CN214950855U - Clear stifled subassembly and novel clear stifled device of rotary air heater - Google Patents
Clear stifled subassembly and novel clear stifled device of rotary air heater Download PDFInfo
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- CN214950855U CN214950855U CN202120877763.XU CN202120877763U CN214950855U CN 214950855 U CN214950855 U CN 214950855U CN 202120877763 U CN202120877763 U CN 202120877763U CN 214950855 U CN214950855 U CN 214950855U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
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Abstract
Clear stifled subassembly and novel rotary air heater clear stifled device, it relates to rotary air heater technical field. The utility model provides a fixed connection nozzle of the clear stifled equipment of current rotation air preheater exist can't solve the heating and sweep the time and reduce the contradiction between the flue resistance, and the hot-blast requirement that can't reach high temperature high pressure of circulation that comes from hot primary air, and single portable shower nozzle exists effective area less that sweeps, the lower problem of work efficiency. The utility model discloses a rotary driving device installs on the direction subassembly, and N shower nozzle up and rotate sealing installation in intake pipe one end, and intake pipe slidable mounting is on the direction subassembly, and along with the intake pipe is left or when moving right along rotary air heater radial direction, N shower nozzle is tangent with place rotary air heater heat exchange element's excircle constantly under rotary driving device's drive. The utility model is used for improve high temperature high pressure steam and effectively sweep the area to rotation air preheater cold junction heating element.
Description
Technical Field
The utility model relates to a rotary air heater technical field, concretely relates to clear stifled subassembly and novel rotary air heater are clear stifled device.
Background
A thermal power generation boiler has a denitration device (SCR) installed in a flue thereof. The denitration device (SCR) is arranged at the upstream of the rotary air preheater, the process principle is that ammonia reacts with nitrogen oxides in flue gas to remove the nitrogen oxides in the flue gas, the ammonia escapes unavoidably in the running process of the denitration device (SCR), the escaped ammonia reacts with sulfur dioxide in the flue gas to generate ammonium bisulfate, and the substance has the characteristics of high dew point temperature, high viscosity and strong corrosivity. When the ammonium bisulfate flows to the cold end of the downstream rotary air preheater along with the flue gas, the temperature is usually lower than the dew point temperature, so that the ammonium bisulfate is condensed and is attached to the surface of a heat exchange element of the rotary air preheater, and fly ash in the flue gas is bonded, and finally the flue gas and the air channel at the cold end of the rotary air preheater are blocked, so that the resistance of the rotary air preheater is increased, and the resistance is up to more than 3KPa in serious cases, thereby increasing the air leakage and the power consumption of a fan, reducing the temperature and the heat exchange quantity of the heat exchange element of the rotary air preheater, stalling the fan, insufficient air supply of the boiler, even forced load reduction operation, and forced shutdown in serious cases, thereby affecting the normal operation of a unit. Therefore, the problems of clogging of heat exchange elements and serious corrosion of the heat exchange elements exist in the conventional rotary air preheater.
The invention discloses an anti-blocking hot air recirculation system for an air preheater, which is disclosed by the invention with the publication number of CN112555889A, wherein a path of circulating hot air is led out from a hot primary air pipeline at the outlet of the air preheater and is sent into a fan-shaped plate between primary air and secondary air at the cold end of the air preheater, holes are formed in the fan-shaped plate, the circulating hot air passes through a heat exchange element at a high speed by utilizing the differential pressure of the primary air and the secondary air, the heat exchange element is heated again, the condensation of ammonium bisulfate is reduced, and the circulating hot air finally reaches the secondary air. By improving the hot air circulation structure of the air preheater of the boiler, the temperature of the metal wall of the cold section of the heat exchange element of the air preheater is improved, and finally, the reduction or the avoidance of ammonia caused by upstream equipment is achievedSlip-generated NH4HSO4Deposition is carried out, so that the blockage of the heat exchange element of the air preheater is relieved or avoided, and the problem of blockage of the air preheater is solved. However, the anti-blocking hot air recirculation system for the air preheater has at least the following two problems: firstly, the connecting nozzle adopts a fixed structure, the air outlet of the circulating air duct is connected with the connecting nozzle, and the connecting nozzle needs to completely cover a fan-shaped plate between secondary air at the cold end of the air preheater in order to enable circulating hot air to pass through the whole heat exchange element at a high speed. In order to avoid increasing the smoke resistance, the excessive occupied flue area is not allowed, the heating and purging area of the connecting nozzle is forced to be incapable of covering more fan-shaped plates, so that the length of the connecting nozzle in the circumferential direction of the air preheater is limited, the heating and purging time and the heating and purging efficiency of the heat exchange element cannot be ensured, and the blockage removing effect is poor. And secondly, circulating hot air is led out from a hot primary air pipeline at the outlet of the air preheater, the circulating hot air passes through the heat exchange element at a high speed by utilizing the differential pressure of primary air and secondary air, a fan is not added, and recirculation is realized completely by relying on the differential pressure of the primary air and the secondary air, so that the pressure of the circulating hot air is lower, high-temperature and high-pressure steam cannot be generated, and the problem of blockage of the air preheater cannot be solved.
