Water-cooled combustion steam generator

Abstract

The utility model discloses a water -cooled combustion steam generator, including inner chamber and the communicating pipe of connecting inner chamber, one side of inner chamber is equipped with the igniter, and the other side is equipped with the flue, the end of communicating pipe is equipped with the air inlet, the inner wall of inner chamber is equipped with the membrane type wall pipe all around, and the inside of membrane type wall pipe is equipped with the finned tube, the outside of membrane type wall pipe is equipped with the steam delivery line and water flow delivery line, and the flue gas is discharged from the flue after passing membrane type wall pipe, steam delivery line and water flow delivery line in proper order, the bottom of inner chamber is equipped with the water room, and the top of inner chamber is equipped with the steam chamber, and the water room is connected with the steam chamber through membrane type wall pipe and finned tube, this water -cooled combustion steam generator can form saturated steam to the steam of producing again heating when using, can also effectively utilize the heat of high temperature flue gas, can also cool the flue gas when discharging flue gas, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and in particular to a water-cooled combustion steam generator. Background Technology

[0002] A steam boiler is an energy conversion device that heats internal water to produce steam after fuel is input into the boiler. The steam produced is used in various fields such as industrial production, public welfare, and energy utilization.

[0003] In existing steam boilers, the generators primarily heat the internal finned tubes by ejecting flames to produce steam. This steam is generally not reheated, resulting in low steam temperatures that are insufficient for operation. Furthermore, the heat from the high-temperature flue gas generated by fuel combustion cannot be effectively utilized, and directly emitting high-temperature flue gas can easily produce large amounts of white smoke, leading to unsatisfactory performance. Utility Model Content

[0004] The purpose of this invention is to solve the above problems by providing a water-cooled combustion steam generator that can reheat the generated steam to form saturated steam, effectively utilize the heat of high-temperature flue gas, and cool the flue gas during discharge.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a water-cooled combustion steam generator, comprising an inner cavity and a connecting pipe connecting the inner cavity, an igniter on one side of the inner cavity and a flue pipe on the other side, an air inlet at the end of the connecting pipe, a membrane wall tube around the inner wall of the inner cavity, a finned tube inside the membrane wall tube, a steam conveying pipe and a water conveying pipe on the outer side of the membrane wall tube, and flue gas passing through the membrane wall tube, the steam conveying pipe and the water conveying pipe in sequence before being discharged from the flue pipe.

[0006] Preferably, the bottom of the inner cavity is provided with a water chamber and the top of the inner cavity is provided with a steam chamber, and the water chamber and the steam chamber are connected by a membrane wall tube and a finned tube.

[0007] Preferably, the membrane wall tube includes pipes and a steel plate between two pipes, and the steel plate is provided with through holes.

[0008] Preferably, the steam conveying pipeline includes a meandering steam baffle, one end of which is connected to the steam chamber via a baffle bend, and the other end extends vertically upward to connect to the steam outlet.

[0009] Preferably, the water delivery pipeline includes an injection pipe and a return deflector pipe. One end of the return deflector pipe is connected to the injection pipe, and the other end extends upward and then bends downward. The bottom of the return deflector pipe is connected to the water chamber through a second deflector pipe.

[0010] Preferably, the water chamber is also provided with an outwardly extending drain pipe.

[0011] Preferably, the steam chamber is also provided with an upwardly extending safety valve interface.

[0012] This utility model discloses a water-cooled combustion steam generator, including an inner cavity and a connecting pipe connecting the inner cavity. An igniter is provided on one side of the inner cavity, and a flue pipe is provided on the other side. An air inlet is provided at the end of the connecting pipe. A membrane wall tube is provided around the inner wall of the inner cavity, and a finned tube is provided inside the membrane wall tube. A steam delivery pipe and a water delivery pipe are provided on the outer side of the membrane wall tube. The flue gas passes through the membrane wall tube, the steam delivery pipe and the water delivery pipe in sequence and is discharged from the flue pipe. A water chamber is provided at the bottom of the inner cavity, and a steam chamber is provided at the top of the inner cavity. The water chamber and the steam chamber are connected by the membrane wall tube and the finned tube. Compared with the prior art, this water-cooled combustion steam generator has the beneficial effects of being able to reheat the generated steam to form saturated steam, effectively utilizing the heat of high-temperature flue gas, and cooling the flue gas when it is discharged. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of a water-cooled combustion steam generator according to this utility model. Figure 1 .

