CN212006782U - Horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by steel brush - Google Patents
Horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by steel brush Download PDFInfo
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- CN212006782U CN212006782U CN202020560532.1U CN202020560532U CN212006782U CN 212006782 U CN212006782 U CN 212006782U CN 202020560532 U CN202020560532 U CN 202020560532U CN 212006782 U CN212006782 U CN 212006782U
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Abstract
The utility model discloses a hot stove exhaust-heat boiler in horizontal machinery steel brush deashing form ore deposit, horizontal machinery steel brush deashing form ore deposit hot stove exhaust-heat boiler includes horizontal steel construction frame, horizontal module, horizontal steel construction frame is as hot stove exhaust-heat boiler's in ore deposit shell, horizontal module sets up inside horizontal steel construction frame for the energy of conversion boiler waste heat has ash removal device wherein, is used for the reciprocal clearance of vertical direction boiler heat exchanger tube bank surface deposition. The utility model discloses a boiler bottom adopts the embedded locating beam's of U type elbow cooperation locate mode, further improves hot stove exhaust-heat boiler's in ore deposit operational life, and then reaches technical effect such as clean efficient, long service life, installation dismantlement convenience.
Description
Technical Field
The utility model belongs to the technical field of the hot stove exhaust-heat boiler in ore deposit's technique and specifically relates to a horizontal natural circulation hot stove exhaust-heat boiler in ore deposit of steel brush deashing.
Background
The submerged arc furnace smelting belongs to the high energy consumption industry, the average electricity consumption for producing one ton of industrial silicon is 13000kwh, and the electricity consumption for producing about 200 ten thousand tons of industrial silicon every year in China is more than 26 hundred million kwh. The power generation by utilizing the waste heat of the submerged arc furnace is an energy-saving technology which is actively encouraged by the state to be widely popularized, and the technology not only saves energy, but also is more beneficial to environmental protection. Therefore, the submerged arc furnace of the industry modification and new construction project is continuously developing into the current main trend towards the waste heat utilization and clean combustion of the boiler. If the waste heat power generation technology is adopted, the electric power recovery rate of the industry is about 25%, the electric energy recovered by the industry can reach 6.50 multiplied by 109kwh, and the economic benefit and the recovery benefit are very considerable.
The waste heat smoke components generated in the smelting process of the industrial silicon ore hot boiler mainly comprise gas components such as water vapor, carbon dioxide, oxygen, nitrogen, sulfur dioxide and the like, and also comprise dust with SiO2 (commonly called silicon micropowder) as a main component. The micro silicon powder has stronger adhesive force, the bonding property is enhanced along with the increase of the temperature, the average particle size is 200-400nm, the bulk density is 0.18, and the surface area of the dust wall reaches 20m 2/g. The heat-resistant and heat-insulating performance of the dust is very good, and the dust is a very good heat-insulating material, but if the dust is adhered to a heating surface tube bundle of a boiler, the heat exchange efficiency of the boiler can be greatly reduced, and the utilization rate of the waste heat of the boiler is reduced, so that the waste heat utilization of the submerged arc furnace is always a key technology researched by the submerged arc furnace waste heat boiler for timely and effectively removing the dust in the working process of the boiler and improving the utilization rate of the waste heat of the flue gas of the boiler in the aspect.
The existing ore-smelting furnace waste heat removal mode mainly comprises steel ball ash removal, shock wave ash removal and mechanical tube brush ash removal, and the steel ball ash removal mode has low manufacturing requirement because an ash removal device is not required to be arranged between tube bundles, and has low transportation cost because the steel ball ash removal mode leaves a factory as a bulk part, but the steel ball ash removal is not clean, the ash removal rate is below 60 percent, and the steel ball and carbon particles enter micro silicon powder to sinter and agglomerate, so that a flue gas channel is easily blocked, and meanwhile, when a steel ball lifting system accident happens, high-altitude overturning is caused, and casualty accidents are easily caused; the shock wave ash removal mode has the advantages of large acetylene consumption, high operation cost, incomplete ash removal, high exhaust gas temperature and low waste heat utilization rate, and cannot meet the requirement of waste heat utilization of the submerged arc furnace; the mechanical tube brush ash removal mode is a hotspot researched in each ash removal technology at the present stage, and the ash removal efficiency is relatively high.
