Anti-blocking raw coal bunker

Abstract

The utility model relates to the technical field of raw coal storage equipment, in particular to an anti-blocking raw coal bunker which comprises a raw coal bunker body and a high-temperature steam blowing device. The raw coal bunker body comprises a coal inlet, a coal falling opening and a bunker wall. The bunker wall is of a conical hollow rotary body structure, the coal inlet is located in the top of the raw coal bunker, and the coal falling port is located in the bottom of the raw coal bunker. The coal inlet and the coal falling opening are vertically through; the high-temperature steam blowing device comprises a high-temperature steam source, a steam mother pipe, a steam conveying pipe and a steam nozzle, one end of the high-temperature steam mother pipe is communicated with the high-temperature steam source, and the other end is communicated with the steam conveying pipe; the steam nozzle is communicated with the steam conveying pipe and penetrates through the bin wall; according to the anti-blocking raw coal bunker, high-temperature steam is conveyed to the steam conveying pipe through the steam main pipe and sprayed out from the steam nozzles arranged on the steam conveying pipe to blow the coal, so that the frozen coal is thawed, and the situation that the coal in the inner cavity of the bunker wall is frozen and adheres to the inner side of the bunker wall, and consequently the bunker body of the raw coal bunker is blocked is conveniently avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of raw coal storage equipment, in particular to a raw coal bunker capable of preventing blockage. BACKGROUND

[0002] The raw coal bunker is an important facility for storing particulate materials such as raw coal and coal slurry in a thermal power plant in the field of power engineering. In the operation process of a thermal power generator set, the coal stored in the raw coal bunker is transported to a coal mill by a coal feeder, and the coal mill grinds the coal into coal powder for use by the generator set.

[0003] Due to the complex composition and morphology of coal, blockage is prone to occur in the raw coal bunker, especially in low-temperature weather, the coal with high moisture content will freeze in the raw coal bunker and adhere to the inner wall of the raw coal bunker, thereby increasing the possibility of blockage of the raw coal bunker and affecting the normal operation of the thermal power generator set. In the prior art, an air hammer is often used to vibrate the outer wall of the raw coal bunker to prevent blockage. In actual use, the coal adhering to the inner wall of the raw coal bunker is effectively shaken off under the vibration of the air hammer, but the effect of unblocking the coal frozen and adhered to the inner side of the wall to cause blockage is not good. CONTENT OF THE UTILITY MODEL

[0004] In order to avoid the blockage phenomenon caused by low-temperature caking of coal in the raw coal bunker, the present application provides a raw coal bunker capable of preventing blockage.

[0005] The raw coal bunker capable of preventing blockage provided by the present application adopts the following technical solution:

[0006] A raw coal bunker capable of preventing blockage comprises a raw coal bunker body and a high-temperature steam blowing device.

[0007] The raw coal bunker body comprises a coal inlet, a coal outlet and a wall. The wall is arranged in a conical hollow rotary body structure. The coal inlet is located at the top of the raw coal bunker, and the coal outlet is located at the bottom of the raw coal bunker. The coal inlet and the coal outlet are arranged in a vertical manner. The diameter of the wall gradually decreases from the end close to the coal inlet to the end away from the coal inlet.

[0008] The high-temperature steam blowing device comprises a high-temperature steam source, a steam main pipe, a plurality of steam delivery pipes and a plurality of steam nozzles arranged on the steam delivery pipes. One end of the high-temperature steam main pipe is connected to the high-temperature steam source, and the other end is connected to a plurality of steam delivery pipes. The steam delivery pipes are coaxially arranged along the height direction and located outside the wall. The steam nozzles are connected to the steam delivery pipes, and a plurality of steam nozzles pass through the wall and are arranged towards the center of the horizontal cross section of the inner cavity of the wall.

