Full-premixing condensation type fuel gas steam generator

Abstract

The utility model discloses a full-premixing condensation type fuel gas steam generator, relates to the technical field of fuel gas steam generators, and adopts the following scheme that the full-premixing condensation type fuel gas steam generator comprises a box body, a plurality of groups of heat exchange tubes are arranged in the box body, the end parts of the heat exchange tubes are connected with a combustion cavity, and a combustor is arranged in the middle of the combustion cavity; the bottom of one side of the combustion cavity is provided with an ignition needle, the bottom end of the ignition needle is provided with a premixing cavity, the bottom of the premixing cavity is communicated with a fan, one side of the fan is provided with an electromagnetic valve, the middle of the box body is provided with a water tank, and the top of the water tank is provided with a high water level probe. The steam secondary heat exchange cavity is arranged, condensation heat exchange is conducted on high-temperature flue gas through the steam secondary heat exchange cavity and the heat exchanger, the heat exchange efficiency is effectively improved through the arrangement of the multiple sets of heat exchange pipes, the combustion efficiency is effectively guaranteed through the full-premixing combustion structure, and emission of pollutants such as nitric oxide and carbon monoxide is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas steam generators, in particular to a full premixed condensing gas steam generator. Background Art

[0002] A steam generator is a burning appliance that uses fuel to heat water into steam. Natural gas, liquefied gas and manufactured gas are clean, environmentally friendly, high-quality energy sources that contain almost no sulfur, dust and other harmful substances. When burned, they produce less harmful substances than other fossil fuels, and can fundamentally improve environmental quality.

[0003] Existing gas steam generators have problems such as low heat exchange efficiency, large energy loss, incomplete combustion and easy generation of harmful substances. Therefore, a fully premixed condensing gas steam generator is needed. Utility Model Content

[0004] The utility model aims to provide a fully premixed condensing gas steam generator, which solves the problems of low heat exchange efficiency, insufficient combustion and easy generation of harmful substances in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fully premixed condensing gas steam generator, comprising a box body, wherein a plurality of groups of heat exchange tubes are arranged inside the box body, the ends of the heat exchange tubes are connected to a combustion chamber, a burner is installed in the middle of the combustion chamber, an ignition needle is installed at the bottom of one side of the combustion chamber, a premixing chamber is arranged at the bottom of the ignition needle, the bottom of the premixing chamber is connected to a fan, a solenoid valve is installed on one side of the fan, a water tank is installed in the middle of the box body, a high water level probe is installed on the top of the water tank, a low water level probe is arranged on the side of the high water level probe, a steam secondary heat exchange chamber is arranged on the top of the box body, a heat exchanger is installed on the top of the steam secondary heat exchange chamber, and a smoke exhaust pipe is installed on the top of the steam secondary heat exchange chamber.

[0006] Preferably, the outer annular portion of the combustion chamber is connected to a plurality of groups of heat exchange tubes, and the combustion chamber is connected to the top heat exchanger through the heat exchange tubes.

[0007] Preferably, the burner is ignited by an ignition needle, and the heat generated by the burner is transmitted to the top heat exchanger through a heat exchange tube.

[0008] Preferably, the solenoid valve is electrically connected to the fan.

[0009] Preferably, the water tank detects the internal liquid level height by means of a high water level probe and a low water level probe.

[0010] Preferably, the smoke inside the box is discharged to the outside through a smoke exhaust pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. By setting up the heat exchange tube, firstly, the bottom solenoid valve is used to control the fan to switch, so that the gas is fully mixed with sufficient air in the premixing chamber in front of the burner. The flame propagation speed is fast, the excess air coefficient is small, and the combustion temperature is very high. Then, the ignition on one side is controlled to ignite the burner to ensure that the burner can be ignited and used to supply heat. The heat transmission is ensured by setting up multiple groups of heat exchange tubes, effectively providing uniform heat supply, and better heating the water inside the water tank. In addition, high and low water level probes are added to better monitor the height of the internal water level, ensure timely adjustment, prevent dry burning, and ensure efficiency.

[0013] 2. By setting up a smoke exhaust pipe, and then using a steam secondary heat exchange cavity and a heat exchanger to condense and exchange heat for the high-temperature flue gas, the setting of multiple sets of heat exchange tubes effectively increases the heat exchange efficiency, and the full premixed combustion structure effectively ensures the combustion efficiency and effectively reduces the emission of pollutants such as nitrogen oxides and carbon monoxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall internal structure of a fully premixed condensing gas steam generator of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall external structure of a fully premixed condensing gas steam generator of the utility model;

[0016] Figure 3 The utility model is a fully premixed condensing gas steam generator Figure 1 Enlarged structural diagram at A in the middle.

