JPS6016207A - Evaporating type liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To provide a evaporating type liquid fuel combustion device comprising a evaporation chamber adapted to accumulate less amount of tar deposit, by retaining the temperature of vaporizing surface coated by an organic material decomposing film at its filmboiling level. CONSTITUTION:The inner wall of evaporation chamber 6 is entirely or partially coated with an organic material decomposing film 3 made of organic material decomposing catalyst 10 and a heat resistant bonding material 11. The catalyst 10 is made of a highly radiant material with a high temperature conductive characteristics. The material 9 composition is represented as follows; 15-50wt% carbon, graphite, beryllia, magnesium oxide, and zirconium boride, etc.; and for a material 10, 0.1-15wt% titanium, zirconium, vanadium, chrome, alumina cement and calcium carbonate etc.; while for the bonding material 11, 40-80wt% water-soluble phosphate, water-soluble silicate and silicone-based paint, etc. Where an inferior quality fuel 1 rich in non- volatile tar-forming components 12 is evaporated inside a device having such a evaporation chamber by retaining the temperature of evaporation surface at its filmboiling level, the volatile components of fuel are evaporated very rapidly by the presence of high temperature conductive and highly radiant material 9 in the film. The shortened time of volatile components remaining on the film serves to produce less amount of tar. The organic material decomposing catalyst serves to decompose the non-volatile components by an oxidation decomposition, whereby reducing the amount of tar being produced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vaporizing liquid fuel combustion device that is widely used in heaters, cookers, etc., and particularly relates to a vaporizing chamber that causes a 011 problem when tar accumulates. It is something.

Structure of the Conventional Example and Its Problems The vaporizing chamber of the conventional apparatus was made of metal or a metal hill coated with a heat-resistant film. However, in the conventional device, i
There was a problem with tar accumulating on the walls of the vaporization chamber, causing white smoke and odor when igniting and extinguishing the fire.

OBJECTS OF THE INVENTION It is an object of the present invention to solve these conventional problems and to provide a vaporizing type liquid burning and burning device that includes a vaporizing chamber with little accumulation of coolant.

Structure of the Invention In order to achieve this object, the present invention covers all or part of the wall of the vaporization chamber with an organic matter decomposition film made of a material with high thermal conductivity and high flux resistance, an organic matter decomposition catalyst, and a heat-resistant binder. By maintaining the temperature of the membrane portion W4, the thermal effects of heat transfer and radiation are reduced, as well as the accumulation of catalytic activity.

DESCRIPTION OF EMBODIMENTS One of the main components of the vaporization chamber wall coating of the present invention is a fine powder*1 with high thermal conductivity and high flux resistance, and contains carbon, graphite,
It may contain 15 to 50% by weight of at least one insert selected from the group of beryllium oxide, mak7ium oxide, silicon carbide, vanadium carbide, tank sten carbide, titanium carbide, boron nitride, and zirconium poride. It's a must.

The second main component is an organic matter decomposition catalyst, including titanium,
Zirconium, vanadium, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, and rare earth oxides, elemental platinum P and palladium,
- It is necessary to contain 0.1 to 15% by weight of at least one selected from the group of activated clay, zeolite, calcium silicate, alumina cement, and potassium charcoal. Furthermore, the third main ingredient is a heat-resistant binder.
Water-soluble phosphate, water-soluble silicate, silicone paint l
! It is necessary to contain 40 to 80% by weight of one selected from Y.

FIG. 1 shows the principle of the apparatus of the present invention, in which liquid fuel 1 is ejected together with air 2, vaporized on a heating vaporization surface 3, and the mixed residue is formed into a combustion slag flame 5 in a burner head 4.

6 is a metal vaporization cylinder made of UL aluminum, stainless steel, aluminum-treated steel plate, etc., 7 is an electric heater for heating the vaporization cylinder, and 8 is a temperature detection element. The temperature of the vaporization surface 3 is detected by the inspection element 8 at the beginning of combustion, by the electric heater 7 at the time of combustion, by the conduction heat from the stunner head 4 during steady combustion, and by the combustion u1: film boiling by recovering exhaust heat from the gas. Hold at temperature. During steady combustion, the electric heater 7 acts as an auxiliary heat source.