[0009] The coal enters the inner cavity of the wall through the coal inlet, and is transported to the coal mill through the coal feeder at the coal drop opening, and the coal mill is used to make the coal into coal powder for the generator set; in low temperature weather, the high temperature steam source provides high temperature steam, the high temperature steam is transported to the plurality of steam delivery pipes through the steam main pipe, and is sprayed out from the steam nozzles arranged on the steam delivery pipes at different heights, the high temperature steam blows the coal to thaw the frozen coal, thereby avoiding the frozen coal in the inner cavity of the wall from freezing and adhering to the inner side of the wall, so as to avoid the blockage of the coal bunker body; the diameter of the wall gradually decreases from the end close to the coal inlet to the end away from the coal inlet, so that the coal forms a natural conical shape in the inner cavity of the wall, thereby maintaining the stability and natural collapse of the coal; at the same time, the flow area of the wall gradually decreases along the flow direction of the coal, so that the extrusion force on the coal gradually increases during the flow process, thereby facilitating the smooth discharge of the coal and further avoiding the blockage of the coal bunker body.

[0010] In one specific implementation, the diameter of the wall along the coal inlet to the coal drop opening changes monotonically in a decreasing hyperbolic curve, and the thickness of the wall is uniform.

[0011] By adopting the above technical scheme, the diameter of the wall along the coal inlet to the coal drop opening changes monotonically in a decreasing hyperbolic curve, as the coal flows from the coal inlet to the coal drop opening, the inclination angle of the wall gradually increases, which promotes the gradual increase of the gravity component of the coal along the wall and the gradual decrease of the extrusion component of the gravity, thereby facilitating the avoidance of the adhesion of the coal to the inner side of the wall, and improving the smoothness of the flow of the coal in the inner cavity of the wall.

[0012] In one specific implementation, a first electromagnetic valve is fixedly arranged on the steam delivery pipe, and the first electromagnetic valve is used to realize the opening and closing and flow regulation of the steam delivery pipe.

[0013] By adopting the above technical scheme, the first electromagnetic valve is arranged, and the flow regulation of the high temperature steam source through the steam delivery pipe is realized by controlling the opening and closing degree of the first electromagnetic valve, thereby facilitating the regulation of the steam spraying amount of the steam nozzle and improving the blowing efficiency of the high temperature steam on the coal in the inner cavity of the wall.

[0014] In one specific implementation, a plurality of steam nozzles are uniformly distributed along the circumference of the inner cavity of the wall.

[0015] By adopting the above technical scheme, the plurality of steam nozzles are uniformly distributed along the circumference of the inner cavity of the wall, the inner cavity of the wall is blown by high temperature steam from multiple angles, the blowing range uniformly covers the coal in the inner cavity of the wall, and the thawing effect on the coal is improved.

[0016] In one specific embodiment, a compressed air blowing device is also included, which comprises a high-pressure air source, a compressed air main pipe, a plurality of compressed air delivery pipes, and a plurality of wall-attached air nozzles arranged on the compressed air delivery pipes; one end of the compressed air main pipe is connected to the high-pressure air source, and the other end is connected to a plurality of compressed air delivery pipes respectively; the compressed air delivery pipes are coaxially arranged along the height direction outside the bin wall; and the compressed air delivery pipes are arranged at intervals between adjacent two steam delivery pipes; a second electromagnetic valve is fixedly arranged on the compressed air delivery pipe, which is used to open and close the compressed air delivery pipe.

[0017] The wall-attached air nozzles are connected to the compressed air delivery pipes, and each wall-attached air nozzle is arranged towards the center of the horizontal cross section of the bin wall cavity.

[0018] By adopting the above technical scheme, the compressed air blowing device is arranged, the high-pressure air source provides compressed air, the compressed air is delivered to a plurality of compressed air delivery pipes through the compressed air main pipe, and is sprayed out from the wall-attached air nozzles; the compressed air blows the coal at high pressure, which not only can cut and crush the caked coal at high pressure to reduce the block size of the coal and form a fluffy layer, so as to avoid the clogging of the coal in the bin wall cavity due to caking, but also can reduce the friction coefficient between the coal and the bin wall, so as to improve the flowability of the coal, avoid the adhesion of the coal to the inner side of the bin wall, and enhance the dredging effect of the bin wall cavity; the wall-attached air nozzles arranged on a plurality of compressed air main pipes spray high-pressure air flow from different heights of the bin wall cavity, which facilitates to improve the spraying range of the high-pressure air flow and enhance the blowing effect of the compressed air.

