Full-premixing steam boiler

Abstract

The utility model discloses a full premixing steam boiler which comprises a boiler body, a venturi device and an air blower which are sequentially connected with the boiler body are arranged on one side of the boiler body, and an energy saver and a chimney which are connected with the boiler body are sequentially arranged at the other end, away from the venturi device and the air blower, of the boiler body. A smoke inlet is formed in the joint of the boiler body and the Venturi device, a combustion finned tube and a convection bank are arranged in an inner cavity of the boiler body, and a smoke outlet formed in one side of the boiler body is formed in one side of the convection bank. The utility model has the beneficial effects that the mixed gas is further uniformly mixed in the flue gas inlet and then is ignited after passing through the combustion finned tube, and the steam-water mixture circulating in the finned tube can cool the combustion flame, so that the generation of thermal NOx is reduced, the combustion is ultra-low in nitrogen, the flue gas generated by combustion passes through the convection bank from the hearth, and the combustion efficiency is improved. The boiler flue gas temperature reduction device is simple in structure and more sufficient in combustion.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam boiler technical field, concretely is a kind of full premix steam boiler. BACKGROUND

[0002] Water-cooled premix technology is more and more mature, and water-cooled premix steam boilers have gradually entered the market, but the water-cooled premix steam boilers on the market currently have the following problems: 1. The overall structure is limited, and the maximum can only be 20 tons, which cannot meet the requirements of some users who need large boilers. 2. The overall structure is complex, occupies a large area, and has high cost. 3. The production process has a large amount of NOx emissions, which will pollute the environment if directly discharged, and will increase the use cost after treatment. SUMMARY

[0003] The utility model aims at providing a full premix steam boiler to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a full premix steam boiler, comprising a boiler body, a Venturi device and a blower connected in sequence on one side of the boiler body, an energy saver and a chimney connected in sequence on the other end of the boiler body away from the Venturi device and the blower, a flue gas inlet provided at the connection between the boiler body and the Venturi device, a combustion finned tube and a convection tube bundle provided in the inner cavity of the boiler body, and a flue gas outlet provided on one side of the boiler body.

[0005] Further optimization is that upper and lower heads are respectively provided on the upper and lower ends of the boiler body.

[0006] Further optimization is that the boiler body is composed of an upper cylinder and a lower cylinder, and the combustion finned tube and the convection tube bundle are arranged in the middle part thereof, and a support is provided at the bottom of the lower cylinder.

[0007] Further optimization is that a steam-water separation device is provided on the upper end of the upper cylinder.

[0008] Further optimization is that first, second, third, fourth, fifth, sixth and seventh tube seats are respectively provided at the top end of the upper cylinder.

[0009] Further optimization is that a pressure gauge and a pressure control device are provided on the first tube seat, an extremely low liquid controller is provided on the second tube seat, and safety valves are provided on the sixth and seventh tube seats.

[0010] Further optimization is that the steam-water separation device is connected with a main steam pipe provided on the end face of the upper cylinder.

[0011] Further optimization, the upper cylinder side is respectively provided with water supply pipe seat and water outlet pipe seat, the upper cylinder is away from the water supply pipe seat and the surface blowdown pipe seat the other side is respectively provided with the eighth pipe seat and the ninth pipe seat, is respectively provided with ground liquid level meter and remote liquid level control device on it.

[0012] Further optimization, the economizer top is provided with economizer smoke inlet, it is connected with the flue gas outlet, the lower end of the economizer smoke inlet is provided with economizer finned tube, the lower end of the economizer finned tube is provided with the economizer smoke outlet connected with the chimney.

[0013] Further optimization, the economizer one side upper and lower ends are respectively provided with economizer water inlet pipe seat and tenth pipe seat.

[0014] Beneficial effects

[0015] The full premixing steam boiler provided by the utility model, the mixed gas is further mixed uniformly in the flue gas inlet, then is ignited after passing through the combustion finned tube, the steam-water mixture circulating in the finned tube can cool the combustion flame, thereby reducing the generation of thermal NOx, making the combustion ultra-low nitrogen, the flue gas generated by combustion passes through the convection tube bundle from the furnace chamber, is discharged from the flue gas outlet of the boiler body after further reducing the flue gas temperature, the emission of NOx in the production process is reduced as a whole, and the structure is simple, and the combustion is more sufficient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the utility model;

[0017] Figure 2 It is the boiler body structure schematic view of the utility model;

[0018] Figure 3 It is the boiler body overhead structure schematic view of the utility model;

[0019] Figure 4 It is the overall structure schematic view of the economizer of the utility model. DETAILED DESCRIPTION

