JP2005186061A - Apparatus for providing detonative cleaning communication and method for cleaning vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for cleaning a surface within a vessel by detonation. <P>SOLUTION: An apparatus for providing detonative cleaning through a vessel wall is provided with a first conduit (146) penetrating the vessel wall. A first valve (142) has an open condition permitting communication through the first conduit (146) and a closed condition. A second conduit (170) has an insertion portion dimensioned to be received within a receiving portion of the first conduit (146). A second valve (178) has an open condition permitting communication through the second conduit (170) and a closed condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to industrial equipment, and more particularly to cleaning industrial equipment.

Surface fouling is a significant problem in industrial equipment. Such equipment includes furnaces (such as coal, petroleum, waste), boilers, gasifiers, reactors, heat exchangers, and the like. Typically, industrial equipment includes a vessel with an internal heat exchange surface on which fouling or slag due to deposition of particles of ash, minerals and other combustion products and combustion by-products and soot More concentrated deposits such as fouling are likely to occur. Such particle deposition can gradually hinder the operation of the facility, reducing efficiency and throughput and causing damage. Thus, cleaning equipment is highly desirable, but with some associated problems. In many cases, direct access to the fouling surface is difficult. Furthermore, it is desirable to minimize the downtime and cleaning costs associated with industrial equipment to maintain revenue. Various techniques have been proposed so far. As examples, Patent Documents 1 to 3 describe various techniques. Another technique is disclosed in Non-Patent Document 1. Non-Patent Documents 2 and 3 describe specific explosion wave techniques. Such an apparatus is also described in US Pat. These devices are often referred to as “soot blowers” after the exemplary application of this technology.
US Pat. No. 5,494,004 US Pat. No. 6,438,191 US Patent Application No. 2002/0112638 Yugoslavia Patent No. P1756 / 88 Specification Yugoslavia Patent No. P1728 / 88 Specification Hugh zet. (Huque, Z.), "Experimental Investigation of Slag Removal Using Pulse Detonation Wave Technique, 19th Annual DOE / HBCU / Miami 19th Annual Symposium". March 16-18 Hanjalic Kay. (Hanjalic, K.) and Samajevik Eye. (Smajevic, I.), Cleaning of boiler heating surfaces using detonation waves (Further Experience Waves for Cleaning Boiler Heating Surfaces), International Energy Research Journal Vol. 17 (International Journal of Renewal Energy). 1993, p. 583-595 Hanjalic Kay. (Hanjalic, K.) and Samajevik Eye. (Smajevic, I.), “Detonation-Wave Technology for On-load Deposition of Surfaces Exposed to Foaling I, II to remove deposits from fouling surface during loading. , Gas Turbine and Power Engineering Journal, ASME Bulletin Vol. 1 (Journal of Engineering for Gas Turbines and Power, Transactions of the ASME, Vol. 1), January 1994, p. 223-236

  Regardless of the technology described above, further improvements are sought in the art.

  One form of the invention includes an apparatus that provides detonation cleaning communication through a container wall. A first conduit extends from the container wall. The first valve has an open state and a closed state that allow communication of the first pipe line. The second conduit has an insertion portion dimensioned to be received by the receiving portion of the first conduit. The second valve has an open state and a closed state that allow communication of the second pipe line.

  In various embodiments, one valve can be a sliding gate valve and the other valve can be a sliding gate valve or a hinged gate valve. One valve may be manual or mechanically driven and the other valve may be manually or mechanically driven. Means may be provided for sealing the first conduit relative to the second conduit over a first range in which the second conduit is inserted into the first conduit. The second conduit may have an inner surface that is off-axis with respect to the outer surface.

  Another aspect of the present invention includes an apparatus that provides detonation cleaning communication through a container wall. A conduit defines a flow path through the container wall. A valve provided along the flow path has an open state and a closed state.

