阅读说明：本技术 一种具有切换进气模式功能的燃烧装置 (Combustion device with air inlet mode switching function ) 是由 赵杰 苏玉纲 袁付民 于 2019-10-14 设计创作，主要内容包括：一种具有切换进气模式功能的燃烧装置,包括燃烧器,燃烧器具有燃气接口和空气接口,还包括有三通阀,所述三通阀分别连接有空气入口、空气管以及与预混管,预混管连接有燃气入口,空气从空气入口进入三通阀内,三通阀使空气仅进入空气管或预混管内,当空气进入空气管时,空气与燃气在所述燃烧器内混合；当空气进入所述预混管内,空气与燃气在所述预混管内混合后进入所述燃烧器内；燃烧装置进入非预混模式工作,由于燃气和空气各自拥有独立通道,通入的流量大,可满足大功率的工况需求；燃烧装置进入预混模式工作,由于燃气和空气一起通过预混管进入燃烧器内,燃烧装置的氮氧化物排放量比非预混模式低,适用于要求氮氧化物排放低的场合。(A combustion device with a function of switching an air inlet mode comprises a combustor, a three-way valve and a gas inlet, wherein the combustor is provided with a gas interface and an air interface, the three-way valve is respectively connected with an air inlet, an air pipe and a premixing pipe, the premixing pipe is connected with the gas inlet, air enters the three-way valve from the air inlet, the three-way valve enables the air to enter the air pipe or the premixing pipe only, and when the air enters the air pipe, the air and the gas are mixed in the combustor; when air enters the premixing pipe, the air and gas are mixed in the premixing pipe and then enter the combustor; the combustion device enters a non-premixing mode to work, and the gas and the air respectively have independent channels, so that the introduced flow is large, and the requirement of high-power working conditions can be met; the combustion device enters a premixing mode to work, and as the gas and the air enter the combustor through the premixing pipe, the discharge amount of nitrogen oxides of the combustion device is lower than that of a non-premixing mode, and the combustion device is suitable for occasions requiring low discharge amount of the nitrogen oxides.)

1. A combustion device with a function of switching an air inlet mode comprises a combustor (1), wherein the combustor (1) is provided with a gas interface (11) and an air interface (12), and is characterized by further comprising a three-way valve (2), the three-way valve (2) is respectively connected with an air inlet (6), an air pipe (3) connected with the air interface (12) and a premixing pipe (4) connected with the gas interface (11), the premixing pipe (4) is connected with a gas inlet (5), air enters the three-way valve (2) from the air inlet (6), the three-way valve (2) enables the air to enter the air pipe (3) or the premixing pipe (4) only, and when the air enters the air pipe (3), the air and the gas are mixed in the combustor (1); when air enters the premixing pipe (4), the air and the fuel gas are mixed in the premixing pipe (4) and then enter the combustor (1).

2. A combustion device according to claim 1, wherein the burner (1) comprises a mixing chamber (14), a nozzle (7) arranged in the mixing chamber (14) and a first tube (13) connected to the premix tube (4), the nozzle (12) being arranged at the end of the first tube (13).

3. A combustion unit according to claim 2, wherein said nozzle (7) comprises a gas outlet (71) communicating with said first pipe (13) and an air outlet (72) communicating with said air pipe (3).

4. Burner according to claim 1, characterized in that said premix tube (4) is internally sheathed with a second tube (41) connected to said three-way valve (2), said gas inlet (5) being arranged in the region of the external wall of said second tube (41).

5. A combustion unit according to any one of claims 1-4, characterized in that the three-way valve (2) is a pneumatic three-way valve or an electric three-way valve or a mechanical three-way valve.

Technical Field

The invention relates to the technical field of combustion equipment, in particular to a combustion device with a function of switching an air intake mode.

Background

the gas burner takes natural gas and other gases as fuels, and has the characteristics of sufficient combustion, high combustion temperature, easy control of combustion and the like. Combustion systems with gas burners are widely used in various industries, such as petrochemical, building, electrical, textile, printing and dyeing, steel, metallurgy, machinery, food, and the like.

