2 (a plan view of the apparatus main body in FIG. 1 seen from the upper side). Four sets of circumferential ones are provided adjacent to each other as one set (one unit) of 2a and 2b, 2c and 2d, 2e and 2f, and 2g and 2h, respectively. Are attached to the bottom outer periphery (the outer periphery of the fluidizing air introduction space 1B portion) of the separation container 1 at intervals of 90 degrees in the circumferential direction using common attachment portions 1a, 1b, 1c, 1d and 1e. ing.

  The inverter operating frequency (frequency) of each of the first vibration generators 2a to 2h is, for example, the back side 2a = 83 Hz, 2b = 80 Hz, right side 2c = 77 Hz, 2d = 74 Hz, front side 2e = 95 Hz, 2 f = 92 Hz, left side 2 g = 89 Hz, 2 h = 86 Hz etc., and the inverter operation frequency difference between the directly adjacent 2 a and 2 b, 2 c and 2 d, 2 e and 2 f, 2 g and 2 h Difference in inverter operation frequency between adjacent 2b and 2c, 2d and 2e, 2f and 2g, 2h and 2a (the frequency difference is 3 Hz and 90 degrees in the circumferential direction) Vibration generators 2a and 2e, 2b and 2f, 2f and 2f, 2c and 2g, 2) whose positional relationship is opposite to each other through the central axis O of the separation container 1 respectively. The differences (frequency differences) between inverter operating frequencies between d and 2h are set to be 12 Hz, 12 Hz, 12 Hz, 12 Hz and 12 Hz, respectively.

  Now, assuming that all of the eight first vibration generators 2a to 2h are driven and the operating conditions are in the above-mentioned operating frequency relationship (frequency relationship), the respective vibration generators 2a to 2h And the vibration generating members 2a to 2h slightly different in operating frequency from each other via the vibration transmitting members 7, 7 ···, the separation container 1 as the outer vibrating body (external vibrating body) The centrifugal force vibration of the sine wave transmitted to each other interferes with each other in the separation vessel 1 and the coal ash C portion, and is synthesized to the same separation vessel 1 and the coal ash C portion, for example, as shown in FIG. With an amplitude as shown, and an acceleration ratio as shown in FIG. 3 (b), a wobbling vibration consisting of a composite wave whose amplitude changes periodically is generated. Then, with this predetermined acceleration ratio, the vibration with cyclically changing amplitude causes the separation container 1 to rock complexly in the horizontal plane direction, and periodically mechanical to the coal ash C portion in the separation container 1 An impact force is generated, and this mechanical impact force breaks the adhesion between the fired coal ash C1 and the unburned carbon C2 to effectively separate.

  The oscillations shown in (a) and (b) of FIG. 3 particularly oppose each other through the central axis O of the above-mentioned separation container 1 where there is a difference (a difference in frequency) between the inverter operating frequencies of 12 Hz. The vibration generators 2a and 2e, 2b and 2f, 2c and 2g, and 2d and 2h which are in a positional relationship are effectively generated.

  The waveforms of the wobbling vibration shown in (a) and (b) of FIG. 3 are as shown in FIG. 1 and FIG. 2 under the above-mentioned operating conditions (inverter operating frequency (frequency)). Although all the first vibration generators 2a to 2h (eight units) installed in the positional relationship are operated, the number and operation conditions of the first vibration generators 2a to 2h are as follows. Various modifications are possible, whereby the form (amplitude, acceleration ratio, etc.) of the wobbling generated can be adjusted as desired.

  For example, assuming that the first vibration generators to be operated are the four on the front side and the left side 2e to 2h, and they are operated under the same operating conditions as in the case of (a) and (b) in FIG. The vibration becomes an oscillation with an amplitude and acceleration ratio such as (a) and (b) in (4).

  Also, for example, when the first vibration generator to be operated is only the two front side 2e and 2f and they are operated under the same operating conditions as in the case of (a) and (b) of FIG. The vibration is small as shown in (a) and (b), and the vibration is an acceleration ratio.

  Also, for example, the first vibration generators to be operated are eight units 2a to 2h as in the case of (a) and (b) in FIG. 3 described above, but the adjacent first vibration generators 2a and 2b, If the difference (frequency difference) between the inverter operating frequencies between 2c and 2d, 2e and 2f, and 2g and 2h is reduced from 3 Hz to 2 Hz, for example, the amplitudes and accelerations as shown in (a) and (b) of FIG. It becomes a relative vibration.

  Also, for example, four first vibration generators to be operated are the front side and the left side 2e to 2h, and the same operating conditions (inverter operating frequency as in the case of (a) and (b) in FIG. When the difference (difference in frequency) is 2 Hz, for example, vibration with an amplitude and acceleration ratio as shown in (a) and (b) of FIG. 7 results.

  Also, for example, the first vibration generator to be operated is only the two front side 2e and 2f, and the same operating conditions (difference in inverter operating frequency (the inverter operating frequency as in the case of (a) and (b) in FIG. When the operation is performed at a frequency difference of 2 Hz), for example, vibration with small amplitude and acceleration ratio as shown in (a) and (b) of FIG. 8 results.

  As described above, the first vibration generators 2a to 2h have appropriate vibration frequencies according to specific control conditions by changing the operating conditions (the inverter operating frequency and the difference between the same frequencies) and the number of operating units. The vibration characteristics such as the acceleration ratio, the amplitude, and the like are varied, and an impact action with high separation efficiency is realized.

