阅读说明：本技术 一种双分选式流化床冷渣器 (Double-separation type fluidized bed slag cooler ) 是由 卢啸风 杨惠晨 杨朋中 王迪 亢银虎 王泉海 李建波 于 2019-10-09 设计创作，主要内容包括：本发明涉及循环流化床锅炉辅机设备技术领域,且公开了一种双分选式流化床冷渣器,包括冷渣箱,所述冷渣箱的内壁上固定安装有保温层,所述保温层的内壁上固定安装有耐火层,所述冷渣箱的底部固定安装有固定桩,所述冷渣箱内腔底部的一侧固定安装有第一分隔墙,所述冷渣箱内腔底部的另一侧固定安装有第二分隔墙。相较于现有技术来说,本申请技术方案采用交错安装冷却板的冷却方式,通过在冷却板内部设置有上下回路的水冷排,煤渣从网筒内落下,与第一块冷却板上表面接触冷却,滑落到第二块冷却板的上表面冷却,可以多设置几层,冷却效果更好,煤渣与冷却板接触更充分,在较短的时间内冷却效果更好,提高了冷渣器的冷却效率。(The invention relates to the technical field of circulating fluidized bed boiler auxiliary equipment, and discloses a double-separation fluidized bed slag cooler which comprises a slag cooling box, wherein a heat-insulating layer is fixedly arranged on the inner wall of the slag cooling box, a fire-resistant layer is fixedly arranged on the inner wall of the heat-insulating layer, a fixing pile is fixedly arranged at the bottom of the slag cooling box, a first partition wall is fixedly arranged on one side of the bottom of an inner cavity of the slag cooling box, and a second partition wall is fixedly arranged on the other side of the bottom of the inner cavity of the slag cooling box. Compare in prior art, this application technical scheme adopts the cooling method of crisscross installation cooling plate, arrange through the water-cooling that is provided with upper and lower return circuit in the inside cooling plate, the cinder falls from the net section of thick bamboo, with the cooling of first cooling plate upper surface contact, the landing is to the upper surface cooling of second cooling plate, can set up several layers more, the cooling effect is better, the cinder is more abundant with the cooling plate contact, the cooling effect is better in short time, the cooling efficiency of cold sediment ware has been improved.)

1. The utility model provides a two separation formula fluidized bed cold sediment wares, includes cold sediment case (1), fixed mounting has heat preservation (2) on the inner wall of cold sediment case (1), fixed mounting has flame retardant coating (3) on the inner wall of heat preservation (2), the bottom fixed mounting of cold sediment case (1) has spud pile (4), one side fixed mounting of cold sediment case (1) inner chamber bottom has first divider wall (5), the opposite side fixed mounting of cold sediment case (1) inner chamber bottom has second divider wall (6), first divider wall (5) and second divider wall (6) divide into cooling bin (7), cooling bin (8), cooling bin (9) with the inner chamber of cold sediment case (1), the back of cold sediment case (1) just is located cooling bin (7) internal fixed mounting has into slag pipe (10), the bottom fixed mounting of cooling bin (7) has air distribution plate (11), the bottom of the cooling bin I (7) is fixedly provided with a main slag discharging pipe (12) by penetrating through the slag cooling box (1), the front of the main slag discharging pipe (12) is fixedly provided with a rotary slag discharging valve (13), one side of the main slag discharging pipe (12) is fixedly provided with an accident slag discharging pipe (14), the bottom of the cooling bin II (8) is fixedly provided with a purging air pipe (15), the bottom of the first partition wall (5) is provided with a circulating channel (16), the bottom of the inner cavity of the slag cooling box (1) is fixedly provided with an air chamber (17), the upper surface of the air chamber (17) is fixedly provided with an air cap (18), the inner cavity of the slag cooling box (1) is fixedly provided with a water cooling pipe bundle (19), one end of the water cooling pipe bundle (19) is fixedly provided with a cooling water inlet header (20), the other end of the water cooling pipe bundle (19) is fixedly provided with a cooling water outlet header (21, the method is characterized in that: the slag cooler is characterized in that a motor (23) is fixedly mounted above one side of the cold slag box (1), a mesh cylinder (24) is fixedly mounted on the upper portion of an inner cavity of the cold slag box (1) and is fixedly mounted with the motor (23), a rotating blade (25) is fixedly mounted inside the mesh cylinder (24), a slag passing pipe (31) is fixedly mounted on the upper portion of the other side of the cold slag box (1) and is coaxially fixed with the motor (23), a water cooling box (29) is fixedly mounted on one side of the upper surface of the water cooling box (29), a slag inlet pipe (10) is fixedly mounted in the middle of the upper surface of the water cooling box (29) and is positioned on one side of the slag inlet pipe (10), a water outlet pipe (32) is fixedly mounted at the bottom of one side of the water cooling box (29), and a rolling bearing (26) is fixedly mounted on the outer surface of the slag passing pipe (31), the cooling device is characterized in that a cooling plate (27) is fixedly arranged inside the first cooling bin (7), the second cooling bin (8) and the third cooling bin (9), and a water cooling bar (28) is fixedly arranged inside the cooling plate (27).