The utility model discloses application number is 202120323260.8's utility model discloses a "clear stifled device of rotary air heater", this utility model sets up the shower nozzle import at rotary air heater shell cold junction lateral wall for the shower nozzle can follow the shower nozzle import and get into rotary air heater cold junction, and follow the radial direction of rotary air heater and do left right reciprocating motion, heat rotary air heater cold junction heat exchange element and sweep. Under the condition of not increasing the smoke resistance, the length of a heating and purging area of the spray head in the circumferential direction of the air preheater is greatly increased, and the heating time is increased by more than two times. However, the blockage removing device for the rotary air preheater has the following problems: the spray head is of an integral structure, when the spray head moves leftwards or rightwards along the radial direction of the rotary air preheater, only one tangent point can be formed between a single spray head and the excircle of the heat exchange element of the rotary air preheater, the effective purging area in unit time is small, and the working efficiency is low.
In summary, the fixed connection nozzle of the existing rotary air preheater blockage removing equipment cannot solve the contradiction between the heating and purging time and the reduction of the flue resistance, and the circulating hot air from the hot primary air cannot meet the requirements of high temperature and high pressure, while the single movable nozzle has the problems of small effective purging area and low working efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the fixed connection nozzle of the clear stifled equipment of current rotation air preheater and having the contradiction between unable solution heating purging time and the reduction flue resistance, and the hot-blast circulating air who comes from hot primary air can't reach the highly compressed requirement of high temperature, and single portable shower nozzle has the effective area of purging less, the lower problem of work efficiency, and then provides the clear stifled device of stifled subassembly and novel rotation air preheater.
The technical scheme of the utility model is that:
a blockage clearing assembly comprises a guide assembly 35, an air inlet pipe 31, a rotary driving device 34 and N nozzles, wherein N is larger than or equal to 2 and is a positive integer, the guide assembly 35 is horizontally arranged below a cold-end heating element of a rotary air preheater, the rotary driving device 34 is installed on the guide assembly 35, nozzles of the N nozzles face upwards and are installed at one end of the air inlet pipe 31 in a rotating and sealing mode, and the air inlet pipe 31 is installed on the guide assembly 35 in a sliding mode to achieve driven translational motion.
Further, when the number N of the nozzles is odd, one of the nozzles is horizontally and fixedly installed on the air inlet pipe 31 to form a fixed nozzle, and the other nozzles are symmetrically and rotatably installed on the outer side of the fixed nozzle;
when the number N of the nozzles is an even number, the N nozzles are symmetrically and rotationally mounted on the air inlet pipe 31 around the rotor of the rotary air preheater;
when the air inlet pipe 31 moves leftwards or rightwards along the radial direction of the rotary air preheater, the N nozzles are constantly tangent to the excircle of the heat exchange element of the rotary air preheater under the driving of the rotary driving device 34.
