CN101776274A - Non-coal leaking front air-outlet reciprocating grate segment for large suspension-type reciprocating grate - Google Patents
Non-coal leaking front air-outlet reciprocating grate segment for large suspension-type reciprocating grate Download PDFInfo
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Abstract
The invention relates to a non-coal leaking front air-outlet reciprocating grate segment for a large suspension-type reciprocating grate, in particular to a non-coal leaking front air-outlet reciprocating grate segment which uses the principle of aerodynamics, is used on a 14-700MW large suspension-type industrial reciprocating grate boiler with an angle of inclination of 12 to 25 degrees, and belongs to the technical field of International Patent Classification F23H coal fired boilers. Orienting to the future, being used for the development of large or very large reciprocating grate boilers and solving the problems of no restriction by the random working condition changes of combustion air supply and the implementation of equal pressure air supply and the combustion air distribution of a grate segment crack air outlet and becoming the focus of large-scale development and research, the non-coal leaking front air-outlet reciprocating grate segment fully adopts the design of a variable cross section ventilation slot structure, a cross section is reduced along the ventilation direction, so that the combustion air flows to the grate crack outlet through the variable cross section ventilation slot and a ventilation dynamic back-pressure chamber, thereby changing the ventilation dynamic airflow of the ventilation dynamic back-pressure chamber and balancing the static pressure. The combustion air dynamic pressure is realized in the narrow strip structure of the grate segment, the combined encryption crack of the grate segment and a secondary control combustion air supply process, and the static pressure is kept balanced; and the combustion air equal pressure balanced air distribution is realized on the grate segment crack outlet, and directly actioned on a combustion coal layer.
Description
Technical field
The present invention relates to utilize aerodynamic principle, boiler combustion principle, be used for the non-coal leaking front air-outlet reciprocating furance row that on the pusher industrial reciprocating-grate boiler of the large-scale suspension active of inclination angle 12-15 ° 14-700MW, uses, belong to International Classification of Patents F23H coal-burning boiler technical field.
Background technology
In this field, in the prior art, the furnace grate of small-sized coal-fired reciprocating-grate boiler is generally used for below the 14MW; For many years away from market.Because of reciprocating-grate boiler is applicable to colm, plant fuel, when the energy faces exhausted crisis gradually, pay close attention to again for everybody institute again.Thereby do not stint the reciprocating-grate boiler of plant fuel of huge fund introduction of foreign technology, be generally used for the following boiler of 46MW.No matter adopt the traditional manufacture or the foreign technology of introduction, all have traditionally fire-grating chip architecture design defect, serious because of leaking coal, air-supply, inhomogeneous cooling is even and burn out fire grate segment.After updating, still do not find solution, leak coal, air vent stops up and causes ventilation not smooth, the efficiency of combustion that causes descends, and mechanical breakdown is frequent, temperature distortion, operation are asynchronous, the way of fatal design defect such as operation stability difference.Therefore people once placed hope on the foreign technology of introduction, the bulk heat-resisting alloy fire grate segment that introduction involves great expense, replace traditional reciprocating furance row, but still can't resolve the high-temp combustion of large-scale coal-fired reciprocating-grate boiler in the reality, ventilate, leak coal, burn sheet, thermal deformation is asynchronous with reciprocating motion etc., the Structure Designing Problem of restriction large scale development; The reciprocating-grate boiler that only can be used for plant fuel.Can not be used for fire grate segment large-scale or the pusher coal-fired high temperature reciprocating-grate boiler of ultra-large type suspension active.Therefore the present invention is for solving historical difficult point problems such as long-term innovative design that has restricted the reciprocating furance row that the high-temp combustion reciprocating-grate boiler uses and manufacturing, adapting to the needs of future development.
At present before the present invention, also not retrieval, find, be used for the feasibility technical scheme of complete solution large-scale or coal-fired high temperature reciprocating-grate boiler of ultra-large type and fire grate segment; Maybe can be used for coal-fired large-scale or ultra-large type reciprocating-grate boiler, solve air-supply and heat radiation, not burn out the basic method of fire grate segment problem.Though people improve for solving fire grate segment layering front air outlet, are used to improve burning condition; But leakage coal and front end high-temperature heating burning problems have been caused.The reciprocating-grate boiler large scale development is to improve burning operating condition and the measure of boiler operatiopn thermal efficiency unique technical.Still there be fire grate segment, leakage coal, the fluctuation of service problem of burning out in prior art.The condition restriction of temperature distortion, structural design etc. cause many fatal designs, manufacturing defect, have restricted the large scale development of reciprocating-grate boiler.China is to be the country of main energy sources with the fire coal, and historical energy waste and destructive exploitation cause domestic limited lack of energy at present, low heat value coal resource, plant fuel, more apparent important of the comprehensive utilization of waste fuel.The above large-scale or ultra-large type reciprocating-grate boiler of development 14MW-700MW that faces the future is used inexorable trend, and the problems referred to above are the not enough and critical defect problems of left over by history, have seriously restricted the large scale development of following reciprocating-grate boiler.