Figure 2 ij: This is a partially enlarged view of the vaporization chamber, and the coating 3 consists of a highly thermally conductive and highly radiation material 9 (indicated by x), an organic substance decomposition catalyst 10 (indicated by ○), and a heat-resistant binder 10 (indicated by diagonal lines). ).

In an apparatus having such a vaporization chamber, the temperature of the vaporization surface is maintained at the temperature of the membrane part 1, and the non-volatile component 12 (Δ
When vaporizing a bad liquid fuel 1 containing a large amount of gas (represented by Volatile components of (moe) vaporize in a short time, shorten the residence time in the film, and reduce the amount of tar.Also, when the thermal conductivity of the film increases, the liquid fuel raises the film part III and becomes spherical. Since the non-volatile components are vaporized while forming a film and moving, the area where non-volatile components accumulate increases.This reduces the load on the organic matter decomposition catalyst that inhibits the decomposition of non-volatile components, thereby reducing tar production.

Even if the film has high thermal conductivity such as aluminum, if there is a low-resistivity metal in the film, the liquid (Kinenzai 1 is film N1;
It causes vaporization, but the vaporization time is slow! J Mogetsu no Kyutsu GF N coarsening occurs and has a negative effect on combustion.

Organic matter decomposition catalysts reduce tar formation by oxidative decomposition, partial oxidative decomposition, or thalassoginking of non-volatile light components that cause tar.

The heat-resistant bonding material has high thermal conductivity and lf'? +Fujija'
l F4 A material necessary for adhering I+ and the organic matter decomposition catalyst to the vaporization cylinder.

The main materials are water-soluble phosphate, water-soluble silicate, and silicone-based paints, but it is necessary to achieve complete curing and shorten the curing time (j A filler is used to ensure film properties such as water resistance.The film composition is a material with high thermal conductivity and high resistance to moisture, and the higher the content of organic decomposition catalyst, the higher the content of heat-resistant binder. The smaller the amount, the smaller the amount of tar produced, but it is necessary to add 40 to 90% by weight of the heat-resistant binder to ensure adhesion to the vaporizer cylinder and skin strength.

This will be explained below using the example of FJ wife.

For now, a conventional example will be explained.

(1) Regarding devices coated with conventional heat-resistant films, is the filling a silicon-based heat-resistant binder containing ferrite? It's been a long time since I last used it. The structure is the same as that shown in Figure 1, and the inner diameter of the vaporization chamber is 40mm and the crystallinity is 30mm, which is made of aluminized steel plate with a thickness of 1.6mm, and a heat-resistant coating is coated on the wall of the vaporization chamber with a thickness of 3mm thick.
It is coated with μ. 20 of the film in this example
The weight per square meter at 0°C is 0.80, and the thermal conductivity is approximately 0.8.
Kcat/mh °C.

In this device, a 1 m vaporizer cylinder is heated using a heater and combustion heat.
The temperature is 350℃, and the non-volatile components that cause tar are
2.8 tits of bad kerosene containing 7.5 ppm, air volume 5.3 Nn? When the tar was sprayed and vaporized at a rate of /Hr and the amount of accumulated tar was measured over time while being combusted, a characteristic line 1 shown in FIG. 3 was obtained. Approximately 300 cm of tar is expected to accumulate in 1000 hours, and it is expected that tar north of 12 will accumulate in 15,000 hours, resulting in an increase in odor, hydrocarbon, and acid carbon emissions during ignition and extinguishing, which is not a desirable result for a combustor. becomes.

Since this conventional coating has low thermal conductivity, kerosene vaporizes by nucleate boiling near the collision surface, causing tar to accumulate there.

Next, an example of the present invention will be explained.

(2) An organic substance decomposition film of film group μ after firing was formed on the same vaporizing cylinder as in the example of (1) above.

It is composed of aluminum phosphate, sodium phosphate as a hardening agent, and alumina as a filler.

The weight of this film over 200 tons is 0.90.

