CN217569007U

CN217569007U - High-tightness continuous feeding device for materials

Info

Publication number: CN217569007U
Application number: CN202221077706.4U
Authority: CN
Inventors: 罗鹏; 魏国玺; 刘建生; 罗栋; 蓝兴权; 李小春; 李陟; 蒋欢; 卜艳忠
Original assignee: Yixing Tianshan Cement Co Ltd
Current assignee: Yixing Tianshan Cement Co Ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-10-14
Anticipated expiration: 2032-05-07

Abstract

The utility model provides a high-tightness continuous feeding device for materials, which comprises a barrel fixed by a frame, wherein a sealed cavity is arranged in the barrel, the bottom of the sealed circular conveying cavity is a discharge hole, the middle part of the sealed circular conveying cavity is a vertical rotor assembly distributed with rotating blades, and the top of the sealed circular conveying cavity is connected with a feeding hole through belt transmission equipment; the inner wall of the seal cavity is provided with a hot air heating interlayer, an air inlet of the hot air heating interlayer is arranged inside the mill, and an outlet of the hot air heating interlayer is connected with a waste gas air pipe at the outlet of the mill. The utility model discloses a vertical seal chamber heats the interior casing of feed through extracting high temperature hot-blast in the bistrique hot-air pipes, effectively prevents batcher rotation work in-process, and interior cavity shell dewfall wall built-up produces the material and blocks up, influences production, thoroughly solves bistrique air leakage, batcher jam scheduling problem among the raw material grinding system.

Description

High-tightness continuous feeding device for materials

Technical Field

The utility model relates to a cement manufacture line field specifically is a continuous feeding device of high leakproofness of material.

Background

The important link in cement production is two-grinding and one-burning. The secondary grinding refers to raw material grinding and cement grinding, and the traditional method is a ball mill, so that the energy consumption is large. In the production process, the influences of material water content and the like, the negative pressure environment of a grinding head of the grinding machine is constantly changed, the feeding and the discharging of the grinding machine are controlled by negative pressure, the negative pressure at the inlet and the outlet of the grinding machine is simply stabilized, normal production is achieved, and the flow rate of materials in the grinding machine is effectively controlled. And the negative pressure variation amplitude can reach 100% sometimes because of the air leakage problem of the grinding head feeding device. In a raw material grinding system, air leakage of a grinding head becomes a problem which is urgently needed to be solved at present, and no matter how much air leaks into the raw material grinding system, the air can be mixed with waste gas required by normal ventilation. This mixed-in cold air is finally also discharged from the mill outlet. When the raw material enters the mill, air cannot leak, because the finished product is separated from the extracted powder, a dust collector is needed for separating air in the powder, and once the air leaks, the negative pressure field of the original system can be damaged. The obvious reason is that the more air is mixed (pumped in), the more obvious the negative pressure is reduced, and as a result, the insufficient pumping force is generated, a part of powder can be retained in the mill, the more serious the dust pollution generated when the powder and the air are separated, and the load of the dust collector needs to be increased. The ball packing phenomenon caused by excessive fine powder remained in the mill destroys the grinding capability of the mill, reduces the yield and increases the power consumption. When the water content of the materials to be ground is increased, a part of the materials are attached to a feeding port of the grinding machine to cause blockage, ventilation in the grinding machine is poor, negative pressure at an inlet and an outlet of the grinding machine is greatly changed, full grinding is generated, and normal production cannot be performed in serious cases.

The principle of the existing cement raw material mill is that a double-flap valve and a grinding head feeding air lock are used in most cement raw material mill production, materials can fall smoothly by utilizing a fixed gap between a steel plate and a shell, and meanwhile, the materials can be filled in the gap to achieve a certain sealing effect. The process is used in foreign production lines without problems because the foreign production lines have strict control on the raw materials, namely the particle sizes (the sizes of the particle sizes) of the raw materials are consistent and uniform. As long as the proper 'gap' of the equipment is selected, the blanking and the sealing can be ensured at the same time. The above refers to cement production lines in developed countries, while in domestic and underdeveloped countries, materials are not uniform, and the particle size difference of materials sometimes is tens of times or hundreds of times, that is, the particle size of raw materials is between 1mm and 200mm (brick size), so that the raw materials are difficult to stabilize equipment 'gaps' in production and use, and the non-uniform particle raw materials are difficult to achieve air tightness (complete sealing), thereby causing the air leakage problem of the key process link in the production process.

Aiming at solving the problem that a mill system works under the negative pressure condition in the production process, and realizing the integrated work of crushing, grinding, drying, powder selection and the like, wherein the change of air flow is the most critical and directly influences the fineness and the yield of the final finished product. Therefore, how to keep the internal pressure of the mill stable is an important research subject. The channel for the mill to communicate with the outside is the feed inlet and the discharge outlet, and the feed inlet is the most likely position for leakage under the condition that the internal air pressure is negative. To solve this problem, it puts high sealing requirements on the feed inlet of the mill. Because the shape of the mill is large, if the vibration is not well treated, the normal operation of the mill is greatly influenced, and therefore, the materials are required to continuously and uniformly enter the inside of the mill. Aiming at the defects of easy filling, easy blocking, large gap, large air leakage and the like in the use process of the existing raw material grinding and feeding equipment, the novel air locking and feeding device for the mill is developed by combining years of practical experience of a company in the application aspect of rotary feeding equipment. The device has smooth blanking without material blockage, excellent air locking effect, obvious energy saving and consumption reducing effect, stability and reliability, and is an optimized and improved preferred mode of a vertical mill feeding mode.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem of current bistrique sealing technique, provide a continuous feeding device of high leakproofness of material, adopt vertical seal chamber, heat through extracting interior high-temperature hot-blast to the interior casing of feed of bistrique hot-air pipes, effectively prevent the batcher from rotating the course of the work, interior casing dewfall wall built-up production material and block up, influence production, bistrique air leakage, batcher jam scheduling problem among the thoroughly solution raw grinding system.

