CN201416888Y - Pulse regenerative burner - Google Patents

Abstract

A pulse regenerative burner, the pulse regenerative burner includes a pulse burner brick, the pulse burner brick has a combustion chamber inside, one end of the combustion chamber is connected to the furnace, the other end is connected to the gas inlet, the combustion chamber It communicates with a heat storage cavity filled with a heat storage body, the heat storage cavity is provided with an air inlet, and a high-pressure igniter is provided in the combustion chamber. The pulse regenerative burner of the utility model can be applied to heat treatment furnaces and intermittent industrial furnaces that require precise temperature control, and is applicable to a variety of gases and has a high outlet airflow velocity.

Description

Pulse regenerative burner

technical field

The utility model relates to a burner, in particular to a pulse heat storage type burner.

Background technique

Regenerative combustion technology is an energy-saving combustion technology with better energy-saving effect in the world at present. Its principle is to use a pair of burners with a heat storage body for controlled combustion. When burner A burns, burner B performs suction. After the high-temperature flue gas is sucked into burner B, the heat carried in it exchanges heat with the regenerator in burner B, so that the regenerator absorbs heat and the high-temperature flue gas cools down. After a certain period of time, the regenerator in burner B absorbs heat and becomes saturated, and the two burners switch directions. Burner A inhales and exhausts smoke, and burner B burns. When the cold air and gas inhaled by burner B burn, they are heated by the heat storage body when they pass through the heat storage body in burner B that has already absorbed heat at a high temperature. At the same time, burner A inhales and exhausts smoke, and the high-temperature flue gas exchanges heat with the regenerator of burner A to heat the regenerator of burner A. The effect of energy saving is achieved through the continuous repeated and alternate combustion and air suction of the two burners.

However, in the prior art, due to the low velocity of the flue gas from the regenerative burner, the convective heat transfer in the furnace is insufficient; and after the air and gas are mixed and burned in the furnace, the temperature of the furnace at the flame burning part will be high, which is easy to cause temperature control Inaccurate, low temperature control accuracy, and poor furnace temperature uniformity, it cannot be applied to heat treatment furnaces and batch industrial furnaces that require precise temperature control.

Contents of the invention

The utility model provides a pulse regenerative burner to solve the above-mentioned technical problems in the background technology.

The utility model relates to a pulse regenerative burner. The pulse regenerative burner includes a pulse burner brick. The pulse burner brick has a combustion chamber inside. One end of the combustion chamber is connected to the furnace, and the other end is connected to the gas inlet. , the combustion chamber communicates with a heat storage cavity filled with a heat storage body, the heat storage cavity is provided with an air inlet, and a high-pressure igniter is provided in the combustion chamber.

The gas inlet is provided with a first valve.

The air inlet is provided with a second valve, and the second valve is connected with the air supply pipe and the smoke exhaust pipe.

The second valve is a reversing valve.

The air supply duct is connected to the fan assembly.

There is also a flame detector in the combustion chamber.

The pulse regenerative burner also includes a control part, the control part includes a connected control unit and a display instrument, the control unit is connected to the flame detector of the pulse regenerative burner, the high pressure igniter, the first valve, the second The valve is connected to the fan assembly.

The control part also includes a temperature sensor arranged in the furnace, and the temperature sensor is connected with the display instrument and the control unit.

The control part also includes a pressure sensor arranged in the furnace, and the pressure sensor is connected with the display instrument and the control unit.

A new type of pulse heat storage burner of the utility model can be applied to a variety of gases, and the ratio of air to gas can reach 1:10; the outlet air velocity is high, reaching 80-120m/s; the temperature can be precisely controlled , The furnace temperature is controlled within the range of ±5°C.

Description of drawings

Fig. 1 is a schematic structural view of the pulse regenerative burner of the present invention.

Explanation of reference signs

1-pulse burner brick; 2-high pressure igniter; 3-gas inlet; 4-flame detector; 5-air inlet; 6-regenerator; 7-combustion chamber.

Detailed ways

The preferred embodiments are listed below and the technical solution of the utility model is described in detail in conjunction with the accompanying drawings.

Figure 1 is a schematic structural diagram of the pulse regenerative burner of the present invention, as shown in Figure 1, the utility model adopts an integrated design for the recovery of waste heat of the system flue gas and the combustion of gas.

The pulse regenerative burner includes a pulse burner brick 1 made of refractory material with a combustion chamber 7 inside. One end of the left and right ends of the combustion chamber 7 is connected to the furnace, and the other end is connected to the gas inlet 3, from which combustible gases such as coal gas are injected. The gas inlet 3 is provided with a first valve, which may be a solenoid valve, and the opening and closing of the gas inlet 3 is controlled by the first valve.

The bottom of the combustion chamber 7 communicates with a regenerator cavity filled with a regenerator 6, which is made of refractory material and has many small holes for gas to pass through inside. The heat storage chamber is provided with an air inlet 5, and a second valve is provided at the air inlet 5. The second valve is a reversing valve. The second valve is connected to the air supply pipe and the smoke exhaust pipe. When one pipe is opened, the other is closed. pipeline. For example, when the air supply duct is opened, the smoke exhaust duct is closed; and vice versa. The air supply duct is connected to the fan assembly, and when the air supply duct is opened, the fan assembly blows cold air into the air inlet 5 through the air supply duct and enters the heat storage chamber 7. When the exhaust pipe is opened, the waste flue gas after heat exchange is discharged from the burner through the exhaust pipe.

