JPS58150707A - Improved metallic burner - 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 designed to produce a continuous flow of at least 100,000 high-temperature combustion gases for producing a continuous flow of 9 metal/9-ner combustion gases. The gas stream decomposes the hydrocarbon feed due to the heat carriers generated, for example in the high water combustion zone. So-called “Advanced Cracking Reactor (Advanced OrmekmgRes+)”
It is particularly useful for the effective utilization of fuel valuables and the protection of metal materials in environments where Kli is continuously generated.

The high-temperature gases roared as they manipulated the burning parts.
Suppressing the angle l1ft is a difficult problem. As used herein, the term fuel tanker refers only to the metal portion that supplies fuel and oxygen to the combustion chamber, and not the entire assembly. Because the Mukuro Nouner is made of metal rather than refractory material, it does not allow mosquitoes/mosquitoes to reach levels below the level required to maintain the integrity and operability of the Nounner. - must be maintained. As a means conventionally adopted for such high m/9-ner combustion mass assembly parts, it is necessary to adjust the medium combustion conditions.
(i13. conduction or convection removal of heat from the burner and from the refractory material in contact with the scissor burner; and/or refreshing radiation onto the This includes adjusting the geometry of the assembled parts to reduce the amount of energy. However, there are always inherent limitations and drawbacks to these conventional means, i.e. It is often preferred to achieve a lagoon f.

In short, the present invention relates to an 11 degree reduction in metal/saner rather than flame 1iit. Heat removal by conduction and convection from the burner or the refractory material in contact with it may not be adequate. This is because large temperature gradients still occur within the bulk of the inner material.

and in all cases, such heat removal often means energy losses and inefficient use of fuel values. Alternative considerations generally exist that place practical limits on the degree of geometrical adjustment that can be made to the panorama assembly components.

Therefore, there is a great need for a means for controlling the 9-ner density. This means, for example, that the hydrocarbon feedstock is separated into heat carriers produced in the combustion chamber upstream of the hydrocarbon feed port.

This is true in the case of the Advanced Clara Young Reactor (AO Phantom) where the heat carrier rate often reaches 2G00151 or more.In fact, the adiabatic flame temperature can be around 3000°C or even higher depending on the combustion conditions. This happens often.

In contrast to the conventional means described above for controlling metallurgy in high-temperature/9-s-1 combustion collector components, the present invention provides
By means of a reflective coating on the inner surface of the /9-ner facing the interior of the /? -naiit
To provide a fifth means for reducing the damage and maintaining the integrity and operability of the /9-ner. The remains of the /9-ner's scissors structure! @ at least 0.50. More preferably, it is coated with a reflective metal having a reflectivity 1 of at least O, SO, and most preferably at least 0.90.

The present invention has a high value of Il&, i.e. at least 1oooc
It has general applicability to metal/9-ner combustion assembly parts. The fIA of the present invention becomes more useful as the wettability K of the combustion gas increases above 1000°C.

Mark: A metal having a nozzle for supplying fuel ionic gas, a rounded means for conducting heat away from the underarm metal to the fluid, and a metal/? - (11) one end of which is the metal/
The inner surface of the metal burner facing the interior of the combustion chamber has a reflectance of at least O, SO, more preferably at least 0
．． 80, most preferably at least xOo01c coated with a layer of reflective metal having at least 0.90
A continuous flow of Oi1111 combustion gas is generated to produce a continuous flow of gases. The above-mentioned tinting reduces heat loss due to the scissor metal saner. Because wi=-ting is/
? This is because it increases the reflection 'N fraction of the radiation that is centered on the -ner and decreases the percentage of the radiation 011L collected by the/arner. Kll coating thus contributes to more efficient use of fuel valuables and -9-
Nertuft, <not to prevent reaching high-Kll than K/? - Preserves the material. The reflective coating reduces the amount of radiant energy that is present on the metal/panel (by reducing the absorption of radiant energy coming from the flame and room surfaces). The lower the metal once, the less strain the metal has, the higher the strength of the metal, and the lower the overall heat loss from the IIAva leprosy.

The wrinkle reflective sooting should be highly polished to 5iII to maximize radiation reflection and minimize radiation absorption. The cough footing should be stable and should adhere well to the base metal.

