CN2254446Y - Cement shaft kiln charging stuff ball rotary fluid bed predrying apparatus - Google Patents

Abstract

The utility model relates to a cement shaft kiln charging stuff ball rotary fluid bed pre-drying apparatus, which is provided with a kiln hood, of which upper part is provided with a drying chamber, of which lower part is provided with a fluid bed studded with ventilating holes. The fluid bed is supported on a plurality of supporting wheels, and is connected with a drive motor through a transmission mechanism. The middle part of the drying chamber is provided with a center feed pipe, of which lower part is provided with a discharge hole and a revolving distributor. A discharge gate matched with the discharge hole is arranged at the position of the discharge hole; the discharge gate is connected with a servo control unit through a connecting rod; the side part of the drying chamber is provided with a feed hopper; raw and wet stuff balls are distributed into a shaft kiln after dried on the fluid bed.

Description

Cement in vertical kiln is gone into kiln pellet rotary type fluidization bed and is given drying installation

The utility model belongs to a kind of drying unit, and particularly a kind of cement in vertical kiln is gone into kiln pellet rotary type fluidization bed and given drying installation.

In manufacture of cement, the cement slurry for preparing is normally calcined in shaft kiln, is about to that the living wet feed ball of balling-up directly joins in the shaft kiln, in shaft kiln through super-dry, give heat, decomposition, calcining, be fired into cement clinker at last.Because the moisture content that living wet feed ball contains is bigger, therefore, is easy to bond together in the incinerating process, form the aniseed piece, and the ventilation of aniseed piece in shaft kiln is relatively poor, it directly has influence on the quality of cement clinker.

In order to improve the technical indicator of shaft kiln calcination, units such as Jinxi Cement Factory, first cement mill, Shenyang successively carried out the technical production test of " cement in vertical kiln drying bed " in 1994.It is to add a conical bamboo comb in the kiln hood on existing cement in vertical kiln top, giving birth to the wet feed ball is added on the bamboo comb, on bamboo comb, dewater and drying, preferably resolve the problem of living wet feed chou piece, obtained comparatively significantly techno-economic effect, raising by a relatively large margin the technical indicator of shaft kiln calcination.Wherein, the grog unit-hour output has improved 20%, and clinker quality has improved more than 10%, and power consumption has descended 10%, and grog free ca fcao drops to below 2.3%, and grog burns vector and drops to below 0.5% C ₃S has improved more than 10%, and the full blast rate reaches more than 90%, and the other technologies index also has raising in various degree, has realized closing door operation substantially, has fully proved cement in vertical kiln to be gone into kiln wet feed ball to give the exsiccant process thought be correct.But, in process of the test, also expose some problems, for example, give birth to the adhesion on dry bamboo comb of wet feed ball, stopped up the hole on the bamboo comb, so just lost and carried out the exsiccant effect giving birth to the wet feed ball; Give birth to the wet feed ball and pile up in the drying bed lower edge, the drying effect of this part material is relatively poor; The distortion of bamboo comb scaling loss is serious, and comparatively difficulty of the fire in a stove before fuel is added is judged in the bad grasp of kiln precoat thickness, is not easy to operation, and therefore difficult stable working specification or the like that forms, is difficult to be accepted by operator.

Chinese patent 95223812.8 discloses a kind of " cement in vertical kiln is gone into the fluidization of kiln pellet group and given dehumidification system ".It is a fluidization to be set give kiln above the kiln hood at shaft kiln top, the bottom of giving kiln is a stationary cloth aerofoil that is covered with ventilation hole, in the middle of the edge of air distribution plate is higher than, make pellet to intermediate flow, and revolving top cloth in kiln by giving the kiln bottom, in giving kiln, also be provided with a revolving top, the top of revolving top is provided with opening for feed, the feeding-passage of opening for feed is Z-shaped, it is to utilize material lock wind itself, will give birth to the wet feed ball with high-pressure blast in addition and be blown into and give kiln.Though thisly give the deficiency that dehumidification system has overcome " cement in vertical kiln drying bed " to a certain extent, itself also exists many problems.For example, 1, the opening for feed absolute altitude is too high, existing cement in vertical kiln is difficult to transform and implements; 2, the revolving top in the kiln is in the Working environment of high temperature, humidity, corrosion easily, and the failure rate height, and be difficult to maintenance in case break down, influence shaft kiln production; 3, equipment complexity, the cost height, auxiliary facility is many, need many equipment such as pellet screening, big pellet processing supporting with it, and the absolute altitude of pellet screening plant installation site and drop has problem, and the big pellet art breading that filters out is difficulty relatively; 4, the scrap build installation period is long, has a big risk, and the reference mark of equipment is many, in case the generation problem does not have standby measure again, is difficult for being accepted by the user.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, solves existing drying installation failure rate height, the problem that reliability is low of giving, and provides a kind of cement in vertical kiln to go into kiln pellet rotary type fluidization bed and gives drying installation.

