Grate segment for reciprocating grate and reciprocating grate

Abstract

The utility model belongs to the field of boiler combustion equipment, and discloses a grate segment for a reciprocating grate and the reciprocating grate. The fire grate segments are provided with sliding resistance grooves and / or longitudinal bosses on the slope surfaces of the upper inclined sections and / or the slope surfaces of the lower inclined sections, and through the arrangement of the sliding resistance grooves and / or the longitudinal bosses, the reciprocating fire grate can provide multi-wave longitudinal and transverse two-way staggered layer disturbance and staggered layer ignition functions for a carried coal seam; when the slope surface of the declination section of the fire grate moving plate is pushed forwards, forward hedging extrusion can be carried out on a coal seam located between the slope surfaces of the updip sections of the front row of fixed plates, and when the fire grate moving plate retreats, the slope surfaces of the updip sections of the fire grate moving plate can also carry out reverse hedging extrusion on a coal seam located between the declination sections of the rear row of fixed plates, and therefore the strong coke breaking and slag breaking functions are achieved. The coal core surface ash shell can be crushed, oxygen permeation can be promoted, the downward ignition speed of flames in the coal seam can be increased, the effective combustible time of the bottom coal seam in the furnace can be prolonged, the burnout speed of fire carbon and the coal core can be increased, the carbon content of slag can be reduced, and the coal seam operation heat efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of boiler combustion equipment, and in particular relates to a grate sheet used for a reciprocating grate and a reciprocating grate. Background Art

[0002] The reciprocating grate is one of the two mainstream devices of the side-feeding mechanical grate. The coal layer it carries is in an alternating forward and semi-dynamic disturbance combustion state for 1 / 2 of the time period in the furnace. Although the semi-dynamic disturbance combustion method is better than the side-feeding chain grate's non-disturbance static combustion method in the furnace, the semi-dynamic disturbance combustion method still cannot get rid of the following disadvantages brought by the side-feeding coal feeding method:

[0003] (1) After the coal layers carried by the grate are sent into the furnace at the same time, they cannot be put into combustion at the same time. The combustion in the coal layer is that the flame spreads from top to bottom after the surface coal layer is ignited, and the coal particles in each layer are ignited and put into combustion in turn, which causes the effective combustion time of each layer of coal particles in the furnace to decrease from top to bottom;

[0004] (2) Since the air required for combustion in the coal seam is supplied from bottom to top by the wind chamber below the grate, cold convection is formed with the flame in the coal seam in the downward ignition direction; the energy required for ignition in the coal seam mainly relies on the heat radiation and contact conduction between neighbors, which belongs to limited ignition. Therefore, the downward ignition speed of the flame in the coal seam is low, only 0.2-0.5m / h (about 0.06-0.14mm / s, about 0.1mm / s on average);

[0005] (3) According to the different coal qualities and types, the required thickness of the coal seam under the rated load of the boiler, and the downward ignition speed of the flame, it takes 1000-2500 seconds from the ignition of the surface coal seam to the ignition of the bottom coal seam after the new coal is put into the furnace, which accounts for about 30%-69% of the combustible time of the coal seam carried by the grate in the furnace. As a result, the bottom coal seam has insufficient effective combustion time in the furnace, making it difficult to burn out the residual carbon.

[0006] The shortcomings of the above-mentioned side-fed mechanical grate during combustion in the coal seam also constitute the following cause and effect relationship: the time required for ignition from the surface coal seam to the bottom coal seam is inversely proportional to the effective combustible time available in the bottom coal seam in the furnace; the effective combustible time available in each layer of the coal seam is inversely proportional to the carbon content of the slag; the downward ignition speed of the flame in the coal seam is inversely proportional to the carbon content of the slag.

[0007] The existing reciprocating grate technology has the following shortcomings:

[0008] (1) The movement elevation angle of the main grate surface (the grate surface refers to the contact surface between the grate plate and the coal seam, and the main grate surface refers to the section of the grate surface with the most coal seam) of the existing horizontal reciprocating grate is affected by the friction coefficient between coal particles and steel, and is limited by the minimum sliding angle between coal particles and steel, resulting in the maximum movement elevation angle of the main grate surface being limited to less than 19° to prevent the coal seam from sliding down as a whole when the grate plate moves upward. However, the limited movement elevation angle of the main grate surface also results in a small initial combustion inclination angle of the open fire layer in the coal seam after the coal seam is ignited in the surface coal seam, and the coal seam carried by the grate plate cannot be fully utilized during the forward movement of the pitch angle change to improve the utilization rate of the adjacent cosine radiation heat released by the preheating layer in the coal seam to the open fire layer, so as to accelerate the downward ignition speed of the flame in the coal seam.

[0009] (2) The existing inclined reciprocating grate has a small movement angle of the main grate surface of the grate plate because its front and rear rows of grate plates are arranged in a stepped descending pattern. The open flame layer formed after the surface of the new coal layer that enters the furnace later is ignited is always located above the old coal layer that enters the furnace earlier. The heat released by the new coal during the combustion process cannot be used by the old coal layer that enters the furnace earlier when it is ignited. The energy required for the ignition of the new coal in the coal layer after it enters the furnace is always provided unidirectionally by the old coal layer that enters the furnace earlier. During the ignition process inside the coal seam, the utilization rate of the energy released by the new coal during the combustion process is lower than that of the horizontal reciprocating grate, which is not conducive to further improving the downward ignition speed in the coal seam. At the same time, the existing inclined reciprocating grate occupies too much space in the furnace height, which increases the manufacturing cost of the boiler and the workload of the boiler operator, and is not conducive to inspection.

[0010] (3) The head shapes of existing reciprocating grates are similar, and the structures are simple. Most of them are three-stage double obtuse-angle structures, and the disturbance frequency and depth of the coal seam are low. The existing reciprocating grates disturb the coal seam in a way that, when located at 1 / 2 of the stroke distance, the coal seam is subjected to a downward inclination and reverse displacement based on the median running length of the grate surface, and on the basis of the lateral shear displacement, a lateral staggered ignition with a duration of 1 / 2 of the stroke period is provided in the coal seam of the grate ignition section. There are only two disturbances in total, including one lateral shallow staggered ignition. Because the interval between each lateral staggered ignition is large, it is difficult to form a continuous front-to-back combustion slope in a short time, and the overall effect of accelerating the downward ignition speed of the flame in the coal seam is poor.

[0011] (4) The horizontal reciprocating grates and inclined reciprocating grates assembled by the existing various types of reciprocating grate plates lack the ability to perform longitudinal staggered disturbance and longitudinal staggered ignition on the coal seam in terms of overall structural design, which is not conducive to accelerating the downward ignition speed of the flame in the coal seam.

[0012] (5) The horizontal reciprocating grates and inclined reciprocating grates assembled by the existing various types of reciprocating grate plates lack the ability to implement hedging and extrusion on the coal cores and coke slag between the front and rear rows of grate plates, crush the ash shell on the surface of the coal cores to accelerate oxygen penetration, which is not conducive to accelerating the burning speed of the coal cores.

[0013] (6) The ventilation blind corners and disturbance blind corners on the surface of the existing reciprocating grate in the longitudinal and transverse directions are too large, which is not conducive to the combustion of residual carbon in the blind corners of the bottom coal seam.

[0014] In summary, the existing side-fed reciprocating grate has the disadvantage of insufficient effective combustion time of the bottom coal layer in the furnace in terms of coal feeding method, and the existing grate plate has the disadvantage of not being able to provide more effective combustion time for the bottom coal layer and burn out the residual carbon in terms of combustion technology. These two points are also one of the main reasons why the carbon content of the slag in the side-fed mechanical grate layer combustion furnace is difficult to reduce, resulting in incomplete combustion of Q4 solids and heat loss being stuck at the bottleneck of 8%-10% for a long time. Utility Model Content

[0015] The utility model aims to solve at least one technical problem existing in the background technology, and provides a new type of grate sheet and reciprocating grate for reciprocating grates, starting from solving the problems that the effective combustion time of the bottom coal layer in the furnace is insufficient and the residual carbon is difficult to burn out, in the ignition section in the coal seam, the downward ignition speed of the flame in the coal seam is accelerated in exchange for the effective combustion time of each layer of coal in the coal seam in the furnace, and in the combustion section in the coal seam, the burning speed of the fire carbon and the coal core is accelerated in exchange for the burnout rate of the coal particles within the effective combustion time in the furnace, and the method of exchanging speed for time is adopted to reduce the carbon content of the slag under the design load of the side-fed reciprocating grate furnace and the heat loss caused by the incomplete combustion of Q4 solid, thereby effectively improving the operating thermal efficiency of the side-fed reciprocating grate.

[0016] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0017] A grate plate for a reciprocating grate, the grate plate comprising a surface beam and reinforcing ribs arranged at the bottom of the surface beam, the surface beam being provided with a travel section, an upward inclined section slope and a downward inclined section slope in sequence; wherein:

[0018] The upward inclined section slope surface is provided with a plurality of upward inclined section blocking slide grooves, or the upward inclined section slope surface is provided with an upward inclined section longitudinal boss, or the upward inclined section slope surface is provided with an upward inclined section longitudinal boss and the upward inclined section longitudinal boss is provided with a plurality of upward inclined section blocking slide grooves;

[0019] and / or;

[0020] The downward-inclined section slope surface is provided with a plurality of downward-inclined section anti-slip grooves, or the downward-inclined section slope surface is provided with a downward-inclined section longitudinal boss, or the downward-inclined section slope surface is provided with a downward-inclined section longitudinal boss and the downward-inclined section longitudinal boss is provided with a plurality of downward-inclined section anti-slip grooves.