Summary of the invention
The present invention, the purpose that is used for the non-coal leaking front air-outlet reciprocating furance row implemented on the pusher industrial reciprocating-grate boiler of the large-scale suspension active of inclination angle 12-15 ° 14-700MW is:
1. non-coal leaking front air-outlet reciprocating furance row adopts the plain cast iron material to replace the fire grate segment of the heat-resisting allay material that involves great expense.According to aerodynamic principle, all adopt variable cross-section ventilation slot structural design, its cross section to reduce gradually along direction of ventilation, make combustion air through variable cross-section ventilation slot, the dynamic back pressure cavity of ventilating, to the outlet of fire grate bar seam, change the ventilation dynamic air current of the dynamic back pressure cavity of ventilating, reach static balance.Close seam assembled arrangement of the fillet structure of fire grate segment, reciprocating furance row, the combustion air dynamic pressure in the secondary control burning air-supply process keeps static balance; So that the combustion air of bar seam outlet is implemented isobaric balanced cloth wind, directly act on burning coal layer.Leakage coal, the high temperature of fundamentally changing bulk fire grate segment, preceding layering air outlet fire grate segment burn the sheet problem.Adopt the strip aeration technology of 20-40 millimeter width, changed air-cooled and cooling condition, the mechanical strength of fire grate segment when high-temp combustion, solve burning required air ventilation condition and coal leak preventing technology, effectively prevent the high temperature scaling loss of fire grate segment, fundamentally change the burning situation of reciprocating-grate boiler.
2, according to aerodynamic principle, in the water-cooled suspension active advance frame unit of inclination angle 12-15 ° 14-700MW large suspension-type industry reciprocal grate, or on the water-cooled fixed mount unit; Installation is used for the non-coal leaking front air-outlet reciprocating furance row of large suspension-type reciprocal grate, and the fire grate segment assembled unit is general.Be not subjected to because of the reciprocal grate large scale development, and the ever-increasing size restrictions of fire grate width dimensions that causes.Arbitrarily unit combination is arranged, and has ensured the be not heated cooling and the mechanical strength at the stressed place of fire grate segment, has solved the existing structural design manufacturing defect of the asynchronous and part of reciprocal propelling.
3, according to aerodynamic principle, use in conjunction with the engineering of isobaric air supplying technology on the large reciprocating grate boiler, increase the density that fire grate unit combination bar seam is arranged, the structural design of the linear air duct slats seam of stable 2-3 millimeter fillet shape, ensured that all air duct slats sealing sizes of combination back and ventilation, blast are consistent, fundamentally changed outmoded principle structure design, solved and improve coal-fired high-temp combustion environment, necessary fire grate segment ventilates and the cooling problem; Avoid causing ventilation not smooth, influence efficiency of combustion, the incinerator screening because of the lumpy structure air vent stops up.
4, according to aerodynamic principle, fire grate at the pusher industrial reciprocating-grate boiler of the large-scale suspension active of inclination angle 12-15 ° 14-700MW, the reciprocating motion track of reciprocating furance row activity template on the reciprocating furance row stator, the interior work of scope of satisfying the 60-300 millimeter moves back and forth, satisfy the needs greater than 80-250 millimeter burning coal layer, that satisfies burning coal layer various combustion conditions under pokes fire, advances the needs that roll and break Jiao.The front end section of reciprocating furance row is the design of R130-150mm circular arc, constituting 50-60 ° pushes away the coal arc chord angle and has ensured that along circular arc bar seam all air duct slats sealing sizes of combination back and ventilation, blast are consistent, front end ventilate uniform performance and cooling performance have been ensured, effectively ensured reciprocating furance row nose circle forearc face, the air-supply of full arc upper thread; Fundamentally changed in the be heated mechanical strength of direction and fire grate segment of the burning of burning coal layer high-temperature region, improved the burning ventilation condition, given full play to broken Jiao of reciprocal grate and the fuel bed propulsion characteristic that rolls.Fundamentally changed, generally the lumpy structure front end layering air vent that adopts is blown and the leakage coal and the obstruction of generation, and it is not smooth to cause ventilating, the fire grate segment front end, and high-temperature heating is burnt, the critical defect of influence burning and stable operation of the boiler.
