CN219607040U - Gas steam generator - Google Patents

Abstract

The utility model provides a gas steam generator, which is characterized in that an upper boiler barrel, a heat exchange tube group and a lower header box are sequentially arranged in a main machine body from top to bottom, the heat exchange tube group is formed by oppositely arranging a first evaporation tube group and a second evaporation tube group which are identical in structure, the first evaporation tube group or the second evaporation tube group is formed by arranging a plurality of evaporation tube units which are identical in structure in parallel, each evaporation tube unit is formed by connecting a plurality of sections of fin tubes, and two adjacent sections of fin tubes are communicated through U-shaped tubes; an inner sleeve is sleeved in the upper boiler barrel, a steam-water space is formed between the inner wall of the upper boiler barrel and the outer wall of the inner sleeve, a water supply pipe seat is connected with the cavity, and on one hand, the steam-water space is communicated with a lower header through a vertically arranged down pipe and a heat exchange pipe group; on the other hand, the steam-water space is communicated with the gas-collecting pot. The utility model solves the problem that the water volume of the existing gas steam generator is difficult to be controlled below 30L under the condition of having heat exchange efficiency and evaporation capacity.

Description

Gas steam generator

Technical Field

The utility model relates to a gas steam generator, and belongs to the technical field of small boilers.

Background

Steam generators are mechanical devices that utilize the thermal energy of fuel or other energy sources to heat water into hot water or steam, playing an important role in both production and life. With the rapid development of small and medium-sized enterprises, the demand of society for steam generators is increasing.

The traditional gas steam equipment has no requirement on water volume, and the boiler normal water level water volume is larger than 30L, which belongs to pressure equipment, and is not in a monitoring range when the normal water level water volume of the boiler is smaller than 30L in the processes of design, manufacture, installation and use.

At present, technicians in the industry begin to try to design and produce a gas steam generator with the normal water level and the water volume of the boiler being less than 30L, however, the heat exchange efficiency and the evaporation capacity are difficult to be combined when the normal water level and the water volume of the boiler are less than 30L, so that the development of the gas steam generator with the normal water level and the water volume of the boiler being less than 30L encounters a bottleneck.

Disclosure of Invention

In order to solve the problems in the background art, the utility model provides a gas steam generator, which solves the problem that the water volume is difficult to be controlled below 30L under the condition that the existing gas steam generator product has heat exchange efficiency and evaporation capacity.

The utility model is implemented by the following technical scheme:

the gas steam generator comprises a main machine body, a burner, a steam outlet and a smoke outlet, wherein the burner, the steam outlet and the smoke outlet are connected with the main machine body; the heat exchange tube group is formed by arranging a plurality of evaporation tube units with the same structure in parallel, each evaporation tube unit is formed by connecting a plurality of sections of fin tubes, and two adjacent sections of fin tubes are communicated through a U-shaped tube; an inner sleeve is sleeved in the upper boiler barrel, the upper boiler barrel is coaxial with the inner sleeve, a steam-water space is formed between the inner wall of the upper boiler barrel and the outer wall of the inner sleeve, a water supply pipe seat is connected with the cavity, on one hand, the steam-water space is communicated with a lower header through a vertically arranged down pipe and a heat exchange pipe group, and on the other hand, the steam-water space is communicated with a gas collecting boiler barrel.

Preferably, the whole evaporating pipe unit formed by connecting the multi-section finned pipes is in an S shape and is divided into a heat exchange upper section and a heat exchange lower section, the heat exchange front sections of the evaporating pipe units are arranged in parallel to form a compact convection heat exchange area which can exchange heat with flue gas fully, the heat exchange lower sections of the evaporating pipe units are arranged in parallel to form a cavity, the cavity is a radiation heat exchange area, and the inner part of the cavity of the radiation heat exchange area is used as a hearth and corresponds to the position of a combustion head of the burner. The design of cavity has reserved the space for the burning of combustor combustion head, guarantees the heat and the evaporating pipe unit abundant heat transfer that burn produced under the circumstances that avoid evaporating pipe unit to be directly cauterized, effectively reduces evaporating pipe unit's loss.

Preferably, a steam collecting drum is arranged above the upper drum, and is communicated with the steam-water space, and a main steam outlet is led out of the steam collecting drum. The design of the steam collecting boiler barrel can effectively prevent the generated steam from being mixed with water to be carried out, thereby ensuring the quality of the steam.

Preferably, two transverse smoke folding walls are arranged in the main machine body and positioned in the heat exchange area above the hearth, and the two smoke folding walls are arranged in a staggered manner to enable the smoke flowing through the smoke folding walls to form an S-shaped curve, namely, the heat exchange efficiency is improved by prolonging the return stroke of the smoke.

Preferably, the host body shell is provided with refractory bricks and a heat preservation layer from inside to outside in sequence, so that heat dissipation in the host body is effectively prevented.