Chinese patent (CN104296592B) discloses a cleaning device for a mechanical airflow type exhaust-heat boiler heat exchange tube, which comprises two clamping arms, a metal wire cleaning ball, and a steel wire ball state maintaining member. Because the steel wire ball state retaining piece is abutted against the metal steel wire cleaning ball, the metal steel wire cleaning ball can keep a fixed shape for a long time so as to overcome the flexibility and the gravity action of the metal steel wire cleaning ball, and simultaneously, high-pressure gas is introduced into the gas flow cavity through the gas flow inlet hole and is discharged from the gas flow outlet hole so as to blow off dust accumulated on the steel wire ball state retaining piece and the steel wire ball. However, the mechanical tube brush cleaning device does not reasonably design the contact degree and the cladding degree of the steel wire brush and the heat exchange tube, the lifting driving mode of the steel wire brush holder, the material of the steel wire brush or the steel wire ball and the like, so that the cleaning efficiency of the existing mechanical tube brush cleaning mode of the waste heat boiler is not high enough, the service life of the steel wire brush is short, and the brush head is inconvenient to replace and the like.
The related utility model people's prior granted patent (CN206399280U) of this application discloses a horizontal submerged arc furnace exhaust-heat boiler with elasticity deashing rag ash removal device, and this exhaust-heat boiler includes a plurality of horizontal modules, and every horizontal module all includes the boiler heat exchange tube bank that many boiler heat exchange tubes arranged along the vertical direction constitute, all is provided with the ash removal device in every horizontal module, and the ash removal of this ash removal device rack includes a plurality of elasticity deashing that are used for clearing up every boiler heat exchange tube surface, every boiler heat exchange tube closely contacts with at least two elasticity deashing rags, the ash removal rack can be along the reciprocating motion of boiler heat exchange tube in the vertical direction under the effect of transmission drive arrangement; the utility model discloses the people discovers, about former boiler bottom U type elbow locate mode, after the boiler operation longer time, infiltration or the condition of water clock have appeared in individuality elbow bottom and pillar sheet welding department, only take the area to press repair welding or blow out to change U type elbow and solve this problem, through the analysis, the production of this condition is because electric current is too big when individuality elbow and the pillar sheet welding in the manufacturing process, cause slight damage to the pressurized position, do not discover at hydrostatic test and trial run in-process, nevertheless in the later stage operation damage department hand long term load fluctuation, under metal fatigue's effect, leakage point has appeared.
Therefore, how to provide a horizontal natural circulation submerged arc furnace exhaust-heat boiler of steel brush deashing, on present submerged arc furnace exhaust-heat boiler's basis, improve boiler bottom locate mode, further improve the utilization ratio of boiler waste heat, effectively prolong its life, the technical problem that present technical staff in the field had a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
In view of this, the purpose of this application is to provide a horizontal natural circulation submerged arc furnace exhaust-heat boiler of steel brush deashing, provides a horizontal mechanical tube brush deashing mode of arranging, and the boiler bottom adopts the positioning mode of the embedded locating beam of U type elbow cooperation, further improves submerged arc furnace exhaust-heat boiler's life, and then reaches technical effect such as clean efficient, long service life, installation dismantlement convenience.
In order to achieve the above purpose, the present application provides the following technical solutions:
a horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by a steel brush comprises a horizontal steel structure frame and a horizontal module, wherein the horizontal steel structure frame is a box body with a support, the support is used for supporting the submerged arc furnace waste heat boiler, the box body is used as a shell of the submerged arc furnace waste heat boiler, the surface of the horizontal steel structure frame is provided with an access hole, two ends inside the horizontal steel structure frame are provided with flue gas channels, each flue gas channel comprises a flue gas inlet and a flue gas outlet, the horizontal module is arranged inside the horizontal steel structure frame, is positioned between the flue gas inlet and the flue gas outlet and is connected with the horizontal steel structure frame, the horizontal module comprises a boiler heat exchange tube bundle, an ash removing device, a transmission device and a driving device, the boiler heat exchange tube bundle is used for converting energy of waste heat of the boiler, the ash removing device is used for, the transmission device is used for enabling the ash cleaning mechanism to reciprocate, and the driving device is used for providing power for the transmission device.
