JPH07508093A - Grate plate with controlled air - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention generally relates to an apparatus for cooling hot material discharged from, for example, a kiln. Ru.

The general type of refrigeration device to which the present invention pertains is that the refrigeration system is for cooling particulate materials (such as mentalinka or other mineral materials) used. Such devices are moving grate cooling device, thrust grate cooling device (thrust great cooler) etc. kill The hot particulate material discharged from the outlet of the cooling system typically enters the material inlet section of the chiller. cooled down and then transported to the grates in successive rows, distributed as well as possible. further cooling is carried out on said grate, while the material to be cooled is placed in the cooling device. carried over the grate along a track extending from the material inlet to the material outlet of the cooling device. Ru. Cold air is typically blown through the hot material in the recuperation section of a chiller. The air can be further reused or recirculated as combustion air in the preceding kiln. It is surrounded.

A cooling or combustion grate typically has overlapping rows of grate plates, with the grate Some of the plates are mounted in fixed positions while others are reciprocating. this child In general, the grate plate reciprocates in the longitudinal direction, and the forward stroke in this reciprocating motion The direction in which the particulate material to be cooled moves through the cooling device and therefore means to partially facilitate the movement of material through the cooling device. The grate board is Adjacent to the carrier beam transverse to the direction of material flow through the cooling device It is attached with a grate plate that is in contact with it. The air required for cooling or combustion is It is introduced from below the grate plate through an open boat for cooling or combustion. The metal is placed on top of the grate plate to enter, enter and pass through the layer of material.

The heater plate wears out due to mechanical and thermal effects. For example, in the case of a cooling grate, Exposed areas of the grid located closer to the outlet of the cooling device have significant frictional Worn and exposed to heat while wearing on the rear unexposed part of the fire plate is lower and thermal exposure is also minimal. Ru.

Grate plates come in a variety of forms. One universal form is the so-called flat grate plate type. This literally means that the clinker is It employs a flat surface on which the mosquito is supported. In this format, A boat through which cooling air passes is located on the surface of the grate. Therefore, the clinker placed directly on top of the seat. Fall through the clinker or boat, clogging the air passages. and sometimes fall onto the underlying support structure, potentially damaging the support structure. The cooling air distribution of the grate threads may be uneven, causing the metal durability limit to be exceeded. There is always the possibility of generating high temperature areas.

Over the years, there have been significant changes from the so-called flat grate configuration.

For example, such a variant is the wedge grate format, which The front area that makes up the part is bent or the rest of the grate is flat and horizontal. It is tilted upward at an angle to the plane. In this format, the clinker Provided at the bending point a partially defined area that can rest on the surface of the grate. .

This format also helps slow the flow of clinker through the chiller, so Eventually, the red river inside the cooling system! ! ! ! (red riv There was some success in slowing down the er conditions. Typically, air It was distributed into the clinker through openings located in the upper sloped area of the grate plate. this In one form, smaller particles of hot clinker enter the air distribution holes and clog them; Alternatively, it can pass through the holes into the air distribution compartment below the grate, making it anti-falling. It did not contain any anti-sifting features.

Additionally, the clinker's tendency to remain stationary within the grate of this particular design is It was limited. This J1 was mainly established from the mid-1950s to the 1960s. used over a period of time.

Regarding alternative designs of grate plates, in the early 1950's the present invention was widely accepted. is basically a grate with a large depression on the top that can hold the clinker. A specially designed grate plate commonly known as a "dish" grate plate consisting of child plates is installed. measured and sold. Its main purpose is to store most of the clinker material in its basic static state. This reduces wear and reduces wear. Extends the lifespan of the grate plate, and provides a red riv improved resistance to thermal shock conditions) I liked it. The grate plate can be used in reciprocating or stationary mode. Ta.

The cross-section of said prior art grate plate is in the form of a dish, hence its universal name It has different degrees of darkness, and the deepest hollow is probably derived from fire. Located at the rear of the grate plate in the non-exposed area of the grate plate. called "non-exposed area" The term refers to a fire that is covered, at least some of the time, by an overlap of preceding grate plates. This means the area on the top surface of the grid plate. The area is in front of the grate plate, that is, in the cooling device. It was not deep enough towards the part of the grid closer to the material exit.