Preferably, an economizer is installed at the smoke outlet of the main body. The energy-saving device is used for preheating medium water to be injected into the upper boiler barrel by utilizing the waste heat of the flue gas, so that energy conservation and emission reduction are realized. The bottom port of the energy-saving device adopts a large-pipe-diameter heat exchange pipe, and deposited scale and sediment can be collected so as to be cleaned at fixed time.

Preferably, the outside of host computer body still is equipped with manometer, thermometer, main steam valve and the relief valve of being connected with the steam-collecting boiler section of thick bamboo, conveniently knows the running condition of host computer main part in real time to accessible operation valve guarantees steam safety output.

Preferably, a water level gauge is further arranged on the outer side of the main body, and the water level gauge is used for measuring the water level of medium water in the steam-water space.

Preferably, the two end sides of the lower header are respectively connected by a blind plate, and the lower header is detachable, so that scale and sediment can be conveniently cleaned during furnace shutdown.

Preferably, a superheater is arranged between the smoke outlet of the main machine body and the energy saver, and the use of the superheater can improve the steam temperature and the steam evaporation capacity.

The utility model has the beneficial effects that: according to the utility model, on one hand, the heat exchange area is greatly increased in unit length by adopting the evaporating pipe unit formed by welding the fin pipes and the U-shaped pipes, and the heat exchange efficiency is improved, and on the other hand, the water volume can be effectively reduced by additionally arranging the inner sleeve in the upper boiler barrel, so that the water capacity of the gas steam generator can be effectively controlled below 30L under the condition of having both the heat exchange efficiency and the evaporation capacity.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a side view of the present utility model.

Fig. 3 is a top view of the present utility model.

Fig. 4 is a schematic view of the internal structure (heat exchanging portion) of the present utility model.

Fig. 5 is a side view of fig. 4.

Fig. 6 is a top view of fig. 4.

Fig. 7 is a schematic view of the structure of a single evaporator tube unit of the present utility model.

Fig. 8 is a schematic view (front view) of the structure of the superheater adding device of the present utility model.

Fig. 9 is a schematic view (top view) of the structure of the added superheater of the present utility model.

In the figure: 1-host machine body, 2-upper boiler barrel, 3-lower header, 4-steam collecting boiler barrel, 5-inner sleeve, 6-down tube, 7-water supply tube seat, 8-burner, 9-smoke folding wall, 10-pressure gauge, 11-thermometer, 12-main steam valve, 13-safety valve, 14-smoke outlet, 15-energy economizer, 17-hearth and 18-explosion door. 19 fluviographs, 20-refractory bricks, 21-heat insulation layers, 22-finned tubes, 23-U-shaped tubes, 24-steam-water space and 25-superheaters.

Description of the embodiments

The gas steam generator as shown in fig. 1 to 7 comprises a main machine body 1, a burner 8, a steam outlet and a smoke outlet, wherein the burner 8, the steam outlet and the smoke outlet are connected with the main machine body 1, and an upper boiler barrel 2, a heat exchange tube group and a lower header 3 are sequentially arranged in the main machine body 1 from top to bottom. The heat exchange tube group is arranged in a heat exchange area in the main machine body 1, the upper end of the heat exchange tube group is communicated with the upper boiler barrel 2, and the lower end of the heat exchange tube group is communicated with the lower header 3.

The heat exchange tube group is formed by arranging a plurality of evaporation tube units with the same structure in parallel, each evaporation tube unit is formed by connecting a plurality of sections of fin tubes 22, and two adjacent sections of fin tubes 22 are communicated through a U-shaped tube 23. Further, the whole evaporating pipe unit formed by connecting the multi-section finned pipes 22 is in an S shape and is divided into an upper heat exchange section and a lower heat exchange section, the upper heat exchange sections of the evaporating pipe units are arranged in parallel to form a compact convection heat exchange area, the lower heat exchange sections of the evaporating pipe units are arranged in parallel to form a cavity which is a radiation heat exchange area, and the inside of the cavity of the radiation heat exchange area is used as a hearth 17 and corresponds to the position of a combustion head of the combustor 8.

An inner sleeve 5 is sleeved in the upper drum 2, the upper drum 2 is coaxial with the inner sleeve 5, a steam-water space 24 is formed between the upper drum 2 and the inner sleeve 5, a water supply pipe seat 7 is communicated with the steam-water space 24, the steam-water space 24 is communicated with the lower header 3 through a vertically arranged downcomer 6 and a heat exchange pipe group on one hand, and is communicated with a steam collecting drum 4 arranged above the upper drum 2 through a steam outlet on the other hand, and a main steam outlet is led out of the steam collecting drum 4. The soda space 24 is used for containing medium water and steam.

Further, two transverse smoke folding walls 9 are arranged in the main machine body 1 and in the convection heat exchange area above the hearth 17, and the two smoke folding walls 9 are arranged in a staggered mode to enable smoke flowing through to form an S-shaped curve. The host machine body 1 is provided with a refractory brick 20 and a heat preservation layer 21 from inside to outside.

