JPH0320716Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention involves forming a fluidized medium on a dispersion plate into a fluidized bed by introducing a fluidizing gas, and spraying and supplying various liquids to be treated into the fluidized bed. The present invention relates to a fluidized bed type liquid processing furnace.

(Prior art) A solution of various salts is sprayed into a fluidized bed of a fluidized medium that is fluidized by the inflow of hot air, and in the fluidized bed, water of crystallization, etc. in the solution is separated. A conventional example of a fluidized bed liquid processing furnace that processes and recovers salt by calcining it into powder or granules is as follows:
As shown in FIG. 3, a dispersion plate 2 provided inside the furnace body 1
A desired amount of fluidizing medium (sand, etc.) a is stored in the top, and hot air b for fluidization is continuously supplied from the hot air inlet 3 into the wind box below the distribution plate 2, and the fluidizing medium a is The solution C (coated liquid) is flowed upward into the furnace body 1 to form fluidized beds a and b. The atomized air d is blown out together with the treatment liquid), and the solution c is injected into the fluidized beds a and b.
The structure is such that it supplies air and liquid as a spray.

(Problems with conventional technology) In the conventional fluidized bed liquid processing furnace,
The gas/liquid ejection nozzle 4 flows into the fluidized bed a, from the distribution plate 2 side.
Since the upward ejection end of the gas/liquid ejection nozzle 4 is disposed in the fluidized beds a and b, the hot air b flows in to fluidize the fluidized medium and form the fluidized bed a. , b, and when the solution c is ejected and sprayed together with the atomized air d into the fluidized beds a and b, the air resistance caused by the ejection of the atomized air d causes the fluidized medium a to eject gas and liquid. This prevents the atomized air from entering the nozzle 4, but if the supply of atomized air d is stopped or the operation is stopped due to a power outage, incorrect operation, or compressor failure, the fluidized bed a, There is a risk that the fluidized medium a, etc. in b may fall into the gas/liquid ejection nozzle 4, causing the nozzle to become clogged, which poses problems such as operational reliability and hindrance to resuming operation. be.

(Purpose of the invention/Means for solving problems) This invention is an invention to deal with the above-mentioned problems, in which a fluidizing gas is introduced into a fluidizing medium on a dispersion plate to form a fluidized bed. In a fluidized bed type liquid processing furnace in which a liquid to be treated is sprayed and supplied by a gas/liquid jetting nozzle, the gas/liquid jetting nozzle is provided above the fluidized bed, and a downward jetting end of the gas/liquid jetting nozzle is provided. is arranged on the surface of the fluidized bed when it is at rest and below the surface when it is flowing, and a gas/liquid ejection nozzle that supplies the liquid to be treated into the fluidized bed is provided above the fluidized bed, By arranging the downward spouting end of the nozzle above the surface of the fluidized bed when it is at rest and below the surface of the fluidized bed, during operation, the liquid to be treated is sprayed and supplied below the surface of the fluidized bed when it is flowing. The supply and processing performance of the liquid is ensured, and even if the supply of air for spraying is stopped, there is no particular hindrance to the supply and processing of the liquid to be treated, and flow medium and the like are prevented from flowing into and clogging the nozzle. When the operation is stopped, the downward ejection end of the nozzle is on the stationary surface of the fluidized bed, which prevents the fluid medium from flowing into the nozzle, ensuring supply of the liquid to be treated, processing performance, and operational reliability. The object of the present invention is to provide a fluidized bed type liquid processing furnace which solves the above-mentioned problems.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 and 2, in which 1 is a furnace main body, 2 is a dispersion plate disposed in the furnace main body 1, and A fluidizing medium (sand, etc.) a is accommodated on the dispersion plate 2 inside by an appropriate mechanism (not shown), and a fluidizing gas (hot air, etc.) b
is continuously supplied from the inlet 3 into the wind box below the dispersion plate 2, and the fluidizing gas b is dispersed and flowed into the fluidizing medium a through the dispersing plate 2 to form fluidized beds a and b. It's getting old.

