JP4493384B2 - Method and apparatus for detecting deposit level of charge in high temperature vertical reactor - Google Patents

Description

  The present invention relates to a method and an apparatus for stably detecting an accumulation level of a charge charged in a high-temperature vertical reactor with excellent accuracy.

  Conventionally, in a high-temperature vertical reactor including a gasification melting furnace, various means have been taken in order to detect the accumulation level of charges such as waste charged in the furnace. Each means will be described below.

  As for the contact type detection method, for example, in Patent Document 1, as shown in FIG. 1, in a shaft furnace type waste melting furnace 1, a deposit level (stock level) detector 1e and the inside of the furnace A stock of waste melting furnace characterized in that the stock level is increased or decreased using a vent pressure differential pressure gauge PT for detecting a draft differential pressure so that the vent pressure difference in the furnace becomes a preset target value. A level control method is disclosed. However, the use of such a contact type waste accumulation level detection method is from the viewpoint of preventing thermal shock and thermal damage at the accumulation level detection end due to the high temperature atmosphere in the furnace, and external leakage of the furnace atmosphere. Then, it is not suitable.

Specifically, the non-contact detection method includes four types, that is, a method using sound waves, a method using light, a method using radiation (gamma rays or the like), and a method using electric (magnetic) waves.
Among these, the sound wave is not suitable because it depends on temperature and is highly reflected by dust. Moreover, light is not suitable because it does not transmit dust. Furthermore, radiation is not suitable because of its complicated handling including laws and regulations. On the other hand, with regard to electromagnetic waves, it is easy to divert a commercially available technology and the signal has linearity.
As described above, in a high temperature waste treatment furnace, as a method for detecting the accumulation level of waste charged in the furnace, a non-contact method using an electric (magnetic) wave can be suitably applied.

  Next, the waste accumulation level detection means using the above-mentioned electric (magnetic) wave, specifically microwave non-contact method, waste heat treatment furnace, specifically stoker waste incinerator and waste Various evaluations for the case of application to a gasification melting furnace are described. As for the waste gasification melting furnace, specifically, the NKK gasification melting furnace and the waste in the furnace in which the ambient temperature in the vicinity of the installation level of the waste accumulation level detection means in the furnace is relatively low. The case of applying to the Kawatetsu Thermo Select Gasification Melting Furnace where the ambient temperature in the vicinity of the installation level of the deposition level detection means is high will be described.

  In a stoker-type waste incinerator, a non-contact type waste accumulation level detection method using microwaves has already been put into practical use. In the furnace, the waste is disposed of about 500 to 1300 mm on the grate. The furnace temperature in the furnace is a relatively low temperature range of approximately 800 ° C. to 900 ° C., and the amount of combustion air fed from the grate is also premised on a low air ratio. The level is generally low. Further, since the furnace is in a relatively low temperature region as described above, no molten slag is generated, and there is no need to consider the influence thereof. In such a situation, when the transmission / reception separate type microwave dust layer thickness measuring device is applied, for example, even a weak signal of 10 mW can be easily compared by comparing the attenuation amount with a preset threshold value. Moreover, it can be determined that the dust layer height has reached a predetermined level with high accuracy.

  Next, with respect to the NKK type gasification melting furnace, as shown in FIG. 2, Patent Document 2 has an inlet 2 for waste and carbon-based auxiliary fuel at the top of the furnace body 1, and the furnace body 1 side. A vertical furnace that has a tuyere that blows oxygen-containing gas into the part, pyrolyzes the charged waste to generate flammable gas, and melts ash and incombustibles in the waste; An upper tuyere 3 is provided at a level corresponding to a level above the upper surface of the deposited layer formed by the charged waste and the carbon-based auxiliary fuel, and a middle tuyere at a level corresponding to the upper part of the deposited layer. 4, a waste gasification and melting furnace is disclosed in which a lower tuyere 5 is provided at a level corresponding to the lower part of the deposited layer.