The bottom positioning system of the submerged arc furnace waste heat boiler comprises a U-shaped elbow, an embedded positioning beam and limiting flat steel, wherein the bottom of the submerged arc furnace waste heat boiler adopts a positioning mode that the U-shaped elbow is matched with the embedded positioning beam, the limiting flat steel is arranged between two adjacent boiler heat exchange tubes and is connected with the embedded positioning beam in a welding mode, the U-shaped elbow at the bottom of the boiler has no constraint effect, moves downwards after being heated and expanded, and freely rocks all around after being subjected to a load effect.
The quantity of horizontal module is a plurality of, boiler heat exchanger tube bank comprises many boiler heat exchange tubes of arranging along vertical direction, through boiler heat exchanger tube bank mount, set screw and horizontal steel construction frame location locking, ash removal device adopts the structural style of rack shape, including fixed original paper and mechanical steel brush, the ash removal device perpendicular to boiler tube bank sets up, mechanical steel brush quantity is a plurality of for the surface of clearance every boiler heat exchange tube adopts positioning bolt and fixed original paper location locking, the both ends of fixed original paper are connected with transmission, every boiler heat exchange tube and two at least mechanical steel brush in close contact with, ash removal device is reciprocating motion along the vertical direction of boiler heat exchange tube under transmission's effect.
Preferably, the spacing between the heat exchange tube surfaces of two adjacent boilers is basically equal.
Preferably, the structural style of the mechanical steel brushes is a ring shape with a hole in the middle, a supporting structure with a cylindrical structure is arranged on the fixed original, and the hole in the middle of the mechanical steel brush is matched with the cylindrical structure of the supporting structure in shape.
Preferably, the fixing element is a metal bead, the mechanical steel brushes are fixedly mounted on the metal bead through bolts, two adjacent metal beads of the ash removal device are arranged on two planes of the ash removal device at intervals in a vertically staggered manner, and the adjacent mechanical steel brushes are also arranged on the upper and lower planes of the ash removal device in a staggered manner;
preferably, the transmission driving device comprises a transmission device and a driving device which are driven by asynchronous variable frequency transmission, and the reciprocating speed of the ash cleaning device is controlled by a variable frequency motor, so that the upward stroke speed of the ash cleaning device is greater than the downward stroke speed of the ash cleaning device in the reciprocating ash cleaning process.
The application has the advantages and effects as follows:
(1) the utility model discloses a among the hot stove exhaust-heat boiler of horizontal natural circulation ore deposit of steel brush deashing, boiler bottom adopts the embedded locating beam's of U type elbow cooperation locate mode, compares with the locating mode of the bayonet trompil locating beam of original boiler bottom U type elbow welding position round steel cooperation, has stopped the production of the impaired condition of elbow, has solved the problem that lower part elbow seeped water or dripped from the source, has improved greatly the hot stove exhaust-heat boiler's of ore deposit working life.
(2) The utility model discloses a among the hot stove waste heat boiler of horizontal natural circulation ore deposit of steel brush deashing, the bottom elbow has moved to down in the whole below horizontal steel construction frame bottom frame, when increasing heated area, guarantee that the ash passageway that falls still is unblocked, has improved greatly the hot stove waste heat boiler's of ore deposit flue gas heat utilization ratio.
(3) The utility model discloses a in the hot stove waste heat boiler of horizontal natural circulation ore deposit of steel brush deashing, be provided with the access hole that is used for changing mechanical steel brush, when mechanical steel brush need be changed, only need follow the boiler access hole will the metal layering is dismantled and is taken out, wholly changes the metal layering, also can conveniently change the mechanical steel brush of installing on the metal layering through the bolt, greatly reduced the hot stove waste heat boiler's of ore deposit operation degree of difficulty.
(4) The utility model discloses a among the horizontal natural circulation submerged arc furnace exhaust-heat boiler of steel brush deashing, its transmission drive arrangement adopts asynchronous transmission drive, through inverter motor control deashing device reciprocating motion's speed, and makes the speed of upstroke be greater than the speed of downstroke, so set up and prevent that the lighter dust of deashing device decline in-process quality can be along with updraft adhesion again on the boiler heat exchange tube of having cleaned, improved greatly submerged arc furnace exhaust-heat boiler's deashing efficiency.
