Single-medium adaptive hot-air knife pressure-regulating combustion system

Abstract

A single medium adaptive hot air knife pressure regulating combustion system, the inside of the burner body is provided with a mixed air duct, a air supply duct, and an air fuel ratio valve air supply duct, the inside of the mixed air duct is provided with a wind baffle and a gas inlet pipeline, a gas flow regulating valve is installed on the gas inlet pipeline inlet for external connection of a gas supply system; a combustion premixing port is installed on the gas pipeline outlet; an ignition electrode mounting seat is installed on the combustion cylinder, an ignition electrode is installed on the ignition electrode mounting seat, a flame detector connector is welded on one end of the combustion cylinder, and a flame detector is installed on the flame detector connector; the air fan air is blown into the valve body inside the air fuel ratio valve air supply duct, the gas is connected with the flow regulating valve, and the combustion air is completely mixed at the mixing port, and the air supply duct, the mixed air duct, and the air fuel ratio valve air supply duct are connected to the air outlet of the air fan. The combustion medium variable can be reduced, the flame stability is improved, the temperature fluctuation is low, the temperature rises quickly, and the temperature control is accurate.

Description

Technical Field

[0001] This utility model relates to the field of industrial combustion technology, and in particular to a single-medium adaptive hot air knife pressure regulating combustion system. Background Technology

[0002] Traditional hot air knife combustion systems, suitable for industrial applications such as hot air shrinking, plush blowing and shaping, and drying of imitation animal fur surfaces, require multiple media supplies for ignition, including compressed air, natural gas, and high-pressure blower-assisted combustion air. During ignition, a mixer is needed to control the ratio of compressed air to natural gas, making the ignition process complex. Controlling different temperatures requires manual adjustment of the mixer opening, and a large amount of combustion gas is supplied by the high-pressure blower, resulting in significant resource consumption. Combustion stability is greatly affected by the mixing ratio and the multiple media inputs, leading to large temperature fluctuations during operation. Real-time temperature monitoring is necessary, and temperature adjustment relies on manual experience, resulting in slow response times. This causes significant waste of human resources during production, severely impacting output. Therefore, a single-media adaptive hot air knife pressure-regulating combustion system is proposed. Summary of the Invention

[0003] The technical problem to be solved by this invention is to address the shortcomings of the existing technology by proposing a single-medium adaptive hot air knife pressure regulating combustion system that reduces combustion medium variables and improves flame stability.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution: a single-medium adaptive hot air knife pressure regulating combustion system, including a burner body and a gas supply system, characterized in that: the burner body is provided with a mixing duct and an air supply duct inside; the mixing duct is provided with a baffle plate and a gas inlet pipe; a gas flow regulating valve is installed at the inlet of the gas inlet pipe for connecting to an external gas supply system; a combustion premixing port is installed at the outlet of the gas pipe; an ignition electrode mounting seat is installed on the combustion cylinder, and an ignition electrode is installed on the ignition electrode mounting seat; a flame detector connector is welded to one end of the combustion cylinder, and a flame detector is installed on the flame detector connector; the air supply duct and the mixing duct are connected to the outlet of the fan; and a gas flow regulating valve is installed on the gas supply system.

[0005] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: The gas supply system consists of an inlet connector, a gas pressure regulating valve, a gas filter chamber, a gas ball valve, an air-gas proportional valve, an electromagnetic shut-off valve, and a series of sequentially sealed connections. A high-pressure blower is connected to the air-gas proportional valve via an air branch, and then connected to the flow regulating valve on the burner body via a gas bellows. Gas is driven into the pipeline by the high-pressure blower, and the flow rate of the mixed gas is regulated and controlled by the flow regulating valve. The flow regulating valve is connected to an electric actuator, which is controlled by a PLC. By comparing the actual temperature fed back by the temperature controller with the set temperature, the electric actuator drives the flow regulating valve to automatically adjust the flow rate.

[0006] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: the gas supply system is connected to the air outlet of the blower through a direct connection pipeline, and the air blown out by the blower is directly mixed with natural gas.

[0007] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: an electric actuator mounting base is welded on the air supply duct, and the electric actuator is installed on the air supply duct by bolts. The electric actuator is connected to the flow regulating valve through a screw and a rod end joint bearing to control the stability of the mixing ratio of natural gas and air.

[0008] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: the flame guard tube of the burner body is fixed to the combustion cylinder by bolts, the flared mouth of the burner nozzle is welded to the gas pipeline, and the gas pipeline is welded to the center of the mixing air duct.

[0009] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: the flame detector is installed on the combustion cylinder through a flame detector mounting tube, the flame sensor is connected to the PLC control system through a controller, and the PLC control system is electrically connected to the solenoid valve on the natural gas pipeline.