Air is drawn statically through multiple air distribution holes located in the exposed shallow part of the grate plate. It was distributed directly to the clinker which was kept in a stationary state. In this design The problem is that some clinker in shallow areas is placed directly on top of the air distribution holes. Therefore, some clinker may be present in the room air distribution hole, especially when the cooling fan is stopped. There was a possibility that it would fall.

Prior art designs do not have any anti-sifting characteristics. air discharge into the clinker through the air distribution holes is fast. , and the type sold has a single Because it consists of a grate, even if only a small area of the grate becomes excessively worn, the grate will remain intact. The whole thing had to be replaced, making maintenance expensive and cumbersome.

do. The grate plate of the invention is particularly well suited for receiving a controlled air supply. are doing. The present invention is particularly useful for cooling cement clinker after leaving the kiln. It is. The cooling system adopted by the grate plate has a material inlet, a material outlet and a typical It consists of several rows of grate plates that are alternating between stationary and reciprocating sections. There is. The grate plates in each row are cooled transversely to the flow of material through the cooling device. Extends across the width of the device. The grate plate of each preceding row is the grate plate of the following row. It overlaps with the child plate. The underside of each grate plate is attached to a carrier beam .

The top surface of the grate plate should never overlap any part of the preceding grate. the part located in the forward part of the cooling device, i.e. the part closer to the material outlet end of the cooling device and an unexposed region that overlaps at least temporarily with the preceding grid. divided. The grate plate of the invention is suitable for receiving a controlled supply of air .

In one embodiment of the grid plate according to the invention, substantially the entire surface area of the exposed surface is It is recessed from both the upper edge of the outer periphery and the generally flush surface of the non-exposed region.

The recessed area is generally shaped to receive the particulate material that is being cooled. It is. Preferably, the majority of the material remaining in the hollowed out area is in a static state. Ru. The shape of the exposed area is shaped by alternating rows of hollows/indentations. Defined by an air distribution passageway and a secondary air distribution channel. In particular, through cooling equipment at least one material extending generally the entire distance of the exposed area generally parallel to the direction of movement of the material. There are, preferably a plurality of generally hollow air distribution passages. air distribution passages and Immediately below the secondary air flow path is located an air chamber that is connected to a source of cooling air.

Air distribution passages should be in contact with the top surface and with any material being conveyed through the cooling system. Cut out the two sides that will turn out. Additionally, the cooling air is routed through the air chamber from the underside of the grate plate. into the air distribution passageway and travels the length of said passageway, and the side wall of the air distribution passageway. The secondary air exits through a plurality of air inlets or outlets located at the secondary air distribution channel.

In the recessed version according to the invention, the moving air is Material held within the area and/or conveyed through the cooling device by grate plates guided through the material that is Are air distribution passages located on the sides of the grate plate? , or on the longitudinal side of that one slender F, depending on whether it is located toward the center. approximately the entire exposed area in a direction parallel to the movement through the cooling device. Adjacent to an open secondary air distribution channel extending a distance. Secondary air distribution channel between two adjacent air distribution passages or between an air distribution passage and an exposed area of the grate plate. Located somewhere between the inner wall of the area. Air distribution conduits and secondary air distribution channels By alternating the positions of the two, a raised effect is generated above the exposed area. dew The output area is the front inner wall of the grate plate, that is, the side wall on the opposite side of the 1tir pressing surface. , the inner wall of the exposed area of the grate plate and the non-exposed area extending parallel to the forward pressing surface. and the adjacent side of the

One of the structural advantages of the grate plate cooling air distribution device according to the invention is that the cooling air The air is first discharged through the distribution outlet and passes through the area where the retained clinker is placed. This reduces the velocity of the cooling air compared to traditional open grid designs as it moves around the scales. That is. Such speed reduction provides a number of advantages as described below. (Fever recovery (2) the secondary air temperature is higher; (3) normal conditions as well as Red River (4) within the retained tarinka mass, which does not promote fluidization of the clinker during the condition; The retention factor of the cooling air is larger, ( 5) Due to the high velocity of the captured object, which wears down the air inlet and surrounding grate plate surfaces, the fire (6) Cooling is improved; the wear characteristics on the grid are smaller; Just mentioned a few things is as above. The actual air velocity achieved is the cooling air velocity into the secondary air flow path. Partially directly by the form of the primary cooling air outlet and the secondary air flow path leading to the discharge affected. Details of both formats are provided below. In the preferred embodiment described below The velocity of the cooling air is as required to adequately cool the material while maintaining the desired anti-drop resistance (a Minimum velocity of cooling air to promote anti-sifting) and anti-fluidization properties It is expected that the velocity of cooling air for utilization will be optimized. In this regard, The final velocity of the air through the secondary air flow path also differs from the design of the secondary air outlet and the secondary air flow path. is a function of the element of -, which remains in the secondary air flow path and the hanging material is the packing factor of the material. Preferred configuration of the present invention Another advantage is that exposed areas can be recessed or essentially contain material in a static state. be. The loss of momentum of the material relative to the exposed metal surface of the grate plate is the Significantly reduces wear in this area.