The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of an internal structure of a horizontal steel brush ash removal natural circulation type submerged arc furnace waste heat boiler provided by an embodiment of the application;
FIG. 2 is a front view of a bottom positioning system of a submerged arc furnace waste heat boiler provided by an embodiment of the application;
FIG. 3 is a side view of a bottom positioning system of a submerged arc furnace waste heat boiler provided by an embodiment of the application;
FIG. 4 is a schematic view of a horizontal module of the waste heat boiler of the submerged arc furnace provided by the embodiment of the application;
FIG. 5 is a schematic view of an ash removal device of a submerged arc furnace waste heat boiler provided by an embodiment of the application;
fig. 6 is a schematic view of a water circulation system of a waste heat boiler of a submerged arc furnace according to an embodiment of the application.
Wherein, 1, a horizontal steel structure frame; 101. a box body; 102. a support; 103. a flue gas inlet; 104. a flue gas outlet; 2. a bottom positioning system; 201. a U-shaped elbow; 202. an embedded positioning beam; 203. limiting flat steel; 3. a horizontal module; 301. a boiler heat exchange tube bundle; 302. a boiler heat exchange tube bundle fixing frame; 303. a dust removal device; 331. fixing an original; 332. a mechanical steel brush; 304. a transmission device; 4. a water circulation system; 401. a steam drum; 402. a centralized downcomer; 403. and (5) a low-point header.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for the sake of clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
Example 1
The embodiment mainly introduces the basic composition and connection relationship of the horizontal steel brush deashing natural circulation type submerged arc furnace waste heat boiler.
As shown in fig. 1, which shows an internal structure schematic diagram of a horizontal steel brush ash removal natural circulation type submerged arc furnace waste heat boiler, an embodiment of the application provides a horizontal steel brush ash removal natural circulation type submerged arc furnace waste heat boiler, which comprises a horizontal steel structure frame 1 and a horizontal module 3, the structural form of the horizontal steel structure frame 1 is a box body 101 with a support 102, the support 102 is used for supporting the waste heat boiler of the submerged arc furnace, the box body 101 is used as the shell of the waste heat boiler of the submerged arc furnace, the surface of the horizontal steel structure frame 1 is provided with an access hole, two ends inside the horizontal steel structure frame 1 are provided with flue gas channels, the flue gas channel comprises a flue gas inlet 103 and a flue gas outlet 104, the horizontal module 3 is arranged inside the horizontal steel structure rack 1, is positioned between the flue gas inlet 103 and the flue gas outlet 104, is connected with the horizontal steel structure rack 1, and is used for converting energy of waste heat of a boiler; the water circulation system 4 is arranged on the outer side of the horizontal steel structure frame 1, connected with the horizontal module 3 and used for driving water in the horizontal module 3 to circularly flow to convert heat energy of high-temperature flue gas into the water circulation system 4, and the bottom positioning system 2 is arranged at the bottom of the horizontal module 3 and used for limiting the position of the horizontal module 3.
As shown in fig. 6, which shows a schematic diagram of a water circulation system of a submerged arc furnace waste heat boiler, the water circulation system 4 includes a steam drum 401, a centralized downcomer 402 and a low point header 403, the steam drum 401 is disposed above the horizontal module 3 and is connected with the horizontal module 3 through a bottom connection pipe, the centralized downcomer 402 is disposed at a side of the horizontal module 3, one end of the centralized downcomer is connected with the steam drum 401 through a bottom connection pipe, and the other end of the centralized downcomer is connected with the low point header 403; the low-point header 403 is arranged below the horizontal module 3 and is connected with a water inlet pipeline of the horizontal module 3 through a bottom connecting pipe. The centralized downcomer 402 is connected to the bottom of the drum 401, and in one embodiment, the centralized downcomer 402 comprises one or more parallel lines; the diameter of the pipeline can be 10-60 cm.
In one embodiment, the bottom connecting pipe is internally provided with a one-way valve for controlling the flow direction of water flow in the bottom connecting pipe and preventing suck-back.