[0019] In one specific embodiment, the plurality of wall-attached air nozzles are uniformly distributed along the circumference of the bin wall.

[0020] By adopting the above technical scheme, the plurality of wall-attached air nozzles are uniformly distributed along the circumference of the bin wall cavity, which facilitates to uniformly cover the coal in the bin wall cavity from multiple angles, and improve the blowing effect on the coal.

[0021] In one specific embodiment, the number of wall-attached air nozzles arranged on the compressed air delivery pipe gradually increases from the direction close to the coal drop port to the direction away from the coal drop port.

[0022] By adopting the above technical scheme, the number of wall-attached air nozzles arranged on the compressed air delivery pipe gradually increases from the direction close to the coal drop port to the direction away from the coal drop port, which facilitates to ensure that the coal in the upper part of the bin wall cavity is uniformly covered according to the conical structure of the bin wall.

[0023] In one specific implementation, the shaking device includes air hammers, and the air hammers are fixedly arranged outside the bin wall.

[0024] By using the above technical solution, the air hammers are arranged outside the bin wall, which facilitates the timely falling of the coal in the inner cavity of the bin wall and avoids the arching of the coal, thereby facilitating the smooth flow of the coal.

[0025] In one specific implementation, the compressed air main pipe is fixedly provided with a pressure adjusting member.

[0026] By using the above technical solution, the pressure adjusting member arranged on the compressed air main pipe facilitates the adjustment of the pressure of the compressed air according to the blockage condition of the coal, while ensuring the continuous and stable pressure of the compressed air, thereby improving the blowing effect on the coal.

[0027] In one specific implementation, the inner side of the bin wall is coated with a polymer coating.

[0028] By using the above technical solution, the inner side of the bin wall is coated with a polymer coating, which reduces the friction coefficient between the coal and the bin wall, facilitates the smooth flow of the coal in the inner cavity of the bin wall, and thereby reduces the possibility of blockage of the raw coal bin.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. The high-temperature steam blowing device is arranged, in low-temperature weather, a high-temperature steam source provides high-temperature steam, the high-temperature steam is respectively delivered to a plurality of steam delivery pipes through a steam main pipe, and is sprayed out from steam nozzles arranged on the steam delivery pipes at different heights, the high-temperature steam blows the coal, thaws the frozen coal, and avoids the coal in the inner cavity of the bin wall from freezing and adhering to the inner side of the bin wall, thereby causing the blockage of the raw coal bin.

[0031] 2. The bin wall is arranged as a conical hollow rotary body structure, the coal forms a natural conical shape in the inner cavity of the bin wall, thereby maintaining the stability and natural collapse of the coal; at the same time, the bin wall gradually decreases in the flow passage cross-sectional area along the flow direction of the coal, so that the extrusion force on the coal gradually increases during the flow process, facilitating the smooth discharge of the coal and further avoiding the blockage of the raw coal bin; the diameter of the bin wall changes along the monotone decreasing hyperbola from the coal inlet to the coal outlet, as the coal flows from the coal inlet to the coal outlet, the inclination angle of the bin wall gradually increases, which facilitates the gradual increase of the gravity component of the coal along the bin wall and the gradual decrease of the extrusion component of the gravity on the bin wall, thereby improving the smoothness of the flow of the coal in the inner cavity of the bin wall.

[0032] 3. The setting of compressed air blowing device, high pressure gas source provides compressed air, compressed air is delivered to a plurality of compressed air delivery pipes through compressed air main pipe respectively, and is sprayed from the wall-attached air nozzle, the compressed air performs high pressure blowing on the coal material, not only can perform high pressure airflow crushing cutting on the caked coal material, so as to reduce the block diameter of the coal material to form a fluffy layer, so as to facilitate avoiding the caking of the coal material in the inner cavity of the wall, meanwhile, the compressed air sprayed from the wall-attached air nozzle can also reduce the friction coefficient of the coal material and the wall, so as to improve the flowability of the coal material, avoid the adhesion of the coal material to the inner side of the wall, and enhance the dredging effect of the inner cavity of the wall. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not limit the present application in any way.

