Bed material adding mechanism of circulating fluidized bed

Abstract

The utility model discloses a bed material adding mechanism of a circulating fluidized bed, which relates to the technical field of fluidized bed gasification furnaces and comprises a rack unit, a discharging unit, a gasification furnace, a crushing unit and a conveying unit, the crushing unit comprises two first crushing rollers movably arranged in the discharging unit and two second crushing rollers movably arranged in the lower portion of the discharging unit and used for secondary crushing. The material conveying unit comprises a discharging pipe fixedly connected to the center of the bottom of the discharging unit and a material conveying inclined cylinder fixedly connected to the bottom end of the discharging pipe and used for conveying bed materials. According to the bed material adding mechanism of the circulating fluidized bed, the size of a bed material can be guaranteed through double crushing, blockage caused by overlarge bed material particles in the conveying process is avoided, the crushed bed material is more convenient for a gasification furnace to use, the bed material is conveyed in a spiral pushing mode, blockage in the bed material conveying and adding process can be avoided, and the production efficiency is improved. And the bed material conveying efficiency can be improved, and good practicability is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluidized bed vaporization furnace technical field, especially relates to a circulating fluidized bed bed material adding mechanism. BACKGROUND

[0002] Circulating fluidized bed boiler is a kind of high-efficiency low-pollution clean combustion technology that has developed rapidly in recent years, and has been widely used in power station boiler, industrial boiler and waste disposal and utilization etc. Biomass circulating fluidized bed gasification furnace is a kind of device that can use poor-quality fuel, mainly composed of feeding device, fluidized bed, cyclone separator, return valve etc. Before the start of circulating fluidized bed gasification furnace, appropriate bed material needs to be added, and its main role is to establish bed pressure balance in the gasification furnace in the initial stage of starting, and to establish material circulation and heat transfer in the stage of ignition start and continuous operation. When it is necessary to use non-combustible material to control the temperature of gasification furnace hearth, bed material needs to be supplemented into the gasification furnace, so that bed material adding mechanism needs to be used.

[0003] The existing bed material adding mechanism does not have the function of crushing, and the bed material is too large to easily cause blockage in the process of conveying, which affects the efficiency of bed material adding, therefore, it is necessary to provide a circulating fluidized bed bed material adding mechanism. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a circulating fluidized bed bed material adding mechanism, which can effectively solve the problem that the existing bed material adding mechanism in the background art does not have the function of crushing, and the bed material is too large to easily cause blockage in the process of conveying, which affects the efficiency of bed material adding.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a circulating fluidized bed bed material adding mechanism, which comprises a rack unit, a discharging unit embedded in the top end of the rack unit, and a vaporization furnace arranged on one side of the rack unit, further comprising a crushing unit arranged in the discharging unit and a conveying unit arranged in the rack unit.

[0006] The crushing unit comprises two first crushing rollers movably arranged in the discharging unit, and two second crushing rollers movably arranged below the discharging unit.

[0007] The conveying unit comprises a discharge pipe fixedly connected to the center of the bottom of the discharging unit, and a conveying inclined cylinder for conveying bed material fixedly connected to the bottom end of the discharge pipe.

[0008] Preferably, the rack unit comprises a support rack, two vertical support columns fixedly connected to the inner bottom wall of the support rack, and a supporting ring fixedly connected to the top end of each vertical support column.

[0009] Preferably, the feeding unit comprises a feeding bin embedded in the top end of the support frame, a discharging cavity opened in the top of the feeding bin, and two crushing cavities opened in the feeding bin.

[0010] Preferably, the crushing unit further comprises a first motor fixedly connected to the rear wall surface of the support frame, first gears fixedly connected to one end of the two first crushing rollers respectively, second gears fixedly connected to one end of the two second crushing rollers respectively, pulleys fixedly connected to one end of one first gear and one second gear respectively, and a transmission belt sleeved between the two pulleys.