  On the other hand, the internal vibrator 3 is formed of a small diameter cylindrical body whose inside is long in the vertical direction is hollow and located at the central axial portion O in the coal ash storage space 1A of the separation container 1 from the upper side to the lower side , And is suspended without being in contact with the aeration plate 5 described above. A plurality of (two) second vibration generators 4a and 4b formed of vibration motors similar to the first vibration generators 2a to 2h are provided on the outer periphery of the upper end portion of the internal vibration body 3 ing. For example, as shown in FIG. 2, these two second vibration generators 4a and 4b are provided on both sides of the internal vibrator 3 at different positions 180 degrees from each other, and each of the above-mentioned first vibration generators It is provided in a state of facing between 2c and 2d and between 2e and 2f, and as in the case of the first vibration generators 2a to 2h, mounting on the internal vibrating body 3 side via the vibration transfer members 7 and 7, respectively. It is connected and attached to the parts 3a and 3b.

  Also in this case, the second vibration generators 4a and 4b generate centrifugal vibration of a sine wave having a predetermined vibration frequency (inverter operating frequency) set by the eccentric rotation of the rotor shaft, The centrifugal vibration of the sine wave is transmitted to the internal vibrator 3 to cause the internal vibrator 3 to vibrate in the horizontal direction (swing), but it is also predetermined between the second vibration generators 4a and 4b. Difference between the inverter operation frequencies (frequency) and the adjacent vibration generators 4a and 4b, which are in the mutually opposing positional relationship via the coal ash C in the separation vessel 1 with respect to the second vibration generators 4a and 4b. Between the first vibration generators 2g, 2h and 2c, 2d, a difference of a predetermined inverter operating frequency (frequency) is provided.

  For this reason, the sine wave vibration generated in the same internal vibrator 3 itself is also the same vibration as in the case of the above-mentioned separation container 1, and the two vibration generators 4a, 4b and the coal ash C mutually oppose each other. Similarly, vibration is generated between the two sets of first vibration generators 2g, 2h and 2c, 2d, so that the coal ash C itself is effectively subjected to a vibration accompanied by an impact.

  As a result, both of the separation container 1 and the internal vibrator 3 cause the rotational vibration as shown in FIGS. 3 to 8 in which the amplitude changes periodically, and the unburned coal C2 accommodated in the separation container 1 The coal ash C containing the above is the above-mentioned radially outer first vibration generators 2a, 2b, 2c, 2d, 2e, 2f, 2g and 2h, and the radially inner second vibration generator 4a, The vibration from 4b and the above-mentioned second vibration generators 4a, 4b and coal ash C cause two sets of first vibration generators 2g, 2h and 2c, 2d to be opposed to each other. Under the effective impact force caused by the vibration, the adhesion of coal ash C1 of 5 to 10 μm or less with high adhesion as described above and unburned carbon C2 having a density difference (specific gravity difference) is effectively cut off And by the fine air bubbles supplied through the aeration plate 5 Effectively dispersed, fluidized, denser coal ash C1 sinks downward while less dense unburned coal C2 is collected in the upper part of the coal ash storage space 1A, resulting in effective separation Is realized.

  In particular, in the case of the above configuration, even if the volume of the coal ash storage space 1A in the separation container 1 is increased in order to increase the processing capacity, the stored coal ash C is only from the separation container 1 side. Since an effective and uniform separation action from both the inside and the outside is realized by receiving an impact and separation action due to a rotational vibration from the internal vibrator 3 side, high separation efficiency can be maintained.

  In this way, in the case of a vibrating fluidized bed type separator which separates the unburned carbon C2 by giving vibration to the coal ash C containing the unburned carbon C2 to be separated from both outside and inside of the separation vessel 1 To improve the vibration frequency of each of the plurality of vibration generators 2a to 2h, 4a and 4b inside and outside, the difference in vibration frequency among the vibration generators 2a to 2h, 4a and 4b, It is necessary to optimally adjust the number of operation of the vibration generators 2a to 2h, 4a, 4b, etc., and it is possible to obtain the vibration form and the vibration characteristic with high separation efficiency for the first time.

  To this end, in the first embodiment of the vibrating fluidized bed type separation apparatus, in addition to the basic configuration of the apparatus main body as described above, various sensors as described next and desired sensors using the same sensor and accessories will be described. It is configured with a device.

(Configuration of sensor, control device, accessory device part)
That is, in the case of the vibrating fluidized bed type separation apparatus of the first embodiment, as shown in FIG. 9, for example, coal ash in the above-described coal ash storage space 1A is further added to the apparatus main body having the configuration of FIGS. Powder temperature detection sensor 11 for detecting the temperature of C, rotation torque meter 12 for detecting the rotational torque of the coal ash C fluid bed portion in the coal ash storage space 1A, coal ash C flow in the coal ash storage space 1A A pressure detector 13 for detecting the pressure of the fluidized bed, a fluidized air generator 14 for generating fluidized air supplied to the fluidized air introduction space 1B of the separation vessel 1, and fluidized air of the separation tank 1; Electric heater 15 for warming fluidization air supplied to the introduction space 1B, coal ash temperature detection value a of the powder temperature detection sensor 11, rotation torque detection value b of the rotation torque detector 12, fluid bed pressure detector 13 coal ash C fluid bed Minute fluid bed pressure detection value c is input, the driving states of the first vibration generators 2a to 2h and the second vibration generators 4a and 4b, the amount of air supplied to the fluidizing air generator 14, the electric heater A control device 17 or the like for controlling the heat generation temperature of 15 is attached respectively.

