CN206276482U - A kind of raw material vertical-grinding system - Google Patents

Abstract

The utility model relates to the field of cement production, in particular to a raw material vertical mill system, comprising a drying and grinding system, a raw material batching conveying system and a raw material batching system including a batching warehouse; the drying and grinding system includes a grinding Equipment, hot air supply system and material collection equipment, characterized in that the batching warehouse includes a wet calcium carbide slag storage warehouse and a dry calcium carbide slag storage warehouse, and the wet calcium carbide slag storage The slag is transported to the drying and grinding system; the system for drying carbide slag also includes a pneumatic conveying system for transporting the dry carbide slag collected by the material collection equipment to the dry carbide slag storage. The utility model adds a pneumatic conveying system to the original raw material vertical mill system, which can realize the process of drying calcium carbide slag alone, does not need to establish independent drying equipment, and can reduce investment and operation cost.

Description

A raw material vertical mill system

technical field

The utility model relates to the technical field of cement production technology, in particular to a raw meal vertical mill system.

Background technique

Carbide slag is the industrial waste produced by the acetylene process to produce polyvinyl chloride resin or acetylene gas plant in the coal chemical industry. Because the discharge of calcium carbide slag not only causes resource waste and environmental pollution, but also increases the economic burden of enterprises, it is often used in the production of cement and in power plants as a flue gas desulfurizer. Since the produced calcium carbide slag still contains 4 to 10% of water, there are the following problems in the process of comprehensive utilization of resources:

When used in cement production, first, it is easy to cause the carbide slag in the batching warehouse to be unsmooth, and material blocking often occurs, resulting in the inability of continuous operation of production; Inaccurate ingredients lead to unstable quality of cement clinker, which in turn affects the product quality of cement products and has a great negative impact on the company's market competition; thirdly, because the existing production line cannot remove the ferrosilicon in carbide slag, As a result, the raw mill wears seriously, and the overhaul period is shortened, which seriously affects the operation rate of the cement production line. When used as a flue gas desulfurizer in a power plant, one is to block the discharge port of the transport tanker during transportation; the other is to block the carbide slag storage tank of the power plant, which increases the difficulty of using the carbide slag in the power plant and reduces the power plant’s use of carbide slag. Usage amount.

In view of the above problems, it is necessary to dry carbide slag, and the task of comprehensive utilization of carbide slag after drying is imminent.

There are two methods for drying calcium carbide slag in the new dry process cement production line: one is to dry the raw material at the same time as the raw material during the grinding process, that is, the drying and grinding system; the other is to use a separate drying equipment, the material is dried before entering the vertical mill.

The drying and grinding system can simplify the process, save equipment and investment, and has become the preferred process of the new dry process cement process; the vertical mill is currently the drying and grinding equipment with the strongest drying capacity, which can grind the materials Materials with comprehensive moisture up to 15% are dried and ground. In this technological process, wet carbide slag and cement raw materials enter the vertical mill together for drying in order to realize cement production, but dry carbide slag cannot be provided to power plants. At present, separate drying equipment is often used for the carbide slag provided to power plants. At present, there are two types of drying equipment commonly used: drying hammer crusher and rotary dryer. The drying hammer crusher is that the material enters the drying hammer crusher with the hot flue gas, and the high-speed rotating hammer head of the crusher lifts the material so that it can fully contact with the hot flue gas for heat exchange. The raw meal powder dried to a water content of less than 1% is collected by the waste flue gas into the dust collector, and finally enters the kiln for calcination. The rotary dryer is to put the calcium carbide slag after drying and pressing into the rotary dryer to dry to a semi-dry material with a water content of about 20%, and then mix it with other raw materials into the vertical mill for drying and grinding again. The hot flue gas of the dryer is provided by a single hot blast stove. However, the implementation of this technological process is to completely build an independent drying system outside the grinding system of the cement plant. Using this drying system to dry carbide slag alone is not only a large investment, but also a high operating cost.

Utility model content

(1) Technical problems to be solved

The utility model provides a raw material vertical mill system, which is simply modified on the basis of the original raw material vertical mill system, and can realize the drying of calcium carbide slag alone, and is used to solve the problem of the need to build an independent The drying system not only requires large investment and high operating costs, but also requires a large area of space.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a raw material vertical mill system, including a drying and grinding system, a raw material batching conveying system and a raw material batching system including a batching warehouse; the drying and grinding system includes a grinding Equipment, hot air supply system and material collection equipment, characterized in that the batching warehouse includes a wet calcium carbide slag storage warehouse and a dry calcium carbide slag storage warehouse, and the wet calcium carbide slag storage The slag is transported to the drying and grinding system; the raw meal vertical mill system also includes a pneumatic conveying system for transporting the dry carbide slag collected by the material collection device to the dry carbide slag storage.

