JPS61293544A - Grain transfer apparatus - Google Patents

Abstract

PURPOSE:To increase the thermal efficiency and the durability or the like of the titled apparatus by providing a slanted pipe for gas circulation and grain transfer which is slantingly provided downward in a side from a freeboard part and joined to a hopper and providing a fluidization mechanism of a grain to an underside of the surface of a fluidized layer. CONSTITUTION:The drawn-out grains a' incorporated in a grain drawing out pipe 4, a grain descending pipe 21a and a grain ascending pipe 21b are fluidized by blowing a gas b' for the fluidization and the transfer into the pipes 21a, 21b through the nozzles 22a, 22b and 22c. Then the drawn-out grains a' are transferred from the fluidized layers (a), (b) of the inside of a reactor 1 to the pipe 21b with the pressure difference caused from the grains itselves, and transferred to the first hopper 6 via the slanted pipelines 20a, 20b with the gravity. A gas b' for the fluidization and the transfer ascending to the pipe 4 from the pipe 21a is flowed into the fluidized layers (a), (b) of the inside of the reactor 1 and mixed to the inside of a freeboard (c).

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a particle transfer device in a fluidized bed reactor such as a coal gasifier or a fluidized bed catalyst device.

(Conventional technology) A conventional example of the particle transfer device for a fluidized bed reactor is as follows.

As shown in FIG. 2, the reactor (1) includes a supply pipe (1α) for particles (, Zl), a supply pipe (1b) for fluidizing gas (A),
Output pipe (iff) for generated gas (O'), dispersion plate (ld)
) and a particle extraction pipe (4) for the particles (α) in the fluidized bed, etc., and a fluidizing gas (b) is supplied from below into the particle (a) layer on the distribution plate (ld) to form the fluidized bed. (α,b)K
As the fluidized gas (A) is formed, the fluidized bed (α,
A) and the free port formed on top of it)' (C
), and is discharged from the extraction pipe (IC) as a generated gas (C') to the outside of the system, and the particles (α) are transferred from the supply pipe (1α) to the fluidized bed (cL, ,
6) It has a structure in which it is supplied into the reactor and functions as a reaction or catalyst.

In addition, a particle extraction pipe (4) extending from the first dispersion plate (1d) to the lower part of the reactor (1) is equipped with a rotary pulp (5).
, 1st hopper (6), 1st partition Zino 9 loop (power, 1st
The airtight pulp (8), the second hole/hole (9), the second partition Sibals (LOl, the second airtight pulp αD, etc.) are successively installed, and the particles (α) in the fluidized bed (α, b) are The particle (α) in the fluidized bed (α, b) passes through a single particle extraction pipe (4), and the amount of extraction is controlled by a rotary pulp (5). (61, the first partition pulp (power) is stored in the second hopper (9) through the first airtight pulp (8), and the second hopper (9)
When the particles inside are full, the particles (α) move to the first partition F
)/e pulp (7), followed by the first airtight pulp (8), and after adjusting the pressure in the second pulp (-(9)) to balance the pressure outside the system, the second airtight pulp αυ and The second partition Sivalp<11 is opened to discharge the extracted particles (α') out of the system.During the extraction of particles in the second hole (9), the particles extracted from the fluidized bed (α, b) are It is stored in the first hopper (6).

When the particles in the second hot spring (91) have been extracted from the system, the second partition SIBALPU 0I, and then the second airtight pulp aυ are closed, and the first hot water (-(6) and the second hot water) are closed. (
After adjusting and balancing the pressure in the second hopper (9) with the pressure in the second hopper (9), open the first airtight pulp (8) and then the first partition nozzle (7), and open the first hopper (6). ) are introduced into the second hopper (9), and by repeating the above series of operations, particles (α) in the fluidized bed (α, b) are continuously extracted and particles (α′) are introduced into the second hopper (9). The structure is such that it can be extracted and transported outside the system.