  The powder temperature detection sensor 11 for detecting the temperature of the coal ash C in the coal ash storage space 1A has an insertion pipe 11a extending downward from the sensor main body by a predetermined length, and a temperature detection means such as a thermistor at its tip Is provided. And the electric signal from the same temperature detection means part is output as a temperature detection signal of coal ash. Further, the rotational torque detector 12 for detecting the rotational torque of the coal ash C fluidized bed portion in the coal ash storage space 1A has a rotational shaft extending downward from the detector main body portion by a predetermined length, It has a rotating body 12a that rotates according to the flow of ash, and outputs an electric signal according to the rotational torque of the rotating body 12a as a rotational torque detection value. The pressure detector 13 which detects the fluidized bed pressure of the coal ash C fluid bed portion in the coal ash storage space 1A as it is, the pressure in which the pressure detection sensor portion of the detector main body is provided in the side wall portion of the separation tank 1 The sensor is attached in communication with the 1 g portion of the sensor mounting port, and an electric signal corresponding to the pressure of the coal ash fluidized bed in the separation tank 1 is output as a coal ash fluidized bed pressure detection signal.

  The fluidizing air generator 14 comprises, for example, a compressor, a blower or the like, and after raising the outside air to a predetermined pressure or higher, the fluidizing air generator 14 is disposed at the bottom of the separation container 1 via the fluidizing air supply line 18. The fluidization air introduction space 1B is supplied. Further, the electric heater 15 is driven by, for example, an AC power supply 16 capable of adjusting a power supply voltage, generates heat according to the AC power supply voltage adjusted to the predetermined value, and the fluidizing air generating device 14 The fluidizing air supplied to the fluidizing air introduction space 1B at the bottom of the separation container 1 is heated to a predetermined temperature.

  Furthermore, the control device 17 is configured to include, for example, a microcomputer or other computer control unit and a necessary display. For example, the coal ash temperature detection value a by the coal ash temperature detection sensor 11, the rotation torque detector 12 The rotational torque detection value b and the fluidized bed pressure detection value c of the fluidized bed portion of the coal ash C by the fluidized bed pressure detector 13 are input, and the first vibration generators 2a to 2h, the second vibration generator 4a 4b, the drive frequency, the drive frequency difference, the supply air amount of the fluidizing air introduction space 1B from the fluidizing air generator 14, the heat generation temperature of the electric heater 15 for heating the supplied air, etc. Control to achieve optimum separation efficiency.

  As described above, a plurality of excitation sources in both the inside and outside of the first external vibration generators 2a to 2h provided in the separation container 1 and the second internal vibration generators 4a and 4b provided on the internal vibrator 3 From the above, if the coal ash C in the separation container 1 is given a cyclic vibration whose amplitude changes periodically, the mechanical impact force due to the interference of a plurality of the rotational vibrations in the coal ash C portion in the separation container 1 Adhesion is reduced between fine powders with different density differences to be separated, such as unburned coal C2 and burnt coal ash C1 with small particle size in coal ash C and high adhesion. The quality is greatly improved.

  On the other hand, on the bottom side of the separation container 1, a large number of air-voids having a pore diameter smaller than or approximately equal to the particle diameter 5 μm of the smallest particle diameter in coal ash C containing unburned carbon C2 A fluidizing gas supply section 1B having a diffuser plate 5 is provided to supply a large number of fine fluidizing bubbles to the whole of the coal ash C in the separation container 1.

  In this way, the mechanical impact force due to the above-mentioned rotational vibration reduces the adhesion between the fine powders having different density differences to be separated, and the undispersed coal C2 with small particle size with improved dispersibility and burned The particles of coal ash C1 are largely fluidized by a large number of fine bubbles (fine spaces) rising uniformly throughout coal ash C, and the separation effect between fine powders having different density differences to be separated is This greatly improves and enables effective density difference separation.

  In that case, the first vibration generators 2a to 2h and the second vibration generators 4a and 4b for generating the above-mentioned wobbling vibration have vibration frequencies of the respective vibration generators 2a to 2h, 4a and 4b. , Difference in vibration frequency among the respective vibration generators 2a to 2h, 4a, 4b, the number of driven vibration generators 2a to 2h, 4a, 4b, and fluidizing air from the fluidizing air generator 14 The controller 17 is provided to control the amount of supply, etc., and appropriate adjustment control of the generation level of the above-mentioned whirling vibration, vibration characteristics, the generation amount of fluidization bubbles, etc. is performed.

  As described above, in the configuration of the vibrating fluidized bed separation device according to the first embodiment, the amplitude of the fine powder in the separation container 1 from the plurality of excitation sources provided in the separation container 1 both inside and outside is provided. Provides a periodically changing oscillating vibration to generate mechanical impact force along with the vibration on the powder part, while providing a source of fluidizing gas on the bottom side of the separation container 1 and appropriately adjusting the amount supplied By controlling, it is made to generate fine fluidization bubbles without causing mixing in the powder in the separation container 1, and fluidization and dispersion by the mechanical impact force and fine fluidization bubbles by those rotational vibration. The synergetic effect of the promoting action reduces the adhesion between fine powders having different density differences to be separated, thereby enhancing the dispersion effect and enabling effective density difference separation.