[0020] The following is the specific embodiment of the utility model and is combined with the drawings, and the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0021] EMBODIMENT

[0022] As Figures 1-4As shown, a full premixing steam boiler comprises a boiler body 3, a Venturi device 2 and a blower 1 connected to the boiler body 3 in sequence, an economizer 4 and a chimney 5 connected to the boiler body 3 in sequence at the other end of the boiler body 3 away from the Venturi device 2 and the blower 1, a flue gas inlet 9 arranged at the connection between the boiler body 3 and the Venturi device 2, and a combustion finned tube 10 and a convection tube bundle 12 arranged in the inner cavity of the boiler body 3, wherein the convection tube bundle 12 is arranged at one side of the boiler body 3 and provided with a flue gas outlet 14.

[0023] In the embodiment, the upper end and the lower end of the boiler body 3 are respectively provided with an upper head 27 and a lower head 7, and the upper head and the lower head are provided with manholes for facilitating manual maintenance of the cylinder.

[0024] The boiler body 3 is composed of an upper cylinder 11 and a lower cylinder 8, and the combustion finned tube 10 and the convection tube bundle 12 are arranged in the middle part of the boiler body 3, and the lower cylinder 8 is provided with a support 6 at the bottom, and the steam-water mixture flowing through the finned tube can cool the combustion flame, thereby reducing the generation of thermal NOx and achieving ultra-low nitrogen combustion.

[0025] The upper end of the upper cylinder 11 is provided with a steam-water separation device 13, and the steam-water separation device 13 ensures that the humidity of the steam meets the standard, and the separated steam is transported to the user from the main steam pipe.

[0026] The top end of the upper cylinder 11 is respectively provided with a first pipe seat 16, a second pipe seat 17, a third pipe seat 18, a fourth pipe seat 19, a fifth pipe seat 20, a sixth pipe seat 21 and a seventh pipe seat 29.

[0027] The first pipe seat 16 is provided with a pressure gauge and a pressure control device, the second pipe seat 17 is provided with an extremely low liquid level controller, and the sixth pipe seat 21 and the seventh pipe seat 29 are both provided with safety valves, which are respectively used for controlling the liquid level of the boiler, adjusting the load of the boiler, ensuring the safe operation of the boiler and preventing the overpressure operation of the boiler.

[0028] The steam-water separation device 13 is connected with the main steam pipe 20 arranged on the end face of the upper cylinder 11, and the separated steam is transported to the user from the main steam pipe.

[0029] The side of the upper cylinder 11 is also respectively provided with a water supply pipe seat 19 and a water outlet pipe seat 18, and the other side of the upper cylinder 11 away from the water supply pipe seat 19 and the surface blowdown pipe seat 18 is respectively provided with an eighth pipe seat 15 and a ninth pipe seat 28, and the eighth pipe seat 15 and the ninth pipe seat 28 are respectively provided with a ground liquid level meter and a remote liquid level control device.

[0030] The top of the economizer 4 is provided with an economizer smoke inlet 22 connected with the flue gas outlet 14, the lower end of the economizer smoke inlet 22 is provided with an economizer finned tube 23, the lower end of the economizer finned tube 23 is provided with an economizer smoke outlet 24 connected with the chimney 5, the flue gas and the economizer finned tube exchange heat, and the flue gas is discharged into the chimney from the economizer smoke outlet.

[0031] The economizer 4 is provided with an economizer water inlet pipe seat 26 and a tenth pipe seat 25 at the upper and lower ends respectively. The normal temperature feed water enters the economizer water inlet pipe seat 26, enters the finned tube and exchanges heat with the flue gas in a countercurrent manner, and the feed water is heated and then discharged from the pipe seat 25 to enter the boiler body feed water pipe seat 19.

[0032] The overall structure and working process are as follows:

[0033] The air discharged from the air blower enters the Venturi device and mixes with the natural gas. The mixed gas discharged from the Venturi device enters the boiler body and is ignited to burn in the furnace. The flue gas generated by the burning heats the boiler water to generate steam. The flue gas after heat exchange and temperature reduction is discharged from the boiler body to the economizer to heat the boiler feed water. The flue gas discharged from the economizer is discharged into the atmosphere through the chimney.

[0034] The mixed gas is further mixed and uniform in the flue gas inlet, and then is ignited after passing through the combustion finned tube. The steam-water mixture flowing through the finned tube can cool the combustion flame, thereby reducing the generation of thermal NOx, achieving ultra-low nitrogen combustion, and the flue gas generated by the combustion passes through the convection tube bundle to further reduce the flue gas temperature and is discharged from the flue gas outlet of the boiler body.