(Problems with the Prior Art) In the conventional particle transfer device, when the temperature of the fluidized bed is higher or lower than room temperature, the thermal energy of the particles in the fluidized bed is extracted out of the system without being recovered. When the loss of thermal efficiency is large and the temperature difference between the extracted particles (α') and the first airtight pulp and the second airtight pulp is large, both the airtight pulps are deformed by the heat of the particles, causing damage to the sealing part. 1. Gas inside the reactor leaks out of the system due to loss of sealing properties due to particle entrapment and accelerated corrosion, etc.)
In addition, there are other problems such as the intrusion of gas from outside the system into the reactor, which may cause the equipment to stop operating.

(Objective of the Invention, Means for Solving the Problems) The present invention has been developed to solve the above-mentioned problems. A particle transfer device for a reactor that extracts and transfers particles from the reactor, comprising: an inclined piping for gas circulation and particle transfer, which is installed diagonally downward from the freeboard portion of the reactor and is connected to a hopper; A fluidization transfer pipe for the extracted particles, which is connected to the lower particle extraction pipe, is connected to a portion of the inclined pipe below the surface of the fluidized bed, and is equipped with a mechanism for fluidizing the particles using gas; It is characterized by a structure equipped with a heat exchange mechanism installed in the transfer pipe, and the extracted particles are fluidized with gas and transferred between the particle extraction pipe of the reactor and the hopper, and the particles are transferred during the transfer. This particle transfer device solves the above-mentioned problems by recovering and cooling the sensible heat of the particles, increasing the thermal efficiency, increasing the reliability and durability of the particle extraction and transfer device, and significantly improving the particle extraction and transfer performance. is to provide.

(Example) Fig. 1 shows an example of the present invention. ), extraction pipe (1c) for generated gas (α')
, a dispersion tube (1d), a particle extraction tube (4), etc., and a fluidized bed (α, A) and a free board (c) are placed on the dispersion plate (1d) in the reactor (1). ) is formed, and (6) in Figure 1 is the first hopper, (the force is the first partition sieve, (8) is the first airtight pulp,
(9) is the second hopper, α@ is the second partition, aυ
is the second hermetic pulp.

Furthermore, an inclined pipe for gas circulation and particle transfer (
20a, 2OA) are installed in series, and the inclined piping (20α,
A particle downcomer pipe (21α) is connected to the first hopper (6) K at its lower end, and is obliquely installed at the bottom of the particle extraction pipe (4) provided at the bottom of the reactor (1).
A vertically installed particle rising pipe (21j) is connected, and the upper end of the particle rising pipe (21A) is connected to the inclined pipe (20α, 2
The surface of the fluidized bed (α, A) in 0b) is also connected to the lower part as shown in the figure. Multiple nozzles k (224) C22 that blow gas (b')
b) C220) and further a heat exchange fluid (d)
A jacket (C) having supply and exhaust pipes (24αX24b) is attached to the nozzle (22αX22A) (22
c) Particle downcomer pipe (215) and particle riser pipe (21A)
A fluidization mechanism (22α, 22b,
22C), and the supply and exhaust pipes (24α) (24
b) The jacket (c) has a heat exchange fluid (d)
The heat exchange mechanism (23) with the extracted particles (α') is
, 24α, 24b), and the particle downcomer (21
α) and the particle riser (21A) are fluidized mechanisms (22α,
22b.

22C) and a fluidization transfer pipe (21α,
21b), further comprising the inclined pipe (20α,
20b) is the extracted particle (α′) that is being fluidized and transferred.
The function is to circulate the gas inside the freeboard (C) in the reactor (1) through the piping (20α), and to circulate the extracted particles (-') after the gas separation through the piping (20b). It is configured to have a function of transporting particles by gravity to the first hole (6).

(Function) Since the embodiment of the present invention has the above-mentioned configuration, the fluidization transfer gas (b') is passed through the nozzle (22αX22b
) (22C) to the particle downcomer (21α) and the particle riser (
21A) by blowing into the particle extraction tube (4).
The extracted particles (α') in the particle downcomer pipe (21α) and the particle riser pipe (21b) are fluidized, and the extracted particles (α are caused by the pressure difference generated from the particles themselves) into the reactor (1). The particles move from the fluidized bed (cL, b) to the riser pipe (21b), and the pipe (20α, 20b) of the inclined pipe (20α, 20b)
b) and then transferred to the first hotu mo (6).