The utility model is achieved in that

It has a kiln hood, kiln is equipped with on top at kiln hood, a fluidized-bed that is covered with ventilation hole is equipped with in the bottom of kiln, described fluidized-bed is bearing on several support rollers, and be connected with drivingmotor by transmission mechanism, drive turning down at electric motor, central feed tube is equipped with in centre at kiln, the bottom of central feed tube has discharge gate and revolving top, the discharge gate that matches with it is housed at the discharge gate place, discharge gate is connected with Servocontrol device by connecting rod, and hopper is equipped with in portion on the limit of kiln, gives birth to the edge of wet feed ball warp limit portion hopper cloth at fluidized-bed, in the exsiccant process, move to the center gradually, Servocontrol device is handled on the discharge gate and is moved, and opens discharge gate, and the siccative ball can be in revolving top be distributed into shaft kiln.

The utility model compared with prior art has following advantage:

1, adopt the charging of limit portion, and change the stationary cloth aerofoil into the rotary type fluidization bed, therefore, distribution device need be set in the kiln, not only make simplified equipment, reduced equipment manufacturing cost, and, improved reliability of operation, reduced equipment failure rate, in addition, limit portion feeding manner adapts to the absolute altitude requirement of existing producer shaft kiln charging, transform easily and enforcement, on existing " cement in vertical kiln drying bed " acquired Technology effect, fundamentally overcome the technological deficiency that " cement in vertical kiln drying bed " reaches " cement in vertical kiln is gone into the fluidization of kiln pellet group and given dehumidification system " again.

2, do not change the original distributing mode of shaft kiln and operator's working method on top of, realized that shaft kiln burns till to close door operation, the harm that when having eliminated the spray kiln operator has been caused is easy to be accepted by operator.

3, kept central feed tube, adopted limit portion's charging and central feeding dual mode, adopted the charging of limit portion at ordinary times, changed central feeding when drying installation breaks down into giving, in a single day broken down and be provided with the standby measure that wet bulb is gone into kiln for giving drying installation.

The drawing explanation:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B portion enlarged view of Fig. 1;

