US-12618553-B2 - Burner, burner module, burner assembly and heating device comprising same

US12618553B2US 12618553 B2US12618553 B2US 12618553B2US-12618553-B2

Abstract

A burner comprising least one first passage and at least one second passage are formed in the burner, the at least one first passage and the at least one second passage are arranged such that a first fluid from an outlet of the at least one first passage and a second fluid from an outlet of the at least one second passage are mixed with each other, and the at least one first passage is configured to cause the first fluid to produce a rotational flow in a first rotation direction, and/or, the at least one second passage is configured to cause the second fluid to produce a rotational flow in a second rotation direction.

Inventors

Tao YAN
Remi Tsiava
PETER VAN KAMPEN
Yuquan GU

Assignees

L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude

Dates

Publication Date: 20260505
Application Date: 20221222
Priority Date: 20211230

Claims (10)

1 . A burner, comprising at least one first passage and at least one second passage formed within the burner, wherein an inlet of each of the at least one first passage is fluidly connected to a supply port of a first fluid, and an inlet of each of the at least one second passage is fluidly connected to a supply port of a second fluid; wherein the at least one first passage and the at least one second passage are arranged such that the first fluid from an outlet of the at least one first passage and the second fluid from an outlet of the at least one second passage are mixed with each other; wherein the at least one first passage is configured to cause the first fluid to produce a rotational flow in a first rotation direction; and/or the at least one second passage is configured to cause the second fluid to produce a rotational flow in a second rotation direction, wherein the burner is configured to operate as a submerged burner, wherein a mixing channel is formed in the burner, and the outlet of each of the first passages and the outlet of each of the second passages are fluidly connected to the mixing channel, so that the first fluid and the second fluid mix in the mixing channel and flow out through an outlet of the mixing channel, and wherein the at least one first passage is a plurality of first passages, and the plurality of first passages are positioned such that the first fluid from the outlet of each of the first passages respectively merges into the mixing channel in the tangential direction of the mixing channel along the first rotation direction.
2 . The burner according to claim 1 , wherein the second passage is one second passage, which is aligned with the mixing channel upstream of the mixing channel, and a helical groove with the helical direction being the second rotation direction that is opposite to the first rotation direction is formed in at least a part of the second passage.
3 . The burner according to claim 1 , wherein a plurality of second passages are formed, and the plurality of second passages are positioned such that the second fluid from the outlet of each of the second passages respectively merges into the mixing channel in the tangential direction of the mixing channel along the second rotation direction, and the second rotation direction is opposite to the first rotation direction.
4 . The burner according to claim 1 , wherein each of the first passages comprises: a first part, which extends parallel to an axis of the burner from the inlet of the first passage; and a second part, extending obliquely toward the corresponding tangential direction of the mixing channel from the first part to the outlet of the first passage.
5 . The burner according to claim 1 , wherein each of the first passages extends obliquely toward the corresponding tangential direction of the mixing channel from the inlet to the outlet of the first passage.
6 . A method of utilizing a burner comprising at least one first passage and at least one second passage formed within in the burner, wherein an inlet of each of the at least one first passage is fluidly connected to a supply port of a first fluid, and an inlet of each of the at least one second passage is fluidly connected to a supply port of a second fluid; wherein the at least one first passage and the at least one second passage are arranged such that the first fluid from an outlet of the at least one first passage and the second fluid from an outlet of the at least one second passage are mixed with each other; wherein the at least one first passage is configured to cause the first fluid to produce a rotational flow in a first rotation direction; and/or the at least one second passage is configured to cause the second fluid to produce a rotational flow in a second rotation direction, and wherein the burner is configured to operate as a submerged burner, the method comprising, introducing the first fluid from the supply port of the first fluid into the at least one first passage, introducing the second fluid from the supply port of the second fluid into the at least one second passage, mixing the first fluid and the second fluid, thereby producing a mixed fluid, wherein the first fluid rotates in a first rotational direction and the second fluid rotates in a second rotational direction, and wherein the burner operates as a submerged burner, wherein a mixing channel is formed in the burner, and the outlet of each of the first passages and the outlet of each of the second passages are fluidly connected to the mixing channel, so that the first fluid and the second fluid mix in the mixing channel and flow out through an outlet of the mixing channel, wherein the at least one first passage is a plurality of first passages, and the plurality of first passages are positioned such that the first fluid from the outlet of each of the first passages respectively merges into the mixing channel in the tangential direction of the mixing channel along the first rotation direction.