[0010] Compared with the prior art, this utility model abandons the original hot air knife multi-media combustion system and eliminates the use of compressed air. The high-pressure air blown out by the original fan is divided into three paths: one path is used to supply the air proportioning valve to mix with the gas and produce a mixed gas with a relatively higher pressure than the fan; one path of high-pressure air is used for the air pressure required for production; and one path of high-pressure air is used for combustion support. This not only reduces energy consumption but also saves more manpower, greatly improves the working efficiency of the hot air knife combustion system, and allows for better control of the key components on the hot air knife.

[0011] This invention can reduce the variation of combustion medium, improve flame stability, reduce temperature fluctuations, accelerate heating, and provide precise temperature control. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the burner system of this utility model;

[0013] Figure 2 This is a schematic diagram of the gas supply system of this utility model;

[0014] Figure 3 This is a schematic diagram of the burner body structure of this utility model;

[0015] 1. Gas supply system; 2. Burner body; 1-1 Gas ball valve; 1-2 Gas pressure gauge; 1-3 Pressure gauge connection pipe; 1-4 Pressure regulating valve; 1-5 Gas filter; 1-6 Butterfly ball valve; 1-7 Air-fuel proportional valve; 1-8 Solenoid valve; 1-9 Mixed gas pressure gauge; 2-1 High-pressure blower; 2-2 Duct interface; 2-3 Pressure transmitter connection pipe; 2-4 Pressure transmitter; 2-5 Electric actuator; 2-6 Electric actuator mounting plate; 2-7 Damper rocker arm; 2-8 Damper; 2-9 Damper shaft; 2-10 Sealing sleeve; 2-11 Flange 1; 2-12 Flow regulating valve; 2-13 Proportional valve handle; 2-14 Flow regulating valve mounting pipe; 2-15 Mixed gas pipe; 2-16 Mixed air duct; 2-17 Air supply duct; 2-18 Flange 2; 2-19 Ignition electrode. 2-20 Premixing port, 2-21 Flame detector, 2-22 Flame detector mounting tube, 2-23 Flame observation port, 2-24 Combustion tube. Detailed Implementation

[0016] The specific technical solutions of the present invention are further described below. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, and to facilitate a better understanding of the present invention by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments, and do not constitute a limitation on its rights. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1Gas supply system 1 connects to gas pressure gauge via gas ball valve 1-1. The gas pressure gauge, installed on pressure gauge connector 1-3, displays the total gas source pressure. Gas pressure is regulated via pressure regulating valve 1-4 to reach the target value. After passing through gas filter 1-5, it enters a branch and then through butterfly handle ball valve 1-6 into the air-fuel proportional valve. The air-fuel proportional valve contains only gas and cannot reach its operating state. High-pressure blower is activated, and high-pressure air is divided into three paths through burner body 2. One path enters air-fuel proportional valve 1-7. At this point, the mixture pressure gauge 1-9 is observed, and air-fuel proportional valve 1-7 is adjusted to a pressure higher than the blower pressure to achieve adaptive temperature regulation. The mixture is then output after passing through solenoid valve and enters burner body 2.

[0018] like Figure 2 2-12 The flow regulating valve is connected to the gas supply system. 2-22 The flame detector mounting pipe is welded to 2-24 The combustion cylinder. 2-21 The flame detector is installed on 2-22 The flame detector mounting pipe through a threaded connection. 2-21 The flame detector is connected to the PLC system through the controller. The PLC control system is connected to the solenoid valve on the natural gas pipeline.

[0019] like Figure 3 2-16 The mixing duct is fixed inside the 2-17 supply air duct by flange welding. 2-15 The mixing gas pipe is welded to the center of the 2-17 supply air duct. 2-14 The flow regulating valve mounting pipe is connected to the 2-15 mixing gas pipe by thread and welded to the outside of the 2-17 supply air duct. 2-12 The gas flow regulating valve is threaded to the 2-14 gas flow regulating valve mounting pipe. 2-13 The proportional valve handle is installed and linked to the 2-5 electric actuator by the 2-7 damper rocker arm. 2-17 The supply air duct is connected to the 2-24 combustion cylinder by flange bolts. 2-19 The ignition electrode is installed on the 2-24 combustion cylinder. 2-20 The premixing port is installed at the right end of the 2-16 mixing duct by set screw.

[0020] The gas supply system is directly connected to the air outlet of the blower, and uses the air blown out by the blower to mix directly with natural gas, eliminating the need for compressed air.

[0021] The air-fuel proportional valve is a semi-finished product. After modifying its internal structure, the output pressure of the air-fuel proportional valve is sufficient to be compatible with the adaptive pressure regulation range.

[0022] The high-pressure blower is connected to the air branch of the air proportional valve. The air proportional valve structure ensures that the pressure of the mixed gas output by the high-pressure blower and the air proportional valve is always higher than the blower pressure, thus preventing the gas mixture from being backflowed by the high-pressure blower.