  Then, in order to most effectively produce the mechanical impact force by the same rotational vibration and the fluidization promoting action by the fine fluidization bubbles, the vibration frequency of each of the plurality of excitation sources, the plurality of excitations It is necessary to appropriately control the difference in vibration frequency between the sources, the number of driven vibration sources, the supply amount of the fluidizing gas from the gas source, and the like.

  For this reason, in the vibrating fluidized bed type separator according to the first embodiment, the vibration frequencies of the first vibration generators 2a to 2h and the second vibration generators 4a and 4b, which are the plurality of vibration sources, respectively. The difference in vibration frequency among the vibration generators 2a to 2h, 4a, 4b, the number of driven vibration generators 2a to 2h, 4a, 4b, and the supply of fluidizing air from the fluidizing air generator 14 The controller 17 is provided to control the amount etc. in the optimum state, and the generation level of the above-mentioned vibration, vibration characteristics, the generation amount of fluidizing bubbles, etc., the mechanical impact force by the above-mentioned vibration and the fine fluidization The fluidization promoting action by air bubbles is most effectively generated, and it is possible to adjust to an appropriate operating condition capable of enhancing the separation effect as much as possible.

  Of course, in order to perform such control more appropriately, as described above, the temperature of the coal ash C in the separation vessel 1, the fine powder density of the coal ash C fluidized bed portion, viscosity and the like are also detected. It is preferable to perform more effective control as a control parameter.

  As a result of these, according to the vibrating fluidized bed type separation device of the powder of the first embodiment, even in the case of coal ash or the like in which a large number of fine particles with a particle size of 5 to 10 μm or less with high adhesion are contained. The adhesion can be reduced, and the coal ash can be fluidized and dispersed in a stable state, and the unburned carbon can be separated with high accuracy. Therefore, there is no need to increase the velocity of the tower more than necessary, and large bubbles are not generated in the coal ash, so stable operation is possible.

  As a result, the recovery efficiency of unburned coal is improved, and energy resources can be used as effectively as possible. In addition, even when the burned coal ash C1 from which the unburned carbon C2 is separated and collected is used as a raw material for fly ash cement, the conventional problem does not occur.

Second Embodiment for Implementing the Invention of this Application
Next, FIG. 10 is premised on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of the above-mentioned application, in the coal ash in the same device. The structure of the vibrating fluidized-bed-type separator of the powder based on the 2nd form for implementing the invention of this application which provided the static elimination function with respect to the supplied fluidization air is shown.
The coal ash C emitted from the boiler equipment such as the above coal-fired power plant has a predetermined level of static electricity, and the adsorption force is generated between the burned coal ash particles C1 and the unburned carbon particles C2 under the influence of the static electricity. As a result, there is a problem that the above-mentioned dispersion, flow and separation effects are reduced.

  The second embodiment is configured to solve such a problem, and as described, the purge air generator 23 for blowing out a predetermined amount of air and the purge air from the purge air generator 23 are described above. A purge air supply line 19 for supplying the inside of the fluidization air supply space 1b at the bottom of the separation container 1 and a positive charge on constituent molecules of purge air flowing in the purge air supply line 19 are provided in the middle of the purge air supply line 19 A charge removing air supply device is provided which comprises a charge removing device 20 for supplying the charge removal agent 20 and a purge air supply nozzle 22 provided on the tip end side of the purge air supply line 19. The purge air supply nozzle 22 is configured to have a predetermined length, and the nozzle insertion port provided with the tip side nozzle port (the blowout port) in the side wall of the fluidizing air supply space 1b at the bottom of the separation container 1 It is installed in such a manner that a predetermined length is inserted into the interior from 21. The configurations of the other parts are all the same as those of the first embodiment, and have the same effects.

  According to such a configuration, the molecules of the fluidizing air supplied into the fluidizing air supply space 1b at the bottom of the separation container 1 are charged with positive or negative polarity charge by the purge air from the purge air generator 23. It will be charged, and the molecule | numerator of fluidization air charged same or negative will be supplied in the coal ash accommodation space 1A of the said separation container 1 through the aeration of the diffuser plate 5 mentioned above. .

As a result, due to the air, the ion balance among the constituent particles of the coal ash C including the unburned coal becomes good, the adhesion by static electricity decreases, and the dispersibility, flowability, and separability improve.
The amount of purge air generation from the purge air generator 23 in this case and the amount of charge removal in the static eliminator 20 are also controlled to appropriate conditions by the microcomputer type control device 17 provided with the above-mentioned microcomputer.

Third Embodiment of the Invention of the Application
Next, FIG. 11 and FIG. 12 are premised on the configuration of the vibrating fluidized bed type separation apparatus of powder according to the first embodiment for carrying out the above-mentioned application, and in the same apparatus, the upper part of the separated separation container For providing the overflow type unburned coal discharge port 1C for discharging the unburned coal of the present invention, and improving the discharge efficiency from the overflow type unburned coal discharge port 1C. The structure of the vibrating fluidized-bed-type separator of the powder which concerns on a form is shown.

  As described above, according to the vibrating fluidized bed separator for powder of the first embodiment for carrying out the invention of this application, the upper portion of the cylindrical separation container 1 containing unseparated coal ash C is used. Unburned coal C2 separated from the burned coal ash C1 is gradually stacked. Therefore, continuous separation can not be performed unless the unburned carbon C2 is sequentially discharged and recovered.