[0035] The entire boiler body is supported by the support; the boiler feed water enters the upper cylinder through the feed water pipe seat, and the feed water is naturally circulated between the upper cylinder, the finned tube, the convection tube bundle, and the lower cylinder to generate steam. The generated steam is separated from the water through the steam-water separation device to ensure that the humidity of the steam meets the standard. The separated steam is transported to the user through the main steam pipe.

[0036] The manholes are arranged in the upper and lower heads for maintenance; the eighth pipe seat and the ninth pipe seat are respectively provided with a liquid level meter and a remote liquid level control device for controlling the liquid level of the boiler; the first pipe seat is provided with a pressure gauge and a pressure control device for adjusting the load of the boiler; the second pipe seat is provided with an extremely low liquid level control for ensuring the safe operation of the boiler. The safety valves are arranged on the sixth pipe seat and the seventh pipe seat respectively to prevent overpressure during the operation of the boiler.

[0037] The flue gas discharged from the boiler body enters the economizer flue gas inlet, and then the flue gas exchanges heat with the finned tube of the economizer. The flue gas is discharged from the economizer flue gas outlet and discharged into the chimney.

[0038] The normal temperature feed water enters the economizer water inlet pipe seat, enters the finned tube, and exchanges heat with the flue gas in a countercurrent manner. The feed water is heated and then discharged from the tenth pipe seat to enter the boiler body feed water pipe seat.

[0039] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of the present application.

Claims

1. A fully premixing steam boiler, characterized by: The utility model provides a boiler, including boiler body (3), one side of boiler body (3) is equipped with with it connection venturi device (2) and air blower (1) in proper order, the other end of boiler body (3) is away from venturi device (2) and air blower (1) and is equipped with with it connection economizer (4) and chimney (5) in proper order, the connection place of boiler body (3) with venturi device (2) is equipped with flue gas inlet (9), the inner chamber of boiler body (3) is equipped with combustion finned tube (10) and convection tube bundle (12), one side of convection tube bundle (12) is equipped with flue gas outlet (14) arranged in one side of boiler body (3).

2. The all-premix fired steam boiler of claim 1, wherein: The upper end and the lower end of the boiler body (3) are respectively provided with an upper head (27) and a lower head (7).

3. The all-premix fired steam boiler of claim 1, wherein: The boiler body (3) is composed of an upper cylinder (11) and a lower cylinder (8), and the combustion finned tube (10) and the convection tube bundle (12) are arranged in the middle part thereof, and the lower cylinder (8) is provided with a support (6) at the bottom.

4. The all-premix fired steam boiler of claim 3, wherein: The upper end of the upper cylinder (11) is provided with a steam-water separation device (13).

5. The all-premix fired steam boiler of claim 3, wherein: The top end of the upper cylinder (11) is respectively provided with a first pipe seat (16), a second pipe seat (17), a third pipe seat (18), a fourth pipe seat (19), a fifth pipe seat (20), a sixth pipe seat (21), and a seventh pipe seat (29).

6. The all-premix fired steam boiler of claim 5, wherein: The first pipe seat (16) is provided with a pressure gauge and a pressure control device, the second pipe seat (17) is provided with an extremely low liquid level controller, and the sixth pipe seat (21) and the seventh pipe seat (29) are both provided with safety valves.

7. The all-premix fired steam boiler of claim 4, wherein: The steam-water separation device (13) is connected with the fifth pipe seat (20) arranged on the end face of the upper cylinder (11).

8. The all-premix fired steam boiler of claim 3, wherein: One side of the upper cylinder (11) is also respectively provided with a fourth pipe seat (19) and a third pipe seat (18), and the other side of the upper cylinder (11) away from the fourth pipe seat (19) and the third pipe seat (18) is respectively provided with an eighth pipe seat (15) and a ninth pipe seat (28), on which a ground liquid level meter and a remote liquid level control device are respectively arranged.

9. The all-premix fired steam boiler of claim 1, wherein: The top of the economizer (4) is provided with an economizer smoke inlet (22) connected with the flue gas outlet (14), the lower end of the economizer smoke inlet (22) is provided with an economizer finned tube (23), and the lower end of the economizer finned tube (23) is provided with an economizer smoke outlet (24) connected with the chimney (5).

10. The all-premix fired steam boiler of claim 1, wherein: The economizer (4) is provided with an economizer water inlet pipe seat (26) and a tenth pipe seat (25) at the upper and lower ends of one side.

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