A burner structure for a gas heating device for dyeing and printing vats

Abstract

This utility model discloses a burner structure for a gas-fired heating device for a dyeing vat, relating to the field of burner technology. It includes a main body for the dyeing vat gas-fired heating device, comprising a ring pipe and a combustion tube. The ring pipe has a flue gas outlet, and the combustion tube contains a burner assembly. An air inlet is provided on the combustion tube to supply combustion air to the burner assembly. It also includes a combustion air input pipe, one end of which is connected to the air inlet to supply combustion air to the air inlet; and a waste heat recovery mechanism. The waste heat recovery mechanism of this utility model extracts and reuses the residual heat from the flue gas discharged from the exhaust port of the dyeing vat gas-fired heating device for preheating the combustion air supplied to the air inlet. This results in higher combustion efficiency of the burner, making it more energy-efficient than ordinary burners without air preheating. Furthermore, the waste heat recovery and reuse at the exhaust port reduces heat loss.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a burner structure for a gas heating device for dyeing and printing vats. Background Technology

[0002] As a traditional high-energy-consuming industry, the dyeing and printing industry faces enormous pressure to reduce carbon emissions. Most regions are promoting the use of clean energy, thus creating a significant need for upgrading and retrofitting production enterprises that rely on coal-fired boilers. Currently, to reduce energy loss and environmental pollution, gas-fired heating devices for dyeing vats are being used.

[0003] In the prior art, application number CN202411170850.6, patent title: Gas Heating Device for Dyeing and Printing Vat, the device should have the characteristics of small size, low energy consumption, and safety and reliability. The technical solution is a gas heating device for dyeing and printing vats, including a heat exchange unit and a combustion unit; the heat exchange unit has a first channel and a second channel arranged internally and externally, and several heat exchange tubes passing through both the first and second channels; one side of the heat exchange unit has a water inlet, and the other side has a water outlet, a flue gas inlet, and a flue gas outlet; the flue gas inlet, the first channel, the second channel, and the flue gas outlet are connected sequentially, and the flue gas flow directions of the first and second channels are opposite; the combustion unit is connected to the flue gas inlet; the water inlet, the heat exchange tubes, and the water outlet are connected sequentially. Although this scheme uses a combustion unit to heat the gas, the combustion air entering the burner assembly is not preheated. When the combustion air enters the combustion chamber from the inlet, its temperature is very low, requiring it to absorb a large amount of heat. This results in incomplete combustion of the gas, affecting the system's energy conversion and increasing the energy consumption of the dyeing vat gas heating device. Furthermore, the exhaust gas still carrying residual heat causes heat loss. Therefore, to improve energy conversion efficiency and recover the still-warm exhaust gas for reuse, we need to technically improve the burner structure of the dyeing vat gas heating device.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a burner structure for a gas heating device for dyeing and printing vats. Utility Model Content

[0005] The purpose of this invention is to provide a burner structure for a gas heating device for a dyeing and printing vat that can preheat the combustion air entering the burner assembly in order to improve energy conversion efficiency and reduce heating energy consumption.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a burner structure for a gas-fired heating device for a dyeing vat, comprising a main body of the dyeing vat gas-fired heating device, the main body having a ring pipe and a combustion pipe, the ring pipe having a flue gas outlet, the combustion pipe having a burner assembly, and the combustion pipe having an air inlet for supplying combustion air to the burner assembly, and further comprising:

[0008] A combustion air inlet pipe, one end of which is connected to the air inlet for supplying combustion air to the air inlet; and

[0009] A waste heat recovery mechanism is provided between the exhaust port and the combustion air input pipe to preheat the combustion air in the combustion air input pipe using the waste heat from the exhaust port.

[0010] Furthermore, the combustion air input pipe is connected to the air inlet by a flange.

[0011] Furthermore, the waste heat recovery mechanism includes a heat exchange coil installed in the combustion air input pipe. The two ends of the heat exchange coil are respectively connected to an outlet pipe and an exhaust pipe. The other end of the outlet pipe extends out of the combustion air input pipe and connects to the exhaust port. The other end of the exhaust pipe extends out of the combustion air input pipe to discharge the heat-exchanged flue gas.