5, according to aerodynamic principle, burning face, the front end air duct slats tape edge of the pusher industrial reciprocating furance row of large-scale suspension active are provided with the variable cross-section air outlet that upwards is 45 °, according to the principle of mechanics of granular media, the stocking angle when becoming 45 variable cross-section ventilation slots to constitute back and forth propelling; Prevent that fine particle from entering the air channel, ensured ventilation and cooling when moving back and forth, solve the coal problem of leaking.
6, according to aerodynamic principle, theory of mechanics is provided with at the gusset of fire grate segment and is connected and fixed hole and connecting rod, can form the fixing spacing of independent stationary unit that the 10-50 sheet pegs graft according to the design needs.Ensured ventilating ratio 8-12%, the uniformity of air duct slats seam 2-3 mm size.Solved branchs fork obstruction in the fire grate segment front end hand that fire grate segment generally occurs when back and forth promoting, the movement locus that causes is asynchronous, the fluctuation of service defective.
Technical scheme
1, the present invention, the technical scheme that is used for the non-coal leaking front air-outlet reciprocating furance row implemented on the pusher industrial reciprocating-grate boiler of the large-scale suspension active of inclination angle 12-15 ° 14-700MW is:
According to aerodynamic principle, at the pusher industrial reciprocal grate of the large-scale suspension active of inclination angle 12-25 ° 14-700MW, the reciprocating furance row assembled unit is installed in water-cooled suspension active advance frame unit, or on the water-cooled fixed mount unit; Upwards install successively by the fire grate lower end; Reciprocating furance row is general.Be installed in the reciprocating motion track of reciprocating furance row activity template on the reciprocating furance row stator of water-cooled suspension active advance frame unit, the interior work of scope of satisfying the 60-300 millimeter moves back and forth, satisfy the needs greater than 80-250 millimeter burning coal layer, that satisfies burning coal layer various combustion conditions under pokes fire, advances the needs that roll and break Jiao.The elongated shape of the 250-400mm of reciprocating furance row, width 25-40mm, the front end section of reciprocating furance row is the design of R130-150mm circular arc, constituting 50-60 ° pushes away the coal arc chord angle and has ensured that along circular arc bar seam all air duct slats sealing sizes of combination back and ventilation, blast are consistent, front end ventilate uniform performance and cooling performance have been ensured, effectively ensured reciprocating furance row nose circle forearc face, the air-supply of full arc upper thread; Fundamentally changed in the be heated mechanical strength of direction and fire grate segment of the burning of burning coal layer high-temperature region, improved the burning ventilation condition, given full play to broken Jiao of reciprocating furance row and the fuel bed propulsion characteristic that rolls, promote when stressed, front end becomes an integral unit under the effect that connects limit shaft, can not leak out, leak coal and influence the flameholding operation because of the stressed fork, slit that occurs.The reciprocating furance row assembled unit connects spacing fire grate axle, packing ring by reciprocating furance row left side sheet, the right sheet of reciprocating furance row, front end, and split pin is formed.The reciprocal grate rear end has the circular arc deck to be separately fixed at water-cooled suspension active advance frame unit, or on the water-cooled fixed mount unit water-cooled axle, its thickness is greater than working portion 2-3 millimeter, be connected spacing fire grate axle, packing ring with limited block, front end bottom front end that the inboard is provided with, split pin constitutes the work air port consistent size of the bar seam air outlet of reciprocating furance row.
2, face the future, realize large-scale or the development of ultra-large type reciprocating-grate boiler, the coal-burning boiler combustion mechanism defines burning area and constantly increases when developing, defining of longitudinal size, the fire grate width dimensions constantly develops into inevitable development trend, the regulation and control of separating the working conditions change at random of the air-supply of never being burnt limit, implement the burning cloth wind equalization problem of isobaric air supplying and fire grate slip seam air outlet, become the large scale development research focus, it is the coal leak preventing plug-in type unit combination while that solves reciprocating furance row imposing a condition, because the air duct slats seam is arranged in the encryption of reciprocating furance row, along direction of ventilation the variable cross-section ventilation slot that reduces gradually and the dynamic back pressure cavity of ventilating, bar seam and front end air duct slats stitch etc. compress wind, the transversal ventilation combustion problem, solve the ventilation of fire grate segment, improved burning situation.The particularly ventilation of front end high-temperature region and cooling.The ventilation slot that front end vertical linearity bar seam ventilates and outer surface is provided with when fire grate segment advances has comprehensively solved the ventilation and the cooling problem of coal-fired high-temperature region, and the change of this essence becomes the core technology that the present invention will solve.