Further, the rotation driving device 34 includes at least one pair of guiding curved grooves 341 and a plurality of driving brackets 342, the at least one pair of guiding curved grooves 341 is installed on the guiding assembly 35, one end of each driving bracket 342 is slidably installed in one guiding curved groove 341, the other end of each driving bracket 342 is fixedly connected with one nozzle, and as the air inlet pipe 31 moves leftwards or rightwards along the radial direction of the rotary air preheater, each driving bracket 342 drives the corresponding nozzle to rotate under the guiding action of the corresponding guiding curved groove 341, so that the nozzle is constantly tangent to the outer circle of the heat exchange element of the rotary air preheater.
Furthermore, a plurality of blowing holes are formed in the upper end face of each spray head in the vertical direction, the plurality of blowing holes in the upper end face of each spray head and the cold end of the heat exchange element of the rotary air preheater are arranged in an arc-shaped and continuous mode in a vertical state, and a heating blowing area is formed in the upper end face of each spray head.
Furthermore, the heating and blowing area comprises M rows of arc-shaped blowing hole units, M is more than or equal to 2 and is a positive integer, and each row of arc-shaped blowing hole units comprises a plurality of arc-shaped blowing holes which are continuously arranged in an arc shape.
Further, the shape of the spray head is an arc hollow structure or an arc tube bank structure.
Further, it also includes a plurality of nozzles 36, one nozzle 36 being detachably mounted on each purge hole.
Further, the nozzles 36 are disposed in a vertical orientation with the cold end of the heat exchange elements of the rotary air preheater facing upward.
Further, the guiding assembly 35 includes a traveling unit, a supporting roller supporting assembly and two guide rail units, the two guide rail units are horizontally installed on the rotary air preheater, the supporting roller supporting assembly is installed between the two guide rail units, the traveling unit is slidably installed on the two guide rail units, and the traveling unit is installed at the bottom of the air inlet pipe 31.
The utility model provides an use clear stifled device of novel rotary air heater of stifled subassembly, it includes containing box 1, containing box 1 sets up on 2 cold junction lateral walls of rotary air heater's shell, its characterized in that: the device further comprises a blockage clearing assembly, wherein the blockage clearing assembly is arranged below the cold-end heating element, one end of a guide assembly 35 in the blockage clearing assembly is fixedly connected with a truss 4 of the rotary air preheater, the other end of the guide assembly 35 is fixedly connected with the inner wall of the storage box 1, and a spray head in the blockage clearing assembly is arranged in the storage box 1.
Compared with the prior art, the utility model has the following effect:
1. the utility model discloses a compare with the name is that air preheater prevents blockking up hot-blast recirculation system, the invention application that publication number is CN112555889A, the utility model discloses a novel rotary air preheater is clear stifled device designs into portable shower nozzle with the shower nozzle, sets up the shower nozzle import at rotary air preheater shell cold junction lateral wall for shower nozzle an 32 and shower nozzle b33 can follow the shower nozzle import and get into rotary air preheater cold junction to reciprocating motion about being along rotary air preheater radial direction, heat rotary air preheater cold junction heat transfer element and sweep. Under the condition of not increasing the smoke resistance, the length of a heating and purging area of the spray head in the circumferential direction of the air preheater is greatly increased, and the heating time and the heating efficiency of high-temperature and high-pressure steam on a cold-end heat exchange element of the rotary air preheater are effectively increased. The high-temperature high-pressure medium is sprayed out from the heating and purging areas on the spray head a32 and the spray head b33 through the T-shaped air inlet pipe, the cold-end heat exchange element of the rotor of the rotary air preheater is heated for a long time, so that the temperature of the cold-end heat exchange element of the rotor reaches above the vaporization point of the ammonium bisulfate, the ammonium bisulfate condensed on the cold-end heat exchange element of the rotor is vaporized, and the ammonium bisulfate and the ash on the cold-end heat exchange element of the rotor are purged together to fall, and therefore the problems of clogging and serious corrosion of the heat exchange element of the rotary air preheater are thoroughly solved.
