CN201168597Y

CN201168597Y - Fluidized bed cribellum and double-layer fluidized bed

Info

Publication number: CN201168597Y
Application number: CNU200820069622XU
Authority: CN
Inventors: 王志勇; 郎胜利; 王有伦; 廖学建
Original assignee: HENAN WEILAI ALUMINUM GROUP
Current assignee: HENAN WEILAI ALUMINUM GROUP
Priority date: 2008-03-18
Filing date: 2008-03-18
Publication date: 2008-12-24
Anticipated expiration: 2018-03-18

Abstract

The utility model discloses a fluidized bed sieve plate and a two-layer fluidized bed. An air inlet of the sieve plate is provided with an air inlet pipe, and the top of the air inlet pipe is provided with a wind cap which is provided with a jet orifice; when being used, air enters the air inlet pipe from the air inlet, and then is jetted out of the jet orifice of the wind cap. The wind cap fulfills the functions of blockage and seal in the middle, can efficiently block dropping materials, and the jet orifice is arranged to take in air from various directions, thereby strengthening the fluidization effect greatly. The air inlet pipe fulfills the buffer function, thereby reducing the abrasion speed to the sieve plate greatly, and at the same time, also lowering the maintenance difficulty. When being maintained, a new wind cap is only needed to be changed; the material dropping phenomenon existing in the traditional sieve plate and the two-layer fluidized bed is efficiently avoided, the fluidization effect of the materials is good, the maintenance difficulty is lowered, the maintenance amount is reduced, the pollution to the surrounding environment caused by frequent maintenance is reduced, the maintenance difficulty is lowered, the continuous normal work of production can be ensured, and the economic benefit and the social benefit are enhanced.

Description

A kind of fluid bed sieve plate and two-stage fluidized

Technical field

The utility model relates to a kind of fluid bed sieve plate, also relates to a kind of two-stage fluidized that adopts this sieve plate simultaneously, belongs to chemical technology field.

Background technology

Fluidized-bed reactor is provided with as a kind of reaction efficiently, is mainly used to carry out gas-solid phase reaction and liquid and solid phase reaction, is widely used in the Chemical Manufacture.Sieve plate in the fluidized-bed reactor has decisive influence to the fluidization quality of fluid bed and the operating characteristics of reactor, and sieve plate mainly plays following effect: the supporting quiescent bed bed of material; Gas phase is evenly distributed, make bed material and material fluidisation equably, form good initial fluidized state, guarantee to form good gas-solid contact condition, make all particles be in abundant contact condition, avoid the appearance of channel, turbulent, bad phenomenon such as bubble size is excessive, fluidisation dead band; Bulky grain those fluidizing performances are poor, that have deposition to be inclined on sieve plate is in time discharged, and avoids the fluidisation layering, guarantees that normal fluidized state is not destroyed, and keeps safety in production; In the fluid mapper process, the bed material is not to the air compartment reverse flow.

Traditional fluid bed sieve-plate structure is simple, only by actual production perforate on sieve plate, but there is the disadvantage of a lot of aspects in use in this sieve plate: 1, lower gas is big to the wearing and tearing of sieve plate, maintenance difficult, can only adopt argon arc welding that wind-tunnel is blocked during maintenance, but can only keep about 2 months after making amends for one's faults, and maintenance is extremely inconvenient; 2, easily produce and fall to expect phenomenon: in process of production, fluctuate as negative pressure, partial material can drop by sieve plate, if when the system failure does not have negative pressure, material can all drop by sieve plate, influences ordinary production; 3, fluid effect is poor: in the fluidized reaction process, have the fluidisation dead angle, the phenomenon of gathering materials is arranged, especially more serious at sieve plate edge and feed opening, cause sieve plate to stop up, cause fluid bed under the situation of long-time running, effectively the fluidisation area is fewer and feweri, influences ordinary production.Existing two-stage fluidized only is fixed with the closed conduct of perforate on the air admission hole of lower floor's sieve plate, the effect of serving as blast cap, the sieve plate on upper strata is traditional sieve plate, still there is the existing disadvantage of traditional sieve plate in two-stage fluidized, and particularly top bed material exists, and disadvantages such as material, fluid effect difference more obvious.

The utility model content

The purpose of this utility model is to provide a kind of be difficult for falling material, fluid bed sieve plate and two-stage fluidized that fluid effect is good.

For achieving the above object, the utility model by the following technical solutions: a kind of fluid bed sieve plate, offer air admission hole on the sieve plate, described air admission hole is provided with air inlet pipe, the top of air inlet pipe is provided with the blast cap of offering spray-hole.

Described blast cap is the mushroom-shaped blast cap.

Described air admission hole is circular, and air inlet pipe is the cylindrical shape air inlet pipe, and air admission hole is staggered.

Percent opening on the described sieve plate is 0.3%～0.5%, and the angle that the spray-hole injection direction becomes with horizontal line is 0～45 °, and the equivalent diameter of spray-hole is 0.10～0.15 with the equivalent diameter of air admission hole ratio.

