JPS5954649A - Cement raw material preheating device - 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 is an IT device that effectively utilizes the sensible heat of the gas from the suspension preheater in the process of manufacturing methane, by introducing the antagonistic gas into the pulverizer for methane I and raw materials, This invention relates to an improved device capable of increasing energy efficiency when simultaneously drying and pulverizing cement raw materials.

When firing seven-mention raw powder, these powders are usually preheated by gas control from a firing furnace, etc., and then supplied to the firing furnace. ．． rl Due to the recent rise in fuel costs, the energy efficiency industry is also increasing.
This has been a big issue. From this point of view, as shown in FIG.
, "y" 5R Zaik Nzore □Hee □ri is adopted.1.
It's coming. , (7) (~Breheater, new", set-I-
Although the difference in equipment costs between the 6F 4-stage type and the 5-stage type is not that large, the difference in equipment costs between the 6F 4-stage type and the 5-stage type is 1.
2V (Modification - J-Luni υ3 [frame] 1, which requires significant reinforcement, etc.C) Gentleman's cost α is prohibitive, and heat recovery efficiency is improved.]-Saze/ Most of the flint will be lost.・・・
The present invention η; Newly established due to the current situation] Lifting platform, 1.
Mojiron? When modifying Jγ's 1st stage saike, mouth □n, and brake heater, the heat recovery effect that can be achieved by comparison curve section'< uv i / ζ actual i 4' is good.
This is to provide a convenient location.

・Figure 1 shows a conventional one-stage cyclone preheater.
Preheating of Gensai 1, 41!℃ diagram of firing equipment - Lisbenone 1 Infrehik, Calcining furnace 12, Calcining furnace 12, Rotary kiln etc. Cement 1-Hara I'1 powder supplied by.

”: Each of the first to fourth cyclones 2. ~24 is lowered to F, and the high heat from the power plate kiln and i:ci forming furnace is sucked by the exhaust windmill 6, and the gas is sucked out by the exhaust windmill 6. , the mixing of raw material powder and high-temperature gas, heat exchange, and thickening 11 are repeated in the duct 1' and the siphon 11.

・In this four-stage Zyclone system, the top stage cyclone 2. Karanori [air wind turbine connection tact: υ1 gas temperature when entering the crusher through 31 may be too high, and the drying process that is carried out together with pulverization (pulverization at 200 mm) may also be too long and excess waste heat is wasted. It is desirable to make effective use of this surplus heat.

On the other hand, if one more Zylon is added to the 5-stage stage, the exhaust gas temperature may become so low that drying in the crusher may not be possible.

In this way, from the standpoint of heat and energy, a four-stage cyclone is insufficient for efficient use of waste heat, and the five-stage cyclone is insufficient for stable operation. We have solved the problem of sufficient raw material cement and heat equipment that satisfies both thermal energy and stable operation.

Therefore, the inventor of the tree installed a dust collector that also served as a preheater between the cyclone in the first part of the preheater ('top cyclone) and the exhaust windmill in the 4-stage Iklon system, and installed a dust collector that also served as a preheater. 7 and preheat 1. By arranging the preheating stage so that the raw material powder is fed into the duct that connects the top stage Zyclone and the cyclone below, and by placing a part of the raw powder in a dust collector that also serves as preheating. Do not pass through [LC interview and insert the duct reco V]
(C) Upstream cement raw material powder is supplied to the duct at a constant temperature to the first two-stage Zyclone)1. As the wind rises, the gas at a constant temperature is 11) strained. This'i1. Improved energy efficiency and stable operation resulting from efficient drying
The present invention has been completed by obtaining the following.

An example of the apparatus 6 of the present invention is explained with reference to FIG.
l-? -) In front of the dust collector 8, all or most of the raw material powder is introduced into the dust collector 8 by a damper 10 for adjusting the flow rate, and the rest is sent directly to the raw material transporter 5.

The raw material powder f/ipl preheated and collected by the dust collector 8 is sent to the raw material transporter 5 via the output sheet 9, passes through the duct 32, the cyclone 2□, the chute 4, and the following ducts 33,
Cyclone 2□, chute 42, duct 34, cyclone 23, shiko, =i:4. ．． , calcining furnace 12, Daito 3
．． , the cyclone 24 and the unit 44 descend while being preheated by the preheater 7 and enter the rotary kiln I. On the other hand, the heat-exchanged exhaust gas d passes through the duct 31 in the reverse order and finally enters the cement raw material mill from the dust collector 8 and the outlet of the exhaust windmill.

