JP2000154914A - Apparatus and method for combusting haze - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve heating up to an operational temperature with a minimum amount of auxiliary fuel by providing oxidization portions at first and second re-combusting portions, respectively, and introducing oxygen-containing gas to the first and second re-combusting portions. SOLUTION: Combustion gas generated by combustion in a main chamber passes through two re-combusting tunnels 41, 42. The re-combusting tunnels 41, 42, respectively, have first re-combusting processes 51, 52 and second re- combusting processes 53, 54. Blowers 57, 58 send air to a first combusting process, and blowers 59, 60 send air to a second combusting process. The cross-sectional areas of the second re-combusting processes 53, 54 are, respectively, larger than the cross-sectional areas of the first re-combusting processes 51, 52 of the tunnels 41, 42. For this reason, the second re-combusting processes 53, 54 are capable of taking in air and receiving a large amount of gas generated by combustion of evaporated hydrocarbon in the tunnels 41, 42. After passing through the second re-combusting processes 53, 54, the gas is transferred to a subsequent treating portion 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] This application is a continuation-in-part of US Patent Application No. 659,849, filed October 9, 1984,
The application is further filed in U.S. Patent Application No. 362,853, filed March 29, 1982, now U.S. Patent No. 4,475,4.
No. 69 is a continuation application, which was filed in March 1981
U.S. Patent Application No. 248,054, filed on March 27, is a continuation-in-part of U.S. Patent No. 4,438,705.

[0002] John N. Basic Senior noted in March 2, 1984, both patents, entitled "Incinerator with Two Reburn Stages and, optionally, Heat Recovery."
U.S. Pat. Nos. 4,438,705 and 1985;
4, 516, 510, dated May 14, 2016, have shown incineration systems and methods that have significantly advanced garbage incineration. These patents disclose devices and methods for containing a variety of refuse of very different types, heat contents, and wetness levels, and for incinerating the refuse in an environmentally acceptable manner in one type of apparatus. ing. These disclosures are cited in the text to facilitate understanding of the present case.

[0003] The two basic patents provide a complete incineration system that burns refuse in bulk or in a hydrocarbon liquid. These patents also provide an apparatus and method for incinerating the hydrocarbon-containing fumes from their sources, and also achieve this result without substantial adverse effects on the environment.

[0004] Naturally, in systems as complex as those shown by Mr. Basic in the two patents, various components are taken into account creatively, which is an improvement that further improves the efficiency of the system. Led to development.
Thus, for example, U.S. Pat. No. 4,475,469, issued Oct. 9, 1984, related to the aforementioned two patents, moves the combustion waste from the main chamber inlet to the ash outlet under the influence of the impulse. An improved hearth has been disclosed. This pulsating hearth, developed by Basic, is an improvement over the main advantages shown in the two incinerator patents mentioned above.

[0005] Bentforholt's Australian Patent No. 317,401, Aug. 26, 1974, directs air to a reburn tunnel through a tube in the center of the tunnel itself. However, Forehort does not imply the use of tubes, other than introducing air into the tunnel. When air is further introduced through the hole in the tube,
The gas velocity component becomes "T" shaped. This makes the air resistant to the gas flow through the reburn tunnel.

Accordingly, the present invention is directed to an improved incineration system that is more efficient. At the same time, the system is very economical in that it can be heated to operating temperature with a minimum amount of auxiliary fuel before introducing the waste. In addition, overall, this development has made the incineration system more user-friendly.

[0007] Typically, fume combustion systems improve the environmental characteristics of the gaseous fluid exiting the output of a source. The source contains flammable hydrocarbons. The fume combustion system has a reburn unit, the inlet opening of which connects to the output of the fluid source and is in fluid communication therewith. The reburn unit also has an outlet opening for discharging combustion product gases therefrom. Furthermore, it has a burner, which is connected to the unit and burns fuel inside the reburn unit. This has the purpose of maintaining its temperature at a height that allows the combustible hydrocarbons to be completely burned. Oxidizing means is connected to the reburn unit for further burning. This component introduces an oxygen-containing gas into the reburn unit to support combustion.

[0008] One improvement of this type of fume burner divides the reburn unit itself into a first reburn section and a second reburn section. Basically, each of these parts is paired with the other, and one performs its function when one does not operate.

In order to be able to use two separate fuel sections, the inlet opening to the reburn section has first and second inlet ports which are connected to the output of the hydrocarbon source. And in fluid communication therewith. The first and second inlet openings open to the first and second reburn sections, respectively.

[0010] Similarly, the outlet opening also has first and second outlet passages. These are the outlets for the first and second reburn sections, respectively. Further, the burner and the oxidizing means each have a first and a second part. A first portion of these two components connects to a first reburn portion, and a second portion of these components connects to a second reburn portion. In each of the two reburn sections, the burner section and the oxidizing means serve to burn the fuel and introduce an oxygen-containing gas.

[0011] As a completely different improvement, the reburn unit, whether composed of two parts or not, has an exciter means, which is inside the reburn unit and is surrounded by the unit. Connect to it. This exciter means, at a minimum, effectively reduces the cross-sectional area through which the oxygen-containing gas must pass to reach the combustible hydrocarbons. In addition, it becomes a reflective surface, so that the heat flowing into or generated by the reburn unit reaches the gas molecules for more complete combustion.

In the reburn unit, most of the length of the exciter means extends from the inlet to the outlet of the reburn unit.
Does not touch the wall of the reburn unit. The exciter has the purpose of reducing the cross-sectional area in cross section with respect to the passage from the inlet opening to the outlet opening of the reburn unit.

[0013] In this configuration, the exciting means functions to introduce the oxygen-containing gas into the reburn unit. Thus, the exciter has a nozzle in fluid communication with the oxidizing mechanism,
It is arranged on the surface of the exciter. This nozzle directs air into the space between the inner surface of the reburn unit and the exciter, the direction being at a non-perpendicular angle to the direction of the passage from the inlet to the outlet of the exciter. By avoiding the "T" shape in this manner, the air entering the reburn unit through the nozzle will repel the turbulence of the gas but will not slow or shut off the flow of the gas.

However, the exciter does not need to introduce air or other oxygen-containing gas into the reburn unit to have important and useful functions. It need only be passively arranged in the reburn unit to reflect the heat generated therein or flowing into it. This keeps the gas at a high temperature, which results in effective and complete combustion. To accomplish this, the surface of the exciter means facing the interior of the reburn unit has a component of a heat and corrosion resistant material. This prevents the exciter from being damaged by temperature or being destroyed in the gas environment in which the reburner operates.

