JPS60191123A - Method of cleaning soot in multitubular type once-through boiler - Google Patents

Abstract

PURPOSE:To insert a high-pressure water cleaning device fitted with a nozzle at its tip end into the boiler from the inner part of the guide pipe to clean the combustion gas passage by providing each of guide pipes which passes through an upper header within the combustion gas passage formed between inner and outer annular water tube rows. CONSTITUTION:Water tubes are disposed at suitable intervals in the radial direction into two concentric annular water tube rows 3 and 4, and a combustion gas passage 5 is formed between the inner annular water tube row 3 and the outer annular water tube row 4. A plurality of guide pipes 10 for inserting the soot cleaning tool into the combustion gas passage 5 through the upper plate 1A and the lower plate 1B of the upper header 1, are provided. By use of this device, the high-pressure water cleaner fitted at its tip end with the nozzle into the boiler is inserted into the guide pipes 10 from the guide pipes 10 and is moved vertically within the combustion gas passage 5 to clean the water pipes. The nozzle is mounted so that the high pressure water is ejected horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cleaning soot from a multi-tubular once-through boiler.

Conventionally, both the upper header and the lower header are formed in an annular shape, and these lower headers are connected by a number of vertical light blue pipes, and these water pipes are spaced apart in the radial direction by 2111! In a multi-tube once-through boiler that is arranged in concentric annular water tube rows with a combustion gas passage formed between the inner annular water tube row and the outer annular water tube row, if soot adheres to the water tubes. Although it was possible to clean the combustion chamber side, etc., there was a drawback in that it was impossible to completely divide the combustion gas passage by 1.11.

The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a soot cleaning method that also completely cleans the combustion gas passage.

Below, a description will be given based on the drawings. A conventional multi-tubular once-through wheeler is shown in FIG. In other words, lower part Kanyose t! (1) and Shimogori angle curve (2) are formed in an annular shape at the bottom. These”-lower header (1).

(2) are connected by a number of vertical water pipes, and these water pipes are arranged in two concentric annular wood pipe rows spaced apart in the radial direction <3)
, (4,). A combustion gas passage (5) is formed between the inner annular water tube row (3) and the outer annular water tube row (4). A combustion device (6) is installed inside the lower pipe header (1).If desired,
This combustion device (6) can also be placed here by utilizing the space formed inside the lower header (2). In the figure, (7) is a combustion chamber formed inside the inner annular light blue row (3). Both ends of each water pipe of (4, i) (61, reduced diameter ff1li < (3), 4t, upper part 9' (odd 1° diagonal j3 side of (1)) −
1. Parts are also temporarily fitted into the tube of CE (2) and welded.

To the inner annular water 1', an opening (not shown) is provided in the flJ (3) over the passage 1'1, so that the combustion bar (7) communicates with the combustion scum passage (0). Salmon line up to the outer ring of water (
11) Is there a width of 1 in the total length to t? ilL < I
sI'')) is installed (in J, the combustion scum passage (5) and l:
V. Illustrated road map? : Connected so that combustion scum flows through the combustion gas passage (5) in the direction of water i17 (14
Completed t 6J, ku,; (,I ko, combustion scum/burn),)
"The self-cast name (5) may be configured to flow in the vertical direction. In the figure (one) is Wushing C.

There is a multi-tube member flow boiler as shown in 1 to 3, and in this explanation it is as shown in Figure 2. Onihi 1.4ru (1B
) through -(, soot 1f11 in the combustion residue passage (5)
The force of the vibrator (18) is set at 62 stages each time a shellfish is inserted.

'/J(ni,・Gland 4 removal method i;
Using the device described in 2), attach the nozzle to the tip 1). Remove the high perspiration water cleaning device from inside the guide vibe (111') and remove it from the combustion residue passageway (5) to the 7th floor, and remove the water pipe. 8
Wash? ￥lRir1.The nozzle should be installed so that the high-pressure water covers the horizontal direction (it is preferable to blow it).

By the way, in order to prevent the kite pipe (10) from burning out due to the combustion force, as shown in Fig.
It is desirable to scrape off the part covered with step 11) and make a thin layer of meat. In this way, the thermal stress will be concentrated at the wall thickness boundary Y', and it will burn down from there (', the part inside the lower pipe header (1) will break ii1.l-J No such accidents will occur.

As explained below, this invention (11) provides a method for easily removing soot from the combustion residue passage of a multi-tubular laminar flow point, which was previously considered impossible. .

4. Explanation to Drawing Simplification and 13 FIG. 1 is a longitudinal sectional view, FIG. 2 is a partially enlarged sectional view, and FIG. 3 is a further enlarged sectional view.

(1)...
・Upper root (1B)...Lower board (2)...
Annular water pipe row (4) of lower pipe header (3)...inner 1)
)...Outer annular water tube row (1))...Combustion residue passage (0)...;
3(;Furnace equipment (7)... Fuel A?15(7
)...... Reduced diameter part of water pipe (1))... Cushing (10)... Nojoid Vibe 5?1 [
No. 10-1-11/1

Claims (1)

[Claims] A combustion gas passage (5) is formed between the inner annular water tube row (3) and the outer annular water tube row (11), and the lower header 1! (
1) Upper 4fi (1A) d3 and lower &< I B
) through the shell, and using a soot removal device equipped with a vibrator (lO) to the guy 1 in the combustion gas passage (5), remove the nozzle at the tip (= J (high pressure water washing)) and remove the device from the kite. Vibrator (1
0) A multi-tube method for removing soot from small irritants, which is characterized by inserting it from the inside and cleaning the combustion scum passageway (5).