  Regarding the effect, in paragraph [0062] of Patent Document 2, the level corresponding to the upper surface of the deposited layer formed by the charge, the level corresponding to the upper part of the deposited layer, Since the upper tuyere 3, the middle tuyere 4 and the lower tuyere 5 are provided at the level corresponding to the lower part, the molten state such as ash in the lower part of the furnace body 1 is maintained in a good state. In addition, the flow of the deposited layer can be maintained in a good semi-fluid state, the gas temperature of the free board portion 1a can be maintained in a high temperature range of 1000 ° C. or higher, and stable operation can be continued. It is described.

  The point at which the waste accumulation level is detected in this furnace is presumed to be in the vicinity of the morning glory 1b in the furnace body 1. Since this region is directly connected to the free board 1a portion of the furnace, the ambient temperature is 1000 ° C. or less, which can be said to be a relatively low temperature region. In addition, in the furnace, the vicinity of the upper end position of the waste accumulation layer is considered to be an area where the waste accumulation layer moves in a semi-fluid state where the degree of waste scattering is relatively low and exhibits drying and thermal decomposition. Therefore, it is estimated that the dust accumulation level detector is hardly affected by the molten slag in this region.

  Next, with regard to the Kawatetsu Thermo Select Gasification Melting Furnace, Patent Document 3 discloses a structure-stable solid aggregate that is discharged from a heated channel in a dry, fragmentary form that does not contain readily volatile components. The body is immediately and directly introduced into the high temperature reactor to form a gas permeable solid bed from the solid mass assembly in the high temperature reactor, and the solid bed is exited from a heated channel And then forming a carbon-containing fluidized bed at the top of the solid bed in the high-temperature reactor, and by adding oxygen, the carbon component in the solid bed is oxidized to carbon dioxide gas. The carbon dioxide gas is converted into carbon monoxide when passing through the carbon-containing fluidized bed, and the metal component and the mineral component in the solid bed are melted at a temperature of 2000 ° C. or higher. Whether to withdraw from the high temperature reactor Methods for obtaining useful waste product comprising is disclosed.

In the Kawatetsu Thermo Select Gasification Melting Furnace, a method of transmitting / receiving microwaves from the top of the furnace and detecting the accumulation level of the waste in the furnace will be described.
As for such a detection method, for example, in Patent Document 4, as shown in FIG. 3, the upper part of the cylindrical body 38 of the layer high level measuring device 32 fixed to the opening 37 of the upper part of the waste melting furnace 31. A microwave transmitting / receiving device 33 for measuring the layer height level of the waste by the reflected wave 36 of the microwave 35 is provided, and a porous ceramic plate 34 for partitioning the cylindrical body 38 is provided below the cylindrical body 38, A cylindrical body 38 partitioned by the microwave transmitting / receiving device 33 and the porous ceramic plate 34 is provided with a purge gas pipe 39 for blowing an inert gas into the cylindrical body 38. A measuring device 32 is disclosed.

  However, in the technique disclosed in Patent Document 4, microwaves transmitted from the top of the furnace are diffused and diffusely reflected on the inner wall of the furnace or on the upper surface of the waste layer. Therefore, the received reflected waves have high accuracy in the waste melting furnace. It is estimated that it is very difficult to detect the deposition level.

Next, a method for horizontally transmitting and receiving the microwave in the vicinity of the upper surface of the waste layer in the waste melting furnace to detect the waste accumulation level will be described.
This detection method is disclosed, for example, in Japanese Patent Application No. 2003-087422 filed by the applicant of the present application, which is shown in FIG. 4 and FIG. In the method for detecting the accumulation level of the compressed waste 47 charged into the high temperature reactor 46 from above, the refractory 61 is provided on the furnace wall below the charging port 55 of the high temperature reactor 46 and on the inner surface of the furnace. A single electromagnetic wave transmission device 57 in the water-cooling jacket 59a is used to transmit an electromagnetic wave such as microwaves or γ-rays. The electromagnetic wave is received by using one electromagnetic wave receiving device 58 in the water-cooled jacket 59b having the object 61, the attenuation amount of the electromagnetic wave is measured, the measured value of the attenuation amount and a preset threshold value, Compare the above The compressed waste 47 in the high temperature reaction furnace 46 when the measured value of 衰量 exceeds the threshold value is a charging deposition level detection method to be determined to have reached a predetermined level. FIG. 5 is a detailed view of the vicinity of the electromagnetic wave transmission device 17, 60 is an antenna, and an end portion thereof is inserted into a through hole 63 provided in the refractory 61. The inside of the water cooling jacket 59a is purged with an inert gas such as N ₂ gas to prevent intrusion of dust and gas.

