JP2007285689A - Small melting furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and inexpensive melting furnace with low running cost, capable of adapting to a proper environmental standard, having a melting temperature of 1,700°C or more, and capable of recycling incineration waste. <P>SOLUTION: A separate type high temperature high speed turbo jet burner having high combustion performance and being the small melting furnace is installed. It is composed such that melted waste can be converted into slag and recycled by providing heating performance in the small melting furnace, and providing a structure acting as a secondary combustion chamber in a primary combustion chamber. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

Detailed Description of the Invention

The present invention mainly relates to a small melting furnace having a structure and performance capable of melting various kinds of waste and adapting to environmental standards for various kinds of waste in a serious situation. Is.

Technical background

Conventionally, the melting facility of the waste treatment facility is a large facility, and the construction cost of the melt treatment facility requires a huge amount of money, and the running cost also requires a large amount of cost.

In addition, the large-scale melting treatment facility takes many years in terms of licensing, and it is not easy if it is a new installation, and even if the installation plan for the treatment facility is implemented, it cannot be approved due to opposition from local residents etc. In some cases.

Asbestos, which has become a serious social problem, is now an urgent issue regarding how to treat it, since more than 1 million tons will be discharged every year.

At the National Assembly on February 4, 2006, it was announced that asbestos would be melted. According to estimates from the Ministry of the Environment, waste management-type disposal sites nationwide do not receive asbestos. It will be full in 4 and a half years.

In addition, there are only 15 melting treatment facilities nationwide with a processing temperature of 1,500 ° C., and asbestos processing experiments were conducted at a major melting furnace manufacturer. , 700 ° C melt processing temperature is required.

Problems to be solved by the invention

The present invention has been made in view of the various aspects as described above, is small in size, has low purchase costs and low running costs, has a simple installation permission, can meet appropriate environmental standards, and has a structural function 1 The purpose is to provide a small melting furnace that realizes a melting processing temperature of 700 ° C. or higher and can recycle incineration waste.

Means for solving the problem

The present invention provides a small melting furnace according to any one of the following items (1), (2), (3), (4), (5), (6), (7), and (8). Thus, the above-mentioned problem is to be solved.

(1) A separate high-temperature high-speed turbojet burner having high combustion performance is installed on the right side from the front in a small melting furnace, and has a firebed area of less than 2.0 m 2 and an incineration capacity of less than 200 kg / h, and two primary combustion chambers. A small melting furnace comprising a secondary combustion chamber, wherein the primary combustion chamber also has the function of a secondary combustion chamber.

(2) The internal fire bed of the primary combustion chamber is a double fire bed, and has a structure for the purpose of secondary combustion of the combustion gas generated in the double fire bed. The small melting furnace as described in (1) above, which is characterized.

(3) The double fire bed is a radiation flame path of the separate high-temperature high-speed turbojet burner having high combustion performance installed on the right side from the front of the small melting furnace, and the radiation flame path The small melting furnace according to any one of (1) and (2) above, which also serves as an exhaust gas path to the secondary combustion chamber of the generated combustion gas as well.

(4) The double fire bed is installed on the right side from the front of the small melting furnace, and the radiant flame of the separate high-temperature high-speed turbojet burner having high combustion performance is swirled and concentrated inside the small melting furnace. The small melting furnace according to any one of (1), (2), and (3) above, characterized in that it has a structure aimed at directing.

(5) The upper firebed of the double firebed is capable of obtaining radiant heat with the synergistic effect of the flame heat of the separate high-temperature high-speed turbojet burner and the heat of treatment at the time of incineration or melting of the waste. (1) or (2) characterized in that it has a structure for maintaining the temperature and enabling the waste melting treatment to be continuously processed so that the waste melting treatment temperature can be achieved in a short time. ) Or (3) or (4).