Drawing description FIG. 1 is a top view of a preferred embodiment of the present invention, and FIG. 2 is a view taken along line A--A in FIG. In addition, FIG. 3 is a sectional view of the embodiment shown in FIG. 1, and FIG. 3 is a cross-sectional view of the embodiment shown in FIG. 3 is another cross-sectional view of the embodiment shown in the figure; FIG. The same number in all drawings indicates the same element. show.

Description of the invention Referring to Figures 1, 2 and 3, the stationary model is designated generally by the numeral 2o. 1 shows an embodiment of a grate plate according to the invention which can be used in a reciprocating or reciprocating mode. has been done.

The view of the grate plate 20 shown in FIG. The exposed area 7o defined by the longitudinal boundary indicated by the dotted line 61 and the line 6° It is divided into a defined non-exposed area 71. The material is longitudinal in the direction shown by arrow F. Move through the cooling device in the direction. The boundaries of the exposed area are further defined by outer walls 21, 22, It is defined by a front pressing surface 23 having an upper edge 24 and an edge 25 of the non-exposed area. It is.

In the format shown, the main part of the exposed area is omitted; The depression starts from the upper edge 24 of the front pressing surface 23 and extends from the upper longitudinal edges 26, 27 and and reaches the front surface 28 of the non-exposed area.

As the material moves through the cooling device, it generally falls onto the exposed area.

The surface 28 of the non-exposed area is immediately posterior in the cooling device during operation of the cooling device. Covered at least temporarily by an overlap by the grate plate. The preceding grate plate is Either at rest or in reciprocating motion.

The recess in the exposed area of the grate plate constituting one embodiment of the present invention is similar to PA40 in Fig. 3. The references are well recognized. The line 40 is the highest located on the top surface of the grate plate 20. In the embodiment shown in FIGS. 1 to 3, the upper longitudinal edge 26 is not exposed. The plane 28 of the region represents a plane that intersects a point lying in the same plane as the upper edge 24.

The exposed area 70 has at least one, and preferably several, air distribution channels through which cooling air passes. It is located on aisle 30. The cooling air is supplied to a carrier located below the grate plate 20. Mainly from the air chamber 33 which is open to the cooling air flowing from the beam 80. is provided to the air distribution passageway 30. Cooling air is distributed between exposed and non-exposed areas. The air distribution passage 30 and the air flow horizontally from the lower part of the grate plate in the vicinity of the You can now enter room 33. In addition, the cooling air is distributed to the air distribution passage 30 and the air chamber 33. It can also go vertically. An air distribution passage 30 is provided for the flow of material through the cooling device. It is a hollow structure extending essentially over its entire exposed length.

The cooling air is distributed longitudinally in the same direction as the material flow, i.e. from back to front. Proceed through distribution path 30. The cooling air is passed through the air distribution via the primary air supply 55. From the passage 30, the secondary air passage 56 is discharged. Secondary air passage 56 is similar to passage 30 extending generally the entire length of the exposed area and alternating with passages 30 to cover the entire recessed area. Generally fulfilled. Referring to FIG. 2, the secondary air flow path 56 includes two (as shown) between adjacent air distribution passages 30 or at the inner longitudinal edges 29 of the grate plate 20 Or, it can be located anywhere between 29a and the adjacent air passage. the latter optional The form of is not shown.

The air distribution passage 30 is formed by a secondary air distribution channel on the inner wall of the longitudinal edge of the exposed area. or, in some embodiments, flush with the inner wall. I can do it.