Wherein, the pneumatic conveying system includes a pneumatic conveying pump and a pneumatic conveying pipeline connected with the pneumatic conveying pump, the pneumatic conveying pump is connected with the material collection equipment, and the pneumatic conveying pump is connected with the dry calcium carbide slag storage.

Wherein, the drying and grinding system includes a conveyor, and the conveyor transports the materials collected by the material collection equipment to the raw meal homogenization storage.

Wherein, the conveyor includes a chain conveyor and a screw conveyor.

Wherein, the material collection equipment includes a cyclone dust collector and a bag dust collector, the bag dust collector is connected to the chain conveyor, and the cyclone dust collector is connected to the screw conveyor.

Wherein, both the chain conveyor and the screw conveyor are connected with the pneumatic conveying pump.

Wherein, the pneumatic conveying pump is a packing pump.

Wherein, the dry carbide slag storage warehouse is connected to a dust collector for discharging the gas transporting the dry carbide slag.

Wherein, the raw material batching conveying system includes a belt conveyor, and the belt conveyor conveys wet electro-aggregate to the drying and grinding system.

(3) Beneficial effects

1. The raw material vertical mill system provided by the utility model is correspondingly transformed on the basis of the original raw material vertical mill system, and a storage warehouse in the raw material batching is changed into a dry calcium carbide slag storage warehouse, and a pneumatic conveying system is added. It can realize the separate drying of carbide slag when the raw meal vertical mill system does not carry out drying and grinding of raw meal. This solution is not only simple and easy to operate, but also can reduce the cost of drying carbide slag alone. In addition, through this improvement, dry carbide slag can be used for raw meal batching, which solves a series of problems caused by wet carbide slag batching. At the same time, dry carbide slag can be sold separately to power plants for desulfurization in power plants, increasing the economic benefits of enterprises.

2. In the raw material vertical mill system provided by the utility model, after the carbide slag is dried, the dry carbide slag is returned to the dry carbide slag storage by the pneumatic conveying pump and the pneumatic conveying pipeline. The flexible configuration of the conveying pipeline makes the production process of the factory more reasonable , the conveying system is completely closed, with less dust flying, which can meet the requirements of environmental protection, less moving parts, convenient maintenance, easy to realize automation, and can also send the materials concentrated from one point to one or from one point to scattered points , and realize remote operation.

Description of drawings

Fig. 1 is the structural representation of the raw material vertical mill system provided by the utility model;

In the figure, 1: drying and grinding system; 2: raw material batching system; 3: belt conveyor; 12: cyclone dust collector; 13: bag dust collector; 14: chain conveyor; 15: screw conveyor; 20: Batching warehouse; 21: Dry electricity slag storage; 22: Wet electricity slag storage; 23: Dust collector; 41: Pneumatic conveying pump; 42: Pneumatic conveying pipeline.

detailed description

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Preferred embodiments of the utility model are provided in the accompanying drawings. The above are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process conversion made by using the specification of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are all included in the scope of patent protection of the utility model in the same way.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used herein in the description of the utility model is only for the purpose of describing specific implementations, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a raw material vertical mill system, which is simply modified on the basis of the original raw material vertical mill system, and can realize the drying of calcium carbide slag alone, and is used to solve the problem of the need to build an independent The advanced drying system not only requires large investment and high operating costs, but also needs to occupy a large area of space.

As shown in Figure 1, a raw material vertical mill system is provided in the embodiment of the present utility model, including a drying and grinding system 1, a raw material batching conveying system, and a raw meal batching system 2 including a batching warehouse 20; System 1 includes grinding equipment 11, hot air supply system and material collection equipment. It is characterized in that batching warehouse 20 includes dry calcium carbide slag storage 21 and wet calcium carbide slag storage 22, and wet calcium carbide slag storage 22 is transported through raw material batching. The system transports the wet carbide slag to the drying and grinding system 1; the raw material vertical mill system also includes a pneumatic conveying system, which is used to transport the dry carbide slag collected by the material collection equipment to the dry carbide slag storage. The raw material vertical mill system provided by the utility model, on the basis of the original raw material vertical mill system, a dry calcium carbide slag storage warehouse is set in the raw material batching warehouse 20, and the raw material batching delivery system is used to transport the wet calcium carbide slag to the drying powder Grinding system 1 is used for drying and grinding, and is collected by material collection equipment, and the collected dry carbide slag is transported to dry carbide slag storage 21 in batching warehouse 20 through a pneumatic conveying system. That is to say, the utility model can be slightly improved on the basis of the original raw material vertical mill system to realize the separate drying of calcium carbide slag when raw material drying and grinding for cement are not carried out. This improvement scheme is not only simple and easy operation, and greatly reduces the cost of drying carbide slag alone.

