阅读说明：本技术 一种节能型燃气辐射管 (Energy-saving gas radiant tube ) 是由 胡双大 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种节能型燃气辐射管,包括辐射管体以及燃气烧嘴,所述燃气烧嘴安装在所述辐射管体的一端,所述辐射管体内设置有一用于增加废气流出行程的旋流节能装置。本发明的有益效果在于：在辐射管体内设置旋流节能装置,增加了废气流出的行程,使较多的热量留存在辐射管体内,实验证明,不论是直管式燃气辐射管还是弯管式燃气辐射管,其燃气热能效率平均提高10-12％。(The invention discloses an energy-saving gas radiant tube which comprises a radiant tube body and a gas burner, wherein the gas burner is arranged at one end of the radiant tube body, and a rotational flow energy-saving device used for increasing the outflow stroke of waste gas is arranged in the radiant tube body. The invention has the beneficial effects that: the rotational flow energy-saving device is arranged in the radiation tube body, so that the exhaust gas outflow stroke is increased, more heat is kept in the radiation tube body, and experiments prove that the gas heat energy efficiency is averagely improved by 10-12% no matter the radiation tube is a straight tube type gas radiation tube or a bent tube type gas radiation tube.)

1. The energy-saving gas radiant tube is characterized in that a rotational flow energy-saving device used for increasing the exhaust gas outflow stroke is arranged in the radiant tube body.

2. The energy-saving gas radiant tube of claim 1, wherein the swirl flow economizer comprises:

the connecting rod is fixedly arranged in the radiant tube body, the axis of the connecting rod is in the direction of the central axis of the radiant tube body, and the length of the connecting rod is smaller than that of the radiant tube body;

the plurality of spinning disks are axially arranged on the connecting rod along the axial direction of the connecting rod; and

and each space ring is sleeved on the connecting rod and is positioned between two adjacent spinning disks.

3. The energy saving gas fired radiant tube of claim 2, wherein the swirl plate is a silicon carbide swirl plate.

4. The energy saving gas radiant tube of claim 2, wherein the connecting rod is a heat resistant steel connecting rod and the spacer is a heat resistant steel spacer.

5. The energy-saving gas radiant tube as claimed in any one of claims 1 to 4, wherein the radiant tube body is a straight tube type radiant tube body or a bent tube type radiant tube body.

Technical Field

The invention relates to a gas radiant tube for burning gas fuel, in particular to an energy-saving gas radiant tube.

Background

In heat treatment production equipment, an electric heating mode is developed to be more perfect and mature at present, people adopt various electric heating elements, such as heating wires, heating belts, heating pipes, radiant tubes and the like, and also adopt various control modes, so that the uniformity of the furnace temperature in the furnace is better ensured.

Gas heating has several advantages over electrical heating. Firstly, natural gas is clean energy, and products obtained after the natural gas is mixed with air and combusted are carbon dioxide and water, so that the natural gas has no pollution to the atmosphere; secondly, in areas with rich gas supply (including areas along the west-east gas transmission line), the use cost of the gas is lower than that of electricity heating; moreover, the gas is not limited by the peak power consumption, and the normal production of enterprises is not influenced.

With the development of science and technology, the structure of the gas burner is improved, and a new mode is provided for controlling the gas burner, for example, the size fire of the burner can be adjusted by using pulses, or the heating time of the gas burner is controlled by using the on-off form and the on-off time, and the like. For the controlled atmosphere furnace, a gas burner with a radiant tube is needed to isolate the atmosphere in the furnace from the mixed gas of gas and air.

The existing gas radiant tubes in China are various, but can be generally divided into two types, one type is a straight tube type gas radiant tube, and the other type is a bent tube type gas radiant tube. No matter it is straight tube type gas radiant tube (as shown in fig. 1) or elbow type gas radiant tube (as shown in fig. 2), both include radiant tube body 10, gas burner 20 and waste gas heat transfer device 30, gas burner 20 is installed at one end 11 of radiant tube body 10 and its gas burner head 21 stretches into in radiant tube body 10, and waste gas heat transfer device 30 suit in straight tube type gas radiant tube is on gas burner head 21 that gas burner 20 stretches into in radiant tube body 10, waste gas heat transfer device 30 in the elbow type gas radiant tube is then installed on other end 12 of radiant tube body 10. The exhaust gas heat exchange device 30 can preheat the air before entering the gas burner 20 to about 300-500 ℃ by utilizing the exhaust gas with the temperature of about 800 ℃ after mixed combustion, thereby improving the heat efficiency of the burner. The utilization rate of the heat energy converted from the fuel gas of the existing fuel gas radiant tube is between 35 and 55 percent, but the waste gas after combustion still carries a large amount of heat to be discharged out of the system, thereby causing the waste of energy.

The applicant has therefore made an advantageous search and attempt to solve the above-mentioned problems, in the context of which the technical solutions to be described below have been created.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the problem that the energy is wasted because the waste gas after combustion carries a large amount of heat to be discharged out of a system in the conventional gas radiant tube, the energy-saving gas radiant tube capable of greatly improving the heat efficiency is provided.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

the energy-saving gas radiant tube is characterized in that a rotational flow energy-saving device used for increasing the exhaust gas outflow stroke is arranged in the radiant tube body.

In a preferred embodiment of the present invention, the swirl flow economizer comprises:

the connecting rod is fixedly arranged in the radiant tube body, the axis of the connecting rod is in the direction of the central axis of the radiant tube body, and the length of the connecting rod is smaller than that of the radiant tube body;

the plurality of spinning disks are axially arranged on the connecting rod along the axial direction of the connecting rod; and

and each space ring is sleeved on the connecting rod and is positioned between two adjacent spinning disks.

In a preferred embodiment of the invention, the spinning disk is a silicon carbide spinning disk.

In a preferred embodiment of the invention, the connecting rod is a heat-resistant steel connecting rod and the spacer is a heat-resistant steel spacer.

In a preferred embodiment of the present invention, the radiant tube body is a straight tube type radiant tube body or a bent tube type radiant tube body.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the rotational flow energy-saving device is arranged in the radiant tube body, so that the exhaust gas outflow stroke is increased, and more heat is remained in the radiant tube body, and experiments prove that the heat energy efficiency of the fuel gas is averagely improved by 10-12% no matter the fuel gas is a straight tube type fuel gas radiant tube or a bent tube type fuel gas radiant tube;

2. for the bent pipe type gas radiation pipe, the defect that the temperature of a heating end is higher than that of a waste gas discharge end for a long time is overcome, a large amount of heat is accumulated through a rotational flow energy-saving device for absorbing heat energy, so that the temperatures of two ends of the bent pipe type gas radiation pipe are close to be consistent, and the uniformity of the temperature in the furnace is greatly improved;

3. the invention utilizes the waste heat of the waste gas and directly radiates the waste heat into the heating furnace, so that the consumption of natural gas is obviously reduced, and the production cost of enterprises is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a conventional straight tube type gas radiation tube.

Fig. 2 is a schematic structural view of a conventional elbow type gas radiation pipe.

Fig. 3 is a schematic structural view of embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.