[0015] The exciter must not absorb heat from the reburner or move it into the interior. Rather, the exciter must have a relatively low thermal conductivity and reflect heat off its surface and transfer it to the combustion gases. As a normal limitation, the surface of the exciter unit facing the interior of the reburn unit has a heat conduction constant k of approximately

[0016]

Regardless of whether there are two reburn sections or exciters, the fume burner is more efficient when the input of gaseous fluid is low and the gas output is low. To this end, the fume burner has a choke device connected to the outlet opening in order to selectively reduce the cross-sectional area of the outlet opening. This keeps the gas in the reburn unit long enough to cause complete combustion, even with minimal input. This also means that if the unit is cold and you want to resume incineration, you can easily heat the unit before the fumes containing harmful components from the combustion of the waste flow in. It is. By this operation, the unburned emission of harmful substances into the atmosphere is avoided, since the unit has already reached its operating temperature quickly before the fumes enter, and thus no environmental pollution occurs. By reversing the operating procedure or returning the return opening of the return unit to its original full size, the system can operate normally.

The foregoing components form part of an integrated incineration system, rather than merely acting as a fume burner. In this case, in addition to the refurbished unit with the aforementioned improvements, the incineration system also has a main combustion chamber with an inlet for introducing solid litter. An outlet opening from the main combustion chamber discharges combustion product gases therefrom. The outlet opening from the main combustion chamber connects to the inlet opening of the reburn unit and is in fluid communication therewith.

In the fume combustion method using two reburn tunnels, the fume is sent directly from the output of the source to the inlet openings of the first and second reburn sections. In order to maintain the desired temperature, this method generally requires burning the fuel in these two reburn sections. An oxygen-containing gas must be introduced into the reburn portion to promote gas combustion. Finally, the combustion products in the reburn section are pumped out through the outlet opening.

In order to cause the combustion by the exciting means, two reburning parts are not required. Rather, the fumes from the output of the source are sent to the inlet opening of the reburn unit. In that case, the fumes flow around the exciter means in the reburn unit. The exciter is supported by and connected to the reburn unit.
From the inlet of the reburn unit to its outlet, most of the length of the exciter is not in contact with the wall of the reburn unit.

[0021] To maintain the proper temperature, the fuel is typically burned in a reburn unit. Thus, as described above, in order to burn hydrocarbons, an oxygen-containing gas must be flowed into the reburn unit. The oxygen-containing gas flows into the space between the inner surface of the reburn unit and the exciter at a non-perpendicular angle to the direction of gas flow in that space. Finally, the combustion product gas exits the reburn unit.

In another aspect, fume combustion proceeds within the reburn unit described above. The temperature therein is maintained at the desired level by the combustion of the fuel generated within the unit. When the oxygen-containing gas is introduced, fumes are burned as required. Maintaining the temperature in the unit at a desired level by selectively reducing the area of the outlet opening where the product gases exit from the reburn unit, by adding a small amount of fuel, or without refueling at all be able to.

In order to burn refuse in accordance with these developments described above, in addition to the fumes described above, the refuse must enter the main incinerator through an inlet opening. Then, the loose refuse is burned to generate a combustion product gas. These combustion products are sent directly from the main combustion chamber through the outlet opening to the inlet opening of the reburn unit.

Combustion works particularly well for certain types of refuse, if a grate device is provided above the floor of the main incinerator and very close to the inlet opening. The grate device holds the debris for a limited time after the debris is introduced through the inlet opening. As a result, the grate device causes the refuse to fall to the floor of the main room during the continuation of combustion. The use of an auxiliary grate in this manner is particularly advantageous for various types of refuse consisting of humid materials or materials containing high Btu flammables. In the former case, the debris is kept on the grate for a short time so that it is dried and then falls to the floor of the main room. Otherwise, it will be more difficult to keep the combustion in the desired state.

In the case of high Btu refuse, holding it on a grate will cause some of the refuse to volatilize and begin burning at a relatively high temperature. As the remainder falls off the grate, the temperature drops, thus reducing the tendency of the chamber floor to slag.
The method of burning the refuse to achieve this effect first supplies the refuse through an inlet opening to the enclosed main room of the incineration system, more specifically on a grate in the main room. Below this grate is a refractory floor. In this method, some of the refuse is continuously burned while being on the grate.

While the refuse continues to burn, it generally falls on the floor of the main room by falling. Finally, the garbage keeps burning on the floor. Burning of the refuse in the incineration system often produces ash, which is released into the water-filled pit. fact,
This water separates the environment inside the incinerator from the environment outside the room. By removing these ashes and sometimes,
Keep the pit from filling with ash.

An improved apparatus for removing ash from a pit is as follows.
Has an elongate track with its first end near the pit. The second end is located upward away from the first end. The scooping device moves along the track, and the device includes the first and second scooping devices.
The form is shown. In the first form, it scoops ash, the second
In form, they release scooped ash.

The scooping device is moved along the track by the elevator until the scooping device reaches a first position near the first end in the pit. At this position, the scooping member itself is in the pit water.

The scooping member is then moved by the elevator to a second position near the other end of the track. In this position, the rescue element is completely out of the pit water. Finally, a control device is connected to the scooping member. The controller moves the scoop from the first configuration to the second configuration when in the first position within the pit. Thereby, the scooping member actually catches the ash and other waste in the pit.

[0030] When in the second position, ie, the raised position, the controller moves the scooping member from the first configuration to the second configuration. As a result, the scooping member releases the scooped ash. Typically, the ash then falls into a container or truck.

The task of removing ash and other waste from the pit begins by lowering the scoop along the track until it reaches a first end near the pit. Then, the descent of the scooping member stops. The shape of the scooping member changes so as to scoop up the waste in the pit. The scooping member rises from the pit along the track while retaining the waste. When the scooping member exits the pit, it changes from the first configuration to the second configuration and spills ash at an appropriate position.

FIG. 1 shows an incineration system indicated generally by the reference numeral 30. Bulk litter or hydrocarbon-containing liquid is introduced into the incineration system 30 through the loader 31, and further into the main chamber 3.
Introduce to 2. The solid waste remains on the vibrating hearths 33, 34 for the majority of its time while remaining in the incineration system 30. When the fuel bed is complete, the residual ash falls into the pit 35 where the removal mechanism 36 lifts the ash and transfers it to the truck 37. Main room 3 by door 38
2. Go into the interior of 2 to allow normal maintenance.

The combustion gas generated by the combustion in the main chamber passes through two reburn tunnels 41 and 42 and is sent through the next processing recirculation and heat removal step 43. These gases are finally discharged from the chimney 44. The heat recovered from the incineration system 30 is sent to a tube 45.

In FIG. 2 and FIG.
Reference numeral 42 includes first reburning steps 51 and 52 and second reburning steps 53 and 54, respectively. First step 51,5
Burners 55 and 56 at the start of tunnel 2
Maintain the temperature of 42 at the desired level suitable for operation. These burners also bring the reburn temperature to an appropriate level at the start of operation. In fact, the incineration system needs to reach its operating temperature for the first time after it has been shut down and before it can take in the waste. The burners 55, 56 serve for this purpose.

