CN210717594U

CN210717594U - Chain type fire grate system of high-grade direct method zinc oxide production line

Info

Publication number: CN210717594U
Application number: CN201921803487.1U
Authority: CN
Inventors: 梁峰; 俞金长; 梁云; 蔡锦华; 李天朝
Original assignee: Hezhang Lingxuan Environmental Protection Technology Co Ltd
Current assignee: Hezhang Lingxuan Environmental Protection Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-06-09
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a chain formula grate system of high-grade direct method zinc oxide production line, including grate and transmission, transmission includes driving motor and speed reducer, the speed reducer is connected with driving shaft (2), driving sprocket (3) installation is fixed on driving shaft (2), driven shaft (6) are fixed at driven groove roller (7) both ends center, the chain of going up grate (1) rolls on last grate gyro wheel (4) under the drive of driving sprocket (3) and advances, lower grate (1) rolls on lower grate gyro wheel (5) and advances, the driven end of grate (1) is driven by driven groove roller (7), the chain cover is in the recess of driven groove roller (7), it installs on angle steel support (10) to go up grate gyro wheel (4) and lower grate gyro wheel (5), angle steel support (10) are installed on I-steel support (11). The utility model provides a high-efficiency low-cost production device for producing high-grade direct method zinc oxide, and the operation is reliable and stable.

Description

Chain type fire grate system of high-grade direct method zinc oxide production line

Technical Field

The utility model relates to the technical field of non-ferrous metal smelting, in particular to a chain type grate system of a high-grade direct method zinc oxide production line.

Background

The direct method zinc oxide is obtained by smelting zinc calcine and zinc ore raw materials directly through reactions such as reduction, oxidation and the like by a pyrogenic process, the current method for producing the high-grade direct method zinc oxide generally adopts a Wechsler furnace production method, and the Wechsler furnace is a production line of intermittent operation type static fixed hearth smelting, manual feeding and manual slag raking. The static fixed hearth smelting and intermittent operation of the Webster furnace have the advantages of less mechanical dust emission, impurity discharge by a waste gas extraction process, and the produced product zinc oxide by the direct method has the advantages of good quality and high grade.

However, although the production of high-grade direct zinc oxide by using the described wecker production line can achieve the production goal of producing high-grade direct zinc oxide, the production process is manually operated, which results in high labor intensity, large heat radiation and high labor requirement. The method is characterized in that the general hearth area is 6-12 square meters under the influence of manpower capacity, the charge per furnace is 2.7 tons at most, nine furnaces are 24.3 tons per day, the per-person charge amount is 0.52 ton, the direct recovery rate of zinc is less than 90 percent, the daily output of direct method zinc oxide of each production line is less than 8 tons, the per-person output is less than 0.14 ton of zinc oxide, the production efficiency is low, the production cost is high, the method is influenced by manual operation, the quality of charge and raking slag is unstable, sometimes, the charged bottom coal is uneven and agglomerated ore is piled, the raking slag is not clean, the smelting process is unstable, and the product recovery rate and the product quality are easily reduced. The Wegener furnace production line has the defects of small treatment capacity, low production efficiency and high production cost, and the method has obvious defects along with the rise of labor cost, high production cost and low market competitiveness.

The fire grate is a part for stacking solid fuel in a boiler or an industrial furnace and enabling the solid fuel to be effectively combusted, and the whole fire grate mainly comprises a frame and a fire grate segment. The grate segments are usually made of cast iron, the necessary ventilation gaps are maintained between the segments after assembly, and separate ventilation chambers capable of adjusting air volume are arranged below the grate so that air can enter the fuel layer through the gaps for combustion. The burnt ash is discharged by manual or mechanical method. The grate can be of fixed type, movable type, reciprocating type, vibrating type, underfeed type and the like. The chain type fire grate is one of movable fire grates, the fire grate is always in a continuous moving state during operation, the fire grate pieces are fixed on a support or a support at the upper part of the chain, referring to fig. 4 and 5, the transmission mode is sliding, the chain is driven by a chain wheel, the upper row of fire grate pieces slowly slide on a guide rail, and the guide rail is a plane guide rail; the lower grate plate naturally droops without support, and the gravity of the grate and accessories is transmitted to the driving shaft and the driven shaft for bearing. The driving device adopts a special chain type grate speed reducer, is suitable for the characteristic of low-speed heavy-load operation, and the rotating speed of the grate is 0.02 r/min-0.25 r/min. Coal falls on the fire grate evenly from a coal hopper at the front end of the fire grate. Along with the backward movement of the fire grate, the coal is ignited and burned until it is burnt out, and the furnace bottom continuously blows air to support combustion. The chain grate has reliable operation, stable combustion and wide fuel adaptability, and is widely used in industrial boilers.