As used herein, the term "reflectance" is defined as reflectance - 1 - total hemispherical emissivity. The term "global emissivity" is well defined in the art and is abbreviated as emissivity. For example, Chemical Engineers' Handbook, edited by R.N. Berry et al., published by McGraw-Hill, New Sori City, USA, 4th edition (1963), Vol.
Reference is made to page 34 of Chapter 0. Reflectance can be determined by standard procedures using a suitable radiation source, a photometric needle, and a probe. The emissivity of a metal surface varies depending on, inter alia, the surface condition of the wrinkled metal, the II degree of the metal, and the wavelength of the radiation impinging on the metal surface. refers to the value at 600°C. The emissivity is the spectral dispersion of the incident radiation.
distribution) is small.

FIG. 1 is a diagram of a typical metal burner as seen from the burner. The skeleton drawing shows twin concentric metal nozzles for fuel and oxygen, with cooling water pipes running through them.

FIG. 2 is a side cross-sectional view of the gold lI/N-ner of FIG. 1 showing the location of the reflective coating and the direction of fuel and oxygen flow.

1 and 2 are provided solely for the purpose of illustrating the invention. The number O1 is the metal part of the skeleton. The number 2 is the fuel pipe] and the number 3 is the oxygen ring. The number 4 indicates the cooling water pipe running through the /9-ner.

The numeral 5 indicates a reflective coating on the inner surface of the metal/tanner facing the interior of the fuel chamber (all times);
The number 6 indicates the direction of fuel and oxygen flow.

The /-ner in the present invention is made of metal. It is preferable to use heat-resistant and corrosion-resistant metals, especially when the 4HC'-n-na temperature is high.

A variety of stainless steels can be used for this purpose, including Kokomo, Indiana, USA;
Waist-neck Apennie's Charts) (0a
bot) Corporation, Stellite, Divisi Corporation, Hastelloy (trademark) X. It is a heat-resistant, corrosion-resistant alloy of nickel, chromium, iron and molybdenum.

The fuel tank has nozzles for supplying fuel and oxidizing gas. In the "advanced cranking reaction" it is preferred to use a fuel material that is a gas at normal temperature and pressure. If the fuel material is not normally a gas, it is preferable to preheat and IQ the bulk fuel before supplying it to the /9-ner. Even if the fuel material is a gas at ambient temperature, it may be preferable to preheat the fuel and oxidizing gas from a process economic standpoint. Examples of preferred fuels are light hydrocarbons such as methane and eta/. Methane is particularly preferred.

As used in the specification and claims section
Means under oxidizing gas and oxygen-free gas, or oxygen-containing gas such as air. When it is desired to obtain a higher temperature fuel #1 gas, the VC preferably uses oxygen as the oxidizing gas.

A preferred arrangement of nozzles is a concentric annular arrangement in which each narrower tube/nozzle is surrounded in a concentric arrangement by a wider tube/nozzle. Internal tube/
Fuel can be supplied through the nozzle and oxidizing gas through the external tube/nozzle, or vice versa. In order to explain an example of a concentric arrangement of nozzles in Figures 1 and 2, if there is a concentric arrangement of nozzles as described above,
Preferably, individual sets of concentric nozzles are provided in the tubesheet, spaced to such an extent that they are evenly spaced from each other. Concentric arrangements such as those described above are very effective for sufficient coupling between fuel vapor and oxygen, and therefore for efficient utilization of fuel values. However, it should be noted that although the term "fuel" is used in this specification and claims, the fuel is not always fully oxidized or completely dehydrated. For some economic and/or technical standpoints, the fuel may only be partially oxidized during combustion.

Because of the high temperature of the fuel, the Wrinkled Metal II tanker has a means of conducting heat away from the tank by using a fluid. An alternative method to achieve heat removal is to provide one or more cooling grooves inside the main body of the 9-ner. Water is a useful refrigerant that passes through cooling channels. Examples of the arrangement of cooling grooves are shown in FIGS. 1 and 2.

The inside of the fuel reflects the radiant energy that is centered on the inner surface of the tanker.
2, such reflective metal is coated with a reflective metal having a reflectance of at least 1L50, more preferably at least 1L50, and most preferably at least 40.90. It may be metal or metal-containing. Examples of highly reflective metals such as those described above that are suitable for the present invention include noble metals such as gold, platinum, and rhodium. Not only do these metals exhibit a high degree of reflectivity, but they are also chemically stable and corrosion resistant.