Further, an economizer 15 is installed at the smoke outlet of the main machine body 1, the smoke inlet of the economizer 15 is connected with the smoke outlet of the main machine body 1, and the water outlet of the economizer 15 is communicated with the steam-water space 24 through a water supply pipe seat 7.

Further, a pressure gauge 10, a thermometer 11, a main steam valve 12, a safety valve 13 and a water level gauge 19 connected with the steam collecting boiler tube 4 are also arranged on the outer side of the main machine body 1.

Further, the two end sides of the lower header 3 are respectively connected by blind plates.

Further, as shown in fig. 8 and 9, a superheater 25 is installed between the economizer 15 and the smoke outlet of the main unit body 1.

The working principle of the utility model is as follows: the fuel gas enters the main machine body 1 through the burner 8, the fuel gas is fully combusted in the hearth, the fuel gas generated by combustion rises to exchange heat with the heat exchange tube group, the fuel gas finally enters the energy saver 15 through the smoke outlet of the main machine body 1, the energy saver 15 utilizes the waste heat of the fuel gas to preheat the medium water to be injected into the steam-water space 24, and the medium water entering the steam-water space 24 flows into the lower header 3 through the downcomer 6; the medium water in the lower header 3 is subjected to heat exchange evaporation in the first evaporation tube group and the second evaporation tube group, steam enters the steam-water space 24 and then enters the steam-collecting boiler barrel 4 to separate the steam from water, and the separated steam is finally discharged through the main steam valve 12; when the design superheater 25 is added between the smoke outlet of the main body 1 and the economizer 15, the separated steam enters the superheater 25 and is finally discharged through the exhaust valve on the superheater 25.

Claims (10)

1. The utility model provides a gas steam generator, includes host computer body (1) and combustor (8), steam outlet, the exhaust port of being connected with host computer body (1), its characterized in that: an upper boiler barrel (2), a heat exchange tube group and a lower header (3) are sequentially arranged in the main machine body (1) from top to bottom, the heat exchange tube group is arranged in a heat exchange area in the main machine body (1), the upper end of the heat exchange tube group is communicated with the upper boiler barrel (2), the lower end of the heat exchange tube group is communicated with the lower header (3), and a steam outlet is led out from the upper boiler barrel (2); the heat exchange tube group is formed by arranging a first evaporation tube group and a second evaporation tube group which are identical in structure in parallel, each evaporation tube unit is formed by connecting a plurality of sections of fin tubes (22), and two adjacent sections of fin tubes (22) are communicated through a U-shaped tube (23); an inner sleeve (5) is sleeved in the upper boiler barrel (2), the upper boiler barrel (2) is coaxial with the inner sleeve (5), a steam-water space (24) is formed between the inner wall of the upper boiler barrel (2) and the outer wall of the inner sleeve (5), a water supply tube seat (7) is communicated with the steam-water space (24), and the steam-water space (24) is communicated with the lower header (3) through a vertically arranged down pipe (6) and a heat exchange tube group.

2. A gas steam generator as claimed in claim 1, wherein: the evaporation tube unit formed by connecting the multi-section finned tubes (22) is integrally S-shaped and is divided into a heat exchange upper section and a heat exchange lower section, the heat exchange upper sections of the evaporation tube units are arranged in parallel to form a compact convection heat exchange area, the heat exchange lower sections of the evaporation tube units are arranged in parallel to form a cavity body which is a radiation heat exchange area, and the inner part of the cavity body of the radiation heat exchange area is used as a hearth (17) and corresponds to the position of a combustion head of the combustor (8).

3. A gas steam generator as claimed in claim 1, wherein: a steam collecting boiler barrel (4) is arranged above the upper boiler barrel (2), the steam collecting boiler barrel (4) is communicated with the steam-water space (24), and a main steam outlet is led out of the steam collecting boiler barrel (4).

4. A gas steam generator as claimed in claim 2, wherein: two transversely arranged smoke folding walls (9) are arranged in the heat exchange area which is arranged above the hearth (17) in the main machine body (1), and the two smoke folding walls (9) are arranged in a staggered mode to enable smoke flowing through to form an S-shaped curve.

5. A gas steam generator as claimed in claim 1, wherein: the host machine body (1) shell is sequentially provided with refractory bricks (20) and an insulating layer (21) from inside to outside.

6. A gas steam generator as claimed in claim 1, wherein: an economizer (15) is arranged at the smoke outlet of the main machine body (1).

7. A gas steam generator as claimed in claim 3, wherein: the outside of the main machine body (1) is also provided with a pressure gauge (10), a thermometer (11), a main steam valve (12) and a safety valve (13) which are connected with the steam collecting drum (4).

8. A gas steam generator as claimed in claim 3, wherein: and a water level gauge (19) is further arranged on the outer side of the main body (1).

9. A gas steam generator as claimed in claim 1, wherein: and two end sides of the lower header (3) are respectively connected by blind plates.

10. A gas steam generator as defined in claim 6, wherein: a superheater (25) is arranged between the smoke outlet of the main machine body (1) and the energy economizer (15).