[0021] Furthermore, the angle between the slope of the upward inclined section and the extension line of the travel section is 13°-33°;

[0022] The horizontal angle between the slope surface of the downward-inclined section and the extended line of the travel section is 40°-60°, and the slope surface is inclined forward and downward.

[0023] Furthermore, the length of the slope of the upward inclined section is 0.5-1.5 times the length of the travel section.

[0024] Furthermore, a head thrust section is provided between the upward inclined section slope and the downward inclined section slope;

[0025] With the surface of the travel section and its surface extension line as the baseline, the upward inclined section slope is a grate surface formed by linearly inclining from the front end of the travel section toward the front and upward; the head thrust section is inclined from the front end of the upward inclined section slope toward the rear and downward; the downward inclined section slope is linearly inclined from the lower end of the head thrust section toward the front and downward.

[0026] Furthermore, a lower thrust section and an arc-shaped foot are also provided at the lower end of the downward slope section;

[0027] The lower thrust section is vertically arranged downward, outwardly arranged downward, or inwardly arranged downward from the lower end of the slope of the downwardly inclined section, and an arc-shaped foot is arranged at the lower end of the lower thrust section.

[0028] Furthermore, if: a plurality of upward-inclined section anti-sliding grooves are arranged on the upward-inclined section slope surface, then:

[0029] A head thrust section is also provided between the upward inclined section slope and the downward inclined section slope, and the head thrust section is inclined backward and downward from the front end of the upward inclined section slope; at the same time, the upward inclined section slope and the head thrust section are connected through the head lower cutting angle;

[0030] If: the inclined section slope surface is provided with an inclined section longitudinal boss and the inclined section longitudinal boss is provided with a plurality of inclined section blocking slide grooves, then:

[0031] The lower end of the upward inclined section longitudinal boss is provided with an upward inclined slope surface, and the upper end is provided with an arc-shaped lower cut corner of the head of the upward inclined section longitudinal boss. A plurality of upward inclined section anti-slip grooves are provided on the slope surface between the upward inclined section longitudinal boss and the arc-shaped lower cut corner of the head of the upward inclined section longitudinal boss at the upper end;

[0032] If: a number of downward-inclined anti-slip grooves are provided on the downward-inclined slope surface, then:

[0033] A downward slope surface is arranged at the upper end of the downward slope surface, and a plurality of downward slide-blocking grooves are arranged on the downward slope surface;

[0034] If: a downward-sloping longitudinal boss is provided on the downward-sloping slope surface and a plurality of downward-sloping sliding-blocking grooves are provided on the downward-sloping longitudinal boss, then:

[0035] The upper end of the longitudinal boss of the downward-inclined section is a downward-sloping slope surface, and the lower end is connected to the lower thrust section, and a plurality of downward-inclined section anti-slip grooves are arranged in the middle.

[0036] Furthermore, if: a plurality of upward-inclined section anti-sliding grooves are arranged on the upward-inclined section slope surface, then:

[0037] A head thrust section is also provided between the upward inclined section slope and the downward inclined section slope, and the head thrust section is inclined backward and downward from the front end of the upward inclined section slope; at the same time, the upward inclined section slope and the head thrust section are connected through a head lower cutting angle, and the head lower cutting angle is an acute angle, and the inner angle between the head thrust section and the upward inclined section slope is an acute angle less than 90°, and the height of the head thrust section is 10-40 mm;

[0038] If: a number of downward-inclined anti-slip grooves are provided on the downward-inclined slope surface, then:

[0039] A downward slope surface is arranged at the upper end of the downward slope surface, a plurality of downward slide-blocking grooves are arranged on the downward slope surface, and the downward slope angle of the downward slope surface is less than 45°;

[0040] If: a downward-sloping longitudinal boss is provided on the downward-sloping slope surface and a plurality of downward-sloping sliding-blocking grooves are provided on the downward-sloping longitudinal boss, then:

[0041] The upper end of the downward-inclined longitudinal boss is a downward-inclined slope surface, and the lower end is connected to the lower thrust section, with a plurality of downward-inclined slide-blocking grooves arranged in the middle; the downward-inclined angle of the downward-inclined slope surface is less than 45°.

[0042] Furthermore, the inner shape of the upward inclined section resistance slide groove is an arc hook shape, a V shape or a folded hook shape; the bottom depth of the upward inclined section resistance slide groove is 2-15 mm, and the longitudinal length of the groove opening is 15-50 mm;

[0043] The downward-inclined section-blocking slide groove comprises an arc-shaped groove head at the upper end and a groove bottom inclined downward, and the groove bottom slope angle of the downward-inclined section-blocking slide groove is smaller than the downward-inclined section slope angle of the downward-inclined section slope.

[0044] Furthermore, the front end head height of the grate piece includes an upper section height and a lower end height, wherein the upper section height refers to: the vertical height between the extension line of the travel section and the top end of the grate piece; the lower section height refers to: the vertical height between the extension line of the travel section and the bottom end of the grate piece; the sum of the upper and lower section height values ​​is the front end head height of the grate piece;

[0045] The front end head height of the grate piece is 100-250mm.

[0046] At the same time, the utility model also provides a reciprocating grate, including a plurality of rows of grate sheet groups, each row of grate sheet groups includes A-type grate sheets and B-type grate sheets, each row of grate sheet groups is composed of A-type grate sheets and B-type grate sheets arranged adjacent to each other in a staggered manner in a transverse direction, and at the same time, the A-type grate sheets and the B-type grate sheets in the front and rear rows of grate sheet groups are arranged one by one in a longitudinal direction or staggered;

[0047] The A-type grate plate and the B-type grate plate both include a surface beam and a reinforcing rib arranged at the bottom of the surface beam, and the surface beams of the A-type grate plate and the B-type grate plate are sequentially provided with a travel section, an upward inclined section slope and a downward inclined section slope;

[0048] A plurality of upward-inclined section blocking slide grooves are arranged on the upward-inclined section slope of the A-type grate plate;

[0049] An upward inclined section longitudinal boss is arranged on the upward inclined section slope surface of the B-type grate plate, and a plurality of upward inclined section blocking slide grooves are arranged on the upward inclined section longitudinal boss.

[0050] Furthermore, in the A-type grate slice and the B-type grate slice, a head thrust section is further provided between the upward slope section and the downward slope section; a lower thrust section and an arc-shaped foot are further provided at the lower end of the downward slope section;

[0051] With the surface of the travel section and its surface extension line as the baseline, the upward inclined section slope is a grate surface formed by linearly inclining from the front end of the travel section toward the front and upward; the head thrust section is inclined toward the rear and downward from the front end of the upward inclined section slope; the downward inclined section slope is linearly inclined toward the front and downward from the lower end of the head thrust section; the lower thrust section is vertically arranged downward, outwardly arranged downward, or inwardly arranged downward from the lower end of the downward inclined section slope, and the lower end of the lower thrust section is provided with an arc-shaped foot.

[0052] Furthermore, the inner angle between the head thrust section and the upward inclined section slope of the A-type grate slice and the B-type grate slice is an acute angle less than 90°, and the height of the head thrust section is 10-40 mm.

[0053] Furthermore, the upward slope of the A-type grate plate is connected to the head thrust section through a head lower cut angle, and the head lower cut angle is an acute angle;

[0054] The lower end of the inclined section longitudinal boss of the B-type grate plate is provided with an upward inclined surface, and the upper end is provided with an arc-shaped lower cutting angle of the head of the inclined section longitudinal boss. A plurality of inclined section anti-slip grooves are provided on the inclined surface between the upward inclined surface of the inclined section longitudinal boss and the arc-shaped lower cutting angle of the head of the inclined section longitudinal boss at the upper end.

[0055] Furthermore, when the fuel used by the grate is straw biomass fuel and is used for garbage incineration, the shape of the arc-shaped lower cut corner of the head of the B-type grate piece is changed to an acute angle shape structure.

[0056] Furthermore, in the B-type grate sheet:

[0057] The bottom slope length of the upward-inclined longitudinal boss is less than or equal to the length of the upward-inclined slope, the bottom slope width of the upward-inclined longitudinal boss is equal to the width of the grate, and the upper slope line of the upward-inclined longitudinal boss is parallel to the slope line of the upward-inclined slope; and / or,

[0058] The height of the longitudinal boss of the upward inclined section is 10-35 mm; the angle between the upward slope surface at the lower end of the longitudinal boss of the upward inclined section and the extension line of the stroke section is 40°-50°.

[0059] Furthermore, the inner shape of the upward inclined section slide groove is an arc hook shape, a V shape or a folded hook shape;

[0060] The bottom depth of the upward-inclined slide groove is 2-15 mm, and the longitudinal length of the groove is 15-50 mm;

[0061] The number of the upward inclined section resistance slide grooves on the upward inclined section slope of the A-type grate piece and the upward inclined section longitudinal boss of the B-type grate piece is 1-10, and two adjacent upward inclined section resistance slide grooves are directly connected or spaced apart.

[0062] Furthermore, the downwardly inclined slope of the A-type grate slice and the B-type grate slice is a grate surface which is inclined forward and downward and has a horizontal angle of 40°-60° with the extended line of the stroke section.

