阅读说明：本技术 一种活性炭生产用木屑烘干防自燃系统 (Wood chip drying spontaneous combustion preventing system for activated carbon production ) 是由 程振国 于 2019-12-20 设计创作，主要内容包括：本发明涉及一种活性炭生产用木屑烘干防自燃系统,包括进料系统、干燥系统、料仓和收尘系统；所述料仓的前端通过管道连接进料系统和干燥系统,料仓的后端通过管道连接收尘系统；所述干燥系统包括通过管道顺次连接的热风炉、脉冲管道和强化干燥器；热风炉安装有风量调节阀,热风炉与脉冲管道之间的管道上安装进料系统；所述进料系统包括皮带机、圆筒筛和进料绞龙；所述收尘系统包括顺次连接的旋风分离器、布袋除尘器和引风机,所述旋风分离器安装于料仓的顶部,旋风分离器的顶部分别通过管道与强化干燥器以及布袋除尘器连接；所述布袋除尘器与旋风分离器之间的管道上安装温度传感器；所述温度传感器与皮带机的电机以及风量调节阀门连接。(The invention relates to a wood chip drying spontaneous combustion prevention system for activated carbon production, which comprises a feeding system, a drying system, a storage bin and a dust collecting system, wherein the feeding system is used for feeding wood chips; the front end of the bin is connected with the feeding system and the drying system through pipelines, and the rear end of the bin is connected with the dust collecting system through a pipeline; the drying system comprises a hot blast stove, a pulse pipeline and an intensified dryer which are sequentially connected through pipelines; the hot blast stove is provided with an air volume regulating valve, and a feeding system is arranged on a pipeline between the hot blast stove and the pulse pipeline; the feeding system comprises a belt conveyor, a cylindrical screen and a feeding auger; the dust collecting system comprises a cyclone separator, a bag-type dust collector and a draught fan which are connected in sequence, the cyclone separator is arranged at the top of the storage bin, and the top of the cyclone separator is connected with the intensified dryer and the bag-type dust collector through pipelines respectively; a temperature sensor is arranged on a pipeline between the bag-type dust collector and the cyclone separator; and the temperature sensor is connected with a motor and an air volume adjusting valve of the belt conveyor.)

1. A sawdust drying and spontaneous combustion preventing system for activated carbon production is characterized by comprising a feeding system, a drying system, a storage bin and a dust collecting system; the front end of the bin is connected with the feeding system and the drying system through pipelines, and the rear end of the bin is connected with the dust collecting system through a pipeline; the drying system comprises a hot blast stove, a pulse pipeline and an intensified dryer which are sequentially connected through pipelines; the hot blast stove is provided with an air volume regulating valve, and a feeding system is arranged on a pipeline between the hot blast stove and the pulse pipeline; the feeding system comprises a belt conveyor, a cylindrical screen and a feeding auger; the feeding auger is arranged at a pipeline feeding port above the hot blast stove; a cylindrical screen is arranged above the feeding auger and supplies materials through a belt conveyor; the dust collecting system comprises a cyclone separator, a bag-type dust collector and a draught fan which are connected in sequence, the cyclone separator is arranged at the top of the storage bin, and the top of the cyclone separator is connected with the intensified dryer and the bag-type dust collector through pipelines respectively; a temperature sensor is arranged on a pipeline between the bag-type dust collector and the cyclone separator; and the temperature sensor is connected with a motor and an air volume adjusting valve of the belt conveyor.

2. The wood chip drying and spontaneous combustion preventing system for activated carbon production according to claim 1, wherein the air volume adjusting valve consists of a valve and a driving motor.

3. The wood chip drying and spontaneous combustion preventing system for activated carbon production according to claim 1, wherein at least two cyclone separators are provided.

4. The wood chip drying and spontaneous combustion preventing system for activated carbon production according to claim 1, wherein a valve is arranged at the connection of the cyclone separator and the storage bin.

5. The wood chip drying and spontaneous combustion preventing system for activated carbon production according to claim 1, wherein an online sand removing device is arranged at the bottom of the intensified dryer.

6. The wood chip drying and spontaneous combustion preventing system for activated carbon production according to claim 1, wherein the driving motor of the air volume adjusting valve and the motor of the belt conveyor are control motors.

Technical Field

The invention relates to the technical field of front-end processing of sawdust raw materials in activated carbon production, in particular to a sawdust drying and spontaneous combustion preventing system for activated carbon production.

Background

The activated carbon is a high-quality functional carbon adsorption material, has the advantages of acid resistance, alkali resistance, heat resistance, easy regeneration and the like, has a highly developed pore structure and unique surface functional groups, can selectively adsorb substances in gas phase and liquid phase through physical adsorption or chemical adsorption, and is widely applied to the fields of medicine, chemical industry, food, military, aerospace science and technology, environmental protection and the like.

A large number of wood processing enterprises can generate a large number of forestry 'three residues' such as wood chips, veneers and the like in the wood processing process, and the wood 'three residues', particularly the biological characteristics of the wood chips, are used for preparing the powdery active carbon which is used as an adsorption material, thereby saving resources and being beneficial to environmental protection.

The pneumatic drying system has the advantages of simple equipment, high drying strength, short drying time, high thermal efficiency and the like, and is often used in the wood chip drying section in the production process of the activated carbon. However, due to the factors of the dryness and the humidity of the sawdust, unstable heat provided by the hot blast stove and the like, the temperature of the sawdust in the hot blast stove greatly fluctuates, the spontaneous combustion phenomenon easily occurs, and the spontaneous combustion sawdust enters the pulse bag packaging device to cause the spontaneous combustion of the cloth bag.