In this embodiment, the pneumatic conveying system includes a pneumatic conveying pump 41 and a pneumatic conveying pipeline 42 connected to the pneumatic conveying pump. The pneumatic conveying pump 41 is connected to material collection equipment, and the pneumatic conveying pump 41 is connected to the dry calcium carbide slag storage 21 . The flexible configuration of the pneumatic conveying pipeline 42 makes the production process of the factory more reasonable, the pneumatic conveying system is completely closed, and there is less dust flying, which can meet environmental protection requirements, has few moving parts, is convenient for maintenance, and is easy to realize automation. The materials can be sent to one place or from one place to scattered points, and remote operation can be realized.

In this embodiment, the material collection equipment includes a cyclone dust collector 12 and a bag dust collector 13, the drying and grinding system 1 includes a conveyor, and a conveyor is arranged at the lower end of the cyclone dust collector 12 and the bag dust collector 13, The materials collected by the cyclone dust collector 12 and the bag dust collector 13 are transported to the raw material homogenization storage by the conveyor. Specifically, the conveyor includes a chain conveyor 14 and a screw conveyor 15 , the chain conveyor 14 is connected to the bag filter 13 , and the screw conveyor 15 is connected to the cyclone dust collector 12 . After passing through the grinding equipment 11, the materials that meet the fineness requirements are collected by the cyclone dust collector 12, and then transported by the screw conveyor 15 to the bucket elevator and the chute on the top of the warehouse to enter the raw material homogenization warehouse; The exhaust gas enters the bag dust collector 13 through the circulating fan, and the gas treated by the bag dust collector 13 is discharged into the atmosphere through the exhaust fan at the end of the cellar and the large chimney, and the powder collected by the bag dust collector 13 passes through the chain conveyor 14 Enter the raw meal homogenization warehouse.

In this embodiment, when the calcium carbide slag is dried alone, in order to transport the materials collected by the bag filter 12 and the cyclone dust collector 13 to the batching warehouse 20 in the raw meal batching system, the chain conveyor 14 and the screw conveyor The lower ends of 15 are all connected to the pneumatic conveying pump 41, and the dry carbide slag conveyed on the chain conveyor 14 and the screw conveyor 15 is transported to the dry carbide slag in the batching warehouse 20 through the pneumatic conveying pipeline 42 under the action of the pneumatic conveying pump 41. In the storage house 21, the raw materials for cement production or the desulfurizer for power plants are used.

In this embodiment, the pneumatic conveying pump 41 is a sealed material pump, which is a new type of powder pneumatic conveying equipment, which belongs to the category of low-pressure dilute phase conveying, and uses the ejection effect of high-speed airflow to convey powdery materials. The sealing material pump has the advantages of small equipment investment and low air supply pressure, which can reduce costs and save air consumption. In addition, it also has the characteristics of low pressure transmission, good equipment sealing and reliable operation.

In this embodiment, since the dry carbide slag is transported to the dry carbide slag storage 21 through the pneumatic conveying system, there is corresponding gas accompanying the dry carbide slag entering the dry carbide slag storage 21. The gas of the slag is discharged, and the dust collector 23 is connected to the outer end of the dry calcium carbide slag storage, and the gas is discharged through the dust collector 23, so that only the dry calcium carbide slag is stored in the dry calcium carbide slag storage 21.

In this embodiment, in order to transport the wet calcium carbide slag in the batching warehouse to the drying and grinding system 1, a belt conveyor 3 is set in the raw material batching conveying system, and the wet calcium carbide slag is transported to the drying and grinding system 1 through the function of the belt conveyor 3. Dry powder grinding system 1 for drying.