[0034] Figure 1 It is a whole structure schematic view of the anti-blocking raw coal bunker according to the embodiment of the present application.

[0035] Figure 2 It is a horizontal sectional view of the anti-blocking raw coal bunker according to the embodiment of the present application, which is intended to show the high temperature steam blowing device.

[0036] Figure 3 It is another horizontal sectional view of the anti-blocking raw coal bunker according to the embodiment of the present application, which is intended to show the compressed air blowing device.

[0037] BRIEF DESCRIPTION OF DRAWINGS: 1, raw coal bunker body; 11, coal inlet; 12, coal outlet; 13, wall; 2, high temperature steam blowing device; 21, high temperature steam source; 22, steam main pipe; 23, steam delivery pipe; 231, first electromagnetic valve; 24, steam nozzle; 3, compressed air blowing device; 31, high pressure gas source; 32, compressed air main pipe; 33, compressed air delivery pipe; 331, second electromagnetic valve; 34, wall-attached air nozzle; 35, pressure adjusting member; 4, rapping device; 41, air hammer. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0039] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply relative importance or a quantity of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features; in the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specified.

[0040] The application will be further described in conjunction with the accompanying drawings Figures 1-3 The application will be further described in conjunction with the accompanying drawings

[0041] The application discloses a kind of anti-blocking raw coal bunker.

[0042] Refer to Figure 1 And Figure 2 An anti-blocking raw coal bunker, comprising a raw coal bunker body 1, a high-temperature steam purging device 2, a compressed air purging device 3, and a rapping device 4; the raw coal bunker body 1 includes a coal inlet 11, a coal drop port 12, and a bunker wall 13. The bunker wall 13 is designed as a conical hollow rotating body structure. The coal inlet 11 is located at the top of the raw coal bunker body 1, and the coal drop port 12 is located at the bottom of the raw coal bunker body 1. The coal inlet 11 and the coal drop port 12 are vertically connected, and the center of the coal inlet 11 coincides with the center of the coal drop port 12. The inner side of the bunker wall 13 is coated with a high-molecular coating to reduce the friction coefficient between the coal and the bunker wall 13, thereby ensuring smooth flow of the coal in the inner cavity of the bunker wall 13. The diameter of the bunker wall 13 gradually decreases from the end close to the coal inlet 11 to the end away from the coal inlet 11, and the diameter of the bunker wall 13 along the coal inlet 11 to the coal drop port 12 changes in a monotonically decreasing hyperbolic curve. The thickness of the bunker wall 13 is uniform. After the coal enters the inner cavity of the bunker wall 13 from the coal inlet 11, it falls vertically and is discharged from the coal drop port 12. The high-temperature steam purging device 2 and the compressed air purging device 3 are fixedly installed on the bunker wall 13, and both are in communication with the inner cavity of the bunker wall 13. The rapping device 4 includes air hammers 41, and multiple air hammers 41 are fixedly installed on the outer side of the bunker wall 13.

[0043] Refer to Figure 1 And Figure 2, the high-temperature steam blowing device 2 comprises a high-temperature steam source 21, a steam main pipe 22, steam delivery pipes 23 and steam nozzles 24, one end of the high-temperature steam main pipe 22 is communicated with the high-temperature steam source 21, the other end is respectively communicated with a plurality of steam delivery pipes 23, the high-temperature steam source 21 can be a waste heat boiler, can be a steam generator, can also be a heat exchanger, as long as it can supply high-temperature steam. A plurality of steam delivery pipes 23 are coaxially arranged on the outer side of the bin wall 13 along the height direction, a first electromagnetic valve 231 is arranged on each steam delivery pipe 23, and the first electromagnetic valve 231 can adjust the opening and closing state of the steam delivery pipe 23; a plurality of steam nozzles 24 are installed on the steam delivery pipe 23, the plurality of steam nozzles 24 are uniformly distributed along the circumference of the inner cavity of the bin wall 13, and the steam nozzles 24 are communicated with the steam delivery pipe 23, the plurality of steam nozzles 24 penetrate through the bin wall 13, and the steam nozzles 24 are arranged towards the center of the horizontal section of the inner cavity of the bin wall 13.

