CN2183839Y

CN2183839Y - Inclined fluid-bed heater

Info

Publication number: CN2183839Y
Application number: CN 94225747
Authority: CN
Inventors: 石光玉; 郭来平; 张建军
Original assignee: Jinan Casting And Forging Machines Inst Ministry Of Machine Building
Current assignee: Jinan Casting And Forging Machines Inst Ministry Of Machine Building
Priority date: 1994-02-06
Filing date: 1994-02-06
Publication date: 1994-11-30
Anticipated expiration: 2004-02-06

Abstract

The utility model relates to a heating device of sodium silicate sand regenerating pre-treatment apparatus, which comprises a box body 13 which is provided with an air inlet 4, an air outlet 11, a sand inlet 1 and a sand outlet 9. The utility model has the essential technical proposal that a heating pipe 7 and an inclined fluidized-bed 6 are fixedly arranged in the box body 13, the fluidized-bed 6 of the box body can be fixedly arranged and can also be arranged in the box body 13 through a spring 8, and a vibrating exciton 5 needs arranging on the fluidized-bed 6 at this time. The utility model has the advantages that the device heats the used sand uniformly, and prevents the local sintering of the sand mass and the jam of the sand layers.

Description

Inclined fluid-bed heater

The utility model relates to a kind of regenerating water-glass old sand pretreatment unit.The heater in the regenerating water-glass old sand preprocessing process specifically.

The inventor finds that the waterglass inert coating when broken ball milling is regenerated, because of overflowing of constitution water, makes the contained moisture content of old sand bring up to more than 2% in the process of the regenerating water-glass old sand complexes of implementing oneself to invent (patent No. ZL912215895).Inherent characteristic in view of the water-glass sand inert coating, if add this part moisture content of heat abstraction with naked light, it is inhomogeneous then can to cause sand grains to be heated, constitution water can not volatilize when the temperature of sand grains of being heated was lower than 100 ℃, when the temperature of sand grains of being heated surpasses 300 ℃, waterglass inert coating crackle on the sand grains regroups, and causes the more difficult and sand grains disengaging of inert coating.When adopting existing horizontal fixed bed fluidisation heater to heat old sand, because the moisture content height of old sand contains higher Na in the old sand simultaneously ₂The inert coating of O easily causes sand inlet and bed top sand group local sintering, seriously influences evenly flowing of casting bed, causes obstruction easily.

The purpose of this utility model is for the used sodium silicate sand that contains higher moisture content after the elementary regeneration of broken ball milling is handled effectively again, make it used sodium silicate sand and reach regeneration effectively fully, and a kind of moisture content of can removing effectively that provides can make the old sand homogeneous heating again and solve the inclination floating bed fluidisation heater that casting bed blocks.

The utility model is achieved in that its body is a casing that has air inlet, air outlet, sand inlet, sand export, in this casing heating tube is installed, so that the old sand that enters in this casing is heated.Bottom in casing is equipped with the fluid bed of an inclination, after the Compressed Gas that air inlet is entered passes through this fluid bed, makes the old sand that enters in the casing form suspended state, so that old sand is heated equably.It is to prevent that old sand from piling up on fluid bed and sand group local sintering that fluid bed tilts to install.In order to make sand grains leave fluid bed as early as possible, fluid bed is installed in the casing by spring, and on this fluid bed, the exciton that shakes is installed, make fluid bed produce vibration, to quicken the flowing velocity of old sand grain.

Because the utility model is with the fluidisation heating in casing of old sand grain, makes the heating of sand grains more even.Fluid bed in the casing tilts to install, can be with making the old sand grain that drops on the fluid bed, and under the effect of dead weight, to the landing of sand export direction, it can prevent effectively because sand grains is piled up the local sintering that is produced on the sulfuration bed.Make fluid bed be in quick condition in addition, and on it the installation exciton that shakes, it can quicken sand grains on the fluid bed to the sand export landing, it not only can make casting bed evenly flow, and right to prevent from effectively to block and to the sintering of sand group.

Fig. 1 is a structure principle chart of the present utility model.

Below in conjunction with accompanying drawing the utility model is described in detail.