2. Compared with the utility model with the name of a rotary air preheater blockage removing device and the utility model with application number 202120323260.8, the novel rotary air preheater blockage removing device of the utility model designs the spray head into a split type spray head (namely the spray head a32 and the spray head b33), the upper parts of the a end 311 and the b end 312 of the T-shaped air inlet pipe are respectively provided with the spray head a32 and the spray head b33 in a rotatable and sealed way, the rotary driving device 34 is arranged between the guide component 35 and the spray head a32 and the spray head b33, when the T-shaped air inlet pipe moves leftwards or rightwards along the radial direction of the rotary air preheater, the two L-shaped driving brackets 342 drive the spray head a32 and the spray head b33 to rotate around the rotary joint a and the rotary joint b under the guiding action of the two guiding curved grooves 341, so that the spray head a32 and the spray head b33 are tangential to the excircle of the heat exchange element of the rotary air preheater. The effective blowing area of the nozzle is effectively increased in unit time, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural view of the novel rotary air preheater blockage removal device of the present invention;
FIG. 2 is an isometric view of the novel rotary air preheater blockage removal device of the present invention;
FIG. 3 is a schematic view (II) of the working state of the novel rotary air preheater blockage removing device of the present invention;
FIG. 4 is a second working state axonometric view of the novel rotary air preheater blockage removal device of the utility model;
FIG. 5 is a top view of the novel rotary air preheater blockage removal device of the present invention in an operating state;
fig. 6 is an assembly diagram (one) of the novel rotary air preheater block cleaning device and the truss 4 of the invention;
fig. 7 is an assembly diagram (a) of the novel rotary air preheater blockage removing device and the truss 4 of the invention.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 and fig. 2, and the blockage clearing assembly of the embodiment includes a guide assembly 35, an air inlet pipe 31, a rotary driving device 34 and N nozzles, where N is greater than or equal to 10 and greater than or equal to 2, and N is a positive integer, the guide assembly 35 is horizontally disposed below a cold-end heating element of the rotary air preheater, the rotary driving device 34 is mounted on the guide assembly 35, the N nozzles of the nozzles face upward and are rotatably and sealingly mounted at one end of the air inlet pipe 31, and the air inlet pipe 31 is slidably mounted on the guide assembly 35 to realize translational motion under driving.
The second embodiment is as follows: referring to fig. 1 and 2, the embodiment is described, in which when the number N of the nozzles is odd, one of the nozzles is horizontally and fixedly installed on the air inlet pipe 31 to form a fixed nozzle, and the other nozzles are symmetrically and rotatably installed outside the fixed nozzle;
when the number N of the nozzles is an even number, the N nozzles are symmetrically and rotationally mounted on the air inlet pipe 31 around the rotor of the rotary air preheater;
when the air inlet pipe 31 moves leftwards or rightwards along the radial direction of the rotary air preheater, the N nozzles are constantly tangent to the excircle of the heat exchange element of the rotary air preheater under the driving of the rotary driving device 34.
The air inlet pipe 31 of the present embodiment is a T-shaped air inlet pipe, the number of the nozzles is two, and the nozzles are respectively a nozzle a32 and a nozzle b33, the upper end surfaces of the nozzle a32 and the nozzle b33 are both provided with a plurality of purge holes along the vertical direction, and the nozzle a32 and the nozzle b33 are respectively connected with the upper parts of the a end 311 and the b end 312 of the T-shaped air inlet pipe in a rotating and sealing manner.
The embodiment further comprises a rotary joint a and a rotary joint b, the upper parts of the end a 311 and the end b 312 of the T-shaped air inlet pipe are respectively provided with a nozzle assembly hole a and a nozzle assembly hole b, and the nozzle a32 and the nozzle b33 are respectively in rotary sealing connection with the nozzle assembly hole a and the nozzle assembly hole b through the rotary joint a and the rotary joint b. When the T-shaped air inlet pipe moves leftwards or rightwards along the radial direction of the rotary air preheater, the rotary driving device 34 drives the spray head a32 and the spray head b33 to rotate around the rotary joint a and the rotary joint b, so that the spray head a32 and the spray head b33 are tangent to the excircle of the heat exchange element of the rotary air preheater. The effective blowing area of the nozzle is effectively increased in unit time, and the working efficiency is greatly improved.
Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: referring to fig. 1 and 2, the rotary driving device 34 of the present embodiment includes at least one pair of guiding curved grooves 341 and a plurality of driving brackets 342, the at least one pair of guiding curved grooves 341 is installed on the guiding assembly 35, one end of each driving bracket 342 is slidably installed in one guiding curved groove 341, the other end of each driving bracket 342 is fixedly connected with one nozzle, and as the air inlet pipe 31 moves leftwards or rightwards along the radial direction of the rotary air preheater, each driving bracket 342 drives the corresponding nozzle to rotate under the guiding action of the corresponding guiding curved groove 341, so that the nozzle is tangential to the outer circle of the heat exchange element of the rotary air preheater.
The utility model discloses a drive support 342 is L type drive support, and L type drive support's vertical section slidable mounting is in a direction curved groove 341, L type drive support's horizontal segment and a shower nozzle fixed connection. With the arrangement, when the T-shaped air inlet pipe moves leftwards or rightwards along the radial direction of the rotary air preheater, the L-shaped driving bracket 342 drives the spray head to rotate under the guiding action of the guiding curved groove 341, so that the spray head is tangent to the excircle of the heat exchange element of the rotary air preheater. The effective blowing area of the nozzle is effectively increased in unit time, and the working efficiency is greatly improved.
Other compositions and connections are the same as in the first or second embodiments.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, the upper end surface of each spray head of the embodiment is provided with a plurality of purge holes along the vertical direction, the purge holes on the upper end surface of the spray head and the cold end of the heat exchange element of the rotary air preheater are arranged in an arc-shaped continuous manner in a vertical state, and a heating purge zone is formed on the upper end surface of the spray head. So set up, make rotor cold junction heat transfer component temperature reach more than the ammonium bisulfate vaporization point, will condense the ammonium bisulfate vaporization on rotor cold junction heat transfer component to together sweep together with the ash on the rotor cold junction heat transfer component and drop.
Other compositions and connection relationships are the same as in the first, second or third embodiment.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, the heating and purging area of the embodiment includes M rows of arc-shaped purging hole units, M is greater than or equal to 2, and M is a positive integer, and each row of arc-shaped purging hole units includes a plurality of arc-shaped purging holes which are continuously arranged in an arc shape.
Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 and 2, and the shape of the spray head of the present embodiment is an arc-shaped hollow structure or an arc-shaped tube row structure. With the arrangement, when the spray head a32 and the spray head b33 are arc-shaped hollow structures, M rows of arc-shaped blowing hole units are arranged side by side on the upper end surface of the arc-shaped hollow structures; when the spray head a32 and the spray head b33 are arc-shaped tube bank structures, the arc-shaped tube bank structures are formed by connecting M arc-shaped tubes which are arranged side by side in parallel, and M rows of arc-shaped blowing hole units are respectively arranged on the upper end surfaces of the M arc-shaped tubes.
Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.
The seventh embodiment: the embodiment is described with reference to fig. 1 and 2, and the embodiment further includes a plurality of nozzles 36, and one nozzle 36 is detachably mounted on each purge hole. So set up, the quantity of nozzle 36 is unanimous with the quantity of purge hole, and a plurality of nozzle 36 is demountable installation respectively on a plurality of purge hole, and nozzle 36 is the vertical state setting with rotary air preheater heat exchange element cold junction upwards. By lengthening the length of the heating and purging area in the circumferential direction, when the heat exchange element between every two adjacent sector plates on the rotor does circular motion, after passing through the heating and purging area every time, the temperature of the heat exchange element at the cold end of the rotor reaches above the vaporization point of the ammonium bisulfate, and the ammonium bisulfate condensed on the heat exchange element at the cold end of the rotor is vaporized.
Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.
The specific implementation mode is eight: referring to the embodiment described with reference to fig. 1 and 2, the nozzles 36 of the embodiment are disposed in a vertical orientation with respect to the cold end of the heat exchange elements of the rotary air preheater. According to the arrangement, high-temperature and high-pressure media are vertically sprayed upwards from heating and purging areas on the spray head a32 and the spray head b33 through the T-shaped air inlet pipe, and the heat exchange element at the cold end of the rotor of the rotary air preheater is heated for a long time. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.