Air passing through primary air outlet 55 is directed into secondary air flow path 56 . air is downward The secondary air flow path 56 is guided at an angle, that is, at an angle slightly below horizontal. That's preferable. Of course, the secondary air passage 56 is connected to the side wall 58 of the adjacent air passage 3o. determined by the shape of at least one of them.

FIG. 2 shows the upper surface 32 of the air passage 30 or the protrusion surrounding the primary air conduit 55. Anti-sifting features of the present invention ) shows an embodiment of the present invention that improves In addition, surrounding the − secondary air outlet, Generate outer cooling channels within the air distribution channels that extend essentially the entire length of the exposed area. Air distribution is better because there is a bulge that can be opened. A position in front of the enclosing part When the air is blocked by clinker, the air moves freely to another location where no blockage occurs. .

- The secondary air outlet 55 is located on the side wall 58 of the air distribution passage 3o, with its long side facing the cooling device. It is provided as a rectangular elongated 6o which is approximately parallel to the flow direction of the passing material 14. That's preferable. The elongated hole may be located at a lower portion of the secondary air distribution channel 56. preferable. Since the elongated hole 60 is located in the side wall 58 of the air distribution passage 3o, the air First, the primary air outlet 55 is discharged transversely to the flow of clinker through the cooling device. Served. Rather than having one slot in each side wall that runs the length of the air distribution conduit. Rather, it is preferred to have multiple slots located along the length of each mIJ wall 58. stomach.

This configuration has been found to have a number of advantages. For example, on the structure of the grate plate -Improve i-ability. Conveying speed that minimizes material backflow into the slot or air conduit. maintain. Furthermore, by minimizing the IJ) output speed, the possibility of fluidization is reduced. reduce FIG. 3 shows a preferred embodiment of the arrangement of slots 60.

In other embodiments of the invention, the width and length of the slots can be varied.

A particularly advantageous feature of the invention is that the secondary air outlet 56 is arranged immediately adjacent the primary air outlet 55. In addition, it was included in relation to fluid communication. As shown, fire (exposed area of δ plate) a plurality of sections extending essentially parallel to the direction of material flow over virtually the entire length of the A secondary air flow path is provided. The secondary air channel acts as a nozzle and Reduces the velocity of cooling air discharged into the retention area, reducing the possibility of clinker fluidization lower.

Air distribution passageway 30 is generally narrower than secondary air passageway 56. Regarding this point , the preferred configuration of the secondary air flow path has a length to width ratio of about 4.1 to about 1. 2:1, more preferably about 6:1 to about 10:1. I made it clear. If the length to width ratio of the secondary air flow path is greater than 12:1, these The velocity of the air through the flow path is higher than in the preferred case. If the ratio is less than 4:l In this case, the performance of the secondary air flow path is severely impaired and it does not function as a nozzle.

If a given grate plate has multiple air distribution passages or secondary air passages, one or more of the width and/or height from the corresponding air distribution passageway or secondary air passageway. You can change the size. In another embodiment, all of the secondary air channels are of the same depth and depth. and (or) width, with all air passages having the same height and/or width. I can do it.

The top surface 32 of each of the air distribution passages 30 is cleaned of the least amount of clinker in the hollow area. Only enough of the melons are preferred so that some, preferably most, of them remain stationary. Alternatively, it is preferable to set the angle from the plane shown by line 40.

In the embodiment shown in FIG. 2, the side edges 27 overlap the edges 21 of the adjacent grate plates. clinker by matching the bottom edge 26a or edge 27 to create an overlapping joint. or from plane 4o to the extent that it effectively removes IJ from falling between the adjacent grate plates. Kuhontairu. Alternatively, the longitudinal edges of the grate plates are identical in height and shape to each other. Adjacent grate plates may abut rather than overlap.

The grate plate of the invention can be installed in any row of cooling equipment without changing its unique characteristics. It can be modified in a manner well known to those skilled in the art so that it can be used in any environment.

Continuation of front page (72) Inventor: Holland, Robert, H.

Amon Way, Whitehall, Pennsylvania, United States 18052 4341 (72) Inventor Bride, George, W.