In one embodiment, the centralized downcomer 402 is provided with a check valve inside to control the flow direction of water flowing through the centralized downcomer pipe, so as to prevent suck-back.
The water in the horizontal module 3 absorbs the heat energy in the high-temperature flue gas and then boils, and enters the steam drums 401 in the form of steam-water mixture, the steam-water mixture is recovered to the form of liquid water after heat energy replacement in the steam drums 401, the water in the steam drums 401 continuously flows into the centralized downcomer 402 under the action of gravitational potential energy and is converged and flows into the low-point header 403 through the centralized downcomer 402, and the water in the horizontal module 3 has small density and small pressure after absorbing the heat energy, the water in the centralized downcomer 403 has large density and large pressure, and the water circulation system 4 continuously performs natural circulation under the action of pressure difference.
As shown in fig. 2, the submerged arc furnace waste heat boiler further comprises a bottom positioning system 2 located at the bottom, the front view of the bottom positioning system is shown in fig. 3, the side view of the bottom positioning system 2 of the submerged arc furnace waste heat boiler is shown in combination with fig. 2 and 3, the submerged arc furnace waste heat boiler bottom positioning system 2 comprises a U-shaped elbow 201, an embedded positioning beam 202 and a limiting flat steel 203, the bottom of the submerged arc furnace waste heat boiler adopts a positioning mode that the U-shaped elbow 201 is matched with the embedded positioning beam 202, the limiting flat steel 203 is arranged between two adjacent boiler heat exchange tubes, the limiting flat steel 203 is connected with the embedded positioning beam 202 in a welding mode, the U-shaped elbow 201 at the bottom of the boiler has no constraint effect, moves downwards after being heated and expands, and freely rocks back, front, back, left and right, and.
As shown in fig. 4, a schematic diagram of horizontal modules 3 of the submerged arc furnace waste heat boiler is shown, as shown in fig. 5, a schematic diagram of a soot cleaning device 303 of the submerged arc furnace waste heat boiler is shown, and with reference to fig. 4 and 5, the number of the horizontal modules 3 is four, and the horizontal modules include a boiler heat exchange tube bundle 301, a soot cleaning device 303, a transmission device 304 and a driving device, wherein the soot cleaning device 303 is used for reciprocally cleaning soot on the surface of the boiler heat exchange tube bundle 301 in a vertical direction, the transmission device 304 is used for reciprocally moving the soot cleaning mechanism, and the driving device is used for providing power for the transmission device 304; boiler heat exchange tube bundle 301 comprises many boiler heat exchange tubes of arranging along vertical direction, through boiler heat exchange tube bundle mount 302, set screw and 1 location locking of horizontal steel construction frame, ash removal device 303 adopts the structural style of rack shape, including fixed original paper 331 and mechanical steel brush 332, the ash removal device perpendicular to boiler tube bundle sets up, mechanical steel brush 332 quantity is a plurality of for the surface of clearance every boiler heat exchange tube adopts positioning bolt and fixed original paper 331 location locking, the both ends of fixed original paper 331 are connected with transmission 304, every boiler heat exchange tube and two at least mechanical steel brush 332 in close contact with, ash removal device is reciprocating motion along the vertical direction of boiler under transmission 304's effect.
Further, the distance between the heat exchange tube surfaces of two adjacent boilers is basically equal, the distance is set to be L, the radius of the heat exchange tube of the boiler is set to be R, the mechanical steel brushes 332 are detachably and fixedly arranged on at least one fixing element of the ash removal device and fixedly arranged on the ash removal deviceThe mechanical steel brushes 332 on the fixed elements of the ash device have a maximum horizontal section in the natural state without contact with the boiler heat exchange tubes, which is substantially circular, with a diameter D, and
furthermore, the structural form of the mechanical steel brushes 332 is a circular ring with a hole in the middle, a supporting structure with a cylindrical structure is arranged on the fixing element 331, and the hole in the middle of the mechanical steel brush 332 is matched with the cylindrical structure of the supporting structure in shape.
Further, the fixing element 331 is a metal bead, the mechanical steel brushes 332 are fixedly mounted on the metal bead through bolts, two adjacent metal beads of the ash removal device are arranged on two planes of the ash removal device at intervals and in a vertically staggered manner, and the adjacent mechanical steel brushes 332 are also arranged on the two planes of the ash removal device in a staggered manner.
