CN203518629U - Preheating device for continuously drying mineral aggregates through smoke waste heat - Google Patents

Abstract

The utility model relates to a preheating device for continuously drying ore material by utilizing the waste heat of flue gas, which belongs to the technical field of metallurgical equipment. The preheating device for continuously drying mineral material by using the residual heat of flue gas includes a mineral material drying chamber, a porous vertical pipe, a horizontal air distribution pipe, an air intake pipe and a mine hopper. The cavity is a cylinder, and the inside of the cylinder is provided with a plurality of porous vertical pipes along the column wall to form at least two circles of flue gas drying pipes. Install the intake pipe horizontally on the horizontal air distribution pipe. The utility model uses the waste heat of the flue gas to dry the mineral material, which not only can dry the mineral material, but also does not generate new pollution, has high utilization rate of heat energy, and is energy-saving and environment-friendly.

Description

A preheating device for continuous drying of ore material using waste heat of flue gas

technical field

The utility model relates to a preheating device for continuously drying ore material by utilizing the residual heat of flue gas, which belongs to the technical field of metallurgical equipment.

Background technique

Due to the special process and equipment of pyrometallurgy, it is often necessary to remove the moisture in the raw ore. At present, factories generally use rotary kilns, dryers, dryers and other equipment to complete the dehydration process. These equipment consume a large amount of fossil fuels such as coal, natural gas, heavy oil or diesel oil during use, which not only increases production costs, but also increases production costs. produce environmental pollutants. Pyrometallurgical processes usually produce a large amount of dusty flue gas with a temperature higher than 150°C. Direct discharge will cause energy loss and pollute the environment. Flue gas waste heat recovery will bring huge economic and environmental benefits.

Patent No. ZL201120273146.5 discloses a "furnace material drying and preheating device", which is composed of a box body, a bracket, an air intake main pipe, an air intake branch pipe group, and several layers of drying pipe layers. Each layer The drying pipe layer is composed of several drying pipes arranged parallel to the horizontal plane. Although it can dry and preheat the charge, the hole above the drying pipe is easily blocked by the charge, and the horizontal arrangement of the drying pipe will hinder the charge from descending, causing the charge to agglomerate, affecting the drying efficiency and results.

Contents of the invention

Aiming at the problems and deficiencies of the above-mentioned prior art, the utility model provides a preheating device for continuously drying ore materials by utilizing the residual heat of flue gas. The utility model uses the residual heat of the flue gas to dry the mineral material, which not only can dry the mineral material, but also does not generate new pollution, has high heat energy utilization rate, energy saving and environmental protection, and the utility model is realized through the following technical scheme.

A preheating device for continuously drying mineral material by utilizing waste heat of flue gas, comprising a mineral material drying chamber, a porous vertical pipe, a horizontal air distribution pipe, an air inlet pipe and a mine hopper 6, and the mineral material drying chamber is installed on the upper end of the mine hopper 6, The mineral material drying chamber is a cylinder, and a plurality of porous vertical pipes are arranged along the column wall inside the cylinder to form at least two circles of flue gas drying pipes. The bottom of the porous vertical pipes is sealed by a horizontal air distribution pipe and the gap between the porous vertical pipe and the horizontal air distribution pipe The pipes are connected, and the air intake pipe is installed horizontally on the horizontal air distribution pipe. The number of turns of the flue gas drying pipe can be determined according to the actual situation, the number of porous vertical pipes can be calculated and designed according to the temperature and volume of the flue gas entering the device, and the number of intake pipes can be determined according to the horizontal gas distribution pipe.

The horizontal air distribution pipe is a circular pipe.

The air intake pipe is provided with a flue gas inlet.

A pipe support 3 is provided on the porous standpipe.

The porous standpipe of the outer ring is shorter than the porous standpipe of the adjacent secondary ring, so as to facilitate the distribution of air through the horizontal air distribution pipe.

The flue gas used in the above-mentioned pipeline is a high-temperature gas generated in the metallurgical process, and the temperature is generally 150-700°C.

After the mineral material is dried by the preheating device, the temperature of the mineral material coming out from the dry mineral material outlet 7 is 120°C-400°C.