3, according to aerodynamic principle, the front end air duct slats tape edge of the pusher industrial reciprocating furance row of large-scale suspension active is provided with the semi arch air port that upwards is 45 °, and according to the principle of mechanics of granular media, wind groove at 45 constitutes the stocking angle when back and forth advancing; Prevent that fine particle from entering the air channel, ensured the ventilation when moving back and forth and do not leaked coal.At fire grate segment recess and gusset direct casting limited block, spacing hole are arranged.According to aerodynamics, the boiler combustion design, projection is plugged in the reciprocating furance row recess and constitutes rational aeration structure, has effectively solved burning and has ventilated and cooling, anti-leak-stopping coal.On the projection on section part, the projection plane and section be provided with, according to aerodynamic principle, all adopt variable cross-section ventilation slot structural design, the combustion air dynamic pressure in the secondary control burning air-supply process keeps static balance; Be not subjected to set at random the restriction of ventilation working conditions change,, implement isobaric balanced cloth wind, directly act on burning coal layer the combustion air of fire grate slip seam air outlet.Change the strip aeration technology that bulk fire grate segment leak proof technology is the 20-40 millimeter, changed reciprocating furance row when high-temp combustion air-cooled condition and mechanical strength, ensure the cooling needs of burning required air ventilation condition and fire grate segment, effectively prevented the high temperature scaling loss of fire grate segment.Solved the coal leak preventing technology, projection frontal arc outer surface, the smooth dynamic back pressure cavity of rational ventilation that leaves, guarantee the ventilation of circular arc external surface and the needs of cooling, reciprocating furance row front end circular arc external surface is provided with ventilation slot, isolate when having improved reciprocal promotion campaign, make burning coal layer because of the radical change of air-supply structure mode, and the direction that the change burning radiation is heated.
4, according to aerodynamic principle, theory of mechanics, thermal technology principle, heat Balance Calculation also can be formed the independent stationary unit that the 10-60 sheet is pegged graft according to the design needs.Be provided with at the gusset of reciprocating furance row and be connected and fixed hole and connecting rod, fixing spacing.Ensured the combination of the arbitrary dimension quantity of reciprocal grate blade unit, ensured ventilating ratio 8-12%, the uniformity of air duct slats seam 2-3 mm size.Solved branchs fork obstruction in the fire grate segment front end hand that fire grate segment generally occurs when back and forth promoting, the movement locus that causes is asynchronous, the fluctuation of service defective.
Realize the isobaric air supplying of large reciprocating grate boiler and fire grate slip seam, must adapt to the great fluctuation process operating condition of large reciprocating grate boiler, change the lumpy structure of reciprocating furance row, be the assembled unit of innovation bar crack structure to burning coal layer.Improve the cooling condition that ventilates with fire grate segment, improve the high-temperature heating district mechanical strength of fire grate segment.Meanwhile, the combination of pegging graft of the fire grate segment of slit-aperture type is connected with the spacing of front end, is fixed in cooling in conjunction with the bayonet socket of rear end, has ensured the stability of the moving plate reciprocating motion track on the overlap joint stator,
Realize large reciprocating grate boiler isobaric air supplying, must guarantee that the air quantity of reciprocal grate slip seam outlet, blast equate, could guarantee efficient, the energy-saving combustion operating mode of industrial chain furnace grate.
Core of the present invention is the draft type and the configuration of the active and passive fire grate segment of or ultra-large type reciprocating-grate boiler large-scale at fire coal.Be the basis of burning problem left over by history that solves reciprocating furance row, isobaric air supplying be solve reciprocating furance row burn one of important means.And the key factor of the draft type of reciprocating furance row design and configuration also to be influence coal-fired large-scale or ultra-large type reciprocating-grate boiler combustion conditions is to solve burning with improving of reciprocating furance row to improve one of major reason of combustion conditions problem.
According to the coal-burning boiler combustion mechanism, the volatilization of or ultra-large type reciprocating-grate boiler large-scale, separate out section, coke burning block at fire coal, adopt the narrow air duct slats seam of 20-50 millimeter to add the front air outlet reciprocating furance row, ensured that this burning block required air ventilation is big, the needs that promote, roll and blow, the optimal ventilation and the cooling of fire grate segment have been ensured, anti-leak-stopping coal.Prevent that effectively ventilation is little, ventilation cloth wind is unreasonable because of burning, and the ignition temperature height causes the fire grate segment burning phenomenon.