Further, the transmission driving device comprises a transmission device 304 and a driving device which are driven by asynchronous variable frequency transmission, and a variable frequency motor is used for controlling the reciprocating speed of the ash cleaning device, so that in the ash cleaning process of the reciprocating motion of the ash cleaning device, the upward stroke speed of the ash cleaning device is greater than the downward stroke speed, the rising speed of the ash cleaning device is set as a, the falling speed is set as b, a is greater than b, and the reciprocating ash cleaning frequency is set to be 0.2-2 times/min, preferably 1 time/min.
Preferably, the ash removing device is made of 310S stainless steel material, and the mechanical steel brush 332 is made of 316 stainless steel wire drawing.
Preferably, an expansion gap is reserved between the edge of the ash removal device and the inner side of the horizontal steel structure frame 1, and the expansion gap is 30-60 mm.
Preferably, ash pipe and ash falling bucket (not shown in the figure) are respectively arranged below the horizontal steel structure frame 1 corresponding to each horizontal module 3, the ash pipe and the ash falling bucket are connected in a welded manner, and an ash valve is arranged on the ash pipe.
It should be noted that the transmission device 304 is connected to a driving device (not shown in the figure) to drive the ash removal device to reciprocate along the vertical direction of the heat exchange tube of the boiler, and the driving device is the prior art in the field and is not described in detail in this application.
Example 2
The embodiment is carried out on the basis of the embodiment 1, and mainly introduces the working principle of the submerged arc furnace waste heat boiler in the form of horizontal steel brush ash removal natural circulation.
With reference to fig. 1 to 5, the specific steps of the operation of the device are as follows:
step 1: high-temperature flue gas enters a flue gas channel of the horizontal steel structure frame 1 from the flue gas inlet 103, the high-temperature flue gas is contacted with the boiler heat exchange tube bundle 301, and the heat energy of the high-temperature flue gas heats water in the horizontal module 3 to boil;
step 2: boiling water enters the steam drum 401 in the form of steam-water mixture, and is recovered into the form of liquid water after heat energy replacement is completed in the steam drum 401;
and step 3: the water in the steam drums 401 continuously flows into the centralized downcomer 402 under the action of gravitational potential energy, and is converged and flows into the low-point header 403 through the centralized downcomer 402;
and 4, step 4: the water in the low-point header 403 flows back into the horizontal module 3 under the action of pressure difference, and the natural circulation of the water is completed;
and 5: a driving device switch is turned on, and the transmission device 304 drives the ash removal device to reciprocate along the vertical direction of the boiler heat exchange tube to remove dust attached to the surface of the boiler heat exchange tube bundle 301;
step 6: the low-temperature flue gas after heat conversion flows out of the flue gas channel of the horizontal steel structure rack 1 from the flue gas outlet 104. Therefore, the method for performing waste heat conversion on the horizontal steel brush deashing submerged arc furnace waste heat boiler in the natural circulation mode is realized.
The previous description of all disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The horizontal natural circulation submerged arc furnace waste heat boiler for removing the ash by the steel brush is characterized by comprising a horizontal steel structure frame (1) and a plurality of horizontal modules (3), wherein each horizontal module is provided with a water circulation system (4) in natural circulation, each water circulation system (4) comprises a steam pocket (401), a centralized downcomer (402) and a low point collection box (403), the steam pocket (401) is connected with the horizontal modules (3) through a bottom connecting pipe, one end of the centralized downcomer (402) is connected with the steam pocket (401) through the bottom connecting pipe, the other end of the centralized downcomer is connected with the low point collection box (403), and the low point collection box (403) is connected with a water inlet pipeline of the horizontal module (3) through the bottom connecting pipe; the structural form of the horizontal steel structure frame (1) is a box body (101) with a support (102), the support (102) is used for supporting the submerged arc furnace waste heat boiler, the box body (101) is used as a shell of the submerged arc furnace waste heat boiler, the surface of the horizontal steel structure rack (1) is provided with an access hole, two ends inside the horizontal steel structure rack (1) are provided with flue gas channels, the flue gas channel comprises a flue gas inlet (103) and a flue gas outlet (104), the horizontal module (3) is arranged in the horizontal steel structure rack (1) and is positioned between the flue gas inlet (103) and the flue gas outlet (104), the horizontal type module (3) comprises a boiler heat exchange tube bundle (301), an ash cleaning device (303), a transmission device (304) and a driving device, wherein the boiler heat exchange tube bundle (301) is used for converting energy of waste heat of a boiler.
