RU2406026C1 - Recuperative burner - Google Patents

Abstract

FIELD: power industry. ^ SUBSTANCE: recuperative burner consists of housing with air supply duct, casing located around the housing so there formed is annular gap for exhaustion of combustion products into waste-gas flue and combustion chamber that includes fuel supply pipe from the header to the nozzle. Combustion chamber is equipped with the first perforated shell and the second shell that are installed in the housing with the corresponding annular gaps. The casing is equipped with the third perforated shell, the first and the second shell are installed coaxially between the housing and the third perforated shell. ^ EFFECT: increase of fuel combustion economy by way of heat recovery level increase. ^ 2 cl, 1 dwg

Description

The invention relates to a device for burning combustible gas and can be used in industrial furnaces.

A recuperative burner is known that comprises a housing with an air supply pipe, a casing placed around the body to form an annular gap for exhausting combustion products into the smoke channel, and a combustion chamber including a fuel supply pipe from the manifold to the nozzle / SU 1684570, 1991 /.

Known recuperative burner has low fuel combustion efficiency.

The objective of the invention is to increase the efficiency of fuel combustion by increasing the degree of heat recovery.

Another objective of the invention is to reduce harmful emissions by organizing distributed combustion and afterburning of products of incomplete combustion.

To solve these problems, a regenerative burner is proposed that includes a housing with an air supply pipe, a casing placed around the body to form an annular gap for the removal of combustion products into the smoke channel, and a combustion chamber including a fuel supply pipe from the manifold to the nozzle.

The combustion chamber is provided with a first perforated shell and a second shell, which are installed in the housing with corresponding annular gaps, the casing is provided with a third perforated shell, the first and second perforated shells are aligned coaxially between the housing and the third perforated shell.

The housing, the first, second and third perforated shells form the channels for supplying cold air, heated air and heated air.

The invention is illustrated in the drawing.

The regenerative burner includes a housing 1 with an air supply pipe 2, a casing 3 placed around the housing 1 with the formation of an annular channel 4 for removal of combustion products, and a combustion chamber 5 provided with a manifold 6 with a pipe 7 and a nozzle 8 for supplying combustible gas - fuel.

The combustion chamber 5 is formed by a first perforated cylindrical shell 9, a second cylindrical shell 10 and a third perforated cylindrical shell 11.

The shell 10 and the perforated shell 11 are mounted coaxially between the housing 1 and the perforated shell 9.

The shell 10 and the perforated shell 11 form a channel 12 for supplying cold air.

The cylindrical wall of the housing 1 and the perforated shell 11 form a channel 13 for supplying heated air.

The first perforated shell 9 and the second cylindrical shell 10 form a channel 14 for supplying heated air.

The casing 3 is made of two coaxially arranged non-perforated shell 15 and perforated shell 16 with the formation of the channel 17, to which the pipe 18 of the secondary air coming from the air manifold 19 is connected through the channel 20 formed by the shell 21 and the shell 22.

A perforated annular flange 23 is installed in the channel 20 for supplying secondary air to the ejection of combustion products through a chimney 24 formed by the shell 21.

The burner operates as follows.

Air through the pipe 2 enters the channel 12, from where in the form of a system of perpendicular jets through the perforated shell 11 is directed to the housing 1, which is a heating surface.

In this case, the heat transfer coefficient on the surface increases by an order of magnitude compared with the heat transfer coefficient in longitudinal motion.

Further, moving along the channel 13 and heating from the housing 1, the air enters the channel 14, from where it passes through the system of holes of the perforated shell 9 into the combustion chamber 5, where it is mixed with combustible gas entering through the nozzle 8, and distributed combustion due to portioned supply air through the hole system of the perforated shell 9.

This sequence significantly reduces the concentration of nitrogen oxides generated during combustion.

The combustion products enter the working space of the furnace. Exhaust combustion products due to the vacuum created in the pipe 24, enter the smoke channel 4, where they are exposed to perpendicular jets of air entering through the perforated shell 16 of the casing 3.

As a result, there is a significant increase in heat transfer from combustion products to the surface of the housing 1.

At the same time, afterburning of products of incomplete combustion coming from the working space of the furnace, for example, with low-oxidative heating, which significantly reduces the toxicity of emissions, can occur.

Claims (2)

1. A regenerative burner comprising a housing with an air supply pipe, a casing placed around the body to form an annular gap for exhausting combustion products into the smoke channel, and a combustion chamber including a fuel supply pipe from the manifold to the nozzle, characterized in that the combustion chamber is provided with a first perforated shell and a second perforated shell, which are installed in the housing with corresponding annular gaps, the casing is equipped with a third perforated shell, the first and second perforated shell ki mounted coaxially between the body and the third perforated shell. 2. The regenerative burner according to claim 1, characterized in that the housing, the first, second and third perforated shells form channels for supplying cold air, heated air and heated air.