[0044] Referring to Figure 1 and Figure 3 , the compressed air blowing device 3 comprises a high-pressure air source 31, a compressed air main pipe 32, a compressed air delivery pipe 33 and a wall-attached air nozzle 34; one end of the compressed air main pipe 32 is communicated with the high-pressure air source 31, the other end is respectively communicated with a plurality of compressed air delivery pipes 33, the plurality of compressed air delivery pipes 33 are coaxially arranged on the outer side of the bin wall 13 along the height direction, a pressure adjusting member 35 is fixedly arranged on the compressed air main pipe 32, the pressure adjusting member 35 can be a pressure stabilizing tank, can be a pressure regulating valve, or can be an air pressure regulator, as long as it can ensure that the compressed air is supplied while the pressure is stable; the plurality of compressed air delivery pipes 33 are arranged at intervals between adjacent two steam delivery pipes 23; a second electromagnetic valve 331 is fixedly arranged on the compressed air delivery pipe 33, and the second electromagnetic valve 331 is used to realize the opening and closing of the compressed air delivery pipe 33; a plurality of wall-attached air nozzles 34 are installed on the compressed air delivery pipe 33, the plurality of wall-attached air nozzles 34 are uniformly distributed along the circumference of the inner cavity of the bin wall 13, and the wall-attached air nozzles 34 are communicated with the compressed air delivery pipe 33, the plurality of wall-attached air nozzles 34 penetrate through the bin wall 13, and the wall-attached air nozzles 34 are arranged towards the center of the inner cavity of the bin wall 13. In particular, in order to improve the blowing quality of the compressed air, the number of wall-attached air nozzles 34 arranged on the compressed air delivery pipe 33 gradually increases from the direction close to the coal drop port 12 to the direction away from the coal drop port 12, and at the same time, the wall-attached air nozzles 34 can be inclined downward by 15° along the tangent direction of the bin wall 13, so as to change the compressed air sprayed by the wall-attached air nozzles 34 into a jet shape to form a spiral air film-shaped wall-attached air from top to bottom, thereby reducing the friction coefficient between the coal and the bin wall 13, improving the fluidity of the coal layer, avoiding the adhesion of the coal to the inner side of the bin wall 13, and enhancing the dredging effect of the coal in the inner cavity of the bin wall 13.

[0045] The implementation principle of the coal bunker is as follows: coal enters the inner cavity of the bunker wall 13 from the coal inlet 11 and is transported to the coal mill through the coal feeder at the coal drop opening 12, the coal mill mills the coal into coal powder for use by the generator set; in low-temperature weather, the high-temperature steam source 21 provides high-temperature steam, the high-temperature steam is transported to a plurality of steam delivery pipes 23 through a steam main pipe 22, and is sprayed out from steam nozzles 24 arranged on the steam delivery pipes 23 at different heights, the high-temperature steam blows and thaws the frozen coal, when the coal is caked, the high-pressure air source 31 provides compressed air, the compressed air is transported to a plurality of compressed air delivery pipes 33 through a compressed air main pipe 32, and is sprayed out from the wall-attached air nozzle 34, the compressed air blows and thaws the coal at high pressure, the caked coal is cut and crushed by the high-pressure airflow to reduce the block size of the coal and form a fluffy layer, thereby avoiding the coal from being caked and blocked in the inner cavity of the bunker wall 13; when the coal is arched in the inner cavity of the bunker wall 13, the air hammer 41 strikes the outer side of the bunker wall 13, so that the coal in the inner cavity of the bunker wall 13 falls in time, thereby promoting the smooth flow of the coal.

[0046] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it. The present application is not limited to the exact structure as described above and shown in the drawings, and the specific implementation of the present application cannot be limited to the above description. For ordinary skilled in the art to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be considered as falling within the scope of the present application.