The specific implementation method nine: referring to fig. 1 and 2, the guide assembly 35 of the present embodiment includes a traveling unit, a supporting roller support assembly and two guide rail units, the two guide rail units are horizontally installed on the rotary air preheater, the supporting roller support assembly is installed between the two guide rail units, the traveling unit is slidably installed on the two guide rail units, and the traveling unit is installed at the bottom of the air inlet pipe 31.
The riding wheel supporting assembly of this embodiment includes a plurality of riding wheel units 351 and a plurality of crossbeam 352, evenly be fixed with a plurality of crossbeams 352 along its length direction from left to right in proper order in two guide rail unit bottoms, a plurality of riding wheel units 351 are installed respectively at the up end middle part of a plurality of crossbeams 352, every riding wheel unit 351 includes gyro wheel and two layer boards, two vertical relatively fixed up end at corresponding crossbeam 352 of layer board, two relative shaft holes are seted up on two layer board upper portions, the pivot both ends of gyro wheel rotate with two layer boards respectively and are connected, the gyro wheel is located under the standpipe of T type intake pipe, and the standpipe roll connection of gyro wheel and T type intake pipe. So set up, riding wheel supporting component plays the effect of roll support to T type intake pipe and shower nozzle a32 and shower nozzle b33 of installing in T type intake pipe, when T type intake pipe is left or right motion along rotary air heater radial direction on two guide rail units, roll cooperation between the gyro wheel of a plurality of riding wheel units 351 and the outer face of cylinder of T type intake pipe, when not increasing the frictional resistance that T type intake pipe is straight reciprocating motion, the stability of T type intake pipe has been increased.
The traveling unit of the embodiment comprises an axle 51, two hoops 52 and two traveling wheels 53, wherein the axle 51 is horizontally arranged at the bottom of the transverse pipe of the T-shaped air inlet pipe along the width direction of the spray head a32 and the spray head b33, the axle 51 is fixedly connected with the transverse pipe of the T-shaped air inlet pipe through the two hoops 52, and the two traveling wheels 53 are respectively vertically arranged at two sides of the transverse pipe of the T-shaped air inlet pipe and can be respectively and rotatably arranged at two ends of the axle 51. So set up, the walking unit is wheeled structure, and two walking wheels 53 respectively with the guide rail unit roll cooperation, have reduced the frictional resistance between walking wheel 53 and the guide rail unit.
Each guide rail unit comprises a rail 61 and a rail support 62, the rail support 62 is of an I-shaped steel structure, the rail support 62 is located under the corresponding travelling wheel 53, two ends of the rail support 62 are fixedly connected with the truss 4 and the containing box 1 of the rotary air preheater respectively, the rail 61 is of a round steel structure, the rail 61 is located between the travelling wheel 53 and the rail support 62 and is arranged in parallel with the rail support 62, the lower portion of the rail 61 is fixedly connected with the upper end face of the rail support 62, and the upper portion of the rail 61 is in rolling connection with the corresponding travelling wheel 53. With the arrangement, when the rotary air preheater advances, the T-shaped air inlet pipe moves forwards from the outer side of the rotary air preheater to the center of the rotary air preheater along the track 61 through the bottom travelling wheel 53 to be gradually heated and purged.
Other compositions and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth, seventh or eighth embodiment.
The detailed implementation mode is ten: the embodiment is described with reference to fig. 1 to fig. 7, and the novel rotary air preheater blockage removing device using the blockage removing assembly of the embodiment includes a storage box 1, the storage box 1 is disposed on a cold end side wall of a housing 2 of the rotary air preheater, and is characterized in that: the device further comprises a blockage clearing assembly, wherein the blockage clearing assembly is arranged below the cold-end heating element, one end of a guide assembly 35 in the blockage clearing assembly is fixedly connected with a truss 4 of the rotary air preheater, the other end of the guide assembly 35 is fixedly connected with the inner wall of the storage box 1, and a spray head in the blockage clearing assembly is arranged in the storage box 1. With the arrangement, the blockage cleaning device directly moves backwards into the storage box 1 of the rotary air preheater after the heating and purging are completed.