Gold is a particularly preferred material for the present invention. The anti-reflective coating OII must be highly polished to maximize the reflection of the radiation flux coming from the internal wall surfaces of the fuel gas and working wheels. By reducing the absorption of radiation by the ner, it has been observed that the nerar reduces the metal's toughness substantially; this reduces the strain in the metal, increases the strength of the metal, and increases the strength of the metal. This results in lower overall heat loss from the combustion system. That is, the present invention increases the reliability and operability of the high, R-ner and the overall economy of the combustion process.

The present invention generally provides that the combustion gas is at least
The present invention is useful when the temperature is 0°C.The present invention becomes more useful as the temperature increases.
R) Although this is the case in J, the present invention is concerned with its use V
rAORK related range s#C is not defined.

The subject of AOR is well known in the machine industry. It basically involves (1) continuous production of high temperature combustion gas in the combustion zone, and (M) cracking of the nm water bulk feed by using the combustion gas as a heat carrier. and (il- subsequent quenching of the produced proboscis).

An example of a critical essay on the subject of cough is Ho5oi.
) and Kelster's Ethyl
en from 0rude 051 (ethylene from IC oil), Chemical Engineering Progress $
Volume 1171, No. 11, pp. 63-67 (1975)
It is. Typically, the gas flow rate f in humans reaches approximately 2000°C.

In such situations, the /9-ner reflective coating of the present invention becomes particularly useful.

The reflective coating of the present invention can be used during continuous operation of the electrical assembly, provided that due care is taken to maintain favorable combustion conditions for the integrity of the reflective coating.
It was observed to remain in a shiny and highly reflective state. For example, methane is a preferred fuel because it has minimal tendency to deposit foreign matter such as soot O on the scissor reflective sooting.

Contamination with corrosive substances in the fuel should be avoided. The presence of the reflective coating on the inner oats and the presence of a continuous high velocity gas flow below the combustion galvanic erosion undoubtedly aids in preserving the wrinkled reflective coating.

The thickness of the reflective coating is typically 11500 rc.
The reflective layer is a solid base that is firmly adhered to the base metal.The present invention is not limited to the method of coating the reflective metal on the /9-chi. Various methods are known in the machine industry. Electroplating is one example.

Reflective layer and 1? It is also possible to provide another layer that forms between the metal and the metal.

When the reflective layer is gold, it is useful to provide a thin layer of radium as a scissors sandwich layer.

This is because radium strongly suppresses the diffusion of gold into the /9-ner metal substrate.

Since the inner walls of the 0w1 combustion chamber often reach very high temperatures, it is preferable to use a special high temperature resistant refractory material such as zirconia.

This applies to 41 degrees when the 11 degrees of fuel gas reaches about 200 QCK. The combustion chamber can be constructed of layers of several different refractory materials. Although there are no particular restrictions on the size and shape of the combustion chamber, the rc combustion chamber usually has an axis of symmetry.

The following examples are provided only to illustrate the present invention and should not be construed as limiting the scope of p1bookwI@.

Example 1 Combustion was carried out using metal-sener combustion wtiii assembly parts gold, and the temperature gf of the plated metal noner was compared. A study was carried out on the effect of plating the inner surface of the metal 9-ner facing the inside of the combustion chamber. Made of stainless steel Hastelloy(TM) The cross-sectional area of each internal nozzle at the tip is 32.2 m
"Actually, that of each external nozzle was 159.4 wm." An internal cooling groove is provided inside the main part of the metal burner. The groove had a convoluted tube around three sets of double concentric nozzles.

9. Let cooling water flow through the internal cooling groove. Fuel was supplied through an internal nozzle and oxygen was supplied through an external nozzle. The combustion chamber had a cylindrical shape with a length of 1.8 m and an inner diameter of 123 mm, and both ends of the combustion chamber were in the shape of an arm. Fuel composition (weight basis) is Hm 10.61! .

OH480, 6th grade, 01H4 and 0. H, 4, 7 regret,
With 0.01.5 sacs, 0.0.7 sacs and 1.9 sacs of Nl, the fuel O supply rate R is 249 lbs/II〉, and the oxygen O is 1006 lbs/hour. 3801C diluted steam t1 Armpit metal of the upper part of the wall of the combustion house -?
- A set of five injection tubes installed downstream of the 229 fin from the gnar [through 1698 lb/hr]
supplied. Adjacent to the periphery of the metal I sensor, it is provided vertically downward along its inner wall. -By feeding the m* house at a speed of 7 II/h, the scissors S*
A curtain of steam was formed around the top of the inner wall of the tank. The flow rate of cooling water in the corrugated metal tank was 110 lb/hr. Under this combination of conditions, the
The stoichiometric ratio of oxygen was 1.1, and the temperature of the adiabatic flame cascade was 1950°C at the completion of mixing of the p1 fuel, oxygen, steam curtain, and diluted steam iI. Inside the metal 9-ner, the ILF at a location 6 m away from the bottom and facing the combustion chamber was measured using a thermocouple in two states: one was the bottom of the 9-ner; One was coated with gold and the other was measured without gold plating.

