CN212747327U

CN212747327U - Metallurgical firing kiln

Info

Publication number: CN212747327U
Application number: CN202021390595.3U
Authority: CN
Inventors: 张宝良; 吴忠华
Original assignee: Kaiyuan Baohua Equipment Manufacturing Co ltd
Current assignee: Kaiyuan Baohua Equipment Manufacturing Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-19
Anticipated expiration: 2030-07-15

Abstract

The utility model relates to a metallurgical firing kiln, which belongs to the technical field of firing equipment, and comprises a kiln body, a shunting air box, a burner system, a high-temperature circulating fan and a discharge fan, wherein the shunting air box, the burner system, the high-temperature circulating fan and the discharge fan are arranged on the kiln body; a hot mixing chamber and a firing chamber are arranged in the kiln body; the burner system is used for spraying flame into the hot mixing chamber; the high-temperature circulating fan is used for blowing a high-temperature gas cylinder of the hot mixing chamber into the firing chamber through the shunt air box, the firing chamber is internally provided with a firing platform and a hot gas distribution air box, the shunt air box extends into the firing chamber, the firing chamber is internally provided with the firing platform and the hot gas distribution air box, and the shunt air box is connected with the hot gas distribution air box; the hot gas distribution air box is provided with an air outlet; the exhaust fan is communicated with the firing chamber and used for exhausting gas in the firing chamber. The utility model discloses utilize high-temperature gas to fire and toast the product of firing on the platform, make the product at whole firing in-process contactless naked light, also can make in addition fire indoor temperature field more even.

Description

Metallurgical firing kiln

Technical Field

The utility model belongs to the technical field of the technique of firing equipment and specifically relates to a metallurgical kiln of firing is related to.

Background

At present, with the continuous change and development of new materials and new processes, many new materials and new processes need to be heated at high temperature in a kiln, and after being fired, the materials are treated by quenching, tempering or dipping to change the inherent grain structure, so as to change the performance. Due to the difference of materials, the firing temperature is from 200 ℃ to 1200 ℃, in the prior art, the heating mode is almost flame heating or electric heating, the heating mode can cause the temperature field in the kiln to be uneven, and the quality and the performance of individual products are reduced to different degrees after being directly baked by flame. In addition, the wall of the old-fashioned kiln is made of refractory clay bricks, so that the old-fashioned kiln is not durable, time and labor are wasted during construction, most old-fashioned kilns need to be provided with environment-friendly equipment such as an electric oil-fired tar device and an activated carbon absorber, and even if some kilns are provided with the environment-friendly equipment, the ideal environment-friendly effect can not be achieved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, namely the problem of uneven temperature field in the kiln, the utility model aims to provide a metallurgical firing kiln, which comprises a kiln body, a shunting air box, a burner system, a high-temperature circulating fan and a discharge fan, wherein the shunting air box, the burner system, the high-temperature circulating fan and the discharge fan are arranged on the kiln body; a hot mixing chamber and a firing chamber are arranged in the kiln body; the burner system is used for spraying flame into the hot mixing chamber; the inlet of the high-temperature circulating fan is communicated with the hot mixing chamber, and the outlet of the high-temperature circulating fan is connected with the flow dividing air box; the shunting air box extends into the firing chamber, a firing platform and a hot gas distribution air box are arranged in the firing chamber, the shunting air box extends into the firing chamber, the firing platform and the hot gas distribution air box are arranged in the firing chamber, and the shunting air box is connected with the hot gas distribution air box; the hot gas distribution air box is provided with an air outlet; the exhaust fan is communicated with the firing chamber and used for exhausting gas in the firing chamber.

The utility model discloses a further set up to: the pipeline of reposition of redundant personnel bellows sets up out two branches, hot gas distribution bellows be provided with two and distribute in fire the both sides of platform, two hot gas distribution bellows with two branches of reposition of redundant personnel bellows are connected respectively.