To this end, the present inventors have devised a grate system for a production line for producing high grade direct process zinc oxide.

Disclosure of Invention

The utility model provides a chain formula grate system of high-grade direct method zinc oxide production line, this chain formula grate system has absorbed the advantage of weskit's stove well, static fixed hearth is smelted and intermittent operation's advantage-mechanical raise dust is few and have and take out waste gas technology discharge impurity promptly, absorb the automatic advantage of slagging tap and mechanized operation of chain formula grate stove simultaneously, the chain formula grate system of a unique high grade direct method zinc oxide production line of creative design, both overcome the influence of weskit's stove manual operation factor, overcome the shortcoming of chain formula grate stove low-speed operation again, the system operation is stable, high production efficiency, direct method zinc oxide product quality who has production is good, the advantage of high grade.

The utility model provides a following technical scheme:

a chain type fire grate system of a high-grade direct method zinc oxide production line is characterized in that: the grate comprises a grate and a transmission device, wherein the transmission device comprises a driving motor and a speed reducer, the speed reducer is connected with a driving shaft, a driving chain wheel is fixedly arranged on the driving shaft, a driven shaft is fixedly arranged at the centers of two ends of a driven groove roller, a chain of an upper grate is driven by the driving chain wheel to roll on an upper grate roller to drive a grate segment to rapidly move, the lower grate is driven by the lower grate roller to roll, the driven end of the grate is driven by the driven groove roller, the chain is sleeved in a groove of the driven groove roller, the upper grate roller and the lower grate roller are arranged on an angle steel bracket, and the angle steel bracket is arranged on an I; the weight of each part of the upper grate and the weight of materials are transmitted to the I-shaped steel bracket by the upper grate roller through the angle steel bracket; the weight of each part of the lower grate is transferred to the I-shaped steel bracket by the lower grate roller through the angle steel bracket.

The grate is internally provided with a furnace bottom air distribution box which is correspondingly provided with a furnace bottom blast air chamber and a furnace bottom air channel.

An independent cooling air chamber, a cooling air inlet and a cooling air outlet are also arranged in the grate, are separated from the furnace bottom air distribution box, and are independently and forcibly ventilated and cooled by the I-shaped steel bracket.

The speed reducer is connected with the driving shaft through a cross coupling.

The bottom of the fire grate is provided with an ash cleaning port.

One end of the driving shaft is provided with an adjusting screw.

The bottom I-steel bracket is arranged on the channel steel bracket.

The utility model discloses the principle: the utility model discloses a mode of chain formula grate intermittent type operation is adopted in production mode, and this kind of production mode need start the grate in the twinkling of an eye and slag tap, and the gravity and the frictional force of grate and material are very big, moreover the utility model discloses the grate rotational speed is five to six times of general chain formula grate rotational speed, and various loads, alternating load, the torsion of production are very big, and counter shaft and actuating system's atress is very big, the utility model discloses a lower grate adopts the roller drive to replace guide rail sliding drive to rolling friction replaces sliding friction, and the weight of lower grate passes through the gyro wheel and transmits for the I-steel support, and these all greatly reduced the atress of driving shaft and driven shaft. The grate high-speed drive operation, easy off tracking, the utility model discloses install on the driven shaft and take the notched driven groove cylinder, the grate chain is spacing not the off tracking in the recess of cylinder, ensures the stability of high-speed operation. The smelting in-process can produce a large amount of heats, and the heat is transmitted for each part like supporting the I-steel support through modes such as radiation, conduction, convection current, and especially stove bottom and bottom coal ignite and the process of intensification stop the stove bottom blast air when slagging tap, if the supporting steel structure does not take cooling measure and method, the supporting structure of grate warp easily and produce the trouble in smelting high temperature, directly leads to the grate transmission system to become invalid, takes place great mechanical equipment accident even, and adopts the utility model discloses a continuous blast forced cooling of this kind of independent cooling plenum ensures the overall process of smelting and thoroughly cools off supporting structure, and the I-steel support of bearing is not heated, ensures that steel construction and other parts do not warp and stability in smelting high temperature environment.

