CN212456817U - Steam and heat conducting oil mixed type circulating fluidized bed boiler - Google Patents

Abstract

Steam and conduction oil mixed circulating fluidized bed boiler, relate to the boiler technology field, it includes furnace, afterbody flue and cyclone, furnace includes dense phase district, lower part dilute phase district and upper portion dilute phase district, dense phase district and the outside cladding of lower part dilute phase district have the membrane wall pipe that is used for flowing through water, the outside cladding of upper portion dilute phase district has heat conduction oil pipe, the afterbody flue guides the flue gas from top to bottom to flow, the upper portion of afterbody flue is equipped with the convection heating pipe of connecting heat conduction oil pipe, the lower part of afterbody flue is equipped with the energy-saving appliance of connecting membrane wall pipe, the top of furnace is equipped with the steam pocket, the steam pocket is connected with inlet tube and steam output tube, inlet tube connects energy-saving appliance and membrane wall pipe, furnace is equipped with feed inlet and combustor, the combustor is connected with the air inlet pipe, the lower part of afterbody flue still is equipped with the. The utility model discloses can export steam and conduction oil simultaneously, reduce the cost burden that additionally uses boiler equipment to bring.

Description

Steam and heat conducting oil mixed type circulating fluidized bed boiler

Technical Field

The utility model relates to a boiler technical field especially indicates a steam and conduction oil mixed type circulating fluidized bed boiler.

Background

The existing boilers in the market can only output single steam, high-temperature water or organic heat carriers (heat conduction oil) with certain heat energy. However, in some large industrial parks with centralized heating, two different mediums, namely steam and heat conducting oil, are often needed for centralized heating, and generally, only two different boilers can be purchased at the same time and respectively operated to output the needed heat medium, so that the burden of enterprises is undoubtedly increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steam and conduction oil mixed type circulating fluidized bed boiler can export steam and conduction oil simultaneously, reduces the cost burden that additionally uses boiler equipment to bring.

In order to solve the technical problem, the utility model discloses a following technical scheme: a steam and heat conduction oil mixed type circulating fluidized bed boiler comprises a hearth, a tail flue and a cyclone separator for connecting the hearth with the tail flue, wherein the hearth comprises a dense phase area, a lower dilute phase area and an upper dilute phase area, smoke is guided to sequentially pass through the dense phase area, the lower dilute phase area and the upper dilute phase area from bottom to top, membrane type wall pipes for water circulation are wrapped outside the dense phase area and the lower dilute phase area, heat conduction oil pipes are wrapped outside the upper dilute phase area, the tail flue guides the smoke to flow from top to bottom, a convection heating pipe connected with the heat conduction oil pipes is arranged at the upper part of the tail flue, oil inlets are formed in the convection heating pipe, oil outlets are formed in the heat conduction oil pipes, an energy saver connected with the membrane type wall pipes is arranged at the lower part of the tail flue, a steam drum is arranged above the hearth and connected with a water inlet pipe and a steam outlet pipe, the furnace is provided with a feed inlet and a burner, the burner is connected with a primary air inlet pipe, and the lower part of the tail flue is also provided with an air preheater communicated with the primary air inlet pipe.

Preferably, the hearth is connected with a secondary air inlet pipe, and the secondary air inlet pipe is communicated with an air preheater.

More preferably, the upper end of the cyclone separator is connected with the hearth and the tail flue, and the lower end of the cyclone separator is connected with the dense-phase zone through a U-shaped return feeder.

More preferably, the economizer is a serpentine tube.

More preferably, the furnace, the back pass and the cyclone separator are all mounted on a support.

The beneficial effects of the utility model reside in that: the water and the heat conduction oil are heated by partially coating film type wall pipes and heat conduction oil pipes at different parts of the hearth, the energy saver and the convection heating pipe of the tail flue can respectively provide more sufficient heat exchange for the water and the heat conduction oil, and the effect of simultaneously outputting steam and the heat conduction oil is finally realized.

Drawings

Fig. 1 is a schematic view of the overall structure in the embodiment of the present invention.

The reference signs are:

1-hearth 1 a-dense phase zone 1 b-lower dilute phase zone

1 c-upper dilute phase zone 2-tail flue 3-cyclone separator

4-membrane wall pipe 5-heat conducting oil pipe 6-convection heated pipe

7-energy saver 8-steam drum 9-water inlet pipe

10-feed inlet 11-burner 12-primary air inlet pipe

13-air preheater 14-secondary air inlet pipe 15-U-shaped material returning device

16-support.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, the steam and heat conducting oil mixed type circulating fluidized bed boiler comprises a hearth 1, a tail flue 2 and a cyclone separator 3 connecting the hearth 1 and the tail flue 2, wherein the hearth 1 comprises a dense phase region 1a, a lower dilute phase region 1b and an upper dilute phase region 1c which guide smoke to pass from bottom to top in sequence, membrane type wall pipes 4 for flowing water are coated outside the dense phase region 1a and the lower dilute phase region 1b, a heat conducting oil pipe 5 is coated outside the upper dilute phase region 1c, the tail flue 2 guides the smoke to flow from top to bottom, a convection heating pipe 6 connected with the heat conducting oil pipe 5 is arranged at the upper part of the tail flue 2, the heating convection pipe 6 is provided with an oil inlet, the heat conducting oil pipe 5 is provided with an oil outlet, an energy saver 7 connected with the membrane type wall pipes 4 is arranged at the lower part of the tail flue 2, a steam pocket 8 is arranged above the hearth 1, and the steam, the water inlet pipe 9 is connected with the energy saver 7 and the membrane wall pipe 4, the hearth 1 is provided with a feed inlet 10 and a burner 11, the burner 11 is connected with a primary air inlet pipe 12, and the lower part of the tail flue 2 is also provided with an air preheater 13 communicated with the primary air inlet pipe 12.