The method of using the preheating device for continuously drying mineral materials by using the waste heat of flue gas is as follows: the flue gas is passed into the air intake pipe from the flue gas inlet, enters the horizontal air distribution pipe from the air intake pipe, and then enters the air distribution pipe from the horizontal air distribution pipe. In the porous vertical pipe, the mineral material is added from the continuous feeding port of the mineral material at the same time, and the mineral material is dried by the flue gas in the porous vertical pipe or the flue gas overflowing from the holes of the porous vertical pipe during the descending process, and the water vapor generated from the water The steam outlet is discharged, and the dried mineral material comes out from the dry mineral material outlet 7 of the ore hopper 6 .

The beneficial effects of the utility model are: (1) The porous vertical flue gas pipes are inserted into the inside of the mineral material for heating, so that the mineral material can be heated evenly and the heat energy utilization rate is high; (2) The flue gas used comes from the metallurgical process. High-temperature gas and dust in the flue gas can be absorbed by mineral materials, which will not produce new pollution, but also save energy and low cost, and play a role in energy saving and emission reduction; (3) Mineral materials can be added continuously, and the working efficiency high.

Description of drawings

Fig. 1 is a schematic diagram of a longitudinal section of the utility model;

Fig. 2 is a schematic cross-sectional structure diagram of the utility model.

In the figure: 1-porous vertical pipe in the outer ring, 2-horizontal air distribution pipe in the outer ring, 3-pipe support, 4-horizontal air distribution pipe in the inner ring, 5-porous vertical pipe in the inner ring, 6-mine bucket, 7-dry mineral material Outlet, 8-outer ring air intake pipe, 9-inner ring air intake pipe, A-mineral material continuous feeding port, B-water vapor outlet, C-outer ring smoke inlet, D-inner smoke gas inlet.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

Example 1

As shown in Figures 1 to 2, the preheating device for continuously drying mineral material by using the waste heat of flue gas includes a mineral material drying chamber, porous vertical pipes (outer ring porous vertical pipe 1 and inner ring porous vertical pipe 5), horizontal distribution Air pipe (outer ring horizontal air distribution pipe 2 and inner ring horizontal air distribution pipe 4), air intake pipe (outer ring air intake pipe 8 and inner ring air intake pipe 9) and mine hopper 6, and the upper end of the mine hopper 6 is installed with a mineral material drying Chamber, the mineral material drying chamber is a cylinder, and the interior of the cylinder is provided with a plurality of porous vertical pipes (outer ring porous vertical pipe 1 and inner ring porous vertical pipe 5) to form at least two circles of flue gas drying pipes. The bottom of the pipe is sealed by the horizontal air distribution pipe (the bottom of the porous vertical pipe 1 in the outer ring is sealed by the horizontal air distribution pipe 2 in the outer ring, the bottom of the porous vertical pipe 5 in the inner ring is sealed by the horizontal air distribution pipe 4 in the inner ring), and the gap between the porous vertical pipe and the horizontal air distribution pipe The pipes are connected (the outer ring porous vertical pipe 1 is connected to the outer ring horizontal air distribution pipe 2, the inner ring porous vertical pipe 5 is connected to the inner ring horizontal air distribution pipe 4), and the horizontal air distribution pipe is horizontally installed with the intake pipe (the outer ring horizontal air distribution pipe 2 The outer ring air intake pipe 8 is installed horizontally on the top, and the inner ring air intake pipe 9 is horizontally installed on the inner ring horizontal air distribution pipe 4).

The horizontal gas distribution pipe is a circular pipe, and the air intake pipe is provided with a smoke inlet (the outer ring air intake pipe 8 is provided with a smoke inlet C, and the inner ring air intake pipe 9 is provided with a smoke inlet D); the porous vertical pipe (outer The porous standpipe 1 of the ring and the porous standpipe 5 of the inner ring) are provided with a pipe support 3; the porous standpipe of the outer ring is shorter than the porous standpipe of the adjacent secondary ring (the porous standpipe 1 of the outer ring is shorter than the porous standpipe 5 of the inner ring) short), in order to facilitate the horizontal air distribution pipe distribution.

