Gas steam generator

Abstract

The utility model provides a fuel gas steam generator which comprises a main machine body, a steam outlet and a smoke outlet, the steam outlet and the smoke outlet are formed in the main machine body, a burner, a heat exchange area and an energy saver are sequentially arranged in the main machine body, a first heat exchange assembly is arranged in the heat exchange area, and a second heat exchange assembly is arranged in the heat exchange area. The first heat exchange assembly adopts an upper boiler barrel and a lower boiler barrel which are arranged up and down, on one hand, the upper boiler barrel and the lower boiler barrel are communicated through a plurality of finned tubes which are arranged in parallel and are vertically arranged, and on the other hand, the upper boiler barrel and the lower boiler barrel are communicated through a downcomer; an inlet end of a water path of the energy saver is communicated with an external water source, and an outlet end of the water path of the energy saver is communicated with the lower boiler barrel through a water path pipeline and an inclined pipe; a smoke outlet of the heat exchange area is in butt joint with a smoke inlet of the energy saver, the smoke outlet is led out of the energy saver, and the steam outlet is led out of the upper boiler barrel. The fuel gas steam generator provided by the utility model has the advantages of simple structure and low manufacturing cost under the conditions of heat exchange efficiency and evaporation capacity.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas steam generator belongs to small -size boiler technical field. BACKGROUND

[0002] Steam generator is the mechanical equipment that uses the heat energy of fuel or other energy to heat water to hot water or steam, and plays a very important role in production and life. With the rapid development of small and medium-sized enterprises, gas steam generator is very popular in the market, and the demand is increasing.

[0003] At present, the gas steam generator developed by the technical personnel in the industry usually adopts a relatively complex structure design in order to ensure the heat exchange efficiency and the evaporation capacity. The complex structure design not only increases the manufacturing and use cost, but also increases the maintenance and maintenance cost, so it is difficult to meet the needs of users. UTILITY MODEL CONTENT

[0004] The utility model discloses a gas steam generator, realizes simple structure, low cost under the condition of having heat exchange efficiency and evaporation capacity.

[0005] The utility model is implemented through the following technical solutions:

[0006] A gas steam generator, including host computer body and being equipped with steam export, smoke outlet on host computer body, the internal space of host computer body is as heat exchange area, according to the overall trend of flue gas, heat exchange area is divided into first end and tail end, installs combustor in the first end of heat exchange area, leads out smoke outlet in the tail end of heat exchange area, and the smoke outlet is communicated with the smoke outlet.

[0007] Preferably, the plurality of parallel arrangement and vertical arrangement finned tubes are arranged in rows along the flue gas flow direction, and the upper end thereof is connected to the upper drum through different angle elbow pipes, and the lower end thereof is connected to the lower drum through different angle elbow pipes.

[0008] Preferably, the heat exchange region is also provided with a second heat exchange assembly, which is arranged between the burner and the first heat exchange assembly; the second heat exchange assembly is oppositely arranged by a first evaporation pipe group and a second evaporation pipe group which are of the same structure, the first evaporation pipe group or the second evaporation pipe group is composed of a plurality of evaporation pipe units which are arranged in parallel and are of the same structure, each evaporation pipe unit is composed of a plurality of finned pipes which are connected, and the adjacent two finned pipes are communicated by a U-shaped pipe; the upper ends of all the evaporation pipe units are connected to an upper header tank which is communicated with the upper drum, and the lower ends of all the evaporation pipe units are connected to a lower header tank which is communicated with the lower drum, and a feed water pipe is led out from the lower header tank and communicated with an external water tank.

[0009] Preferably, a smoke baffle is vertically arranged below the upper drum, and the lower edge of the smoke baffle is lower than the height of the smoke outlet.

[0010] Preferably, a smoke baffle is vertically arranged below the upper drum, and the lower edge of the smoke baffle is lower than the height of the smoke outlet.

[0011] Preferably, the main body shell is sequentially provided with a refractory brick and a heat preservation layer from inside to outside.

[0012] Preferably, the tail end of the heat exchange region is connected with the economizer through the smoke outlet.

[0013] Preferably, the economizer adopts one economizer unit or is composed of at least two economizer units in cascade.

[0014] Preferably, the main body is further provided with a pressure gauge, a temperature gauge, a main steam valve, a water level gauge, a blowdown valve, a safety valve and other valve instruments which are connected with the main body.

[0015] Preferably, a reflux pipe is led out from the steam outlet, and the other end of the reflux pipe is connected to the upper drum.

[0016] The utility model discloses a main body, a first heat exchange assembly, a second heat exchange assembly, a smoke baffle, a main body shell, a steam outlet, an economizer and a reflux pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1 (two energy-saving units cascaded).

