JPS5944501A - Fluidized-bed boiler plant - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention operates a compressor to inject combustion air into a double-bed boiler to fluidize particles in the boiler and supply fuel onto the fluidized bed in the boiler. and burn it,
The present invention relates to a fluidized bed boiler plant that generates steam by heating heat transfer tubes disposed within the fluidized bed.

In conventional fluidized bed boiler plants, particles are fluidized.

Since there is a loss of pressure equal to the amount of charge of the particles when the particles are heated, the rated power of the compressor changes to This has become an obstacle to establishing economic efficiency.

Therefore, the present invention provides a fluidized bed boiler plant that solves these problems, and is characterized by providing a gas turbine for operating a compressor, and directing the exhaust gas in the fluidized bed boiler to the gas turbine. This is because an exhaust gas pipe was installed to introduce the gas. According to this configuration, the exhaust gas generated in the boiler can be introduced into the gas turbine and the compressor can be operated by the gas turbine, which increases plant efficiency and establishes economic efficiency. .

A first embodiment of the present invention will be described below with reference to FIG. (1) is a fluidized bed boiler, the inside of which is partitioned into a combustion air introduction chamber (3) and a combustion chamber (4) by a perforated plate (2), and dolomite, limestone, etc. are placed on the perforated plate (2). Particles consisting of are placed. (The other is the compressor, which sucks the popular (6) "Cmm chamber air introduction chamber 3)"
Hot firing air is forced into the inside. As a result, combustion air is blown up through the holes in the perforated plate (2), and the particles are
117 to form a fluidized bed (7). (8) is fuel (coal), and the flow i1i/J K
g(7) and is combusted. 1
(9) is the IJIL fluidized bed (heat exchanger tubes installed in both layers, and communicates with the steam drum Q0. 00 is a circulation pump, and Q'4 is installed in the upper part of the combustion chamber (4). One end of the superheating tank is connected to the steam drum 0(), and the other end is connected to the steam turbine 03.0 is a generator operated by the steam turbine θ1, 09 is a condenser,
OQ is the condensate hose 0η is the deaerator, OQ is the boiler feed water pump, 4 is the feed water heater, (c) is Mj coal 2:), Qυ)
ω is the first exhaust gas pipe that connects the upper end of the boiler (1) and the suction port of the gas turbine (E); A second exhaust gas pipe connecting the discharge port and the economizer, (c) a bypass tamper provided in the bypass connecting the ifU exhaust gas spine QS12-v, and (c) a pressure cuff 1; , receiving the input signal from the induction motor C1l and the pressure signal in the boiler (), 2+3
The cabana valve eθ installed on the exhaust gas vibrator
This system g1) jl/, it's hot! 4" (4) The operation of the above configuration, which maintains the pressure within one electron, will be explained. First, the compressor (5
Let's make a Mm. Combustion air is introduced into the boiler (1) due to this, and a fluidized bed (7) is formed.41. Ru. The important thing here is that the boiler (]) is powered by the compressor (5).
This means that the pressure at which combustion air is introduced into the combustion chamber has to be increased compared to conventional methods. In other words, whereas in the past only the pressure necessary to form the fluidized bed (7) was applied,
In this embodiment, a pressure higher than 11 is applied to a so-called force 1j pressure fluidized waste boiler. Therefore, the combustion chamber (
4) The upper part of the chamber is under relatively high pressure. In this state, fuel (8 liters) is supplied onto the fluidized bed (7) and ignited. The high-temperature, high-pressure exhaust gas in the upper part of the combustion chamber (4) is sent to the gas turbine via the first exhaust gas pipe (c). 3, which causes the gas turbine (c) to operate.
Even if the induction motor (2) stops operating, the compressor (
5) is applied to the gas turbine. In addition, the excess Bib force (in the gas turbine) and the remoter Ql) are used to recover 11L force and C. The υ1 gas that exited (to the cast turbine) is the 2nd D1: gas pibre, V
Introduced the first energy saver Tsukino through the system, and added water to the boiler! The gun was released into the atmosphere (Ha) 11 (Saishuru 1)
, - - On the other hand, the steam drum (IO) is heated through the heat tube (9), IJ11 is heated, and the steam is heated after being vortexed in the tube (Q). The turbine (l, 9 inside l is turned on, and the steam generator θ'9 is activated. The steam coming out of the steam turbine θ'9 is
The water is condensed at j5:i,'2,jCΔqi'j'ut O'
1), water is added to the steam drum θ (J) via water supply 1"'.