Kutztown, Pennsylvania, United States 19530 code (72) Inventors: Masaguchi, Michael, Earl 6. Junior United States 196 06 4512 Hilsol Road, Reading, Pennsylvania

Claims (16)

[Claims] 1. It has a material inlet, a material outlet and multiple rows of grate plates, with a grate in each preceding row. Particle material in a predetermined direction through the cooling device where the child plate overlaps a portion of the grate plate of the subsequent row. a grate plate for carrying, attached to the outer edge, top surface and carrier beam an exposed area in which the upper surface never overlaps the preceding grate; and an unexposed area that overlaps at least temporarily. (a) the exposed area is arranged in a direction parallel to the movement of the material through the cooling device; A generally hollow air distribution passage extending substantially the entire distance of the exposed area, the an upper surface that comes into contact with some of the particulate material being carried through the cooling device; (b) movement of particulate material through the cooling device; a narrow opening extending substantially the entire distance of the exposed area in a direction parallel to the defined by alternating rows of released secondary air distribution channels, said air passages and said air passages; A plurality of air chambers are located below the air flow path, each of the side walls of the air distribution passage. A plurality of primary air outlets are located in the air chamber through which the cooling air is directed to the air chamber. from the interior to the air distribution passage and finally to the adjacent secondary air distribution via the primary air outlet A grate plate characterized by flowing into a channel. 2. Generally the entire exposed area is on the top surface of its outer edge to accommodate a certain amount of particulate material. 2. A grate plate according to claim 1, which is hollow. 3. Claim 2, wherein substantially all material remaining within the exposed area is in a static state. Temporary grate as described in section. 4. The longitudinal edges of adjacent grate plates in a row are fitted so that they overlap each other. The grate plate according to item 1. 5. At least some of the primary air outlets are rectangular slot holes in the side walls of the air passage. , and the longitudinal side of the elongated hole is aligned with the direction in which the material moves through the cooling device. The grate plates according to claim 1, which are parallel. 6. Claim 5, wherein the elongated hole is located in the lower part of the air distribution channel. Temporary grate. 7. Cooling air flows downward through the primary air outlet to the adjacent secondary air distribution channel. A grate plate according to claim 1. 8. According to claim 1, a plurality of air distribution passages having different widths are provided. Grate board as described. 9. Claim 1: A plurality of air distribution passages having different heights are provided. Grate board as described in. 10. The length to width ratio of the secondary air distribution flow is in the range of about 4:1 to about 12:1. A grate plate according to claim 1. 11. The air distribution passageway is separated from the longitudinal sidewalls of the exposed area by a secondary air distribution channel. 2. A grate plate according to claim 1 which is spaced apart. 12. at least one air distribution located against the longitudinal sidewall of the exposed area; A grate plate according to claim 1, having passages. 13. Claims in which the upper surface of the air distribution passage protrudes above the primary air distribution outlet. The grate plate according to paragraph 1. 14. A grate plate according to claim 1, wherein said material is cement clinker. 15. It has a material inlet, a material outlet, and multiple rows of grate plates, with each preceding row having a material inlet, a material outlet, and multiple rows of grate plates. Particles are directed in a predetermined direction through the cooling device where the grate plate overlaps a portion of the grate plate of the subsequent row. A grate plate for conveying materials, which is attached to the outer edge, the top surface and the grate support. a lower surface that is covered by a grate, said upper surface never being overlapped by a preceding grate; and an unexposed area that overlaps at least temporarily, with a column grate plates that fit together so that the longitudinal edges of adjacent grate plates overlap each other. hand, substantially the entire exposed surface is (a) parallel to the movement of the particulate material through the cooling device; a plurality of generally hollow air distribution passageways extending generally the entire distance of said exposed region in a direction; This means that the particulate material being transported through the cooling system will come into contact with it to some extent. (b) for the movement of particulate material through the cooling device; a plurality of narrow open secondary airways extending substantially the entire distance of said exposed area in parallel directions; defined by alternating rows of air passages and said air distribution passages; A plurality of air chambers are located below and a plurality of air chambers are located on each side wall of the air distribution passageway. A primary air outlet is located through which cooling air passes through the primary air outlet. The air flows downward from the inside of the air distribution passage into the adjacent secondary air distribution passage, and the primary air at least some of the air outlets are in the form of rectangular slots in the side walls of the air passage; The longitudinal sides of the elongated holes are parallel to the direction of material flow through the cooling device. A grate board characterized by: 16. Approximately the entire exposed area is separated from its outer edge to accommodate a certain amount of particulate material. 16. The grate according to claim 15, which is recessed from the top surface.