When the steam and heat conducting oil mixed type circulating fluidized bed boiler provided by the embodiment works, fuel enters through the feed inlet 10, the primary air inlet pipe 12 supplies air to the combustor 11 through the fan to combust the fuel, smoke generated after combustion rises in the hearth 1 and sequentially passes through the dense-phase zone 1a, the lower dilute-phase zone 1b and the upper dilute-phase zone 1c, thereby respectively exchanging heat with the membrane wall pipe 4 and the heat conducting oil pipe 5, then the high-temperature flue gas passes through the cyclone separator 3, the particles in the high-temperature flue gas fall to the bottom of the cyclone separator 3 and return to the hearth 1, the separated high-temperature flue gas enters the tail flue 2, in the process of flowing downwards in the tail flue 2, the heat exchange is respectively carried out with the convection heating pipe 6 and the energy saver 7, the purpose of fully utilizing heat energy is achieved, and finally, tail flue gas can be discharged outside through a smoke exhaust pipe or a chimney connected with the tail flue 2.

The water and the heat conduction oil are heated by partially coating the film type wall pipe 4 and the heat conduction oil pipe 5 at different parts of the hearth 1, the energy saver 7 and the convection heating pipe 6 of the tail flue 2 can respectively provide more sufficient heat exchange for the water and the heat conduction oil, and the effect of simultaneously outputting steam and the heat conduction oil is finally realized.

Preferably, the furnace 1 is connected with a secondary air inlet pipe 14, the secondary air inlet pipe 14 is also communicated with the air preheater 13, and of course, the secondary air inlet pipe 14 can be connected with an additional fan to supply air to the furnace 1, so as to enhance the air quantity in the furnace and simultaneously achieve the effect of stirring the fuel particles in the furnace, thereby enabling the fuel to be more fully combusted and improving the combustion efficiency.

It should be noted that, as will be appreciated by those skilled in the art, the air preheater 13 of the above embodiment may be constructed in any manner known in the art, such as a serpentine airflow channel, and the present application is not limited thereto, as long as the air entering the primary air inlet duct 12 and the secondary air inlet duct 14 can pass through the air preheater 13 first to be in preheating exchange with the back pass 2.

More preferably, the upper end of the cyclone separator 3 is connected with the furnace 1 and the tail flue 2, the lower end of the cyclone separator 3 can be connected with the dense phase zone 1a through a U-shaped material returning device 15, the U-shaped material returning device 15 comprises a front pipe connected with the cyclone separator 3 and a rear pipe connected with the furnace 1, and a loosening fan (not shown in the drawing) connected with the front pipe and a material returning fan (not shown in the drawing) connected with the rear pipe can be further arranged at the bottom of the U-shaped material returning device, so that the effects of accelerating material returning and preventing material accumulation are achieved.

More preferably, the economizer 7 is designed as a serpentine, so that the water entering the water inlet pipe 9 can be preheated to some extent by the serpentine before entering the membrane wall pipe 4.

In addition, in the embodiment, the furnace 1, the tail flue 2 and the cyclone separator 3 can be all installed on the support 16, the matched support 16 is firstly arranged on the site, then the furnace 1, the cyclone separator 3 and the tail flue 3 are installed, and the steam drum 8, the convection heating pipe 6, the air preheater 13 and other parts can be installed in the workshop and then sent to the site for rapid assembly.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims (5)

1. Steam and conduction oil mixed type circulating fluidized bed boiler, including furnace (1), afterbody flue (2) and cyclone (3) of connecting furnace (1) and afterbody flue (2), its characterized in that: the hearth (1) comprises a dense-phase area (1 a), a lower dilute-phase area (1 b) and an upper dilute-phase area (1 c), wherein smoke is guided to sequentially pass through the dense-phase area (1 a), the lower dilute-phase area (1 b) and the upper dilute-phase area (1 c), membrane-type wall pipes (4) for flowing water are coated outside the dense-phase area (1 a) and the lower dilute-phase area (1 b), heat-conducting oil pipes (5) are coated outside the upper dilute-phase area (1 c), the tail flue (2) guides the smoke to flow from top to bottom, a convection heating pipe (6) connected with the heat-conducting oil pipes (5) is arranged on the upper portion of the tail flue (2), an oil inlet is formed in the convection heating pipe (6), an oil outlet is formed in the heat-conducting oil pipes (5), an energy saver (7) connected with the membrane-type wall pipes (4) is arranged on the lower portion of the tail flue (2), a steam drum (8), the energy-saving device is characterized in that the water inlet pipe (9) is connected with the energy-saving device (7) and the membrane wall pipe (4), the hearth (1) is provided with a feed inlet (10) and a burner (11), the burner (11) is connected with a primary air inlet pipe (12), and the lower part of the tail flue (2) is also provided with an air preheater (13) communicated with the primary air inlet pipe (12).

2. The steam and conduction oil mixed type circulating fluidized bed boiler according to claim 1, wherein: the furnace chamber (1) is connected with a secondary air inlet pipe (14), and the secondary air inlet pipe (14) is communicated with an air preheater (13).

3. The steam and conduction oil mixed type circulating fluidized bed boiler according to claim 2, wherein: the upper end of the cyclone separator (3) is connected with the hearth (1) and the tail flue (2), and the lower end of the cyclone separator (3) is connected with the dense-phase region (1 a) through a U-shaped material returning device (15).

4. The steam and conduction oil mixed type circulating fluidized bed boiler according to claim 3, wherein: the energy saver (7) is a coiled pipe.

5. The steam and conduction oil mixed type circulating fluidized bed boiler according to claim 4, wherein: the hearth (1), the tail flue (2) and the cyclone separator (3) are all arranged on the bracket (16).

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