  However, comparing the reliability of the above-mentioned apparatus using microwaves with the results obtained by testing using an apparatus using γ rays instead of microwaves, the correlation between microwaves and γ rays agrees. Therefore, it was found that the reliability of the detection value itself of the microwave waste accumulation level was not ensured.

The following can be considered as the probable cause that the reliability of the detected value of the microwave waste accumulation level cannot be secured.
(1) Effects of flames ejected from the top of the reactor waste accumulation layer and generating electromagnetic waves
(2) Effect of dust in the space near the furnace where the waste accumulation level detector is installed
(3) Influence of diffuse reflection component in microwave oven
(4) Microwave attenuation problem due to slag adhering to the heat insulation brick of the level detector

The inventors of the present invention have found that the greatest reason why the reliability of the detection value of the waste accumulation level by microwaves cannot be ensured is that the microwaves are attenuated by the slag adhering to the heat-blocking bricks of the level detection device. I found out that That is, the low-boiling point metal contained in the waste in the form of metal oxide is provided on the furnace inner surface of the heat-blocking brick that protects the microwave transmitter and the microwave receiver from the high-temperature atmosphere in the high-temperature reactor. It has been found that molten slag containing about 25 to 35% of lead and zinc and further containing a metal component in the waste adheres, and this attached slag is a major factor that attenuates the microwave.
In order to solve the above problems, the present inventors have provided a waveguide 82 as shown in FIG. 6 so as to be able to advance and retreat, and project the tip of the waveguide 82 from the microwave inlet during operation. A method was proposed to prevent the slag from sticking in front of the furnace inlet of the microwave inlet by mechanically pushing the wave inlet. However, this method has a drawback that the structure of the apparatus is complicated and the cost is increased.

JP-A-8-285246 Japanese Patent Laid-Open No. 9-60830 Japanese Patent No. 2729124 JP 2000-304233 A

The present invention is to solve the above problems, i.e., excellent heat resistance, and preventing a decrease in the transmit / receive function by molten slag deposition, also the accuracy at very high ambient region of the dust content It can be maintained, and the signal is reliable, there is no false signal, and the accumulation level of waste charged in the high-temperature reactor of the gasification and melting equipment is detected with excellent accuracy and stable over a long period of time. It is to provide a possible method.

(1) An electromagnetic wave transmitter and receiver are installed on the side wall of the high-temperature vertical reactor, and the presence or absence of a charge is determined from the intensity of the electromagnetic wave signal transmitted through the furnace. An apparatus for detecting the accumulation level of an object, provided with an electromagnetic wave waveguide also serving as a burner gas introduction pipe on the side wall of the furnace body ,
An electromagnetic wave transmitter and receiver are connected to the waveguide ;
While transmitting and receiving electromagnetic waves through the waveguide,
An apparatus for detecting the accumulation level of a charge, wherein a burner gas is introduced through the waveguide to form a burner flame.
(2) The charge level detector for a charge according to (1) above, wherein the electromagnetic wave is a microwave having a frequency of 8 to 30 GHz.
(3) The apparatus for detecting the accumulation level of charges according to the above (1) and (2), wherein the high-temperature vertical reactor is a waste gasification melting furnace or a gasification melting reforming furnace.
(4) The deposit level detector for charged materials according to (1) to (3) above, wherein the transmitter and the receiver are arranged to face the furnace side wall.
(5) The charge accumulation level detection device according to any one of (1) to (3) above, wherein a transmitter / receiver in which a transmitter and a receiver are integrated is used as the transmitter and receiver.