As a result, characteristic line 2 shown in FIG. 3 was obtained.

Approximately 4.37 nt of tar was accumulated in 1000 hours, and 1
Even after 5,000 hours, it is expected to be extremely small at about 6 my.

Since the film of this example had high thermal conductivity, kerosene caused film boiling at 300° C. or higher and was vaporized over the entire bottom surface of the vaporization chamber.

(3) As shown in Figure 4 and Figure 5, in a vertically shaped vaporizing chamber, the kerosene collision surface is covered with metal, and the other surfaces are coated with the same film as in the example in (2) above. ) When all changes over time in the amount of accumulated tar were measured under the same conditions as in the example (2), characteristic line 3 shown in FIG. 3 was obtained.

Approximately 3°2 of tar accumulated on the bottom of the vaporization chamber in 1000 hours.

(4) On the same vaporizer as in the example (1) above, the film composition after firing is 20% by weight of beryllium oxide, the organic matter decomposition catalyst is alumina cement), and the phase and semi-bonds are 70% by weight. B) A biodegradable film was formed. In this example, the bond is composed of sodium silicate as the main material and silica as the filling material. The weight of this film at 200° C. is 0.82, and the thermal conductivity is about 10 Kcal/mh'c. When the change in the amount of slag tar over time was measured under the same conditions as in example (1), characteristic line 4 shown in FIG. 3 was obtained. Approximately 12Tn9 in 1000 hours
of tar accumulated on the bottom of the vaporization chamber.

(5) The same vaporizing cylinder as in the example (1) above has a film composition after firing of 23% by weight of graphite, 76.8% by weight of cloudy composite material,
An organic matter decomposition film having a thickness of about 30 μm was formed which supported 0.62% by weight of platinum as an organic matter decomposition catalyst.

The conventional bonding material in Example 2 is mainly composed of aluminum monosulfate (1), sodium phosphate as a hardening agent, and alumina as a filler. The P ratio of this film at 200°C is 0.81, and the thermal conductivity is about 7 Kcat/mh'C.

When the change over time in the amount of accumulated tar was measured under the same conditions as in example (1), characteristic line 5 shown in FIG. 3 was obtained.

Approximately 13 mg of tar accumulated on the bottom of the vaporization chamber in 1000 hours.

(The same vaporizing tube as in the example in 61J 2 (1) has a film composition of 23% by weight of graphite, 10% by weight of manganese dioxide.
I J with a thickness of about 30μ made of 11 parts M67% by weight
A rock decomposition film was formed. The 14-bond material in this embodiment is composed of 1-lium phosphate such as a primary aluminum phosphate hardening material on the main side and alumina on the filling side. At 200'C, the thermal conductivity of this film is 0.83 to the car, and the thermal conductivity is approximately 8 Kcal/mh.
It is C. When the change in the amount of accumulated cool over time was measured under the same conditions as in example (1), the result was a cow sex line 6 shown in FIG.

Approximately 40 mg of tar was deposited on the bottom of the vaporization chamber in 1000 hours.

(7) 23% by weight of graphite, zeolite) [Ca(Na+
K ) a・Al-6s i 30072: ] 88% by weight activated clay [At2Si1 29] 2 9] 2 Ho combined goods 67% by weight 1! ? An organic matter decomposition film with a thickness of about 30 μm was formed.

The bonding material in this embodiment is composed of dibasic aluminum phosphate as the main material, 1-lium phosphate as the hardening material, and alumina as the filler. The resistance to vehicle of this film at 200℃ is 0.83, and the thermal conductivity is approximately 6.
Kcat/mh'C.

Under the same conditions as in the example (1), 1 piece of tar 1 piece 11,
- The characteristic line 7 shown in FIG. 3 was obtained for measuring the change.

Approximately 5 zmg of tar was deposited on the bottom of the vaporization chamber in 1000 hours.