[0018] Figure 2 for Figure 1 A schematic diagram of the connection between the first heat exchange component and the first energy-saving unit.

[0019] Figure 3 for Figure 2 Top view.

[0020] Figure 4 This is a flue gas flow diagram of Example 1.

[0021] Figure 5 The soda process of Example 1 Figure 1 .

[0022] Figure 6 The soda process of Example 1 Figure 2 .

[0023] Figure 7 This is a schematic diagram of the overall structure of Example 2.

[0024] Figure 8 Partial side view of Example 2 Figure 1 (Including the second heat exchange component).

[0025] Figure 9 Partial side view of Example 2 Figure 2 (Including the first heat exchange component).

[0026] Figure 10 This is a top view of Example 2.

[0027] Figure 11 This is a schematic diagram of the connection structure between the first heat exchange component and the second heat exchange component in Embodiment 2.

[0028] Figure 12 This is a schematic diagram of the structure of the second heat exchange component in Embodiment 2.

[0029] Figure 13 This is a top view of the connection structure between the first heat exchange component and the second heat exchange component in Embodiment 2.

[0030] In the diagram: 1. Main unit, 2. Insulation layer, 3. First heat exchange component, 4. Second heat exchange component, 5. Smoke baffle, 6. Eco-friendly device, 7. Refractory brick, 8. Burner, 9. Return pipe, 10. Steam outlet, 11. Smoke outlet, 12. Smoke baffle wall, 3-1. Upper boiler drum, 3-2. Lower boiler drum, 3-3. Finned tube, 3-4. Downcomer, 3-5. Evaporator unit, 3-6. Upper header, 3-7a. Lower header one, 3-7b. Lower header two, 3-8. Water supply pipe. Detailed Implementation

[0031] Embodiment One

[0032] As Figures 1 to 6 shown in one kind of gas steam generator, including main body 1 and the steam outlet 10, smoke outlet 11 that are equipped on main body 1, the main body 1 shell is sequentially provided with firebrick 7 and insulation layer 2 from inside to outside.

[0033] Further, the internal space of the main body 1 is used as a heat exchange area, and the heat exchange area is divided into a head end and a tail end according to the overall direction of the flue gas. A burner 8 is installed at the head end of the heat exchange area, and a smoke outlet is led out at the tail end of the heat exchange area. The smoke outlet is communicated with the smoke outlet 11 through an economizer 6.

[0034] Further, a first heat exchange assembly 3 is arranged in the heat exchange area. The first heat exchange assembly 3 comprises an upper drum 3-1 and a lower drum 3-2 arranged vertically. Between the upper drum 3-1 and the lower drum 3-2, a plurality of finned tubes 3-3 arranged in parallel and vertically are connected, and a downcomer 3-4 is also connected. The plurality of finned tubes 3-3 arranged in parallel and vertically are arranged in a row along the direction of the flue gas flow. The upper ends of the finned tubes 3-3 are connected to the upper drum 3-1 through bent pipes with different angles, and the lower ends of the finned tubes 3-3 are connected to the lower drum 3-2 through bent pipes with different angles.

[0035] Further, the economizer 6 is composed of two economizer units connected in series, which are referred to as a first economizer unit and a second economizer unit. The two economizer units are connected in series in terms of flue gas flow, that is, the smoke outlet of the heat exchange area is connected to the smoke inlet of the first economizer unit, and the second economizer unit leads out the smoke outlet 11. Further, the two economizer units are connected to an external water tank through water pipes. In particular, since the second heat exchange assembly 4 is not provided in this embodiment, a inclined pipe is connected to the lower drum 3-2 from the bottom of the first economizer unit to provide medium water after preheating.

[0036] Further, a pressure gauge, a temperature gauge, a main steam valve, a water level gauge, a blowdown valve, a safety valve and other valve instruments are arranged on the outside of the main body 1.

[0037] Further, a return pipe is led out from the steam outlet, and the other end of the return pipe is connected to the upper drum 3-1, so as to return the water carried in the steam to the heat exchange assembly.

[0038] Further, an inner sleeve is arranged in the upper drum 3-1. The inner sleeve is coaxially arranged with the upper drum 3-1. A steam-water space is formed between the inner wall of the upper drum 3-1 and the outer wall of the inner sleeve. The inner sleeve is hollow. The inner sleeve can effectively reduce the water volume.

