CN2333897Y

CN2333897Y - Rotary-drum clinker-cooling machine

Info

Publication number: CN2333897Y
Application number: CN 98219655
Authority: CN
Inventors: 张鹏; 陈伯南
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-14
Filing date: 1998-08-14
Publication date: 1999-08-18
Anticipated expiration: 2008-08-14

Abstract

The utility model discloses roller slag cooling machine which is a slag cooling device for a circulating fluidized bed boiler in a heat power plant, composed of a roller, a water inlet and outlet device, a dosing device and a chain wheel driving mechanism. The body roller of the slag cooling machine is mainly composed of a roller body, a spiral water tank on the outer wall of the roller body, a multiple spiral feeding pipe in the roller body and a lifting plate; when the roller is driven to rotate, hot slag is guided by the multiple spiral feeding pipe to go forwards in the roller body; simultaneously, cooling water flows across the spiral water tank and the multiple spiral feeding pipe to carry out heat exchange with the hot slag; natural wind used as secondary cooling medium takes part in the heat exchange through the roller body, and the hot slag is gradually cooled during conveying. The slag cooling machine has the advantages of good cooling performance, and the utility model can reliably work under the high-temperature condition.

Description

Cylinder type cold slag machine

The utility model relates to a kind of cylinder type cold slag machine, is mainly used in steam power plant, and the high temperature furnace slag with the discharging of dry method cooling delivery cycle fluidized-bed combustion boiler also can cool off and carry the little hot solid material of other granularities.

The preferred type of furnace of CFBB steam power plant, however supporting with it slag removal equipment does not obtain satisfied solution.At present, domestic existing manufacturer production cylinder type cold slag machine, its agent structure is the fixedly rotatable double-layer seal sleeve of helical blade of interior welds, helical blade plays guide and advances, and carries out indirect heat exchange by cooling water and warm sludge between sleeve seal.Can also pass through natural wind in the sleeve, play auxiliary cooling effect.The advantage of this cylinder type cold slag machine is that the body wearing and tearing are few.Its shortcoming is: the flow of cooling water on the double layer sleeve barrel is inhomogeneous, and stagnation, short circuit phenomenon are arranged, and helical blade does not have refrigerating function, so cooling effect is poor; Outlet pipe is arranged in feed side, and it is heavy that feed pipe can only depart from feeding mouth center cloth, produces to leak slag; Helical blade welds fixing in cylindrical shell, and telescopic resilience is poor, and difficulty of processing is big, can't overhaul replacing during damage.

The purpose of this utility model is the agent structure of a kind of novel cold slag machine of design, fundamentally overcomes the shortcoming of existing cylinder type cold slag machine, for CFBB provides a kind of performance better modified cylinder type cold slag machine.

The purpose of this utility model is achieved in that cylinder type cold slag machine as a complete device, comprises parts such as cylinder, cooling water Inlet and outlet water device, charging gear, transmission mechanism, discharge chute and base.Its operation principle is: when cylinder was rotated by actuator drives, the warm sludge that boiler is discharged was advanced by many spirals passage guiding in charging gear enters cylinder.Meanwhile, add cooling water and constantly pass through in the spiral tank from the cylinder and the many spirals passage in the cylinder, carry out heat exchange with warm sludge indirectly, play main cooling effect; Natural wind also constantly by cylindrical shell, directly carries out heat exchange with warm sludge, plays auxiliary cooling effect.

The cylinder of cold slag machine mainly is made up of cylindrical shell, spiral tank, many spirals passage and riser.It is the main body of cold slag machine, also is substance of the present utility model, and its architectural feature is as follows:

Cylindrical shell is selected the thicker major diameter spiral seam welded still pipe of tube wall for use, and caliber and pipe range are determined according to factors such as the disposal ability of cold slag machine and mounting arrangements requirements.