[0014] Figure 2 This is a side view of a water-cooled combustion steam generator according to the present invention.

[0015] Figure 3 This is a schematic diagram of the membrane wall tube in a water-cooled combustion steam generator according to the present invention.

[0016] Figure 4 This is a schematic diagram of the water flow direction in a water-cooled combustion steam generator according to this utility model.

[0017] Figure 5 This is a schematic diagram of the steam flow in a water-cooled combustion steam generator according to this utility model.

[0018] Figure 6 This is a schematic diagram of the flue gas flow in a water-cooled combustion steam generator according to this utility model.

[0019] In the diagram: 1. Inner cavity; 2. Connecting pipe; 21. Air inlet; 22. Igniter; 3. Membrane wall tube; 301. Pipe; 302. Steel plate; 303. Through hole; 31. Water chamber; 311. Sewage pipe; 32. Steam chamber; 321. Safety valve interface; 33. Baffle bend one; 34. Steam baffle; 35. Steam outlet; 4. Finned tube; 5. Smoke exhaust pipe; 6. Water injection pipe; 61. Return baffle water pipe; 62. Baffle bend two. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0021] Please refer to Figure 1-2 A water-cooled combustion steam generator includes an inner cavity 1 and a connecting pipe 2 connecting the inner cavity 1. The end of the connecting pipe 2 is provided with an air inlet 21, through which air and fuel are injected by a fan. An igniter 22 is provided on one side of the inner cavity 1, and an exhaust pipe 5 is provided on the other side. Air and fuel enter the inner cavity 1 through the connecting pipe and are then ignited by the igniter 22. A membrane wall tube 3 is provided around the inner wall of the inner cavity 1. A finned tube 4 is provided inside the membrane wall tube 3. A steam delivery pipe and a water delivery pipe are provided on the outside of the membrane wall tube 3. The flue gas passes through the membrane wall tube 3, the steam delivery pipe and the water delivery pipe in sequence and is discharged from the exhaust pipe 5.

[0022] During this process, the high-temperature flue gas generated after fuel combustion will pass through steam delivery pipelines and water delivery pipelines. When passing through the steam delivery pipeline, the steam can be reheated to become saturated steam that meets the usage requirements. When the high-temperature flue gas passes through the water delivery pipeline, it can preheat the water source in the pipeline to raise the water source to a certain temperature, which is convenient for subsequent heating to generate steam. The whole process not only effectively utilizes the heat of the high-temperature flue gas, but also slows down the temperature of the emitted flue gas.

[0023] In this embodiment, the bottom of the inner cavity 1 is provided with a water chamber 31 and the top of the inner cavity 1 is provided with a steam chamber 32. The water chamber 31 and the steam chamber 32 are connected by a membrane wall tube 3 and a finned tube 4. When in use, both the membrane wall tube 3 and the finned tube 4 are provided with a water source.

[0024] like Figure 3 As shown, the membrane wall tube 3 includes a pipe 301 and a steel plate 302 between the two pipes 301. The steel plate 302 is provided with a through hole 303. The combustion chamber flame is sprayed into the interior from the through hole 303, thereby heating the water in the pipe 301 and the finned tube 4. After heating, the steam rises and enters the steam chamber.

[0025] Specifically, the steam conveying pipeline includes a detour-arranged steam baffle 34, one end of which is connected to the steam chamber 32 via a baffle bend 33, and the other end extends vertically upward to connect with the steam outlet 35; the steam chamber 32 is also provided with an upwardly extending safety valve interface 321.