The embodiment structure:
The pusher industrial reciprocating furance row of large-scale suspension active is installed in water-cooled suspension active advance frame unit respectively, or on the water-cooled fixed mount unit; The left sheet (4) of large reciprocating grate sheet, the right sheet (5) of large reciprocating grate is finished the connection between fire grate segment by connection spacing bearing pin (1), packing ring (2), split pin (3) grafting respectively, makes it to become separately independently reciprocal grate blade unit; Be installed in the movable reciprocal grate blade unit (6) on the water-cooled suspension active advance frame unit, hang doing on the reciprocating furance row stator unit (7) on the fixing advance frame unit and back and forth push away coal and move being installed in water-cooled, poking fire of burning coal layer under the various combustion conditions of realization promotion, the propelling in coal seam is rolled and is broken burnt burning needs, the interior work of scope that can realize the 60-300 millimeter moves back and forth, realization needs greater than the burning of 80-250 millimeter burning coal layer, combustion air from the isobaric air compartment of fire grate, along fire grate segment work gusset side ventilating duct, the footpath is after the isobaric processing of the secondary of variable cross-section ventilation slot, enter the dynamic back pressure cavity of ventilation (31) that reciprocating furance row constitutes, fire grate segment air duct slats seam, respectively on fire grate segment, the balanced ventilation of preceding article seam air outlet is to realize the blast of fire grate slip seam air outlet, air quantity, the wind speed uniformity.
Reciprocating furance row left side sheet (4), the elongated shape 250-400mm of fire grate segment (8), fire grate segment width (9) 25-40mm, the front end section of reciprocating furance row is 130-150mm circular arc (10), constituting 50-60 ° pushes away the coal arc chord angle and has ensured that along circular arc bar seam all air duct slats sealing sizes of combination back and ventilation, blast are consistent, front end circular arc external surface ventilation slot (11) has ensured front end ventilate uniform performance and cooling performance, effectively ensured reciprocating furance row nose circle forearc face, the linear air-supply of arc surface preceding article seam air outlet (12); Fundamentally changed in the be heated mechanical strength of direction and fire grate segment of the burning of burning coal layer high-temperature region, improved the burning ventilation condition, given full play to broken Jiao of reciprocating furance row and the fuel bed propulsion characteristic that rolls, promote when stressed, front end becomes an integral unit under the effect that connects limit shaft, can not leak out, leak coal and influence the flameholding operation because of the stressed fork, slit that occurs.Be provided with work gusset (13) in the middle of the bottom of reciprocating furance row left side sheet (4), circular arc screens gusset (14) in the middle of the rear portion is provided with, circular arc screens gusset (14), front end is fixing spacing (15), the rear end is fixing spacing (16), the front portion of work gusset is provided with the hole that is located by connecting (17), in the middle of fire grate segment concave surface one side is provided with spacing (18), rear end spacing (19), the top of fire grate segment convex surface one side, be provided with grafting coal leak preventing lines platforms (20) in the preceding circular arc line, the variable cross-section ventilation slot that medial surface reduces gradually along direction of ventilation is (21) 1., upper plane is provided with variable cross-section ventilation slot 2. (22), upper inner face arc surface is provided with variable cross-section ventilation slot 3. (23), the dynamic pressure of secondary control burning wind pushing air reaches isobaric, realizes the equilibrium of fire grate slip seam air outlet cloth wind.The front portion of circular arc screens gusset (25), front end fixing spacing (26), rear end fixing spacing (27), work gusset was provided with the hole that is located by connecting (28), spacing (29), rear end spacing (30) in the middle of fire grate segment concave surface one side is provided with in the middle of work gusset (24), rear portion were provided with in the middle of sheet (5) bottom, a reciprocating furance row left side was provided with.
Beneficial effect
The pusher industrial reciprocating furance row of the large-scale suspension active of the present invention is at 14-700MW large suspension-type industry reciprocating-grate boiler, realizes improving the boiler combustion efficiency of colm, plant fuel.Explore the ideal burning operating mode that realizes the large reciprocating grate boiler, fundamentally solve the leakage coal of coal-fired large reciprocating grate boiler and the high temperature of ventilation and fire grate segment and burn problem, reach efficient, energy-conservation.Be to ensure large-scale or ultra-large type reciprocating-grate boiler, maximizing manufactures and designs and effective measures under desirable combustion conditions.
Description of drawings
Accompanying drawing 1 be the pusher industrial reciprocating furance row of large-scale suspension active analyse and observe the assembled unit schematic diagram.