Although the combustion system has a wide market prospect, the existing combustors in the market are single-function combustion systems, when a customer has a multifunctional requirement, the single combustion system cannot meet the requirement of the customer, so that great loss in time, cost and the like is brought to the customer, and the prior art has an improvement.

disclosure of Invention

In order to solve the technical problems, the invention provides the combustion device with the function of switching the air inlet mode, and the switching of different working states of the combustor is realized through the three-way valve, so that the combustor can adapt to different working environments, and the time cost and the economic investment of customers are saved.

in order to achieve the purpose, the technical scheme of the invention is as follows: a combustion device with a function of switching an air inlet mode comprises a combustor, a three-way valve and a control device, wherein the combustor is provided with a gas interface and an air interface, the three-way valve is respectively connected with an air inlet, an air pipe connected with the air interface and a premixing pipe connected with the gas interface, the premixing pipe is connected with a gas inlet, air enters the three-way valve from the air inlet, the three-way valve enables the air to enter the air pipe or the premixing pipe only, and when the air enters the air pipe, the air and the gas are mixed in the combustor; when air enters the premixing pipe, the air and the fuel gas are mixed in the premixing pipe and then enter the combustor.

By adopting the technical scheme, when the air inlet is communicated with the air pipe through the three-way valve, the combustion device enters a non-premixing mode to work, air enters the combustor through the air pipe, gas enters the combustor through the premixing pipe, the two gases are mixed in the combustor and then start to combust, and as the gas and the air respectively enter the combustor through the premixing pipe and the air pipe, the gas and the air have respective independent channels, the introduced flow is large, and the requirement of a high-power working condition can be met; when the three-way valve enables the air inlet to be communicated with the premixing pipe, the combustion device enters a premixing mode to work, air and gas are mixed to enter the combustor when passing through the premixing pipe, the gas and the air enter the combustor through the premixing pipe, the flow rate of the introduced gas and the introduced air is less than that of the gas and the air in the non-premixing mode, the power which can be realized by the combustion device is smaller than that of the non-premixing mode, but the gas and the air are fully mixed in the premixing pipe in advance, so that the emission of nitrogen oxides of the combustion device is lower than that of the non-premixing mode, and the method is suitable for occasions.

The invention is further configured to: the combustor is including mixing the inner chamber, setting up the nozzle in mixing the inner chamber and with the first body that mixes the union coupling, the nozzle sets up the tip of first body.

Through adopting above-mentioned technical scheme, improve the mixed effect of gas and air under the non-mode of premixing of combustor, improve the combustion effect of gas burning.

The invention is further configured to: the nozzle comprises a fuel gas outlet communicated with the first pipe body and an air outlet communicated with the air pipe.

Through adopting above-mentioned technical scheme, the air flows around the nozzle under the non-premixing mode, makes the gas can with the abundant mixture of air, improves the combustion effect of gas burning.

The invention is further configured to: the premixing pipe is internally sleeved with a second pipe body connected with the three-way valve, and the gas inlet is formed in the interval of the outer wall of the second pipe body.

Through adopting above-mentioned technical scheme, the gas entry sets up in the outer wall interval of second body, under the mode of premixing for the gas flows at the outer wall of laminating second body when getting into the premix pipe, makes air and gas intensive mixing in the premix pipe, prevents that the air from causing the influence to the gas that lets in.

The invention is further configured to: the three-way valve is a pneumatic three-way valve, an electric three-way valve or a mechanical three-way valve.

By adopting the technical scheme, a user can conveniently control the communication state of the three-way valve.