  Therefore, in the configuration of the third embodiment, an overflow-type unburned coal discharge port 1C for discharging unburned coal C2 is first formed in a part of the side wall portion on the upper end side of the separation container 1, and the unburned coal discharge port is formed. A duct 24 for discharging unburned coal having an unburned coal discharge passage 24a directed downward at the outside of 1C is provided, and gravity and vibration of the unburned carbon C2 accumulated in the upper layer with progress of the separation action are Configure to use and discharge.

  However, in the case of the unburned carbon C2, although it has fluidity to some extent, its viscosity is also high compared to water etc., and gravity or vibration alone does not necessarily flow out efficiently from the upper layer portion in the separation container 1.

  Therefore, as shown in FIG. 11, a rotary scroll lever 25 which rotates in the horizontal direction with the internal vibrator 3 as a rotation center is provided in the separation container 1 and disposed at an interval of 180 degrees in the diameter direction. By rotating the discharge vanes 25a, 25a, the unburned coal C2 is smoothly swept out from the overflow-type unburned coal discharge port 1C to the unburned coal discharge path 24a side of the unburned coal discharge duct 24 for efficient discharge. It is like that.

  The discharge blades 25a, 25a of the sclever 25 are fixed to the outer periphery of a sleeve member 25b loosely fitted to the outer periphery of the internal vibrator 3, and a pulley 25c is provided on the upper end of the sleeve member 25b. The pulley 25 c is linked to a drive pulley 26 a of the sclever drive motor 26 via a predetermined belt member 27. And. By the drive of the same screever drive motor 26, the discharge vanes 25a, 25a are rotated to discharge the unburned coal C2 efficiently and continuously.

  For example, as shown in FIG. 12, the discharge vanes 25a, 25a have an upper and lower width corresponding to the thickness of the unburned carbon layer to be stacked, while forming an arc shape in plan view convex on the front side in the rotational direction. It can be effectively swept out in the centrifugal direction during rotation.

<Fourth Embodiment for Implementing the Invention of this Application>
Next, FIG. 13 and FIG. 14 are premised on the configuration of the vibrating fluidized bed type separation apparatus of powder according to the first embodiment for carrying out the invention of the above-mentioned application, and in the same apparatus, the separated container While providing an overflow type unburned coal discharge port 1C for discharging unburned coal in the upper layer, and further providing an overflow nozzle for blowing out unburned coal, the discharge efficiency of unburned carbon C2 from the overflow type unburned coal discharge port 1C 4 shows the configuration of a vibrating fluidized bed separator for powder according to a fourth embodiment of the present application, which is an improved version of the present invention.

  As described above, according to the vibrating fluidized bed separator for powder of the first aspect for carrying out the invention of this application, the upper layer portion of the cylindrical separation vessel 1 containing unseparated coal ash C. The unburned coal C2 separated from the burned coal ash C1 is gradually stacked on the Therefore, continuous separation can not be performed unless the unburned carbon C2 is sequentially discharged and recovered.

  Therefore, in the configuration of the fourth embodiment, an overflow-type unburned coal discharge port 1C for discharging unburned coal C2 is first formed in a part of the side wall portion on the upper end side of the separation container 1, and the unburned coal discharge port is formed. A duct 24 for discharging unburned coal having an unburned coal discharge passage 24a directed downward at the outside of 1C is provided, and gravity and vibration of the unburned carbon C2 accumulated in the upper layer with progress of the separation action are Configure to use and discharge.

  However, in the case of the unburned carbon C2, as mentioned above, although it has fluidity to some extent, its viscosity is also higher than water etc., and it is not necessarily from the upper layer inside the separation container 1 only by gravity or vibration. It does not necessarily flow out efficiently.

  Therefore, in the configuration of the fourth embodiment, as shown in FIGS. 13 and 14, the unburned coal C2 to be stacked is separated from the circumferential direction in the separation container 1 into the discharge port 1C direction in the separation container 1. An arrangement is provided in which an overflow nozzle 26 is provided to blow out the unburned carbon C2 smoothly from the discharge port 1C by the air blown out from the overflow nozzle 26.

  That is, in the configuration of the fifth embodiment, as shown, for example, in FIGS. 13 and 14, it is positioned horizontally on the outer peripheral portion (upper surface of the laminated portion of unburned carbon C2) of the internal vibrator 3 at the upper end of the separation container 1 A plurality of (four) air pipes 26a, 26a, 26a, 26a having a plurality of (four) air nozzles for blowing air slightly downward from the direction are provided radially at 90 ° intervals, and the air pipes 26a, 26a are provided. Pushing air of a predetermined pressure is supplied from the pushing air generating device 27 such as a blower via the pushing air supply line 28, and a predetermined flow velocity is obtained from a plurality of air nozzle portions in the axial direction of the air pipes 26a, 26a, 26a, 26a. By blowing out an amount of air in the direction of the unburned coal discharge port 1C, the unburned coal C2 is discharged smoothly and efficiently.

<Fifth Embodiment for Implementing the Invention of this Application>
Next, FIG. 15 and FIG. 16 are premised on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the invention of the above-mentioned application, in the same device, the unburned coal separated in the above. The fifth embodiment of the invention of this application is provided with an unburned coal outlet and an unburned coal outlet duct for overflowing by gravity, and the discharge efficiency from the unburned coal outlet and the unburned coal outlet duct is improved. The structure of the vibration isolation apparatus which concerns on these is shown.