The utility model discloses a further set up to: hot gas distribution bellows including the channel-section steel structure that is the U type the bellows main part and with bellows main part fixed connection's polylith fixed plate, the notch of bellows main part sets up, and the polylith fixed plate is located to follow in the notch the length direction interval distribution of bellows main part, adjacent space criminal field between the fixed plate the gas outlet.

The utility model discloses a further set up to: the upper surface of fixed plate is provided with the fly leaf in the laminating, set up the bar hole on the fly leaf, wear to be equipped with in the bar hole and run through the bolt of fixed plate, the fly leaf with the fixed plate along the bar hole staggers to when the at utmost, the fly leaf with the fixed plate will the gas outlet shelters from.

The utility model discloses a further set up to: the air outlet of the hot gas distribution wind direction faces the firing platform.

The utility model discloses a further set up to: the kiln body is also provided with an air receiving box communicated with the firing chamber and the hot mixing chamber.

The utility model discloses a further set up to: the exhaust fan is communicated with the firing chamber through an exhaust pipeline, and a heat recovery pipeline is fixedly coiled on the exhaust pipeline.

The utility model discloses a further set up to: still include the air-cooler and set up in fire indoor cooling bellows, the air-cooler with cooling bellows intercommunication the air-cooler with the junction of kiln body is provided with the valve.

The utility model discloses a further set up to: the combustor system is provided with a flame tube in the hot mixing chamber, and a plurality of through holes with the diameter of 20mm are uniformly distributed on the wall of the flame tube.

The utility model discloses a further set up to: still include the exhaust gas pipeline, the one end of exhaust gas pipeline is followed outside the kiln body stretches into in the flame tube, the other end of exhaust gas pipeline is connected with external waste gas source.

To sum up, the utility model discloses a beneficial technological effect does:

the product on the firing platform is fired and baked by utilizing high-temperature gas, so that the product is not in contact with open fire in the whole firing process, and in addition, the temperature field in the firing chamber can be more uniform, thereby avoiding the uneven temperature of different positions of the product or the different temperatures of different positions in the firing chamber.

Drawings

FIG. 1 is a schematic view of the metallurgical firing kiln according to the present invention.

FIG. 2 is a schematic structural view of section A-A of FIG. 1;

FIG. 3 is a schematic structural view of section B-B of FIG. 1;

FIG. 4 is a schematic top view of the metallurgical firing kiln of the present invention;

fig. 5 shows a hot gas distribution bellows according to the present invention.

Reference numerals: 11. a hot mixing chamber; 12. a firing chamber; 2. a burner system; 21. a flame tube; 31. A high temperature circulating fan; 32. a flow splitting air box; 33. a hot gas distribution windbox; 331. a fixing plate; 332. A movable plate; 4. firing the platform; 51. a cooling fan; 52. cooling the wind box; 61. a discharge fan; 62. an exhaust duct; 7. an air collecting box; 8. an exhaust gas conduit; 9. a heat recovery line.

Detailed Description

First, it should be understood by those skilled in the art that the embodiments described herein are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

The utility model provides a metallurgical firing furnace, include the kiln body and install reposition of redundant personnel bellows 32, combustor system 2, high temperature circulating fan 31 and the emission fan 61 on the kiln body.

The kiln body is internally provided with a hot mixing chamber 11 and a firing chamber 12. The hot mixing chamber 11 is a chamber for generating a hot gas flow of high temperature; the firing chamber 12 is a chamber for heating the product. The burner system 2 is used to inject a flame into the hot mixing chamber 11; the inlet of the high-temperature circulating fan 31 is communicated with the hot mixing chamber 11, the outlet of the high-temperature circulating fan 31 is connected with a flow dividing air box 32, and the flow dividing air box 32 extends into the firing chamber 12. The exhaust fan is communicated with the burning chamber 12 through an exhaust pipeline.