2. The double-separation type fluidized bed slag cooler according to claim 1, characterized in that: the mesh cylinder (24) has larger aperture from left to right, and the wind chamber (17) is arranged above the mesh cylinder (24).

3. The double-separation type fluidized bed slag cooler according to claim 1, characterized in that: one side of the cooling plate (27) is inclined downwards, and the two cooling plates (27) are arranged in a staggered mode.

4. The double-separation type fluidized bed slag cooler according to claim 1, characterized in that: the water cooling rows (28) are in a U-shaped plate shape, and the area of the plate shape is equivalent to the upper surface and the lower surface of the cooling plate (27).

5. The double-separation type fluidized bed slag cooler according to claim 1, characterized in that: and the cooling liquid in the water cooling discharge (28) enters the pipe from the lower part and exits from the upper part.

6. The double-separation type fluidized bed slag cooler according to claim 1, characterized in that: the bottom surface of the water cooling tank (29) is high at the left and low at the right, and the inclination angle is 20-30.

Technical Field

The invention relates to the technical field of auxiliary equipment of circulating fluidized bed boilers, in particular to a double-separation type fluidized bed slag cooler.

Background

The large fluidized bed is a clean coal combustion technology with the highest commercialization degree in the world, a 60-thousand supercritical circulating fluidized bed unit with independent intellectual property rights is successfully put into operation, a 66-thousand supercritical circulating fluidized bed unit with higher parameters is constructed, the operating condition of a slag cooler is directly related to the continuous safe and economic operation of a CFB boiler as a key auxiliary machine of the CFB boiler, the operating air volume is increased and the water cooling proportion is low due to the fact that the quality of coal entering the CFB boiler is worse and worse, the coarse slag share in bottom slag is increased, and a double-separation type fluidized bed slag cooler invention patent technology (patent number: 2010102973799) is developed by Chongqing university and can better solve a series of problems in the actual operation of a traditional fluidized bed slag cooler.

Referring to the attached drawing 1 of the specification, according to the existing double-separation fluidized bed slag cooler, the burned coal slag in the CFB boiler enters a first cooling bin 7 in a slag cooling box 1 through a slag inlet pipe 10, at the moment, an air chamber 17 is started, air is blown upwards through an air distribution plate 11, the small coal slag in the particles in the first cooling bin 7 is blown to the upper part in the slag cooling box 1 and drifts to the right, the coal slag with medium particles and a small part of small particle coal slag enter a second cooling bin 8, at the moment, a water cooling pipe bundle 19 arranged in the second cooling bin 8 cools the coal slag, another air chamber 17 arranged at the bottom of the second cooling bin 8 separates the coal slag with small air flow, the fallen medium particle coal slag enters the first cooling bin 7 through a circulating channel 16, the large coal slag in the first cooling bin 7 can be cooled again, and finally the fine coal slag entering a third cooling bin 9 is cooled by a small water cooling pipe bundle 19, the cooled coal cinder is discharged through the main cinder discharging pipe 12, the wind is discharged through the vent pipe 22, and when the main cinder discharging pipe 12 is blocked or damaged, the rotary cinder valve 13 is controlled to enable the accident cinder discharging pipe 14 to work for cinder discharging.

The existing double-separation type fluidized bed cold slag has the following defects:

firstly, the water-cooling tube bundle 19 is fixedly installed in the slag cooling box 1, a large gap is formed between the bent water-cooling tube bundles 19, fine slag is not fully contacted with the water-cooling tube bundle 19 in the falling process, the cooling time of the water-cooling tube bundle 19 for coal slag is long, and the working efficiency of the slag cooler is low.