(6) the electromagnetic wave between the Banagasu inlet and an electromagnetic wave transmitter or receiver of the waveguide to transmit but to insert a plug having a function of blocking the gas, transmitter or receiver burner gas electromagnetic The apparatus (1) to (5) according to any one of the above items (1) to (5), wherein the accumulation level detection device is prevented from entering the vessel.
( 7 ) Accumulation of charge to determine the presence or absence of charge from the intensity of the electromagnetic wave signal transmitted through the furnace by installing an electromagnetic wave transmitter and receiver on the side wall of the high-temperature vertical reactor This level detection method introduces burner gas to form a burner flame through an electromagnetic wave waveguide that also serves as a burner gas introduction pipe provided on the furnace side wall, and transmits and receives electromagnetic waves through the electromagnetic wave waveguide. deposition level detecting method of charge, characterized in that the Hare.

  According to the present invention, it is possible to stably detect the accumulation level of a charge such as waste charged in a high-temperature vertical reactor with excellent accuracy and for a long period of time.

As described above, in the conventional method, a dedicated waveguide for introducing microwaves is provided, purge gas is allowed to flow inside the dedicated waveguide, purge gas is blown from the tip of the dedicated waveguide, and melted by the gas jet pressure. Although it is intended to prevent adhesion of materials (slag, metal), it has been found that in this method, the melt is cooled by the purge gas, grows, and clogging occurs, resulting in less clogging prevention effects. . That is, the flow of the purge gas is disturbed by fluctuations in the furnace pressure or the purge gas pressure, the melt is entrained and penetrates into the waveguide, is cooled, and the melt penetrates into the waveguide and grows. It was found that obstruction occurred in about a week.
In addition, the purge gas is insufficiently cooled in the purge gas, and the waveguide provided in the initial state protruding from the refractory is exposed to the high temperature environment in the furnace, so that its end face becomes the same as or slightly shorter than the refractory surface. The melt flowing on the wall surface is likely to enter the dedicated waveguide.

  Therefore, in the present invention, without providing a dedicated waveguide as a waveguide for microwaves, the burner gas introduction tube of the burner is also used as a microwave waveguide, and the burner gas introduction tube (= microwave In addition to utilizing the blowout pressure of the burner gas through the wave waveguide), the use of a burner flame prevents contamination and accumulation of foreign matter in the waveguide.

  The case where the deposition level detection method for a high-temperature vertical reactor according to the present invention is applied to the waste gasification and melting facility shown in FIG. 4 will be described as an example.

First, an outline of the waste gasification and melting facility shown in FIG. 4 will be described.
The compression support plate 4 is lowered, waste is introduced into the compression device 42 from the insertion port 41, the press 43 is moved in the direction of the compression support plate 44, and the waste is compressed and formed into a predetermined shape. Next, the compression support plate 44 is raised, and the compressed waste 47 is pushed into the heating furnace 45 by the press 43.
Next, after the press 43 is returned and the compression support plate 44 is lowered, the waste is introduced into the compression device 42 from the insertion port 41 to form the compressed waste 47, and the compression support plate 44 is raised to press the press 43. Is used to push the compressed waste 47 into the heating furnace 45.
By repeating the above operation, the compressed waste 47 sequentially moves from the insertion port of the heating furnace 45 to the discharge port.

A heating pipe 48 is disposed on the furnace wall of the heating furnace 45, and the inside of the heating furnace 45 is heated to about 600 ° C. by the high temperature gas flowing in the heating pipe 48. This high-temperature gas is obtained by burning a fuel such as LNG gas in the high-temperature gas generator 50 to raise the temperature of the gas serving as a heat medium, and between the high-temperature gas generator 50 and the heating pipe 48 of the heating furnace 45. Circulate.
Thus, while the compressed waste 47 moves in the heating furnace 45, the surface of the compressed waste 47 is carbonized, and the waste having a low melting point is melted. As a result, the compressed waste 47 can be prevented from collapsing, and the generation of dust can be suppressed.

