RU91149U1 - CLINKER COOLER - Google Patents

Abstract

Clinker cooler containing a starting module, slotted cassettes, crusher, air chambers, fixed grates, through which cooling air enters the clinker layer under pressure, characterized in that the fixed grates, which are a closed hollow structure, are interconnected by longitudinal seal screens, fixed grates and sealing screens form an immovable frame mounted on racks located in the longitudinal gaps along the cooler between the movable sections with slotted cassettes and, through the grate and screens clinker-seal layer further pressurized cooling air.

Description

The utility model relates to clinker coolers used in furnace units (when firing cement clinker).

The design of the grate-type fridge of the repulsive type is known (S.G. Silenok, Yu.S. Grizak, V.N. Lyamin, P.L. Tikhomirov, N.I. Andreev. Furnace units of the cement industry. Engineering. M. 1984.). The grate, which is the main working body of the cooler, is designed to transport the material during its cooling. The grill divides the entire cooler chamber in height into two parts. A clinker layer moves along the surface of the grate, cooling air is supplied to the armrest space. The grill consists of many grates. Each grate is a cast of heat-resistant (and expensive) steel with slotted holes (5-6 mm wide) to allow air to pass through to cool the clinker layer. Small pieces of material that fall through these openings and the gaps between the grates down into the armrest space are removed using scraper conveyors having a drive and a tension station.

A disadvantage of the known technical solution is the complexity of the design, which consists in its many details, and the use of expensive, steel castings (grates).

Known technical means described in German patent No. 4320725 A1, CL.F27B, publ. 01/05/1995, 6 pp., In which cooling air is supplied through fixed grid-irons with a cross section in the form of a bent corner, installed at intervals. This technical device is taken by the authors as a prototype.

According to US patent No. 5992334 A, CL F23H 3/00, publ. 11/30/1999, 10 pages. The cooler has slotted cartridges, above which fixed grates are installed.

By Ac. USSR No. 727961 A, CL F27B 7/38, publ. 04/20/1980, 3 pages. The cooler includes an inclined grate and grates, through which cooling air enters the clinker layer under pressure.

The objective of the utility model is to simplify the design of the clinker cooler while achieving more improved thermal performance achieved at the current level of development of the grate-type coolers of the repulsive type.

The technical result consists in the application

a) a moving floor (recruited from movable sections with cassettes) instead of the grate on the one hand and the elimination of conveyors of the spill as an indispensable unit of the cooler design on the other;

b) fixed grates, which are a closed hollow structure, in the bottom sheet (facing the bed, formed by a relatively motionless layer of cooled clinker particles and filling the cartridge cavity) which have slotted openings for passing cooling air;

c) sealing screens - longitudinal elements connecting fixed grates and forming together with them an immovable frame mounted on racks located in longitudinal (along the refrigerator) gaps between the movable sections of the cassette grid floor.

The technical result is achieved by the fact that in the clinker cooler containing the starting module, slotted cassettes (forming the floor, making a reciprocating motion), crusher (located above the moving floor), air chambers, fixed grates:

firstly, longitudinal sealing screens, connecting with fixed grates, form together with them an immovable frame mounted on racks located in the gaps between the movable sections with slotted cassettes; through the grates and seal screens, the cooling air is additionally pressurized into the clinker layer;

secondly, the floor of the movable cassettes is composed of elements (a cross section in the form of circular arcs or channels with shelves bent outward) that are alternately mounted from above and below and overlap so that longitudinal gaps are formed between their edges (through which air is supplied under pressure to clinker layer cooling);

thirdly, the starter module is equipped with a drive that regulates its inclination;

fourthly, the inclination of the movable sections with cassettes to the horizon is regulated by the drive.

Figure 1 shows a schematic diagram of a clinker cooler; figure 2 is a structural diagram of a part of the cassette lattice (including the starting module); figure 3 is a view In figure 2; figure 4 is a section bB in figure 2; figure 5 - remote element A in figure 2; in Fig.6 is a section GG in Fig.5.

In the direction of the clinker falling out of the rotary kiln, at the beginning of the cooler, the start module 1 is installed. The start module 1 is installed obliquely and takes on the shock load of the falling clinker. The inclination of the starting module is regulated by the drive 2. The clinker is transported by moving sections with cassettes 3, which make a reciprocating motion. Structurally, the leading edge of the first section extends under the starting module, resulting in a threshold 4. Each cassette 3 is a box filled with a layer of clinker particles (which is a kind of thermal protection of the floor); this layer is constant, blown by cooling air and moves with the section. Depending on the length of the refrigerator (determined by its performance), there can be several moving sections with cartridges. Each separate movable section with cassettes is installed above the leading edge of the next one with the formation of thresholds 5. At the location of threshold 5, which separates the refrigerator into two zones: “hot” and before cooling, a hammer crusher can be installed 6. Above the movable sections with cartridges 3 are installed with The interval is fixed grates 7, through which cooling air enters the clinker layer under pressure. Fixed grates 7 are interconnected by shields-seals 8, which, together with the supporting posts 9 and grates 7 form a rigid frame mounted on the frame of the base of the refrigerator. The supporting racks 9 are located in the longitudinal (along the refrigerator) gaps 10 between the movable sections with cartridges 3. The fixed grate 7 is made in the form of a closed hollow structure. In the bottom sheet 11 of the grate there are slotted openings 12. The sealing screens 8 round the sides of the cassettes 3 with the formation of a longitudinal slit 13. Through the slotted openings 12 of the grate and the longitudinal slots 13, additional cooling air enters under pressure. The floor of the movable cassettes 3 is composed of elements 14 (cross section in the form of circular arcs or channels with shelves bent outward), mounted alternately from above and below and overlapping so that longitudinal slots 15 are formed between their edges (through which the main air is supplied under pressure clinker layer cooling). Movable sections with cassettes 3 can be moved at an angle to the horizontal. Under the movable cartridges are air chambers 16.