Secondly, the bottom cooling of the inside of the cinder cooling box 1 is easy to condense, the problem of blockage is easily caused to each air chamber 17 and air distribution plate 11 which are fixedly installed at the bottom of the cinder cooling box 1, the generated air volume is reduced, the cooling is incomplete, even the air chamber 17 cannot work, the air is blown upwards, the cinder passing through the ventilation pipe 22 is more, the ventilation pipe 22 is easy to block, the damage of equipment is caused, and the service life of the cinder cooling device is shortened.

Thirdly, the high-temperature coal cinder entering from the cinder inlet pipe 10 directly enters the first cooling bin 7 and is air-cooled through the air chamber 17 at the bottom of the first cooling bin 7, however, the large coal cinder cannot be blown up, the high-temperature coal cinder is directly contacted with the fire-resistant layer 3 and can be bonded on the fire-resistant layer 3, the bottom of the first cooling bin 7 is blocked, and the service life of the fire-resistant layer 3 can be shortened in the long-time use process.

Disclosure of Invention

The invention provides a double-separation type fluidized bed slag cooler which has the advantages of better cooling effect, quicker screening and longer service life of equipment, and solves the problems of blockage of a ventilation pipe and an air chamber and longer cooling time.

The invention provides the following technical scheme: a double-separation fluidized bed slag cooler comprises a slag cooling box, wherein a heat preservation layer is fixedly mounted on the inner wall of the slag cooling box, a fire-resistant layer is fixedly mounted on the inner wall of the heat preservation layer, a fixing pile is fixedly mounted at the bottom of the slag cooling box, a first partition wall is fixedly mounted at one side of the bottom of an inner cavity of the slag cooling box, a second partition wall is fixedly mounted at the other side of the bottom of the inner cavity of the slag cooling box, the first partition wall and the second partition wall divide the inner cavity of the slag cooling box into a first cooling bin, a second cooling bin and a third cooling bin, a slag inlet pipe is fixedly mounted at the back of the slag cooling box and positioned in the first cooling bin, an air distribution plate is fixedly mounted at the bottom of the first cooling bin, a main slag discharge pipe is fixedly mounted at the bottom of the first cooling bin and penetrates through the slag cooling box, a rotary slag discharge valve is fixedly mounted at the front of the main slag discharge pipe, an accident slag discharge pipe is fixedly, the bottom fixed mounting of cooling bin two has the tuber pipe that sweeps, circulation channel has been seted up to the bottom of first partition wall, the bottom fixed mounting of cold sediment incasement chamber has the plenum, the last fixed surface of plenum installs the hood, the inner chamber fixed mounting of cold sediment case has water-cooling tube bank, the one end fixed mounting of water-cooling tube bank has cooling water inlet header, the other end fixed mounting of water-cooling tube bank has cooling water outlet header, the top fixed mounting of cold sediment case one side has the motor, the upper portion of cold sediment incasement chamber and with motor fixed mounting have the net section of thick bamboo, the inside fixed mounting of net section of thick bamboo has the rotary vane, the upper portion of cold sediment case opposite side and with the coaxial fixed mounting of motor have the sediment pipe, the one end of sediment pipe just is located the opposite side fixed mounting of cold sediment case has the water-cooling case, one side fixed mounting of water-cooling case upper surface has the sediment pipe, the utility model discloses a slag cooler, including water-cooling tank, inlet pipe, outlet pipe, cooling bin I, cooling bin II, cooling bin III, the inside fixed mounting of cooling bin I, cooling bin II, cooling bin III has the cooling plate, the inside fixed mounting of cooling plate has the water-cooling to arrange.

Preferably, the larger the aperture of the net cylinder from left to right, the wind chamber is arranged above the net cylinder.

Preferably, one side of the cooling plate is inclined downwards, and the two cooling plates are arranged in a staggered mode.

Preferably, the water cooling rows are in a U-shaped plate shape, and the plate-shaped area is equivalent to the upper surface and the lower surface of the cooling plate.

Preferably, the cooling liquid in the water cooling discharge pipe enters from the lower pipe and exits from the upper pipe.

Preferably, the bottom surface of the water cooling tank is higher at the left and lower at the right, and the inclination angle is 20-30.

The invention has the following beneficial effects:

compare in prior art, this application technical scheme adopts the cooling method of crisscross installation cooling plate, arrange through the water-cooling that is provided with upper and lower return circuit in the inside cooling plate, the cinder falls from the net section of thick bamboo, with the cooling of first cooling plate upper surface contact, the landing is to the upper surface cooling of second cooling plate, can set up several layers more, the cooling effect is better, the cinder is more abundant with the cooling plate contact, the cooling effect is better in short time, the cooling efficiency of cold sediment ware has been improved.