[0012] Furthermore, the heat exchange coil is arranged along the extension direction of the combustion air input pipe.

[0013] Furthermore, a branch pipe is connected to the side wall of the exhaust port, and one end of the outlet pipe extending out of the combustion air input pipe is flangedly connected to the branch pipe of the exhaust port.

[0014] Furthermore, the outlet pipe and the discharge pipe are sealed together with the portion extending from the combustion air input pipe.

[0015] This utility model has the following beneficial effects.

[0016] The waste heat recovery mechanism of this utility model draws out the residual heat of the flue gas emitted from the exhaust port of the gas heating device for dyeing and printing vat and reuses it for preheating the combustion air introduced into the air inlet, so that the burner has a higher combustion efficiency for the gas and is more energy-efficient than ordinary burners without air preheating. Furthermore, by adopting the form of waste heat recovery and reuse at the exhaust port, heat loss is reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the burner structure of a gas heating device for a dyeing vat provided in this embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram showing the distribution between the combustion air input pipe and the heat exchange coil of the burner structure of a gas heating device for a dyeing vat provided in this embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Main body of the gas heating device for dyeing and printing vat; 2. Ring pipe; 3. Combustion pipe; 4. Exhaust port; 5. Air inlet; 6. Combustion air input pipe; 7. Heat exchange coil; 8. Outlet pipe; 9. Discharge pipe; 10. Branch pipe. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, a further detailed description of this utility model will be provided below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] See Figures 1 to 2 As shown;

[0024] This embodiment discloses a burner structure for a gas-fired heating device for a dyeing vat, including a main body 1. The main body 1 is based on a patented technology cited in the background art. This application will technically modify the burner structure of the main body 1. The main body 1 has a ring pipe 2 and a combustion pipe 3. A flue gas outlet 4 is provided on the ring pipe 2. The relatively low-temperature air after heat exchange in the main body 1 still carries residual heat and is discharged from the flue gas outlet 4. The combustion pipe 3 contains a burner assembly, and an air inlet 5 is provided on the combustion pipe 3 to introduce combustion air into the burner assembly. The device also includes:

[0025] Combustion air inlet pipe 6, one end of which is connected to air inlet 5 to supply combustion air to air inlet 5, is essentially an extension of the pipe section of air inlet 5. This allows the equipment originally used to inject combustion air into air inlet 5 to be connected to combustion air inlet pipe 6, so that combustion air can be supplied to air inlet 5 through combustion air inlet pipe 6; and

[0026] The waste heat recovery mechanism is located between the exhaust port 4 and the combustion air input pipe 6. It uses the residual heat of the exhaust gas discharged from the exhaust port 4 to preheat the combustion air in the combustion air input pipe 6. The preheated air is then transported to the air inlet 5 through the combustion air input pipe 6 to improve the combustion efficiency of the burner assembly. This not only avoids heat loss but also improves the heating efficiency of the burner assembly. Compared with the existing dyeing vat gas heating device body 1, it saves more energy.

[0027] Furthermore, the combustion air input pipe 6 and the air inlet 5 are connected by a flange so that the combustion air input pipe 6 and the air inlet 5 are connected.

[0028] Furthermore, the waste heat recovery mechanism includes a heat exchange coil 7 installed in the combustion air input pipe 6. The two ends of the heat exchange coil 7 are respectively connected to an outlet pipe 8 and an exhaust pipe 9. The other end of the outlet pipe 8 extends out of the combustion air input pipe 6 and connects to the exhaust port 4. The other end of the exhaust pipe 9 extends out of the combustion air input pipe 6 to discharge the heat-exchanged flue gas.

[0029] Specifically, a portion of the still-heated flue gas emitted from the exhaust port 4 is drawn out through the lead-out pipe 8 and transported to the heat exchange coil 7 inside the combustion air input pipe 6. Finally, it is discharged to the outside through the exhaust pipe 9. The heat exchange coil 7 radiates heat energy outward through heat conduction. During this process, the combustion air input pipe 6 continuously introduces combustion air. The combustion air is preheated through heat exchange with the heat exchange coil 7, and then the preheated combustion air is delivered to the air inlet 5 for use through the combustion air input pipe 6.