The blowers 57 and 58 send air to the first combustion step, and the blowers 59 and 60 send air to the second combustion step. Gas from the second step 53, 54 is sent through outlets 63, 64. The cross-sectional areas of the second reburning steps 53 and 54 are respectively equal to the first reburning step 5 of the tunnels 41 and 42.
It is larger than the cross-sectional area of 1,52. To this end, the second reburning steps 53 and 54 are performed by taking in the air,
Large amounts of gas resulting from the combustion of the evaporated hydrocarbons in 42 can be received. This is one way to increase the volume from the entrance to the exit of the reburn tunnel. Other ways of accomplishing this same objective include those described below in connection with FIGS.

After passing through the second steps 53 and 54, the gas is sent to the next processing section 43. As shown in FIGS. 4 and 5, gas from the main chamber 32 is sent through outlet openings 67 and 68, which also serve as inlet openings to the reburn units 41 and 42, respectively. Dampers 69, 70
Are in the positions shown in FIGS.
Cover 7,68 and close them. During operation, of course, at least one of the dampers 69, 70 is open.
When there is sufficient combustion material inside the main chamber 32, both dampers open, sending gas through the reburn tunnels 41,42.

The dampers 69, 70 have axial extensions 71, 72 for moving them. Extension portion 71,
Lever arms 75 and 76 are firmly connected to 72.
The lever arms 75 and 76 are connected to the piston 7 by the rods 77 and 78.
9 and 80, these pistons being fixed at their other ends to the brackets 81 and 82. When the pistons 79, 80 in FIGS. 3 and 5 extend, the lever arm 76 and its mating arm (not shown) rotate about their axis 72, opening the dampers 69, 70.

The counterweights 83 and 84 are rotatably connected to the other ends of the lever arms 75 and 76, respectively. Their counterweights counterbalance the weight of the dampers 69, 70 and facilitate their controlled movement. Most of the weight of the dampers 69, 70 is due to having a cover of refractory material 86 as shown in FIG. This, of course, prevents the high temperature and corrosion of the gas flowing around it.

To further protect the dampers 69, 70, they have air channels as described below with reference to FIG. The flow of air through the dampers 69, 70 keeps them at such a temperature that they do not break.

Similarly, the dampers 91 and 92 cover the outlet openings 63 and 64 of the reburn tunnels 41 and 42, respectively. However, as shown in FIG.
92 covers up to about 60% of the outlet openings 63, 64, even when in the closed position as shown therein. When closed, the dampers retain gas in the reburn tunnels 41, 42 for a longer period of time to make combustion more complete. Typically, such retention is desirable when the tunnels 41, 42 frequently treat the main chamber 32 with substantially less than the system's maximum waste throughput, or maximum combustion gas throughput. .

The dampers 91, 92 operate independently of each other, depending on the conditions in the respective reburn tunnels 41,42. The dampers are controlled, for example, by temperature sensors in each tunnel. Lower temperatures indicate the need to close dampers appropriate to retain heat in each tunnel. Also, when the incineration system generates steam, the damper control measures the steam pressure generated by the system. A decrease in steam pressure indicates that there is less heat in the system. This is an indication that one or both of the dampers 91, 92 need to be closed at least to some extent.

The dampers 91, 92 of FIG. 6 not only have a fully open or fully closed position, but also occupy an intermediate position which effectively closes the outlets 63, 64 by less than their maximum closure. be able to. The movement of the damper 91 is caused by the action of a lever arm 93 connected to a piston 94 for performing a desired movement between opening and closing as shown in FIG. A cable 95 is attached to the damper 91, and the cable turns around the pulley 97 and is connected to the damper 91.
Is connected to the weight 99 that balances the weight of the vehicle. In FIG.
A cable 96, a pulley 98 and a counterweight 100 for the tunnel 42 are shown.

The choke dampers 91 and 92 serve to prolong the residence time of the gas in the reburn tunnels 41 and 42. In other words, it acts to slow the flow of gas through these chambers. In order for combustion to be desirable, the gas velocity should typically not exceed about 55 feet per second. The gas should flow at less than about 46 feet per second to ensure proper combustion.

The dampers 91 and 92 have a rectangular block shape as shown in the figure, and are opened and closed by pivoting. It can also be a square block so that their dampers can slide laterally to a position that partially closes the outlet openings 63, 64, and by sliding them laterally in the opposite direction. You can also open it.
In fact, the damper can even slide through openings in the outer wall of the incineration system for this purpose.

As another method, the reburn tunnel 4
The choke dampers at the ends of the 1, 42 can also be in the form of butterfly valves. In this way they will be located in the round or rectangular shape within the outlet of the reburn unit.
The butterfly valves then pivot about their center to partially open and close the outlet of the reburn tunnel.
In this case, the valve is within the opening, but minimizes the area occupied by its edges so as to not substantially obstruct the gas flow.

FIG. 7 shows a typical damper, for example, a closure 70 for an outlet opening 68 to the second reburn tunnel 42 shown in FIG. In FIG. 7, air is supplied through the damper 70 so that the temperature does not rise to a level where the damper 70 is severely damaged by the surrounding heating environment. As can be seen from FIG. 5, the end of the axial extension 72 is located outside the tunnel 42.

Since the interior of the extension 72 is hollow, gas can pass therethrough. A flexible tube 104 connects to a closer axial extension 74 to provide a cooling gas source to provide a cooling gas source. The cooling gas is sent to the shaft 106 through the interior of the extension 72,
Sent to 0. The cooling gas then flows through the passage formed by the partition 112 and indicated by arrow 114. After all,
The cooling gas reaches the opening 116 in the shaft 106 where it passes through the other axial extension 72 and through it to the flexible tube 118.

FIG. 8 shows a reburn tunnel denoted by reference numeral 123, which is a portion 51 of the reburn tunnel 41,
Or 53, or as part 52 of the reburn tunnel 42,
Functions as 54. The tunnel 123 is located on the supports 124 and 125 as a whole. The tunnel 123 is surrounded by a skin 126, and a pneumatic chamber 127 is formed between the skin and the wall 128. Pressurized air is sent to the air pressure chamber 127 by a blower 129. From there, air is channeled through a nozzle 130 and from there to the interior 131 of the reburn tunnel 123. Inner wall 128 and nozzle 1
30 is covered with refractory material 132, thereby protecting the interior 131 of tunnel 123 from the heat and corrosive environment. Further, the air in the pneumatic chamber 127 passes through the support 133 and the exciter 134 located inside the tunnel 131.
Sent inside. From there, it passes through the nozzle 135 and the interior 13
Sent to 1 where it aids combustion.

The support 133 itself generally has an inner wall 138 of a metallic component. Refractory material 139 surrounds wall 138 and protects the wall from the tunnel environment. Support 1
33 has a rectangular cross section when viewed in a plane parallel to the surface on which the tunnel sits. In this way, the support will have a maximum cross-sectional area due to the interference of the gas flow in the tunnel.