1. of the present invention. ] The fruit of 2, 11111 cases are the second ('Q'
The explanation will be based on J. Note that the fll- component of L4+1 to the actual L1; 414), which is the same as the 3rd example, is given the same reference and the explanation is omitted as F';1. The pipe is an Al14 gas pipe that connects the upper end of the boiler (1) and the suction port of the gas turbine ψ, and it branches into two branches (CBOA) (8013) in the middle. 31) Mold each branch CBOA) C31
) Intervening superheating 1) and carburization 2;), 噸)
(Foundation) is a motor tamper installed at the bottom of each branch part (80A) (80B), and is controlled by a pressure regulator so that the pressure in the combustion chamber (4) is maintained constant. 13'il is a bypass damper. Note that one of the branch parts (30A) and the discharge port of the gas turbine (to the gas turbine) communicate with the atmosphere 40.

In the configuration described above, the high temperature and high pressure IU exhaust gas in the upper part of the combustion chamber (4) is passed through the exhaust gas pipe 911J and the branch part (R
After entering the energy saver 0 via the gas turbine (oB), it is introduced into the gas turbine (e), which operates the gas turbine (2) and the compressor (5). In this case, the induction motor Qυ of the compressor (5) is
Z is used as an auxiliary power when the load is negative. gas turbine(
The exhaust gas emitted from c) is dissipated into the atmosphere -). However, when the load is low, hrc j, t, and RC scrap i drop, so the motor tamper (incorporated) is fully opened and the motor damper il
Let l be fully closed. Note that if the output of the gas turbine ( ) is still insufficient, the motor QO should be operated to
ib 1, where, for example, the evaporation rate is 16t/h.
Comparing with a boiler, the compressor (5
), the in-plant power ratio is 1, and the plant efficiency is <27.4%, whereas when the compressor (5) is driven by a gas turbine as in the embodiment of the present invention, There is no significant improvement in θ [house labor ratio 7%, plant efficiency 29.7%, and 4C].

According to the above-mentioned (5ft DJIl) Ll boiler plant of the present invention, boiler)='J-U generated
1 waste is introduced into the gas turbine and the compressor is operated by the waste turbine 8+! It is possible to increase plant efficiency and improve economic efficiency @ ``+'1.
It is something that makes you

[Brief explanation of drawings]

FIG. 1 shows four examples of the first fruits of the present invention as 4ζ-J'll;
',B11'+R'++', bright, RJ 1 Figure shows ε, 72 of the present invention and how to implement it. Boiler, (5)...Compressor, (7)...Fluidized bed, (8)...Fuel, (
)...Heat transfer d1@...Gasta-bin, to)...
・・Ship l exhaust gas pipe, 轡・・Exhaust gas pipe agent
Yoshihiro Morimoto

Claims (1)

[Claims] 1. Operate the compressor to pressurize combustion air into the Flow 11i11fH boiler to fluidize the particles in the boiler, supply fuel onto the fluidized bed in the boiler and burn it,
In a fluidized bed boiler plant in which steam is generated by heating heat exchanger tubes disposed within the fluidized bed,
- A fluidized bed boiler plant, characterized in that it is provided with a gas turbine for operating the combresor, and an exhaust gas pipe for introducing exhaust gas in the fluidized bed boiler into the gas turbine.