CN212205614U

CN212205614U - Countercurrent vertical sintering furnace

Info

Publication number: CN212205614U
Application number: CN202020693022.1U
Authority: CN
Inventors: 张志明; 柯遵兵; 张申强
Original assignee: Huangshi Changhui Environmental Protection Equipment Co ltd
Current assignee: Huangshi Changhui Environmental Protection Equipment Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-12-22
Anticipated expiration: 2030-04-29

Abstract

The utility model provides a vertical fritting furnace against current, including barrel, broken tower tray and driver part. The device comprises a barrel, a top preheating zone, a calcining sintering zone, a cooling discharging zone, a first air channel, a feed inlet, a smoke tube, a discharge port and a second air channel, wherein the barrel is internally divided into three zones from top to bottom; the crushing tower tray is characterized in that a plurality of crushing protrusions are arranged on the upper surface of the crushing tower tray, and the crushing tower tray is driven to rotate by the driving part to crush materials. The utility model provides a vertical fritting furnace against current, the air forms against the current from bottom to top, make full use of the heat energy that the burning produced, reduced the energy consumption, improved the productivity.

Description

Countercurrent vertical sintering furnace

Technical Field

The utility model belongs to waste treatment equipment field more specifically relates to a vertical fritting furnace against current.

Background

At present, the yield of hazardous wastes in China is in a growing situation year by year. In 2015, the hazardous waste production in china reached 4220 million tons, and is expected to increase from 4850 million tons in 2016 to 7620 million tons in 2020 by a compound annual growth rate of 12.0%. It is noted that the actual yield of hazardous waste may be much higher than the annual book statistics, and the estimated actual yield of hazardous waste is 6000-10000 ten thousand tons. The method for treating the dangerous waste in China mainly comprises three methods, specifically comprises comprehensive utilization, treatment and storage, and the development directions of the dangerous waste treatment process mainly comprise two methods, namely harmless treatment and recycling treatment.

Hazardous waste disposal resources are mainstream, hydroxides of heavy metals such as copper, nickel, zinc and chromium in the copper-containing sludge are in an unstable state, if the hydroxides are randomly stacked, heavy metals are likely to be dissolved out again under the rainwater leaching effect to pollute soil or underground water and cause environmental ecology damage, and therefore the heavy metal sludge is generally classified as hazardous waste. Waste categories in the national records of hazardous waste (administered from 2008. 8.1) are HWl7 and HW 22. Because the components of the heavy metal sludge are similar to those of natural mineral products, and the metal grade is far higher than the mining grade (few tenths of the mining grade) of the mineral products, if the heavy metal sludge can be formed into a mineral form suitable for sorting and smelting by a mineralizing technology, and then the mature smelting technology is utilized to recover copper and nickel metal resources, the harm of the sludge to the environment can be reduced, and the continuous consumption of the metal resources is reduced.

The high-temperature smelting process adopted by the comprehensive utilization of the copper-containing electroplating sludge has high equipment investment cost, but has high copper recovery rate, simple recovery method and process flow, strong operability and feasible technology.

Because the copper-containing electroplating sludge has high water content and fine granularity, in order to ensure the temperature in a smelting furnace, increase the air permeability of furnace charge and improve the bed energy rate, the existing high-temperature smelting mode adopts the steps that the water content of the copper-containing sludge is reduced to about 50 percent by a rotary dryer, and then the copper-containing sludge is conveyed to a special brick making machine, added with a small amount of lime and pressed into brick-shaped materials with certain strength and granularity and used as the furnace charge of the smelting furnace. Its disadvantages are high energy consumption and low productivity of smelting furnace.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a vertical fritting furnace against current to need adopt the gyration drying-machine earlier to dry among the solution prior art, rethread brickmaking machine suppression, the mode energy consumption that rethread smelting furnace smelted is high, the problem that the smelting furnace productivity is low.

In order to achieve the technical purpose, the technical scheme of the utility model provides a vertical fritting furnace against current, include:

the device comprises a barrel, wherein the barrel is internally divided into three regions from top to bottom, the three regions are a top preheating region, a calcining sintering region and a cooling discharging region respectively, a first air channel communicated with the inside of the barrel is arranged on the side wall of the barrel corresponding to the calcining sintering region, a top cover is arranged at the top of the barrel, a feed inlet and a smoke tube communicated with the barrel are arranged on the top cover, a bottom cover is arranged at the bottom of the barrel, and a discharging opening and a second air channel communicated with the inside of the barrel are arranged on the bottom cover;

the crushing tower tray is positioned in the cooling discharge belt, a plurality of crushing bulges are arranged on the upper surface of the crushing tower tray, an annular crushing plate matched with the crushing tower tray for crushing is sleeved on the inner wall of the cylinder body along the circumferential direction, teeth are arranged at the bottom of the crushing tower tray along the circumferential direction, and the second air channel penetrates through the crushing tower tray and is communicated with the inside of the cylinder body;

and the driving part comprises a driving motor and a gear transmission mechanism fixedly connected with an output shaft of the driving motor, and the gear transmission mechanism is in meshing transmission with the teeth on the crushing tower tray.