  In various embodiments, fuel and oxidant sources can be coupled to the conduit. By means, a charge of fuel and oxidant can be ignited. The valve can be fixed to the wall and can be provided along the downstream half of the flow path. The valve may be a first valve provided at the upstream end of the access conduit. The apparatus may include a second valve along the conduit upstream of the first valve and upstream of the insertion portion of the conduit inserted into the access conduit. The valve may be a first valve provided between a main part of the pipe line and a downstream insertion part of the pipe line. The apparatus may include a second valve at the upstream end of the access line that receives the insert.

  Yet another aspect of the present invention includes a method for cleaning an interior surface of a container. The container has a wall and an access line that is initially sealed by a first valve. The insertion part of the combustion line is inserted into the access line. The combustion line has a second valve. A seal is formed between the access line and the combustion line. The first valve is opened. The second valve is opened. The combustion gas is passed through the combustion line and into the vessel. The insert is withdrawn from the access line.

  In various embodiments, the first valve can be opened at an intermediate stage of insertion. A seal may be formed between the combustion line and the access line. The seal can be formed before opening the first valve. Opening one valve may involve pivoting the gate of this valve. Opening the other valve can be done manually.

  The details of one or more examples of the invention are set forth in the accompanying drawings and the embodiments below. Other features, objects, and advantages of the invention will be apparent from the embodiments and drawings, and from the claims.

  FIG. 1 illustratively shows a furnace 20 having three associated soot blowers 22. In the illustrated embodiment, the furnace vessel is in the shape of a cuboid and the soot blowers are all associated with a single common wall 24 of the vessel and are arranged at a similar height along the wall. Other configurations are possible (such as a single soot blower, one or more soot blowers each provided at multiple heights).

  Each soot blower 22 includes an elongated combustion line 26 extending from an upstream distal end 28 remote from the furnace wall 24 to a downstream proximal end 30 proximate the wall 24. However, the end 30 can also be provided completely inside the furnace. During the operation of each soot blower 22, the combustion of the fuel / oxidant mixture in line 26 begins near the upstream end (within 10% from the upstream of the line length), and the surface within the internal volume of the furnace is A detonation wave is generated that is released as a shock wave along with the associated combustion gas from the downstream end for cleaning. Each soot blower 22 can be associated with a fuel / oxidant source 32. Such a source, or one or more parts thereof, can be shared between separate soot blowers 22. The exemplary source 32 includes a liquefied or pressurized gaseous fuel cylinder 34 and an oxygen cylinder 36 provided in corresponding containment structures 38, 40. In an exemplary embodiment, the oxidant is a first oxidant such as substantially pure oxygen. The second oxidant may be factory air supplied from a central air supply 42. In the exemplary embodiment, air is stored in the air accumulator 44. The expanded fuel from the cylinder 34 is generally stored in a fuel accumulator 46. The exemplary sources 32 are each connected to the associated conduit 26 by appropriate piping located below. Similarly, the soot blowers 22 each include an ignition box 50 that initiates combustion of the fuel oxidant mixture, which is controlled by a control and monitoring device (not shown) along with the supply source 32. FIG. 1 shows that the wall 24 includes several ports for inspection and / or measurement. Exemplary ports include an optical monitoring port 54 and a temperature monitoring port 56 associated with each soot blower 22, which are infrared and / or for observation of the surface to be cleaned and internal temperature monitoring. Accepts a visible light video camera and a thermocouple probe, respectively. Other probes / monitoring / sampling may be utilized for pressure monitoring, composition sampling, and the like.