(6) A highly refractory fire castable is installed in front of the radiant flame ejected from the separate high-temperature high-speed turbojet burner, and the radiant flame collides with the refractory castable, thereby achieving a dramatic radiant flame speed. (1) or (2) or (3) or (4) or (5), characterized in that it has a structure capable of dramatically promoting thermal decomposition or obtaining high combustion efficiency and combustion temperature. ) A small melting furnace according to any one of the above.

(7) The interior of the secondary combustion chamber is divided into three by a fire-resistant castable wall, and the exhaust gas passage is installed on the wall to ease the exhaust gas velocity, thereby promoting the secondary combustion effect of the exhaust gas. Small melting as set forth in any one of (1), (2), (3), (4), (5), or (6) above, characterized in that it has a structure that suppresses the emission of salt dioxins and fly ash Furnace.

(8) At the time of waste melting treatment of the small melting furnace, the temperature inside the small melting furnace is set to 1,700 in about one hour with only one type of the separate high-speed turbojet burner using kerosene as fuel. The small melting furnace according to any one of the preceding items (1), (2), (3), (4), (5), (6), or (7), which can be heated to ° C.

An embodiment of the present invention will be described below with reference to FIG. 1 or FIG.

1 and 2 are schematic cross-sectional explanatory views of an embodiment of a small melting furnace according to the present invention. FIG. 1 shows an external front view and a front internal view of the small melting furnace. FIG. 2 shows an internal plan view of the small melting furnace.

The small melting furnace is roughly divided into (1) primary combustion chamber, (2) separate high-temperature high-speed turbojet burner, (3) and (4) double firebed, and (8) batch type. It is composed of an inlet, (9) chimney, (10) slag outlet, and (12) secondary combustion chamber.

The feature of the embodiment of the present invention is that waste is introduced from the batch type inlet, and falls to the upper fire bed. After that, (2) separate type high-temperature high-speed turbo jet burner is ignited and, at the same time, (7) secondary blower is also operated.

The input waste is incinerated by the radiant flame of (2) separate high-temperature high-speed turbo jet burner, and during the melting process, the heat of waste treatment and (2) the radiant flame heat of the separate high-speed high-speed turbo jet burner are The radiant heat obtained by the synergistic effect can reach the melting processing temperature of 1,700 ° C. in a short time, and the synergistic effect can continuously maintain the furnace temperature and continuously carry out the melting processing of the waste. It becomes possible. The melted waste becomes slag and is discharged from the slag discharge port.

The combustion exhaust gas generated at the time of waste treatment passes between the double fire bed composed of (3) lower fire bed and (4) upper fire bed, and is attracted to (12) secondary combustion chamber.

That is, the generated combustion exhaust gas has the flame heat of 1,400 ° C. of (1) the primary combustion chamber, (2) the separate high-temperature high-speed turbojet burner, before the generated combustion exhaust gas is attracted to (12) the secondary combustion chamber. Dioxins and fly ash, which are harmful substances, are removed by passing through the radiant flame. Therefore, (1) in the primary combustion chamber, (12) also serves as a secondary combustion chamber.

The combustion exhaust gas passes through the radiant flame having a flame heat of 1,400 ° C in (1) the primary combustion chamber, (2) a separate type high-temperature high-speed turbojet burner, and (7) attraction of the secondary blower. It is attracted to (12) secondary combustion chamber by the action.

The induced combustion exhaust gas is subjected to a recombustion treatment with heat of 1,000 ° C. in the (12) secondary combustion chamber divided into three by a refractory castable wall.

(12) The fire exhaust castable wall in the secondary combustion chamber is provided with a combustion exhaust gas passage (13). (13) The combustion exhaust gas velocity is reduced by the exhaust passage, thereby reducing the combustion exhaust gas velocity. It has the function of promoting the secondary combustion and re-burning effect of exhaust gas, and preventing the generation of harmful substances such as dioxins and fly ash.