[0011] Preferably, the feeding unit further comprises a second motor fixedly connected to one end of the feeding inclined cylinder, a discharging port opened in the inclined surface of the feeding inclined cylinder, a transmission shaft fixedly connected to the driving end of the second motor, and helical blades fixedly connected to the outer surface of the transmission shaft.

[0012] Preferably, the driving end of the first motor is fixedly connected to one side of the other first gear, the two first gears are in meshing connection, the two second gears are in meshing connection, and the density of the second crushing roller is smaller than that of the first crushing roller.

[0013] Preferably, the feeding inclined cylinder is installed on the top of the two supporting rings, one end of the feeding inclined cylinder extends into the interior of the vaporization furnace, the transmission shaft is movably arranged in the interior of the feeding inclined cylinder, and the discharging pipe is in communication with the feeding inclined cylinder through the discharging port.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] Firstly, the bed material is poured into the interior of the discharging cavity of the feeding bin, and the bed material falls into the interior of the upper crushing cavity, at this time, the first motor is started, the first motor drives one first gear to rotate, the rotation of the first gear drives the other first gear to rotate through meshing, the rotation of the other first gear drives one second gear to rotate through the transmission connection of the two pulleys and the transmission belt, the rotation of the second gear drives the other second gear to rotate through meshing, thereby synchronously rotating the two first crushing rollers and the two second crushing rollers, so that the bed material falls through the crushing of the two first crushing rollers and the crushing of the two second crushing rollers, the size of the bed material is guaranteed through double crushing, the conveying process is prevented from being blocked due to the too large bed material particles, and the crushed bed material is more convenient for the use of the vaporization furnace.

[0016] Secondly, in the utility model, the bed material crushed twice passes through the blanking pipe and enters the inside of the material conveying inclined cylinder through the blanking opening, at this time, the second motor is started, the second motor drives the transmission shaft to rotate at high speed in the inside of the material conveying inclined cylinder, the high speed rotation of the transmission shaft drives the spiral blade to rotate at high speed, the spiral blade rotation pushes the bed material falling into the inside of the material conveying inclined cylinder to one end, and the bed material is added and sent into the inside of the gasification furnace, the structure conveys the bed material in the spiral pushing mode, can avoid the blockage in the bed material conveying and adding process, can improve the conveying efficiency of the bed material, and has good practicality. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view internal section structure schematic view of the utility model;

[0018] Figure 2 It is a crushing unit part connection structure schematic view of the utility model;

[0019] Figure 3 It is the utility model Figure 1 A place amplification structure schematic view in the utility model;

[0020] Figure 4 It is the utility model Figure 1 B place amplification structure schematic view in the utility model.

[0021] In the drawing:

[0022] 100, gantry unit; 101, support gantry; 102, vertical support column; 103, supporting ring;

[0023] 200, discharging unit; 201, discharging bin; 202, blanking cavity; 203, crushing cavity;

[0024] 300, gasification furnace;

[0025] 400, crushing unit; 401, first motor; 402, first gear; 403, pulley; 404, transmission belt; 405, second gear; 406, first crushing roller; 407, second crushing roller;

[0026] 500, material conveying unit; 501, material conveying inclined cylinder; 502, second motor; 503, blanking pipe; 504, blanking opening; 505, transmission shaft; 506, spiral blade. DETAILED DESCRIPTION

[0027] Example 1

[0028] Please refer to Figure 1 — Figure 4As shown, the utility model is a kind of circulating fluidized bed bed material adding mechanism, including gantry unit 100, embedding in the top inside of gantry unit 100 discharge unit 200 and being arranged in the one side of gantry unit 100 vaporization furnace 300, still including the crushing unit 400 of being arranged in the inside of discharge unit 200 and the material conveying unit 500 of being arranged in the inside of gantry unit 100;

[0029] Material conveying unit 500 includes the downcomer 503 of being fixedly connected at the bottom center of discharge unit 200, and the material conveying inclined cylinder 501 for bed material conveying of being fixedly connected in the bottom end of downcomer 503.

[0030] Gantry unit 100 includes support gantry 101, two vertical support columns 102 of being fixedly connected in the inner bottom wall of support gantry 101, and the supporting ring 103 of being fixedly connected in the top end of two vertical support columns 102 respectively.