In the embodiment, a nozzle inlet is formed in the side wall of the cold end of the shell 2 of the rotary air preheater, and the storage box 1 is arranged at the nozzle inlet outside the shell 2 and is fixedly connected with the shell 2 in a sealing manner. The air inlet pipe 31 of the blockage removing assembly is a T-shaped air inlet pipe, the number of the spray heads is two, the spray heads are respectively a spray head a32 and a spray head b33, the upper end faces of the spray head a32 and the spray head b33 are respectively provided with a plurality of blowing holes along the vertical direction, and the spray head a32 and the spray head b33 are respectively connected with the upper portions of an end a 311 and an end b 312 of the T-shaped air inlet pipe in a rotating and sealing mode. An air pipe through hole is formed in the center of the rear side wall of the containing box 1, and the c end 313 of the T-shaped air inlet pipe penetrates through the air pipe through hole and is connected with the rear side wall of the containing box 1 in a sliding and sealing mode.
Other compositions and connections are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiments.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Principle of operation
The working principle of the novel rotary air preheater blockage removing device of the present invention is described with reference to fig. 1 to 7: the novel blockage cleaning device for the rotary air preheater cleans blockage when the rotary air preheater normally operates. The blockage removing device for the rotary air preheater can be controlled locally or remotely, and when the T-shaped air inlet pipe moves leftwards or rightwards along the radial direction of the rotary air preheater, the two L-shaped driving brackets 342 drive the spray head a32 and the spray head b33 to rotate by taking the rotary joint a and the rotary joint b as centers under the guiding action of the two guiding curved grooves 341, so that the spray head a32 and the spray head b33 are tangent to the excircle of the heat exchange element of the rotary air preheater. The effective blowing area of the nozzle is effectively increased in unit time, and the working efficiency is greatly improved. The high-temperature high-pressure medium is sprayed out from the nozzles 36 on the spray head a32 and the spray head b33 through the T-shaped air inlet pipe, the cold-end heat exchange element of the rotor of the rotary air preheater is heated for a long time, so that the temperature of the cold-end heat exchange element of the rotor reaches above the vaporization point of the ammonium bisulfate, the ammonium bisulfate condensed on the cold-end heat exchange element of the rotor is vaporized, and the ammonium bisulfate and the ash on the cold-end heat exchange element of the rotor are blown and dropped together, thereby thoroughly solving the problems of clogging and serious corrosion of the heat exchange element of the rotary air preheater.
The blockage removing component 3 adopts a forward intermittent type mode, a backward direct-acting mode or an intermittent type mode, when the blockage removing component 3 moves forwards, a spray head a32 and a spray head b33 provided with a plurality of nozzles 36 move forwards along a track 61 from the outer side of the rotary air preheater to the center of the rotary air preheater through a bottom travelling wheel 53 to perform gradual heating and purging, the movement is stopped when the blockage removing component 3 moves forwards by the width distance of one spray head a32 and one spray head b33, and one or more times of annular heating and purging are performed on a cold-end heat exchange element of the rotary air preheater, so that each area can be effectively heated and purged. After heating and purging are completed, the blockage removing component 3 retreats to the position in the storage box 1 of the rotary air preheater.
Claims (10)
1. A clear stifled subassembly which characterized in that: the novel rotary air preheater comprises a guide assembly (35), an air inlet pipe (31) and a rotary driving device (34), N spray heads, wherein N is more than or equal to 2, N is a positive integer, the guide assembly (35) is horizontally arranged below a cold-end heating element of the rotary air preheater, the rotary driving device (34) is arranged on the guide assembly (35), N spray head nozzles face upwards and are rotatably and hermetically arranged at one end of the air inlet pipe (31), and the air inlet pipe (31) is slidably arranged on the guide assembly (35) to realize translational motion under driving.
