CN112032712A - A natural gas energy-saving and environmental protection spray gun for industry - Google Patents

Abstract

The invention discloses a natural gas energy-saving and environmental protection spray gun for industry, which comprises a gun seat, a natural gas pipe and a natural gas interface, wherein the natural gas interface is connected with the natural gas pipe, and also includes an air pipe, an ignition needle, an air distribution pipe disc, the first cyclone, the second cyclone, the stainless steel sleeve and the silicon carbide sleeve; the beneficial technical effect of this scheme is: because the natural gas and air in this scheme are premixed twice, the natural gas is fully premixed , the combustion calorific value is high, energy saving, and due to complete combustion, no drag fire and flue gas will be generated, and waste emissions are less; in addition, because the natural gas is fully burned in the combustion chamber, the flame stiffness at the exit of the silicon carbide sleeve is strong, The injection distance is long to avoid the phenomenon that the natural gas is carbonized and coked before the natural gas is not burned due to insufficient combustion of the conventional burner.

Description

A natural gas energy-saving and environmental protection spray gun for industry

technical field

The invention relates to the technical field of industrial natural gas combustion equipment, in particular to a natural gas energy-saving and environmental protection spray gun for industry.

Background technique

Referring to Figure 1, it is a schematic diagram of the overall structure of an existing industrial natural gas spray gun. The existing natural gas spray gun mainly consists of a gun seat 1', a natural gas interface 2', a fire viewing mirror 3', a natural gas pipe 4', and an air distribution plate. 5', natural gas nozzle 6', stainless steel sleeve 7' and silicon carbide sleeve 8', the main defects in actual use are: 1. During the combustion process of the spray gun, there is uneven mixing of natural gas and air, resulting in During the combustion process, the natural gas cannot be completely burned, the efficiency is low, part of the natural gas is wasted, and the cost of use in the factory is high; 2. The natural gas is not completely burned in the spray gun, and is affected by the airflow in the heating space. 3. Because the premixing structure is too simple, the burner has a small adaptability range, and flameout is easy to occur when the amount of natural gas is small; 4. Due to the unreasonable design of the spray gun structure, the natural gas is not completely burned, resulting in low flame temperature and external The temperature of the silicon carbide sleeve is low, and the heat transfer efficiency is not high.

SUMMARY OF THE INVENTION

In view of the defects existing in the prior art, the purpose of the present invention is to provide a natural gas energy-saving and environmental protection spray gun for industry. ,Energy saving.

For achieving the above object, the technical scheme adopted in the present invention is as follows:

A natural gas energy-saving and environmental protection spray gun for industry, the environmental protection spray gun includes a gun seat, a natural gas pipe and a natural gas interface, wherein the natural gas interface is connected with the natural gas pipe, and the environmental protection spray gun also includes an air pipe, an ignition needle , air distribution plate, first cyclone, second cyclone, stainless steel sleeve and silicon carbide sleeve, the air duct is sleeved on the periphery of the natural gas pipe, and the air distribution plate is installed on the air duct One end of the air inlet is sleeved on the outer end surface of the natural gas pipe, the first cyclone is installed on one end of the air outlet of the air pipe, the silicon carbide sleeve is installed on the gun seat, The stainless steel sleeve is arranged on the inner wall of the silicon carbide sleeve, the second cyclone is sleeved on the outer end surface of the first cyclone and is located in the inner cavity of the stainless steel sleeve, wherein the The natural gas flowing out of the natural gas pipe is sequentially mixed with the air flowing out of the first cyclone and the second cyclone.

Further, the ignition needle is horizontally and fixedly installed in the inner cavity of the gun seat, wherein the ignition end of the ignition needle extends into the inner cavity of the second swirler.

Further, an asbestos pad is also arranged between the silicon carbide sleeve and the gun seat.

Further, the air distribution disc includes a disc-shaped air distribution disc body, a mounting hole arranged at the center of the air distribution disc body, and a plurality of air inlet holes arranged at intervals on the end face of the air distribution disc body, The air distribution plate is sleeved on the outer end surface of the natural gas pipe through the installation hole, and the plurality of air inlet holes are communicated with the inner cavity of the air pipe.

Further, the environmental protection spray gun also includes a fire viewing mirror arranged on the end face of the gun seat.

Compared with the prior art, the beneficial technical effects of this solution are:

1. Because the natural gas and air in this scheme are premixed twice, the natural gas is fully premixed, the combustion calorific value is high, and energy is saved, and due to complete combustion, there will be no drag fire and flue gas, and waste emissions are less;

2. Since the natural gas is fully burned in the combustion chamber, the flame stiffness at the exit of the silicon carbide sleeve is strong and the injection distance is long, which avoids the phenomenon that the natural gas will be carbonized and coked before the combustion of the conventional burner is insufficient. The energy-saving and environmentally-friendly spray gun in the scheme can also adjust the spray distance by matching the outlets of different sizes or adjust the heating area freely by matching the silicon carbide sleeves with different lengths.