FIG. 2 shows other details of an exemplary soot blower 22. An exemplary detonation conduit 26 includes a series of conduit portions or conduit segments 60 with flanges on both sides arranged from upstream to downstream, and a downstream portion 64 extending through a wall opening 66. And a downstream nozzle line portion that terminates at the downstream outlet 30 exposed to the furnace interior 68, ie, a downstream nozzle line segment 62, or a downstream nozzle line segment 62. The term nozzle is widely used and does not require the presence of aerodynamic contraction, expansion, or a combination thereof. An exemplary conduit segment material is a metal (such as stainless steel). An outlet 30 can be provided deeper in the furnace if adequate support and cooling is provided. FIG. 2 further shows tube bundles 70 inside the furnace, and fouling is likely to occur on the outer surface of these tube bundles. In the exemplary embodiment, the conduit segments 60 are each supported on an associated trolley 72 and the wheels of the trolley 72 engage a track device 74 provided along the floor 76 of the facility. The exemplary track device 74 includes a pair of parallel rails that engage the concave peripheral surface of the wheel of the trolley 72. Exemplary segment 60 is similar in length L _1, and is bolted in series by columns of the corresponding corresponding bolt provided on the bolt holes in the flange. Similarly, the downstream flange of the most downstream segment 60 is bolted to the upstream flange of the nozzle 62. In an exemplary embodiment, a reaction strap 80 (e.g., cotton or a thermally / structurally rugged synthetic material) includes one or more metal coil reaction springs 82 on the last coupled flange pair, and Environmental structures such as combustion lines and furnace walls that are connected in series and elastically absorb reaction forces associated with the discharge of the soot blower 22 and are accurately positioned in the next ignition. And connect. Further, an additional attenuation means (not shown) can be provided. The reaction strap / spring combination can be configured in series or as a loop. In the exemplary embodiment, the overall length of the combined downstream section is L _2.

Predetonator conduit section / segment 84, from the upstream end portion 28 extends downstream, it is possible also in this predetonator Todorokikanro segment comprising a flange on both sides, it has a length L _3. The pre-explosive soot line segment 84 is smaller than the characteristic internal cross-sectional area (eg, average, median, mode, etc.) of the downstream portions 60, 62 of the combustion line (line axis / centerline of the line) Characteristic internal cross-sectional area (crossing 500). In an exemplary embodiment that includes a circular cross-section conduit segment, the pre-explosion cross-sectional area is characterized by a diameter of 8-12 cm and the downstream portion is characterized by a diameter of 20-40 cm. Thus, an exemplary cross-sectional area ratio of the downstream portion to the pre-detonation segment is 1: 1 to 10: 1, more narrowly 2: 1 to 10: 1. The total length L between the end portions 28 and 30 can be 1 to 15 m, and more narrowly 5 to 15 m. In the exemplary embodiment, transition line segment 86 extends between pre-detonation segment 84 and most upstream segment 60. Segment 86 has upstream and downstream flanges that are sized to mate with the corresponding flanges of segments 84, 60 and has an interior surface that provides a smooth transition between the internal cross-sections of these segments 84, 60. Exemplary segment 86 has a length L _4. An exemplary spread half angle of the inner surface of the segment 86 is ≦ 12 °, more narrowly 5-10 °.

  The fuel / oxidant charge can be introduced into the detonation line in various ways. There may be one or more different fuel / oxidant mixtures. Such a mixture can be premixed outside the detonation line or mixed during or after introduction into the line. FIG. 3 shows segments 84 and 86 configured to separately charge two different fuel / oxidizer formulations, a pre-detonation formulation and a main formulation. In the exemplary embodiment, in the upstream portion of the segment 84, a pair of pre-explosive fuel injection lines 90 are connected to a port 92 provided in the segment wall that defines the fuel injection port. Similarly, a pair of pre-explosive oxidant lines 94 are connected to the oxidant inlet port 96. In the exemplary embodiment, these ports are provided in the upstream half of the length of segment 84. In the exemplary embodiment, each fuel injection port 92 is paired with an associated oxidant port 96 that is at the same axial position as the associated oxidant port and opposed injection mix of fuel and oxidant. (Provided by way of example as 90 °, but other angles including 180 ° are possible). As will be described in more detail below, a purge gas line 98 is connected to the purge gas port 100 located further upstream. An end plate 102 bolted to the upstream flange of the segment 84 seals the upstream end of the combustion line and has an operative end 108 inside the segment 84 (such as a spark plug). Passes through the end plate 102.

