CN201396930Y

CN201396930Y - Hot blast stove heat exchanger

Info

Publication number: CN201396930Y
Application number: CN2009200136364U
Authority: CN
Inventors: 曹顺; 王延华; 徐弘彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-12
Filing date: 2009-05-12
Publication date: 2010-02-03
Anticipated expiration: 2019-05-12

Abstract

The utility model relates to a hot blast stove heat exchanger which comprises a combustion chamber and four heat exchanging chambers. The combustion chamber is provided with a semi-circle covering shell reclaiming waste heat. The utility model is characterized in that an induced draft pipeline is arranged between the opposite sides of the combustion chamber and a second heat exchanging chamber, which is connected with an induced draft fan in negative pressure. The air outlet diffuser of the induced draft fan is connected with a fourth heat exchanging chamber in positive pressure. A first heatexchanging chamber, a third heat exchanging chamber and the fourth heat exchanging chamber have the same level and are communicated. The advantage of the utility model is that the design makes a fan absorb secondary high temperature heat exchanging air flow at first, send to the lowest temperature heat exchanging chamber, then enter the higher high temperature chamber and at last is discharged outof the highest high temperature chamber. The utilization efficiency of the heat energy is improved. At the same time, the secondary high temperature air flow enters in the negative pressure so that the heat carrier air flow is heated outside the fan and the mechanical efficiency of the fan is improved. The design prolongs the heat exchanging process by two to three times without increasing the curve of a hot air path. Because the heat exchanging manner is reasonable and the highest temperature chamber has a fire resistant lining pipe, the pipe has long service life and low cost.

Description

The heat exchanger of hot-blast stove

Technical field

The utility model relates to coal-burning boiler and grain drying device, the heat exchange structure of hot-blast stove.

Background technology

The patentee's the ZL200620091562.2 of patent formerly " heat exchange structure of dryer body of heater " in provide the waste heat recovery structure: the cavity that the cladding housing constitutes outside positions such as the high combustion chamber of temperature, smoke-box, flue nest of tubes and chimney are all set up, and have the cold wind intake to communicate with the external world.High-temperature flue gas after being come out by the combustion chamber at first enters in this smoke pipe of distinguishing first heat exchanger, the smoke pipe wall periphery air generation air-flow that is heated, the cold wind mouth of the body of heater and the first Heat Room housing inserts the side of first Heat Room, and this side residue face portion is opened wide, allow cold wind directly be blown into, but this structure still is not enough to take away the heat in first heat exchanger, and the flue tube wall is often burnt rubescently.This explanation heat exchange measure has problem.Such settling mode has appearred for this reason: machine burning stove for example, and establish three sections heat exchangers in the body of heater side, or establish blower fan in temperature end, establish blower fan at three heat exchanger front ends arranged side by side or end, allow cold wind enter from the heat exchanger low-temperature end.The result of this way is: exchange with cold air earlier at low temperature side flue tube cluster, because the temperature of this position pipe is not high enough, make flue gas condensing appearance liquid state in the tube wall, have water to reveal and condense in inside pipe wall and cause the plugging consequence with cigarette ash, but still not raising of rate of heat exchange.The plugging phenomenon also appears in the nest of tubes of first heat exchanger, and the diameter of this part flue tube is identical with the caliber of other heat exchanger, is minor diameter all, and plugging also easily takes place grey fractional melting at high temperature managing.

Summary of the invention

The purpose of this utility model provides a kind of heat exchanger of hot-blast stove, has improved rate of heat exchange, and energy-saving effect is remarkable, and has solved the plugging problem, can also prolong the life-span of pipe, and the cost of high temperature pipe is low.

The heat exchanger of hot-blast stove, include combustion chamber and four Heat Rooms of the half cycle cladding housing of waste heat recovery, the combustion chamber and the first Heat Room upper space are smoke-box, it is characterized in that between the opposite side of the combustion chamber and second Heat Room, settling induced pipe, and be connected with the air-introduced machine negative pressure, the exhaust outlet diffuser malleation of air-introduced machine connects the 4th Heat Room; First Heat Room, the 3rd Heat Room and the 4th Heat Room level are contour and communicate.

The design's heat exchange structure is applicable to medium and small tonnage boiler, and following distinguishing feature is arranged: 1, blower fan at first sucks time high temperature, gives the lowest temperature Heat Room, and then enters higher temperatures, discharged by highest temperature chamber at last, has improved the utilization ratio of heat energy.2, the hot blast of Qu Chuing comprises the recovery waste heat of cladding simultaneously, gives the 4th Heat Room of lowest temperature again, is that energy-conservation to make in the pipe of this position flue gas be unlikely to Yin Wendu again low to liquid state and unboiled water reveals like this, thereby avoids plugging.3, the position of blower fan and negative pressure suck the exposed cold air of time hot room, make the heat carrier that arrives blower fan be unlikely to degrees of expansion, thereby have improved the mechanical efficiency of blower fan.4, the caliber in first Heat Room increases, in fire-resistant bushing pipe is arranged, increase the service life.5, the arrangement mode of each heat exchanger has determined it to make that cigarette road and hot blast road are for several times circuitous up and down and has turned back, and makes heat exchange process prolong 2-3 doubly.6, establish induced pipe and make air-flow quicken, strengthen the effect of air displacement amount in addition, the positive and negative pressure combination makes the nest of tubes of second heat exchanger avoid overheated, plays the effect of protection tube wall, and reduces the curve resistance of cigarette road and wind path, reduces the plugging probability.