In the present invention, the number of heat exchanges is the same as in the case of the five-stage cyclone preheater, but since there are cases where the amount of cement raw powder is adjusted and not all passes through the dust collector, it is possible to Exhaust gas temperature never gets too low. ]: 11 air out of the windmill [] When the temperature of the turtle is low, put it into the dust collector; ・, ) Decrease 1. (-1) On the contrary, increase the amount of it that is put directly into the transporter, and conversely when the temperature is high, put it into the dust collector By injecting 11 into the exhaust windmill, the exhaust gas temperature of the exhaust windmill can be constantly reduced by 51-υ', Drying and cutting in a crusher can be done with 1'i'i surname 2 + j (cut rate, 1.〈can be done.

Here, the M: dust machine i/: 1 Zykron, which also serves as r-heat, is the most t [4, its mode is the same as that of the current Yykron; (r) −1,
(cut 1r11th (il:Xl) (-1J-Iku o
7'751 et al. (7) Kay, wo'ffjll &,
j to J:II Il+-4-ru": sea urchin 1. damono)
There are also Figs. 7 and 8 (a variation of Fig. 5), and all of the fangs 1 can be used for external purposes. 49.・, In Figure 2, υ, 1 Temporary・Sakai Furnace・Kino゛Liss Benz Fun Preheater/j Case ll (I tried one with two, but the Inverse・Grade Furnace does not work) Blade Spen/4I Insole Heater Also used is vj, of course; 1sil Z+,.

According to the present invention, f"1. te 1.1;', 11! >, When drying, if you use a 111-stage cyclone break heater with 5 stages, it will enter the crusher J'1 gas 7! IMI I is low, and depending on the moisture content of the raw material, υ': Drying and operation are sufficient.In comparison, it is possible to always maintain a constant exhaust gas temperature by adjusting the raw material powder: I and passing it through a dust collector. Of course, it is possible to maintain the temperature at a necessary or sufficient temperature depending on the moisture content of the raw material, which improves the energy efficiency of the preheater, cement, and raw material mill, and enables stable operation.

Furthermore, when modifying an existing 4-stage cyclone breaker heater to the device of the present invention, unlike when modifying a 55-stage cyclone breaker heater, significant reinforcement of the entire frame is required, and preheating is required. The temperature of the dust collector that also serves as a dust collector is low, so there is no need for a brick lining, and the frame can be made smaller.

[Brief explanation of drawings]

IXI is a schematic diagram of a conventional four-stage Zyclone preheater, and Figure 2 υ is a schematic diagram of the device of the present invention.
f, UK Figure Theari, m 3 Figure (1I Figure f=,
A, -A cross section of I No. 31xl), Fig. 5 (Fig. 6 U1
Row 13 of Figure 5 Ii), Figure 7, Figure 8 C3
1. Each aspect of the dust collector (Zychrono) that also serves as preheating of the present invention is shown. Wind turbine connection duct: 32 ~ ;) 4 ...Zykron connection duct I.
;35...Calcination furnace ~Fth stage Zyclone connection duct 4,~114・Zyklon raw duct 1 discharge chute 5
・・・・・・Haraita (transport machine 6 ・・Bleed air windmill 7 ・Seven men LD Chute to the dust collector which also serves as preheating of D material powder 8 ・・・1 and 14 dust machine which also serves as P heat) 9.11...Cement raw powder 7 to transport machine
--To 10 ・Adjustment + 4ffi damper 12 Calcining furnace 13 ・Raw material mill 4j1' Applicant ``1hon Shichiment Co., Ltd. Agent
Patent Attorney fJI Akira Higashi Fig. 1 Fig. 1 ( Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8

Claims (1)

[Claims] (1) A collection point that also serves as preheating is provided between the duct connecting the two-stage ICRON and the exhaust air 2 of the heat preheater, and the gas collection point of the dust collector is installed. A sheet is provided for introducing the raw material, and a unit for discharging the preheated raw material is provided at the bottom of the dust collector, and the unit is connected to a transport machine that transports the raw material above the preheater, and the transport machine is connected to the preheater. A cement raw material No. 1-1 preheating device (7+'f-
Cement raw material preheating device (which also serves as heat / ζ dust collection) (specified in Part 8-1, Scope of requirements (1) Jll, where the number is Zyclone)
3) - Reikron is 1 part is cylindrical, the lower part is inverted circle A.1
1, and the gas is about to exit the 1'J1 pipe.''
Reverse circle (1 & continuation to side 11.i of part 11 of Iil 11) Patent Claim No. 571 (:>) JJ'4 7-ment original preheating device line (4) Dust collector gas person IXI part publication near 1. The cement according to claim No. (]) or (2) or (3), characterized in that the sheet into which the raw material is introduced has a flow regulator. Raw material preheating device (5) Flow ■ The cement raw material preheating device according to claim (4), wherein the regulator is a damper.