[0031] Discharge unit 200 includes embedding in the top inside of support gantry 101 discharge bin 201, the downcomer 202 of being opened in the top of discharge bin 201, and two crushing cavities 203 of being opened in the inside of discharge bin 201.

[0032] As Figure 1 — Figure 3 As shown, crushing unit 400 includes two first crushing rollers 406 movably arranged in the inside of discharge unit 200, and two second crushing rollers 407 of secondary crushing movably arranged in the inside below discharge unit 200, and crushing unit 400 further includes first motor 401 of being fixedly connected in the back wall of support gantry 101, first gear 402 of being fixedly connected in one end of two first crushing rollers 406 respectively, second gear 405 of being fixedly connected in one end of two second crushing rollers 407 respectively, belt wheel 403 of being fixedly connected in one end of one first gear 402 and one second gear 405 respectively, and transmission belt 404 of being sleeved between two belt wheels 403, the driving end of first motor 401 is fixedly connected with the side of another first gear 402, two first gears 402 are engagedly connected, two second gears 405 are engagedly connected, and the density of second crushing roller 407 is less than the density of first crushing roller 406.

[0033] Working principle: first, the bed material is poured into the inside of the discharging cavity 202 of the discharging bin 201, and the bed material falls into the inside of the upper crushing cavity 203, at this time, the first motor 401 is started, the first motor 401 drives a first gear 402 to rotate, the rotation of the first gear 402 drives another first gear 402 to rotate through meshing, the rotation of the other first gear 402 drives a second gear 405 to rotate through the transmission connection of the two pulleys 403 and the transmission belt 404, the rotation of the second gear 405 drives another second gear 405 to rotate through meshing, so that the two first crushing rollers 406 and the two second crushing rollers 407 rotate synchronously, so that the bed material is crushed by the two first crushing rollers 406 and falls to be crushed by the two second crushing rollers 407, and through double crushing, the size of the bed material can be guaranteed, the conveying process is prevented from being blocked due to the too large bed material particles, and the crushed bed material is more convenient for the use of the vaporization furnace 300.

[0034] Embodiment 2

[0035] Please refer to Figure 1 — Figure 4 The utility model discloses a circulating fluidized bed bed material adding mechanism, including gantry unit 100, the discharging unit 200 of embedding in the inside of gantry unit 100 top, and set up in the vaporization furnace 300 of gantry unit 100 one side, still including the crushing unit 400 of setting up in the inside of discharging unit 200 and the feeding unit 500 of setting up in the inside of gantry unit 100,

[0036] The crushing unit 400 includes two first crushing rollers 406 movably arranged in the inside of the discharging unit 200, and two second crushing rollers 407 movably arranged in the inside below the discharging unit 200.

[0037] The gantry unit 100 includes a support gantry 101, two vertical support columns 102 fixedly connected to the inner bottom wall of the support gantry 101, and a supporting ring 103 fixedly connected to the top of each vertical support column 102.

[0038] The discharging unit 200 includes a discharging bin 201 embedded in the inside of the top of the support gantry 101, a discharging cavity 202 opened in the top of the discharging bin 201, and two crushing cavities 203 opened in the inside of the discharging bin 201.

[0039] As Figure 1 and Figure 4As shown, the feeding unit 500 comprises a feeding pipe 503 fixedly connected at the bottom center of the feeding unit 200, and a feeding inclined cylinder 501 for bed material conveying fixedly connected at the bottom end of the feeding pipe 503, the feeding unit 500 further comprises a second motor 502 fixedly connected at one end of the feeding inclined cylinder 501, a discharging opening 504 opened on the inclined surface of the feeding inclined cylinder 501, a transmission shaft 505 fixedly connected at the driving end of the second motor 502, and helical blades 506 fixedly connected on the outer surface of the transmission shaft 505, the feeding inclined cylinder 501 is installed on the top of the two supporting rings 103, one end of the feeding inclined cylinder 501 extends to the inside of the gasification furnace 300, the transmission shaft 505 is movably arranged in the inside of the feeding inclined cylinder 501, and the feeding pipe 503 is in communication with the feeding inclined cylinder 501 through the discharging opening 504.