[0063] Furthermore, a downward-inclined longitudinal boss is arranged on the downward-inclined slope of the A-type grate plate; the upper end of the downward-inclined longitudinal boss is a downward-inclined slope, the lower end is connected to the lower thrust section, and a plurality of downward-inclined slide-blocking grooves are arranged in the middle;

[0064] The upper end of the downward slope of the B-type grate plate is provided with a downward slope, and a plurality of downward slide-blocking grooves are provided on the downward slope of the B-type grate plate.

[0065] Furthermore, the downward inclination angles of the downward slope surfaces of the A-type grate slices and the B-type grate slices are both less than 45°.

[0066] Furthermore, the downward-inclined section-blocking slide groove of the A-type grate plate and the B-type grate plate includes an arc-shaped groove head at the upper end and a groove bottom slanting downward, and the groove bottom slope angle of the downward-inclined section-blocking slide groove is smaller than the downward-inclined section slope angle of the downward-inclined section slope.

[0067] Further, the front end head height of the A-type grate slice and the B-type grate slice includes an upper section height and a lower end height, wherein the upper section height refers to: the vertical height between the extension line of the travel section and the top of the A-type grate slice or the B-type grate slice; the lower section height refers to: the vertical height between the extension line of the travel section and the bottom of the A-type grate slice or the B-type grate slice; the sum of the upper and lower section height values ​​is the front end head height of the A-type grate slice and the B-type grate slice;

[0068] The front end head height of the A-type grate slice and the B-type grate slice is 100-250 mm.

[0069] Furthermore, the A-type grate slices and the B-type grate slices are arranged in a staggered manner in the same row transversely, and in a front-to-rear row longitudinally opposite to each other or staggered;

[0070] The grate is provided with side pieces along one or both sides in the lateral direction. The side pieces are adjustment pieces designed based on the A-type grate piece and / or the B-type grate piece, having the same structure as the parent piece and adjustable lateral width.

[0071] Furthermore, the A-type grate slices and the B-type grate slices are arranged in a staggered manner in the same row transversely and semi-staggered in the longitudinal direction;

[0072] The longitudinal semi-offset arrangement means that the width of type A grate slices and type B grate slices are the same, and the lateral offset distance between type A grate slices / type B grate slices in the front grate slices and type B grate slices / type A grate slices in the rear grate slices is: 1 / 2 width of type A grate slices / type B grate slices.

[0073] Compared with the prior art, the beneficial effects produced by the utility model are:

[0074] (1) The reciprocating grate of the utility model is composed of A-type and B-type grate plates which are staggered horizontally and arranged one by one or staggered vertically; the surface beams of the A-type and B-type grate plates are sequentially provided with a travel section, an upward inclined section slope and a downward inclined section slope; the upward inclined section slope of the A-type grate plate is provided with a plurality of upward inclined section blocking slide grooves; the upward inclined section slope of the B-type grate plate is provided with an upward inclined section longitudinal boss, and the upward inclined section longitudinal boss is provided with a plurality of upward inclined section blocking slide grooves; the above structural design can provide the carried coal seam with multi-wave longitudinal and transverse bidirectional staggered layer disturbance and staggered layer ignition function; at the same time When the downward slope of the grate moving piece moves forward, it can carry out positive counter-extrusion on the coal seam between the upward slope of the front fixed piece. When it moves backward, the upward slope of the grate moving piece can carry out reverse counter-extrusion on the coal seam between the downward slope of the rear fixed piece. Therefore, it has strong coke breaking and slag breaking functions, which is beneficial to crush the ash shell on the surface of the coal core, promote oxygen penetration, help to speed up the downward ignition speed of the flame in the coal seam, increase the effective combustion time of the bottom coal seam in the furnace, speed up the burning speed of the fire carbon and coal core, and reduce the carbon content of the slag.

[0075] (2) According to the cosine law, the utility model increases the initial combustion inclination angle of the open fire layer in the coal seam by increasing the movement elevation angle or inclination angle of each section of the grate surface of the grate plate, increases the utilization rate of the adjacent cosine radiation energy of the open fire layer to the preheating layer, accelerates the downward ignition speed of the flame in the coal seam, and thus greatly increases the effective combustion time of the bottom coal seam in the furnace;

[0076] (3) When designing and manufacturing the grate, additional structural settings are provided to enable staggered ignition of the coal seam in both the longitudinal and transverse directions (upward longitudinal boss, downward longitudinal boss, upward blocking slide groove, downward blocking slide groove, head lower cut angle or head arc-shaped lower cut angle, head thrust section, lower thrust section, arc-shaped bottom foot and other structural settings). During staggered ignition, the upper and lower positions of the open flame layer and the preheating layer in the coal seam are exchanged. During the exchange time period, adjacent radiation, adjacent staggered contact heat exchange, and adjacent high-temperature flue gas convection heat exchange are introduced in the staggered section to accelerate the downward ignition speed of the flame in the staggered ignition section, thereby increasing the effective combustible time of the bottom coal seam in the staggered ignition section in the furnace;

[0077] (4) On the basis of adding a structure to the grate to ignite the coal seam in the longitudinal and transverse directions, the disturbance intensity and frequency inside the coal seam are increased, the ventilation blind corner area and disturbance blind corner area in the longitudinal and transverse directions of the coal seam during movement are reduced, and the burning speed of the fire carbon is accelerated;

[0078] (5) When designing and assembling the grate plates, a "thrust surface" and a "front row reverse thrust surface" structure design are added between the front and rear rows of grate plates to counter-extrude, displace, and crush the ash shell on the surface of the fire carbon coal core. The coke and slag breaking functions are strong, oxygen penetration is promoted, and residual carbon is burned out. In combination with the above-mentioned staggered ignition and staggered disturbance design, the conditions for the formation of large pieces of coke slag in the coal seam are destroyed, the inter-particle dislocation frequency and disturbance intensity between coal particles in the coal seam are increased, the burning speed of the coal core is accelerated, and the carbon content of the slag is reduced;

[0079] (6) The reciprocating grate provided by the utility model has a wide range of applicable coal types and can also be used for the combustion of various biomass fuels, or further expanded to be used in waste incineration boilers. It can effectively make up for the defect of the existing side-fed mechanical grate layer combustion furnace bottom coal layer in the furnace that the effective combustion time is insufficient, and further improve the thermal efficiency of the boiler operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 This is a front view of the A-type grate in the embodiment of the utility model;

[0081] Figure 2 A top view of a type A grate in an embodiment of the utility model;

[0082] Figure 3 This is a side view of the head of the A-type grate in the embodiment of the utility model;

[0083] Figure 4 for Figure 1 A-A sectional view;

[0084] Figure 5 This is a front view of a B-type grate sheet in an embodiment of the utility model;

[0085] Figure 6 A top view of a B-type grate in an embodiment of the utility model;

[0086] Figure 7 This is a side view of the head of the B-type grate in the embodiment of the utility model;

[0087] Figure 8 It is a top view of the embodiment of the utility model in which the A-type and B-type grate plates are arranged in a staggered manner in the same row horizontally and in a semi-staggered arrangement in the front and rear rows vertically;

[0088] Fig. 9 It is a head side view of the embodiment of the utility model in which the A-type and B-type grate plates are arranged in a staggered manner in the same row horizontally and in a semi-staggered arrangement in the front and rear rows vertically;

[0089] Fig.10 It is a top view of the embodiment of the utility model in which the A-type and B-type grate plates are arranged in a staggered manner in the same row horizontally and the front and rear rows are arranged opposite to each other in the vertical direction;

[0090] Fig.11 It is a schematic diagram of the structure of the A-type and B-type grate plates in the embodiment of the utility model when they are arranged in a staggered manner in the horizontal direction and arranged in a one-to-one or semi-staggered manner in the longitudinal direction;

[0091] Markings in the figure: 1—surface beam; 2—travel section; 3—inclined section slope; 4—inclined section longitudinal boss, 4.1—upward slope, 4.2—arc-shaped lower cutting angle of the head; 5—inclined section blocking groove; 6—downward section blocking groove; 7—head lower cutting angle; 8—head thrust section; 9—downward section slope, 9.1—downward slope, 9.2—downward section longitudinal boss; 10—lower thrust section; 11—arc-shaped foot; 12—reinforcement rib, 12.1—head limit hole, 12.2—tail limit hole; 13—side strip tenon, 13.1—side strip tenon groove; 15—U-shaped slot; 16—first side block, 16.1 second side block. DETAILED DESCRIPTION

[0092] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0093] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0094] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0095] Example 1

[0096] Combination Figure 1 As shown in FIG. 11 , an embodiment of the utility model provides a reciprocating grate, comprising a plurality of rows of grate plate groups, each row of grate plate groups comprising type A grate plates and type B grate plates (referred to as A plates and B plates in the figure), each row of grate plate groups is composed of type A grate plates and type B grate plates arranged adjacent to each other in a staggered manner in a transverse direction, and at the same time, the type A grate plates and type B grate plates in the front and rear rows of grate plate groups are arranged one by one opposite to each other or staggered in a longitudinal direction.

[0097] In an embodiment of the utility model, side pieces are further provided along one or both lateral sides of the grate, and the side pieces are adjustment pieces designed based on type A grate pieces and / or type B grate pieces, have the same structure as the parent piece and have adjustable lateral width, and can be adjusted according to actual usage requirements.