  In the exemplary embodiment, main fuel and main oxidant are input to segment 86. In the illustrated embodiment, main fuel is carried by several main fuel lines 112 and main oxidant is carried by several main oxidant lines 110. Each main oxidant line 110 has a termination that concentrically surrounds the associated fuel line 112 so that main fuel and main oxidant are mixed at the associated inlet 114. In the exemplary embodiment, the fuel is a variety of hydrocarbons. In a particular exemplary embodiment, both fuels are the same and are drawn from the same fuel source, but with different oxidizers or substantially pure oxygen for a pre-detonation mixture and air for the main mixture, respectively. Mixed. An exemplary fuel useful in this case is propane, MAPP gas, or a mixture thereof. Other fuels including ethylene and liquid fuels (such as diesel oil, kerosene, and jet flight fuel) can also be used. The oxidant may comprise a mixture, such as an air / oxygen mixture in a ratio suitable to obtain the desired main detonation and / or pre-detonation charge chemistry. In addition, a monopropellant fuel having a molecularly combined fuel and an oxidant component may be an option.

  In operation, the combustion line is emptied with the exception of air (or other purge gas) at the beginning of the use cycle. Next, pre-detonation fuel and pre-depletion oxidant are injected via the associated ports, filling segment 84 and partially extending into segment 86 (eg, near midpoint), advantageously Spreads just beyond the fuel / oxidant port. Subsequently, the flow of pre-explosive fuel and pre-explosive oxidant is stopped. An exemplary volume that is filled by the pre-detonation fuel and pre-detonation oxidant is 1-40% of the volume of the combustion line, more narrowly 1-20%. Next, the main fuel and the main oxidant are charged so as to substantially fill a part (for example, 20 to 100%) of the remaining volume of the combustion line. Subsequently, the flow of main fuel and main oxidant is stopped. Pre-loading the pre-explosive fuel and pre-explosive oxidant across the main fuel / oxidant port may result in the formation of air or other non-combustible slag between the pre-explosive charge and the main charge Almost disappears. Such slag can interfere with the movement of the combustion surface between the two charges.

  With the charge applied, the ignition box is activated to provide a spark discharge for the igniter and a pre-detonation charge is ignited. The pre-detonation charge is selected such that the combustion has a very fast chemistry, and the initial deflagration rapidly changes to detonation within segment 84 to generate detonation waves. When such detonation waves occur, they effectively pass through the main charge, which may have a sufficiently slow chemistry in the pipeline to not detonate itself. The detonation wave travels longitudinally downstream and emerges from the downstream end 30 as a shock wave inside the furnace, typically impinging on the surface to be cleaned so as to at least loosen contamination (contaminants), Give mechanical shock. Following the detonation wave, pressurized combustion products are released from the detonation line, and the released products emerge from the downstream end 30 as a jet (such as by removal of loose material) cleaning process. Finish further. After or simultaneously with the release of such combustion products, a purge gas (eg, air from the same source supplying the main oxidant and / or nitrogen) is introduced through the purge port 100 and finally The pre-detonation line is filled with purge gas in preparation for repeating the cycle (with immediate or next regular or irregular intervals, according to manual or automatic decisions by the control and monitoring device) as well as expelling fresh combustion products. Also, the basic flow of purge gas can be maintained between fill / discharge cycles to prevent gas and particles from entering upstream from inside the furnace and to assist in cooling the detonation line. .