The spiral tank is made up of spiral marine riser and flume wall.The spiral marine riser is the helix tube that is processed through clod wash by elongated minor diameter seamless steel tube.In order under the prerequisite that keeps spiral tank height, to adopt the more spiral marine riser of minor diameter, the round steel (or steel pipe) that spiral marine riser bottom has bed hedgehopping to use, they tightly are surrounded on the cylinder body outer wall, the spot welding location.Overlap joint is by the flume wall of steel plate cutting, seal welding on the spiral marine riser.Behind the flume wall overlap joint, still leave the wide exposed tube wall of about 20mm in the outermost elongated scope of spiral marine riser, open long otch on it.The sealing screw tank of Gou Chenging is paperwrapped on the whole cylindrical shell like this, and section is rectangular substantially, and height is by the size decision of spiral marine riser and round steel, and width is determined by spiral marine riser pitch.Spiral tank section size is pressed the cooling water throughput and is determined.Spiral tank one end links to each other with inlet pipeline, and the other end is communicated with many spirals passage, forms cooling-water duct.The spiral tank can make cooling water evenly flow on cylinder body outer wall, eliminate and stagnate the dead band, thus can give full play to the cooling effect of cylindrical shell, because the spiral marine riser has otch, so the spiral tank has good telescopic resilience, can adapt to the abominable condition of work of the high temperature and the big temperature difference.

Many spirals passage is the one group of helix tube that is sleeved on after being processed by the uniform pitch clod wash by two (or three) elongated seamless steel pipe together, its spiral external diameter is slightly less than cylinder internal diameter, spiral height (by screwed pipe number and the decision of screwed pipe caliber) determines that according to factors such as cylindrical shell size, disposal ability and processing requests pitch is then according to satisfying the material gait of march and can making material and barrel, tube wall have maximum contact-making surface to determine.Assembled is adopted in the installation of many spirals passage, and integral body is packed in the cylindrical shell, compression a little, and the spiral external diameter strengthens, and can realize cooperating with the degree of tightness of cylindrical shell appropriateness, can fix in cylindrical shell, also the leeway of expanding can be arranged when being heated.Many spirals passage one end and outlet pipeline join (welding), and the other end is communicated with the spiral tank by special pipe joint.The inlet tube and outlet tube of cylinder exit side adopts the concentric tubes of different tube diameters, and its center line overlaps with cylinder axis.Many spirals passage has the double action of material guiding and cooling concurrently.

Riser adopts the small bore band steel, is overlapped on the outer spiral tube of many spirals passage, and the outside tube wall of outer and outer spiral tube is evened up, and becomes 15-20 degree angle with the axis of screw of many spirals passage, overlap joint 8-12 sheet between per two spiral coils.After adding riser, material increases at the lifting height of cylinder inboard wall, and material can not slide along barrel, but freely is scattered after arriving certain altitude, advances evenly stirring in the process, has both increased cold slag effect, can eliminate the wearing and tearing of material to barrel substantially again.

The utility model and existing cylinder type cold slag machine ratio have the following advantages:

1, spiral tank of the present utility model can be given full play to the cold slag function of cylindrical shell, and has increased many spirals passage that can carry out efficient heat exchange newly, so cooling performance significantly improves.

2, spiral tank of the present utility model and many spirals passage, the corresponding component of light existing cylinder type cold slag machine has bigger stroke and better telescopic resilience, so can adapt to the abominable condition of work of the high temperature and the big temperature difference better, increase the equipment reliability of operation.

3, many spirals passage adopts fabricated construction, and clod wash processing had both improved processing conditions, makes the maintenance of material guide device, replacing become possibility again.

4, water outlet of the present utility model and inlet pipeline are arranged in the cylinder exit side, are fixed on the centre of cylinder charging one side so feed pipe is had ready conditions, and the cylinder feeding mouth can reduce, and leaking the slag problem can thoroughly solve.

The contrast accompanying drawing describes below:

Fig. 1: cylinder type cold slag machine roller frame figure; The A-A cutaway view of Fig. 2: Fig. 1; 1 node enlarged drawing, 1 Fig. 4 of Fig. 3: Fig. 1: cylinder type cold slag machine assembly drawing.