Similarly, the exciter 134 is connected to the metal inner wall 1.
Fireproof cover 1 to prevent 42 from being damaged by corrosion or heat.
Protected at 43. Put the fireproof cover 143 on the nozzle 135
Penetrates. As shown in FIG. 8, the air leaving nozzle 135 flows with a tangential velocity component. In other words, the nozzle 135 forms an angle with the radius from the center of the exciter 134. A preferred angle is 45 °.

The nozzle 135 has a tangential velocity component.
The air exiting is sent out along the path indicated by arrow 144. Due to this tangential flow of air inside the tunnel 1
It mixes efficiently and effectively with the combustible gas contained in 31.
Further, nozzle 135, like outer nozzle 130, has an axial velocity component in the delivered air. That is, the nozzle is arranged downstream. The air exiting the nozzle is actually 45 degrees axially, i.e. downstream.
Make °.

Further, the nozzles 135 are formed in the excitable member 134 in a line from the inlet to the outlet. To assist in generating the desired turbulence within the interior 131 of the tunnel, the nozzles have alternating rows of shapes to provide more air and create more turbulence.

The structure of FIG. 8 can be variously modified for different purposes. Thus, when the nozzle 130 is closed, the pneumatic chamber 1
All of the air from 27 goes around the outer perimeter of the wall 128, flows through the support 133 into the interior of the exciter 134, flows out of the nozzle 135 and flows into the interior 131 of the tunnel. This is effective in producing the turbulence required for combustion.

Further, the outer wall 126 and the inner wall 12 of the pneumatic chamber
8 allows the air from the blower 129 to flow around virtually all of the pneumatic chamber 127 and then to the inlet 14 to the support 133.
Try to reach 6. Thus, there is an effect that the inner wall 128 is cooled by the air before the air flows into the interior 131. Furthermore, the tunnel 1
The temperature in 23 is maintained at the level required for combustion.

Further, it is possible to eliminate the necessity of installing a nozzle on the exciter 134. In this case, the interior 131 of the tunnel
All of the air flowing into the refueling unit 123 is sent through nozzles 130 in the reburn unit 123 itself. Nevertheless, the exciter must still allow some air to flow therethrough from one support to the other. this is,
This is to provide a cooling effect so that heat in the reburn tunnel 123 does not destroy the excitable member 134.

With or without nozzle 135, exciter 134 serves another additional purpose. The heat generated in the interior 131 of the tunnel 123 assists in burning the gas inside. Heat near the center of the interior 131 is transmitted to the refractory cover 143 of the exciter 134. From there, the heat accumulated in the interior 131 is radiated to further promote combustion.

To re-reflect the absorbed heat, the exciter 13
Few heat flows through the wall of No. 4. Thus, it must generally have a low thermal conductivity constant k of about 60 or less. Further, the air entering the interior 131 must create turbulence for combustion. Exciting member 134 reduces the maximum effective radius of the space inside tunnel 123. Thus, the air flowing into the interior 131 reduces the distance it reaches the combustion gases. Therefore, the turbulence necessary for the exciter 134 is more effectively generated.

Preferably, the space between the outer surface of the refractory cover 143 of the exciter 134 and the inner surface of the refractory 132 covered by the inner wall 128 is all kept at a fixed distance around the exciter 134. Is done. Because of this, the oxygen flowing into the interior 131 of the tunnel mixes most effectively and produces turbulence. As shown in FIG. 8, in the case of a cylindrical reburn tunnel, the interior 131 has an annular shape.

In the case of a combustion system with one reburn tunnel, one exciter is obviously sufficient. First to first
In the case of a system having two reburn tunnels as shown in FIG. 6, one or both of the tunnels has an exciter. Of course, the exciter has the most desirable shape as described above.

FIG. 9 shows a portion of the reburn tunnel 153, which substantially represents one of the reburn tunnels 41 or 42 shown in FIG. The inner wall 154 has a refractory cover 155 but no nozzles therethrough. All the air flowing into the interior 156 of the tunnel 153 passes through the nozzle 157 of the exciter 158. The air is supplied to the first and second supports 159, 1 as described above.
It flows into the exciter 158 through 60 and eventually flows out of the pneumatic chamber 161. As shown in FIG.
Delivers pressurized air, which eventually flows through nozzle 157 into interior 156.

As described above, the nozzle 157 introduces air having an axial velocity component. In other words, at least a portion of the air flows in a direction from the entrance to the exit of the reburn tunnel 153 or from the first support 159 to the second support 160.
It is introduced in the direction toward.

Further, as shown in FIGS. 9 and 10, the nozzle transmits a tangential velocity component to the air passing therethrough together with a radial velocity component. Again, this nozzle introduces air at an angle of about 45 ° to the radial direction. Thus, half of the non-axial velocities of the gases move them out, and the other half moves around the interior 156. The results are shown in FIG. 10, where arrow 165 indicates a general swirl motion relative to the direction of air movement.

The air pressure chamber 161 does not extend over the entire circumference of the reburn tunnel 153. Rather, it only needs to extend from blower 162 to first support 159. The outer wall 167 forms a pneumatic chamber 161 together with a circumferential portion that is recessed along the axial direction of the outer wall 154 attached to the refractory member 155. FIG. 11 is a schematic sectional view of a reburn tunnel having an outer wall 180, a refractory member 181, and two exciters 182 and 183. The arrows indicate the direction of gas flow, as shown in FIGS. In FIG. 11,
The exciters 182, 183 have the same constant cross-sectional area. However, the cross-sectional area of the interior 184 increases in the direction of gas flow as the cross section of the refractory member 181 slopes outward. This increases the amount of air introduced into the reburn portion through the wall 181 or the exciters 182,183. The cross-sectional area of the excitable member 184 also increases gradually because the inner slope of the refractory member is formed gradually.

FIG. 12 shows another type of reburn tunnel. It also has outer walls 190, 191,
It has refractory members 192, 193 and excitable portions 194, 195. As shown here, the interior 196 rapidly increases in a stepwise manner with a discontinuity at the joint 197. This shows, for example, the joint between the two separate reburning steps shown in FIGS.

FIG. 13 shows a reburn portion having outer walls 200 and 201, refractory members 202 and 203, and excitable portions 204 and 205. There, the interior 206 gradually increases at the junction 207 between the two parts. However, the sloping wall at the junction 207 produces less undesirable additional turbulence than the very abrupt discontinuity 197 of FIG.

Another reburn portion is shown in FIG. 14 and has an outer wall 210, a refractory member 211 and excitable members 212, 213. Since the cross-sectional area of the exciting member 213 is smaller than that of the exciting member 212, the gas
As it flows from 12 to the exciter portion 213, the cross-sectional area 214 of the interior 214 increases.