[0098] Wherein, the structure of the A-type grate sheet is as follows Figure 1 As shown in FIG. 4, the structure of the B-type grate sheet is as follows: Figure 5 The A-type grate sheet and the B-type grate sheet both include a face beam 1 and a reinforcing rib 12 arranged at the bottom of the face beam 2, the reinforcing rib 12 is vertically arranged at the bottom of the face beam 1, and the face beam 1 includes a travel section 2, an upward inclined section slope 3, a head thrust section 8, a downward inclined section slope 9, a lower thrust section 10, and an arc-shaped foot 11 in sequence. Taking the surface of the stroke section 2 and its surface extension line as the baseline, the upward inclined section slope 3 is a grate surface formed by linearly inclining from the front end of the stroke section 2 to the front and upward, and the angle α between the upward inclined section slope 3 and the extension line of the stroke section 2 is: 13°-33°; the head thrust section 8 is inclined backward and downward from the front end of the upward inclined section slope 3; the downward inclined section slope 9 is linearly inclined forward and downward from the lower end of the head thrust section 8; the lower thrust section 10 is set downward from the lower end of the downward inclined section slope 9, and can be set to be vertically downward, outwardly inclined downward or inwardly inclined downward according to the working conditions. In the embodiment of the utility model, the lower thrust section 10 is vertically downward from the lower end of the downward inclined section slope 9; the lower end of the lower thrust section 10 is provided with an arc-shaped arc foot 11.

[0099] In the A-type grate sheet and the B-type grate sheet, the angle α between the upward slope 3 and the extension line of the travel section 2 is 13°-33°. The advantages of this arrangement are:

[0100] (1) According to the cosine law, increasing the slope angle of the up-slope section and the movement elevation angle of the up-slope section is equivalent to increasing the combustion slope angle of the open fire layer in the coal seam carried by this section, which can improve the utilization rate of the cosine radiation energy released by the up-slope open fire layer to the adjacent preheating layer, and can accelerate the downward ignition speed of the up-slope section flame;

[0101] (2) At the same time, this can improve the ability of the reverse thrust surface to counter-extrude the coke slag and coal cores between the front and rear rows of grate surfaces. The inter-particle displacement caused by the counter-extruded grate helps to crush the ash shell on the surface of the coal core, promote oxygen penetration, and accelerate the burning speed of the coal core.

[0102] Meanwhile, in the A-type grate slice and the B-type grate slice, the length of the upward inclined slope 3 can be designed according to different design requirements. Preferably, the length of the upward inclined slope 3 is 0.5-1.5 times the length of the reciprocating stroke section 2.

[0103] In addition to the same structural design as above, the A-type grate sheet and the B-type grate sheet also have the following different structural designs:

[0104] For the upslope 3:

[0105] A plurality of upward-inclined section blocking slide grooves 5 are arranged on the upward-inclined section slope 3 of the A-type grate plate; the upward-inclined section slope 3 of the A-type grate plate is connected to the head thrust section 8 through an acute-angled head lower cut corner 7.

[0106] An upward inclined section longitudinal boss 4 is arranged on the upward inclined section slope surface 3 of the B-type grate plate, the lower end of the upward inclined section longitudinal boss 4 is provided with an upward inclined slope surface 4.1, and the upper end is provided with an arc-shaped lower cutting angle 4.2 of the head of the upward inclined section longitudinal boss, and a plurality of upward inclined section anti-slip grooves 5 are arranged on the slope surface between the upward inclined section longitudinal boss upward inclined surface 4.1 and the arc-shaped lower cutting angle 4.2 of the head of the upward inclined section longitudinal boss at the upper end.

[0107] The upward inclined section slope 3 of the B-type grate plate is provided with an upward inclined section longitudinal boss 4. The functions and benefits of such a setting are:

[0108] (1) In some embodiments, Fig.10As shown, when the A-type grate slices and the B-type grate slices are arranged in a staggered manner in the same row horizontally and staggered in the vertical direction (i.e., each row of grate slice groups is composed of A-type grate slices and B-type grate slices arranged adjacent to each other horizontally and staggered, and at the same time, the A-type grate slices and B-type grate slices of the front and rear rows of grate slice groups are arranged semi-staggered in the vertical direction), the longitudinal boss 4 of the upward inclined section is similar to the upwardly arranged strip rake teeth, which rakes the coal seam passing through the upward inclined section from bottom to top, divides the originally flat fire bed to the left and right, and separates it by staggering up and down; the open fire layer on the upward inclined section slope 3 of the A-type grate slice located at the lower position after separation ignites the black coal layer on the longitudinal boss 4 of the B-type grate slice located at the higher position in the longitudinal adjacent staggered layer for a time equal to or less than the reciprocating stroke period. Due to the vertical misalignment between the open fire layer and the black coal layer in the coal seam during staggered ignition, the open fire layer below will bring adjacent cosine radiation heat, adjacent contact heat conduction, and adjacent flue gas convection heat transfer to the adjacent black coal layer to ignite the small-sized coal particles in the adjacent black coal layer, which is used to accelerate the downward ignition speed of the flame in the coal seam;

[0109] (2) At the same time, when the front and rear grate plates make reciprocating motion, the upward slope surface 4.1 at the lower end of the upward inclined section longitudinal boss 4 can strongly impact and squeeze the bottom coal seam located between the two with the lower thrust section 10 of the rear grate plate, and strongly displace the coal particles in the coal seam from bottom to top, crushing the ash shell on the surface of the coal core and accelerating the burning speed of the coal core;

[0110] (3) In addition, when the front and rear grate plates make reciprocating motion, the upward inclined longitudinal boss 4 of the B-type grate plate and the upward inclined slope 3 of the A-type grate plate can act as a reverse thrust surface, which can strongly impact and squeeze the bottom coal seam located between the two, and strongly displace the coal particles in the coal seam from bottom to top, crush the ash shell on the surface of the coal core, and accelerate the burning speed of the coal core.

[0111] In some embodiments, the structural design of the upward inclined longitudinal boss 4 of the B-type grate plate is as follows:

[0112] The bottom slope length of the upward-inclined longitudinal boss 4 is less than or equal to the length of the upward-inclined slope 3, the bottom slope width of the upward-inclined longitudinal boss 4 is equal to the width of the grate, the upper slope line of the upward-inclined longitudinal boss 4 is parallel to the slope line of the upward-inclined slope 3, and the height of the upward-inclined longitudinal boss 4 can be 10-35 mm according to different design requirements. The upward-inclined longitudinal boss 4 is directly connected and cast as one body with the upward-inclined slope 3. The angle between the upward slope 4.1 at the lower end of the upward-inclined longitudinal boss 4 and the extension line of the stroke section 2 can be 40°-50° according to different design requirements.

[0113] A plurality of upward-inclined section blocking slide grooves 5 are arranged on the upper surfaces of the upward-inclined section slope 3 of the A-type grate piece and the upward-inclined section longitudinal boss 4 of the B-type grate piece. The functions and benefits of such arrangement are:

[0114] (1) When the movement elevation angle of the coal seam carried by the upward inclined section slope 3 of the A-type grate piece and the upward inclined section longitudinal boss 4 of the B-type grate piece in the reciprocating motion of the grate piece is greater than the minimum sliding angle between the coal particles and the metal grate surface, the upward inclined section blocking slide groove 5 can prevent the coal seam from sliding down as a whole, so that the carried coal seam can move in the angle range between greater than the minimum sliding angle of the grate and less than the dynamic accumulation angle of the coal particles, effectively increasing the adjacent cosine radiation coefficient of the open fire layer in the coal seam to the preheating layer, and accelerating the downward ignition speed of the flame in the coal seam carried by the upward inclined section slope 3 of the A-type grate piece and the upward inclined section longitudinal boss 4 of the B-type grate piece;

[0115] (2) The coal particles in the coal seam carried by the upward slope 3 of the A-type grate are stabilized on the upward slope 3 of the A-type grate and the longitudinal boss 4 of the upward slope of the B-type grate by the upward slide groove 5 to form a metastable layer; when competing with the coal seam sliding down the downward slope 9 for the gap area formed by the reciprocating motion of the stroke section 2, the coal particles in the unstable layer above the dynamic accumulation angle slope can slide along the dynamic accumulation angle slope with a higher fire carbon content to the gradually opening gap area formed by the reciprocating motion of the stroke section 2, carrying the fire to sink, thereby accelerating the downward ignition speed of the flame in the coal seam;

[0116] (3) When the metastable layer below the dynamic accumulation angle slope line and the unstable layer above the dynamic accumulation angle slope line in the coal seam carried by the upward inclined section slope 3 of the A-type grate plate and the upward inclined section longitudinal boss 4 of the B-type grate plate experience an inclined surface instability dislocation between the upper and lower layers, the upward inclined section anti-slide groove 5 can stabilize the metastable layer, which is helpful to repair the wind tunnel crater in the coal seam.

[0117] The upward inclined section resistance slide 5 should not only prevent the coal seam from sliding down, but also let the coal particles that fall into the groove move with the coal seam under the thrust of the grate, and rely on the internal friction of the coal seam to bring out the upward inclined section resistance slide 5. In some embodiments, the groove shape of the upward inclined section resistance slide 5 can be a circular arc hook shape, a V shape or a folded hook shape, the groove bottom depth can be 2-15mm according to different design requirements, and the longitudinal length of the groove mouth can be 15-50mm. The number of the upward inclined section resistance slide 5 on the upward inclined section slope 3 of the A-type grate plate and the upward inclined section longitudinal boss 4 of the B-type grate plate can be tried according to different design requirements. For example, 1-10 upward inclined section resistance slides 5 can be set, and two adjacent upward inclined section resistance slides 5 can be directly connected or spaced.