Cold slag machine cylinder (16) is mainly by cylindrical shell (1), spiral tank, many spirals passage (5) and riser (6) Form. The spiral tank be by the spiral waterproof pipe (2) of opening long otch, flume wall (4) consist of have telescopic resilience, The spiral tank of sealing structure. In order to increase spiral tank height, perhaps in order to adopt pipe with small pipe diameter spiral waterproof pipe, In the bottom of spiral waterproof pipe with elongated round steel (3) or steel pipe bed hedgehopping. Many spirals of installing in cylindrical shell are led Material pipe (5) is combined by two (or three) uniform pitch helix tubes. Its spiral external diameter is slightly less than cylinder internal diameter, Cooperate for appropriate degree of tightness between many spirals passage and the cylindrical shell. Riser (6) be overlapped in many spirals passage outside On the helix tube, overlap joint 8-12 sheet between per two spiral coils. Cooling water inlet pipe (8) and outlet pipe (9) are sleeved on Together, introduce from cylinder discharge side center, cooling water inlet pipe connects the spiral tank, and outlet pipe connects many spirals guide Pipe; Connect by special pipe joint (7) and many spirals passage at feed side spiral tank. The cylinder exit side Inlet tube and outlet tube adopts the concentric tubes of different tube diameters, and its center line overlaps with cylinder axis, and respectively by advancing Water swivel (17) and go out water swivel (18) and connect with outer pipeline. Have on the flume wall of cylinder and can seal Steam vent (13), the air when filling cooling water in emptying spiral tank and the many spirals guide. Giving of cylinder Material pipe (14) is fixed on the centre of cylinder feed side, cylinder middle part fixed chain wheels (15). Whole cylinder is by solid The four groups of support rollers (25) that fix on the base (19) support by two rolling rings (10). In order to make holding of rolling ring and sprocket wheel The power of carrying can be added on the cylindrical shell of heavy wall, in cylindrical shell and the flume wall among installing four of each rolling ring and chain wheel location Individual interior cushion block QD and outer cushion block (12). Cylinder exit side installing discharge chute (20). The charging gear of cold slag machine by Impeller feed hopper (21), the chain wheel driving mechanism (containing sprocket wheel (22), (23) and chain (24)) of heat proof material processing Feed pipe (14) and underframe (26) form. Sprocket wheel is separately fixed in the rotating shaft of the receiving opening of cylinder and impeller, because of For the impeller feed hopper is driven by cylinder, so feeding coal is directly proportional with drum rotation speed, regulating rotation speed of drum can be accurately Regulate the boiler slag removal amount. The cooling air of cold slag machine (natural wind) enters cylindrical shell by the discharge chute, then from feed Exhaust outlet (27) on the device underframe is discharged to outer air duct. The transmission mechanism that drives the rotation of rolling comprises buncher (28), reductor (29), V belt (30), sprocket wheel (15) and (31), chain (32) and bearing support (33). Transfer Speed motor can be realized 1: 10 stepless speed regulation.

Embodiment:

Cold slag machine based on the utility model can be by the product of different disposal ability with different mounting condition design plurality of specifications.The cold slag machine of different size, the size of critical pieces such as its cylindrical shell, spiral tank and many spirals passage is different.Below wherein a kind of critical piece size and selection of specification are described as follows:

Cylinder type cold slag machine appearance and size as shown in Figure 4.The cylindrical shell of cold slag machine shown in this figure is the spiral seam welded still pipe of external diameter 720mm, long 6m, thickness of pipe wall 8mm.The high 40mm of spiral tank section, wide 250mm, spiral marine riser are the seamless steel pipe of φ 30, wall thickness 4mm; Round steel diameter 10mm; Flume wall is with thick 4mm general steel plate.Many spirals passage is formed for the helix tube of 6mm by two endwalls are thick, outer spiral tube caliber 76mm, and inner helix pipe caliber 63.5mm all adopts seamless steel pipe.

Claims

1, a kind of cylinder type cold slag machine is made up of cylinder, metering device, discharge chute, Inlet and outlet water device, transmission mechanism and base, it is characterized in that:

A, on cylindrical shell (1) outer wall of cylinder the fixing spiral tank that telescopic resilience, sealing structure are arranged of welding by the spiral marine riser (2) of opening long otch and flume wall (4) formation.

B, the many spirals passage (5) by 2-3 root uniform pitch helix tube combination is housed in the cylindrical shell of cylinder, its spiral external diameter is slightly less than cylinder internal diameter, cooperates for appropriate degree of tightness between many spiral ducts and the cylindrical shell.

C, at the cylinder exit side, cooling water inlet pipe (8) connects the spiral tank, outlet pipe (9) connects many spirals passage (5), at feed side, the spiral tank is connected by special pipe joint (7) and many spirals passage, the water inlet pipe of cylinder exit side and outlet pipe adopt the concentric tubes of different tube diameters, and its center line overlaps with cylinder axis.

2, according to the described cylinder type cold slag machine of claim 1, it is characterized in that be increasing spiral tank height, or for adopting tubule footpath spiral marine riser, in spiral marine riser bottom with elongated round steel (3) (or steel pipe) bed hedgehopping.