Finally, FIG. 15 shows the outer wall 220 and the inner wall 22.
1 shows a reburn portion provided with 1 and the excitable members 222 and 223.
When the exciter members 222, 223 are formed in a conical shape, the amount of gas gradually increases as the gas flows across the excitable portion of the interior 224.

Of course, the first combustion of the refuse occurs in the main chamber 32 as shown in FIGS. Spiral feeder 23
0 introduces a specific refuse such as rice husk. More typically, the litter is located in the opening 23 of the front wall 232.
Inflow through one. In each case, the litter entering the incineration system 32 falls on a grate, indicated generally at 234. Then it starts burning immediately.

If the refuse is highly moist, it is placed on the grate 234 and dried, making it easier to move on to the next combustion. If the garbage falls on the hearth 33 immediately after flowing, it becomes more difficult to dry for the next combustion.

Also, very high calorie (Btu-British calorie) generating materials, such as plastics, burn at very high temperatures.
If this occurs on the floor 33, the uneven heating will attach itself to the hearth. Thus, the refuse falls on the grate 234 for a limited time. However, most of the solidified hydrocarbons in the material are
When the refuse slides down through the grate 234 onto the hearth 33, it has not yet burned. By this point, the volatile hydrocarbon content has already been converted to a gas stream.

As shown in FIGS. 16 and 17, the grate 23
4 is a through hole 235 for dropping refuse on the hearth 33.
Having. The size of the opening of the through hole 235 is 12 to 18 inches. Before most of the solidified hydrocarbons are burned, most types of debris fall onto the hearth.

Since the grate 234 is, of course, in the heat erosive environment of the main chamber 32, it must have some mechanism to cool it in order to prevent its destruction by heat erosion. For this purpose, the grate 234 is
6, 237 and a vertical tube 238. The horizontal tube 236 has couplings 239 and 240, and the horizontal tube 237 has couplings 241 and 242. This allows the grate 234
Can be passed through. The fluid introduced in this way may be air, water, steam or oil.

Further, the horizontal and vertical tubes 236 of the grate 234
238 have a refractory coating on the surface to further protect them from heat. Finally, a wear resistant surface, typically formed of a hard refractory, protects the grate 234 from wear due to dirt falling there. The hearth 33 can be of various shapes. The pulsating hearth disclosed in the aforementioned U.S. Pat. No. 4,475,469 to Basic is particularly recommended. Other hearths are possible, each having various effects.

Thus, for example, the hearth 33 is simply a fixed hearth. Typically, some form of ram or other extruder moves the refuse until the refuse burns to ash and falls to a suitable collection means. However, floors are often designed to assist in the movement of refuse burned with some kind of movement from the inlet to the outlet of the main chamber.

The hearth 33 is of a movable type or a fixed type. However, experience has shown that the mobile type is preferred. Above all, pulsating hearths, whether of the configuration shown in the above-referenced U.S. patent or otherwise, are the most efficient. In the Basic patent, the hearth periodically reciprocates in an arc from the inlet 231 to the outlet. In the same way as scooping and throwing garbage with a snowplow shovel, the hearth with the garbage piled up at the entrance is quickly moved in an arc shape to the exit and stopped quickly, and the garbage is dumped forward in the hearth Such operations are repeated.

The hearth 33 shown in FIG. 16 has a shape that is effective for burning various kinds of refuse. in this case,
The hearth 33 is the ash pit 2 at the exit from the front wall 232 with the entrance.
It is inclined to 44. By slightly inclining the upper hearth 33 and the lower hearth 34, the debris can easily move in response to any movement of the hearth.

Further, the hearths 33, 34 have ridges 246, 247 formed on the upper surfaces thereof, respectively. These form channels and mix the debris thereon to aid combustion. The nozzle 248, which is a fine hole in the upper hearth 33, and the nozzle 249 in the lower hearth 34 inject air to compensate for insufficient combustion, thereby promoting the combustion of refuse.

As shown in FIG. 17, the nozzles 249 of the lower hearth 34, like the nozzles 248 of the upper hearth 33, tilt downward when they inject air into the main chamber 32. This downward angle of the nozzles 249, 248 prevents dirt from entering the nozzles and clogging.

The amount of air introduced through the nozzles 248, 249 varies, in particular, depending on the condition of the main chamber 32. Thus, as noted above, the incineration system may have low waste volumes to operate at or near its capacity. In this case, even with a small amount of air emitted through these jets, the entire incineration system reaches its proper operating temperature.

Instead of the hearths 33, 34, the main chamber 32 may have a grate floor under the grate 234. In that case, the refuse falls from the upper grate to the lower grate, so that its complete combustion takes place. The lower grate may be fixed or may perform some type of movement to transfer the combustion debris in the direction of the ash pit 244.

This can work in connection with the use of choke dampers 91, 92. One way to reduce the amount of air in the main chamber is to simply stop the air being introduced into the second or lower hearth 34. The main chamber 32 has thin film side walls 253, 254 schematically shown in FIGS. Water flows through these walls through the lower inlet pipes 255,256. From there, water flows into the thin-film walls 253, 254 of the tubes 257, 2
Flows through 58 to the top tube 259. The heated water flows therefrom to other parts, providing a useful energy source in the form of steam for power generation, heating, or other purposes.

As mentioned above, the main room does not fill up with refuse to supply heat throughout the incineration system. In this case, the amount of heat extracted from the top tube 259 is small, and sufficient heat is left in the main chamber and the reburn tunnel to maintain a temperature required for clean and effective combustion.

The ash pit 244 of the main chamber 32 has a spiral conveyor 263,264. As a result, the pit 244
Ash is removed from the ash. However, as in other ash removal systems, such as, for example, chain pulling systems, the moving members of the spiral conveyors 263, 264 are underwater or in ash pits, which are difficult to repair. is there. Accordingly, an improved ash removal system is shown in FIGS.

The ash pit 35 is shown schematically in FIG. A typical one contains water 271 and ash 272 at the bottom. The water 271 of course seals between the inside of the main combustion chamber and the atmosphere. The ash 272 is sometimes in the pit 35
Must be removed from To this end, a scooping mechanism, generally designated 273, descends along track 277, and its trough 278 enters water 271 in the form shown by the solid line in FIG. 18 and scoops ash mass 272. Then, when the trough is at the bottom of pit 272, FIG.
Return to the form of transportation indicated by the dotted line 8. This makes the trough 27
8 can scoop up a part of the ash 272.

Thereafter, the scooping mechanism 273 rises along a track 277 having two U-shaped rails laid in parallel with each other. It is preferable that the scooping mechanism temporarily stop immediately after lifting the trough 278 from the water 271. At that time, the water contained in the ash 272 falls from the many openings 281 provided at the bottom of the trough 278. A gutter structure is provided at the back of the track 277, and this allows water dripping from the trough 278 to move during the movement of the pit 35.
Lead to.