Further, a gas/liquid ejection nozzle 10 made of a double pipe is provided above the fluidized beds a, b in the furnace body 1, and the downward ejection end 10a of the gas/liquid ejection nozzle 10 is connected to the first As shown in the figure, when the fluidized beds a and b are at rest, the surface a (in other words, the fluidized medium a
The gas/liquid ejection nozzle 10 is disposed so as to be located above the surface of the fluidized bed and below the surface of the fluidized bed when the fluidized beds a and b are flowing, as shown in FIG. The liquid to be treated c flows in from the inlet 10c, the atomizing air (atomizing air) d flows into the outer pipe from the inlet 10d, and the liquid to be treated c and the atomizing air d flow through the downward jetting end 10a.
is ejected from below the surface of the fluidized beds a and b when flowing,
It is configured to be spray-supplied into fluidized beds a and b for treatment.

(Function) Since the embodiment of the present invention has the above-mentioned configuration, during operation, the fluidizing gas (hot air) b is continuously flowed upward into the fluidized beds a and b via the dispersion plate 2. As a result, the fluidized beds a and b become bulky as shown in FIG. Gas and liquid are ejected downward from the ejection end 10a into the fluidized beds a and b, and the liquid to be treated is sprayed and supplied into the fluidized beds a and b. For example,
A salt solution such as radioactive waste liquid can be treated with heat in a fluidized bed, and the salt in the solution can be recovered by calcination into powder or granules.

Moreover, even if the supply of the jetting gas d is reduced or stopped for some reason during the operation, the supply of the liquid to be treated c is ensured, and the flow medium a, etc. into the gas/liquid jetting nozzle 10 is prevented from being blocked. Even if a small amount of inflow occurs to the downward jetting end of the outer pipe, it can be easily discharged by resupplying the jetting air, and it will not cause any particular hindrance to the re-spraying of the liquid to be treated and the jetting air. Liquid processing can continue.

Furthermore, when the operation is stopped when the supply of the liquid to be treated c, the jetting gas d, and the fluidizing gas b is stopped, the surfaces of the fluidized beds a and b fall down to the stationary surface A, as shown in FIG. Since it is located below the downward ejection end 10a of the gas/liquid ejection nozzle 10, there is no inflow or blockage of the fluid medium a etc. into the downward ejection end, and there is no hindrance to restarting the operation, resulting in operational reliability. It will be done.

(Effects of the invention) As described above, the present invention allows the fluidizing gas b to flow into the fluidizing medium a on the dispersion plate 2 to form fluidized beds a and b, and the liquid to be treated c is jetted into the fluidized bed. In a fluidized bed liquid processing furnace that is sprayed and supplied by a nozzle,
The gas/liquid ejection nozzle 10 is provided above the fluidized beds a, b, and the downward ejecting end 10a of the gas/liquid ejecting nozzle 10 is placed above the surface A of the fluidized bed A, b when it is at rest and above the surface R when flowing. During operation, the liquid to be treated is ejected and sprayed below the surface of the fluidized bed, ensuring supply of the liquid to be treated and processing performance. Even if the supply of the liquid to be treated is stopped, there will be no particular hindrance to the supply and treatment of the liquid to be treated, and the flow of the fluid medium etc. to the nozzle,
Blockage is prevented, and when the operation is stopped, the downward ejection end of the nozzle is on the stationary surface of the fluidized bed, preventing the flow of the fluid medium etc. into the nozzle and blocking, and the flow medium into the nozzle is prevented. This effectively prevents inflow and blockage of liquids to be treated, improves processing performance, and improves operational reliability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal mechanical diagram showing an embodiment of the present invention;
FIG. 2 is a longitudinal mechanical diagram showing the operating state of FIG. 1, and FIG. 3 is a longitudinal mechanical diagram showing a conventional example. 1: Furnace body, 2: Dispersion plate, 10: Gas/liquid ejection nozzle, 10a: Downward ejection end, a: Fluid medium,
b: fluidizing gas, c: liquid to be treated.

Claims (1)

[Scope of utility model registration request] In a fluidized bed type liquid processing furnace, a fluidizing gas is flowed into a fluidized medium on a dispersion plate to form a fluidized bed, and a liquid to be treated is sprayed into the fluidized bed by a gas/liquid jet nozzle, above the fluidized bed. The fluidized bed type liquid is provided with the gas/liquid jetting nozzle, and the downward jetting end of the gas/liquid jetting nozzle is disposed on the surface of the fluidized bed when it is at rest and below the surface when it is flowing. Processing furnace.