(8) The skin 11 after firing is placed in the same vaporizing cylinder as in the example of (1) above.
As Tsumi 11 composition, an organic matter decomposition film having a lurity of about 30/l was formed from 20% by weight of zirconate, 13% by weight of mankane dioxide, and 67% by weight of 44 binder. In this embodiment, the structure 4 bond f': A' Fi is composed of silicone resin as the main material and ferrite 1- as the filler. The basic rule and key point of this film at 200℃ is 0°8.
1. Thermal conductivity is approximately 6 Kcat/mh'C.

When the amount of accumulated tar was measured under the same conditions as in Example (1), the characteristic line 8 shown in FIG. 3 was obtained.

Approximately 11C1y of cool was accumulated on the bottom of the vaporization chamber in 1000 hours.

(9) In the same vaporizing cylinder as in the example (1) above, an organic material decomposition film consisting of 20% by weight of silicon carbide, 10% by weight of calcium silicate, and 70% by weight of free-bonded nanocarbons after firing was applied. Formed. In this embodiment, the bovine gastrointestinal bond is made of sodium silicate as the main material and filled with silica.

This coating has a coefficient of resistance of 0.80 at 200°C and a thermal conductivity of approximately 4 Kca7/mh°C.

When the change in the amount of stored coolant over time was measured under the same conditions as in example (1), a characteristic line 9 shown in FIG. 3 was obtained.

Approximately 140++y of tar was accumulated on the bottom of the vaporization chamber at 111A at 1000 hours.

According to the present invention, it has high thermal conductivity and iv6
Coated with an organic decomposition film consisting of a radiation material, an organic decomposition catalyst, and a heat-resistant bond, the vaporization surface is coated with a film/dl.
By maintaining the temperature at an elevated temperature, a vaporizing liquid fuel combustion device with extremely little tar accumulation can be created.

[Brief explanation of the drawing]

Figures 1a and 1b show the vaporized liquid fuel I1 of the present invention. 1 side view P and a sectional view showing one embodiment of the FF6 burning device, 21st YI is a partial enlarged sectional view + figure of the vaporizing chamber in 2 of the same device, and 3rd figure is a characteristic showing the relationship between combustion time and accumulated tar amount 4A and 4B are a top view and a sectional view of another embodiment of the present invention, and FIG. 4 is a partially enlarged sectional view of the vaporizing chamber in the same apparatus. 3... Z conversion IJ11.7... Electric heater, 8... ii'u' as degree detection element 3, J,! Names of 11 people Ben Ushi Toshio Nakao and 1 other person 1st figure

Claims (1)

[Claims] (1) A vaporization system having a structure in which a vaporization surface coated with an organic decomposition film made of a highly thermally conductive and highly fused material, an organic decomposition catalyst, and a heat-resistant binder is maintained at a film boiling temperature. Liquid fuel combustion equipment. (2) 15 to 50% by weight of a material with high thermal conductivity and high radiation properties as an organic matter decomposition film, and 0.1 to 15% by weight of an organic matter decomposition catalyst.
The vaporized liquid fuel combustion device according to claim 1, comprising 40 to 80% by weight of the heat-resistant binder. (3) As a material with high thermal conductivity and high flux resistance, carbon,
Graphite, beryllium oxide, maxilum oxide, silicon carbide, vanadium carbide, tungsten carbon)
The vaporized liquid fuel combustion device according to claim 1, which includes at least one selected from the group consisting of titanium carbide, boron nitride, and zirconium polide. (41 As an organic matter decomposition catalyst, titanium, zirconium,
oxides of vanadium, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, and rare earths, elemental platinum and palladium, activated clay, zeolite, calcium silicate, alumina heptamentum, and potassium carbonate. (The vaporized liquid fuel combustion device according to claim 2, which includes one or more types selected from the engineering field)
. (5) Heat-resistant bond is 7iY of water-soluble phosphate paint, water-soluble silicate paint, and silicone paint! 11. The vaporized liquid fuel 1 combustion device as claimed in claim 2. (6) Vaporization chamber 2 with electric heater and temperature detection element! +1
The vaporized liquid fuel combustion apparatus according to item 1 of subsection 9.h of claim 1, wherein the liquid fuel combustion apparatus is configured to maintain the liquid fuel at a film boiling temperature.