  In various embodiments, the internal surface reinforcement may substantially increase the internal surface area beyond the internal surface area of the substantially cylindrical and frustoconical segments. Such an enhancement may be effective in sustaining a change from deflagration to detonation or detonation waves. FIG. 4 shows an inner surface reinforcing portion provided inside one main segment 60. An exemplary reinforcement is substantially a chin spiral, but other reinforcements such as a Shechelkin spiral or a Smirnov cavity can also be used. This spiral is constituted by a spiral member 120. The exemplary member 120 is formed as a metallic element having a circular cross section with a diameter of about 8-20 mm. Other cross sections may be used. The exemplary member 120 is held apart from the interior surface of the segment by a plurality of longitudinal elements 122. This exemplary longitudinal element 122 is a rod of cross-section and material similar to member 120 and is welded to the inner surface of member 120 and associated segment 60. Such enhancements can be utilized to provide pre-detonation instead of or in addition to the techniques described above for different charges and different combustor cross-sectional areas.

  The apparatus of the present invention can be used in a wide range of applications. For example, in a typical coal-fired furnace, the apparatus of the present invention comprises a pendant or secondary superheater, a convection flow path (temporary superheater and economizer bundle), an air preheater, a selective catalyst remover (SCR) scrubber, a bug It can be applied to houses or electrostatic precipitators, economizer hoppers, ash or other thermal deposits on heat transfer surfaces or other surfaces. The applicability of the present invention also exists in other applications such as oil burning furnaces, black liquor recovery boilers, biomass boilers, waste recycling burners (garbage burners).

  Various devices operate under substantial differential pressure. For example, a positive pressure furnace has an internal pressure that is higher than the surrounding external pressure. This differential pressure limits the ability to connect or disconnect the soot blower element to the furnace during furnace operation. Thus, a valve device can be provided to connect the soot blower equipment to the furnace. FIG. 6 shows a first access line assembly 140 mounted within (or at) the wall opening of the furnace. The access line assembly 140 includes a valve assembly (valve) 142 and a seal assembly (seal) 144. In the illustrated embodiment, the access line assembly 140 has an inner (downstream) end flange 148 attached to the furnace wall and an outer (upstream) end to which the downstream mating surface 152 of the valve body 154 is secured. And a spacer line 146 having a part flange 150. The downstream surface of the body of the seal 144 is secured to the outer / upstream surface 160 of the body of the valve assembly. The valve can be manually or (hydraulic or electromechanical) between a closed arrangement (position) that closes and seals the opening of the valve body and an open arrangement in which the valve opening is at least partially open. Etc.) including an automatically movable gate 162. The seal 144 includes a seal member 164 (such as an O-ring) having one or more seal surfaces that are in sealing contact with mating surfaces of the insertion section of the combustion conduit. In the exemplary embodiment, the sealing surface is the inner annular surface 166 of the sealing member that contacts the outer annular surface of the downstream insertion conduit 170.

  In the exemplary embodiment, the insertion line has an upstream flange attached to the downstream surface 174 of the body 176 of the second valve 178. The upstream surface 180 of the body of the second valve 178 is attached to the downstream main line portion of the soot blower combustion line (eg, the most downstream segment 60 of FIG. 2). Similar to the first valve, the gate of the second valve has an open and closed arrangement to seal the insertion line against the main segment of the detonation line.

  For high temperature installations when the furnace is in operation and the first and second valves are closed, the insertion line (preferably provided as a unit with the remaining combustion lines) is located in the access line. The distal portion adjacent to and inserted downstream of the downstream end 182 passes through the seal and is sealed by the seal. In certain embodiments, no further insertion may be necessary. In this case, the valve can be opened so that the soot can be detonated. To remove the insertion line, the valve can be closed and the insertion line can be withdrawn from the seal assembly. However, in other embodiments, after the initial hermetic insertion, the first valve is opened with the second valve closed so that it passes through the first valve and selectively enters the spacer line. An insertion line can be further inserted. FIG. 7 shows the end 182 entering the interior of the furnace beyond the downstream end 190 of the spacer line. Following this, the second valve can be opened to allow operation of the sootblower. Removal can be performed by reversing this process.