2. The horizontal natural circulation submerged arc furnace waste heat boiler with the steel brush for ash removal according to claim 1, wherein the submerged arc furnace waste heat boiler bottom positioning system (2) comprises a U-shaped elbow (201), an embedded positioning beam (202) and a limiting flat steel (203), the U-shaped elbow (201) is matched with the embedded positioning beam (202) in a positioning mode at the bottom of the submerged arc furnace waste heat boiler, the limiting flat steel (203) is arranged between two adjacent boiler heat exchange tubes, the limiting flat steel (203) is connected with the embedded positioning beam (202) in a welding mode, the U-shaped elbow (201) at the bottom of the boiler has no constraint effect, moves downwards after being heated and expanded, and freely swings forwards, backwards, leftwards and rightwards after being loaded.
3. The steel brush ash removal horizontal natural circulation submerged arc furnace waste heat boiler as defined in claim 1, wherein the number of the horizontal modules (3) is several, the boiler heat exchange tube bundle (301) is composed of a plurality of boiler heat exchange tubes arranged along the vertical direction, and is positioned and locked with the horizontal steel structure frame (1) through a boiler heat exchange tube bundle fixing frame (302) and positioning screws, the ash removal device (303) adopts a grid-shaped structure form and comprises a fixing element (331) and mechanical steel brushes (332), the ash removal device is arranged perpendicular to the boiler tube bundle, the number of the mechanical steel brushes (332) is several, the mechanical steel brushes are used for cleaning the outer surface of each boiler heat exchange tube and are positioned and locked with the fixing element (331) through positioning bolts, two ends of the fixing element (331) are connected with a transmission device (304), and each boiler heat exchange tube is in close contact with at least two mechanical steel brushes (332), the ash cleaning device reciprocates along the vertical direction of the heat exchange tube of the boiler under the action of a transmission device (304).
4. The steel brush ash-removing horizontal natural circulation submerged arc furnace waste heat boiler according to claim 3, wherein the distance between the heat exchange tube surfaces of two adjacent boilers is substantially equal, the distance is set as L, the radius of the heat exchange tube of the boiler is set as R, the mechanical steel brush (332) is detachably and fixedly arranged on at least one fixing element of the ash-removing device, the maximum horizontal cross section of the mechanical steel brush (332) fixedly arranged on the fixing element of the ash-removing device in a natural state without being contacted with the heat exchange tube of the boiler is substantially circular, the diameter of the circle is set as D, and
。
5. the horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by using the steel brushes as defined in claim 4, wherein the structural form of the mechanical steel brushes (332) is a circular ring with a central opening, the fixed element (331) is provided with a supporting structure with a cylindrical structure, and the central opening of the mechanical steel brushes (332) is matched with the cylindrical structure of the supporting structure in shape.
6. The horizontal natural circulation submerged arc furnace waste heat boiler for removing the ash by the steel brush as recited in claim 5, wherein the fixing element (331) is a metal bead, the mechanical steel brush (332) is fixedly mounted on the metal bead by a bolt, two adjacent metal beads of the ash removing device are arranged on two planes of the ash removing device at intervals and in a vertically staggered manner, and the adjacent mechanical steel brush (332) is also arranged on the two planes of the ash removing device in a staggered manner.
7. The horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by using the steel brush as defined in claim 6, wherein the transmission device (304) and the driving device are driven by asynchronous variable frequency transmission, and a variable frequency motor is used for controlling the reciprocating speed of the ash removing device, so that the upward stroke speed of the ash removing device is higher than the downward stroke speed of the ash removing device during the reciprocating ash removing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020560532.1U CN212006782U (en) | 2020-04-16 | 2020-04-16 | Horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by steel brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020560532.1U CN212006782U (en) | 2020-04-16 | 2020-04-16 | Horizontal natural circulation submerged arc furnace waste heat boiler for removing ash by steel brush |
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