The compressed waste 47 whose surface is carbonized in the heating furnace 45 is charged into the high temperature reactor 46 through the high temperature reactor inlet 55. An oxygen-containing gas supply pipe 51 is disposed at the lower part of the high temperature reactor 46 to supply oxygen gas into the high temperature reactor 46. Resins in the compressed waste 47 are combusted by this oxygen gas, and the inside of the high temperature reactor 46 is maintained at 1000 ° C. or higher. The lower temperature in the high temperature reactor 46 may rise to about 1600 ° C. Since the gas generated by the combustion of the resin contains CO and H ₂ , the gas generated in the purifier is cooled by the purifier 53 after being fed from the high temperature reactor 46 to the cooling device 52 and cooled. Purify and collect. The purified gas recovered in this way is used as fuel for various facilities.

In addition, since the combustion temperature in the high temperature reactor 46 is a high temperature of 1000 ° C. or higher, harmful substances such as dioxins generated by the combustion of resins are decomposed, and no harmful substances are included in the recovered purified gas.
On the other hand, the metal or ash in the compressed waste 47 is deposited in the lower part of the high temperature reactor 46 and further melted in a melting and holding furnace 54 having a burner 49 to be recovered as molten metal or molten slag.

Next, the microwave deposition level detection apparatus of the present invention will be described.
FIG. 7 shows a conceptual diagram of an example of the apparatus of the present invention, and FIG. 8 shows the apparatus shown in FIG. 7 in more detail.

The apparatus of the present invention will be described with reference to FIG.
A pair of combustion burner and microwave waveguides are provided through the furnace wall made of heat shielding bricks. A pair of the microwave transmission device and the microwave reception device is disposed opposite to each other on the furnace wall below the high-temperature reactor furnace inlet. In the figure, the case where the microwave is transmitted horizontally is shown, but the microwave does not necessarily need to be transmitted horizontally, depending on the setting of the accumulation level of the charge to be detected and the restrictions on the equipment. You only have to set it. However, in order to shorten the transmission distance of the microwave and improve the detection accuracy, it is preferable to transmit the microwave horizontally.

The combustion burner preferably has a multi-tube structure as shown in the figure, and the inner tube of the multi-tube is used as a fuel gas introduction tube / microwave waveguide, and the outer tube is used as an introduction tube for air or oxygen. In addition, the outer tube has a structure that can be cooled by cooling water. Then, connect the microwave oscillator or a microwave receiver downstream of the inner tube of a combustion burner.
By adopting the configuration as described above, the burner flame can prevent the molten slag from entering and attaching to the waveguide tip (furnace inner wall side), and can prevent clogging of the tip. .

  In order to facilitate maintenance, the microwave transmitter and the microwave receiver may be provided so as to be movable back and forth as illustrated.

The frequency of the microwave is preferably 8 to 30 GHz. By using such a frequency, there is no influence on detection accuracy due to interference between the microwave and the flame plasma. That is, the burner flame is a plasma, and it is generally known that a plasma has a plasma frequency unique to its type and shields electromagnetic waves having a lower frequency. The electron density (ne) [cm ⁻³ ] of the burner flame plasma is about 10 ⁸ , and from this, the plasma frequency (fp) can be calculated by fp = 9 × 10 ³ × ne ^1/2 and is about 90 MHz. Become. On the other hand, when a microwave having a much higher frequency of 8 to 30 GHz is used, problems such as interruption by flame do not occur. As a result of experimentally confirming how much attenuation of the microwave intensity is caused by the flame using a microwave level meter, the microwave intensity is almost constant regardless of the presence or absence of the burner flame (although attenuation during burner ignition is not zero) It was found that can be secured.

  The gas seal mechanism provided in the waveguide shown in FIG. 8 is specifically a plug, and when introducing the burner gas, the microwave is transmitted between the burner gas inlet and the microwave transmitter or receiver, but the gas is transmitted. Has a blocking function. By providing this plug, burner gas can be prevented from entering the microwave transmitter or receiver, and explosion of the combustible gas in the transmitter and receiver can be prevented. As a material for the stopper, for example, a synthetic resin can be used.