The combustion chamber 7 is provided with a high-voltage igniter 2 and a flame detector 4 . The flame detector 4 is used to detect whether there is a flame, and when no flame is detected, an ignition signal is output to the high-voltage igniter 2 to ignite the gas. When a flame is detected, no ignition signal is output. Therefore, the flame detector 4 and the high-pressure igniter 2 form a logical cycle to ensure that the gas is fully combusted.

When the pulse regenerative burner of the utility model is in the combustion state, the second valve controls the opening of the air supply pipe and the closing of the smoke exhaust pipe, and the fan assembly sprays air into the heat storage body 6 from the air inlet 5 . When the cold air passes through the thermal storage body 6, it is preheated to about 1000°C by the thermal storage body 6. In this state, the first valve is opened, and the gas is injected through the gas inlet 3 and mixed with the preheated air in the combustion chamber 7 . The flame detector 4 outputs an ignition signal to the high-voltage igniter 2 to ignite the gas. The gas and the hot air passing through the regenerator 6 are mixed and burned in the combustion chamber 7, and sprayed into the furnace cavity at a speed of nearly 100m/s, causing strong heat exchange and agitation in the furnace cavity.

When the pulse regenerative burner is in the heat storage state, the first valve is closed, the second valve controls the opening of the smoke exhaust pipe, and the air supply pipe is closed. The high-temperature flue gas in the furnace passes into the regenerator 6 through the combustion chamber 7 in the pulse burner brick 1. The regenerator 6 absorbs the heat of the flue gas and the temperature rises. After the flue gas releases heat, the temperature drops to 150 degrees. Inlet 5 exhaust pipe exhaust. By switching the combustion state and heat storage state of the pulse regenerative burner at high frequency, the exhaust gas temperature of the heat treatment furnace can be controlled at about 150 degrees.

The pulse regenerative burner may also include a control part (not shown), and the control part includes a connected control unit and a display instrument. The control unit is connected with the flame detector 4, the high pressure igniter 2, the first valve, the second valve and the fan assembly. The control part also includes a temperature sensor and a pressure sensor arranged in the furnace, and the temperature and pressure sensors The sensor is connected with the display instrument and the control unit, and displays the temperature and pressure changes in the furnace to the user through the display instrument, and at the same time feeds back to the control unit, and automatically adjusts the furnace temperature and pressure through the control unit. The control unit adopts PLC control, and adjusts the ignition components, valve components, fan components and control time according to the change data of temperature and pressure in the furnace obtained by the sensor.

The pulse regenerative burner of the utility model adopts the combination of regenerative combustion technology and pulse combustion technology, so that the regenerative combustion technology can be applied to heat treatment furnaces and intermittent industrial furnaces that require precise temperature control. The burner of the utility model has a wide adjustment range and can be applied to a variety of gases, and the ratio of air to gas can reach 1:10; the outlet air velocity is high, reaching 80-120m/s; the furnace temperature is precisely controlled at ±5°C In the range. The pulse regenerative burner of the utility model can greatly improve the heating efficiency, save fuel, improve the temperature uniformity of the workpiece, improve the life of the lining of the heat treatment furnace, reduce the emission of harmful gases, and is safe in operation, highly efficient and environmentally friendly.

The above description of the utility model is illustrative rather than restrictive. Those skilled in the art understand that many modifications, changes or equivalents can be made to it within the spirit and scope of the claims, but they will all fall into the Into the scope of protection of the present utility model.

Claims (9)

1. A pulse regenerative burner, characterized in that the pulse regenerative burner includes a pulse burner brick, which has a combustion chamber inside, one end of the combustion chamber is connected to the furnace, and the other end is connected to the Gas inlet, the combustion chamber communicates with a regenerator chamber filled with regenerators, the regenerator chamber is provided with an air inlet, and a high-pressure igniter is provided in the combustion chamber. 2. The pulse regenerative burner according to claim 1, characterized in that a first valve is provided at the gas inlet. 3. The pulse regenerative burner according to claim 2, characterized in that a second valve is provided at the air inlet, and the second valve connects the air supply pipe and the smoke exhaust pipe. 4. The pulse regenerative burner according to claim 3, wherein the second valve is a reversing valve. 5. The pulse regenerative burner according to claim 3, characterized in that the air supply duct is connected to a fan assembly. 6. The pulse regenerative burner according to claim 5, characterized in that a flame detector is also installed in the combustion chamber. 7. The pulse regenerative burner according to claim 6, characterized in that the pulse regenerative burner also includes a control part, the control part includes a connected control unit and a display instrument, the control unit and the pulse The flame detector of the regenerative burner, the high-pressure igniter, the first valve, the second valve and the blower assembly are connected. 8. The pulse regenerative burner according to claim 7, characterized in that the control part further includes a temperature sensor arranged in the furnace, and the temperature sensor is connected with the display instrument and the control unit. 9. The pulse regenerative burner according to claim 7, characterized in that the control part further includes a pressure sensor arranged in the furnace, and the pressure sensor is connected with the display instrument and the control unit.

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