Full-premixing surface combustion machine

Abstract

A full-premixing surface combustion engine is provided with a PLC control unit and a PID controller, expected oxygen content data are set through the PLC control unit and transmitted to the PID controller, an oxygen content analyzer is further arranged, the oxygen content analyzer extracts air around a combustion head, analyzes the oxygen content and transmits the information to the PID controller, and according to the oxygen content information, the combustion head is controlled by the PLC control unit. And the PID controller transmits a signal to the air blower, controls the rotating speed of the air blower and adjusts the amount of blown air, so that the effect of full premixing is realized. Due to the fact that full-premixing fuel gas oxygen supply is sufficient, flame burning around the burning head does not need to stretch like the outside to obtain oxygen, the situation that the flame is attached to the surface of the burning head for burning is shown, the flame is uniform, generation of nitric oxide is reduced, generation of carbon monoxide is avoided, and the energy utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the field of burners, in particular to a full premixed surface burner. Background Art

[0002] Full premixing means that in the burner, the oxygen component contained in the premixed gas before entering the combustion head can satisfy the full combustion of the combustible gas component contained therein.

[0003] Existing burners often have some problems: the oxygen supply cannot adapt to the combustible gas. When there is insufficient oxygen, the flame extends outward in the flame head to obtain more oxygen in the air, which will cause uneven temperatures in different parts of the flame. Among them, the temperature of the outer flame part is higher, which can easily lead to excessive nitrogen oxide emissions in the combustion products. At the same time, incomplete combustion of gas will produce carbon monoxide, which may cause poisoning of people. In addition, incomplete combustion of gas wastes energy.

[0004] Patent number "2022229737355" and patent name "A light hydrocarbon atomization device" discloses the composition of light hydrocarbons and its atomization device. The spray formed by the atomization device is mixed with external air in proportion to form gas, which enters the gas supply terminal through a pipeline. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a full premixed surface burner, which solves the problems of uneven flame and incomplete combustion of the prior burners.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A full premixed surface burner is provided with a machine box, a blower, a mounting plate, a combustion head, and an igniter, wherein the machine box inlet is connected to the blower, and the machine box outlet is connected to the mounting plate, the mounting plate is connected to the combustion head, the igniter is fixed on the mounting plate and ignites the combustion head, a gas inlet is also connected between the machine box and the mounting plate, the combustion head is provided with a hood cylinder with one end open, and the open end is connected to the mounting plate, and the mounting plate is provided with a hole adapted to the combustion head; an oxygen content analyzer is fixedly installed on the mounting plate, and the oxygen content analyzer is provided with a needle tube for extracting gas near the combustion head; a PLC control unit and a PID controller are also provided, the oxygen content analyzer and the blower are electrically connected to the PID controller respectively, the PID controller is electrically connected to the PLC control unit, and the igniter is electrically connected to the PLC control unit.

[0008] Preferably, the burner head is woven from metal fibers, and the distance between any two points of the pores formed by the fiber weaving on the burner head is ≤2 mm.

[0009] Preferably, the gas inlet is connected to a gas supply device, and the gas supply device is electrically connected to a PLC control unit.

[0010] Preferably, a filter is connected to one end of the blower away from the chassis.

[0011] Preferably, a flame detection needle is also provided, which is fixedly arranged on the mounting plate, and the detection portion of the flame detection needle extends into the hood of the burner head, and the flame detection needle is electrically connected to the PLC control unit.

[0012] Preferably, the medium introduced into the gas inlet is light hydrocarbon gas.

[0013] The utility model provides a fully premixed surface burner. It has the following beneficial effects:

[0014] The expected oxygen content data is set by setting the PLC control unit, and the data is transmitted to the PID controller. The oxygen content analyzer extracts the air around the burner and analyzes the oxygen content. If the premixed gas in the burner has insufficient oxygen content, it will consume the oxygen in the surrounding air, resulting in a low oxygen content value obtained by the oxygen content analyzer. The oxygen content analyzer transmits the oxygen content information to the PID controller. According to the oxygen content information, the PID controller transmits a signal to the blower to control the blower speed and adjust the amount of air blown in, thereby achieving the effect of "full premixing". The PLC control unit is electrically connected to the gas supply device to control the amount of gas introduced, and then adjust the blower air volume through the PID controller to achieve the control of the firepower. Due to the sufficient oxygen supply of the "full premixed" gas, the flame burning around the burner does not need to stretch to the outside world to obtain oxygen, so it appears to be attached to the surface of the burner and burns, the flame is uniform, the generation of nitrogen oxides is reduced, the generation of carbon monoxide is avoided, and the energy utilization rate is improved. The burner head is woven with metal fibers, and the gap between any two points formed by the fiber weaving is ≤2mm, which can make the "fire head" of the burner head dense and uniform, make the flame temperature more uniform, avoid local high temperature, further reduce the generation of nitrogen oxides, and avoid flashback. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the transmission direction of electrical signals of the utility model.