  When introducing the burner gas into the waveguide, a large number of small holes are formed around the waveguide to ensure gas introduction and reduce the loss of microwaves. Microwave leakage occurs when there is an opening having a wavelength longer than the wavelength of the microwave. Therefore, in order to prevent loss due to the opening, it is necessary to make the opening sufficiently smaller than the wavelength of the microwave.

  The microwave transmitted from the microwave transmitter is received by the microwave receiver, and the attenuation of the microwave is measured. At this time, when the microwave transmitted from the microwave transmitter is received by the microwave receiver without passing through the compressed waste accumulated in the high temperature reactor, the amount of attenuation of the microwave is small. On the other hand, when the microwave passes through the compressed waste and is received by the microwave receiver, the attenuation amount of the microwave changes according to the transmission distance in the compressed waste.

  That is, the longer the distance that the microwave passes through the compressed waste, the greater the attenuation of the microwave. Therefore, a threshold value is set in advance, and the measured value of microwave attenuation is compared with the threshold value. When the measured attenuation value exceeds the threshold value, the compression waste in the high-temperature reactor is discarded. It is determined that the object has reached a predetermined deposition level.

  As described above, in the present invention, the measured value of the attenuation amount of the microwave is compared with the threshold value, so that the compression waste accumulation level can be increased by only using a pair of the microwave transmission device and the microwave reception device. Can be detected.

  The above-described example is a penetration type that receives a microwave transmitted from a transmitter and penetrates the inside of the furnace with a receiver, but uses a reflection type transceiver that integrates the transmitter and the receiver, You may measure by providing this transmitter / receiver by providing only one measurement port in the furnace wall. The feed-through type has the advantage that the microwave path is short, so that the attenuation of the signal is small and it is difficult to receive noise, but it is necessary to provide two measurement ports. In addition, the reflective type requires only one measurement port, so there are fewer restrictions on the installation location than the penetration type, but the signal reciprocates in the furnace, so there are drawbacks of signal attenuation and noise. .

The detection device of the present invention is effective when applied to a waste gasification melting furnace or gasification melting reforming furnace to which molten slag easily adheres. Further, when the detection device of the present invention is applied to a waste gasification melting furnace or a gasification melting reforming furnace, even if the fuel gas flow rate from the multiple pipe is not sufficient, if the oxygen gas flow rate is secured, Since oxygen reacts with the reformed gas (for example, CO: 30%, H ₂ : 30%, etc.) in the high-temperature reactor near the burner and burns, there is an advantage that an equivalent effect can be obtained.

A microwave transmission device and a microwave reception device were installed in the high-temperature reactor, and an actual machine experiment was performed with the frequency of the microwave transmission device being 10 GHz and the output being 1.5 kW.
Even after 180 days of operation, no deposit was formed on the tip of the waveguide.

  The charge accumulation level detection device of the present invention is capable of detecting the accumulation level of the charge charged in the high-temperature vertical reactor with excellent accuracy even in an atmosphere region where the dust content is very high. Therefore, the utility in a high temperature vertical waste processing furnace is high.

It is a figure which shows the example using the conventional contact-type deposition level detector. It is a figure which shows the example of the conventional gasification melting furnace. It is a figure which shows the example of the gasification melting furnace of a Kawatetsu thermo selection system. It is a figure which shows the example which provided the deposition level detection apparatus of the waste using a microwave or a gamma ray in the gasification melting furnace. It is the figure which showed the detail of the microwave transmission device in FIG. It is a figure which shows the apparatus which prevented the slag adhering in front of the furnace inner opening of a microwave introduction port by mechanically projecting the microwave introduction port at the tip of the microwave waveguide. It is a conceptual diagram which shows the structure of the deposition level detection apparatus of this invention. It is a figure which shows the detailed structure of the deposition level detection apparatus of this invention.