Therefore, since it has the above structural function and principle role, dioxins and fly ash which are harmful substances are not discharged into the atmosphere.

In addition, the inside of the small melting furnace is made up of refractory castables, and the use of refractory castables for heat insulation makes it extremely safe, fireproof, and durable, and also conducts quantitative analysis of dioxins and dust. However, it is well below the standard value, so it is also adapted to environmental standards.

The invention's effect

According to the present invention, it is possible to deal with the waste problem that is becoming serious today, and since the melting treatment facility has a very low purchase cost and running cost, it can be supplied to a wide range of fields.

Industrial application fields

The present invention is primarily concerned with incineration and melting of waste.

It is the external appearance front view and front internal view of the small melting furnace which concern on this invention. It is an internal top view of the small melting furnace which concerns on this invention.

Explanation of symbols

▲ 1 ▼ Primary combustion chamber ▲ 2 Separate high temperature high speed turbo jet burner ▲ 3 Lower firebed ▲ 4 Upper firebed ▲ 5 Furnace wall fireproof castable ▲ 6 ▼ Primary blower ▲ 7 ▼ Secondary blower ▲ 8 ▼ Batch Type inlet ▲ 9 ▼ Chimney ▲ 10 ▼ Slag outlet ▲ 11 ▼ Refractory castable ▲ 12 ▼ Secondary combustion chamber ▲ 13 ▼

Claims (8)

A separate high-temperature high-speed turbojet burner with high combustion performance is installed on the right side from the front in a small melting furnace. The primary combustion chamber and secondary combustion chamber have a firebed area of less than 2.0 m2 and an incineration capacity of less than 200 kg / h. A small melting furnace characterized in that the primary combustion chamber also has the function of a secondary combustion chamber. The internal fire bed of the primary combustion chamber is a double fire bed, and has a structure for the purpose of secondary combustion of the combustion gas generated inside the double fire bed. The small melting furnace according to claim 1. The double fire bed is a radiant flame path of the separate high-temperature high-speed turbo jet burner having high combustion performance installed on the right side of the small melting furnace, and not only the radiant flame path but also the combustion generated 3. A small melting furnace according to claim 1, which also serves as an exhaust gas passage to the secondary combustion chamber of gas. The double firebed has a structure intended to orient the radiant flame of the separate high-temperature high-speed turbojet burner having high combustion performance installed on the right side of the small melting furnace in a swirling manner in the small melting furnace. The small melting furnace according to claim 1, 2, or 3. The upper firebed of the double firebed maintains a continuous furnace temperature by obtaining radiant heat with the synergistic effect of the flame heat of the separate high-speed turbojet burner and the heat of treatment during incineration or melting of waste. Furthermore, it has a structure that makes it possible to continuously process the melting treatment of the waste so that the melting temperature of the waste can be reached in a short time. Or a small melting furnace. A highly refractory fire-resistant castable is installed in front of the radiant flame ejected from the separate high-speed high-speed turbo jet burner, and the radiant flame collides with the refractory castable, and a dramatic radiant flame speed, The small melting furnace according to any one of claims 1 or 2, or 3 or 4 or 5, characterized in that it has a structure capable of promoting rapid thermal decomposition or obtaining high combustion efficiency and combustion temperature. The inside of the secondary combustion chamber is divided into three by a fire-resistant castable wall, and the exhaust gas passage is installed on the wall to reduce the flow rate of the exhaust gas speed, thereby promoting the secondary combustion effect of the exhaust gas and dioxins The small melting furnace according to claim 1, further comprising a structure for suppressing discharge of fly ash and the like. At the time of waste melting treatment of the small melting furnace, the temperature inside the small melting furnace is increased to 1,700 ° C in about one hour with only one type of the above-mentioned separate type high-temperature high-speed turbojet burner using kerosene as fuel. The small melting furnace according to any one of claims 1 or 2, or 3 or 4, or 5 or 6 or 7, wherein heating is possible.

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