Compared with the prior art, the cooling mode that the air chamber arranged at the top blows downwards is adopted in the technical scheme, the coal cinder is conveyed in the cold cinder box through the net barrel movably arranged at the upper part of the inner cavity of the cold cinder box, the net holes are from left to right dense to sparse, the coal cinder is separated and is more completely separated, the coal cinder rolling in the net barrel is blown downwards under the influence of wind power, the coal cinder is scattered and cooled in a closed space between the first cooling plate and the second cooling plate under the influence of the wind power, the quantity of the fine coal cinder passing through the ventilation pipe is reduced, the blocking probability of the air chamber and the ventilation pipe is reduced, and the service life of the cold cinder device is prolonged.

Compared with the prior art, the technical scheme of the application adopts the method of pre-cooling in the water cooling tank, so that the high-temperature coal cinder is initially cooled to a certain temperature in the water cooling tank and then enters the cold cinder tank to perform the final cooling effect, the temperature of the coal cinder entering the cold cinder tank is relatively weak, and the service life of each part in the cold cinder tank is effectively protected.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic side view of the present invention;

fig. 5 is a perspective view of the cooling plate of the present invention.

In the figure: 1. a slag cooling box; 2. a heat-insulating layer; 3. a refractory layer; 4. fixing the pile; 5. a first partition wall; 6. a second dividing wall; 7. a first cooling bin; 8. a second cooling bin; 9. a third cooling bin; 10. a slag inlet pipe; 11. a wind distribution plate; 12. a main slag discharge pipe; 13. rotating a slag discharge valve; 14. an accident slag discharge pipe; 15. purging an air pipe; 16. a circulation channel; 17. an air chamber; 18. a hood; 19. a water-cooled tube bundle; 20. a cooling water inlet header; 21. a cooling water outlet header; 22. a vent pipe; 23. a motor; 24. a net drum; 25. rotating the leaf; 26. a rolling bearing; 27. a cooling plate; 28. water cooling and draining; 29. a water cooling tank; 30. a water inlet pipe; 31. a slag passing pipe; 32. and (5) discharging a water pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2-5, a double-separation fluidized bed slag cooler comprises a slag cooling box 1, a heat insulating layer 2 is fixedly arranged on the inner wall of the slag cooling box 1, a fire-resistant layer 3 is fixedly arranged on the inner wall of the heat insulating layer 2, a fixing pile 4 is fixedly arranged at the bottom of the slag cooling box 1, a first partition wall 5 is fixedly arranged at one side of the bottom of the inner cavity of the slag cooling box 1, a second partition wall 6 is fixedly arranged at the other side of the bottom of the inner cavity of the slag cooling box 1, the first partition wall 5 and the second partition wall 6 divide the inner cavity of the slag cooling box 1 into a first cooling bin 7, a second cooling bin 8 and a third cooling bin 9, a slag inlet pipe 10 is fixedly arranged at the back of the slag cooling box 1 and positioned in the first cooling bin 7, an air distribution plate 11 is fixedly arranged at the bottom of the first cooling bin 7 and fixedly arranged with a main slag discharge pipe 12 penetrating through the slag cooling box 1, and a rotary slag discharge valve 13 is fixedly arranged at the, an accident slag discharging pipe 14 is fixedly arranged on one side of a main slag discharging pipe 12, a purging air pipe 15 is fixedly arranged on the bottom of a cooling bin II 8, a circulating channel 16 is arranged at the bottom of a first partition wall 5, an air chamber 17 is fixedly arranged on the bottom of an inner chamber of a slag cooling box 1, an air cap 18 is fixedly arranged on the upper surface of the air chamber 17, a water cooling pipe bundle 19 is fixedly arranged in the inner chamber of the slag cooling box 1, a cooling water inlet header 20 is fixedly arranged at one end of the water cooling pipe bundle 19, a cooling water outlet header 21 is fixedly arranged at the other end of the water cooling pipe bundle 19, a motor 23 is fixedly arranged above one side of the slag cooling box 1, a mesh cylinder 24 is fixedly arranged on the upper portion of the inner chamber of the slag cooling box 1 and is fixed with the motor 23, a rotating blade 25 is fixedly arranged in the mesh cylinder 24, a slag passing pipe 31 is fixedly arranged on the upper portion of the other side of the slag cooling box 1 and is coaxially fixed with the motor, one side fixed mounting of water-cooling tank 29 upper surface has into sediment pipe 10, one side fixed mounting that the middle part of water-cooling tank 29 upper surface just is located into sediment pipe 10 has oral siphon 30, the bottom fixed mounting of water-cooling tank 29 one side has outlet pipe 32, the outer fixed mounting who crosses sediment pipe 31 has antifriction bearing 26, and the inside fixed mounting of cooling bin 7, cooling bin two 8, cooling bin three 9 has cooling plate 27, and the inside fixed mounting of cooling plate 27 has water-cooling row 28.

