JPS61114008A - Soot blower device - Google Patents

Abstract

PURPOSE:To prevent the loss of energy and the waste of a water supply treatment cost by a method wherein the mixing fluid of water steam generated by the direct injection of water into high temperature and high pressure combustion gas and combustion gas, is utilized. CONSTITUTION:The high pressure combustion chamber 2 of the mixing fluid generator 1 of the water steam and the combustion gas has the pressure of 10-20kg/cm<2>, fuel and high pressure air are injected into this combustion chamber from a burner 3. When a combustion is completed at the high temperature of 1,500-1,800 deg.C in the combustion chamber 2 thereof, the combustion gas arrives to a next water injection chamber 4. Here, The water injected from a water injection pipe 6 is evaporated by the combustion gas, and the temperature of the gas itself is decreased gradually while it becomes the proper mixing fluid of the water steam and the combustion gas, then, enters into a drain separating tank 8. The mixing fluid becomes complete gas and is leaded to the soot blower 17. According to this method, the loss of the energy may be prevented and the wast of the feed water treatment cost may be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a soot blower device that is an auxiliary device to a boiler.

BACKGROUND OF THE INVENTION In conventional suit blower equipment, the injection medium used in the boiler and suit blower is generally used by branching the main steam at the boiler outlet, extracting air from the middle part of the super heater, or in some cases using boiler steam as the injection medium. Saturated steam is led from the drum and used as an injection medium for suit blowers.

The injection medium used in these suit blowers is 1
Steam or compressed air of about 0 to 20 #/, 19 is used, but when steam is led from boiler 2, it reaches 5 to 6 tons/71 with one suit blower, and in a large capacity boiler, it can be used at the same time. In some cases, three or four suit blowers are used to blow the fluid. Furthermore, in the high pressure boiler, high pressure steam of ioo~150 qq7. I
It is used after reducing the pressure to S).

Problems to be Solved by the Invention In this way, taking the trouble to reduce the pressure of high-pressure steam for use in a suit blower results in a large loss of energy and also releases a large amount of high-quality pure water used in the boiler. This results in wasted water treatment costs.

In order to solve these problems, large thermal power plants use small general-purpose boilers (with a pressure of 10 to 20
However, the present invention aims to provide an alternative to a small general-purpose boiler dedicated to this suit blower.

Means for Solving the Problems According to the present invention, a soot blower device is provided with a steam/combustion gas mixed fluid generator, which is used as an injection medium generation source for the soot blower.

This mixed fluid generator mixes and agitates high-pressure, high-temperature combustion gas and injection water to evaporate the injection water, thereby raising the high-temperature gas to an appropriate temperature (300 to 400℃) as the injection medium for the suit blower.
The temperature is reduced to approximately 00°C) and a so-called water vapor/combustion gas mixed fluid is produced.

In other words, the soot blower device according to the present invention uses, as the injection medium of the soot blower, a mixed fluid of water vapor and combustion gas, which is generated by directly injecting water into high-temperature, high-pressure combustion gas burned in a high-pressure combustion chamber. be.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

1 FIG. 1 shows an outline of a soot blower device according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a water vapor/combustion gas mixed fluid generator, 2 is a combustion chamber, 3 is a burner, 4 is a water injection chamber, and 5 is a combustion chamber.
1 is a thermal shock prevention device for a water injection chamber, 6 is a water injection pipe, 7 is a water injection pump, 8 is a drain separation tank, 9 is a mixed fluid outlet pipe, 10 is a high pressure air reservoir, 11 is a near compressor, 12 is a 13 is a fuel injection pipe, 13 is a combustion high pressure air injection pipe, 14 is a mixed fluid reservoir, 15 is suit blower piping, 1
6 indicates a boiler, and 17 indicates a suit blower.

Next, its effect will be explained.

The high pressure combustion chamber 2 of the steam/combustion gas mixed fluid generator 1 is 1
0 to 20ψ-9, fuel (liquid or gaseous) and high pressure air are blown into this from the burner 3.

When combustion is completed in this combustion chamber 2 at a high temperature of 1500 to 1800°C, it moves to the next water injection chamber 4, where
While the water injected from the water injection pipe 6 is evaporated, the temperature of the combustion gas itself is gradually lowered and the temperature is gradually reduced to an appropriate amount of water vapor.
- The combustion gas becomes a mixed fluid and reaches the drain separation tank 8.

At this time, since this mixed fluid is controlled at 300 to 400 °C, most of the fine water droplets evaporate, and there is almost no drainage, but it becomes a complete gas in this tank 8,
It will lead you to suit blower 17.

FIG. 2 shows another embodiment of the soot blower device according to the present invention.

In Fig. 2, water vapor and
A portion of the combustion gas mixture fluid is directed from the drain separation tank 8 to the gas expander 18 . A portion of this mixed fluid is used by the gas expander 18 as a driving source for the compressor 19 of high-pressure combustion air supplied to the mixed fluid generator 1 .

Also, the mixed fluid that is not guided to the gas expander 18 is used as an injection medium for a soot blower (not shown) in the same manner as in the above embodiment.

Note that only one mixed fluid generator 1 is shown in both Figures 1 and 2, but if the amount of jetting medium used by the soot blower increases, two or three or more units may be combined. Of course, it is possible.

Effects of the Invention Since the soot blower device according to the present invention has the configuration described above, it has the following effects.

First, in a boiler called a boiler, 100% of kerosene
The steam on the 10th to 20th floors-9 that can be generated by combustion of 0.1 vh is approximately 12 to 13 t/11, whereas the steam/gas mixed fluid thus obtained is more than aot/)1.

On the other hand, in order to obtain a steam/gas mixed fluid of 12 to 13 t/IN, which is the same as in a normal boiler, the fuel required is only about 400 kV11 in the case of the above-mentioned kerosene.

In other words, the thermal efficiency is more than twice that of a normal boiler.

Also, while boilers normally use air at atmospheric pressure, this device must use compressed air of 10 to 20ψd9, but we are currently using a 10ψ-9 near compressor. If so, even considering the power cost required for this, the amount of fuel used will be 30 to 4 times lower than that of a normal boiler.
0% less.

A further advantage is that the water injected into the combustion gas can be of the same quality as ordinary industrial water.

A schematic diagram showing the male side, and FIG. 2 is a schematic diagram showing another embodiment.

1. Steam/combustion gas mixed fluid generator, 2. High pressure combustion chamber, 4. Water injection chamber, 6. Water injection pipe, 8. Drain separation tank, 17 fists, suit blower, 1°811. Gas expander, 19...compressor.

Claims (1)

[Claims] A soot blower device that uses a mixed fluid of water vapor and combustion gas generated by directly injecting water into high-temperature, high-pressure combustion gas burned in a high-pressure combustion chamber as the injection medium of the soot blower.