When the scooping mechanism 273 returns to the high position shown in FIG. 18, the trough 278 moves from the holding position indicated by the dotted line to the discharge position indicated by the solid line. Ash then orbit 2
During 73, it falls from trough 278 through 282 and is placed in the truck bed or other transport bin. The guard plates 283 hanging down on both sides of the track 273 prevent the ash from being scattered outside the cargo bed of the truck 37.

The scooping mechanism 273 can be moved up and down on a track 277 by a cable 284.
One end of the cable 284 is attached to a typical winch (not shown), and by controlling this winch, the cable 28
4 is rolled up and unraveled. Next, the cable 284 is wound around a pulley 285 fixed to the upper end of the track 277, and the end of the cable 284 is attached to the scooping mechanism 273. As the winch unwinds the cable 284, the cable wraps around the pulley 285 and lowers the scooping mechanism 273 to the pit 35. When the winch winds up the cable 284, the scooping mechanism 273
Is lifted from the water and rises along track 277.

The trolley constituting the main part of the scooping mechanism 273 is shown in detail in FIGS. First, the scooping mechanism 273 is connected to the runner bar 28.
8, 289, and a rigid frame composed of a front cross bar 290 and a rear cross bar 291 firmly attached to the runner bars 288, 289. As shown in FIG. 21, the front wheels 292 and 293 and the rear wheels 294 and 295 ride inside the track 277 having a U-shaped cross section. further,
The horizontal guide wheels 296 and 297 abut the track 277 from outside the rear wheels 294 and 295, respectively. This ensures that the scooping mechanism 273 is properly aligned on the track 277.

The arrangement of the guide wheels 296, 297 is such that the scooping mechanism 2
There is also an effect that the device 73 can be used as it is held on the track. In particular, the guide wheels 296 and 297 abutting on the rail side of the track 277 and the rear wheels 294 and 295 riding on the inside of the track member 277 direct the scooping mechanism 273 to the track 277 roughly. As the cable 284 descends the trough 278 into the pit 35, only the front end of the trolley actually enters the water 271. The rear of the trolley 273, including the wheels 294-297, is always outside the water 271.

Thus, in order to properly orient the trolley of the scooping mechanism 273, the wheels that must always maintain close contact with the rails of the track 277 are outside the water, so that they are corroded by the water or It is not damaged by waste materials.

The fact that the back of the trolley is out of the water has a further effect on controlling the configuration of the trough 278. Trough 278 has a firmly secured flange 301 on which rod 30 is attached.
The two ends are pivotally connected at the joint 303.
The other end of the rod 302 is connected to a piston reciprocally arranged in the cylinder 306. Cylinder 306 is sequentially mounted on rear crossbar 291 with flanges 307 and 308.
Pivot connection between them.

When the pressure in cylinder 306 pushes its piston outward, it causes rod 302 to move to the 19th, 20th
It extends to the right as seen in the figure. This sequentially moves the flange 301 downward. As a result, trough 278
Moves around the rotary coupling 309, 310 to the sidebars 288, 289. This is trough 278
Is pivoted from the position shown by the solid line to the position shown by the dotted line in FIGS.

As a result, when the pressure in the cylinder retracts the piston, the rod 302 moves to the left as viewed in FIGS. 19 and 20, pulling the connection 303 with the flange 301 in the same direction. This is, in turn, the flange 301 and the trough 27
8 is pivoted clockwise from the position shown by the dotted line in FIG. 19 to the position shown by the solid line. This moves the trough from the discharge position to the holding position where it has ashed. This movement naturally occurs in the pit 35 as well, so that the trough 278
Scoops a part of the ash 272.

During such a scooping operation, the trough 27
8 contacts the solid object in the pit 35. This occurs because the incineration system 30 accepts litter without pre-sorting. A common solid object in the pit 35 in this manner is a muffler for an automobile or other metal parts discarded without being separated. Preferably, the cylinder 306 should not move any further when the trough 278 hits a solid object. Thus, at this intermediate position, the trough 278 remains in contact with the solid object.

After the scooping mechanism 273 has been moved, the track 27
As you move 7, pull up the solids along with its trajectory. When the trough 278 reaches its top position, it again moves to its discharge position and drops mufflers and other solids into the trap 37. If the cylinder 306 is of the air control type, it will have cushioning properties by itself and
It provides additional convenience such that the solids can be removed without damaging 77.

The fluid for controlling the cylinder 306 is the hose 3
Flowing through 15, 316, these hoses are sequentially wound around reel 317. As the scooping mechanism 273 moves up and down the track 277, the reel 317 releases or grasps the middle portions 319, 320 of the hose to cause the hose to deviate from the trolley passage.

When the scooping mechanism 273 is at the lowest position again and the trough 278 enters the pit 35, the cylinder 306 and the reel 317 are out of the water. Thus, they are not adversely affected by the chemicals contained in the water or ash, or both. In addition, cable 284
Is always out of the water, as can be seen in FIG. FIG. 22 shows an orbital mechanism generally designated 325, but the chute mechanism for discharging ash to the truck 37 is slightly different from that of FIG. The trolley of the track 277 and the scooping mechanism 273 is substantially the same as the above-described example.

However, the track mechanism 325 has a rotary chute guide 326, and the scooping mechanism 273 is located near the top of the track as shown in FIG. The trough 278 then moves from its holding position to the discharge position. When the ash is scooped from the pit 35 and the ash falls from the trough 278, the shoot guide 326
Directs the ash to the bed of truck 37. Ash 37
After being loaded on the loading platform of FIG.
As shown in FIG. 5, the shovel 327 forms a part of the inclined gutter.

The mechanism for controlling the rotatable chute guide 326 is shown more clearly and in detail in FIG.
This is different from FIG.
6 shows a state when viewed from the opposite side. As shown here, operation of the rotatable shovel 327 of the chute guide 326 results from the operation of the cylinder 330. Cylinder 330
Presses on a piston reciprocally disposed therein, the piston being connected to a lever arm 331 which is fixedly secured to the shovel 327. In that case, the lever arm 33
1 takes the position shown by the dotted line, and the shovel 327 connects to the rest of the chute 326.

When the piston 330 retracts, the lever arm 3
31 is pulled right to the position shown by the solid line in FIG. 23, and the shovel 327 rotates clockwise. For this reason, the waste from the trough 278 falls to the bed of the truck 37.

Another type of scooping mechanism is indicated by reference numeral 337 in FIG. It utilizes the same trolley as in FIGS. Thus, it is crossbar 2
90, 291 with the same runner bars 288, 289. It also moves along the track in the same manner as described above utilizing wheels 292-297.