Disclosure of Invention

The invention aims to provide a wood chip drying and spontaneous combustion preventing system for activated carbon production.

The technical scheme adopted by the invention is as follows: a sawdust drying and spontaneous combustion preventing system for activated carbon production comprises a feeding system, a drying system, a storage bin and a dust collecting system; the front end of the bin is connected with the feeding system and the drying system through pipelines, and the rear end of the bin is connected with the dust collecting system through a pipeline; the drying system comprises a hot blast stove, a pulse pipeline and an intensified dryer which are sequentially connected through pipelines; the hot blast stove is provided with an air volume regulating valve, and a feeding system is arranged on a pipeline between the hot blast stove and the pulse pipeline; the feeding system comprises a belt conveyor, a cylindrical screen and a feeding auger; the feeding auger is arranged at a pipeline feeding port above the hot blast stove; a cylindrical screen is arranged above the feeding auger and supplies materials through a belt conveyor; the dust collecting system comprises a cyclone separator, a bag-type dust collector and a draught fan which are connected in sequence, the cyclone separator is arranged at the top of the storage bin, and the top of the cyclone separator is connected with the intensified dryer and the bag-type dust collector through pipelines respectively; a temperature sensor is arranged on a pipeline between the bag-type dust collector and the cyclone separator; and the temperature sensor is connected with a motor and an air volume adjusting valve of the belt conveyor.

The air quantity regulating valve consists of a valve and a driving motor.

At least two cyclone separators are arranged.

And a valve is arranged at the joint of the cyclone separator and the storage bin.

And an online sand and stone removing device is arranged at the bottom of the intensified dryer.

And the driving motor of the air volume adjusting valve and the motor of the belt conveyor are control motors.

The invention has the beneficial effects that: the temperature controller controls the temperature of the feeding and hot blast stove, so that the phenomenon that the sawdust enters the pulse bag packaging device to cause bag spontaneous combustion due to overlarge temperature fluctuation in the hot blast stove is prevented.

Drawings

The following detailed description of embodiments of the invention refers to the accompanying drawings.

FIG. 1 is a schematic flow diagram of a wood chip drying and spontaneous combustion preventing system for activated carbon production according to the present invention.

Detailed Description

As shown in figure 1, the wood chip drying spontaneous combustion prevention system for activated carbon production comprises a feeding system, a drying system, a storage bin and a dust collecting system; the front end of the bin 10 is connected with a feeding system and a drying system through a pipeline 13, and the rear end of the bin 10 is connected with a dust collecting system through a pipeline 13; the drying system comprises a hot blast stove 5, a pulse pipeline 4 and an intensified dryer 6 which are sequentially connected through a pipeline 13; an air volume regulating valve is arranged on the hot blast stove 5, and a feeding system is arranged on a pipeline 13 between the hot blast stove 5 and the pulse pipeline 4; the feeding system comprises a belt conveyor 1, a cylindrical screen 2 and a feeding auger 3; the feeding auger 3 is arranged at a pipeline feeding port above the hot blast stove 5; a cylindrical screen 2 is arranged above the feeding auger 3, and the cylindrical screen 2 feeds materials through a belt conveyor 1; the dust collecting system comprises a cyclone separator 7, a bag-type dust collector 8 and an induced draft fan 9 which are connected in sequence, wherein the cyclone separator 7 is arranged at the top of a storage bin 10, and the top of the cyclone separator 7 is respectively connected with a strengthening dryer 6 and the bag-type dust collector 8 through pipelines 13; a temperature sensor 12 is arranged on a pipeline between the bag-type dust collector 8 and the cyclone separator 7; and the temperature sensor 12 is connected with a motor and an air volume adjusting valve of the belt conveyor.

The air quantity regulating valve 11 is composed of a valve and a driving motor.

At least two cyclones 7 are provided.

A valve is arranged at the connection part of the cyclone separator 7 and the storage bin 10.

The bottom of the intensified dryer 6 is provided with an online sand and stone removing device 6-1.

And the driving motor of the air volume adjusting valve and the motor of the belt conveyor 1 are control motors.

When the device is used, the wood chip raw material for producing the active carbon with the water content of 40-60% enters the cylindrical screen 2 through the belt conveyor 1, impurities such as barks and the like are removed primarily, and undersize materials enter the drying system through the feeding auger 3. The sawdust and hot air provided by a hot-blast stove 5 are subjected to heat transfer and mass transfer processes in a drying system consisting of a pulse pipeline 4 and a strengthening dryer 6, the dried sawdust has the water content of 10-15 percent, enters a storage bin 10 through a cyclone separator 7 for later use, fine-particle sawdust is collected by a pulse bag-type dust collector 8, and a draught fan 10 provides power for the whole system.

When the temperature measuring system 12 at the front end of the pulse dust collector is abnormal, the air volume adjusting device 11 and the belt conveyor 1 are formed by the valve and the electric driving mechanism to start to act, so that the system tends to be stable, specifically, when the temperature of the temperature measuring system 12 at the front end of the pulse dust collector is too high, the feeding speed of the belt conveyor 1 is accelerated, the air volume adjusting device 11 is opened to enter some cold air, when the temperature is normal, the air volume adjusting device 11 is closed, and the speed of the belt conveyor 1 is recovered to be normal.

By adopting the technical scheme, the problem of wood chip spontaneous combustion in a wood chip drying section in activated carbon production is solved, and the problem of bag burning of a pulse cloth bag is effectively avoided; and the moisture content in the dried sawdust can be strictly controlled, so that the quality of the finished product produced by the activated carbon is more stable, and the economic and social benefits are improved.