[0030] The rate at which the heat exchange coil 7, the outlet pipe 8, and the discharge pipe 9 transport flue gas with residual heat can be regulated by installing a negative pressure device at the end of the discharge pipe 9 to control the rate at which the flue gas is transported outward in order to meet the heat exchange efficiency requirements.

[0031] Furthermore, the heat exchange coil 7 is arranged along the extension direction of the combustion air input pipe 6 so that the combustion air in the combustion air input pipe 6 undergoes heat exchange through the heat exchange coil 7 during the transportation process along the combustion air input pipe 6.

[0032] Furthermore, a branch pipe 10 is connected to the side wall of the flue gas outlet 4. One end of the outlet pipe 8 extends out of the combustion air input pipe 6 and is flangedly connected to the branch pipe 10 of the flue gas outlet 4, so that the outlet pipe 8 is connected to the flue gas outlet 4 through the branch pipe 10 to draw out the flue gas with residual heat in the flue gas outlet 4.

[0033] Furthermore, the connection between the outlet pipe 8 and the outlet pipe 9 and the portion extending from the combustion air inlet pipe 6 can be sealed using a sealing ring to ensure that the delivery pressure of the combustion air inlet pipe 6 is not affected.

[0034] In the above technical solution, the burner structure of the gas heating device for dyeing vat provided by this utility model has the following beneficial effects:

[0035] The waste heat recovery mechanism of this utility model draws out the residual heat of the flue gas emitted from the exhaust port of the gas heating device for dyeing and printing vat and reuses it for preheating the combustion air introduced into the air inlet, so that the burner has a higher combustion efficiency for the gas and is more energy-efficient than ordinary burners without air preheating. Furthermore, by adopting the form of waste heat recovery and reuse at the exhaust port, heat loss is reduced.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A burner structure for a gas heating device for a dyeing vat, comprising a main body (1) of the dyeing vat gas heating device, wherein the main body (1) has a ring pipe (2) and a combustion pipe (3), wherein the ring pipe (2) is provided with a smoke exhaust port (4), the combustion pipe (3) contains a burner assembly, and the combustion pipe (3) is provided with an air inlet (5) to introduce combustion air into the burner assembly, characterized in that, Also includes: A combustion air inlet pipe (6), one end of which is connected to the air inlet (5) for supplying combustion air to the air inlet (5); and A waste heat recovery mechanism is provided between the exhaust port (4) and the combustion air input pipe (6) to preheat the combustion air in the combustion air input pipe (6) using the waste heat from the exhaust port (4).

2. The burner structure of the gas heating device for a dyeing vat according to claim 1, characterized in that, The combustion air input pipe (6) and the air inlet (5) are connected by a flange.

3. The burner structure of the gas heating device for a dyeing vat according to claim 1, characterized in that, The waste heat recovery mechanism includes a heat exchange coil (7) installed in the combustion air input pipe (6). The two ends of the heat exchange coil (7) are respectively connected to an outlet pipe (8) and an exhaust pipe (9). The other end of the outlet pipe (8) extends out of the combustion air input pipe (6) and connects to the flue gas outlet (4). The other end of the exhaust pipe (9) extends out of the combustion air input pipe (6) to discharge the heat-exchanged flue gas.

4. The burner structure of the gas heating device for a dyeing vat according to claim 3, characterized in that, The heat exchange coil (7) is arranged along the extension direction of the combustion air input pipe (6).

5. The burner structure of the gas heating device for a dyeing vat according to claim 3, characterized in that, A branch pipe (10) is connected to the side wall of the exhaust port (4), and the end of the outlet pipe (8) extending out of the combustion air input pipe (6) is flangedly connected to the branch pipe (10) of the exhaust port (4).

6. The burner structure of the gas heating device for a dyeing vat according to claim 3, characterized in that, The outlet pipe (8) and the discharge pipe (9) are sealed together with the portion extending from the combustion air input pipe (6).

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