[0118] At the front end of the A-type grate sheet and the B-type grate sheet, a head lower cutting angle 7 and a head arc lower cutting angle 4.2 are respectively set. The functions and benefits of such settings are:

[0119] (1) In the ignition section at the front of the grate, when the coal seam carried by the upward inclined section slope 3 (A-type grate sheet) and the upward inclined section longitudinal boss 4 (B-type grate sheet) passes over the grate head under the action of thrust, the head lower cut angle 7 or the head arc lower cut angle 4.2 can perform a lateral staggered shear in a dynamic motion with a time of 1 / 2 of the reciprocating stroke segment period and a depth less than or equal to the head thrust segment 8 on the coal seam carried by the upward inclined section slope 3 (A-type grate sheet) and the upward inclined section longitudinal boss 4 (B-type grate sheet), and receive a lateral static staggered ignition with a time of 1 / 2 of the reciprocating stroke segment period on the basis of the lateral gravity shear, which is beneficial to improve the ignition speed;

[0120] (2) In the middle and rear part of the grate, when the red soft coke slag from the upward inclined section slope 3 (A-type grate sheet) and the upward inclined section longitudinal boss 4 (B-type grate sheet) passes over the grate head under the action of thrust, the head lower cutting angle 7 or the head arc lower cutting angle 4.2 is used to perform gravity folding and stretching of the red soft coke slag layer. The dynamic transverse gravity staggered shearing in the movement with a time of 1 / 2 of the reciprocating stroke segment cycle and the static folding, stretching and transverse staggered shearing with a time of 1 / 2 of the reciprocating stroke segment cycle are simultaneously implemented, which is conducive to destroying the formation conditions of large pieces of plate coke and plate slag;

[0121] (3) The arc-shaped lower cutting angle 4.2 set at the front end of the B-type grate piece can also play the following role: guide the coal seam on the upward-inclined longitudinal boss 4 to drop to the same horizontal height as the lower cutting angle 7 of the head of the adjacent A-type grate piece, so as to avoid that when the longitudinal resetting and ignition in the layer is carried out on the downward-inclined slope 9, the fire on the upward-inclined longitudinal boss 4 is grabbed by the adjacent coal particles falling from the lower cutting angle 7 of the head of the A-type grate piece on the left and right sides due to the different height difference during the falling process, forcing the fire to float up, thereby affecting the longitudinal staggered resetting and ignition effect and the downward ignition speed of the flame in the layer.

[0122] In some other embodiments, when the grate uses straw biomass fuel and is used for waste incineration, the shape of the arc-shaped undercut angle 4.2 set at the front end of the B-type grate plate can be changed to the same acute-angle shape as the undercut angle 7 of the A-type grate plate.

[0123] The front end of the A-type grate sheet and the B-type grate sheet is provided with a head thrust section 8. The functions and benefits of such a setting are:

[0124] (1) The head thrust section 8 can cooperate with the head lower cutting angle 7 of the A-type grate piece and the head arc lower cutting angle 4.2 of the B-type grate piece to implement horizontal gravity shearing and staggered ignition in the coal seam;

[0125] (2) The head thrust section 8 can increase the effective thrust in the horizontal direction of the grate head;

[0126] (3) When large pieces of coke slag in the coal seam slide upward along the slope 9 of the downward inclined section of the grate during the counter-extrusion process, the head thrust section 8 can increase the interception resistance;

[0127] (4) When the front and rear grate plates are used to counteract and squeeze the large pieces of coke slag in the coal seam during the reciprocating motion, the head thrust section 8 can cooperate with the upward-inclined section blocking slide groove 5 of the front grate plate to act as a jaw, thereby increasing the bite force of the front and rear grate plates on the large pieces of coke slag.

[0128] In some embodiments, the inner angle between the head thrust section 8 provided at the front end of the A-type grate slice and the B-type grate slice and the upward inclined section slope 3 is an acute angle less than 90°, and the height of the head thrust section 8 is 10-40 mm.

[0129] For the downslope 9:

[0130] The downwardly inclined slope 9 provided at the front end of the A-type grate piece and the B-type grate piece is a grate surface inclined forward and downward with a horizontal angle β of 40°-60° with the extension line of the travel section 2.

[0131] A downward-inclined longitudinal boss 9.2 is arranged on the downward-inclined slope surface 9 of the A-type grate plate, the upper end of the downward-inclined longitudinal boss 9.2 is a downward-inclined slope surface 9.1, and the lower end is connected to the lower thrust section 10, and a plurality of downward-inclined anti-slide grooves 6 are arranged in the middle.

[0132] The upper end of the downward-inclined slope 9 of the B-type grate plate is provided with a downward-inclined slope 9.1, and a plurality of downward-inclined slide grooves 6 are provided on the downward-inclined slope 9 of the B-type grate plate.

[0133] The downward inclination angles of the downward slope surfaces 9.1 of the A-type grate slices and the B-type grate slices are both less than 45°.

[0134] The functions and benefits of the above structural settings are:

[0135] (1) Increasing the downward angle of the downward slope 9 can allow the open fire layer in this section of the coal seam to provide more cosine radiation energy to the adjacent preheating layer during the ignition process, thereby accelerating the downward ignition speed of the flame in the coal seam;

[0136] (2) Increasing the downward inclination angle of the downward inclination section slope 9 can reduce the clamp angle between the upward inclination section slope 3 (type A grate) of the front grate and the upward inclination section longitudinal boss 4 (type B grate), thereby increasing the impact and extrusion force that the grate can exert on the large pieces of coke slag between the front and rear grate during reciprocating motion, thereby improving the coke and slag breaking capacity of the grate and expanding the applicable range of the grate for different solid fuels;

[0137] (3) A downward-inclined longitudinal boss 9.2 with a height of 10-25 mm is added to the downward-inclined slope 9 of the A-type grate plate, and longitudinal staggered ignition can be implemented on the downward-inclined slope 9 to further accelerate the downward ignition speed of the flame in the coal seam;

[0138] (4) The downward inclination angle of the downward slope surface 9.1 is controlled to be less than 45°, so that the corresponding movement inclination angle of the downward slope surface 9.1 is controlled to be less than 30°, which helps to slow down the sliding speed of the coal seam on the downward slope surface 9, support the coal seam, and avoid exposing the head undercut angle 7 and the head arc undercut angle 4.2 to the furnace flame and burning.

[0139] The downward-inclined section-blocking slide groove 6 of the A-type grate plate and the B-type grate plate includes an arc-shaped groove head at the upper end and a groove bottom inclined downward, and the groove bottom slope angle of the downward-inclined section-blocking slide groove 6 is smaller than the downward-inclined section slope angle of the downward-inclined section slope 9; the effects and benefits of such a setting are:

[0140] (1) The downward-inclined section blocking slide groove 6 can be combined with the downward-inclined section slope 9 to form a sawtooth downward-inclined slope. When the sawtooth downward-inclined slope 6, the upward-inclined section slope 3 (type A grate) of the front grate and the upward-inclined section longitudinal boss 4 (type B grate) are used to counter-extrude the large coke slag between the front and rear grate rows during reciprocating motion, the large coke slag can be prevented from sliding backward and upward along the downward-inclined section slope to avoid unloading the counter-extruded extrusion force in the horizontal direction. The sawtooth downward-inclined slope is conducive to improving the ability of the grate to crush the large coke slag.

[0141] (2) A downward-sloping section resistance slide groove 6 is provided on the downward-sloping section slope 9. The groove bottom slope angle of the downward-sloping section resistance slide groove 6 is smaller than the downward-sloping section slope angle of the downward-sloping section slope 9. When the groove head of the downward-sloping section resistance slide groove 6 faces upward, the groove bottom slope is larger than the sliding angle between the coal particles and the metal surface, and coal ash is not easily accumulated on the upper part of the groove head. By utilizing this feature, the downward-sloping section resistance slide groove 6 can also serve as a dynamic grate surface transverse ventilation groove with a time of 1 / 2 of the reciprocating stroke period;

[0142] (3) The downward-sloping section blocking chute 6 has a lower bottom slope angle than the downward-sloping section slope 9, which can be used as a gentle step of the downward-sloping section slope 9 to reduce the downward slope angle of the local slope, support the coal seam, and prevent the grate head from being exposed to the furnace flame and burning after the coal seam is burned and thinned;

[0143] (4) By utilizing the vertical drop between the top of each downward-inclined section of the blocking slide 6 and the bottom of the trough, the gravity shear frequency of the shallow horizontal staggered layers and the number of ignition times of the shallow horizontal staggered layers in the coal seam can be increased, as well as the frequency of the dislocation disturbance between particles can be increased; at the same time, the downward-inclined section of the blocking slide 6 of the A-type grate plate can also form a criss-cross multi-layered staggered layer ignition and staggered layer disturbance slope with the downward-inclined section longitudinal boss 9.2 of the A-type grate plate, further accelerating the downward ignition speed of the flame in the coal seam.

[0144] In some embodiments, the number of the down-slope blocking slide 6 on the down-slope slope 9 or the down-slope longitudinal boss 9.2 can be set according to different design requirements, such as: the number of the down-slope blocking slide 6 on the down-slope slope 9 or the down-slope longitudinal boss 9.2 can be 1-6.

