CN2859431Y

CN2859431Y - Intermittent combustion casting waste sand roasting furnace

Info

Publication number: CN2859431Y
Application number: CN 200520010573
Authority: CN
Inventors: 熊鹰
Original assignee: 熊鹰
Current assignee: Chongqing Changjiang moulding material (Group) Co., Ltd.
Priority date: 2005-12-21
Filing date: 2005-12-21
Publication date: 2007-01-17
Anticipated expiration: 2015-12-21

Abstract

A intermittent combustion type baking furnace used for casting waste sand includes furnace body and combustor. It is characterized in that it still comprises of sand filling pipe and fair, sand collecting hopper etc. Combustion area , roast area and air preheating area are arranged in the heater body from up to down in turn. There arranged exhaust passageway and sand filling passageway on the top of body of furnace top. There arranged a combustor corresponding with combustion area on the furnace body. There arranged a sand separator corresponding with sand inlet of sand filling passageway on the furnace body. There arranged a air collection chamber which is feed through air induction trunk at the bottom of furnace body. There arranged a preheating tube which is feed through air collection chamber in the section of fair preheating area. There arranged a sand discharging pipe which goes through air collection chamber under the furnace body. There arranged a sand collecting hopper which is corresponding with sand discharging pipe at the sand outlet. This utility model has advantages of simple structure, low roast temperature,etc. It can reduce the roasting temperature of waste sand, save energy-consumption greatly, and make regeneration sand's regeneration effect very fine.

Description

Intermittent combustion formula cast waste sand roaster

(1), affiliated technical field

The utility model relates to a kind of recycling cast waste sand device, particularly a kind of antiquated sand roaster.

(2), technical background

In the last few years, cast waste sand had caused serious pollution to environment, and simultaneously, the minimizing day by day of high-quality resource and the first mate of freight improve, and make its recycling cast waste sand become the focus of lot of domestic and foreign foundry enterprise and founder author's concern.After for example foundry resin uses, residual in the sand have a large amount of organic matters, direct circular regeneration, in order to remove the organic matter in the old resin sand, make the regenerating used reuse, adopted many processing methods both at home and abroad, the renovation process that adopts mainly contains dry method (comprising air-flow and Mechanical Method) and hot method at present.To regeneration difficult clay-bonded sand, resin sand, and require the higher cast waste sand of regeneration effect, hot method or hot method-dry method combining and regenerating are generally all adopted in its regeneration, and wherein in antiquated sand regeneration treatment facility, its key equipment is exactly a roaster.

The utility model patent that a kind of name is called " vertical boiling type sand calcining furnace " is disclosed in CN2699220Y.This patent relates to a kind of vertical boiling type sand calcining furnace that is used for water-glass sand, casting resin sand thermal reclamation processing.Include body of heater, burner, air blast and doffer, upper of furnace body is that blanking chamber, middle part are burner hearth, lower combustion chamber, laterally separate in the burner hearth and be provided with siege, install burner on the lower wall of combustion chamber, upper side wall is provided with gas approach, and this gas approach connects the air blast smoke outlet tube, on the sidewall of blanking chamber exhanst gas outlet is set, this exhanst gas outlet connects the air blast flue gas inlet tube, and the bottom, combustion chamber is provided with drawing mechanism, and doffer is arranged at top, blanking chamber.Be somebody's turn to do " vertical boiling type sand bakes husky stove " though have characteristics such as thermal efficiency height, reliable, easy to maintenance, the useless flue-gas temperature of use is low, roasting is even, have following deficiency:

1, in the process of roasting antiquated sand, the temperature of its roasting is very high, and the temperature of combustion chamber has reached 1400～1600 ℃, and the temperature of blanking chamber has also reached 650～750 ℃, and it is very high making its energy consumption like this.

2, in roasting process, its antiquated sand roasting and inhomogeneous, the burning of the organic matter on the antiquated sand or skin covering of the surface and insufficient, make can not the meet the demands needs of high reclaimed sand of its quality.