Fig. 4 is the C portion enlarged view of Fig. 1

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

As shown in the figure, the utility model has a kiln hood 2, kiln hood 2 is contained in the top of shaft kiln, on the top of kiln hood 2 kiln 14 is housed, extraction hood 19 is equipped with on the top of kiln 14, extraction hood 19 joins with induced draft fan, in kiln 14, form negative pressure, fluidized-bed is equipped with in bottom at kiln 14, described fluidized-bed is by air distribution plate 30, guard ring 43, annular gear ring 33 and annular slide track 46 are formed, and guard ring 43 is contained in the edge of air distribution plate 30, and gear ring 33 is contained on the guard ring 43, be covered with ventilation hole on the air distribution plate 30, heat-carrying gas in the shaft kiln is introduced in the kiln 14, and heat-carrying gas carries out heat exchange with the wet feed ball on the one hand, and pellet is upwards suspended, pellet the beating of existing vertical direction in the process that suspends has the motion of horizontal direction again; In the middle of the edge of described air distribution plate 30 is higher than, have certain gradient, pellet is moved to the center at the volley, thereby it is reinforced to produce the edge, the successive processes of center discharge; Some channel-section steels 45 also are housed below air distribution plate 30, channel-section steel 45 is radial placement, to strengthen the bulk strength of air distribution plate 30, described annular slide track 46 be contained in channel-section steel 45 below, slideway 46 places on equally distributed 8 support rollers 47, support roller 47 is contained on the bearing 7, bearing 7 is contained on the supporting base 6, supporting base 6 is fixed on the kiln 14, and described annular slide track 46 can move on support roller 47, makes the rotation of fluidized-bed become possibility; On the sidewall of kiln 14, be welded with backplate 27 and stationary tank 44, the upper end of guard ring 43 extend in the backplate 27, to prevent that material from entering between the sidewall of guard ring 43 and kiln 14, the lower end of guard ring 43 is immersed in the stationary tank 44, non-volatile liquid 42 is housed in the stationary tank 44, the gap between the sidewall of guard ring 43 and kiln 14 is sealed; Described gear ring 33 is meshed with gear 34, gear 34 is contained on the transmission shaft 35, transmission shaft 35 is installed on the sidewall of kiln 14 by bearing, stretch out from kiln 14 lower end of transmission shaft 35, belt pulley 41 is equipped with in its end, and belt pulley 41 is connected with belt pulley 37 by pulley belt 36, and belt pulley 37 is contained on the drivingmotor 38, electric motor 38 is fixed on the outer wall of kiln 14, and electric motor 38 drives the fluidized-bed revolution by pulley belt 36 and gear 34; In the centre of kiln 14 central feed tube 17 is housed, the bottom of central feed tube 17 has discharge gate 48, the discharge gate 31 that matches with it is housed at discharge gate 48 places, described discharge gate 31 is a round shape, be sleeved on the central feed tube 17, and can move thereon, two connecting rods 29 are housed on discharge gate 31, the upper end of two connecting rods 29 is connected with square connecting rod 20 respectively, the front end of connecting rod 20 is semicircle, be looped around on the outer wall of central feed tube 17, allow connecting rod 29 be on the medullary ray of central feed tube 17, so that make discharge gate 31 keep balance, the intermediate support of connecting rod 20 is on carriage 28, carriage 28 is fixed on the central feed tube 17, be connected to connecting rod 21 in the upper end of connecting rod 20, connecting rod 21 stretches out from kiln 14, and be connected with Servocontrol device 39, Servocontrol device 39 is contained on the supporting base 40, and supporting base 40 is fixed on the outer wall of kiln 14, and Servocontrol device 39 is by the certain procedure action, by connecting rod 20, connecting rod 21 and connecting rod 29 drive on the discharge gate 31, move down, open or close discharge gate 48, a handle can also be installed, so that the manual withdrawal rate of reconciling in the outer end of connecting rod 21; A revolving top is arranged in the bottom of central feed tube 17, described revolving top has a rotating tubular shaft 18, tubular shaft 18 is contained in the centre of central feed tube 17, tubular shaft 18 is by the transmission mechanism driven rotary, in the lower end of tubular shaft 18 aggregate bin 5 is housed, be hinged with cloth bucket 32 on the aggregate bin 5, on cloth bucket 32 and tubular shaft 18, be connected to wireline 4, with the downward-sloping position of restriction cloth bucket 32, an opening is arranged in the middle of the bottom of cloth bucket 32, be hinged with blanking plate 1 on the opening, be connected to wireline 3 on blanking plate 1, wireline 3 stretches out from tubular shaft 18, so that the position of control blanking plate 1, where necessary, open the opening of cloth bucket 32 bottoms, to the middle cloth of shaft kiln; Hopper 25 is equipped with in one on the limit of kiln 14, the twice windsheild is housed on the hopper 25, interior windsheild 26 and outer windsheild 22,23 are equipped with balancing weight 24 respectively on interior windsheild 26 and outer windsheild 22,23 so that when charging is interrupted the automatic hopper 25 that seals; Scraper also is housed in kiln 14, described scraper has a material scraping plate 15, material scraping plate 15 is a circular arc, the two ends of material scraping plate 15 are separately fixed on two slide shafts 9, on slide shaft 9, also be connected to web plate 16, form an integral body, described slide shaft 9 is contained in respectively on two axle sleeves 8, axle sleeve 8 is separately fixed on the outer wall of the inwall of kiln 14 and central feed tube 17, slide shaft 9 can be in axle sleeve 8 on, lower slip has a rotation axis 11 above material scraping plate 15, a connecting rod 12 is equipped with at the two ends of rotation axis 11 respectively, be connected to connecting rod 13 on the connecting rod 12, connecting rod 13 is connected with slide shaft 9, rotation rotation axis 11, and connecting rod 12 rotates thereupon, drivening rod 13 motions, connecting rod 13 drives on the slide shaft 9, move down, thereby drive on the material scraping plate 15, move down, described rotation axis 11 stretches out from the sidewall of kiln 14, in its end handle 10 is housed, so that control scraper outside.

Claims (4)

1, a kind of cement in vertical kiln is gone into kiln pellet rotary type fluidization bed and is given drying installation, it has a kiln hood (2), on the top of kiln hood (2) kiln (14) is housed, in the centre of kiln (14) central feed tube (17) is housed, the bottom of central feed tube (17) has discharge gate (48) and revolving top, it is characterized in that, in the bottom of kiln (14) fluidized-bed that is covered with ventilation hole is housed, described fluidized-bed is bearing on several support rollers (47), and be connected with drivingmotor (38) by transmission mechanism, locate to be equipped with the discharge gate (31) that matches with it at discharge gate (48), discharge gate (31) is by connecting rod (20,21,29) be connected with Servocontrol device (39), hopper (25) be housed in the limit portion of kiln (14).

2, cement in vertical kiln according to claim 1 is gone into kiln pellet rotary type fluidization bed and is given drying installation, it is characterized in that, on the sidewall of kiln (14), be welded with stationary tank (44), non-volatile liquid (42) is housed in stationary tank (44), and the guard ring on the fluidized-bed edge (43) immerses in the stationary tank (44).

3, cement in vertical kiln according to claim 1 is gone into kiln pellet rotary type fluidization bed and is given drying installation, it is characterized in that, in kiln (14), scraper is housed also, described scraper has a circular arc material scraping plate (15), the two ends of material scraping plate (15) are separately fixed on two slide shafts (9), slide shaft (9) is contained in respectively on two axle sleeves (8), and its upper and lower mobile rotation axis (11) of control is housed in the top of material scraping plate (15).

4, cement in vertical kiln according to claim 1 is gone into kiln pellet rotary type fluidization bed and is given drying installation, it is characterized in that, on hopper (25), the twice windsheild is housed, interior windsheild (26) and outer windsheild (22,23), interior windsheild (26) and outside balancing weight (24) is housed on the windsheild (22,23) respectively.

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