The mesh cylinder 24 has larger aperture from left to right, the air chamber 17 is arranged above the mesh cylinder 24, the mesh cylinder 24 is provided with the specification of the aperture, coal cinder of different specifications is sorted under the action of self gravity, centrifugal force and wind force, the less and less wind force required by the coal cinder is smaller, the problems that the wind force required by blowing from bottom to top is larger, the air chamber 17 arranged below is easy to block are solved, and the service life of the slag cooler in the long-time use process is prolonged.

One side of each cooling plate 27 is inclined downwards, the two cooling plates 27 are installed in a staggered mode, a space with one side being closed is formed among the cooling plates 27 through the determination of the installation method of the cooling plates 27, coal cinder entering in a sliding mode is blocked by the first layer of cooling plates 27 and cannot fly to the upper portion of the inner cavity of the cold cinder box 1 again under the influence of wind, the problem that the air chamber 17 is blocked due to the fact that the coal cinder flies disorderly is solved, and the service life of the air chamber 17 is prolonged.

Wherein, water-cooling row 28 is U-shaped plate form, and the plate area is equivalent with the upper and lower surface of cooling plate 27, arranges 28 size cooperation through cooling plate 27 and water-cooling, has guaranteed that all positions of cooling surface can both be refrigerated on cooling plate 27, carries out abundant cooling to the cinder that falls on cooling plate 27 upper surface, has solved the cooling tube and has cooled down the cinder inadequately, the problem of required time overlength, has promoted the cooling efficiency of cold sediment ware to the cinder.

Wherein, the coolant liquid low tube in the water-cooling row 28 is advanced, goes up the tube and goes out, through the flow direction of coolant liquid, the upper surface of cooling plate 27 is main cooling surface, and it is long when having guaranteed the cooling of coolant liquid to cooling plate 27 surface by lower surface to upper surface, makes the cooling of cooling plate 27 upper surface more abundant to guarantee the cooling effect of cooling plate 27 upper surface to the cinder, solved the from the top and flowed in, the insufficient problem of coolant liquid utilization has promoted the utilization efficiency to the coolant liquid.

The bottom surface of the water cooling tank 29 is high at the left and low at the right, the inclination angle is 20-30, and the inclined lower bottom surface of the water cooling tank 29 enables high-temperature coal cinder to enter the water cooling tank 29 for primary cooling and then to slide into the cinder passing pipe 31, so that the problems that the high-temperature coal cinder with the too small inclination angle is easy to accumulate, the too large sliding speed is high, the cooling time is short, and the temperature is still high are solved, and the coal cinder is cooled to the proper temperature and slides into the cinder passing pipe 31 to enter the cinder cooling tank 1.

The working principle is that the cinder combusted in the CFB boiler enters the water cooling tank 29 through the cinder inlet pipe 10, the high-temperature cinder in the water cooling tank 29 is pre-cooled by cold water injected from the water inlet pipe 30, hot water after heat transfer is discharged from the water outlet pipe 32, the pre-cooled cinder enters the mesh cylinder 24 through the cinder passing pipe 31, at the moment, the motor 23 is started to drive the mesh cylinder 24 to rotate, the cinder entering the mesh cylinder 24 is rolled and transmitted to the right through the spirally arranged rotating blades 25, air in the air chamber 17 is blown to the rolled cinder through the air cap 18, the cinder passes through holes with different sizes formed in the mesh cylinder 24 and falls down at different positions, the falling cinder passes through a plurality of layers of inclined cooling plates 27 to be cooled, cooling liquid in the cooling plates 27 continuously flows to ensure that the temperature of the contact surface with the cinder is lower, the cinder is rolled by the air and splashed between the first cooling plate 27 and the second cooling plate 27, and the cooling effect is better by arranging a plurality of layers of cooling plates 27, the cooled cinder is discharged through the main cinder discharging pipe 12, and when the main cinder discharging pipe 12 is damaged, the rotary cinder valve 13 is rotated to enable the accident cinder discharging pipe 14 to work, and the cinder in the cold cinder box 1 is discharged.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.