Description of drawings

FIG. 1 is a schematic structural diagram of an existing industrial natural gas spray gun.

FIG. 2 is a schematic structural diagram of a natural gas energy-saving and environmental protection spray gun in this embodiment.

FIG. 3 is a schematic structural diagram of the air distribution plate in this embodiment.

FIG. 4 is a schematic structural diagram of the first cyclone in this embodiment.

FIG. 5 is a schematic structural diagram of the second cyclone in this embodiment.

FIG. 6 is a schematic diagram of the working principle of the natural gas energy-saving and environmental protection spray gun in this embodiment.

The reference numbers in the figures indicate:

1'-gun seat, 2'-natural gas interface, 3'-fire sight glass, 4'-natural gas pipe, 5'-air distribution plate, 6'-natural gas nozzle, 7'-stainless steel sleeve, 8'-silicon carbide Sleeve, 1-gun seat, 2-natural gas interface, 3-fire sight glass, 4-ignition needle, 5-natural gas pipe, 6-air distribution plate, 61-air distribution plate body, 62-installation hole, 63-inlet Air hole, 7-air duct, 8-first cyclone, 9-second cyclone, 10-stainless steel sleeve, 11-silicon carbide sleeve, 12-asbestos pad.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

This solution is aimed at the existing industrial natural gas spray guns, which have uneven mixing of natural gas and air during the combustion process, which leads to the problems that the natural gas cannot be completely burned during the combustion process, the efficiency is low, some natural gas is wasted, and the cost of factory use is high. Furthermore, a natural gas energy-saving and environmental protection spray gun for industry is proposed. The natural gas energy-saving and environmental protection spray gun has a reasonable structure design, can effectively mix natural gas and air fully, ensure combustion effect, and save energy.

Referring to Fig. 2, a natural gas energy-saving and environmental protection spray gun for industry in this embodiment includes a gun seat 1, a natural gas pipe 5 and a natural gas interface 2, wherein the natural gas interface 2 is connected with the natural gas pipe 5, and it is also It includes an air duct 7 , an ignition needle 4 , an air distribution plate 6 , a first cyclone 8 , a second cyclone 9 , a stainless steel sleeve 10 and a silicon carbide sleeve 11 . The air pipe 7 is sheathed on the periphery of the natural gas pipe 5, and the air distribution plate 6 is installed on one end of the air inlet of the air pipe 7 and is sheathed on the outer end surface of the natural gas pipe 5. Referring to FIG. The disc includes a disc-shaped air distribution disc body 61, a mounting hole 62 arranged at the center of the air distribution disc body 61, and a plurality of air inlet holes 63 arranged at intervals on the end face of the air distribution disc body 61. 6 is sleeved on the outer end face of the natural gas pipe 5 through the installation hole 62 , and a plurality of air inlet holes 63 are communicated with the inner cavity of the air pipe 7 . The first cyclone 8 is installed on one end of the air outlet of the air duct 7, the silicon carbide sleeve 11 is installed on the gun seat 1, and an asbestos pad 12 is arranged between the silicon carbide sleeve 11 and the gun seat 1. The stainless steel sleeve 10 is arranged on the inner wall of the silicon carbide sleeve 11, the second cyclone 9 is sleeved on the outer end surface of the first cyclone 8 and is located in the inner cavity of the stainless steel sleeve 10, that is, the second cyclone 9 Located on the periphery of the outlet end of the first cyclone 8, it can be understood that the outer diameter of the second cyclone 9 is larger than that of the first cyclone 8 (which can be shown in conjunction with FIGS. 4 and 5). During operation, the natural gas input from the outside flows into the first cyclone 8 through one end of the gas outlet of the natural gas pipe 5, and at the same time, the external air enters the inner cavity of the air pipe 7 through the air distribution plate 6, and flows to the first cyclone. In the swirler 8, the first premixing is performed with the natural gas flowing out from the natural gas pipe 5; the mixed gas composed of the natural gas and air after the first premixing continues to be transported forward along the combustion chamber and flows to the second swirling flow At the same time, the outside air flows into the second cyclone 9 through the gap between the stainless steel sleeve 10 and the air duct 7, and flows into the second cyclone 9 with the first premixed gas ( air and natural gas) are mixed again, and the natural gas after being mixed with air for two times is then ignited by the ignition needle 4 for combustion. The ignition needle 4 in this embodiment is One end of the ignition extends into the second cyclone 9, so that the natural gas after the secondary mixing can be ignited; it is understandable that since the natural gas is mixed with the air twice, the mixing is more complete and the combustion is more efficient. full, higher thermal efficiency.