The proposed device operates as follows.

During operation of the furnace unit, the material falls out of the rotary kiln and falls onto the inclined start module 1. The inclination of the start module 1 contributes to the clinker being dumped onto the first movable cartridge 3. When the cartridge 3 is moved back through threshold 4, the clinker accumulates on the cartridge, and when it moves forward pushed forward to the exit (from the refrigerator), thereby freeing up space for the next batch of material. Similarly, the effect on the clinker layer of threshold 5. The cooled clinker layer moves relative to the cassette along the bed, formed by a relatively fixed layer of cooled particles of the same clinker and filling the cavity of the cassettes 3, made in the form of a box. This layer is constantly blown by the bulk of the air coming from the air chamber 16. The elements of the cassette floor 14, located with overlap, form longitudinal slots 15 for blowing cold air into the hot clinker layer on the one hand, and exclude clinker particles from falling into the air chamber on the other. As it moves toward the exit, the hot clinker layer is pushed through a series of fixed grates 7 sequentially set at intervals, mixed and blown with additional cold air supplied under pressure into the cavity of these grates and sucked out through the slotted holes 12. The back of the grates 7 similarly to thresholds 4 and 5 contributes to advance (push) the clinker forward to the exit of the refrigerator. The action of the seal screens 8 is similar. The cold additional air is screened and passes through the longitudinal slots 15 into the clinker layer, at the same time by its pressure contributing to the absence of particles of material in the gap 10 between the movable sections with cartridges, i.e. is an air seal of the gap between the sections. Crusher 6 grinds large pieces of clinker.

The proposed device in comparison with analogues will allow:

1) to exclude the failure of small clinker particles into the space of the refrigerator under the cassette, which eliminates the presence of the conveyor spill as a mandatory unit of construction;

2) to exclude from the design of the refrigerator cast grate. The design of the movable cartridge, made in the form of a box, allows for the presence of a relatively motionless constant layer of cold clinker (constantly blown with cooling air). This layer is a thermal protection. As a result, instead of many expensive casting grates, it is possible to manufacture cassette floor elements from rolled profiles (channel with bent shelves) or sheets (with a cross section in the form of circular arcs);

3) to provide cooling for the stationary grate located inside the hot, movable clinker layer by pumping cold air through it under pressure and passing into the clinker layer, both against its movement and along it;

4) the presence of an immovable frame formed by fixed transverse grid-irons and longitudinal screens-seals, contributes to the organization of injection of additional cold air into the clinker layer;

5) the use of a hammer crusher immediately after the “hot” zone of the refrigerator facilitates easier grinding of the “welds” possible as a result of the clinker firing process due to their relatively high temperature than at the outlet of the refrigerator, where they cooled acquire a higher surface hardness;

6) the absence of grates (used in counterparts to repel clinker) excludes the possibility of their detachment and stopping or breakage of the crusher due to the ingress of metal parts into it;

7) the location of fixed grates above the movable cassettes provides the convenience of replacing them in case of wear. Forced cooling them with cold air contributes to the possibility of their manufacture from heat-resistant sheet steel;

8) air is supplied to the clinker layer in two directions:

the main one - through the floor of the cassette (due to the presence of longitudinal slots in the floor of the cassette) and the additional - through the fixed grid-irons and sealing screens (due to the presence of slotted holes in the bottom sheet of the grate and the longitudinal slots between the screens enveloping the sides of the cassette boxes). This, as well as transshipment of the layer through the thresholds (formed by fixed grid-irons), suggests a more intense heat exchange between the hot clinker particles and cold air;

9) the thresholds formed by the start module and the movable sections with cassettes facilitate pushing (movement) of the clinker to the exit of the refrigerator;

10) the slope of the moving reciprocating sections with cartridges contributes to a more rapid advancement of the clinker layer to the exit of the refrigerator.

Claims (1)

Clinker cooler containing a starting module, slotted cassettes, crusher, air chambers, fixed grates, through which cooling air enters the clinker layer under pressure, characterized in that the fixed grates, which are a closed hollow structure, are interconnected by longitudinal seal screens, fixed grates and sealing screens form an immovable frame mounted on racks located in the longitudinal gaps along the cooler between the movable sections with slotted cassettes and, through the grate and screens clinker-seal layer further pressurized cooling air.