  FIG. 8 shows another device having a similar insertion line and a second valve (also numbered) and a different access line assembly 200. The access line assembly 200 includes a spacer line 202 having a downstream flange 203 similar to FIG. 6 and having a seal 204 similar to FIG. 6 secured to the upstream flange 206 with no intervening or associated valve. A first valve 208 is selectively mounted at or near the downstream end of the spacer conduit. The exemplary first valve 208 is a hinged gate valve having a gate 210 and a hinge 212, the hinge 212 being in a closed configuration (direction) and an open configuration that closes / seals the downstream end of the access line. The gate is pivotably mounted so that the gate rotates about the hinge axis 214 between the two. An exemplary first operating valve operates by contact with an insertion line. In an exemplary embodiment, the insertion process causes the downstream end 182 of the insertion line to contact the upstream or back surface 216 of the gate, and the gate is opened by physical contact pressure therebetween (see FIG. 9). After which the second valve can be opened. When the insertion conduit is pulled out, the gate can be closed by spring biasing or gravity biasing when the second valve is pulled out in a closed state. In the embodiment, the downstream end 182 and the outer surface are in contact with the cam surface 218 of the protrusion 219 provided on the back surface 216.

  FIG. 10 shows another embodiment where the access line assembly is similar or identical to the first access line assembly (also numbered), but the insertion line lacks an upstream valve. Instead, a second valve 222 having a hinged gate is provided at the downstream end 224 of the insertion line. The contact between the insertion line and the access line can be as described for the first embodiment. The second valve 222 can be opened after installation (see FIG. 11) by an operating mechanism (not shown) such as a link or a cable provided in the wall of the insertion conduit.

  Although described with respect to embodiments having coaxial inner and outer surfaces, the insertion line may have other configurations (eg, directing soot blower output in a desired direction). For example, FIG. 12 shows an axis 520 that is offset (eg, 5-30 °) from an axis parallel to the axis 522 (which can be parallel to the axis / centerline 500) of the right cylindrical outer surface. The insertion part 230 which has the internal surface 232 which is a non-right columnar surface which has is shown. FIG. 18 illustrates an access conduit 240 and insert 242 with coaxial inner and outer surfaces having an axis 530 that is offset (eg, 5-45 °) from an axis perpendicular to the penetrating wall. ing.

  FIG. 13 shows an access line assembly 300 that includes a gate type access valve 302 and a spacer line 304. The spacer conduit is dimensioned to penetrate the wall opening of the container and is fixed to the valve 302 at the upstream end thereof. The body of the exemplary access valve 302 has a row of threaded blind holes 306 to secure the conduit valve (described below) to the access valve.

  FIG. 14 shows an insertion line / nozzle and line valve assembly 308. The assembly 308 includes a nozzle 310 having a double wall that is in operation in the container from upstream to downstream between the nozzle walls during operation (as described in US patent application Ser. No. 10 / 733,689). The cooling gas can be passed through. The nozzle 310 has an upstream flange 312 that is captured between the upstream and downstream halves 314, 316 of the conduit valve body during assembly (as described below). The conduit valve further includes a gate 318 and a pair of guide rails 320. A gasket 322 can seal between the upstream surface of the access valve body and the downstream surface of the conduit valve body.