The burner system 2 comprises a burner body, a flame tube 21, a fuel pipeline and an air pipeline, wherein the burner body extends into the hot mixing chamber 11, the flame tube 21 is arranged in the hot mixing chamber 11 and is installed on the burner, and a plurality of through holes with the diameter of 0mm are uniformly distributed on the wall of the flame tube 21. The burner system 2 must also include a controller or the like. Since the burner system 2 is a prior art, the burner systems 2 used are all conventional products, and the burner systems 2 of different manufacturers have similar structural styles, so that the burner system 2 will not be described in detail herein.

Disposed within the firing chamber 12 are a firing platform 4 and a hot gas distribution windbox 33. The firing platform 4 is used for placing the fired product; a hot gas distribution windbox 33 is used in connection with the splitter windbox 32. The two hot gas distribution bellows 33 are arranged and distributed on two sides of the firing platform 4, and the pipeline of the flow dividing bellows 32 is provided with two branches, so that the flow dividing bellows 32 is in an inverted Y-shaped structure, and the two hot gas distribution bellows 33 are respectively connected with the two branches of the flow dividing bellows 32 in a welding manner. The hot gas distribution bellows 33 includes a bellows main body of a U-shaped channel steel structure and a plurality of fixing plates 331 fixedly connected to the bellows main body. The notch of bellows main part sets up, and polylith fixed plate 331 is located along the length direction interval distribution of bellows main part in the notch, and the space between the adjacent fixed plate 331 forms above-mentioned gas outlet.

The flame injected by the burner system 2 forms a high temperature gas within the hot mixing chamber 11. Blown by the high-temperature circulating fan 31, the high-temperature airflow in the hot mixing chamber 11 enters the firing chamber 12 through the diversion air box 32 and the hot gas distribution air box 33 in sequence. The product on the firing platform 4 is fired and baked by high-temperature airflow, so that the product is not in contact with open fire in the whole firing process, and in addition, the temperature field in the firing chamber 12 is more uniform, thereby avoiding uneven temperature at different positions of the product or different temperatures at different positions in the firing chamber 12.

In order to adjust the air output of the hot gas distribution windbox 33 and thus the temperature in the firing chamber 12, a movable plate 332 is attached to the upper surface of the fixed plate 331. The movable plate 332 is provided with a strip-shaped hole, a bolt penetrating through the fixed plate 331 is arranged in the strip-shaped hole in a penetrating manner, and when the movable plate 332 and the fixed plate 331 are staggered to the maximum extent along the strip-shaped hole, the movable plate 332 and the fixed plate 331 shield the air outlet.

The kiln body is also provided with an air collecting box 7 communicated with the firing chamber 12 and the hot mixing chamber 11, so that part of high-temperature air flow used for firing products in the firing chamber 12 can be circulated back to the hot mixing chamber 11, the hot mixing chamber 11 is favorable for keeping high temperature, and energy is saved.

The heat recovery pipe 9 is fixed to the exhaust pipe 62 by welding, that is, the heat recovery pipe 9 is spirally disposed and wound around the inner wall of the exhaust pipe 62. The heat recovery pipeline 9 refers to a pipeline for flowing a medium in a heat circulation system or a heating system of a plant, and the medium can be heat conduction oil or water. Since the high-temperature air in the firing chamber 12 is exhausted through the exhaust duct 62, a large amount of heat energy is wasted in the process, so the heat recovery pipeline 9 is arranged at the exhaust duct 62 to absorb a part of heat to heat the medium which is originally required to be heated in the factory, thereby saving energy.

The utility model also comprises an air cooler and a cooling air box 52 arranged in the firing chamber 12. The cooling blower 51 is connected with the kiln body through a valve, the cooling blower 51 is further communicated with the cooling bellows 52, the cooling blower 51 is used for blowing air into the firing chamber 12 to further play a role in cooling, and the outlet of the cooling bellows 52 faces the firing platform 4. Since the temperature in the firing chamber 12 is high after firing, when other parts are to be fired at a low temperature in the next step, the temperature is usually lowered by standing, but it takes several hours, so that the cooling speed in the firing chamber 12 is increased by using the air cooler.

