CN201335536Y

CN201335536Y - Boiler waste heat recovery device

Info

Publication number: CN201335536Y
Application number: CNU2009200883061U
Authority: CN
Inventors: 李玉杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-12
Filing date: 2009-01-12
Publication date: 2009-10-28
Anticipated expiration: 2019-01-12

Abstract

The utility model discloses a boiler waste heat recovery device, which can effectively absorb waste heat from boiler flue gas so as to reduce the heat energy waste and obtain hot air. The utility model adopts the technical scheme that the device comprises an inlet box, heat transfer tubes, a gas collecting tube and an induced draft fan; one end of each heat transfer tube is vertically distributed on one side surface of the inlet box and is communicated with the inlet box while the other end thereof is connected with the gas collecting tube; the outlet of the gas collecting tube is connected with the air inlet of the induced draft fan; a smoke venting through hole is formed at the lower part of the box body of the inlet box; relative seal is adopted between the smoke venting through hole and the interior of the inlet box; all heat transfer tubes are parallel to the axis of a flue; and the induced draft fan and the air inlet at the upper part of the inlet box are arranged outside the flue, while the rest is arranged inside the flue. The utility model has the following benefits: the boiler waste heat recovery ratio is high; the hot air after heat absorption has wide application range; the device is very suitable for drying in an industrial drying chamber, and also can be used for drying wood, grain, hot pepper and the like; the energy is remarkably saved; and the cost is reduced.

Description

A kind of boiler afterheat recovering device

Technical field

The utility model relates to energy-saving field, relates in particular to a kind of device that utilizes residual heat from boiler fume to add hot-air.

Background technology

Boiler is widely used in fields such as industrial production and civil heating, the flue-gas temperature of boiler emission is general all between 160 ℃-260 ℃, present most boiler is that the flue gas of boiler is arranged into atmosphere in vain, caused the waste of many energy, with two tons of steam boilers is example, and the waste heat that per hour discharges flue gas during operate as normal is about 37.9x10 ⁴Kcal (37.9 ten thousand kilocalorie) is 24% of an interior output total amount of heat of boiler unit interval, so the recovery boiler fume afterheat has very considerable economic value.

Summary of the invention

The purpose of this utility model provides a kind of waste heat that can effectively absorb in the boiler smoke, reduces the waste of boiler heat energy, thereby obtains the boiler afterheat recovering device of hot-air.

For achieving the above object, the utility model is made up of inlet box, heat-transfer pipe, discharge, air-introduced machine, and heat-transfer pipe one end vertical distribution and is connected with inlet box on inlet box one side, the other end connects discharge, and the discharge outlet links to each other with the air-introduced machine air inlet; On the lower part box of inlet box, be provided with a smoke through hole, relative sealing between smoke through hole and the inlet box inside; Each heat-transfer pipe is all parallel with the axis of flue; The air inlet on air-introduced machine and inlet box top is located at outside the flue, and remainder is arranged in the flue.

For avoiding air to be heated to enter some dusts, rainwater etc., the air inlet place on inlet box top is provided with dust cover.

Be abundant recovery waste heat better, air-introduced machine is located at the upstream of flue, and inlet box is located at the downstream of flue.

For effectively falling the flow velocity of slow air to be heated, thereby prolong the air heated time.Be provided with the separator tube group between discharge and the air-introduced machine, the separator tube group by one group of vertical arm, one group of athwartship leg and gather the pipe form; Each vertical arm one side is communicated with described discharge, and opposite side is communicated with corresponding athwartship leg respectively, each athwartship leg all with gather pipe and be communicated with, gather to manage to export and be connected with the air-introduced machine air inlet.

Good effect of the present utility model is: simple in structure, rationally distributed, air can fully absorb the outer heat of heat-transfer pipe in the inlet box, the waste heat recovery rate height of boiler, the hot-air scope of application after the heat absorption is extensive, and the oven dry of the most suitable industrial stoving chamber also can be used for fields such as desiccated wood, grain, capsicum, tobacco leaf, food processing, heating, obviously energy savings, reduce cost, the utility model is applicable to that all kinds of horizontal boilers more than 1 ton use.

Description of drawings

Accompanying drawing is the utility model overall structure user mode stereogram.