  In an exemplary assembly sequence, an access valve is pre-installed on the container (eg, when the container is assembled or shut down). The remaining assembly steps can be performed at an elevated temperature (eg, during container operation). The access valve is initially closed. One or more threaded studs 330 can be threaded into holes 306 (see FIG. 13). Gasket 322 may be placed in place. The downstream halves 316 of the conduit valve body can be positioned by counterbore, which counterbore is within the counterbore to securely bolt the valve half 316 to the stud and access valve body. A nut 332 (see FIG. 15) fixed to the stud is received. The nozzle 310 can be initially attached to the gate 318, which closes the upstream end of the nozzle. The exemplary gate includes an opening 334 that is not initially aligned with the nozzle. The nozzle can be held on the gate by a mounting tool 336 provided on the upstream face of the gate and having bolts extending through the gate and into the nozzle flange 312. A threaded guide rod 338 can be mounted in a threaded hole provided in the valve half 316 at the downstream end. These guide rods pass through holes in the tool 336, and the tool 336 can be held on the guide rod by a nut 340. The nut can be gradually tightened so that the nozzle 310 enters the access valve through the valve half 316 and forms a seal with the access valve seal (not shown). The seal may be supplemented by connecting an air purge line (not shown) to a port in the valve half 316 to apply pressure between the half 316 and the nozzle. When the downstream end of the nozzle reaches the access valve gate, the access valve can be opened. The pressure applied by the air purge line helps to prevent furnace gas leakage from around the nozzle. Similarly, additional air purge lines (not shown) can be connected to ports provided in the access line body or flange to further prevent furnace gas leakage. When the nut 340 is further tightened, the nozzle 310 is guided by the rod 338 and the tool 336 and further inserted. By tightening in this manner, the gate 318 and the valve half 316 are finally brought into contact, and the downstream surface of the gate is in close contact with the upstream surface of the valve half, and is selectively sealed by a seal (not shown). Is done. Subsequently, a guide rail 320 (see FIG. 16) can be installed (eg, bolted to the downstream half 316 of the conduit valve to capture the gate 318 and prevent upstream movement of the gate). is there. The tool 336 and threaded rod 338 can then be removed. The gate 318 is held in place by the rail 320. Subsequently, the upstream half 314 of the main body of the conduit valve can be installed by means of bolts 342 (see FIG. 17), and these bolts 342 are in the threaded openings provided in the downstream half 316 around the gate. Extend to. The upstream half 314 has a threaded opening 344 through which a stud (not shown) can be inserted to secure the downstream flange of an adjacent conduit section. The remaining pipeline portions can be pre-combined as a unit with adjacent pipeline portions and may be further assembled. With the conduit fully assembled, the conduit valve can be opened (eg, by a handle 346 that moves the gate to align the opening 334 with the interior of the conduit). Decomposition can be performed by substantially reversing the process. In other embodiments, the upstream valve portion may be secured directly to the access valve, omitting the conduit valve (with or without the insertion conduit).

  While one or more embodiments of the invention have been described, various changes can be made without departing from the spirit and scope of the invention. For example, the present invention can be provided for use with various industrial equipment and various cleaning techniques. The form of a particular embodiment can be influenced by the form of existing equipment and technology. Accordingly, other embodiments are within the scope of the claims.

FIG. 3 is a perspective view of an industrial furnace provided in association with a plurality of soot blowers arranged for furnace cleaning. FIG. 2 is a side view of one soot blower of FIG. 1. It is a partial notch side view of the upstream edge part of the soot blower of FIG. FIG. 3 is a longitudinal sectional view of a main combustion segment of the soot blower of FIG. 2. FIG. 5 is an end view of the segment of FIG. 4. It is a fragmentary sectional view of the combination of the combustion pipe outlet end and the furnace access device in the initial stage. It is a fragmentary sectional view of the combination of FIG. 6 in the final stage. It is a fragmentary sectional view of the combination of the 2nd combustion-pipe exit end part and the furnace access apparatus in an initial stage. It is a fragmentary sectional view of the combination of FIG. 8 in the final stage. It is a fragmentary sectional view of the combination of the 3rd combustion-pipe exit end part and the furnace access apparatus in an initial stage. It is a fragmentary sectional view of the combination of FIG. 10 in the final stage. It is a fragmentary sectional view of the combination of the 4th combustion-pipe exit end part and the furnace access apparatus in the last stage. It is explanatory drawing of the 5th access apparatus. It is a decomposition explanatory view showing the partial section of the 5th combustion pipe outlet end part. FIG. 15 is a perspective view of the access device of FIG. 13 and the conduit outlet end of FIG. 14 in a first intermediate stage of assembly. FIG. 16 is a perspective view showing the access device and outlet end of FIG. 15 in a second intermediate stage of assembly. FIG. 16 is a perspective view showing the access device and the combustion pipe outlet end portion of FIG. 15 in the final stage of assembly. It is a fragmentary sectional view of the combination of a 6th pipe line exit end part and the access apparatus of a furnace.