Among the figure: 1, connect spacing bearing pin, 2 packing rings, 3 split pins, 4, the left sheet of large reciprocating grate sheet, the right sheet of 5 large reciprocating grates, 31, the dynamic back pressure cavity of ventilating.
Accompanying drawing 2 is A-A cutaway views of accompanying drawing 1.
Among the figure: 10, circular arc, 20, grafting coal leak preventing lines platform, 21, the variable cross-section ventilation slot 1., 23, the variable cross-section ventilation slot 3..
Accompanying drawing 3 is elevational schematic view of accompanying drawing 2
Among the figure: 8, reciprocal grate leaf length
Accompanying drawing 4 is schematic top plan view of accompanying drawing 1
Among the figure: 22, the variable cross-section ventilation slot 2.,
Among the figure: 18, middle spacing
Accompanying drawing 6 is schematic side view of accompanying drawing 5
Among the figure: 13, work gusset, 14, circular arc screens gusset, 15, front end is fixing spacing, 16, the rear end is fixing spacing, 17, the hole that is located by connecting, 19, the rear end is spacing.
Accompanying drawing 7 is that the C of accompanying drawing 2 is to looking schematic diagram
Among the figure: 9, reciprocal grate width, 11, front end circular arc external surface ventilation slot.
Accompanying drawing 8 is that the C of accompanying drawing 7 looks schematic diagram to arrangement
Among the figure: 12, arc surface preceding article seam air outlet.
Accompanying drawing 9 is that the right sheet of reciprocating furance row (5) is looked schematic diagram
Among the figure: 24, middle work gusset, 25, middle circular arc screens gusset.
Accompanying drawing 10 is elevational schematic view of accompanying drawing 9
Among the figure: 26, front end is spacing, and 27, the rear end is spacing, 28, the hole is located by connecting.
Accompanying drawing 11 is schematic top plan view of accompanying drawing 9
Among the figure: 29, front end is spacing, and 30, the rear end is spacing.
Accompanying drawing 12 is to move back and forth schematic diagram
Among the figure: 6, movable furnace grate plate, 7, fixed grate film.
The specific embodiment
The pusher industrial reciprocating furance row of the large-scale suspension active of the present invention is to be installed in water-cooled suspension active advance frame unit respectively, or the unit block on the water-cooled fixed mount unit; The left sheet (4) of large reciprocating grate sheet wherein, the right sheet (5) of large reciprocating grate is pegged graft and is finished between fire grate segment in succession by connecting spacing bearing pin (1), packing ring (2), split pin (3) respectively, makes it to become separately independently reciprocal grate blade unit; Be installed in the movable reciprocal grate blade unit (6) on the water-cooled suspension active advance frame unit, hang doing on the reciprocating furance row stator unit (7) on the fixing advance frame unit and back and forth push away coal and move being installed in water-cooled, poking fire of burning coal layer under the various combustion conditions of realization promotion, the propelling in coal seam is rolled and is broken burnt burning needs, the interior work of scope that can realize the 60-300 millimeter moves back and forth, realization needs greater than the burning of 80-250 millimeter burning coal layer, combustion air from the isobaric air compartment of fire grate, along fire grate segment work gusset side ventilating duct, after the isobaric processing of the secondary of variable cross-section ventilation slot, enter the dynamic back pressure cavity of ventilation (31) that reciprocating furance row constitutes, fire grate segment air duct slats seam, respectively on fire grate segment, preceding article seam air outlet even distributing wind is to realize the blast of fire grate slip seam air outlet, air quantity, the wind speed uniformity.