(3), summary of the invention

The purpose of this utility model just provide a kind of simple in structure, use reliable, sintering temperature is low, the intermittent combustion formula cast waste sand roaster of less energy consumption, it can make full use of the heat that spontaneous combustion produces, carry out the batch (-type) burning, can and reach the purpose of removing the plain film of charcoal to realize economizing.

The purpose of this utility model is to realize by such technical scheme, it includes body of heater and combustor, it is characterized in that: it also includes and adds sandpipe and sand collecting hopper etc., in body of heater, be disposed with the combustion zone from top to bottom, roast area and air preheating area, be respectively arranged with exhaust passage and sand filling passageway at the body of heater top, on body of heater, be provided with combustor with the corresponding position, combustion zone, sand inlet corresponding section with sand filling passageway in the combustion zone is provided with sand separator, be provided with the remittance air chamber that is connected with inlet channel in the bottom of body of heater, in air preheating area, be provided with and converge the economizer bank that air chamber is connected, be arranged with the sandpipe that goes out that passes the remittance air chamber at body of heater, be provided with corresponding with it sand collecting hopper at the sand export place that goes out sandpipe.

The utility model is work like this: antiquated sand enters from the sand filling passageway that is arranged on the body of heater top, through the sand separator in the combustion zone, sand separator is divided into the sand curtain uniformly to antiquated sand, at this moment, burner carries out heat temperature raising to antiquated sand, form high-temperature roasting sand, the roasting sand that falls enters roast area and carries out roasting, simultaneously, the cold high pressure air enters roast area through inlet channel, remittance air chamber, economizer bank, the cold high pressure air carries out heat exchange at the high-temperature roasting sand that converges air chamber and economizer bank place and be deposited in outside the economizer bank, makes it become preheated air; The effect of preheated air in roast area: the one, stir layer of sand, make layer of sand be in fluidized state, unburned antiquated sand is mixed uniformly with high-temperature roasting sand; The 2nd, plain thing burning provides sufficient oxygen to the charcoal on the antiquated sand; When stove body temperature reaches the calcination process design temperature, combustor is just out of service, the plain thing of charcoal on the antiquated sand in roast area provides heat energy by spontaneous combustion, design temperature when making it keep calcination process, the spontaneous combustion of the plain thing of charcoal on antiquated sand can not provide enough heat to keep the roasting design temperature, combustor just restarts, roasting sand is carried out heat temperature raising, the process of batch (-type) burning so repeatedly, made full use of the heat energy that burns on the plain thing of antiquated sand charcoal, to reach the purpose that reduces energy consumption.Because the layer of sand in roast area, so just can make the plain thing completing combustion of the charcoal that burns incompletely in the burning slowly by going out sandpipe, the waste gas that produces in combustion process is discharged through the exhaust outlet at body of heater top, and the antiquated sand that roasting is good just flows in the sand collecting hopper through going out sandpipe.

Owing to adopted technique scheme, the utlity model has advantages such as simple in structure, that sintering temperature is low, use it can reduce the temperature of roasting antiquated sand, save energy consumption greatly, and make its reclaimed sand regeneration effect very good.

(4), description of drawings

Description of drawings of the present utility model is as follows:

Fig. 1 is a structural representation of the present utility model;

Among the figure: 1. body of heater; 2. combustor; 3. sand filling passageway; 4. sand collecting hopper; 5. combustion zone; 6. roast area; 7. air preheating area; 8. exhaust passage; 9. sand separator; 10. inlet channel; 11. remittance air chamber; 12. economizer bank; 13. go out sandpipe; 14. temperature inductor; 15. door;

(5), the specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1: a kind of intermittent combustion formula cast waste sand roaster, include body of heater 1 and combustor 2, it is characterized in that: it also includes sand filling passageway 3 and sand collecting hopper 4 etc., in body of heater 1, be disposed with combustion zone 5 from top to bottom, roast area 6 and air preheating area 7, be respectively arranged with exhaust passage 8 and sand filling passageway 3 at body of heater 1 top, on body of heater 1, be provided with combustor 2 with 5 corresponding positions, combustion zone, sand inlet corresponding section with sand filling passageway 3 in combustion zone 5 is provided with sand separator 9, be provided with the remittance air chamber 11 that is connected with inlet channel 10 in the bottom of body of heater 1, in air preheating area 7, be provided with and converge the economizer bank 12 that air chamber 11 is connected, body of heater 1 be arranged with pass converge air chamber 11 go out sandpipe 13, be provided with corresponding with it sand collecting hopper 4 at the sand export place that goes out sandpipe 13.

