CN2517483Y

CN2517483Y - Fluid bed

Info

Publication number: CN2517483Y
Application number: CN 01257311
Authority: CN
Inventors: 欧亚非; 潘天典; 杨志平
Original assignee: Zhuzhou Cemented Carbide Group Co Ltd
Current assignee: Zhuzhou Cemented Carbide Group Co Ltd
Priority date: 2001-11-09
Filing date: 2001-11-09
Publication date: 2002-10-23
Anticipated expiration: 2011-11-09

Abstract

The utility model relates to a fluidized bed, comprising a furnace mantle, a furnace chamber, a grid plate, a gas distributing cone, a heating unit provided with an installation area, an inlet pipe and a discharge pipe, wherein the inlet pipe is connected with the bottom of the gas distributing cone; the bottom of the furnace chamber is an internal conical surface for closely matching an external conical surface of the gas distributing cone; the gas distributing cone is arranged on the internal conical surface; the discharge pipe is arranged at the lower parts of the furnace chamber and the gas distributing cone and is connected with the furnace chamber. The utility model can be broadly used in the fields of chemical smelting, catalyzing, compositing and drying.

Description

A kind of fluid bed

Technical field

The utility model relates to a kind of fluid bed.

Background technology

Fluidization is that a kind of fine-particle solid that makes is by contacting the operation that is transformed into the similar liquids state with gas or liquid.Fluid bed is to interact between a kind of reinforcement gas (or liquid) and the solid and make solid particle produce the bed of similar liquids proterties, it has can make solid particle mix rapidly, can make and temperature state such as be in the whole reactor, heat transfer between solid particle and the gas and mass transfer rate be than other ways of contact advantages of higher more, is applied at industrial circles such as chemical industry smelting, catalysis, synthetic and dryings.Discharging is a requisite step in the fluidized bed process, and it is concerning that material enters next flow process or obtains final products.The structure of solid device for discharging depends primarily on the requirement of fluidizing gas sealing in the reaction and solids treatment situation subsequently.Adopt from the distribution grid top of the existing baiting structure of fluid bed installed overflow pipe more both at home and abroad, or is directly installed on these the two kinds of forms of overflow pipe on the distribution grid.

Adopt the fluid bed of above-mentioned two kinds of baiting structures, because overflow pipe need be installed in bed of material reaction zone, fluidized state is certainly led to some influences, simultaneously for preventing to react that time material powder enters overflow pipe, solve the elevated-temperature seal problem, need to adopt other devices to carry out supporting control, make the structure and the complicated operation thereof of fluid bed.There is the incomplete problem of blanking in addition.

Summary of the invention

The purpose of this utility model provides a kind of simple in structure, can the fluidized state of reaction zone not exerted an influence in when reaction, again can be after reaction the fluid bed of complete unloading.For this reason, fluid bed of the present utility model, form by furnace shell (4), burner hearth (3), distribution grid (4), cloth gas coning (5), heater and installing zone (2) thereof, air inlet pipe (8), discharge duct (7), air inlet pipe (8) is connected with cloth gas coning (5) bottom, burner hearth (3) bottom is an inner conical surface, can closely suit with cloth gas coning (5) male cone (strobilus masculinus), and cloth gas coning (5) is held on the inner conical surface, discharge duct (7) is positioned at the bottom of burner hearth (3) and cloth gas coning (5), and links to each other with burner hearth (3).

This fluidized-bed structure is simple, because the cloth gas coning is held on the burner hearth bottom inner conical surface and with cloth gas coning male cone (strobilus masculinus) and closely suits, does not have overflow pipe at reaction zone, so can produce good insulation and sealing effectiveness when reaction, also can not influence fluidized state.After reaction is finished, the gas distribution vertex of a cone is risen, the burner hearth bottom inner conical surface separates with cloth gas coning male cone (strobilus masculinus), and reaction zone material powder flows into discharge duct from two conical surface cracks, reach discharging effect completely.

Description of drawings

Fig. 1 is the cutaway view of known fluid bed.

Fig. 2 is the cutaway view of another kind of known fluid bed.

Fig. 3 is the cutaway view of the utility model fluid bed.

Known fluid bed illustrated in figures 1 and 2 adopts respectively from the distribution grid top and overflow pipe is installed and overflow pipe is directly installed on dual mode on the distribution grid.Because overflow pipe stretches into reaction zone, the fluidized state during to reaction exerts an influence.Simultaneously, for preventing to expect that powder enters overflow pipe, need to install in addition sealing device, make the structure and the complicated operation thereof of fluid bed.During discharging, the powder of overflow mouth of pipe below is difficult for drawing off, and has reduced the rate of recovery and the quality of product.

Among Fig. 3: 1. furnace shell 2. heaters and installing zone 3. burner hearths 4. distribution grids 5. cloth gas conings 6. thereof individual member 7. discharge ducts 8. air inlet pipe 9. bolts that can freely load and unload.

The specific embodiment

Figure 3 shows that the upwards state of jack-up of the utility model fluid bed cloth gas coning 5, it is made up of furnace shell 1, burner hearth 3, distribution grid 4, cloth gas coning 5, heater and installing zone 2 thereof, air inlet pipe 8, discharge duct 7, and air inlet pipe 8 is connected with cloth gas coning 5 bottoms.Gas enters in the cloth gas coning 5 by air inlet pipe 8 during reaction, enters in the burner hearth 3 through distribution grid 4 again.Burner hearth 3 bottoms are the individual member 6 that can freely load and unload, and can link to each other with burner hearth 3 bottoms by bolt 9, and its inner surface is a conical surface, can closely suit with cloth gas coning 5 male cone (strobilus masculinus)s.Cloth gas coning 5 is held on the conical surface of individual member 6, when reaction can with its formation conical surface seal.Owing to do not have overflow pipe to pass through reaction zone, when reaction, can not exert an influence to fluidized state.Discharge duct 7 is positioned at the bottom of burner hearth 3 and cloth gas coning 5, and links to each other with burner hearth 3.During discharging, upwards jack-up cloth gas coning 5 can make powder along flowing into discharge duct 7 between cloth gas coning 5 outer surfaces and individual member 6 inner surfaces.If needed, also can unload individual member 6, cloth gas coning 5, distribution grid 4 or burner hearth 3 are cleared up, safeguarded or change, normally move to guarantee product quality and equipment.

Claims

1, a kind of fluid bed, form by furnace shell (1), burner hearth (3), distribution grid (4), cloth gas coning (5), heater and installing zone (2) thereof, air inlet pipe (8), discharge duct (7), air inlet pipe (8) is connected with cloth gas coning (5) bottom, it is characterized by: described burner hearth (3) bottom is an inner conical surface, can closely suit with cloth gas coning (5) male cone (strobilus masculinus), cloth gas coning (5) is held on the inner conical surface, and discharge duct (7) is positioned at the bottom of burner hearth (3) and cloth gas coning (5), and links to each other with burner hearth (3).

2, according to the fluid bed of claim 1, it is characterized in that: the individual member (6) of described burner hearth (3) bottom for can freely loading and unloading.