Further, the first air channel is provided with a plurality of first air channels, and an angle between the first air channels and a horizontal plane is 5-8 degrees.

Further, the first air channels are arranged in two numbers, and the two first air channels are symmetrically arranged on two sides of the calcined sintering belt.

Further, the chimney is provided with a plurality of.

Furthermore, the crushing tower tray is of a hollow structure, the upper surface of the crushing tower tray is also provided with a plurality of through holes, and the through holes are communicated with the second air channel.

Further, the annular crushing plate is a casting, and crushing teeth are arranged on the surface of the crushing plate.

Compared with the prior art, the beneficial effects of the utility model include: the utility model provides a vertical fritting furnace against current is provided with first air duct and second air duct respectively through both sides and the bottom at the barrel, and the air is followed the combustion-supporting air is provided for the burning of buggy in first air duct and the second air duct drum barrel, follows simultaneously the air that gets into in the second air duct forms against the current from bottom to top, crosses each other with vertical fritting furnace top-down's material and accomplishes the sintering, makes full use of the heat that produces among the sintering process, has reduced the energy consumption, has still thoroughly solved the inhomogeneous phenomenon of ventilation in the kiln simultaneously, has improved the firing efficiency of grog, reaches reinforced, burns into, unloads the triple balance, and output, quality increase substantially. Compared with the prior high-temperature smelting process which needs to pass through a rotary dryer and a brick making process, the utility model discloses a countercurrent vertical sintering furnace directly carries out high-temperature smelting, and the total treatment cost is reduced by about 30-40%.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of a reverse flow vertical sintering furnace provided by the present invention;

description of reference numerals:

1-cylinder, 2-top cover, 3-feeding port, 4-chimney, 5-first air channel, 6-bottom cover, 7-second air channel, 8-crushing tray, 9-crushing bulge, 10-three zones, 101-top preheating zone, 102-sintering zone, 103-bottom discharging zone, 11-driving motor, 12-annular crushing plate, 13-gear transmission mechanism and 14-discharging port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Before solving current high temperature smelting furnace and smelting, need earlier copper-containing mud through the stoving of gyration drying-machine, send the brick machine again and add behind a small amount of lime and press into the brick type material that has certain intensity and granularity, smelt again as the furnace charge of smelting, the problem that energy consumption height and productivity that lead to are low, the embodiment of the utility model provides a vertical fritting furnace against current.

As shown in fig. 1, a counter-flow vertical sintering furnace includes a barrel 1, a crushing tray 8, and a driving part. The barrel 1 is internally divided into three areas 10 from top to bottom, wherein the three areas 10 are a top preheating zone 101, a calcining sintering zone 102 and a cooling discharging zone 103 respectively. Two first air channels 5 are arranged on the side wall of the cylinder 1 corresponding to the calcined sintering belt 102, the two first air channels 5 are symmetrically arranged on two sides of the cylinder 1, and preferably, the first air channels 5 form an angle of 5-8 degrees with the horizontal plane. The number of the first air channels 5 can also be one or more than two, which can be determined according to the actual situation. The top of barrel 1 is provided with top cap 2, be provided with on the top cap 2 with feed inlet 3 and chimney 4 of barrel 1 intercommunication. The chimney 4 can be provided in a plurality of numbers, and is mainly used for overflowing of waste gas in the sintering process. The bottom of the barrel body 1 is provided with a bottom cover 6, and a discharge opening and a second air channel 6 which are communicated with the cooling discharge belt 103 are arranged on the bottom cover 6. The first air passage 5 and the second air passage 7 are used for air blowing.

The crushing tray 6 is positioned in the cooling discharge belt 103, a plurality of crushing protrusions 9 are arranged on the upper surface of the crushing tray 6, an annular crushing plate 12 which is matched with the crushing tray 6 for crushing is sleeved on the inner wall of the barrel 1 along the circumferential direction, and crushing teeth (not shown in the figure) are arranged on the surface of the crushing plate 12. The bottom of the crushing tray 6 is provided with teeth along the circumferential direction. The driving part comprises a driving motor 11 and a gear transmission mechanism 13 connected with an output shaft of the driving motor 11, and the gear transmission mechanism 13 is meshed with teeth on the crushing tower tray 6 to drive the crushing tower tray 6 to rotate. The rotation of the crushing tray 6 drives the material located in the cooling discharge belt 103 in motion and the material located in the cooling discharge belt 103 can be crushed by the interaction between the crushing tray 6 and the annular crushing plate 12. In order to increase the strength of the annular crushing plate 12, the crushing plate 12 is preferably a cast part.

