Spraying falling film type gas steam generator

Abstract

The utility model discloses a spraying falling film type fuel gas steam generator which comprises a furnace body cylinder body, a gas inlet pipe and a gas outlet pipe, wherein a steam outlet is formed in the top of the furnace body cylinder body; the two smoke boxes are arranged at the two ends of the furnace body barrel, the two smoke boxes are connected through a first smoke pipe, and each smoke box comprises a front smoke box fixedly connected to one end of the furnace body barrel; the furnace pipe is arranged in the furnace body barrel, one end of the furnace pipe is fixedly connected with a reversal chamber, and the front smoke box is connected with the reversal chamber through a second smoke pipe. The energy-saving and environment-friendly boiler has the advantages that hot air and natural gas generated after combustion release heat and become smoke, and the smoke moves along an S-shaped path in the furnace body barrel, so that heat is in full contact with water mist, and the energy-saving and environment-friendly boiler is energy-saving and environment-friendly; the heat utilization rate is improved; the first smoke pipe and the second smoke pipe are arranged in an up-and-down staggered mode, shielding between the first smoke pipe and the second smoke pipe is prevented, the spraying area is prevented from being limited, and the heat exchange efficiency is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas steam generators, in particular to a spray falling film type gas steam generator. Background Technique

[0002] The traditional gas steam generator consists of a burner Z and a steam generator E; the steam generator E contains components such as a tube box, a shunt cover, a tube bundle group, a steam generator cylinder body, a furnace chamber, and a tube box. Working principle of the traditional gas steam generator: Natural gas passes through the internal fan of the burner Z and the combustion-supporting fan, and then ignition operation is carried out under a certain ratio. After full combustion, it passes through the shunt cover, the furnace chamber, inside the tubes of the tube bundle group, the tube box, and indirectly exchanges heat with the softened water in the tube box and the steam generator cylinder body. The softened water absorbs heat to generate water vapor; the air and natural gas after full combustion release heat and turn into flue gas, which is discharged to the high altitude.

[0003] In the traditional gas steam generator, heat and water mist cannot effectively and fully contact, resulting in a low heat exchange area, high energy consumption and low heat transfer coefficient; due to the existence of a certain liquid column of softened water, the boiling point of the softened water at the bottom of the steam generator cylinder body rises. The increase in boiling point means that a higher temperature is required to generate steam, which may lead to an increase in the energy consumption of the steam generator. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spray falling film type gas steam generator to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A spray falling film type gas steam generator, including:

[0006] A furnace body cylinder with a steam outlet at the top;

[0007] A smoke box, there are two smoke boxes and they are placed at both ends of the furnace body cylinder. The two smoke boxes are connected by a first smoke pipe. The smoke box includes a front smoke box fixedly connected to one end of the furnace body cylinder;

[0008] A furnace liner, the furnace liner is placed inside the furnace body cylinder. One end of the furnace liner is fixedly connected with a return combustion chamber. The front smoke box and the return combustion chamber are connected by a second smoke pipe;

[0009] A burner cover, the burner cover is placed at the end of the furnace liner. A burner is installed at one end of the burner cover. The output end of the burner is fixedly connected with a shunt cover. A tail gas inlet pipe is installed on the side of the burner cover;

[0010] A spray pipe, the spray pipe is placed inside the burner and is used for atomizing softened water to quickly generate water vapor by absorbing heat.

[0011] Preferably, the front smoke box is located above the burner cover. The smoke box further includes a rear smoke box which is fixedly connected to one end of the furnace body cylinder away from the front smoke box. The first smoke pipe is fixedly connected between the front smoke box and the rear smoke box.

[0012] Preferably, the rear smoke box is of an arc-shaped structure. The first smoke pipes are located at both ends of the rear smoke box, and the first smoke pipes and the second smoke pipes are arranged in a staggered manner up and down.

[0013] Preferably, bellows expansion joints are provided in the middle of both the first smoke pipe and the second smoke pipe.

[0014] Preferably, a water inlet pipe is installed at the top of the furnace body cylinder, and the bottom of the water inlet pipe is connected to a spray pipe.

[0015] Preferably, fins are installed at one end of both the recirculation chamber and the burner.