Claims

1. A coal storage bin designed to prevent blockage, characterized in that, The utility model relates to a kind of high-temperature steam blowing device and compressed air blowing device for raw coal bunker, including: Raw coal bunker body (1) and high-temperature steam blowing device (2); The raw coal bunker body (1) includes coal inlet (11), coal drop (12) and bunker wall (13);The bunker wall (13) is set as conical hollow rotary body structure, the coal inlet (11) is located at the top of the raw coal bunker, the coal drop (12) is located at the bottom of the raw coal bunker;The coal inlet (11) and the coal drop (12) are vertically arranged;The diameter of the bunker wall (13) gradually decreases from the end close to the coal inlet (11) to the end away from the coal inlet (11); The high-temperature steam blowing device (2) includes high-temperature steam source (21), steam main pipe (22), multiple steam delivery pipes (23) and multiple steam nozzles (24) arranged on the steam delivery pipe (23), the high-temperature steam main pipe (22) is communicated with the high-temperature steam source (21) at one end, and is communicated with multiple steam delivery pipes (23) at the other end, respectively, multiple steam delivery pipes (23) are coaxially arranged along the height direction outside the bunker wall (13);The steam nozzle (24) is communicated with the steam delivery pipe (23), and multiple steam nozzles (24) all pass through the bunker wall (13), and the steam nozzle (24) is all arranged towards the horizontal section center of the inner cavity of the bunker wall (13).

2. The anti-blocking raw coal bunker according to claim 1, characterized in that, The diameter of the bunker wall (13) gradually decreases from the end close to the coal inlet (11) to the end away from the coal inlet (11), and the diameter of the bunker wall (13) along the coal inlet (11) to the coal drop (12) changes monotonically decreasing hyperbola, the thickness of the bunker wall (13) is uniform.

3. The anti-blocking raw coal bunker according to claim 1, characterized in that, The first electromagnetic valve (231) is fixedly arranged on the steam delivery pipe (23), and the first electromagnetic valve (231) is used to realize the opening and closing and flow regulation of the steam delivery pipe (23).

4. The anti-blocking raw coal bunker according to claim 1, characterized in that, Multiple steam nozzles (24) are uniformly distributed along the circumference of the inner cavity of the bunker wall (13).

5. The anti-blocking raw coal bunker according to claim 1, characterized in that, It also includes compressed air blowing device (3), the compressed air blowing device (3) includes high-pressure gas source (31), compressed air main pipe (32), multiple compressed air delivery pipes (33) and multiple wall-mounted air nozzles (34) arranged on the compressed air delivery pipe (33);The compressed air main pipe (32) is communicated with the high-pressure gas source (31) at one end, and is communicated with multiple compressed air delivery pipes (33) at the other end, respectively, multiple compressed air delivery pipes (33) are coaxially arranged along the height direction outside the bunker wall (13);And multiple compressed air delivery pipes (33) are arranged at intervals along adjacent two steam delivery pipes (23);The second electromagnetic valve (331) is fixedly arranged on the compressed air delivery pipe (33), and the second electromagnetic valve (331) is used to realize the opening and closing of the compressed air delivery pipe (33); The wall-mounted air nozzle (34) is communicated with the compressed air delivery pipe (33), and the wall-mounted air nozzle (34) is arranged towards the horizontal section center of the inner cavity of the bunker wall (13).

6. A choke prevention raw coal bunker according to claim 5, characterized in that, A plurality of said wall-attached air nozzles (34) are evenly distributed along the circumference of said bin wall (13).

7. A choke prevention raw coal bunker according to claim 6, characterized in that, The number of said wall-attached air nozzles (34) provided on said compressed air delivery pipe (33) gradually increases from the direction close to said coal drop opening (12) to the direction away from said coal drop opening (12).

8. The anti-blocking raw coal bunker according to claim 7, characterized in that, A pressure adjusting member (35) is fixedly provided on said compressed air main pipe (32).

9. The anti-blocking raw coal bunker according to claim 1, characterized in that, Further comprising a rapping device (4), said rapping device (4) comprising air hammers (41), a plurality of said air hammers (41) being fixedly provided on the outer side of said bin wall (13).

10. The anti-blocking raw coal bunker according to claim 1, characterized in that, The inner side of said bin wall (13) is coated with a high polymer coating.

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