In the former state, the emissivity was 0.35 because it was not a bright finish but a matte finish.

By modifying the gold plating technology, the surface reflectivity is 1.
This can also be dragged further. In the state without gold plating, it is the emissivity of the pN-nera surface.

was 0.50. The value of the carcass emissivity was measured by using an emissometer. The results for the above two shapes are summarized below; Emissivity 0.35 0.5 T, pR-ner bottom surface (extrapolated value) 232°C At 284°C, 6 degrees from the bottom surface (!I! measured value) 160 ℃ 204℃ In the above data, the base is extrapolated once and is a good value, this is π
On the other hand, the data at nine points 6 m from the bottom are actually measured values. The difference in bottom surface temperature between the two conditions is substantial] and clearly demonstrates the advantage of the reflective corting of the present invention.
The effectiveness of the p# reflective coating can be further revealed by using the Tinder technique. It should also be noted that the above experiment was a small-scale experiment.

The temperature of the metal alloy depends on the combustion conditions (type of fuel used, fuel supply rate and oxygen supply rate, mixing conditions between fuel and oxygen, amount of dilution steam, preheating of the fuel, etc.), combustion the large heat and configuration of the chamber, the emissivity of each internal surface of the combustion chamber and of the metal/ners, the removal of heat from the metal/ners by the cooling fluid, and at least a portion of the inner walls of the chamber; It goes without saying that the presence of an optional steam curtain for cooling depends on a number of factors. Therefore, the -variant f cannot be determined in any simple quantitative manner as a function of the reflectivity of the coating surface; however, as the size of the combustion chamber increases, the reflectivity It is generally true that the effect of the coating becomes even more significant.

This is due, inter alia, to the fact that as the combustion chamber becomes larger, radiant heat transfer from the flame to the metal/tanner becomes even more important than other heat transfer mechanisms.

That is, the reflective coating of the present invention has an industrial scale A
It becomes even more useful in large-scale operations such as OR.

In large-scale operations of human OR, various feeds such as dilute steam are used in the experiments described above.
It is also true that it is preheated to an even higher temperature than.

In large scale AORs, it has been predicted that a difference in emissivity of, for example, 0.03 to 0.5 can result in a difference in temperature of several hundred degrees between metals/navigators.

This ilf difference is very critical from the point of view of operational safety and economical operation.

[Brief explanation of the drawing]

Figure 1 shows an all-metal I-ner as seen from the fuel AV 1m. Figure 2 shows the metal in Figure 1/? - There is a cross-sectional view of the inner side. 5- 'l - Full-page engraving (no change in content) FIG, 1 Procedure correction lI (way W unit number F9
March 11, 1946, Commissioner of the Japan Patent Office, Meimoshi, Indication of the Kazujo-dono incident, 1944, Jil, Application No. 24, Reversal of title, Name of the person making the amendment, 4-IJy/1-j-
Relationship to the case: Applicant for single needle

Claims (1)

[Claims] (11(1) A metal nozzle having a nozzle for supplying fuel and oxidizing gas and means for fluidically conducting heat away from the metal nozzle; and (Saba) a combustion chamber made of refractory material with one end T-wire metal/9-ner bonded. A high temperature metal burner combustion assembly, characterized in that the reflective metal is coated with a reflective metal having a reflectivity of at least 0.80. The high temperature metal nozzle and combustion chamber assembly component according to claim 1). (3) The high metal part according to claim 1, wherein the reflective metal has a reflectance of at least 0.90. /S-Suichiichien@kei assembly parts. (4) Claim 8 (1) in which the reflective metal is gold.
) to (3), the 14-gata metal zR-ner fuel-electric assembly parts described in any of the items listed in (3) and lii. (5) A high-temperature metal collection component according to any one of claims (1) to (3), wherein the nozzles are arranged in a double concentric arrangement.