The method of using the preheating device for continuously drying mineral materials by using the residual heat of flue gas is as follows: the flue gas is respectively passed from the flue gas inlet (flue gas inlet C and flue gas inlet D) into the intake pipe (outer ring intake pipe 8 and inner ring air intake pipe 9), enter the horizontal air distribution pipe (outer ring horizontal air distribution pipe 2 and inner ring horizontal air distribution pipe 4) from the air intake pipe (outer ring air intake pipe 8 and inner ring air intake pipe 9) respectively, Then enter the porous vertical pipe (outer ring porous vertical pipe 1 and inner ring porous vertical pipe 5) from the horizontal air distribution pipe (horizontal air distribution pipe 2 in the outer ring and horizontal air distribution pipe 4 in the inner ring) respectively, and continuously add mineral materials Port A adds mineral material, and the mineral material passes through the flue gas in the porous vertical pipe (outer ring porous vertical pipe 1 and inner ring porous vertical pipe 5) or from the porous vertical pipe (outer ring porous vertical pipe 1 and inner ring The flue gas overflowing in the holes of the porous standpipe 5) is dried, and the generated water vapor is discharged from the water vapor outlet B, and the dried mineral material is discharged from the dry mineral material outlet 7 of the ore hopper 6.

Example 2

The preheating device for continuously drying mineral material by using the waste heat of flue gas includes a mineral material drying chamber, a porous vertical pipe, a horizontal air distribution pipe, an air inlet pipe and a mine hopper 6, and the mineral material drying chamber is installed on the upper end of the mine hopper 6, and the ore The material drying chamber is a cylinder, and the interior of the cylinder is equipped with multiple porous vertical pipes along the column wall to form three circles of flue gas drying pipes. The bottom of the porous vertical pipes is sealed by a horizontal air distribution pipe, and the pipes between the porous vertical pipes and the horizontal air distribution pipes are connected. , Install the intake pipe horizontally on the horizontal air distribution pipe.

Among them, the horizontal air distribution pipe is a circular pipe; the air intake pipe is provided with a flue gas inlet; the porous vertical pipe is provided with a pipe support 3; the porous vertical pipe of the outer ring is shorter than the porous vertical pipe of the adjacent secondary ring to facilitate the horizontal air distribution pipe Distribute gas.

Example 3

The preheating device for continuously drying mineral material by using the waste heat of flue gas includes a mineral material drying chamber, a porous vertical pipe, a horizontal air distribution pipe, an air inlet pipe and a mine hopper 6, and the mineral material drying chamber is installed on the upper end of the mine hopper 6, and the ore The material drying chamber is a cylinder, and the interior of the cylinder is equipped with a plurality of porous vertical pipes along the column wall to form at least two circles of flue gas drying pipes. In the same way, the air intake pipe is installed horizontally on the horizontal air distribution pipe. The number of turns of the flue gas drying pipe can be determined according to the actual situation, the number of porous vertical pipes can be calculated and designed according to the temperature and volume of the flue gas entering the device, and the number of intake pipes can be determined according to the horizontal gas distribution pipe.

Among them, the horizontal air distribution pipe is a circular pipe; the air intake pipe is provided with a flue gas inlet; the porous vertical pipe is provided with a pipe support 3; the porous vertical pipe of the outer ring is shorter than the porous vertical pipe of the adjacent secondary ring to facilitate the horizontal air distribution pipe Distribute gas.

Claims (5)

1. a preheating device that utilizes fume afterheat continuous drying mineral aggregate, it is characterized in that: comprise mineral aggregate drying chamber, porous vertical tube, horizontal gas distribution pipe, admission line and ore bucket (6), mineral aggregate drying chamber is installed in described ore bucket (6) upper end, mineral aggregate drying chamber is cylinder, column body is provided with many porous vertical tubes along post jamb and forms at least two circle flue gas drying pipelines, porous vertical tube bottom by horizontal gas distribution pipe, seal and porous vertical tube and horizontal gas distribution pipe between pipeline communicate, on horizontal gas distribution pipe, level is installed into feed channel.

2. the preheating device that utilizes fume afterheat continuous drying mineral aggregate according to claim 1, is characterized in that: described horizontal gas distribution pipe is circular pipe.

3. the preheating device that utilizes fume afterheat continuous drying mineral aggregate according to claim 1, is characterized in that: described admission line is provided with smoke inlet.

4. the preheating device that utilizes fume afterheat continuous drying mineral aggregate according to claim 1, is characterized in that: described porous vertical tube is provided with pipeline support (3).

5. according to the preheating device that utilizes fume afterheat continuous drying mineral aggregate described in claim 1 or 4, it is characterized in that: the porous vertical tube of described outer ring is shorter than the porous vertical tube of adjacent circle.

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