  As described above, according to the vibration separation device having the configuration of the first aspect, the unburned coal C2 separated is gradually stacked on the upper layer portion of the cylindrical separation container 1 containing the unseparated coal ash C. . Therefore, it is necessary to sequentially discharge and recover this unburned coal C2.

  For this reason, also in the configuration of the fifth embodiment, the opening portion 1C for discharging unburned coal is formed in a part of the side wall portion of the upper end of the cylindrical separation container 1 as in the third and fourth embodiments. And an unburned coal discharge duct 29 having a unburned coal discharge passage 29a directed downward with respect to the opening 1C, and the unburned coal C2 accumulated in the upper layer portion along with the progress of the separation action is gravity and It can be considered that discharge is performed by utilizing the flow action in the circumferential direction due to vibration, but the unburned carbon C2 in the upper part in the separation container 1 is considered to be provided only by providing the opening 1C and the unburned coal discharge duct 29. It is not always discharged efficiently.

  So, in this 5th form, as shown, for example to FIG. 15 and FIG. 16, in the circumferential direction of the coal ash C by the said beat vibration from the opening part part of the said separation container 1 to the inner side internal vibrator 3 vicinity. Of the unburned coal C2 is scooped at the time of rotational movement, and the unburned carbon C2 scooped by the scoop member 30 is lowered to the unburned coal discharge path 29a of the duct 29 for discharging unburned coal. It discharges by gravity using the inclined surface 30a.

  According to such a configuration, it is a simple configuration only by providing the wedge member 30 having a U-shaped cross section, and the effective unburned coal C2 utilizing rotational movement (flow) and gravity of the coal ash C in the circumferential direction by beat vibration. Can be discharged.

<Sixth Embodiment for Implementing the Powder Separation Method of the Invention of this Application>
Next, FIG. 17 is premised on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of the application, in which the external vibrator is used. The vibration separator according to the sixth embodiment for carrying out the powder separation method of the invention of the present application, wherein the side wall of the separation container is provided with a coal ash charging port for which unburned coal is not separated. It shows the configuration.

  In the case of the configuration of the vibration separation device having the configuration of the first embodiment, as a method of charging the coal ash C for unburned coal separation into the coal ash storage space 1A of the separation container 1, for example, a cylindrical separation container 1 Method of utilizing the upper end side opening portion, a method of utilizing the cylindrical internal vibrating body 3 as an input duct, providing a supply port at the lower portion thereof, and introducing the same, opening for introduction into the side wall portion of the separation container 1 and Various feeding methods such as a method of providing a duct of

  However, since the separated unburned carbon C2 is stacked in the upper end side opening portion of the separation container 1, it is difficult to introduce new unseparated coal ash C from the same portion.

  So, in this 6th form, while providing the opening 30a for coal ash introduction which is not separated in the side wall part middle part of the above-mentioned separation container 1, coal ash which is not separated is inserted into the opening 30a for coal ash introduction. A duct 30 is provided, the upper end portion thereof is a hopper portion 30b, and the coal ash loading device 31 is made to correspond to the hopper portion 30b so as to introduce unseparated coal ash C. All other configurations are similar to those of the first embodiment, and operate in the same manner.

  In such a configuration, since the opening 30a for introducing coal ash and the duct 30 for charging coal ash are integrated with the separation tank 1 which is the external vibrator, the coal ash introduced from the hopper portion 30b When the air passes through the duct portion 30, it is subjected to vibration immediately, and is supplied into the separation tank 1 while producing a dispersing and separating action. Therefore, the efficiency of dispersion and separation becomes high.

<Seventh Embodiment for Carrying Out the Powder Separation Method of the Invention of this Application>
Next, FIG. 18 is premised on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of the above-mentioned application, in which According to a seventh form for carrying out the powder separation method of the invention of this application, in which unburned coal is charged with coal ash in an unseparated state using a cylindrical internal vibrator that beats and vibrates. Fig. 2 shows a configuration of a vibrating fluidized bed type vibration separator of such powder.

  That is, in the configuration of the seventh embodiment, for example, as shown in FIG. 18, the cylindrical internal vibrator 3 is positioned at the center of the coal ash storage space 1A of the separation container 1 and vibrates itself. A hopper portion is formed on the upper end portion 3c side for charging the coal ash C in a state in which unburned coal C2 is not separated, and the unburned coal charged from the hopper portion on the outer periphery of the lower end portion 3d of the internal vibrator 3 Coal ash inlets 3e, 3e,... Are provided to introduce coal ash C in a state where C2 is not separated radially outward. Further, a coal ash loading device 31 similar to that of the sixth embodiment is made to correspond to the upper end 3c side hopper portion of the internal vibrating body 3.

  The coal ash inlets 3e, 3e · · · on the lower end 3d side of the internal vibrator 3 are further located as a bottom member inside the cylindrical portion of the internal vibrator 3 and coaxially convex upward A conical cover 3f is provided, and predetermined fluidizing air outlets 3g, 3g,... Are provided in the circumferential direction on the tapered surface portion of the conical cover 3f. Fluidization air is blown out obliquely upward from the ports 3g, 3g... (See arrows).

  For this reason, according to the configuration of the seventh embodiment, combined with effective vibration of the cylindrical internal vibrator 3 itself which is a coal ash charging duct, fluidization from the lower side to the same portion is effectively performed. The air is supplied, and unseparated coal ash C supplied into the separation container 1 is supplied into the separation container 1 while being effectively dispersed and fluidized in the internal vibrator 3, While it becomes difficult to produce an ash clogging more than the structure of a form of 6, dispersion | distribution of the calcinated coal ash C1 and the unburned carbon C2 and separation efficiency become high.