Two-stage fluidized comprises two-layer sieve plate up and down, all offers air admission hole on the two-layer up and down sieve plate, is provided with air inlet pipe on the air admission hole of described upper strata sieve plate and lower floor's sieve plate, and the top of air inlet pipe is provided with the blast cap of offering spray-hole.

Described blast cap is the mushroom-shaped blast cap.

That adopts that the utility model can avoid effectively that traditional sieve plate and two-stage fluidized exist disadvantages such as material, fluid effect are poor, maintenance inconvenience, blast cap plays in the centre and blocks and sealing process, can stop to fall material effectively, under the situation of long-time no negative pressure, top bed material can not drop, and can guarantee to produce and carry out smoothly; Because air admission hole is provided with air inlet pipe, the top of air inlet pipe is provided with the blast cap of offering spray-hole, gas is through the ejection of the spray-hole from the blast cap after the air inlet pipe, and not from air admission hole or directly ejection around it, air inlet pipe plays the effect of buffering simultaneously, air admission hole pressure is on every side reduced greatly, thereby reduced the rate of wear greatly to sieve plate, reduced maintenance frequency, saved unnecessary manpower and materials expenditure, simultaneously also reduced maintenance difficulty, only needed during maintenance former blast cap is removed, changed new blast cap and get final product; The fluidisation area is increased, spray-hole is set on blast cap, can multi-direction air intake, eliminated the fluidisation dead angle, the fluidisation area has increased by 1/4, has strengthened fluid effect greatly; Double-deck sieve plate is all set up blast cap, makes the pressure of top bed material bring up to 4KPa by original 3KPa, the uniformity of temperature profile in the fluid bed, basic indifference; The utility model has avoided effectively that traditional sieve plate and two-stage fluidized exist expect phenomenon, the fluid effect of material is good, reduced maintenance difficulty, and reduced maintenance frequency, reduced the pollution that surrounding environment is caused because of frequent maintenance simultaneously, reduce maintenance difficulty, can guarantee normally carrying out continuously of production, improved economic benefit and social benefit.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of sieve plate;

Fig. 3 is the structural representation of blast cap.

The specific embodiment

Fluid bed as shown in Figure 1, comprise upper strata sieve plate 1 and lower floor's sieve plate 2, all have staggered circular air admission hole 3 on upper strata sieve plate 1 and the lower floor's sieve plate 2, cylindrical shape air inlet pipe 4 is set on the air admission hole 3, the top of cylindrical shape air inlet pipe 4 is provided with the mushroom-shaped blast cap 5 of offering spray-hole 6, the relative dimensions parameter is: the percent opening of air admission hole 3 is 0.4% on upper strata sieve plate 1 and the lower floor's sieve plate 2, and the equivalent diameter of spray-hole 6 is 0.12 with the equivalent diameter ratio of air admission hole 3.

During use, gas enters fluid bed by the bottom, expect to react with the bed on the sieve plate through air admission hole 3, air inlet pipe 4, blast cap 5 and spray-hole 6 backs successively, react efficiently thereby make the material of participating in reaction be in sufficient fluidized state, that can avoid effectively also simultaneously that traditional sieve plate and fluid bed exist disadvantages such as material, fluid effect are poor, maintenance inconvenience.

Claims

1, a kind of fluid bed sieve plate offers air admission hole on the sieve plate, it is characterized in that: described air admission hole is provided with air inlet pipe, and the top of air inlet pipe is provided with the blast cap of offering spray-hole.

2, fluid bed sieve plate as claimed in claim 1 is characterized in that: described blast cap is the mushroom-shaped blast cap.

3, fluid bed sieve plate as claimed in claim 1 or 2 is characterized in that: described air admission hole is for circular, and air inlet pipe is the cylindrical shape air inlet pipe, and air admission hole is staggered.

4, fluid bed sieve plate as claimed in claim 3, it is characterized in that: the percent opening on the described sieve plate is 0.3%～0.5%, the angle that the spray-hole injection direction becomes with horizontal line is 0～45 °, and the equivalent diameter of spray-hole is 0.10～0.15 with the equivalent diameter of air admission hole ratio.

5, two-stage fluidized comprises two-layer sieve plate up and down, all offers air admission hole on the two-layer up and down sieve plate, and it is characterized in that: be provided with air inlet pipe on the air admission hole of described upper strata sieve plate and lower floor's sieve plate, the top of air inlet pipe is provided with the blast cap of offering spray-hole.

6, two-stage fluidized as claimed in claim 5 is characterized in that: described blast cap is the mushroom-shaped blast cap.

7, as claim 5 or 6 described two-stage fluidizeds, it is characterized in that: described air admission hole is for circular, and air inlet pipe is the cylindrical shape air inlet pipe, and air admission hole is staggered.

8, two-stage fluidized as claimed in claim 7, it is characterized in that: the percent opening on the described sieve plate is 0.3%～0.5%, the angle that the spray-hole injection direction becomes with horizontal line is 0～45 °, and the equivalent diameter of spray-hole is 0.10～0.15 with the equivalent diameter of air admission hole ratio.