Reciprocating furance row left side sheet (4), the elongated shape 250-400mm of fire grate segment (8), fire grate segment width (9) 25-40mm, the front end section of reciprocating furance row is 130-150mm circular arc (10), constituting 50-60 ° pushes away the coal arc chord angle and has ensured combination back all air duct slats sealing size and ventilations along circular arc linear strips seam, the blast unanimity, improved the vent air temperature, front end circular arc external surface ventilation slot (11) has ensured front end ventilate uniform performance and cooling performance, effectively ensured reciprocating furance row nose circle forearc face, the linear air-supply of arc surface preceding article seam air outlet (12); Fundamentally changed in the be heated mechanical strength of direction and fire grate segment of the burning of burning coal layer high-temperature region, improved the burning ventilation condition, given full play to broken Jiao of reciprocating furance row and the fuel bed propulsion characteristic that rolls, promote when stressed, front end becomes an integral unit under the effect that connects limit shaft, can not leak out, leak coal and influence the flameholding operation because of the stressed fork, slit that occurs.Be provided with work gusset (13) in the middle of the bottom of reciprocating furance row left side sheet (4), circular arc screens gusset (14) in the middle of the rear portion is provided with, circular arc screens gusset (14), front end is fixing spacing (15), the rear end is fixing spacing (16), the front portion of work gusset is provided with the hole that is located by connecting (17), in the middle of fire grate segment concave surface one side is provided with spacing (18), rear end spacing (19), the top of fire grate segment convex surface one side, be provided with grafting coal leak preventing lines platforms (20) in the preceding circular arc line, the variable cross-section ventilation slot that medial surface reduces gradually along direction of ventilation is (21) 1., upper plane is provided with variable cross-section ventilation slot 2. (22), upper inner face arc surface is provided with variable cross-section ventilation slot 3. (23), the dynamic pressure of secondary control burning wind pushing air reaches isobaric, realizes the equilibrium of fire grate slip seam air outlet cloth wind.The front portion of circular arc screens gusset (25), front end fixing spacing (26), rear end fixing spacing (27), work gusset was provided with the hole that is located by connecting (28), spacing (29), rear end spacing (30) in the middle of fire grate segment concave surface one side is provided with in the middle of work gusset (24), rear portion were provided with in the middle of sheet (5) bottom, a reciprocating furance row left side was provided with.
Claims (5)
1. non-coal leaking front air-outlet reciprocating furance row that is used for the large suspension-type reciprocal grate, it is characterized in that: its bag connects spacing bearing pin (1), packing ring (2), split pin (3), the left sheet (4) that connects the large reciprocating grate sheet, the right sheet (5) of large reciprocating grate constitutes assembled unit, be installed in water-cooled suspension active advance frame unit respectively, or the unit block on the water-cooled fixed mount unit, be installed in the movable reciprocal grate blade unit (6) on the water-cooled suspension active advance frame unit, hang doing on the reciprocating furance row stator unit (7) on the fixing advance frame unit and back and forth push away the coal motion being installed in water-cooled, realize the poking fire of burning coal layer under the various combustion conditions of promotion, the propelling in coal seam is rolled and is broken burnt burning needs; Combustion air from the isobaric air compartment of fire grate, along fire grate segment work gusset side ventilating duct, after the isobaric processing of the secondary of variable cross-section ventilation slot, enter the dynamic back pressure cavity of ventilation (31), fire grate segment air duct slats seam that reciprocating furance row constitutes, respectively to fire grate segment top, anterior bar seam air outlet even distributing wind; Reciprocating furance row left side sheet (4), the elongated shape 250-400mm of fire grate segment (8), fire grate segment width (9) 25-40mm, the front end section of reciprocating furance row is 130-150mm circular arc (10), constitute 50-60 ° and push away the coal arc chord angle, front end circular arc external surface ventilation slot (11) has ensured front end ventilate uniform performance and cooling performance, the linear air-supply of arc surface preceding article seam air outlet (12); Fundamentally changed in the be heated mechanical strength of direction and fire grate segment of the burning of burning coal layer high-temperature region, improved the burning ventilation condition, given full play to broken Jiao of reciprocating furance row and the fuel bed propulsion characteristic that rolls, promote when stressed, front end becomes an integral unit under the effect that connects limit shaft, can not leak out, leak coal and influence the flameholding operation because of the stressed fork, slit that occurs; Be provided with in the middle of the bottom of reciprocating furance row left side sheet (4) work gusset (13), rear portion be provided with in the middle of circular arc screens gusset (14), circular arc screens gusset (14), front end are that fixing spacing (15), rear end are that the front portion of fixing spacing (16), work gusset is provided with the hole that is located by connecting (17); Spacing (18), rear end spacing (19) in the middle of fire grate segment concave surface one side is provided with, 1. (21), upper plane are provided with the variable cross-section ventilation slot 2. (22), upper inner face, arc surface are provided with variable cross-section ventilation slot 3. (23) to be provided with variable cross-section ventilation slot that grafting coal leak preventing lines platforms (20), medial surface reduce gradually along direction of ventilation in the top of fire grate segment convex surface one side, the preceding circular arc line, the dynamic pressure of secondary control burning wind pushing air reaches isobaric, realizes the equilibrium of fire grate slip seam air outlet cloth wind; The front portion of circular arc screens gusset (25), front end fixing spacing (26), rear end fixing spacing (27), work gusset was provided with the hole that is located by connecting (28), spacing (29), rear end spacing (30) in the middle of fire grate segment concave surface one side is provided with in the middle of work gusset (24), rear portion were provided with in the middle of sheet (5) bottom, a reciprocating furance row left side was provided with.