[0016] Preferably, an exhaust pipe is installed at one end of the burner and below the rear smoke box.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the settings of the burner and the flow dividing cover, the air flow mixing is strengthened, the dispersion of the fuel is promoted, and the full combustion of the fuel is ensured, thereby improving the combustion efficiency; The hot air and natural gas after combustion release heat and turn into flue gas, which travels along an S-shaped path inside the furnace body cylinder, enabling the heat to fully contact the water mist and improving the utilization rate of the heat; The first smoke pipes and the second smoke pipes are arranged in a staggered manner up and down, preventing mutual occlusion and avoiding limited spray area, further ensuring the heat exchange efficiency; Bellows expansion joints are provided in the middle of the first smoke pipe and the second smoke pipe, and a bellows expansion joint is provided in the middle of the furnace lining. These designs effectively reduce the thermal expansion difference caused by temperature differences, avoid strength failure, instability failure, and tube pull-off failure, and enhance the safety and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic distribution structural diagram of the first smoke pipe and the second smoke pipe of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the fin of the present utility model;

[0021] Figure 4 is a schematic structural diagram of the furnace lining of the present utility model.

[0022] In the figure: 1. Burner; 2. Furnace body cylinder; 3. Front smoke box; 4. Rear smoke box; 5. Furnace drum; 6. First smoke tube; 7. Tail gas inlet pipe; 8. Burner cover; 9. Spray pipe; 10. Return combustion chamber; 11. Flow splitting cover; 12. Second smoke tube; 13. Fins; 14. Water inlet pipe; 15. Drain pipe. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 , 2 As shown in Figures 3 and 4, the present invention provides a technical solution: a spray falling film type gas steam generator, comprising: a furnace body cylinder 2 with a steam outlet at the top; there are two smoke boxes welded to both ends of the furnace body cylinder 2, and the two smoke boxes are connected by a first smoke tube 6. The smoke boxes include a front smoke box 3 welded to one end of the furnace body cylinder 2; a furnace drum 5 is welded inside the furnace body cylinder 2, and a return combustion chamber 10 is fixedly connected to one end of the furnace drum 5 away from the front smoke box 3. The front smoke box 3 and the return combustion chamber 10 are connected by a second smoke tube 12; a burner cover 8 is fixedly connected to the end of the furnace drum 5, and a burner 1 is installed at one end of the burner cover 8 through bolts. A natural gas pipeline is installed at the bottom of one end of the burner 1, and a flow splitting cover 11 is fixedly connected to the output end of the burner 1 to strengthen the air flow mixing, promote the fuel dispersion, ensure the full combustion of the fuel, and improve the combustion efficiency. A tail gas inlet pipe 7 is installed on the side of the burner cover 8; a spray pipe 9 is fixedly connected inside the burner 1 and is located above the first smoke tube 6 and the second smoke tube 12, and is used for atomizing softened water to absorb heat quickly to generate water vapor.

[0025] It should be noted that in the present invention, natural gas passes through the internal fan of the burner Z-31002 and the combustion-supporting fan, and then is ignited under a certain ratio. After full combustion; the flow splitting cover 11 inside the burner cover 8, from the furnace drum 5 to the return combustion chamber 10, and then enters the front smoke box 3 through the return combustion chamber 10 and the second smoke tube 12, and then enters the rear smoke box 4 through the front smoke box 3 and the first smoke tube 6. During this period, the spray pipe 9 sprays the first smoke tube 6 and the second smoke tube 12, and the atomized softened water is sprayed onto the outer surfaces of the first smoke tube 6, the second smoke tube 12 and the furnace drum 5. The atomized softened water absorbs heat quickly to generate water vapor; the air and natural gas after full combustion release heat and become flue gas, which is discharged from the top discharge port of the rear smoke box 4 to the high altitude.

[0026] Please refer to Figures 2 and 3. The front smoke box 3 is located above the burner cover 8. The smoke box also includes a rear smoke box 4, which is fixedly connected to one end of the furnace body cylinder 2 away from the front smoke box 3. The first smoke pipe 6 is fixedly connected between the front smoke box 3 and the rear smoke box 4.

[0027] It should be noted that a discharge port is fixedly connected to the top of the rear smoke box 4 of the present utility model. The burned smoke sequentially passes through the furnace liner 5, the recirculation chamber 10, the second smoke pipe 12, the front smoke box 3, the first smoke pipe 6, and the rear smoke box 4. The smoke travels in an S-shaped path inside the furnace body cylinder 2, enabling the heat to come into full contact with the water mist and improving the utilization rate of heat.