<Eighth Embodiment for Implementing the Powder Separation Method of the Invention of this Application>
Next, FIG. 19 is based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of the above-mentioned application, in which the air lift type is used. The configuration of a vibrating fluidized-bed separator for powder according to an eighth embodiment for carrying out the method for separating powder of the invention of this application is shown, which discharges burned coal ash after separation of unburned coal. ing.

  The burnt coal ash C1 separated from the unburned coal C2 as described above can be relatively easily drained by weight if an outlet and a discharge valve are provided at the bottom of the coal ash storage space 1A of the separation container 1 it can. However, when the apparatus is operated and discharged, the burned coal ash C1 is in a fluidized state, so that there is a problem that the flow velocity is high and the valve of the discharge valve wears quickly.

  So, in this 8th form, as shown, for example in FIG. 19, T-type aeration nozzle insertion of predetermined length is inserted in the exterior of the burned coal ash discharge port 1h provided in the lower part of the side wall part of the separation container 1. The duct 40 is connected to insert and install the aeration nozzle 37 having a sufficient length, and fluidization air from the second fluidizing air generation device 14B via the fluidization air supply line 18b to the aeration nozzle 37 Are configured to be able to supply

  In this case, a filter regulator 35 and an air flow control valve 36 are provided in the middle of the fluidizing air supply line 18b, and the flow rate of air supplied by the microcomputer type controller 17 similar to that described above is It is supposed to be properly adjusted.

  By the way, as described above, the aeration nozzle insertion duct 40 has a T-shaped structure as a whole, and one end side opening in the axial direction is directed to the discharge port 1h of the burned coal ash C1 in the lower part of the separation container 1 While connected, the aeration nozzle 37 is attached to the opening on the other end side. In addition, as shown in the drawing, the air suction in the coaxial state of the burned coal ash discharge duct 42 having a Y-shaped structure as a whole via the flexible hose 41 with a coil bone as shown in the drawing. It is connected to the lower end side opening of side duct 42a.

  On the other hand, the upper end side opening portion of the air suction side duct 42a of the burned coal ash discharge duct 42 is connected to the air suction device 44 of the blower structure via the connecting member 42c and the air pipe 43, The opening is connected to the upper end side opening of the burned coal flow lower duct 42b branched downward, and the upper end side opening of the air suction side duct 42a and the burned coal lower flow duct 42b. A communication space which is branched from the upper end side opening forms a separation space in which air is sucked upward and the burned coal ash C1 flows downward.

  In such a configuration, the burned coal ash C1 separated from the unburned carbon C2 and discharged from the lower side of the separation container 1 into the aeration space 40a of the aeration nozzle insertion duct 40 is the fluidization as described above. The amount of fluidization air which is efficiently fluidized by an appropriate amount of fluidization air supplied from the air generator 14B and supplied from the fluidization air generator 14B and the amount of coal ash C in the separation container 1 The inside of the flexible hose 41 is easily blown up and raised as shown in the figure by the outflow pressure according to the (head), and a stable air lifting state is achieved, and the above-mentioned dispersal supplied to the inside of the aeration nozzle insertion duct 40 The air suction side duct 42a for sucking the fluidization air from the air nozzle 37 and the separated space portion between the burned coal lower flow duct 42b for letting the burned coal ash C1 flow down to the outside In will be continuously supplied.

  Then, in the separated space portion supplied in the same manner, the fluidizing air component rising toward the upper side connecting member 42c by the air suction device 44 is sucked and smoothly discharged, while the gravity causes the side The burned coal ash C1 is allowed to smoothly flow down to the burned coal downflow duct 42b side.

  Moreover, in the configuration of this embodiment, the smooth air lifting action itself generated as described above substantially exerts the valve body function, and the valve body which wears as in the prior art becomes unnecessary, as described above. Problems such as valve wear and ash leaks are reliably eliminated and extremely durable.

  At the same time, since the discharge amount of the burned coal ash C1 can be easily adjusted basically by adjusting the amount of fluidizing air supplied to the aeration nozzle 37, the adjustment of the discharge amount is also easy.

  The fluidization air generator 14B for supplying the fluidizing air to the aeration nozzle 37 is stopped except during the discharge of the burned coal ash C1, whereby the burned coal downflow duct 42b is sealed with a material. do it.

  In FIG. 19, a fluidizing air generator for supplying fluidizing air to the fluidizing air supply space 1B at the bottom of the separation container 1 is indicated by 14A, and a symbol of a fluidizing air supply line from the same is indicated by 18a. This corresponds to the reference numerals 14 and 18 of the configuration of FIG. 9 described above.

<Ninth embodiment for carrying out the powder separation method of the invention of this application>
Next, FIG. 20 is based on the configuration of the vibrating fluidized bed type separator for powder according to the first embodiment for carrying out the powder separation method of the invention of this application, and the vibrating fluidized bed type of the same configuration is premised. The powder separation method according to the invention of this application is a vibration fluid bed separation system of powder with higher separation accuracy for both unburned coal C2 and burned coal ash C1 by using a plurality of separation devices. The structure of the vibrating fluidized-bed-type separator of the powder which concerns on the 9th form for implementing is shown.