[0023] An electric actuator mounting base is welded onto the air supply duct. The electric actuator is installed on the air supply duct by bolts. The electric actuator is connected to the flow regulating valve through a screw and a rod end bearing to control the stability of the natural gas to air mixing ratio. Under normal circumstances, the natural gas to air ratio is between 1:10 and 1:25. The specific mixing ratio can be optimized according to the combustion effect.

[0024] The combustion premixing port achieves fuel atomization without auxiliary media through the Venturi effect.

[0025] The burner body flame shield is fixed to the combustion cylinder with bolts, making it adjustable to ensure that the flame is a straight flame and centered in the combustion cylinder. The burner nozzle flare is welded to the gas pipeline, which is welded to the center of the mixing duct.

[0026] The flame detector is mounted on the combustion chamber via a flame detector mounting pipe. The flame sensor is connected to the PLC control system via a controller. The PLC control system is electrically connected to the solenoid valve on the natural gas pipeline. When the flame sensor detects a non-working state, it automatically cuts off the gas supply.

[0027] Working Principle: A single-medium adaptive hot air knife pressure regulating combustion system includes 1 a gas supply system and 2 a burner body. High-pressure air is blown out by a fan and enters the burner from the left side, entering the 2-2 air duct interface, the 2-15 mixing air duct, and the 2-17 supply air duct respectively. One path enters the 1-7 air-fuel proportional valve. At this time, observe the 1-9 mixture pressure gauge and adjust the 1-7 air-fuel proportional valve to adjust the pressure to be higher than the fan pressure to achieve adaptive temperature regulation. The mixture is output after passing through the solenoid valve and enters the 2 burner body, where it is completely mixed with the combustion air at the 2-20 premixing port. At this time, the 2-5 electric actuator and the 2-8 damper are in the minimum position, controlling the 2-19 ignition electrode to ignite the mixture. This is the master flame, which is in the 2-24 combustion chamber and comes into contact with the high-pressure air from the 2-17 supply air duct. After complete combustion, it is discharged from the right side of the 2-24 combustion chamber.

[0028] The temperature required for hot air knife production is controlled by adjusting the angle of the 2-8 damper and the opening of the 2-12 flow regulating valve to ensure that the air-gas mixture ratio is within a reasonable range.

[0029] The 2-21 flame detector installed on the 2-24 combustion chamber can sense the combustion status of the flame in the 2-24 combustion chamber and transmit the data to the PLC control system, thereby controlling the on / off state of the burner's gas valve and ensuring the stable operation of the combustion system. This allows the entire equipment to achieve excellent production results during use.

Claims

1. A single-medium adaptive hot air knife pressure regulating combustion system, comprising a burner body and a gas supply system, characterized in that: The burner body has a mixing duct and an air supply duct inside. The mixing duct has a baffle plate and a gas inlet pipe. The gas inlet pipe is equipped with a gas flow regulating valve for connecting to an external gas supply system. The gas outlet pipe is equipped with a combustion premixing port. An ignition electrode mounting base is installed on the combustion cylinder, and an ignition electrode is installed on the ignition electrode mounting base. A flame detector connector is welded to one end of the combustion cylinder, and a flame detector is installed on the flame detector connector. The air supply duct and the mixing duct are connected to the air outlet of the fan. The gas supply system is equipped with a gas flow regulating valve.

2. The single-medium adaptive hot air knife pressure regulating combustion system according to claim 1, characterized in that: The gas supply system consists of an inlet connector, a gas pressure regulating valve, a gas filter chamber, a gas ball valve, an air-gas proportional valve, a solenoid shut-off valve, and a threaded sealing connection. The high-pressure blower is connected to the air-gas proportional valve via an air branch, and then to the flow regulating valve on the burner body via a gas bellows. The gas is driven into the pipeline by the high-pressure blower, and the flow rate of the mixed gas is regulated and controlled by the flow regulating valve. The flow regulating valve is connected to an electric actuator and controlled by a PLC. By comparing the actual temperature fed back by the temperature controller with the set temperature, the electric actuator drives the flow regulating valve to automatically adjust the flow rate.

3. The single-medium adaptive hot air knife pressure regulating combustion system according to claim 2, characterized in that: The gas supply system is connected to the outlet of the high-pressure blower via a direct pipeline, and the air blown out by the blower is directly mixed with the natural gas.

4. The single-medium adaptive hot air knife pressure regulating combustion system according to claim 1, characterized in that: An electric actuator mounting base is welded onto the air supply duct. The electric actuator is mounted on the mounting base with bolts, thereby installing the electric actuator on the air supply duct. The electric actuator is connected to the flow regulating valve through a screw and a rod end bearing to control the stable mixing ratio of natural gas and air.

5. The single-medium adaptive hot air knife pressure regulating combustion system according to claim 1, characterized in that: The flame detector is connected to a PLC control system via a controller, and the PLC control system is electrically connected to a solenoid valve on the natural gas pipeline.

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