[0026] The water delivery pipeline includes a water injection pipe 6 and a return deflector pipe 61. One end of the return deflector pipe 61 is connected to the water injection pipe 6, and the other end extends upward and then bends downward. The bottom of the return deflector pipe 61 is connected to the water chamber 31 through a second deflector pipe 62. In addition, the water chamber 31 is also provided with an outwardly extending sewage pipe 311.

[0027] Water flow direction as Figure 4 As shown, when in use, the water injection pipe 6 is connected to an external water source. At this time, the water source will first flow upward along the return flow deflector pipe, then flow downward and enter the water chamber through the second deflector bend pipe 62. As the external water source is continuously injected, the water in the water chamber will flow upward again and enter the pipe 301 and the finned tube 4. After the fuel is burned, it will be heated to produce steam. That is to say, the water source has three return flows, namely, first upward, then downward, and then upward again, which can effectively absorb the heat of high-temperature flue gas and reduce the flue gas temperature. Steam direction as Figure 5 As shown, after the fuel and air are ignited by the igniter 22 (ignition gun and ignition electrode), the flame is sprayed into the interior through the through hole, thereby heating the pipe 301 and the finned tube 4. After heating, the water inside generates steam, which flows upward into the steam chamber 32. Then, the steam in the steam chamber 32 will enter the steam baffle 34 through the baffle bend 33 and flow downward. Then, it bends upward and is discharged through the steam outlet 35. Smoke direction Figure 6 As shown, after fuel combustion, the flue gas will first come into contact with the steam baffle 34 through the membrane wall tube 3, and then heat the internal steam again, so that the steam becomes saturated steam that meets the usage requirements. Then, when the high-temperature flue gas passes through the water conveying pipeline, it can preliminarily heat the water source in the pipe, raise the water source to a certain temperature, and facilitate subsequent heating to generate steam. The temperature of the high-temperature flue gas can be effectively utilized. The cooled flue gas is finally discharged at the exhaust pipe 5.

[0028] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A water-cooled combustion steam generator characterized by, The device includes an inner cavity and a connecting pipe connecting the inner cavity. An igniter is provided on one side of the inner cavity and a smoke exhaust pipe is provided on the other side. An air inlet is provided at the end of the connecting pipe. A membrane wall tube is provided around the inner wall of the inner cavity. A finned tube is provided inside the membrane wall tube. A steam conveying pipe and a water conveying pipe are provided on the outside of the membrane wall tube. The flue gas passes through the membrane wall tube, the steam conveying pipe and the water conveying pipe in sequence and is discharged from the smoke exhaust pipe.

2. The water-cooled combustion steam generator of claim 1, wherein, The bottom of the inner cavity is provided with a water chamber, and the top of the inner cavity is provided with a steam chamber. The water chamber and the steam chamber are connected by a membrane wall tube and a finned tube.

3. The water-cooled combustion steam generator according to claim 2, characterized in that, The membrane wall tube includes pipes and a steel plate between two pipes, and the steel plate has through holes.

4. The water-cooled combustion steam generator according to any one of claims 1-3, characterized in that, The steam transmission pipeline includes a meandering steam baffle pipe, one end of which is connected to the steam chamber through a baffle bend, and the other end extends vertically upward to connect to the steam outlet.

5. The water cooled combustion steam generator according to any one of claims 1-3, characterized in that, The water delivery pipeline includes an injection pipe and a return deflector pipe. One end of the return deflector pipe is connected to the injection pipe, and the other end extends upward and then bends downward. The bottom of the return deflector pipe is connected to the water chamber through a second deflector pipe.

6. The water-cooled combustion steam generator according to claim 2, characterized in that, The water chamber is also equipped with a drain pipe extending outwards.

7. The water-cooled combustion steam generator according to claim 2, characterized in that, The air chamber is also equipped with an upward-extending safety valve interface.

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