In order to be able to observe the combustion state of natural gas in a timely and convenient manner, a fire-viewing mirror 3 is also provided on the bottom end face of the gun base 1 in this embodiment.

2 and 6, during operation, the external natural gas enters the natural gas pipe 5 through the natural gas interface 2 and flows to the first cyclone 8, and simultaneously flows into the first cyclone 8 through the air pipe for the first time. premix. The premixed natural gas is premixed for the second time with the air passing through the stainless steel sleeve 10 to the second cyclone 9 in the combustion chamber, and the premixed combustion is more complete and the flame temperature is high. Because the natural gas burns more fully, it avoids the dragging phenomenon of conventional spray guns due to the influence of the airflow in the heating space, and its temperature control is more precise. In the least natural gas (that is, when the gas butterfly valve is almost closed, the natural gas from the butterfly valve gap) is mixed by an appropriate amount of air in the first cyclone 8 and the second cyclone 9 to ensure stable combustion; When the gas butterfly valve is gradually opened to the maximum, the natural gas combustion flame in the spray gun moves from the inside to the outside, and changes from small to large. During the whole process, the natural gas and air are fully mixed, and the combustion is more stable. With the gradual increase of the natural gas supply (the opening of the gas butterfly valve is increased), the flame of combustion also spreads from the combustion center to the surrounding, that is, burns uniformly along the inner wall of the silicon carbide, so that the silicon carbide sleeve 11 has a good heat transfer function.

To sum up, the natural gas energy saving and environmental protection spray gun in this scheme is premixed with air twice, the natural gas is fully premixed, the combustion calorific value is high, and energy is saved. Flue gas, less waste and emission; because the natural gas is fully burned in the combustion chamber, the flame stiffness through the exit of the silicon carbide sleeve is strong, and the injection distance is long, which avoids the insufficient combustion of the conventional burner and causes the natural gas to be carbonized and coked before it is burned. In addition, the energy-saving and environmentally friendly spray gun in this scheme can also adjust the spray distance by matching the outlets of different sizes or adjust the heating area freely by matching the silicon carbide sleeves with different lengths.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their technical equivalents, the present invention is also intended to include these modifications and variations.

Claims (5)

1. a natural gas energy-saving environmental protection spray gun for industry, the environmental protection spray gun includes a gun seat, a natural gas pipe and a natural gas interface, wherein the natural gas interface is connected with the natural gas pipe, it is characterized in that: the environmental protection spray gun also includes There are air duct, ignition needle, air distribution plate, first cyclone, second cyclone, stainless steel sleeve and silicon carbide sleeve, the air duct is sleeved on the periphery of the natural gas pipe, the air distribution plate Installed on one end of the air inlet of the air duct and sleeved on the outer end surface of the natural gas pipe, the first cyclone is installed on one end of the air outlet of the air duct, and the silicon carbide sleeve is installed on the On the gun seat, the stainless steel sleeve is arranged on the inner wall of the silicon carbide sleeve, and the second cyclone is sleeved on the outer end surface of the first cyclone and is located on the inner wall of the stainless steel sleeve. In the inner cavity, the natural gas flowing out of the natural gas pipe is sequentially mixed with the air flowing out of the first cyclone and the second cyclone. 2 . The industrial natural gas energy-saving and environmental protection spray gun according to claim 1 , wherein the ignition needle is horizontally and fixedly installed in the inner cavity of the gun seat, wherein the ignition end of the ignition needle extends. 3 . into the inner cavity of the second cyclone. 3 . The industrial natural gas energy-saving and environmental protection spray gun according to claim 1 or 2 , wherein an asbestos pad is further arranged between the silicon carbide sleeve and the gun seat. 4 . 4. A natural gas energy-saving and environmental protection spray gun for industry according to claim 1, wherein the air distribution plate comprises a disc-shaped air distribution plate body, which is arranged at the center of the air distribution plate body installation holes and a plurality of air inlet holes arranged at intervals on the end face of the air distribution plate body, wherein the air distribution plate is sleeved on the outer end surface of the natural gas pipe through the installation holes, and a plurality of the air inlet holes communicated with the inner cavity of the air duct. 5 . The natural gas energy-saving and environmental protection spray gun for industry according to claim 1 , wherein the environmental protection spray gun further comprises a fire viewing mirror arranged on the end face of the gun seat. 6 .

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