The utility model comprises a barrel fixed by a frame, a sealed cavity is arranged in the barrel, the bottom of the sealed cavity is a discharge hole, the middle part is a vertical rotor assembly distributed with rotating blades, and the top is connected with a feeding hole by a belt transmission device; the inner wall of the seal cavity is provided with a hot air heating interlayer, an air inlet of the hot air heating interlayer is arranged inside the mill, and an outlet of the hot air heating interlayer is connected with a waste gas air pipe at the outlet of the mill. The hot air heating interlayer utilizes the high-temperature hot airflow pressure of the grinding head to form strong convection through the high pressure difference of the inlet and the outlet of the raw material grinding machine so as to ensure that hot air fully heats the inner wall of the small bin and automatically flows to effectively prevent blockage. The included angle between the outlet of the hot air heating interlayer and the mill outlet waste gas air pipe is more than 37 degrees.

Further improved, the belt transmission equipment is connected with a weighing unit and a speed measuring device.

The utility model has the advantages that:

1. high-temperature hot air of the grinding head is extracted from the feeding cavity, the high-temperature hot air flows through the high pressure difference between the outlet and the inlet of the mill and is discharged to the waste gas air pipe at the outlet of the mill through a pipeline, the hot air is used for heating the shell, an exhaust fan does not need to be additionally arranged, and no power consumption is realized.

2. The material level weighing bin is filled with the material through the discharging chute, a stable material level is established in the weighing bin through the control unit, and air locking is carried out through the stable material level. The material level control is to detect the amount of the material in the weighing bin through the weighing sensor, control the running speed of the feeder, stabilize the material level within a set range, avoid overflow of the material and avoid air leakage of an empty bin.

3. Because the rotor of the dense air feeder is vertically assembled, the extrusion of a V-shaped compartment of a horizontal airlock valve to materials is eliminated, and the materials fall into the bottom of the rotor in an original loose state and are taken away by the rotating rotor to enter a mill. The unique rectification anti-blocking device is designed in the feeder, so that the phenomenon of material blocking after the material enters the rotor is eliminated. The upper and lower wear surfaces of the rotor and the bottom cover are made of wear-resistant materials. The equipment has smooth incoming materials, no adhesion, excellent sealing, high efficiency, wear resistance and long service life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a cylinder, 2, a bar valve, 3, a feeding port, 4, a motor reducer, 5, a speed measuring device, 6, a rotor assembly, 7, a frame, 8, a discharging port and 9, a weighing unit.

Detailed Description

The utility model discloses the structure is as shown in figure 1, include through frame 7 fixed barrel 1, be provided with seal chamber in the barrel 1, sealed circular transport cavity bottom is discharge gate 8, and the middle part is for distributing there is rotating vane's vertical rotor assembly 6, and the top is passed through belt transmission equipment and is linked to each other with pan feeding mouth 3, and the pan feeding mouth is provided with stick valve 2.

The inner wall of the seal cavity is provided with a hot air heating interlayer, an air inlet of the hot air heating interlayer is arranged inside the mill, and an outlet of the hot air heating interlayer is connected with a waste gas air pipe at the outlet of the mill. The hot air heating interlayer utilizes the high-temperature hot airflow pressure of the grinding head to form strong convection through the high pressure difference of the inlet and the outlet of the raw material grinding machine so as to ensure that hot air fully heats the inner wall of the small bin and automatically flows to effectively prevent blockage.

Further improved, the belt transmission equipment is connected with a weighing unit 9 and a speed measuring device 5, and a motor reducer 4 controls the transmission speed of the belt transmission equipment.

Further improved, the included angle between the outlet of the hot air heating interlayer and the waste gas air pipe at the outlet of the mill is larger than 37 degrees.

The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.

Claims

1. The utility model provides a high leakproofness continuous feeding device of material which characterized in that: the device comprises a barrel fixed through a rack, wherein a sealed cavity is arranged in the barrel, the bottom of the sealed cavity is a discharge hole, the middle part of the sealed cavity is a vertical rotor assembly distributed with rotating blades, and the top of the sealed cavity is connected with a feed inlet through belt transmission equipment; the inner wall of the sealed cavity is provided with a hot air heating interlayer, an air inlet of the hot air heating interlayer is arranged in the mill, and an outlet of the hot air heating interlayer is connected with a waste gas air pipe at the outlet of the mill; the included angle between the outlet of the hot air heating interlayer and the mill outlet waste gas air pipe is more than 37 degrees.

2. The continuous feeding device with high material tightness as claimed in claim 1, characterized in that: the belt transmission equipment is connected with a weighing unit and a speed measuring device.