This trailer uses a bucket 338 instead of the trough 278 shown in the previous drawing, which has a through hole 339 for flowing water. This bucket 33
8 has a rotary coupling at the joint 292 and a flange 340 for controlling its position. The luffing 340 connects to a lever arm 341 attached to the ordinary rod 302. In turn, rod 302 connects to a piston in hydraulic cylinder 344. Bucket 338 has a flange 340 that must be pivotally connected to the trolley via a pivot coupling, as in FIGS.

To ensure proper movement of the rod 302 and lever arm 341, the rod 302 has its joint 303
To connect to another lever arm 346. Lever arm 3
46 is pivotally connected to a flange 347 attached to a crossbar 290 (see FIG. 20) by a support 348. The lever arm 341 thus ensures a correct rotational movement of the joint 303 and, consequently, a scooping movement of the bucket 338.

In operation, the rod 30 is moved by the cylinder 344.
When 2 is extended, bucket 338 rotates clockwise as seen in FIG. In this position, no waste is retained. Then, the scooping mechanism 337 descends along the track 277, and the bucket 338 enters the water. The bucket moves between a track 277 and a gutter 328 formed integrally below the track 277 in parallel with the track.

When the bucket 338 reaches the bottom of the pit 35, the cylinder 344 retracts the rod 302. The action of the lever arms 341 and 346 causes the bucket 338 to move as shown in FIG.
And rotate counterclockwise. In effect, this causes the bucket to move forward and scoop ash when in the pit.

Thereafter, the trolley of the scooping mechanism 337 is moved up on the track 277. Then, the cylinder extends the rod 302, and the bucket 338 moves to the position shown in FIG.
And rotate clockwise to release its contents.

The bucket 338 can also be used in environments that produce heavy ash and waste such as gravel, to clean the incineration system. Thanks to the strong hydraulic cylinder 344, the bucket 338 can not only scoop the ash in the pit 35 but also provide an additional digging force.

The rear hoof trough 27 shown in FIGS.
8 is particularly suitable for incineration of various types of oversized refuse from ordinary cities. Therefore, trough 27
8 must temporarily stop moving forward when it comes into contact with a solid object such as a car muffler or bicycle. Since the air cylinder 306 has a strong cushioning action, when the tip of the trough comes into contact with solid matter, it stops its movement and the cylinder 30
6 or trough 278. Further, the valve device of the cylinder 306 is
If the sphere comes into contact with such a solid, it will attenuate the pressure. This protects many components of the trolley 273 or track 277 from damage.

Replacing the trough 278 with the bucket 338 requires minimal effort. In order to support the bucket, the trolley of the scooping mechanism 337 is mounted on the bracket 345.
And a flange 347. Also, switching between the two mechanisms is simply accomplished by exchanging the cylinders 306, 344 and the trough 278 with buckets 338. Further, bucket 338 requires lever arms 341, 346, and trough 278 does not use such lever arms. Thus, the ash removal system determines which type of scooping mechanism to use depending on the type of refuse introduced into the incineration system.

[Brief description of the drawings]

FIG. 1 is a perspective view of an incineration system device.

FIG. 2 is a plan view of a reburn unit having two separate reburn tunnels, each tunnel having two separate reburn steps.

FIG. 3 is a side view of the reburn unit of FIG. 2 and shows another step of treating exhaust gas.

FIG. 4 is a cross-sectional view of the two reburn tunnels taken along line 4-4 of FIG. 3;

5 is an enlarged view, partially in section, of a damper closing one or both of the two reburn tunnels of FIGS. 1-4.

FIG. 6 shows the outlet openings of two reburn tunnels and a choke damper partially closing each outlet opening.

FIG. 7 shows a damper closing the inlet opening to either of the two reburn tunnels or partially closing the outlet opening.

FIG. 8 is a cross-sectional view of a reburn tunnel having an exciter member therein for allowing air to flow through both the wall of the reburn unit and the exciting wall.

FIG. 9 is a side cross-sectional view of a portion of a reburn tunnel having an exciter member therein for allowing air to flow into the reburn tunnel through a nozzle formed only in the exciter member.

FIG. 10 is a cross-sectional view of the reburn tunnel shown in FIG. 9, taken along line 10-10.

FIG. 11 is a schematic cross-sectional view of a reburn tunnel with an exciter member illustrating various methods of increasing the cross-sectional area of the reburn tunnel from an inlet opening to an outlet opening.

FIG. 12 is a schematic cross-sectional view of a reburn tunnel with an exciter member showing various ways of increasing the cross-sectional area of the reburn tunnel from the inlet opening to the outlet opening.

FIG. 13 is a schematic cross-sectional view of a reburn tunnel with an exciter member illustrating various methods of increasing the cross-sectional area of the reburn tunnel from an inlet opening to an outlet opening.

FIG. 14 is a schematic cross-sectional view of a reburn tunnel with an exciter member illustrating various methods of increasing the cross-sectional area of the reburn tunnel from an inlet opening to an outlet opening.

FIG. 15 is a schematic cross-sectional view of a reburn tunnel with an exciter member illustrating various ways of increasing the cross-sectional area of the reburn tunnel from an inlet opening to an outlet opening.

FIG. 16 is an isometric view in partial cross-section of the main chamber of an incineration system having a grate near the entrance opening to the chamber but above the hearth of the chamber.

FIG. 17 is a cross-sectional view as viewed from an end of the incineration chamber of FIG. 16;

FIG. 18 is a side view of a scoop mechanism for removing ash from an exit pit of an incineration system.

FIG. 19 is a side view of the ash rake used in the mechanism of FIG. 18;

FIG. 20 is a plan view of the rake of FIG. 19;

FIG. 21 is an end view of the rake track guide of FIG. 20 taken along line 21-21.

FIG. 22 is a side view of yet another ash removing mechanism.

FIG. 23 is an enlarged view of the chute mechanism shown in FIG. 22;

FIG. 24 is a side view of another ash removal rake used in the mechanism shown in FIGS.

[Explanation of symbols]

Reference Signs List 30 incineration system 31 loader 32 main room 33, 34 hearth 35 pit 36 removal mechanism 37 truck 38 door 41, 42, 123, 153 reburn tunnel 43 heat removal stage 51, 52 first reburn stage 53, 54 second reburn stage 55 , 56 burners 57, 58, 59, 60, 129, 162 blowers 63, 64 ... outlets 67, 68 outlet openings 69, 70, 91, 92 dampers 71, 72 damper extensions 75, 76, 93 lever arms 77, 78 Rod 79, 80, 94 Piston 81, 82 Bracket 97, 98 Pulley 99, 100 Counterweight 96 Cable 104, 118 Flexible tube 108 Opening 110 Room 112 Partition wall 124, 125 Support 126 Outer shell 127, 161 Pneumatic chamber 130, 135, 157 nozzles 131, 184, 96 interior 132 of relapse tunnel, 139, 155, 192, 193 refractory member 133 support 134, 158, 182, 183, 194, 195, 2
04, 205, 212, 213 Exciting member 142 Inner wall 143 Fireproof cover 159, 160 Support 180, 190, 191, 200, 201 Outer wall 197 Joint 234 Grate 236, 237 Vertical pipe 238 Horizontal pipe 244 Ash pit 246, 247 Ridge 248,249 Jet nozzle 253,254 Thin film side wall 271 Water 272 Ash 273 Trolley 284 Cable 277 Track 278 Trough 315,316 Hole 325 Track mechanism 344 Hydraulic cylinder