[0145] The A-type grate sheet and the B-type grate sheet are provided with a lower thrust section 10 at the lower end of the downward slope 9. The functions and benefits of such a setting are:

[0146] (1) The lower thrust section 10 can push the bottom coal seam forward;

[0147] (2) The lower thrust section 10 can provide a horizontal dynamic gravity shearing time of 1 / 2 of the reciprocating stroke section period in the coal seam during the reciprocating motion of the grate, and provide a horizontal static staggered ignition condition of 1 / 2 of the reciprocating stroke period and a staggered height less than that of the thrust section;

[0148] (3) The lower thrust section 10 can form a clamp-shaped counter-extrusion surface with a clamp angle of 70°-90° with the upward slope 3 of the front A-type grate, forcing the fire carbon particles located in the extrusion surface to form an inter-particle displacement from bottom to top, crushing the ash shell on the surface of the fire carbon and accelerating the burning speed of the coal core;

[0149] (4) The lower thrust section 10 can form a 25°-55° clamp-shaped impact extrusion surface with the upward slope surface 4.1 at the lower end of the upward inclined section longitudinal boss 4 of the front row of B-type grate slices, forcing the fire carbon particles located in the extrusion surface to shift upward from bottom to top or to shift horizontally between particles into the coal layer carried by the adjacent A-type grate slices that are subject to weaker extrusion pressure, thereby crushing the ash shell on the surface of the fire carbon and accelerating the burning speed of the coal core.

[0150] In some embodiments, the height of the lower thrust section 10 can be 20-50 mm according to different design requirements.

[0151] The A-type grate plate and the B-type grate plate are provided with an arc-shaped foot 11 at the bottom end of the lower thrust section 10. The function and benefit of such a setting are: the arc-shaped foot 11 can improve the obstacle-crossing ability of the grate plate during reciprocating motion, avoid the scraping of burrs on the surface of the stroke section that are not cleanly polished, damage the grate and cause mechanical failure.

[0152] In the embodiment of the utility model, the A-type grate slice and the B-type grate slice are composed of a head thrust section 8, a downward inclined section slope 9 (B-type grate slice) or a downward inclined section slope 9 and a downward inclined section longitudinal boss 9.2 (A-type grate slice), a downward inclined section blocking slide groove 6 and a lower thrust section 10, which together form a serrated thrust surface (also known as a thrust surface) of the downward inclined section of the grate head, which is used to push the coal seam and can cooperate with the reverse thrust surface of the front grate slice to form a clamp-shaped counter-extrusion on the carried coal seam during the reciprocating motion of the grate.

[0153] The travel section 2 located at the overlap of the front and rear rows of grate plates is a section of the grate surface that can accommodate the front and rear rows of grate plates for reciprocating motion. The function of the travel section 2 is:

[0154] (1) When the front and rear rows of grate plates make reciprocating forward and backward motions, a gradually opening gap area will be generated in the coal seam to accommodate the falling coal sliding down along the downward-inclined grate surface of the rear row, and the unstable coal particles sliding down along the slope line of the dynamic accumulation angle from the coal seam carried by the upward-inclined grate surface of the front row, and the alternate mixing of the two sides in the gap area can accelerate the sinking of the fire grate surface;

[0155] (2) The travel section 2 is formed on the longitudinal vertical section of the grate, and the thrust surface is composed of the A-type grate piece, the head thrust section 8 of the B-type grate piece, the downward inclined section slope 9 (B-type grate piece) or the downward inclined section slope 9 and the downward inclined section longitudinal boss 9.2 (A-type grate piece), and the lower thrust section 10; the reverse thrust surface is composed of the upward inclined section slope 3 of the front grate piece (B-type grate piece), the upward inclined section slope 3 and the upward inclined section longitudinal boss 4, and the upward inclined surface 4.1 at the lower end of the upward inclined section longitudinal boss 4 (A-type grate piece); the thrust surface and the reverse thrust surface are formed. A transverse inverted trapezoidal groove with a large upper opening and a small lower opening is formed on the surface at the stroke section 2; as the grate piece reciprocates, the shape of the groove of the transverse inverted trapezoidal groove shrinks from an inverted trapezoid to a shallow V shape, or expands from a shallow V shape to an inverted trapezoid; when the groove shrinks, the coal layer carried by the stroke section 2 will be subjected to the impact and compression, and the coal particles and the fire carbon particles will move from bottom to top. The above-mentioned impact and compression and inter-particle dislocation movement are helpful to crush large pieces of coke slag, improve the slag breaking capacity of the grate, and expand the applicable range of the grate for various fuels.

[0156] In some embodiments, the front end head height of the grate slice is increased; according to the design requirements, in the embodiment of the utility model, the front end head height of the A-type grate slice and the B-type grate slice is 100-250mm.

[0157] The front head height of the grate slice is divided into two sections: the upper and lower heights; the upper height refers to the vertical height between the extension line of the stroke section 2 and the top of the head lower cut angle 7 of the A-type grate slice or the top of the arc-shaped head lower cut angle 4.2 of the B-type grate slice; the lower height refers to the vertical height between the extension line of the stroke section 2 and the bottom of the arc-shaped foot 11 of the A-type grate slice or the B-type grate slice. The sum of the upper and lower height values ​​is the design height of the front head of the A-type grate slice and the B-type grate slice.

[0158] The embodiment of the utility model improves the front end head height of the grate plate, and its functions and benefits are:

[0159] (1) By increasing the front end head height of the grate plate, the heat dissipation ratio of the grate plate can be increased and the anti-burning performance of the grate plate can be improved;

[0160] (2) When the design height of the front head of the grate is greater than the actual running thickness of the coal seam it carries, the coal seam can obtain: a horizontal oblique section of the entire coal seam with the grate travel distance as the longitudinal segment spacing and the time as 1 / 2 of the reciprocating stroke cycle, static exposure and ignition in the high-temperature flame of the furnace, and: in the subsequent 1 / 2 reciprocating stroke cycle, it mixes with the unignited coal particles in the process of sliding down along the horizontal oblique section and undergoes dynamic convection heat exchange from the high-temperature flame of the furnace to form a coal-underfire, thereby further accelerating the downward ignition speed of the flame in the coal seam;

[0161] (3) By increasing the height of the front end head of the grate, the thrust surface and the reverse thrust surface of the grate can further improve the ability of crushing large pieces of coke slag during counter-extrusion, thereby expanding the applicable range for different fuels.

[0162] When the A-type grate slices and the B-type grate slices are arranged to form a reciprocating grate, the preferred arrangement is: the A-type grate slices and the B-type grate slices are arranged in a staggered manner in the same row horizontally, and the front and rear rows are arranged one by one or staggered in the longitudinal direction; the A-type grate slices and the B-type grate slices are arranged in a staggered manner in the same row horizontally, and the front and rear rows are arranged semi-staggered in the longitudinal direction. Figure 8 As shown, the A-type grate pieces and the B-type grate pieces are arranged in a staggered manner in the same row horizontally and arranged one by one in the longitudinal direction. Fig.10 shown.

[0163] in, Figure 8 The longitudinal semi-offset arrangement shown, that is, the width of the A-type grate slice and the B-type grate slice is the same, and the transverse offset distance between the A-type grate slice / B-type grate slice in the front grate slice and the B-type grate slice / A-type grate slice in the rear grate slice is 1 / 2 of the width of the A-type grate slice / B-type grate slice. Such a longitudinal semi-offset arrangement of the front and rear rows can further reduce the disturbance and ventilation blind corners in the coal seam, and accelerate the burning speed of the residual carbon in the coal seam. In some other embodiments, a 1 / 3 offset or other transverse spacing offset arrangement can also be adopted as needed.

[0164] In the embodiment of the present utility model, Figure 8 The side pieces on the left and right sides of the reciprocating grate shown are adjustment pieces with two widths based on the A-type grate piece. One side piece has the same width as the A-type grate piece, and the other side piece has a width 1.5 times that of the A-type grate piece, serving as a transverse semi-offset arrangement adjustment piece. Fig.10 The side pieces on the left and right sides of the reciprocating grate shown are adjustment pieces with the A-type grate piece and the B-type grate piece as the mother pieces and the width being equal to the mother piece width.

[0165] The new reciprocating grate provided by the embodiment of the utility model has a large specific surface area and can be used for energy-saving and efficiency-enhancing transformation of old boilers without increasing the installation area of ​​the original grate, thereby further improving the thermal efficiency of boiler operation.

[0166] In some embodiments, see Figure 1 As shown in FIG. 6 , the rear end of the face beam 1 of the A-type grate slice and the B-type grate slice are both provided with a first side block 16, and the front end is provided with a second side block 16.1 on one side of the arc-shaped foot 11 and the lower thrust section 10. The first side block 16 and the second side block 16.1 are used to ensure the minimum ventilation gap between two adjacent grate slices. At the same time, the second side block 16.1 is located in the working section with the lowest heating intensity and the best cooling condition at the head of the grate slice, and can simultaneously receive horizontal air supply and air from the bottom. The double air supply cooling section with vertical air supply has the following functions: (1) the longitudinal ventilation duct between the two side blocks at the front and rear of the grate slice also serves as the transverse reserved expansion joint of the grate slice, which is used to freely absorb the transverse expansion of the adjacent grate slices on the left and right sides in the high-temperature heating section; (2) it is conducive to the foreign matter half stuck in the longitudinal ventilation duct of the grate slice to move along with the coal layer, and to discharge the foreign matter forward unimpeded along the longitudinal ventilation duct, so as to avoid the hard foreign matter from scratching or breaking the grate slice in the process of transferring the transverse accumulated expansion of the grate slice. That is, the first side block 16 and the second side block 16.1 help to achieve the precise control of the transverse spacing of the ventilation duct between adjacent grate slices and the transverse reserved expansion joint of the grate slice.