[0017] In the figure, 1-chassis, 2-blower, 3-mounting plate, 4-combustion head, 5-igniter, 6-gas inlet, 7-oxygen content analyzer, 8-PLC control unit, 9-PID controller, 10-filter, 11-flame detection needle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood in specific circumstances.

[0020] In the description of the embodiments of the present invention, it should be noted that the terms "inside" and "outside" etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0021] See also Figure 1-2The embodiment of the utility model provides a technical solution: a full premixed surface burner, provided with a chassis blower mounting plate combustion head igniter 5, the chassis 1 inlet is connected to the blower 2, and the chassis 1 outlet is connected to the mounting plate 3, the mounting plate 3 is connected to the combustion head 4, the igniter 5 is fixed on the mounting plate 3 and ignites the combustion head 4, a gas inlet 6 is also connected between the chassis 1 and the mounting plate 3, the combustion head 4 is configured as a hood tube with one end open, and the open end is connected to the mounting plate 3, and the mounting plate 3 is provided with a hole adapted to the combustion head 4; an oxygen content analyzer 7 is fixedly installed on the mounting plate 3, and the oxygen content analyzer 7 is provided with a needle tube for extracting gas near the combustion head 4; a PLC control unit PID controller 9 is also provided, the oxygen content analyzer blower 2 is electrically connected to the PID controller 9 respectively, the PID controller 9 is electrically connected to the PLC control unit 8, and the igniter 5 is electrically connected to the PLC control unit 8. It should be noted that: in this embodiment, the PLC control unit can set the expected oxygen content data and transmit the data to the PID controller, and the oxygen content analyzer extracts the air around the burner head and analyzes the oxygen content. The oxygen content analyzer transmits the oxygen content information to the PID controller. According to the oxygen content information, the PID controller transmits a signal to the blower to control the blower speed and adjust the amount of air blown in, thereby achieving the effect of "full premixing". Since the "full premix" fuel gas has sufficient oxygen supply, the flame burning around the burner head does not need to stretch to the outside world to obtain oxygen, so it appears to be attached to the surface of the burner head and burns, the flame is uniform, the generation of nitrogen oxides is reduced, the generation of carbon monoxide is avoided, and the energy utilization rate is improved.

[0022] See also Figure 1-2 In this embodiment, the burner head 4 is woven with metal fibers, and the distance between any two points of the pores formed by the fiber weaving on the burner head 4 is ≤2mm. It should be particularly noted that metal fibers are thinner metal wires. Through the weaving of metal fibers, fine small holes are formed, which can make the "fire head" of the burner head dense and uniform, make the flame temperature more uniform, avoid local high temperature, and further reduce the generation of nitrogen oxides. At the same time, the fine pores can avoid flashback.

[0023] See also Figure 1-2 In this embodiment, the gas inlet 6 is connected to a gas supply device, and the gas supply device is electrically connected to a PLC control unit 8. It should be noted that the PLC control unit is electrically connected to the gas supply device, and can control the amount of gas introduced, and then adjust the air volume of the blower through a PID controller, thereby achieving control of the firepower.

[0024] See also Figure 1In this embodiment, the end of the blower 2 away from the housing 1 is connected with a filter 10. It should be noted that the filter adopts the structure of the prior art and is mainly used to filter hair fibers and large suspended particles in the air.

[0025] See also Figure 1-2 In this embodiment, a flame detection needle 11 is also provided, and the flame detection needle 11 is fixedly provided on the mounting plate 3, and the detection part of the flame detection needle 11 extends into the cover tube of the burner head 4, and the flame detection needle 11 is electrically connected to the PLC control unit 8. It should be particularly noted that the flame detection needle adopts the structure of the prior art, and can automatically detect the flame signal and transmit the signal to the PLC control unit without naked eye observation. When the signal transmitted by the flame detection needle to the PLC control unit is a flame-free signal, the signal can be transmitted to the igniter through the PLC control unit to continue ignition.