Explanation of symbols

<Figure 1>
DESCRIPTION OF SYMBOLS 1 Shaft furnace type waste melting furnace 1a Shaft part 1a Morning glory part 1b Hearth part 1c Drying completion level 1e Stock level 2 Lower tuyere 3 Upper tuyere

<Figures 2-6>
1 Furnace 2 Waste and carbon-based auxiliary fuel inlet 3 Upper tuyere 4 Middle tuyere 5 Lower tuyere 6 Melt outlet 7 Combustion exhaust 8 Thermometer 9 Gas analyzer 10, DESCRIPTION OF SYMBOLS 11 Heat exchanger 17 Flow control valve of air supplied to upper tuyere 19 Flow control valve of oxygen supplied to upper tuyere 20 Flow control valve of air supplied to middle tuyere 21 Supply to lower tuyere Flow control valve for air 23 Flow control valve for oxygen supplied to the lower tuyere 31 Shaft furnace-type pyrolysis melting furnace 32 Layer high level measurement device 33 Microwave transmitter / receiver 34 Porous ceramic plate 35 Microwave 36 Reflected wave 37 Opening 38 Tubular body 39 Purge gas piping 40 Shut-off valve 41 Input port 42 Compressor 43 Press 44 Compression support plate 45 Heating furnace 46 High temperature reactor 47 Compressed waste 48 Heating piping 49 Bar 50 High-temperature gas generator 51 Oxygen-containing gas supply pipe 52 Cooling device 53 Purification device 54 Melting and holding furnace 55 High-temperature reactor inlet 56 Microwave 57 Microwave transmitter 58 Microwave receiver 59a, 59b Water-cooled jacket 60 Antenna 61 Fireproof Object 62 Furnace wall 63 Through-hole 81 Microwave transmitter 82 Waveguide 83 Waveguide guide pipe 84 Water-cooled pipe 85 Gas seal mechanism 86 Ball valve 87 In-furnace brick 88 Iron skin 89 Heat-proof brick 90 Waveguide slag removal position 91 Measurement position

Claims (7)

Accumulation of charge by installing an electromagnetic wave transmitter and receiver on the furnace side wall of the high temperature vertical reactor and determining the presence or absence of the charge from the intensity of the electromagnetic wave signal transmitted through the furnace It is a level detection device, provided with an electromagnetic wave waveguide that also serves as a burner gas introduction tube on the furnace body side wall ,
An electromagnetic wave transmitter and receiver are connected to the waveguide ;
While transmitting and receiving electromagnetic waves through the waveguide,
An apparatus for detecting the accumulation level of a charge, wherein a burner gas is introduced through the waveguide to form a burner flame. 2. The charge level detector according to claim 1, wherein the electromagnetic wave is a microwave having a frequency of 8 to 30 GHz. 3. The charge accumulation level detection apparatus according to claim 1, wherein the high-temperature vertical reactor is a waste gasification melting furnace or a gasification melting reforming furnace. The charge level detector according to any one of claims 1 to 3, wherein the transmitter and the receiver are disposed so as to face the side wall of the furnace body. 4. The charge accumulation level detecting device according to claim 1, wherein a transmitter / receiver in which a transmitter and a receiver are integrated is used as the transmitter and the receiver. A plug having a function of transmitting gas but blocking gas is inserted between the burner gas inlet of the waveguide and the electromagnetic wave transmitter or receiver, and the burner gas is inserted into the electromagnetic wave transmitter or receiver. 6. The charge accumulation level detection apparatus according to claim 1, wherein the charge accumulation level is prevented. An electromagnetic wave transmitter and receiver are installed on the side wall of the high-temperature vertical reactor, and the charge level detection method is used to determine the presence or absence of the charge from the intensity of the electromagnetic wave signal transmitted through the furnace. a is, through electromagnetic waveguide which also serves as a burner gas inlet tube provided in the furnace body side wall, by introducing the burner gas together to form a burner flame, that intends electromagnetic rows originating and receiving through electromagnetic waveguide A method for detecting the accumulation level of a charge.

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