The utility model is work like this: antiquated sand enters from the sand filling passageway 3 that is arranged on body of heater 1 top, through the sand separator 9 in the combustion zone 5, sand separator 9 is divided into the sand curtain uniformly to antiquated sand, at this moment, 2 pairs of antiquated sands of combustor carry out heat temperature raising, form high-temperature roasting sand, the roasting sand that falls enters roast area 6 and carries out roasting, simultaneously, the cold high pressure air enters roast area 6 through inlet channel 10, remittance air chamber 11, economizer bank 12, the cold high pressure air carries out heat exchange at the high-temperature roasting sand that converges air chamber 11 and economizer bank 12 places and be deposited in outside the economizer bank 12, makes it become preheated air; The effect of preheated air in roast area 6: the one, stir layer of sand, make layer of sand be in fluidized state, unburned antiquated sand is mixed uniformly with high-temperature roasting sand; The 2nd, plain thing burning provides sufficient oxygen to the charcoal on the antiquated sand; When the temperature of body of heater 1 reaches the calcination process design temperature, combustor 2 is just out of service, the plain thing of charcoal on the antiquated sand in roast area 6 provides heat energy by spontaneous combustion, design temperature when making it keep calcination process, the spontaneous combustion of the plain thing of charcoal on antiquated sand can not provide enough heat to keep the roasting design temperature, combustor 2 just restarts, roasting sand is carried out heat temperature raising, the process of batch (-type) burning so repeatedly, made full use of the heat energy that burns on the plain thing of antiquated sand charcoal, to reach the purpose that reduces energy consumption.Since at the layer of sand of 6 li of roast areas slowly by going out sandpipe 13, so just can make the plain thing completing combustion of the charcoal that burns incompletely in the burning, the waste gas that produces in combustion process is discharged through the exhaust passage 8 at body of heater 1 top, and the antiquated sand that roasting is good just flows in the sand collecting hopper 4 through going out sandpipe 13.

As shown in Figure 1: body of heater 1 is provided with temperature inductor 14.It can carry out the detection of temperature to body of heater 1 at any time.

As shown in Figure 1: body of heater 1 is provided with door 15.When roaster breaks down, can open door 15 and check and overhaul.

Claims

1. intermittent combustion formula cast waste sand roaster, include body of heater (1) and combustor (2), it is characterized in that: it also includes sand filling passageway (3) and sand collecting hopper (4), in body of heater (1), be disposed with combustion zone (5) from top to bottom, roast area (6) and air preheating area (7), be respectively arranged with exhaust passage (8) and sand filling passageway (3) at body of heater (1) top, go up and corresponding position, combustion zone (5) is provided with combustor (2) at body of heater (1), sand inlet corresponding section with sand filling passageway (3) in combustion zone (5) is provided with sand separator (9), be provided with the remittance air chamber (11) that is connected with inlet channel (10) in the bottom of body of heater (1), in air preheating area (7), be provided with and converge the economizer bank (12) that air chamber (11) is connected, be provided with in body of heater (1) bottom pass converge air chamber (11) go out sandpipe (13), be provided with sand collecting hopper (4) accordingly at the sand export place that goes out sandpipe (13).

2. intermittent combustion formula cast waste sand roaster as claimed in claim 1, it is characterized in that: body of heater (1) is provided with temperature inductor (14).

3. intermittent combustion formula cast waste sand roaster as claimed in claim 1 is characterized in that: body of heater (1) is provided with door (15).