2. a kind of non-coal leaking front air-outlet reciprocating furance row that is used for the large suspension-type reciprocal grate according to claim 1, it is characterized in that: upper inner face, arc surface are provided with variable cross-section ventilation slot 3. (23), be one-sided setting, only limit to the colm that biology, plant fuel and caloric value are lower than 3000 kilocalories; Variable cross-section ventilation slot 3. (23) can be set to half cone circle, distortion awl flute profile.
3. a kind of non-coal leaking front air-outlet reciprocating furance row that is used for the large suspension-type reciprocal grate according to claim 1, it is characterized in that: be installed in the movable reciprocal grate blade unit (6) on the water-cooled suspension active advance frame unit, hang doing on the reciprocating furance row stator unit (7) on the fixing advance frame unit and back and forth push away coal and move being installed in water-cooled, the propelling that realize to promote the poking fire of various combustion conditions burning coal layer down, coal seam is rolled and break Jiao's burning needs, the reciprocating stroke 60-300 millimeter of working.
4. a kind of non-coal leaking front air-outlet reciprocating furance row that is used for the large suspension-type reciprocal grate according to claim 1 is characterized in that: be provided with grafting coal leak preventing lines platforms (20), upper plane in the top of fire grate segment convex surface one side, the preceding circular arc line and be provided with the variable cross-section ventilation slot 2. (22), grafting coal leak preventing lines platforms (20) nose circle forearc surface are not provided with the variable cross-section ventilation slot; Variable cross-section ventilation slot 2. (22) is that groove is tapered.
5. a kind of non-coal leaking front air-outlet reciprocating furance row that is used for the large suspension-type reciprocal grate according to claim 1, it is characterized in that: be provided with variable cross-section ventilation slot that grafting coal leak preventing lines platforms (20), medial surface reduce gradually along direction of ventilation 1. (21) in the top of fire grate segment convex surface one side, the preceding circular arc line, can be set to half cone circle, distortion awl flute profile.
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| CN201010100168A CN101776274A (en) | 2010-01-25 | 2010-01-25 | Non-coal leaking front air-outlet reciprocating grate segment for large suspension-type reciprocating grate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010100168A CN101776274A (en) | 2010-01-25 | 2010-01-25 | Non-coal leaking front air-outlet reciprocating grate segment for large suspension-type reciprocating grate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607045A (en) * | 2012-04-14 | 2012-07-25 | 大连惠英机械有限公司 | Novel reciprocating fire grate segment |
| CN102788356A (en) * | 2011-05-16 | 2012-11-21 | 马成果 | Quickly assembled and disassembled strip-shaped fire grate |
| CN104235861A (en) * | 2014-10-14 | 2014-12-24 | 济南锅炉集团有限公司 | Labyrinth type reciprocating fire grate segment of grate |
| CN106196077A (en) * | 2016-08-17 | 2016-12-07 | 南通天蓝环保能源成套设备有限公司 | A kind of large-scale domestic waste incineration grate furnace |
| CN106835360A (en) * | 2016-12-21 | 2017-06-13 | 湖南顶立科技有限公司 | Ventilation terminal and pre-oxidation furnace hot air circulating system |
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2010
- 2010-01-25 CN CN201010100168A patent/CN101776274A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788356A (en) * | 2011-05-16 | 2012-11-21 | 马成果 | Quickly assembled and disassembled strip-shaped fire grate |
| CN102607045A (en) * | 2012-04-14 | 2012-07-25 | 大连惠英机械有限公司 | Novel reciprocating fire grate segment |
| CN104235861A (en) * | 2014-10-14 | 2014-12-24 | 济南锅炉集团有限公司 | Labyrinth type reciprocating fire grate segment of grate |
| CN106196077A (en) * | 2016-08-17 | 2016-12-07 | 南通天蓝环保能源成套设备有限公司 | A kind of large-scale domestic waste incineration grate furnace |
| CN106196077B (en) * | 2016-08-17 | 2018-06-29 | 江苏天楹环保能源成套设备有限公司 | A kind of large size domestic waste incineration grate furnace |
| CN106835360A (en) * | 2016-12-21 | 2017-06-13 | 湖南顶立科技有限公司 | Ventilation terminal and pre-oxidation furnace hot air circulating system |
| CN106835360B (en) * | 2016-12-21 | 2019-04-05 | 湖南顶立科技有限公司 | Ventilation terminal and pre-oxidation furnace hot air circulating system |
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Application publication date: 20100714 |