The utility model discloses possess following beneficial effect:

1. the utility model discloses change the mode that chain formula grate removed the operation, adopt intermittent type operation, the smelting process divides the apparatus of production to gather dust for the time quantum, and the direct method zinc oxide of producing is of high quality and grade.

2. The utility model discloses start drive arrangement when slagging tap to drive the grate motion and slag tap, the grate rotational speed reaches 1.20r/min, realizes the high-speed operation of heavy load, reduces the time of slagging tap, improves production efficiency.

3. The utility model greatly reduces the stress of the fire grate transmission part during heavy load quick start and operation, ensures the stability of the fire grate and the transmission device under the conditions of intermittent operation and heavy load quick operation, uses roller transmission on the upper row and the lower row of the fire grate, changes the sliding operation of the guide rail, replaces sliding in a rolling way in a transmission mode, reduces friction force, particularly, the lower row of the fire grate adopts roller transmission and transmits gravity to the supporting I-steel bracket, and greatly reduces the stress of a fire grate driving shaft and a driven shaft; the driving shaft is provided with a chain wheel, the chain wheel drives the chain to advance, the driven shaft is provided with a roller with a groove, the chain is limited, the deviation is prevented, and the stability of high-speed running of the fire grate is ensured.

4. Be equipped with the stove bottom wind distributor box in the grate, still be equipped with independent cooling plenum in the grate, separate with stove bottom wind distributor box, independent system, independent fan and wind channel, forced continuous ventilation cooling I-steel support for the I-steel support is indeformable in process of production, avoids steel construction and other parts to warp in smelting high temperature environment, reduces maintenance rate and improve equipment's life, the utility model discloses the production line of using ordinary steel preparation can reach higher reliability and life.

5. The utility model provides a production facility with high efficiency and low cost for producing high-grade zinc oxide, and the operation is reliable and stable.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view A-A and B-B of FIG. 2;

FIG. 4 is a schematic view of a conventional chain grate furnace;

fig. 5 is a top view of fig. 4.

In the figure: 1. a grate; 2. a drive shaft; 3. a drive sprocket; 4. an upper grate roller; 5. a lower grate roller; 6. a driven shaft; 7. a driven grooved drum; 8. a furnace bottom air distribution box; 9. a cooling air outlet; 10. an angle iron bracket; 11. an I-steel bracket; 12. a channel steel bracket; 13. an independent cooling plenum; 14. a cross coupling; 15. cleaning the ash hole; 16. adjusting the screw rod; 17. a furnace bottom air channel; 18. and a cooling air inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a chain grate system for a high-grade direct zinc oxide production line is characterized in that: the fire grate comprises a fire grate 1 and a transmission device, wherein the transmission device comprises a driving motor and a speed reducer (omitted in the figure), the speed reducer is connected with a driving shaft 2, a driving chain wheel 3 is fixedly installed on the driving shaft 2, a driven shaft 6 is fixedly arranged at the center of two ends of a driven groove roller 7, a chain of an upper fire grate 1 is driven by the driving chain wheel 3 to roll on an upper fire grate roller 4 to drive a fire grate sheet to rapidly move, the lower fire grate 1 rolls on a lower fire grate roller 5 to move, the driven end of the fire grate 1 is driven by the driven groove roller 7, the chain is sleeved in a groove of the driven groove roller 7, the upper fire grate roller 4 and the lower fire grate roller 5 are installed on an angle steel bracket 10, and the angle; the weight of each part and the weight of materials of the upper grate 1 are transmitted to an I-shaped steel bracket 11 by an upper grate roller 4 through an angle steel bracket 10; the weight of each part of the lower grate 1 is transferred to an I-shaped steel bracket 11 by a lower grate roller 5 through an angle steel bracket 10.

A furnace bottom air distribution box 8 is arranged in the grate 1 and is correspondingly provided with a furnace bottom blast air chamber and a furnace bottom air channel 17.

An independent cooling air chamber 13, a cooling air inlet 18 and a cooling air outlet 9 are also arranged in the grate 1, are separated from the furnace bottom air distribution box, and are independently forced to ventilate and cool the I-shaped steel bracket 11.

The reducer is connected with a driving shaft through a cross coupling 14.

The bottom of the fire grate is provided with an ash cleaning port 15.

One end of the driving shaft 6 is provided with an adjusting screw 16.

The bottom i-beam bracket 11 is mounted on the channel bracket 12.