7 . The method according to claim 6 , wherein the second passage is one second passage, which is aligned with the mixing channel upstream of the mixing channel, and a helical groove with the helical direction being the second rotation direction that is opposite to the first rotation direction is formed in at least a part of the second passage.
8 . The method according to claim 6 , wherein a plurality of second passages are formed, and the plurality of second passages are positioned such that the second fluid from the outlet of each of the second passages respectively merges into the mixing channel in the tangential direction of the mixing channel along the second rotation direction, and the second rotation direction is opposite to the first rotation direction.
9 . The method according to claim 6 , wherein each of the first passages comprises: a first part, which extends parallel to an axis of the burner from the inlet of the first passage; and a second part, extending obliquely toward the corresponding tangential direction of the mixing channel from the first part to the outlet of the first passage.
10 . The method according to claim 6 , wherein each of the first passages extends obliquely toward the corresponding tangential direction of the mixing channel from the inlet to the outlet of the first passage.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority under 35 U.S.C. § 119 (a) and (b) to Chinese Patent Application No. 202111680255.3, filed Dec. 30, 2021, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to a burner, a burner assembly comprising the burner, a burner module comprising the burner, and a heating device provided with the burner. BACKGROUND CO2 emission has become a common concern in the international community. This is one of the most important topics in the society today. People are making efforts to seek solutions for reducing CO2 emission. One of the main directions is to reduce CO2 emission by reducing energy consumption and increasing energy utilisation rate. A burner is an apparatus that converts an oxidant and a fuel into heat by a chemical reaction of combustion. A heating device (for example, a furnace) heats a heated medium therein by the provision of a burner. The heating methods conventionally adopt flame radiation heating or indirect heating (with the heat of flame combustion transferred to the heated medium through a heat transfer medium), which has the characteristics of high thermal discharge, low thermal efficiency and high energy consumption. These problems are more serious for high-temperature manufacturing processes such as glass melting. Generally, glass is made from a mixture of raw materials such as silicates, basalt, limestone, sodium carbonate, and other minor components, which are added to a glass furnace and melted into a liquid state at a temperature of approximately 1,250° C. to 1,500° C.; then the melt is formed. Depending on the intended use of the melt, for example, glass or fibres for various applications, a further melting and refining step is performed before the forming process. A conventional glass furnace comprises a burner that generates flame in the space between the surface of the glass melt and the top of the furnace, thereby heat is transferred to the glass melt by radiation from the flame itself and the top material. A lot of energy is consumed in the process of heat transfer. In the prior art, submerged combustion is also used for glass melting and other industries, for example, processing of metals and solid waste (glass melting is used as an example below). Specifically, the submerged burner is located below the surface of the raw materials of glass. Submerged burners may be installed on the side wall and/or bottom of a glass furnace, and some may also be installed at the top of the furnace with the nozzles immersed in the glass melt. For submerged burners, the flame and the combustion products produced by the combustion of the fuel and the oxidant pass through the glass melt and directly contact the glass melt, and thus the heat transfer is much more effective than methods where the flame is located above the surface of the glass melt for radiation heat transfer, thus reducing the heat transfer to the refractory in the glass furnace and the heat loss in the flue gas, which can reduce fuel consumption and thus carbon dioxide emission. In addition, NOx emissions are also reduced during the combustion process due to the lower temperature above the glass melt in the combustion chamber. Further, the combustion products of a high flow rate generated by the oxidant and the fuel enter the glass melt, and the gas expands during the submerged combustion process, thereby the raw materials of glass melt rapidly and generate a large amount of turbulence. The molten glass is easier to be mixed evenly, which can eliminate the need for a mechanical stirrer in the prior art, and the heat transfer effect between a cold melt and a hot melt is better. Moreover, submerged burners have a smaller size, higher production efficiency and lower furnace installation costs than conventional burners that are provided above the glass melt. However, for submerged burners, there are still various problems that need to be solved. For example, how to achieve more stable flame, prevent the flame from extinguishing, prevent burner backfire, reduce ablation of the burner, prevent explosion due to mixing of fluids, improve the combustion performance when hydrogen is used as the fuel, improve the heat transfer efficiency, prevent clogging of the nozzles by the heated medium, and monitor the status of the burner are issues requiring continuous attention during the design of submerged burners. These issues are also need attention and solutions in the design of non-submerged burners. The purpose of the present invention is to overcome at least one aspect of the above problems and shortcomings and other technical problems in the prior art. SUMMARY In a first solution of the present invention, a burner is provided, and at least one first passage and at least one second passage are formed in the burner, wherein an inlet of each first passage is fluidly connected to a supply port of a first fl