[0167] The A-type grate plate and the B-type grate plate are both provided with side strip tenons 13 and side strip tenon grooves 13.1 (see Figure 4 ), the strip tenon 13 is located on one side of the reinforcing rib 12 and protrudes outward, and its shape is an inverted trapezoid with the inclined surface facing upward; the side strip tenon groove 13.1 is located on the other side of the reinforcing rib 5 and is concave inward, and its shape matches the side strip tenon 13, and the side strip tenon 13 and the side strip tenon groove 13.1 are used to clamp two adjacent grate plates. Further, in some embodiments, the side strip tenon 13, the face beam 1, the side strip tenon groove 13.1 and the reinforcing rib 12 can be integrally cast.

[0168] At the same time, the front and rear ends of the A-type grate slices and B-type grate slices in the same row are respectively connected by tension rods and limit pins. The front ends of the reinforcement ribs 12 of the A-type grate slices and B-type grate slices are provided with head limit holes 12.1 for the front end tension rods to pass through and be locked by the limit pins; the rear ends of the reinforcement ribs 12 of the A-type grate slices and B-type grate slices are provided with tail limit holes 12.2 for the rear end tension rods to pass through and be locked by the limit pins.

[0169] The rear ends of the reinforcing ribs 12 of the A-type grate slices and the B-type grate slices are also provided with U-shaped slots 15, and the U-shaped slots 15 are used to connect with the movable beam or fixed beam of the grate beam. This is the prior art and will not be described here.

[0170] In addition, the reciprocating grate in the embodiment of the utility model can also cooperate with a new type of large coverage furnace arch and furnace combustion system disclosed in the existing Chinese patent CN218544504U to further improve the surface ignition speed of the coal seam after the new coal in the front arch area enters the furnace, improve the downward ignition speed of the flame in the coal seam, and reduce the carbon content of fly ash; it can also cooperate with a boiler system and layered coal hopper disclosed in the existing Chinese patent CN214275803U to match the effective combustion time provided by each layer in the coal seam with the burnable particle size to further reduce the carbon content of the slag. These three technologies can be applied together to form a technical chain, which can be used together to make up for the shortcoming of the existing side-feeding mechanical grate layer combustion furnace bottom coal layer in the furnace that has insufficient effective combustion time, and further improve the thermal efficiency of boiler operation.

[0171] Example 2

[0172] The utility model provides a grate plate, which comprises a surface beam and a reinforcing rib arranged at the bottom of the surface beam, and the surface beam is sequentially provided with a travel section, an upward inclined section slope and a downward inclined section slope; wherein:

[0173] The upward inclined section slope surface is provided with a plurality of upward inclined section blocking slide grooves, or the upward inclined section slope surface is provided with an upward inclined section longitudinal boss, or the upward inclined section slope surface is provided with an upward inclined section longitudinal boss and the upward inclined section longitudinal boss is provided with a plurality of upward inclined section blocking slide grooves;

[0174] and / or;

[0175] The downward-inclined section slope surface is provided with a plurality of downward-inclined section anti-slip grooves, or the downward-inclined section slope surface is provided with a downward-inclined section longitudinal boss, or the downward-inclined section slope surface is provided with a downward-inclined section longitudinal boss and the downward-inclined section longitudinal boss is provided with a plurality of downward-inclined section anti-slip grooves.

[0176] The grate plate provided in the embodiment of the utility model is used as a grate plate component of the existing reciprocating grate. The most basic difference between it and the existing grate plate is that: according to the actual working conditions, an upward inclined section resistance slide groove and / or an upward inclined section longitudinal boss is arranged on the upward inclined section slope and / or the downward inclined section slope. Through the arrangement of the resistance slide groove and / or the boss, the combustion working condition of the existing grate plate is improved and the thermal efficiency of the operation is improved. According to this concept, a variety of combinations are formed, such as: a plurality of upward inclined section resistance slide grooves are arranged on the upward inclined section slope; or: a plurality of downward inclined section resistance slide grooves are arranged on the downward inclined section slope; or: a plurality of upward inclined section resistance slide grooves are arranged on the upward inclined section slope, and a plurality of downward inclined section resistance slide grooves are arranged on the downward inclined section slope ; or: a number of upward-inclined section anti-slide grooves are arranged on the upward-inclined section slope, a downward-inclined section longitudinal boss is arranged on the downward-inclined section slope, and a number of downward-inclined section anti-slide grooves are arranged on the downward-inclined section longitudinal boss; or: a number of upward-inclined section anti-slide grooves are arranged on the upward-inclined section slope, and a number of downward-inclined section anti-slide grooves are arranged on the downward-inclined section slope; or: a number of upward-inclined section anti-slide grooves are arranged on the upward-inclined section slope, and a downward-inclined section longitudinal boss is arranged on the downward-inclined section slope; or: a number of upward-inclined section anti-slide grooves are arranged on the upward-inclined section slope, a downward-inclined section longitudinal boss is arranged on the downward-inclined section slope, and a number of downward-inclined section anti-slide grooves are arranged on the downward-inclined section longitudinal boss, and other possible implementation methods are all included in the protection scope of the present utility model.

[0177] On the basis of the above technical scheme, as a further improvement, all the improved technical features in Example 1 can also be applied to the grate plates in Example 2 of the utility model to achieve the same or similar technical effects as Example 1, and will not be listed or elaborated here one by one.

[0178] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the scope of application of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grate sheet for a reciprocating grate, characterized in that: The grate plate comprises a surface beam and a reinforcing rib arranged at the bottom of the surface beam, and the surface beam is sequentially provided with a travel section, an upward inclined section slope and a downward inclined section slope; wherein: The upward inclined section slope surface is provided with a plurality of upward inclined section blocking slide grooves, or the upward inclined section slope surface is provided with an upward inclined section longitudinal boss, or the upward inclined section slope surface is provided with an upward inclined section longitudinal boss and the upward inclined section longitudinal boss is provided with a plurality of upward inclined section blocking slide grooves; and / or; The downward-inclined section slope surface is provided with a plurality of downward-inclined section anti-slip grooves, or the downward-inclined section slope surface is provided with a downward-inclined section longitudinal boss, or the downward-inclined section slope surface is provided with a downward-inclined section longitudinal boss and the downward-inclined section longitudinal boss is provided with a plurality of downward-inclined section anti-slip grooves.

2. The grate sheet for reciprocating grate according to claim 1, characterized in that: The angle between the slope of the upward inclined section and the extension line of the travel section is 13°-33°; The horizontal angle between the slope surface of the downward-inclined section and the extended line of the travel section is 40°-60°, and the slope surface is inclined forward and downward.

3. The grate sheet for reciprocating grate according to claim 2, characterized in that: The length of the slope of the upward inclined section is 0.5-1.5 times the length of the travel section.

4. The grate sheet for reciprocating grate according to claim 1, characterized in that: A head thrust section is also provided between the upward inclined section slope surface and the downward inclined section slope surface; With the surface of the travel section and its surface extension line as the baseline, the upward inclined section slope is a grate surface formed by linearly inclining from the front end of the travel section toward the front and upward; the head thrust section is inclined from the front end of the upward inclined section slope toward the rear and downward; the downward inclined section slope is linearly inclined from the lower end of the head thrust section toward the front and downward.

5. The grate sheet for reciprocating grate according to claim 1, characterized in that: The lower end of the slope of the downward slope section is also provided with a lower thrust section and an arc-shaped foot; The lower thrust section is vertically arranged downward, outwardly arranged downward, or inwardly arranged downward from the lower end of the slope of the downwardly inclined section, and an arc-shaped foot is arranged at the lower end of the lower thrust section.

6. The grate sheet for reciprocating grate according to any one of claims 1 to 5, characterized in that: If: a number of upward-inclined section anti-sliding grooves are arranged on the upward-inclined section slope surface, then: A head thrust section is also provided between the upward inclined section slope and the downward inclined section slope, and the head thrust section is inclined backward and downward from the front end of the upward inclined section slope; at the same time, the upward inclined section slope and the head thrust section are connected through the head lower cutting angle; If: the inclined section slope surface is provided with an inclined section longitudinal boss and the inclined section longitudinal boss is provided with a plurality of inclined section blocking slide grooves, then: The lower end of the upward inclined section longitudinal boss is provided with an upward inclined slope surface, and the upper end is provided with an arc-shaped lower cut corner of the head of the upward inclined section longitudinal boss. A plurality of upward inclined section anti-slip grooves are provided on the slope surface between the upward inclined section longitudinal boss and the arc-shaped lower cut corner of the head of the upward inclined section longitudinal boss at the upper end; If: a number of downward-inclined anti-slip grooves are provided on the downward-inclined slope surface, then: A downward slope surface is arranged at the upper end of the downward slope surface, and a plurality of downward slide-blocking grooves are arranged on the downward slope surface; If: a downward-sloping longitudinal boss is provided on the downward-sloping slope surface and a plurality of downward-sloping sliding-blocking grooves are provided on the downward-sloping longitudinal boss, then: The upper end of the longitudinal boss of the downward-inclined section is a downward-sloping slope surface, and the lower end is connected to the lower thrust section, and a plurality of downward-inclined section anti-slip grooves are arranged in the middle.