[0017] In the figure: 1. Box body; 2. Heat exchange tube; 3. Combustion chamber; 4. Burner; 5. Ignition needle; 6. Premixing chamber; 7. Fan; 8. Solenoid valve; 9. Water tank; 10. High water level probe; 11. Low water level probe; 12. Steam secondary heat exchange chamber; 13. Heat exchanger; 14. Exhaust pipe. 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] Example 1

[0020] like Figure 1-3 As shown, a fully premixed condensing gas steam generator is shown in the figure, comprising a box body 1, characterized in that: a plurality of groups of heat exchange tubes 2 are arranged inside the box body 1, the ends of the heat exchange tubes 2 are connected to a combustion chamber 3, a burner 4 is installed in the middle of the combustion chamber 3, an ignition needle 5 is installed at the bottom of one side of the combustion chamber 3, a premixing chamber 6 is arranged at the bottom of the ignition needle 5, a fan 7 is connected to the bottom of the premixing chamber 6, a solenoid valve 8 is installed on one side of the fan 7, a water tank 9 is installed in the middle of the box body 1, a high water level probe 10 is installed on the top of the water tank 9, a low water level probe 11 is arranged on the side of the high water level probe 10, a steam secondary heat exchange chamber 12 is arranged on the top of the box body 1, a heat exchanger 13 is installed on the top of the steam secondary heat exchange chamber 12, and a smoke exhaust pipe 14 is installed on the top of the steam secondary heat exchange chamber 12.

[0021] The outer ring of the combustion chamber 3 is connected to multiple groups of heat exchange tubes 2, and the combustion chamber 3 is connected to the top heat exchanger 13 through the heat exchange tubes 2. The multiple groups ensure more uniform and efficient heating.

[0022] The burner 4 is ignited by the ignition needle 5, and the heat generated by the burner 4 is transmitted to the top heat exchanger 13 through the heat exchange tube 2, so as to effectively perform high-temperature heating and heat exchange.

[0023] The electromagnetic valve 8 is electrically connected to the fan 7 to flexibly control the air intake mixing operation to ensure safety.

[0024] The water tank 9 detects the internal liquid level height through the high water level probe 10 and the low water level probe 11, detects the water level, and adjusts it in time to prevent the danger of dry burning.

[0025] The smoke inside the box 1 is discharged outward through the smoke exhaust pipe 14, and timely smoke exhaust ensures the normal use of the equipment.

[0026] Working principle: First, the fan 7 is controlled by the bottom solenoid valve 8 to switch, so that the gas is fully mixed with sufficient air in the premixing chamber 6 in front of the burner 4. The flame propagation speed is fast, the excess air coefficient is small, and the combustion temperature is very high. Then, the burner 4 is ignited by controlling the ignition needle 5 on one side to ensure that the burner 4 can be ignited and used to supply heat. The heat transmission is ensured by the setting of multiple groups of heat exchange tubes 2, which effectively provides uniform heat supply, better heats the water inside the water tank 9, and adds high and low water level probes to better monitor the height of the internal water level, ensure timely adjustment, prevent dry burning, and help ensure efficiency.

[0027] Next, the high-temperature flue gas is condensed and heat exchanged using the steam secondary heat exchange cavity 12 and the heat exchanger 13. The arrangement of multiple groups of heat exchange tubes 2 effectively increases the heat exchange efficiency. The fully premixed combustion structure effectively ensures the combustion efficiency and effectively reduces the emission of pollutants such as nitrogen oxides and carbon monoxide.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully premixed condensing gas steam generator, comprising a housing (1), characterized in that: A plurality of groups of heat exchange tubes (2) are arranged inside the box (1), the ends of the heat exchange tubes (2) are connected to a combustion chamber (3), a burner (4) is installed in the middle of the combustion chamber (3), an ignition needle (5) is installed at the bottom of one side of the combustion chamber (3), a premixing chamber (6) is arranged at the bottom of the ignition needle (5), the bottom of the premixing chamber (6) is connected to a fan (7), and a solenoid valve (8) is installed on one side of the fan (7). A water tank (9) is installed in the middle of the box body (1), a high water level probe (10) is installed on the top of the water tank (9), a low water level probe (11) is arranged on the side of the high water level probe (10), a steam secondary heat exchange cavity (12) is arranged on the top of the box body (1), a heat exchanger (13) is installed on the top of the steam secondary heat exchange cavity (12), and a smoke exhaust pipe (14) is installed on the top of the steam secondary heat exchange cavity (12).

2. A fully premixed condensing gas steam generator according to claim 1, characterized in that: The outer ring of the combustion chamber (3) is connected to multiple groups of heat exchange tubes (2), and the combustion chamber (3) is connected to the top heat exchanger (13) through the heat exchange tubes (2).

3. A fully premixed condensing gas steam generator according to claim 1, characterized in that: The burner (4) is ignited by an ignition needle (5), and the heat generated by the burner (4) is transmitted to the top heat exchanger (13) through the heat exchange tube (2).

4. A fully premixed condensing gas steam generator according to claim 1, characterized in that: The solenoid valve (8) is electrically connected to the fan (7).

5. The fully premixed condensing gas steam generator according to claim 1, characterized in that: The water tank (9) detects the internal liquid level height via a high water level probe (10) and a low water level probe (11).

6. A fully premixed condensing gas steam generator according to claim 1, characterized in that: The smoke inside the box (1) is discharged to the outside through the smoke exhaust pipe (14).

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