The utility model discloses still include exhaust gas conduit 8, in exhaust gas conduit 8's one end stretched into flame tube 21 from the kiln body outward, exhaust gas conduit 8's the other end was connected with external waste gas source. The waste gas source refers to graphite product production equipment. Because the graphite product production process needs to use the asphalt, and a large amount of flue gas generated by the asphalt can not be directly discharged, the graphite product production process can only be treated in the past, and the part of the asphalt flue gas can be combusted after the waste gas pipeline 8 is introduced into the hot mixing chamber 11, so that the problems of difficult asphalt waste gas treatment and high cost of asphalt waste gas treatment equipment are solved. The exhaust gas generating device may be any other device capable of generating waste flammable gas.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A metallurgical firing kiln is characterized in that: the high-temperature circulating air furnace comprises a furnace body, and a shunting air box, a burner system, a high-temperature circulating fan and a discharge fan which are arranged on the furnace body;

a hot mixing chamber and a firing chamber are arranged in the kiln body;

the burner system is used for spraying flame into the hot mixing chamber;

the inlet of the high-temperature circulating fan is communicated with the hot mixing chamber, and the outlet of the high-temperature circulating fan is connected with the flow dividing air box;

the shunting air box extends into the firing chamber, a firing platform and a hot gas distribution air box are arranged in the firing chamber, and the shunting air box is connected with the hot gas distribution air box; the hot gas distribution air box is provided with an air outlet;

the exhaust fan is communicated with the firing chamber and used for exhausting gas in the firing chamber.

2. The metallurgical firing kiln of claim 1, characterized in that: the pipeline of reposition of redundant personnel bellows sets up out two branches, hot gas distribution bellows be provided with two and distribute in fire the both sides of platform, two hot gas distribution bellows with two branches of reposition of redundant personnel bellows are connected respectively.

3. The metallurgical firing kiln of claim 1, characterized in that: hot gas distribution bellows including the channel-section steel structure that is the U type the bellows main part and with bellows main part fixed connection's polylith fixed plate, the notch of bellows main part sets up, and the polylith fixed plate is located to follow in the notch the length direction interval distribution of bellows main part, adjacent space criminal field between the fixed plate the gas outlet.

4. The metallurgical firing kiln of claim 3, characterized in that: the upper surface of fixed plate is provided with the fly leaf in the laminating, set up the bar hole on the fly leaf, wear to be equipped with in the bar hole and run through the bolt of fixed plate, the fly leaf with the fixed plate along the bar hole staggers to when the at utmost, the fly leaf with the fixed plate will the gas outlet shelters from.

5. The metallurgical firing kiln of claim 4, characterized in that: the air outlet of the hot gas distribution wind direction faces the firing platform.

6. The metallurgical firing kiln of claim 1, characterized in that: the kiln body is also provided with an air receiving box communicated with the firing chamber and the hot mixing chamber.

7. The metallurgical firing kiln of claim 1, characterized in that: the exhaust fan is communicated with the firing chamber through an exhaust pipeline, and a heat recovery pipeline is fixedly coiled on the exhaust pipeline.

8. The metallurgical firing kiln of claim 1, characterized in that: still include cooling blower and set up in fire indoor cooling bellows, cooling blower with cooling bellows intercommunication cooling blower with the junction of kiln body is provided with the valve.

9. The metallurgical firing kiln of claim 1, characterized in that: the combustor system is provided with a flame tube in the hot mixing chamber, and a plurality of through holes with the diameter of 20mm are uniformly distributed on the wall of the flame tube.

10. The metallurgical firing kiln of claim 9, characterized in that: still include the exhaust gas pipeline, the one end of exhaust gas pipeline is followed outside the kiln body stretches into in the flame tube, the other end of exhaust gas pipeline is connected with external waste gas source.