The second air channel 7 penetrates through the crushing tray 6 and is communicated with the interior of the cylinder 1, and air in the second air channel 7 forms a counter flow from bottom to top through the second air channel 7. Specifically, the crushing tray 6 may be provided with a hollow structure, the upper surface of the crushing tray 6 is further provided with a plurality of through holes, the plurality of through holes are communicated with the second air channel 7, and air in the second air channel 7 enters the cylinder 1 through the through holes.

The working principle of the countercurrent vertical sintering furnace is as follows: the sludge raw material after drying treatment, coal powder and other raw materials are uniformly mixed together, the mixture is molded by molding equipment and has a certain particle diameter, the mixture is fed from a feeding port 3 of a top cover 2 at a uniform speed by a feeding device, a top preheating zone 101 is arranged on the top, molded material particles are fed into a barrel 1 through the feeding port 3 and are heated by hot air flow from bottom to top, moisture in the particles is evaporated to become dry materials, the temperature is continuously increased, volatile matters in coal powder fuel in the material particles continuously escape and are discharged out of the barrel 4 along with waste gas, and the particles shrink and sink to a calcining sintering zone 102 due to the evaporation of moisture and the escape of the volatile matters.

The materials are settled to the calcining sintering zone 102, the coal powder is continuously combusted, the temperature is further increased to about 1000 ℃, a large amount of coal powder in the material particles is combusted, a part of the coal powder presents a preliminary softening reaction of a liquid phase, and the copper element in the materials starts to be reduced, so that good raw material supply is provided for the next smelting work.

The material is reduced and calcined and then settled to a cooling discharge belt 103, the high-temperature reduced material is rapidly cooled by cold air blown from a second air channel 7 at the lower part, the reduction effect of elements is ensured, meanwhile, the cooled hot air continuously rises to supply oxygen for calcination introduced into a first air channel 5 in the calcining sintering belt 103, the high-temperature hot waste gas continuously rises to a top preheating belt 101 for drying the raw material, the air forms a reverse flow from bottom to top and is fully utilized, the sintered material at the bottom is cooled to form a blocky structure with certain strength, and the blocky material is crushed into small sintered materials through the interaction of a crushing tray 6 of the discharge belt 103 and an annular crushing plate 12 and is discharged through a discharge opening 14 at the bottom.

The utility model provides a vertical fritting furnace against current is provided with first air duct 5 and second air duct 7 respectively through both sides and the bottom at the barrel, and the air is followed the combustion for the buggy provides combustion air in first air duct 5 and the 7 drum of second air duct are gone into barrel 1, follow simultaneously the air that gets into in the second air duct 7 forms against the current from bottom to top, crosses each other with vertical fritting furnace top-down's material and accomplishes the sintering, makes full use of the hot material that produces among the sintering process, has reduced the energy consumption, has still thoroughly solved the inhomogeneous phenomenon of ventilation in the barrel simultaneously, has improved the firing efficiency of grog, reaches reinforced, burns into, unloads the triple balance, and output, quality increase substantially. Compared with the prior high-temperature smelting process which needs to pass through a rotary dryer and a brick making process, the utility model discloses a countercurrent vertical sintering furnace directly carries out high-temperature smelting, and the total treatment cost is reduced by about 30-40%.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A reverse flow vertical sintering furnace comprising:

the driving part comprises a driving motor and a gear transmission mechanism connected with an output shaft of the driving motor, and the gear transmission mechanism is in meshing transmission with teeth on the crushing tower tray.

2. The reverse flow vertical sintering furnace according to claim 1, wherein the first air passage is provided in plurality, and the plurality of first air passages are at an angle of 5 ° to 8 ° with respect to a horizontal plane.

3. The reverse flow vertical sintering furnace according to claim 2, wherein the first air passages are provided in two, and the two first air passages are symmetrically provided on both sides of the calcined sintering belt.

4. The reverse flow vertical sintering furnace according to claim 1, wherein the chimney is provided in plurality.

5. The reverse flow vertical sintering furnace of claim 1, wherein the crushing tray is provided in a hollow structure, and the upper surface of the crushing tray is further provided with a plurality of through holes, and the plurality of through holes are communicated with the second air channel.

6. The reverse flow vertical sintering furnace of claim 1 wherein the crushing plate is a casting and the crushing plate has crushing teeth disposed on a surface thereof.