When the cement plant manufactures cement, the technological process of the raw meal vertical mill system of the utility model is as follows: the raw meal supplied from the raw meal batching system is dried and ground by the drying and grinding system, and the specific process is as follows: the raw meal enters On the track of the grinding disc of the grinding equipment 11, when the grinding disc rotates, the raw material is crushed and pulverized by the movement between the roller and the disc, and the pulverized material of a certain fineness overflows outwards through the rotating centrifugal force of the grinding disc. There is an air ring on the outer edge of the grinding disc, through which the rising airflow acts on the material, the rising airflow can not only prevent the material from falling through the air ring, but also allow the relatively heavy waste in the material to fall under the air ring and be discharged through the scraper body. The materials that meet the fineness requirements are conveyed upward by the airflow. After the materials reach the upper part of the mill of the grinding equipment, they are separated by the separator, and the materials with a certain fineness are sent out of the mill. The materials with larger particle sizes are thrown to the mill by the separator. On the inner wall of the cavity, it falls into the grinding disc for re-grinding. The materials that meet the fineness requirements are collected by the cyclone dust collector 12 and transported by the screw conveyor 15 to the storage bucket elevator and the chute on the top of the storage to enter the raw material homogenization storage. The exhaust gas from the mill enters the bag filter 13 through the circulating fan, and the gas treated by the bag filter 13 is discharged into the atmosphere through the exhaust fan at the end of the cellar and the large chimney, and the powder collected by the bag filter 13 passes through the chain Conveyor 14 enters raw material homogenization storehouse.

Among them, the raw material vertical mill system provided by the utility model can dry the calcium carbide slag separately when the raw material drying and grinding of cement are not carried out. The specific process is as follows:

The wet carbide slag in the batching warehouse 20 is transported to the drying and grinding system 1 through the raw meal conveying system in the raw meal vertical mill system. The wet carbide slag is dried and ground, and the dried dry carbide slag powder is passed through the cyclone The dust collector 13 and the bag filter 12 are collected, and then the collected dry calcium carbide slag is transported to the dry calcium carbide slag storage 21 in the batching warehouse through the pneumatic conveying pump 41 and the pneumatic conveying pipeline 42 of the pneumatic conveying system. The dry carbide slag stored in the dry carbide slag storehouse 21 can be directly used as a raw material for cement production, and can also be directly supplied to a power plant to be used as a desulfurizer for the power plant. When it is necessary to grind raw meal for cement production, the pneumatic conveying pump 41 under the conveyor is turned off, and after the dried raw meal powder fills the feeding pipeline under the conveyor, the raw meal powder continues to move forward and returns to the original state. In the raw material conveying system, the normal raw material drying and grinding process operations are carried out.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (9)

1. a kind of raw material vertical-grinding system, including drying grinding system, raw meal proportioning induction system and the raw material including dispensing storehouse Feed proportioning system；The drying grinding system includes milling equipment, warm-air supply system and material collection equipment, it is characterised in that The dispensing storehouse includes wet carbide slag bank and dry carbide slag storehouse bank, and the wet carbide slag bank is defeated by the raw meal proportioning Send system that wet carbide slag is delivered into the drying grinding system；The raw material vertical-grinding system also includes air-transport system, uses In the dry carbide slag that the material collection equipment is collected is delivered into the dry carbide slag bank.

2. raw material vertical-grinding system according to claim 1, it is characterised in that the air-transport system includes Geldart-D particle Pump and the Pneumatic conveying pipeline being connected with the Pneumatic conveying pump, the Pneumatic conveying pump connect the material collection equipment, institute State Pneumatic conveying pump and connect the dry carbide slag bank.

3. raw material vertical-grinding system according to claim 2, it is characterised in that the drying grinding system includes conveyer, The material that material collection equipment is collected is delivered to raw material homogenizing silo by the conveyer.

4. raw material vertical-grinding system according to claim 3, it is characterised in that the conveyer includes chain-linked conveyer and spiral shell Rotation conveyer.

5. raw material vertical-grinding system according to claim 4, it is characterised in that the material collection equipment includes cyclone dust collection Device and bagroom, the bagroom connect the chain-linked conveyer, and the rotoclone collector connects the spiral transferring Send machine.

6. raw material vertical-grinding system according to claim 4, it is characterised in that the chain-linked conveyer and the helical feed Machine is respectively connected with Pneumatic conveying pump.

7. the raw material vertical-grinding system according to any one of claim 2-6, it is characterised in that the Pneumatic conveying pump is envelope Material pump.

8. the raw material vertical-grinding system according to any one of claim 1-7, it is characterised in that the dry carbide slag bank connects Deduster is connect, the gas discharge for dry carbide slag will to be conveyed.

9. the raw material vertical-grinding system according to any one of claim 1-7, it is characterised in that the raw meal proportioning delivery system System includes belt feeder, and wet carbide slag is delivered to the drying grinding system by the belt feeder.