2. A block clearing assembly according to claim 1, wherein: when the number N of the spray heads is odd, one spray head is horizontally and fixedly arranged on the air inlet pipe (31) to form a fixed spray head, and the other spray heads are symmetrically and rotatably arranged on the outer side of the fixed spray head;
when the number N of the spray heads is even, the N spray heads are symmetrically and rotatably arranged on the air inlet pipe (31) by taking a rotor of the rotary air preheater as a center;
when the air inlet pipe (31) moves leftwards or rightwards along the radial direction of the rotary air preheater, the N spray heads are tangent to the excircle of the heat exchange element of the rotary air preheater at any moment under the driving of the rotary driving device (34).
3. A block clearing assembly according to claim 1 or 2, wherein: the rotary driving device (34) comprises at least one pair of guide curved grooves (341) and a plurality of driving supports (342), the at least one pair of guide curved grooves (341) are installed on the guide assembly (35), one end of each driving support (342) is installed in one guide curved groove (341) in a sliding mode, the other end of each driving support (342) is fixedly connected with one spray head, and when the air inlet pipe (31) moves leftwards or rightwards along the radial direction of the rotary air preheater, each driving support (342) drives the corresponding spray head to rotate under the guide effect of the corresponding guide curved groove (341), so that the spray head is tangent to the excircle of the heat exchange element of the rotary air preheater at the moment.
4. A block clearing assembly according to claim 3, wherein: a plurality of blowing holes are formed in the upper end face of each spray head in the vertical direction, the plurality of blowing holes in the upper end face of each spray head and the cold end of the heat exchange element of the rotary air preheater are arranged in an arc-shaped and vertical mode, and a heating blowing area is formed in the upper end face of each spray head.
5. A block clearing assembly according to claim 4, wherein: the heating and blowing area comprises M rows of arc-shaped blowing hole units, M is more than or equal to 2 and is a positive integer, and each row of arc-shaped blowing hole units comprises a plurality of arc-shaped blowing holes which are continuously arranged in an arc shape.
6. A block clearing assembly according to claim 5, wherein: the shape of the spray head is an arc hollow structure or an arc tube bank structure.
7. A block clearing assembly according to claim 4, 5 or 6, wherein: it also includes a plurality of nozzles (36), each blow-off hole is detachably mounted with a nozzle (36).
8. A block clearing assembly according to claim 7, wherein: the nozzle (36) is arranged in a vertical state with the cold end of the heat exchange element of the rotary air preheater facing upwards.
9. A block clearing assembly according to claim 1 or 8, wherein: the guide assembly (35) comprises a walking unit, a riding wheel supporting assembly and two guide rail units, the two guide rail units are horizontally arranged on the rotary air preheater, the riding wheel supporting assembly is arranged between the two guide rail units, the walking unit is slidably arranged on the two guide rail units, and the walking unit is arranged at the bottom of the air inlet pipe (31).
10. A novel rotary air preheater blockage removing device using a blockage removing assembly as claimed in any one of claims 1 to 9, wherein: it includes containing box (1), and containing box (1) sets up on rotary air heater's shell (2) cold junction lateral wall, its characterized in that: the device is characterized by further comprising a blockage clearing assembly, wherein the blockage clearing assembly is arranged below the cold-end heating element, one end of a guide assembly (35) in the blockage clearing assembly is fixedly connected with a truss (4) of the rotary air preheater, the other end of the guide assembly (35) is fixedly connected with the inner wall of the storage box (1), and a spray head in the blockage clearing assembly is arranged in the storage box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120877763.XU CN214950855U (en) | 2021-04-26 | 2021-04-26 | Clear stifled subassembly and novel clear stifled device of rotary air heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120877763.XU CN214950855U (en) | 2021-04-26 | 2021-04-26 | Clear stifled subassembly and novel clear stifled device of rotary air heater |
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| Publication Number | Publication Date |
|---|---|
| CN214950855U true CN214950855U (en) | 2021-11-30 |
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|---|---|---|---|
| CN202120877763.XU Active CN214950855U (en) | 2021-04-26 | 2021-04-26 | Clear stifled subassembly and novel clear stifled device of rotary air heater |
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| Country | Link |
|---|---|
| CN (1) | CN214950855U (en) |
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2021
- 2021-04-26 CN CN202120877763.XU patent/CN214950855U/en active Active
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