[0026] See also Figure 1 In this embodiment, the medium introduced into the gas inlet 6 is light hydrocarbon gas. It should be noted that light hydrocarbons usually come from petroleum, liquefied petroleum gas residues or by-products of crude oil and natural gas extraction and deep processing of petroleum. They are liquid at normal temperature and pressure. Converting such by-products into fuels for urban residents’ daily life and industrial use belongs to energy conversion projects strongly supported by the national energy comprehensive utilization policy. Its composition can be referred to in the patent number "2022229737355". The patent name "A light hydrocarbon atomization device" discloses the composition of light hydrocarbons and its atomization device. The spray formed by the atomization device is mixed with the external air in proportion to form a gas that enters the gas supply terminal through a pipeline. The gas has the characteristics of stable calorific value and easy adjustment and control.

[0027] Working principle and use process of the utility model: If the combustion head of the burner has incomplete combustion, it will consume oxygen in the surrounding space. The oxygen content in the space around the combustion head can be measured as the basis for "full premixing" adjustment. When in use, the expected oxygen content data is set by the PLC control unit, and the data is transmitted to the PID controller. The oxygen content analyzer extracts the air around the combustion head and analyzes the oxygen content. The oxygen content analyzer transmits the oxygen content information to the PID controller. According to the oxygen content information, the PID controller transmits a signal to the blower to control the blower speed and adjust the amount of air blown in, thereby achieving the effect of "full premixing". The PLC control unit is electrically connected to the gas supply device, which can control the amount of gas introduced, and then adjust the blower air volume through the PID controller, so as to achieve the control of the firepower. Since the "full premixed" gas has sufficient oxygen supply, the flame burning around the burner head does not need to stretch to the outside to obtain oxygen, so it appears to be attached to the surface of the burner head and burns. When the firepower is small, the temperature is relatively low, the gas molecules or atoms are excited at a low energy level, the wavelength is long, and it is visible to the naked eye as red light, showing an infrared radiation effect. When the firepower is strong, the temperature is relatively high, the gas molecules or atoms are excited at a high energy level, the wavelength is short, and it is visible to the naked eye as blue light, showing a blue flame effect. However, they all show a uniform flame state, avoiding local high temperature, reducing the generation of nitrogen oxides, avoiding the generation of carbon monoxide, and improving energy utilization.

[0028] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fully premixed surface burner, comprising a housing (1), a blower (2), a mounting plate (3), a combustion head (4), and an igniter (5), wherein the housing (1) inlet is connected to the blower (2), and the housing (1) outlet is connected to the mounting plate (3), the mounting plate (3) is connected to the combustion head (4), and the igniter (5) is fixed on the mounting plate (3) and ignites the combustion head (4). It is characterized in that A gas inlet (6) is also connected between the chassis (1) and the mounting plate (3); the burner head (4) is configured as a cover tube with one end open, and the open end is connected to the mounting plate (3); and the mounting plate (3) is provided with a hole adapted to the burner head (4); an oxygen content analyzer (7) is fixedly mounted on the mounting plate (3); the oxygen content analyzer (7) is provided with a needle tube for extracting gas near the burner head (4); a PLC control unit (8) and a PID controller (9) are also provided; the oxygen content analyzer (7) and the blower (2) are electrically connected to the PID controller (9) respectively, the PID controller (9) is electrically connected to the PLC control unit (8), and the igniter (5) is electrically connected to the PLC control unit (8).

2. A fully premixed surface combustion engine according to claim 1, It is characterized in that The burner head (4) is woven from metal fibers, and the distance between any two points of the pores formed by the fiber weaving on the burner head (4) is ≤2 mm.

3. A fully premixed surface combustion engine according to claim 1, It is characterized in that The gas inlet (6) is connected to a gas supply device, and the gas supply device is electrically connected to a PLC control unit (8).

4. A fully premixed surface combustion engine according to claim 1, It is characterized in that One end of the blower (2) away from the chassis (1) is connected to a filter (10).

5. A full premixed surface combustion engine according to claim 1, It is characterized in that A flame detection needle (11) is also provided, the flame detection needle (11) being fixedly arranged on the mounting plate (3), and a detection portion of the flame detection needle (11) extending into the hood of the combustion head (4), and the flame detection needle (11) being electrically connected to the PLC control unit (8).

6. A fully premixed surface burner according to any one of claims 1 to 5, It is characterized in that The medium introduced into the gas inlet (6) is light hydrocarbon gas.

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