[0039] The working process of the embodiment is as follows: the gas enters the main body 1 through the burner 8, is fully combusted in the furnace, and the flue gas generated by the combustion enters the heat exchange area, exchanges heat with the first heat exchange assembly 3, and finally enters the economizer 6 in sequence through the flue gas outlet of the heat exchange area, and is finally discharged through the flue gas outlet 11 of the economizer 6; the economizer 6 preheats the medium water from the external water tank by using the waste heat of the flue gas, the preheated medium water enters the lower drum 3-2 through the water supply pipeline, and then exchanges heat and evaporates in the inside of the vertically arranged finned tube 3-3, finally, the generated steam enters the upper drum 3-1 and is discharged through the steam outlet 10; the water supply pipeline of the embodiment is a inclined pipe connected to the lower drum 3-2 from the bottom of the first economizer unit.

[0040] In the embodiment, the flue gas path and the water path of the economizer can be connected in two ways: in the first way, the inside of the pipeline communicates with the water tank when the flue gas flows outside the pipeline; in the second way, the outside space of the pipeline communicates with the water tank when the flue gas flows inside the pipeline.

[0041] Embodiment two

[0042] As shown in Figures 7 to 10 a gas steam generator, comprising a main body 1 and a steam outlet 10 and a flue gas outlet 11 provided on the main body 1, and the main body 1 is provided with a refractory brick 7 and a heat preservation layer 2 from inside to outside.

[0043] Further, the internal space of the main body 1 serves as a heat exchange area, which is divided into a head end and a tail end according to the overall direction of the flue gas, a burner 8 is installed at the head end of the heat exchange area, and a flue gas outlet is led out at the tail end of the heat exchange area, and the flue gas outlet communicates with the flue gas outlet 11 through the economizer 6.

[0044] Further, the heat exchange area is provided with a connected first heat exchange assembly 3 and a second heat exchange assembly 4, as shown in Figures 11 to 13 the second heat exchange assembly 4 is interposed between the burner 8 and the first heat exchange assembly 3.

[0045] Specifically, the first heat exchange assembly 3 adopts an upper drum 3-1 and a lower drum 3-2 arranged vertically, and the upper drum 3-1 and the lower drum 3-2 are connected by a plurality of parallel and vertically arranged finned tubes 3-3 on one hand and by a downcomer 3-4 on the other hand, and the steam outlet 10 is led out from the upper drum 3-1. The plurality of parallel and vertically arranged finned tubes 3-3 are arranged in a row along the direction of the flue gas, the upper ends of which are connected to the upper drum 3-1 through different angle bends, and the lower ends of which are connected to the lower drum 3-2 through different angle bends.

[0046] Specifically, the second heat exchange assembly 4 is arranged opposite to the first heat exchange assembly 3 by a first evaporation pipe group and a second evaporation pipe group which are structurally identical. The first evaporation pipe group or the second evaporation pipe group is composed of a plurality of evaporation pipe units 3-5 which are arranged in parallel and are structurally identical. Each evaporation pipe unit 3-5 is composed of a plurality of sections of finned pipes which are connected and communicated by U-shaped pipes. The upper ends of all the evaporation pipe units are connected to an upper header 3-6 which is communicated with the upper drum 3-1. The lower ends of all the evaporation pipe units are connected to lower headers 3-7a and 3-7b which are communicated with the lower drum 3-2. A feed water pipe 3-8 is led out from the lower headers 3-7a and 3-7b and communicated with an external water tank.

[0047] Further, a smoke baffle 5 is vertically arranged below the upper drum 3-1 and the lower edge of the smoke baffle 5 is lower than the height of the smoke outlet. A smoke baffle wall 12 is arranged between the first heat exchange assembly 3 and the second heat exchange assembly 4. The arrangement of the smoke baffle wall 12 and the smoke baffle 5 forms an S-shaped curve of the smoke flow.

[0048] Further, a pressure gauge, a temperature gauge, a main steam valve, a water level gauge, a blowdown valve, a safety valve and other valve instruments are arranged on the outside of the main body 1 and connected thereto.

[0049] Further, a return flow pipe 9 is led out from the steam outlet and the other end of the return flow pipe is connected to the upper drum 3-1.

[0050] Further, an inner sleeve is arranged in the upper drum 3-1 and the inner sleeve is coaxially arranged with the upper drum 3-1. A steam-water space is formed between the inner wall of the upper drum 3-1 and the outer wall of the inner sleeve. The inner sleeve is hollow. The designed inner sleeve can effectively reduce the water volume.