In addition, the fluidization transfer gas (b is the pipe C2D of the inclined pipe (20α, 20b) that has risen through the particle riser pipe (21b)
t
The fluidized transfer gas (b') rising to the reactor (1)
It flows into the fluidized bed (α, b) inside and is mixed into the freeboard (C). Furthermore, in the particle downcomer pipe (21α) and the particle riser pipe <21b), when the extracted particles (α) are fluidized and transferred, the particles pass through the walls of both pipes and absorb the heat in the jacket (c). Heat is exchanged with the exchange fluid (d).

The temperature of the extracted particles (α) entering the first hopper (6) is determined by the temperature adjustment of the heat exchange fluid (d), or by the length of the particle downcomer pipe (21α) and the particle riser pipe (21b). It can be controlled by adjusting the area of the wall surface.

(Effects of the Invention) As described above, the present invention enables particles (α, b) of the fluidized bed (α, b) to be transferred from the reactor (1) in which the fluidized bed (α, b) and 7 Liebaud)' (t1?) are formed. In the particle transfer device (11), a hopper (
Slanted piping (2) for gas circulation and particle transfer connected to (6)
0α.

20b) and a fluidized bed (20α, 20A) in inclined pipes (20α, 20A) connected to the particle extraction pipe (4) at the bottom of the reactor (1).
α, A) The surface is also connected to the lower part and the gas (b')
Fluidization mechanism of particles (α) (22α, 22b, 2
Thermal fluidization transfer piping (21α, 21b) for the extracted particles (α′) attached with 2c) and the fluidization transfer piping (21α,
Heat exchange mechanism (23, 24α) arranged in 21b).

24b), there is no need for the conventional expensive rotary pulp for adjusting the amount of particles to be extracted, and the extracted particles are fluidized and transferred in the fluidization transfer pipe for heat exchange, resulting in a smooth process. It is possible to adjust the amount of the extracted particles, and the heat transfer coefficient between the particles and the pipe wall surface is significantly increased (250 to 500 Kcal/m"hr'c), and the fluidization transfer gas is transferred to the free board. Excellent heat recovery performance can be obtained and thermal efficiency can be significantly increased by the inflow of particles.In addition, the temperature difference between the airtight valve etc. connected to the hole and the extracted particles is extremely small. Damage to the structure, functional impairment, etc. are prevented, reliability and durability are significantly improved, and particle extraction and transfer performance is significantly improved. It also has the advantage of being simple in structure and easy to maintain.

The present invention has been described above with reference to embodiments, but of course the present invention is not limited to such embodiments, and the design of the seed rice may be modified without departing from the spirit of the present invention. It is.

[Brief explanation of drawings]

FIG. 1 is a mechanical diagram of a particle transfer device showing one embodiment of the present invention, and FIG. 2 is a mechanical diagram showing a conventional example. 1: Reactor 4: Particle extraction tube 6: Hopper addition α, 2
ob: Inclined piping 21α, 21b: Fluidization transfer piping 22
α, 22b, 22c: Fluidization mechanism field, 24α, 24b
: Heat exchange mechanism α, b: Fluidized bed C: Freeboard sub-agent Patent attorney Shige Okamoto 2 people outside of the text Figure 2 h-'

Claims (1)

[Claims] In a particle transfer device for a reactor that extracts and transfers particles of the fluidized bed from a reactor in which a fluidized bed and a freeboard are formed, the particle transfer device is provided diagonally downward from the freeboard portion of the reactor and connected to a hopper. The inclined pipe for gas circulation and particle transfer is connected to the particle extraction pipe at the bottom of the reactor, and is connected to a part of the inclined pipe below the surface of the fluidized bed, and is connected to a part of the inclined pipe for fluidizing particles by gas. A particle transfer device comprising an attached fluidization transfer pipe for extracted particles and a heat exchange mechanism disposed in the fluidization transfer pipe.