The specific embodiment

As shown in drawings, the whole horizontally set of the utility model, it comprises inlet box 1, heat-transfer pipe 4, discharge 6, separator tube group 7, air-introduced machine 9.The air inlet 13 on air-introduced machine 9 and inlet box 1 top is located at outside the flue 5, and remainder is arranged in the flue 5; Heat-transfer pipe 4 one end vertical distribution are on inlet box 1 one sides, and be connected with inlet box 1, the other end is arranged in a row tracheae 6 and is connected with one respectively, and each heat-transfer pipe 4 is all parallel with the axis of flue 5, heat-transfer pipe 4 can adopt elongated steel pipe, and its quantity is decided by total waste heat amount of boiler.The outlet of discharge 6 is communicated with separator tube group 7, and the purpose that separator tube group 7 is set is: air is detained through separator tube group 7 time in short-term, and flow velocity falls slow, thereby has prolonged the heated time of air, improves air themperature.Separator tube group 7 is by one group of vertical arm 12, one group of athwartship leg 11 and gather pipe 10 and form; Each vertical arm 12 1 side is communicated with 6 outlets of described discharge, and opposite side is communicated with corresponding athwartship leg 11 respectively, and each athwartship leg 11 is all managed 10 and is communicated with gathering, and gathers to manage 10 outlet and be connected with the air inlet of air-introduced machine 9 through a tube connector 8; Be provided with a smoke through hole 3 on inlet box 1 lower part box, the purpose that smoke through hole 3 is set is that boiler smoke is passed through; Smoke through hole 3 is a square, and madial wall 2 around smoke through hole 3 is provided with separates by madial wall 2 and inlet box 1 internal cavities, and smoke through hole 3 and inlet box 1 inner relative sealing do not advance flue gas in the inlet box 1.

For avoiding some dusts, insect, rainwater etc. enter inlet box 1, can be covered with dust cover 14 on the air inlet 13 on inlet box 1 top, these dust cover 14 integral body are the room shape, its top is the top, slope that iron sheet is made, drench with rain conveniently, be provided with intensive iron net around dust cover 14 bottoms, be used for seeing through air and preventing that insect, dust granule etc. from entering.

Because the flue-gas temperature of flue 5 upstreams is higher, be abundant recovery waste heat better, air-introduced machine 9 is located at the upstream of flue 5, and inlet box 1 is located at the downstream of flue 5.

The course of work of the present utility model is: as shown in drawings, after air-introduced machine 9 work, cool ambient air shown in small arrow, the dust cover 14 of flowing through, inlet box 1, heat-transfer pipe 4; Boiler has the flue gas of waste heat shown in big arrow, motion from right to left, pass through the flue 5 of boiler successively, the smoke through hole 3 of inlet box 1, in the space of flue gas between many heat-transfer pipes 4 when left movement, cold airs in the heat transferred heat-transfer pipe 4 outside the heat-transfer pipe 4, cold air has become hot-air, realize the effect of heat recovery, subsequently, hot-air is through discharge 6, separator tube group 7, tube connector 8 continues to be heated, and is last, extracted out by air-introduced machine 9 and is transported to drying chamber, be used to dry medicine, food, article such as tobacco leaf perhaps are transported to heating equipment and are used for heating etc.

Claims

1, a kind of boiler afterheat recovering device, it is characterized in that: it is made up of inlet box (1), heat-transfer pipe (4), discharge (6), air-introduced machine (9), heat-transfer pipe (4) one end vertical distribution are on inlet box (1) one side, and be connected with inlet box (1), the other end connects discharge (6), and the outlet of discharge (6) links to each other with air-introduced machine (9) air inlet; On the lower part box of inlet box (1), be provided with a smoke through hole (3), relative sealing between smoke through hole (3) and inlet box (1) inside; Each heat-transfer pipe (4) is all parallel with the axis of flue (5); The air inlet (13) on air-introduced machine (9) and inlet box (1) top is located at outside the flue (5), and remainder is arranged in the flue (5).

2, boiler afterheat recovering device according to claim 1 is characterized in that: the air inlet (13) on inlet box (1) top locates to be provided with dust cover (14).

3, boiler afterheat recovering device according to claim 1 is characterized in that: air-introduced machine (9) is located at the upstream of flue (5), and inlet box (1) is located at the downstream of flue (5).

4, boiler afterheat recovering device according to claim 1, it is characterized in that: be provided with separator tube group (7) between discharge (6) and the air-introduced machine (9), separator tube group (7) by one group of vertical arm (12) and one group of athwartship leg (11), gather pipe (10) and form; Each vertical arm (12) one side is communicated with described discharge (6) respectively, and opposite side is communicated with corresponding athwartship leg (11) respectively, each athwartship leg (11) all with gather pipe (10) and be communicated with, gather pipe (10) and export and be connected with air-introduced machine (9) air inlet.