[0051] The working process of the embodiment is as follows: the gas enters the main body 1 through the burner 8, is fully combusted in the furnace, and the flue gas generated by the combustion enters the heat exchange area, exchanges heat with the second heat exchange assembly 4 and the first heat exchange assembly 3, and finally enters the economizer 6 in sequence through the smoke outlet of the heat exchange area and is discharged through the smoke outlet 11 of the economizer 6. The economizer 6 uses the waste heat of the flue gas to preheat the medium water from the external water tank. The preheated medium water enters the lower drum 3-2 through the feed water pipe 3-8 and the lower header, exchanges heat and evaporates in the vertically arranged finned pipes, and finally the generated steam enters the upper drum 3-1 and is discharged through the steam outlet 10.

[0052] The working process of the embodiment is the same as that of the first embodiment. Only the second heat exchange assembly 4 is added on the basis of the first embodiment to improve the heat exchange efficiency. Figure 11

[0053] ​In the above two embodiments, the flue gas path and the water path of the energy saver are connected in two ways. In the first way, when the flue gas flows outside the pipeline, the inside of the pipeline is connected with the water tank. In the second way, when the flue gas flows inside the pipeline, the outside space of the pipeline is connected with the water tank.

Claims

1. A gas steam generator comprising a main body (1) and a steam outlet (10) and a smoke outlet (11) provided on the main body (1), the internal space of the main body (1) serving as a heat exchange area, characterized in that: According to the overall trend of flue gas, the heat exchange region is divided into the head end and the tail end, a burner (8) is installed at the head end of the heat exchange region, and a smoke outlet is led out at the tail end of the heat exchange region, and the smoke outlet is communicated with the smoke outlet (11); a first heat exchange assembly (3) is arranged in the heat exchange region, the first heat exchange assembly (3) adopts an upper drum (3-1) and a lower drum (3-2) arranged in an up-down mode, between the upper drum (3-1) and the lower drum (3-2), on one hand, a plurality of finned tubes (3-3) arranged in parallel and arranged vertically are communicated, and on the other hand, a downcomer (3-4) is communicated, and the steam outlet (10) is led out from the upper drum (3-1).

2. A gas-fired steam generator as claimed in claim 1, characterised in that: The plurality of finned tubes (3-3) arranged in parallel and arranged vertically are arranged in a row along the flue gas flow direction, the upper ends of the plurality of finned tubes (3-3) are connected to the upper drum (3-1) through bend pipes with different angles, and the lower ends of the plurality of finned tubes (3-3) are connected to the lower drum (3-2) through bend pipes with different angles.

3. A gas fired steam generator as claimed in claim 1 wherein: The heat exchange region is further provided with a second heat exchange assembly (4), and the second heat exchange assembly (4) is arranged between the burner (8) and the first heat exchange assembly (3); the second heat exchange assembly (4) is oppositely arranged by a first evaporation pipe group and a second evaporation pipe group which are of the same structure, the first evaporation pipe group or the second evaporation pipe group is composed of a plurality of evaporation pipe units (3-5) arranged in parallel and of the same structure, each evaporation pipe unit (3-5) is composed of a plurality of finned tubes connected, and adjacent two finned tubes are communicated through a U-shaped tube; the upper ends of all the evaporation pipe units are connected to an upper header (3-6), the upper header (3-6) is communicated with the upper drum (3-1), the lower ends of all the evaporation pipe units are connected to a lower header (3-7a, 3-7b), and the lower header (3-7a, 3-7b) is communicated with the lower drum (3-2); a feed water pipe (3-8) is led out from the lower header (3-7a, 3-7b) and communicated with an external water tank.

4. A gas-fired steam generator as claimed in claim 1, characterised in that: A smoke baffle (5) is vertically arranged below the upper drum (3-1), and the lower edge of the smoke baffle (5) is lower than the height of the smoke outlet.

5. A gas-fired steam generator as claimed in claim 1 or 4, characterised in that: A smoke baffle (12) is arranged between the first heat exchange assembly (3) and the second heat exchange assembly (4), and the arrangement of the smoke baffle (12) and the smoke baffle (5) forms an S-shaped curve of the flue gas flow direction.

6. A gas fired steam generator as claimed in claim 1, wherein: The main body (1) is provided with a refractory brick (7) and a heat preservation layer (2) from inside to outside.

7. A gas fired steam generator as claimed in claim 1 wherein: The tail end of the heat exchange region is connected with an economizer (6) through the smoke outlet.

8. A gas fired steam generator as claimed in claim 7, wherein: The economizer (6) adopts one economizer unit or at least two economizer units connected in cascade.

9. A gas fired steam generator as claimed in claim 1 wherein: A pressure gauge, a temperature gauge, a main steam valve, a water level gauge, a blowdown valve and a safety valve are further arranged on the outside of the main body (1) and connected with the main body (1).

10. A gas fired steam generator as claimed in claim 1, wherein: A return pipe is led out from the steam outlet, and the other end of the return pipe is connected to the upper drum (3-1).

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