Casing 13 by shape, metallic plate is fixedly connected constitutes, and is provided with sand inlet 1, sand export 9, air inlet 4 and air outlet 11 on casing 13.Word is equipped with heating tube 7 in casing 13, and heating tube 7 can be an electric heating tube, also can be the heater of steam-heating pipe or other kinds, preferably uses electric heating tube, so that the control heating-up temperature.The bottom that fluid bed 6 tilts to be installed in the casing 13, promptly, low near that end of sand export 9 near that end height of sand inlet 1.Fluid bed 6 can be fixedly mounted in the casing 13, also can be installed in the casing 13 by spring 8, makes fluid bed 6 be in quick condition.If fluid bed 6 is installed in the casing 13 by spring 8, on fluid bed 6, be installed with the exciton 5 that shakes, the exciting mode of the exciton 5 that shakes can be the vertical direction exciting, also can be the horizontal direction exciting, preferably the horizontal direction exciting.The exciton 5 that shakes can be the pneumatic exciton that shakes, and the air inlet of this pneumatic exciton that shakes is connected with source of the gas with air operated reversing valve 3 through air inlet pipe.The exciton 5 that shakes also can be vibrating motor or other exciting device.For the ease of the heating-up temperature in the control casing 13, temperature controller 2 of fixed installation in casing 13 can be controlled at the temperature in the casing 13 within the range of set temperature by temperature controller 12.Advance sand speed in order to control, at level-sensing device 2 of sand inlet 1 place of casing 13 fixed installation, this level-sensing device horizontal level-sensing device preferably the time.Another effect that level-sensing device 2 is installed is: when advancing the sand amount too much or when blocking the layer of sand height and being up to the standard level-sensing device 2, level-sensing device 2 sends signal makes the exciton 5 that shakes drive fluid bed 6 generation vibrations, to quicken the flowing velocity of old sand, prevent the obstruction that partially sinters and prevent layer of sand of sand group effectively, exciton 5 is the pneumatic excitons that shake if shake, then the signal that sends of level-sensing device 2 makes air operated reversing valve 3 commutations, Compressed Gas starts the level be installed on the fluid bed 6 exciton 5 that shakes, make inclination fluid bed 6 under the effect of spring, generation is along the dither of bed surface, quicken flowing of casting bed fluidisation, make the layer of sand homogeneous heating, prevent obstructing problem simultaneously.For the sand grains that prevents to handle flows out from air outlet 11 with the lingering remnants of past customs, be installed with a filter screen 10 at air outlet 11 places.Discharge from sand export 9 by the sand grains that this device is handled, enter old sand and handle road equipment down.The lingering remnants of past customs enters atmosphere after entering the cleaner dedusting by air outlet 11.

Claims

1, inclination floating bed fluidisation heater, it comprises the casing (13) that has air inlet (4), air outlet (11), sand inlet (1), sand export (9), it is characterized in that: be installed with heating tube (7) in casing (13), the bottom in casing (13) is equipped with the fluid bed (6) of an inclination.

2, inclination floating bed fluidisation heater according to claim 1 is characterized in that: the spring (8) of supporting fluid bed (6) is installed between casing (13) and fluid bed (6), is installed with the exciton that shakes (5) on fluid bed (6).

3, inclination floating bed fluidisation heater according to claim 2, it is characterized in that: the exciton that shakes (5) that is fixedly mounted on the fluid bed (6) is the pneumatic exciton that shakes, and the air inlet of the exciton that shakes (5) is connected with source of the gas with air operated reversing valve (3) through air inlet pipe.

4, according to claim 1 or 2 or 3 described inclination floating bed fluidisation heaters, it is characterized in that: in casing (13), be installed with temperature controller (12).

5, according to claim 1 or 2 or 3 described inclination floating bed fluidisation heaters, it is characterized in that: on the casing (13) that sand inlet (1) is located, be installed with level-sensing device (2).

6, inclination floating bed fluidisation heater according to claim 4 is characterized in that: be installed with level-sensing device (2) on the casing (13) that sand inlet (1) is located.

7, according to claim 1 or 2 or 3 described inclination floating bed fluidisation heaters, it is characterized in that: locate to be installed with screen pack at air outlet (11).