[0040] Working principle: the secondarily crushed bed material enters the inside of the feeding inclined cylinder 501 through the discharging opening 504 in the feeding pipe 503, at this time, the second motor 502 is started, the second motor 502 drives the transmission shaft 505 to rotate at high speed in the inside of the feeding inclined cylinder 501, the high-speed rotation of the transmission shaft 505 drives the helical blades 506 to rotate at high speed, the rotation of the helical blades 506 pushes the bed material falling into the inside of the feeding inclined cylinder 501 to one end in a spiral manner, and the bed material is added and fed into the inside of the gasification furnace 300, the structure conveys the bed material in a spiral pushing manner, can avoid the blockage in the process of conveying and adding the bed material, can improve the conveying efficiency of the bed material, and has good practicability.

Claims

1. A circulating fluidized bed bed material adding mechanism, comprising a rack unit (100), a discharging unit (200) embedded in the inside of the top end of the rack unit (100), and a vaporization furnace (300) arranged at one side of the rack unit (100), characterized in that, It also includes a crushing unit (400) arranged inside the feeding unit (200) and a feeding unit (500) arranged inside the rack unit (100); The crushing unit (400) includes two first crushing rollers (406) movably arranged inside the feeding unit (200), and two second crushing rollers (407) movably arranged inside the feeding unit (200) below. The feeding unit (500) includes a discharge pipe (503) fixedly connected at the bottom center of the feeding unit (200), and a feeding inclined cylinder (501) for bed material conveying fixedly connected at the bottom end of the discharge pipe (503).

2. A circulating fluid bed bed material addition mechanism according to claim 1, characterized in that: The rack unit (100) includes a support rack (101), two vertical supports (102) fixedly connected to the inner bottom wall of the support rack (101), and a supporting ring (103) fixedly connected to the top end of each vertical support (102).

3. A circulating fluid bed bed material addition mechanism according to claim 2, characterised in that: The feeding unit (200) includes a feeding bin (201) embedded inside the top end of the support rack (101), a discharge cavity (202) opened at the top of the feeding bin (201), and two crushing cavities (203) opened inside the feeding bin (201).

4. A circulating fluid bed bed material addition mechanism according to claim 3, characterised in that: The crushing unit (400) further includes a first motor (401) fixedly connected to the rear wall of the support rack (101), a first gear (402) fixedly connected to one end of each first crushing roller (406), a second gear (405) fixedly connected to one end of each second crushing roller (407), a belt pulley (403) fixedly connected to one end of each first gear (402) and second gear (405), and a transmission belt (404) sleeved between the two belt pulleys (403).

5. A circulating fluid bed bed material addition mechanism according to claim 4, characterised in that: The feeding unit (500) further includes a second motor (502) fixedly connected to one end of the feeding inclined cylinder (501), a discharge opening (504) opened on the inclined surface of the feeding inclined cylinder (501), a transmission shaft (505) fixedly connected to the driving end of the second motor (502), and a helical blade (506) fixedly connected to the outer surface of the transmission shaft (505).

6. A circulating fluid bed bed material addition mechanism according to claim 5, wherein: The driving end of the first motor (401) is fixedly connected to one side of the other first gear (402), the two first gears (402) are in meshing connection, the two second gears (405) are in meshing connection, and the density of the second crushing roller (407) is smaller than that of the first crushing roller (406).

7. A circulating fluid bed bed material addition mechanism according to claim 6, characterised in that: The feeding inclined cylinder (501) is mounted on the top of the two supporting rings (103), one end of the feeding inclined cylinder (501) extends into the interior of the gasification furnace (300), the transmission shaft (505) is movably arranged inside the feeding inclined cylinder (501), and the discharge pipe (503) is in communication with the feeding inclined cylinder (501) through the discharge opening (504).

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