Claims (8)

[Claims] 1. A reburn unit connected to a discharge outlet of a gaseous fluid containing combustible hydrocarbons, the unit comprising: (1) an inlet opening through which the fluid flows, and (2) the reburn. An outlet opening for discharging gaseous combustion products from the unit, (3) a burner means connected to the reburn unit and burning fuel in the unit, and (4) an oxygen-containing gas connected to the reburn unit. (A) the reburn unit has first and second separate reburn portions, and (B) the inlet opening. Has first and second inlet ports,
These first and second inlet openings are connected to the outlet opening via a flowing fluid and open into the first and second reburn sections, respectively; (C) the outlet opening is (D) the burner means has first and second burner portions, and the first and second burner portions have first and second burner portions. And (E) the oxidizing means has a first and a second oxidizing portion, wherein the burner portion burns fuel in the first and second reburning portions, respectively.
The fog combustion device according to claim 1, wherein the oxidizing portions are provided in the first and second reburning portions, respectively, and the oxygen-containing gas is introduced into the first and second reburning portions, respectively. 2. A reburn unit connected to a discharge outlet of a gaseous fluid containing combustible hydrocarbons, the unit comprising: (1) an inlet opening through which the fluid flows, and (2) the reburn. An outlet opening for discharging gaseous combustion products from the unit, (3) a burner means connected to the reburn unit and burning fuel in the unit, and (4) an oxygen-containing gas connected to the reburn unit. And (A) the reburn unit is provided with exciter means so as to surround the inside thereof, and the exciter means Extends over the majority of its length from the inlet opening to the outlet opening without contacting the walls of the unit, and is cross-sectional to the passage from the inlet opening to the outlet opening Wherein the cross-sectional area of the reburning chamber inside the reburning unit is reduced, and (B) the reburning unit is connected via a fluid flowing to the oxidizing means and constitutes a part of the oxidizing means. And a plurality of nozzle means connected to the exciter means and opened to the surface of the exciter means, the nozzle means being adapted to contain the oxygen-containing gas into a space between the inner surface of the reburn unit and the exciter means. A fume combustion device, wherein the fluid is introduced at a non-perpendicular angle to the passage. 3. A reburn unit connected to a discharge outlet of a gaseous fluid containing combustible hydrocarbons, the unit comprising: (1) an inlet opening through which the fluid flows, and (2) the reburn. An outlet opening for discharging gaseous combustion products from the unit, (3) a burner means connected to the reburn unit and burning fuel in the unit, and (4) an oxygen-containing gas connected to the reburn unit. And an oxidizing means for introducing the gas into the reburning unit, wherein the reburning unit is connected to the outlet opening, and choke means for selectively reducing a cross-sectional area of the outlet opening is provided. A fume combustion device, comprising: 4. A reburn unit connected to a discharge outlet of a gaseous fluid containing combustible hydrocarbons, the unit comprising: (1) an inlet opening through which the fluid flows, and (2) the reburn. An outlet opening for discharging gaseous combustion products from the unit, (3) a burner means connected to the reburn unit and burning fuel in the unit, and (4) an oxygen-containing gas connected to the reburn unit. And an oxidizing means for introducing the gas into the reburning unit, wherein the reburning unit includes an exciting means so as to surround the inside thereof, and the exciting means includes For the majority of its length, it extends from the inlet opening to the outlet opening without contacting the walls of the unit, and has a cross-section relative to the passage from the inlet opening to the outlet opening. Reducing the cross-sectional area of the reburn chamber inside the reburn unit, wherein the exciter means, inside the reburn unit, covers a surface covered with a heat-resistant and corrosion-resistant material facing a wall of the unit. A fume combustion device, comprising: 5. A reburn unit connected to a discharge outlet of a gaseous fluid containing combustible hydrocarbons, the unit comprising: (1) an inlet opening through which the fluid flows, and (2) the reburn. An outlet opening for discharging gaseous combustion products from the unit, (3) a burner means connected to the reburn unit and burning fuel in the unit, and (4) an oxygen-containing gas connected to the reburn unit. And an oxidizing means for introducing the gas into the reburning unit, wherein the reburning unit is provided with exciting means so as to surround the inside thereof, and the exciting means is provided with:
For the majority of its length, it extends from the inlet opening to the outlet opening without contacting the walls of the unit, and reburns inside the reburn unit in a cross-section to the passage from the inlet opening to the outlet opening. The cross-sectional area of the chamber is reduced, and the surface of the exciter facing the inner peripheral surface of the reburn unit has a heat conduction constant k. Composed of smaller materials, q is the thermal conductivity in Btu / hr., where surface thickness l in inches, area A in square feet, and ° F.
5. The fume combustion apparatus according to claim 4, wherein the temperature is a unit temperature T. 6. (A) The fumes from a discharge source outlet of a gaseous fluid containing combustible hydrocarbons are directly transferred to a first reburning portion of a first reburning portion.
Feeding to the inlet port and to the second inlet port of the second reburn portion; (B) burning fuel in the first and second reburn portions; and (C) containing an amount of oxygen. Introducing gas into the first and second reburning portions; and (D) delivering gaseous combustion products from the first and second reburning portions through first and second outlet openings, respectively. A fume burning method. 7. A step of directly sending the fume from a discharge outlet of a gaseous fluid containing combustible hydrocarbons to an inlet opening of a reburn unit, and B. a large length in the reburn unit. An exciter is provided extending from the inlet opening to an outlet opening from which the gaseous combustion products are discharged from the reburn unit without contacting a portion with the wall of the reburn unit, and is surrounded by the reburn unit. (C) burning the fuel in the reburn unit, and (D) burning the fuel in the reburn unit. An amount of oxygen-containing gas is introduced into the intervening space at a non-perpendicular angle with respect to the flow path of the gas sent from the first plurality of nozzles disposed on the surface through the exciter member. (E) the first step Discharging the gaseous combustion products from the second reburning portion through the first and second outlet openings, respectively. 8. A step of directly sending the fume from a discharge source outlet of a gaseous fluid containing combustible hydrocarbons to an inlet opening of a reburn unit, and (B) burning fuel in the reburn unit. (C) introducing a quantity of an oxygen-containing gas into the reburn unit; (D) sending gaseous combustion products in the reburn unit through an outlet opening; Selectively reducing the cross-sectional area. A method for burning fumes from the output of a source.