The production line for producing the high-grade zinc oxide by the direct method comprises a furnace body, wherein the furnace body is built on a grate frame, the furnace body is connected with an oxidation chamber through a smoke throat in the middle, and the oxidation chamber is respectively connected with a smoke tunnel, a waste gas dust collecting system, a dust collecting chamber, a cooling chamber, a pulse dust collector, a desulfurizing tower, an induced draft fan and a chimney.

The fire grate is operated intermittently, the driving device is started to drive the fire grate to move for deslagging when deslagging is carried out, the rotating speed of the fire grate reaches 0.5 r/min-1.20 r/min, heavy-load high-speed operation is realized, deslagging time is reduced, and the fire grate is still after deslagging, namely static smelting is carried out.

The upper row and the lower row of the fire grate are driven by rollers, the sliding operation of the guide rail is changed, the transmission mode replaces sliding by rolling, the friction force is reduced, and the stress of a driving shaft and a driven shaft of the fire grate is reduced;

the driving shaft is provided with a chain wheel, the chain wheel drives a chain to advance, and the driven shaft is provided with a roller with a groove, so that the chain is limited, the deviation is prevented, and the stability of high-speed operation is ensured;

the roller is arranged on an angle steel bracket, the angle steel bracket is arranged on an I-shaped steel bracket, and the I-shaped steel bracket bears the weight of the fire grate, the roller, the angle steel and the weight of materials.

The I-steel bracket is separated into an independent cooling air chamber by using a steel plate, is separated from a furnace bottom blast air chamber and a lower grate and is independently and forcibly ventilated and cooled, so that the I-steel bracket is not deformed in the production process.

The utility model discloses the advantage of weishi stove has been absorbed well, static fixed hearth is smelted and intermittent type operation's advantage-mechanical raise dust is few and have the exhaust gas technology discharge impurity of taking out promptly, absorb the automatic advantage of slagging tap and mechanized operation of chain formula grate furnace simultaneously, the creative chain formula grate system who designs a unique high grade direct method zinc oxide production line, both overcome the influence of weishi stove manual operation factor, overcome the shortcoming of chain formula grate furnace low-speed operation again, the system operation is stable, high production efficiency, the direct method zinc oxide product quality who has production is good, the advantage of level height, it is a high-grade direct method zinc oxide production system of high efficiency low cost.

The unexplained parts related to the present invention are the same as or implemented by using the prior art.

Claims

1. A chain type fire grate system of a high-grade direct method zinc oxide production line is characterized in that: the fire grate comprises a fire grate and a transmission device, wherein the transmission device comprises a driving motor and a speed reducer, the speed reducer is connected with a driving shaft (2), a driving chain wheel (3) is fixedly installed on the driving shaft (2), a driven shaft (6) is fixedly arranged at the centers of two ends of a driven groove roller (7), a chain of an upper fire grate (1) is driven by the driving chain wheel (3) to roll on the upper fire grate roller (4) to advance, the lower fire grate (1) rolls on a lower fire grate roller (5) to advance, a driven end of the fire grate (1) is driven by the driven groove roller (7), the chain is sleeved in a groove of the driven groove roller (7), the upper fire grate roller (4) and the lower fire grate roller (5) are installed on an angle steel bracket (10), and the angle steel bracket (10) is installed on an.

2. The chain grate system of the high-grade direct zinc oxide production line according to claim 1, wherein: a furnace bottom air distribution box (8) is arranged in the grate (1) and is correspondingly provided with a furnace bottom blast air chamber and a furnace bottom air channel (17).

3. The chain grate system of the high-grade direct zinc oxide production line according to claim 1, wherein: an independent cooling air chamber (13), a cooling air inlet (18) and a cooling air outlet (9) are also arranged in the grate, are separated from the furnace bottom air distribution box, and are independently and forcibly ventilated and cooled by an I-shaped steel bracket (11).

4. The chain grate system of the high-grade direct zinc oxide production line according to claim 1, wherein: the speed reducer is connected with the driving shaft through a cross coupling (14).

5. The chain grate system of the high-grade direct zinc oxide production line according to claim 1, wherein: the bottom of the fire grate is provided with an ash cleaning port (15).

6. The chain grate system of the high-grade direct zinc oxide production line according to claim 1, wherein: one end of the driving shaft (2) is provided with an adjusting screw rod (16).

7. The chain grate system of the high-grade direct zinc oxide production line according to claim 1, wherein: the bottom I-shaped steel bracket (11) is arranged on the channel steel bracket (12).