Description of drawings

Fig. 1 is the front view of the heat exchanger of hot-blast stove;

Fig. 2 is the A-A view of Fig. 1;

The specific embodiment

The heat exchanger of hot-blast stove, include the combustion chamber 1 of the half cycle cladding housing 2 of waste heat recovery, also there is heat-insulation layer in four Heat Room outsides, see Fig. 1, combustion chamber 1 and first heat exchanger, 3 upper spaces are smoke-box, combustion chamber 1 and first Heat Room, 3 upper spaces are smoke-box, it is characterized in that settling induced pipe 6 between combustion chamber 1 and second Heat Room, 4 opposite sides, and be connected with air-introduced machine 7 negative pressure, the wind exhausting outlet malleation of air-introduced machine 7 connects the 4th Heat Room 8; First Heat Room 3, the 3rd Heat Room 9 and the 4th Heat Room 8 levels are contour and communicate, and see Fig. 2; The housing 2 of smoke-box outside is extended to get off to half of second Heat Room, 4 open-position-sides by first Heat Room, 3 outer walls, and the cold wind that boiler fan 5 will be entered by cladding housing 2 air inlets of 1 bottom, combustion chamber is sent into second Heat Room 4 behind recovery waste heat.Direction of arrow signal cold air is flowed through and is entered drying tower behind the Heat Room among the figure.

The heat exchanger of the design's hot-blast stove, seal second Heat Room 4 and the same facade of first Heat Room, 3 air outlets and corresponding, in addition two facades be uncovered, wherein a uncovered facade heat exchanger tube is exposed, obverse upper and lower horizontal sides and uncovered facade with seal facade and intersect the stile half cycle that is connected combustion chamber 1 that extends and clad housing 2, make second Heat Room 4 form three cladding faces, four frames of mouth end are flange, connect induced pipe 6.

First Heat Room 3, the 3rd Heat Room 9 and the 4th Heat Room 8 each layer tube sheet levels are connected, and shared two opposite side front covers and binding; The 3rd Heat Room 9 and the 4th Heat Room 8 shared back covers.

First Heat Room 3 and second Heat Room, 4 shared same flue nest of tubes, caliber is greater than the caliber in other heat exchanger, and each flue tube combines with the upper, middle and lower tube sheet is vertical respectively, is divided into two Heat Rooms by sagging plate.Two corresponding facades of first Heat Room 3 sealing, the 3rd facade and the 3rd Heat Room join, and corresponding facade picks out the air port to drying tower or use the hot junction.

The flue tube of first heat exchanger 3 inwall suitable for reading has refractory lining, uses the refractory material coated, or the fire-resistant bushing pipe of jumping a queue and cooperating with the flue tube inwall.First and third, the length of tube of the flue tube in four Heat Rooms 3,8,9 equates.

Heat exchange air-flow: comprise that recovery waste heat that forms through cladding 2 chambeies and the cold wind that is directly entered by second Heat Room, 4 outsides are after displacement, after under air-introduced machine 7 suction functions inferior high temperature gas flow behind the Heat Room 4 being sucked air-introduced machines 7 through induced pipe 6, transfer positive pressure gas to and flow to the 4th heat exchanger 8, the 3rd heat exchanger 9 and first heat exchanger, 3 malleations and blow out, and send hot blast to the grain drying tower.The heat exchange air-flow replaces rapidly in each chamber of temperature gradient is arranged mutually, makes the heat exchange air-flow take away heat energy with the big temperature difference, thereby makes heat energy be fully used and reclaim.

Claims

1, the heat exchanger of hot-blast stove, outside including the combustion chamber (1) of the half cycle cladding housing (2) of waste heat recovery, four Heat Rooms heat-insulation layer is arranged, combustion chamber (1) is a smoke-box with first Heat Room (3) upper space, smoke-box shell body and Heat Room shell body are established boiler fan (5), it is characterized in that in combustion chamber (1) settling induced pipe (6) between relative with second Heat Room (4), and be connected with air-introduced machine (7) negative pressure, the wind exhausting outlet malleation of air-introduced machine (7) connects the 4th Heat Room (8); First Heat Room (3), the 3rd Heat Room (9) and the 4th Heat Room (8) level are contour and communicate; Behind recovery waste heat, send into second Heat Room (4) by the cold wind that the periphery housing air inlet bottom combustion chamber (1) enters.

2, the heat exchanger of hot-blast stove according to claim 1, the heat exchanger that it is characterized in that hot-blast stove, second Heat Room (4) sealing and the same facade of first Heat Room (3) air outlet and corresponding, in addition two facades be uncovered, wherein a uncovered facade heat exchanger tube is exposed, obverse upper and lower horizontal sides and uncovered facade with seal facade and intersect stile and extend and be connected the cladding housing (2) of combustion chamber (1), make second Heat Room (4) form three cladding faces, four frames of mouth end are flange, connect induced pipe (6).

3, the heat exchanger of hot-blast stove according to claim 1 is characterized in that first Heat Room (3), the 3rd Heat Room (9) and the 4th Heat Room (8) each layer tube sheet level are connected, and the front cover of shared two opposite sides and binding; The 3rd Heat Room (9) and the shared back cover of the 4th Heat Room (8).

4, the heat exchanger of hot-blast stove according to claim 1 is characterized in that the housing (2) of smoke-box outside is extended to get off to half of second Heat Room (4) open-position-side by first Heat Room (3) outer wall.