  The vibrating fluidized bed type separation apparatus according to the above-mentioned first embodiment has a separation performance enough to be practically used even with one unit. However, even if that is the case, depending on the application, there may be a case where as high separation accuracy is required as possible. In addition, if a large amount of processing is assumed, it is possible to perform separation more efficiently by operating one unit for a long time by combining a plurality of separation devices in a plurality of stages and sequentially separating in a plurality of stages, Ability can be improved.

  This ninth embodiment is configured from such a point of view, and as shown in FIG. 20, for example, a vibrating fluidized bed type separator having the configuration of the first embodiment described above (however, charging of coal ash C is performed. As the method, the first to third three vibration isolation devices A1 to A3 are adopted as shown in FIG. 20, for example. The unburned carbon C2 separated from the burned coal ash C1 in the first vibrating fluidized bed type separator A1 is again supplied to the second vibrating fluidized bed type separator A2 to burn the burned coal ash C1 and the unburned carbon C2 The first system to be separated, the burned coal ash C1 separated from the unburned carbon C2 by the first oscillating fluidized bed type separation apparatus A1 is again supplied to the third oscillating fluidized bed type separation apparatus A3 to produce the unburned carbon C2 Two-stage system with the second system to separate into coal and burned coal ash C1 Form, improves the unburned C2 and burnt coal ash C1 each separation accuracy, separation efficiency is characterized in that up the separation performance.

  That is, in this system, first, coal ash C containing unburned coal C2 generated in the boiler facility 60A such as a coal thermal power plant and stored in the storage tank 61 is the first vibrating fluidized bed type of the first stage. It is charged from the internal vibrator 3 of the separation device A1 and is first separated into unburned coal C2 and burned coal ash C1. Next, the unburned carbon C2 separated by the first vibrating fluidized bed separator A1 in the first stage is introduced from the internal vibrator 3 of the second vibrating fluidized bed separator A2 in the second stage. , Again separated into burned coal ash C1 and unburned coal C2. As a result, the coal ash C1 is removed with higher accuracy from the unburned coal C2 still containing a certain amount of burned coal ash C1 separated and collected primarily, and the higher purity unburned coal C2 is obtained. Is recovered. The high purity unburned coal C2 is supplied and stored in the unburned coal storage tank 62, and is introduced into the fuel supply line provided with the blower 48 for unburned coal supply through the fuel introducing unit 49 as needed. It is supplied to the boiler installation 60B.

  In addition, high purity burned coal ash C1 separated by the second vibrating fluidized bed type separator A2 in the second stage is stored in a predetermined storage tank 63 as a raw material such as fly ash cement, for example. Eventually, it is loaded into the storage portion 50a of the transport means 50 such as a truck and transported.

  On the other hand, the burned coal ash C1 separated by the first vibrating fluidized bed separator A1 in the first stage is obtained from the internal vibrator 3 of the third vibrating fluidized bed separator A3 in the second stage. The unburned carbon C2 is separated with higher accuracy by being introduced. Then, the high purity unburned coal C2 separated in the same manner is supplied and stored in the above-described unburned coal storage tank 62, and thereafter, is supplied to the boiler facility 60B via the fuel introduction unit 49 as described above. Also, the high purity burnt coal ash C1 from the second vibrating fluidized bed separator A3 in which the unburned carbon C2 has been separated and removed with high accuracy in such a manner is the second vibrational flow described above. Similar to the burned coal ash C1 from the layer type separation device A2, it is stored in a predetermined transport storage tank 63 as a raw material for the fly ash cement and the like.

  According to such a configuration, efficient separation performance can be realized and coped with the case where as high separation accuracy as described above is required or when a large amount of processing is required. Processing capacity can be improved.

  1 is a separation container, 1A is a coal ash storage space, 1B is a fluidizing air introduction space, 2a to 2h are first vibration generators, 3 is an internal vibrator, 4a and 4b are second vibration generators, 5 is 11 is a powder temperature detecting means, 12 is a fluidized bed viscosity detecting means, 13 is a fluidized bed pressure detecting means, 14 is a fluidized air generating device, 15 is a temperature heater, and 17 is a control device.

Claims (3)

  The powder having different density difference is accommodated in the separation container, and the vibration source is used to give vibration to the powder in the separation container, and the fluidizing gas is supplied into the separation container to thereby A method of separating powder, wherein fluidization bubbles are generated in the powder, wherein a plurality of excitation sources having different frequencies are adopted as the excitation source, and a plurality of excitations having different frequencies are provided. Vibration is generated in the separation container by the source, and vibration and impact action is given to the powder having different density difference in the separation container by the vibration to make the adhesion between the powder having the different density difference. By making the bubbles of the fluidizing gas supplied into the separation vessel fine, thereby fluidizing the powder in the separation vessel without increasing the inflow velocity, thereby making the powder Adhesion between powders with different density differences in the body Effectively reduced by increasing the effect of dispersing the powder, the method of separating the powder, characterized in that to improve the separation efficiency.   The plurality of excitation sources having different frequencies are composed of a plurality of sets of excitation sources having different frequencies, and the plurality of excitation sources having different frequencies have predetermined intervals on the outer peripheral side of the separation container. The method for separating powder according to claim 1, wherein the powder is separated by A plurality of excitation sources having different frequencies are provided outside the separation container to cause the separation container to vibrate, and above the separation container to cause the vibration body inside the separation container to vibrate. the method of separating the powder of claim 1, wherein a and said Rukoto from source.

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