Explanation of symbols

DESCRIPTION OF SYMBOLS 140 ... 1st access line assembly 142 ... Valve assembly 144 ... Seal assembly 146 ... Spacer line 148 ... Inner end flange 150 ... Outer end flange 152 ... Downstream mating surface 154 ... Valve body 160 ... Outer surface of main body 162 ... Gate 164 ... Sealing member 166 ... Inner annular surface 170 ... Downstream insertion pipe 174 ... Downstream surface 176 ... Main body of second valve 178 ... Second valve 180 ... Upstream surface

Claims (16)

A device for providing detonation cleaning communication through a container wall,
A first conduit extending from the container wall;
A first valve having an open state and a closed state allowing communication of the first conduit;
A second conduit having an insertion portion dimensioned to be received in the receiving portion of the first conduit;
An apparatus for providing detonation cleaning communication, comprising: a second valve having an open state and a closed state enabling communication of the second pipe line.   2. The apparatus for providing detonation cleaning communication according to claim 1, wherein the first valve and the second valve are sliding gate valves. One of the first valve and the second valve is a sliding gate valve,
2. The apparatus for providing detonation cleaning communication according to claim 1, wherein the other of the first valve and the second valve is a hinged gate valve. One of the first valve and the second valve is a manually or mechanically driven valve;
2. The apparatus for providing detonation cleaning communication according to claim 1, wherein the other of the first valve and the second valve is a manual or mechanically driven valve.   2. The apparatus according to claim 1, further comprising means for sealing the first pipe line with respect to the second pipe line over a first range in which the second pipe line is inserted into the first pipe line. Equipment providing communication for detonation cleaning as described.   The apparatus for providing detonation cleaning communication according to claim 1, wherein the second conduit has an inner surface that is off-axis with respect to the outer surface. A device for providing detonation cleaning communication through a container wall,
A pipe line defining a flow path penetrating the container wall;
An apparatus for providing detonation cleaning communication, comprising: a valve provided along the flow path and having an open state and a closed state. A fuel and oxidant source coupled to the conduit;
The apparatus for providing detonation cleaning communication according to claim 7, further comprising means for igniting the fuel and oxidant charges.   8. The apparatus for providing detonation cleaning communication according to claim 7, wherein the valve is fixed to the wall and is provided along a downstream half of the flow path. The valve is a first valve provided at the upstream end of the access pipeline,
The apparatus includes a second valve along the conduit, the second valve upstream of the first valve and upstream of an insertion portion of the conduit inserted into the access conduit. 8. An apparatus for providing detonation cleaning communication according to claim 7, wherein said apparatus is provided. The valve is a first valve provided between a main part of the pipe line and a downstream insertion part of the pipe line,
The apparatus for providing detonation cleaning communication according to claim 7, wherein the apparatus includes a second valve at an upstream end of an access line that receives the insert. A cleaning method for a container having a wall and an access line sealed by a first valve in an initial state,
Inserting the insertion portion of the combustion line having the second valve into the access line;
Forming a seal between the access line and the combustion line;
Open the first valve,
Open the second valve,
Passing combustion gas through the combustion line and into the vessel;
A method for cleaning a container, comprising: pulling out the insertion portion from the access conduit.   13. The container cleaning method according to claim 12, wherein the first valve is opened at an intermediate stage of the insertion.   The container cleaning method according to claim 12, further comprising forming a seal between the combustion line and the access line.   15. The container cleaning method according to claim 14, wherein the formation of the seal is performed before the first valve is opened. Opening one of the first valve and the second valve includes pivoting the gate of said one valve;
The container cleaning method according to claim 12, wherein the other of the valves is manually opened.

Images