7. The grate sheet for reciprocating grate according to claim 6, characterized in that: If: a number of upward-inclined section anti-sliding grooves are arranged on the upward-inclined section slope surface, then: A head thrust section is also provided between the upward inclined section slope and the downward inclined section slope, and the head thrust section is inclined backward and downward from the front end of the upward inclined section slope; at the same time, the upward inclined section slope and the head thrust section are connected through a head lower cutting angle, and the head lower cutting angle is an acute angle, and the inner angle between the head thrust section and the upward inclined section slope is an acute angle less than 90°, and the height of the head thrust section is 10-40 mm; If: a number of downward-inclined anti-slip grooves are provided on the downward-inclined slope surface, then: A downward slope surface is arranged at the upper end of the downward slope surface, a plurality of downward slide-blocking grooves are arranged on the downward slope surface, and the downward slope angle of the downward slope surface is less than 45°; If: a downward-sloping longitudinal boss is provided on the downward-sloping slope surface and a plurality of downward-sloping sliding-blocking grooves are provided on the downward-sloping longitudinal boss, then: The upper end of the downward-inclined longitudinal boss is a downward-inclined slope surface, and the lower end is connected to the lower thrust section, with a plurality of downward-inclined slide-blocking grooves arranged in the middle; the downward-inclined angle of the downward-inclined slope surface is less than 45°.

8. The grate sheet for reciprocating grate according to any one of claims 1 to 5, characterized in that: The inner shape of the upward inclined section resistance slide groove is an arc hook shape, a V shape or a folded hook shape; the bottom depth of the upward inclined section resistance slide groove is 2-15mm, and the longitudinal length of the groove is 15-50mm; The downward-inclined section-blocking slide groove comprises an arc-shaped groove head at the upper end and a groove bottom inclined downward, and the groove bottom slope angle of the downward-inclined section-blocking slide groove is smaller than the downward-inclined section slope angle of the downward-inclined section slope.

9. The grate sheet for reciprocating grate according to any one of claims 1 to 5, characterized in that: The front end head height of the grate piece includes the upper section height and the lower end height, wherein the upper section height refers to: the vertical height between the extension line of the travel section and the top of the grate piece; the lower section height refers to: the vertical height between the extension line of the travel section and the bottom of the grate piece; the sum of the upper and lower section height values ​​is the front end head height of the grate piece; The front end head height of the grate piece is 100-250mm.

10. A reciprocating grate, characterized in that: It comprises a plurality of rows of grate sheet groups, each row of grate sheet groups comprises A-type grate sheets and B-type grate sheets, each row of grate sheet groups comprises A-type grate sheets and B-type grate sheets arranged adjacent to each other in a staggered manner in a transverse direction, and at the same time, the A-type grate sheets and the B-type grate sheets in the front and rear rows of grate sheet groups are arranged opposite to each other or staggered in a longitudinal direction; The A-type grate plate and the B-type grate plate both include a surface beam and a reinforcing rib arranged at the bottom of the surface beam, and the surface beams of the A-type grate plate and the B-type grate plate are sequentially provided with a travel section, an upward inclined section slope and a downward inclined section slope; A plurality of upward-inclined section blocking slide grooves are arranged on the upward-inclined section slope of the A-type grate plate; An upward inclined section longitudinal boss is arranged on the upward inclined section slope surface of the B-type grate plate, and a plurality of upward inclined section blocking slide grooves are arranged on the upward inclined section longitudinal boss.

11. The reciprocating grate according to claim 10, characterized in that: In the A-type grate sheet and the B-type grate sheet, a head thrust section is further provided between the upward slope section and the downward slope section; a lower thrust section and an arc-shaped foot are further provided at the lower end of the downward slope section; With the surface of the travel section and its surface extension line as the baseline, the upward inclined section slope is a grate surface formed by linearly inclining from the front end of the travel section toward the front and upward; the head thrust section is inclined toward the rear and downward from the front end of the upward inclined section slope; the downward inclined section slope is linearly inclined toward the front and downward from the lower end of the head thrust section; the lower thrust section is vertically arranged downward, outwardly arranged downward, or inwardly arranged downward from the lower end of the downward inclined section slope, and the lower end of the lower thrust section is provided with an arc-shaped foot.

12. The reciprocating grate according to claim 11, characterized in that: The inner angle between the head thrust section and the upward inclined section slope of the A-type grate slice and the B-type grate slice is an acute angle less than 90°, and the height of the head thrust section is 10-40 mm.

13. The reciprocating grate according to claim 11, characterized in that: The upward slope of the A-type grate plate is connected to the head thrust section through the head lower cut angle, and the head lower cut angle is an acute angle; The lower end of the inclined section longitudinal boss of the B-type grate plate is provided with an upward inclined surface, and the upper end is provided with an arc-shaped lower cutting angle of the head of the inclined section longitudinal boss. A plurality of inclined section anti-slip grooves are provided on the inclined surface between the upward inclined surface of the inclined section longitudinal boss and the arc-shaped lower cutting angle of the head of the inclined section longitudinal boss at the upper end.

14. The reciprocating grate according to claim 13, characterized in that: When the fuel used by the grate is straw biomass fuel and is used for garbage incineration, the shape of the arc-shaped lower cut corner of the head of the B-type grate piece is changed to an acute angle shape structure.

15. The reciprocating grate according to any one of claims 10 to 14, characterized in that: In the B-type grate sheet: The bottom slope length of the upward-inclined longitudinal boss is less than or equal to the length of the upward-inclined slope, the bottom slope width of the upward-inclined longitudinal boss is equal to the width of the grate, and the upper slope line of the upward-inclined longitudinal boss is parallel to the slope line of the upward-inclined slope; and / or, The height of the longitudinal boss of the upward inclined section is 10-35 mm; the angle between the upward slope surface at the lower end of the longitudinal boss of the upward inclined section and the extension line of the stroke section is 40°-50°.

16. The reciprocating grate according to any one of claims 10 to 14, characterized in that: The inner shape of the upward inclined section slide groove is a circular curved hook shape, a V shape or a folded hook shape; The bottom depth of the upward-inclined slide groove is 2-15 mm, and the longitudinal length of the groove is 15-50 mm; The number of the upward inclined section resistance slide grooves on the upward inclined section slope of the A-type grate piece and the upward inclined section longitudinal boss of the B-type grate piece is 1-10, and two adjacent upward inclined section resistance slide grooves are directly connected or spaced apart.

17. The reciprocating grate according to claim 10, characterized in that: The downward slope of the A-type grate slice and the B-type grate slice is a grate surface that is inclined forward and downward and has a horizontal angle of 40°-60° with the extended line of the stroke section.

18. The reciprocating grate according to claim 17, characterized in that: A downward-inclined longitudinal boss is arranged on the downward-inclined slope of the A-type grate plate; the upper end of the downward-inclined longitudinal boss is a downward-inclined slope, the lower end is connected to the lower thrust section, and a plurality of downward-inclined sliding grooves are arranged in the middle; The upper end of the downward slope of the B-type grate plate is provided with a downward slope, and a plurality of downward slide-blocking grooves are provided on the downward slope of the B-type grate plate.

19. The reciprocating grate according to claim 18, characterized in that: The downward inclination angles of the downward slope surfaces of the A-type grate slices and the B-type grate slices are both less than 45°.

20. The reciprocating grate according to claim 18, characterized in that: The downward-inclined section-blocking slide groove of the A-type grate plate and the B-type grate plate comprises an arc-shaped groove head at the upper end and a groove bottom inclined downward, and the groove bottom slope angle of the downward-inclined section-blocking slide groove is smaller than the downward-inclined section slope angle of the downward-inclined section slope.

21. The reciprocating grate according to any one of claims 10-14, 17-20, characterized in that: The front end head height of the A-type grate sheet and the B-type grate sheet includes an upper section height and a lower end height, wherein the upper section height refers to: the vertical height between the extension line of the travel section and the top of the A-type grate sheet or the B-type grate sheet; the lower section height refers to: the vertical height between the extension line of the travel section and the bottom of the A-type grate sheet or the B-type grate sheet; the sum of the upper and lower section height values ​​is the front end head height of the A-type grate sheet and the B-type grate sheet; The front end head height of the A-type grate slice and the B-type grate slice is 100-250 mm.

22. The reciprocating grate according to any one of claims 10-14, 17-20, characterized in that: The A-type grate plates and the B-type grate plates are arranged in a staggered manner in the same row horizontally, and in a one-to-one or staggered arrangement in the front and rear rows vertically; The grate is provided with side pieces along one or both sides in the lateral direction. The side pieces are adjustment pieces designed based on the A-type grate piece and / or the B-type grate piece, having the same structure as the parent piece and adjustable lateral width.

23. The reciprocating grate according to claim 22, characterized in that: The A-type grate plates and the B-type grate plates are arranged in a staggered manner in the same row transversely and semi-staggered in the longitudinal direction; The longitudinal semi-offset arrangement means that the width of type A grate slices and type B grate slices are the same, and the lateral offset distance between type A grate slices / type B grate slices in the front grate slices and type B grate slices / type A grate slices in the rear grate slices is: 1 / 2 width of type A grate slices / type B grate slices.

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