In summary, the present invention has the following technical effects:

1. when the non-premixing mode is adopted for working, as the gas and the air respectively enter the combustor through the premixing pipe and the air pipe, the gas and the air respectively have independent channels, the introduced flow is large, and the requirement of high-power working condition can be met;

2. When the premixing mode is adopted for working, because the gas and the air enter the combustor through the premixing pipe together, the flow rate of the introduced gas and the introduced air is less than that of the non-premixing mode, the power which can be realized by the combustion device is smaller than that of the non-premixing mode, but because the gas and the air are fully mixed in the premixing pipe in advance, the discharge amount of nitrogen oxides of the combustion device is lower than that of the non-premixing mode, and the premixing mode is suitable for occasions requiring the low discharge amount of the nitrogen oxides.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below.

FIG. 1 is a schematic view of the overall structure of a combustion apparatus having a function of switching intake modes;

FIG. 2 is a schematic view of the combustion apparatus in a premix mode of operation;

FIG. 3 is a schematic diagram of the non-premixed mode of operation of the combustion apparatus.

In the figure: 1. a burner; 11. a gas interface; 12. an air interface; 13. a first pipe body; 14. a mixing chamber; 2. a three-way valve; 3. an air tube; 4. a premix tube; 41. a second tube body; 5. a gas inlet; 6. an air inlet; 7. a nozzle; 71. a gas outlet; 72. and an air outlet.

Detailed Description

the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, a combustion apparatus having a function of switching an intake mode includes a combustor 1, the combustor 1 having a gas port 11 and an air port 12, and further including a three-way valve 2, the three-way valve 2 being connected to an air inlet 6, an air pipe 3 connected to the air port 12, and a pre-mixing pipe 4 connected to the gas port 11, the pre-mixing pipe 4 being connected to a gas inlet 5 for gas to enter, air entering the three-way valve 2 from the air inlet 6, the three-way valve 2 making air enter only the air pipe 3 or the pre-mixing pipe 4, and when air enters the air pipe 3, the air and the gas are mixed in the combustor 1; when air enters the premix tube 4, the air and the fuel gas are mixed in the premix tube 4 and then enter the combustor 1.

The burner 1 comprises a mixing inner cavity 14 and a nozzle 7 arranged in the mixing inner cavity 14, wherein the nozzle 7 is arranged at the end part of a first pipe body 13; the nozzle 7 comprises a gas outlet 71 communicating with the first tubular body 13 and an air outlet 72 communicating with the air tube 3.

The inner sleeve of the premixing pipe 4 is provided with a second pipe body connected with the three-way valve 2, and the gas inlet 5 is arranged in the outer wall interval of the second pipe body.

In this scheme, three-way valve 2 is pneumatic three-way valve or electronic three-way valve or mechanical three-way valve.

As shown in fig. 2, the burner 1 is in the premix mode (in the figure, the dashed line represents gas, the dashed line represents air, and the solid line represents mixed gas):

When the three-way valve 2 enables the air inlet 6 to be communicated with the premixing pipe 4, the combustion device enters a premixing mode to work, two gases are mixed in the premixing pipe 4 and then enter the combustor 1, the gas and the air enter the combustor 1 through the premixing pipe 4, the flow rate of the introduced gas and the introduced air is less than that of the gas and the introduced air, the power which can be realized by the combustion device is smaller than that of the gas and the air in the non-premixing mode, but the gas and the air are fully mixed in the premixing pipe 4 in advance, so that the emission of nitrogen oxides of the combustion device is lower than that of the non-premixing mode, and the combustion device is suitable for occasions requiring.

As shown in fig. 3, the burner 1 is in the non-premixing mode (in the figure, the dotted line is gas, the dotted line is air, and the solid line is mixture gas):

when three-way valve 2 made air inlet 6 and air pipe 3 communicate, burner got into non-premixing mode work, and in the air passed through air pipe 3 entering combustor 1, the gas passed through in premixing pipe 4 entering combustor 1, two kinds of gases began to burn after mixing in combustor 1, because in gas and air got into combustor 1 through gas pipe and air pipe 3 respectively, possessed respective independent passageway, the flow that lets in is big, can satisfy powerful operating mode demand.

It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.