[0028] Please refer to Figure 3 shown. The rear smoke box 4 is of an arc-shaped structure. The first smoke pipes 6 are located at both ends of the rear smoke box 4. The first smoke pipes 6 and the second smoke pipes 12 are arranged vertically staggered. Bent tube expansion joints are provided in the middle of the first smoke pipes 6 and the middle of the second smoke pipes 12. A water inlet pipe 14 is installed at the top of the furnace body cylinder 2, and the bottom of the water inlet pipe 14 is connected to the spray pipe 9.

[0029] It should be noted that the first smoke pipes 6 and the second smoke pipes 12 of the present utility model are arranged vertically staggered to prevent mutual occlusion and limited spray area, which may affect the heat exchange efficiency. Since there is a large temperature difference between the softened water and the fully burned natural gas, the thermal expansion differences of the first smoke pipes 6, the second smoke pipes 12, the furnace liner 5, and the furnace body cylinder 2 are inconsistent. To avoid strength failure, instability failure, and tube pulling-off failure, the first smoke pipes 6 and the second smoke pipes 12 are bent tube expansion joints. Since the furnace liner 5 is close to the cylinder and has limited space, a bellows expansion joint is provided in the middle of the furnace liner 5 to reduce their axial loads and the temperature difference stress of the tubes, tube sheets, furnace, and shell.

[0030] Please refer to Figure 2 、 3 shown. Fins 13 are installed at one end of both the recirculation chamber 10 and the burner 1. An exhaust pipe 15 is installed at one end of the burner 1 and below the rear smoke box 4.

[0031] It should be noted that the fins of the present utility model can transfer more heat to the working medium, facilitating heat exchange. The exhaust pipe is used to discharge the waste gas generated during the ignition process or empty the residual gas in the pipeline when the system shuts down.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0033] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0034] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. Spray falling film gas steam generator, characterized in that: include: A furnace body cylinder (2) with a steam outlet at the top; Smoke boxes, two of which are provided and are placed at both ends of the furnace body cylinder (2), the two smoke boxes being connected via a No. 1 smoke pipe (6), and the smoke boxes comprising a front smoke box (3) fixedly connected to one end of the furnace body cylinder (2); A furnace core (5), the furnace core (5) being placed inside the furnace body cylinder (2), one end of the furnace core (5) being fixedly connected to a reburning chamber (10), and the front smoke box (3) and the reburning chamber (10) being connected via a No. 2 smoke pipe (12); A burner cover (8), the burner cover (8) is placed at the end of the furnace (5), a burner (1) is installed at one end of the burner cover (8), a flow divider cover (11) is fixedly connected to the output end of the burner (1), and an exhaust gas inlet pipe (7) is installed on the side of the burner cover (8); A spray pipe (9) is placed inside the burner (1) and is used to atomize softened water to absorb heat and quickly generate water vapor.

2. The spray falling film gas steam generator according to claim 1, characterized in that: The front smoke box (3) is located above the burner cover (8), and the smoke box also includes a rear smoke box (4). The rear smoke box (4) is fixedly connected to an end of the furnace body (2) away from the front smoke box (3), and the No. 1 smoke pipe (6) is fixedly connected between the front smoke box (3) and the rear smoke box (4).

3. The spray falling film gas steam generator according to claim 2, characterized in that: The rear smoke box (4) is an arc-shaped structure, the No. 1 smoke pipe (6) is located at two ends of the rear smoke box (4), and the No. 1 smoke pipe (6) and the No. 2 smoke pipe (12) are arranged alternately up and down.

4. The spray falling film gas steam generator according to claim 3 is characterized in that: A bent pipe expansion joint is provided at the middle of the No. 1 smoke pipe (6) and the middle of the No. 2 smoke pipe (12).

5. The spray falling film gas steam generator according to claim 1, characterized in that: A water inlet pipe (14) is installed on the top of the furnace body cylinder (2), and the bottom of the water inlet pipe (14) is connected to the spray pipe (9).

6. The spray falling film gas steam generator according to claim 1, characterized in that: The re-ignition chamber (10) and one end of the burner (1) are both provided with fins (13).

7. The spray falling film gas steam generator according to claim 1, characterized in that: An exhaust pipe (15) is installed at one end of the burner (1) and below the rear smoke box (4).

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