CN210065189U - A system for forming pulverized coal and quicklime powder - Google Patents

Abstract

The utility model provides a system for forming coal powder and quicklime powder. an inlet and an outlet for powdered lime, the pulverized coal silo has a pulverized coal inlet and an outlet for pulverized coal, the first stirring device has a mixing inlet and a mixing outlet, and the second stirring device has a first inlet, a second The third feeding port and the first feeding port of the feeding port, the quicklime powder outlet is connected with the mixing inlet, the mixing outlet is connected with the first feeding port, the coal powder outlet is connected with the second feeding port The feeding port is connected, and the first discharging port is connected with the feeding port of the pressing ball forming device. The cost of raw materials required by the pulverized coal and quicklime powder forming system of the utility model is low, and no special processing is required. , reducing the processing process and reducing the emission of pollutants.

Description

A system for forming pulverized coal and quicklime powder

technical field

The utility model relates to the technical field of calcium carbide production equipment, in particular to a system for forming coal powder and quicklime powder.

Background technique

At present, calcium carbide enterprises use blue carbon as the raw material of calcium carbide. After transporting, drying, screening and other processes, 10% to 30% of the powder produced cannot be added to the calcium carbide furnace, and can only be burned as ordinary fuel. In addition, in the production process of blue carbon, the sensible heat of blue carbon cannot be fully recycled, resulting in huge waste. At the same time, in the process of coal production and quicklime production, a large amount of pulverized coal and quicklime cannot be utilized, resulting in a large amount of energy waste and environmental pollution.

Utility model content

In view of this, the utility model aims to propose a system for forming coal powder and quicklime powder, so as to solve the problem that in the production process of coal and quicklime, a large amount of pulverized coal and quicklime cannot be utilized, resulting in a large amount of energy waste and Technical problems of environmental pollution.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A system for forming coal powder and quicklime powder, comprising a quicklime powder bin, a coal powder bin, a first stirring device, a second stirring device and a briquetting device, wherein the quicklime powder bin has a quicklime powder inlet and a quicklime powder outlet , the pulverized coal silo has a pulverized coal inlet and a pulverized coal outlet, the first stirring device has a mixing inlet and a mixing outlet, the second stirring device has a first feeding port, a second feeding port, a third feeding port The feed inlet and the first discharge port, the quicklime powder outlet is connected with the mixing inlet, the mixing outlet is connected with the first feeding port, the coal powder outlet is connected with the second feeding port, The first discharge port is connected with the feed port of the ball pressure forming device.

Further, it also includes a material storage tank, the material storage tank has a tank inlet and a tank outlet, and the tank outlet is connected to the mixing inlet.

Further, the storage tank is loaded with a first binder, and the first binder is used to form a hydrophobic passivation film on the surface of the quicklime powder.

Further, a pump body is provided at the tank outlet of the storage tank.

Further, it also includes a storage bin, the storage bin has a bin inlet and a bin outlet, and the bin outlet is connected to the third inlet.

Further, the quicklime powder outlet of the quicklime powder bin, the coal powder outlet of the coal powder bin and the bin outlet of the storage bin are all provided with a vibrating feeding device.

Further, the storage bin is loaded with a second binder, and the second binder is used for bonding the coal powder and the quicklime powder.

Further, the first binder is coal tar, anthracene oil or heavy oil, and the added amount of the first binder and the mass ratio of the quicklime powder are about 1-10%.

Further, the second binder is a mixture of pitch, caking coal and humic acid, and the ratio of the added amount of the second binder to the mass of the mixture is about 1-20%.

Further, the first stirring device is a twin-shaft mixer, and the second stirring device is an intensive mixer.

Compared with the prior art, the system for forming pulverized coal and quicklime powder according to the present utility model has the following advantages:

The pulverized coal and quicklime powder molding system of the utility model uses pulverized coal and quicklime for processing and molding, the required raw material cost is low, no special processing is required, the processing procedure is reduced, and the discharge of pollutants is reduced.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

In the attached image:

1 is a schematic diagram of a system for forming pulverized coal and quicklime powder according to an embodiment of the present utility model;

FIG. 2 is a schematic flow chart of the method for preparing pellets by using the system shown in FIG. 1 according to the present invention.

Description of reference numbers:

1- Storage tank, 2- Quick lime powder bin, 3- Coal powder bin, 4- Storage bin, 5- Vibration feeding device, 6- Pump body, 7- First stirring device, 8- Second stirring device, 9-Ball forming device.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figure 1-2, a system for forming coal powder and quicklime powder includes quicklime powder bin 2, coal powder bin 3, first stirring device 7, second stirring device 8 and briquetting device 9, Preferably, the first stirring device is a double-shaft mixer, which preliminarily mixes the quicklime powder and the first binder, and the quicklime powder can use the sieve of the quicklime block, and does not need to be crushed and milled, which reduces the cost. At the same time, the discharge of solid waste is reduced, and the first binder forms a hydrophobic passivation film on the surface of the quicklime powder to prevent the digestion reaction of the quicklime powder and water; preferably, the second stirring device is a strong mixer The intensive mixer further mixes and stirs the mixed quicklime powder, coal powder with a particle size of less than 3 mm and the second binder to obtain a mixed material whose main components are coal powder and quicklime powder, and the mixing time is about 5 minutes, preferably The said ball-forming device is a high-pressure ball press, and the mixed material is pressed to obtain a mixed pellet with a uniform size. 5mm) is not less than 95%, has high cold strength, is not easy to break, and has high strength after pyrolysis, which meets the production requirements of calcium carbide furnaces. The pressed green pellets are sent to the vertical furnace pyrolysis unit for heating. Solution, the optimal selection of high-pressure briquetting machine specifications is that the diameter of the briquetting roller is 800mm, the maximum pressure between the briquetting rollers is 380t, the line pressure is 11t/cm, the briquetting rate of the briquetting machine is greater than 90%, and the briquetting machine has Pre-compression function, the ball press is equipped with a spherical mold, which is used to control the shape and specification of the required balls. The quicklime powder bin 2 has a quicklime powder inlet and a quicklime powder outlet, and the coal powder bin 3 has coal powder. Inlet and pulverized coal outlet, the first stirring device 7 has a mixing inlet and a mixing outlet, the second stirring device 8 has a first inlet, a second inlet, a third inlet and a first outlet The second stirring device is connected to the first stirring device through the first feeding port, the second stirring device is connected to the pulverized coal silo through the second feeding port, and the second stirring device is connected to the storage bin through the third feeding port Connected, the amount of the mixed material, pulverized coal and the second binder of the first stirring device is adjusted separately without interfering with each other, and the ratio of the mixed material, pulverized coal and the second binder can be adjusted at any time according to the actual production situation Adjustment is performed to improve the yield, the quicklime powder outlet is connected with the mixing inlet, the mixing outlet is connected with the first feeding port, the coal powder outlet is connected with the second feeding port, and the first feeding port is connected. A discharge port is connected to the feed port of the ball pressing device 9, the ratio of coal powder and quicklime powder is easy to adjust, adapts to the complex working conditions of calcium carbide production, and can produce high-quality calcium carbide, and also includes a storage bin 4, The storage bin 4 has an inlet port and an outlet port, and the outlet port is connected with the third inlet port.

Also includes a storage tank 1, the storage tank 1 has a tank inlet and a tank outlet, the tank outlet is connected to the mixing inlet, and a pump body is provided at the tank outlet of the storage tank 1 6. It is convenient to control the amount of the first binder in the storage tank through the pump body.

The storage tank 1 is loaded with a first binder, which is used to form a hydrophobic passivation film on the surface of the quicklime powder. After the powder is directly mixed, the quicklime powder easily absorbs the moisture in the pulverized coal, and the digestion reaction of lime occurs, which expands the volume of the pellet and reduces the cold strength and stability of the pellet. The purpose of mixing with the first binder and the quicklime powder is to form a hydrophobic passivation film on the surface of the quicklime powder to prevent the digestion reaction of the quicklime powder and water, which is beneficial to the next step of mixing and molding. A binder is coal tar, anthracene oil or heavy oil, and the added amount of the first binder and the mass ratio of the quicklime powder are about 1-10%, so that the quicklime powder and the first binder can be fully Mixing to form a hydrophobic film on the surface of the quicklime powder, preferably, coal tar is selected as the first binder, the coal tar can form a hydrophobic passivation film on the surface of the quicklime, which can hinder the digestion reaction of the quicklime powder and water; coal tar It has certain bonding properties; coal tar can be obtained in the pyrolysis process of pellets, which is a by-product and has low cost.

The storage bin 4 is loaded with a second binder, and the second binder is used to bond the coal powder and the quicklime powder. The second binder is a mixture of asphalt, caking coal and humic acid, which is a by-product of coal chemical industry and has low cost. It can be that the second binder and the mixed material are fully mixed to better exert the effect of the second binder.

The quicklime powder in the quicklime powder bin 2 is transported to the double-shaft mixer through the vibrating feeder, and the first binder in the storage tank is also transported to the double-shaft mixer through the pump body for uniform mixing, so that the surface of the quicklime powder forms a layer of hydrophobic passivation film, after being stirred by the double-shaft mixer, the mixture of quicklime powder and the first binder is transported into the strong mixer through the first feeding port, and the coal powder silo and the storage silo are simultaneously intensively mixed. The pulverized coal and the second binder are transported in the machine, and are mixed in a strong mixer for a second time.

The system for forming pulverized coal and quicklime powder adopts two kinds of binders, namely the first binder and the second binder, which are mixed in two times, and each material is added separately without interfering with each other, which is convenient for use. The proportion of each material added is controlled, thereby improving the yield of the system, and at the same time avoiding the interaction between the two binders, thereby affecting the effect of the finished product.

The quicklime powder outlet of the quicklime powder bin 2, the coal powder outlet of the coal powder bin 3 and the outlet of the storage bin 4 are all provided with a vibrating feeding device 5, preferably, the vibrating feeding device is a vibrating feeder, The feeding is uniform, the continuous performance is good, the flow can be changed and controlled at any time, and the operation is convenient.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the protection scope of the present invention.

Claims (4)

1. A system for forming coal powder and quicklime powder, characterized in that it comprises a quicklime powder bin (2), a coal powder bin (3), a first stirring device (7), a second stirring device (8) and A briquetting forming device (9), the quicklime powder bin (2) has a quicklime powder inlet and a quicklime powder outlet, the coal powder bin (3) has a coal powder inlet and a coal powder outlet, the first stirring device (7) ) has a mixing inlet and a mixing outlet, the second stirring device (8) has a first feeding port, a second feeding port, a third feeding port and a first discharging port, the quicklime powder outlet and the mixing The material inlet is connected, the mixing outlet is connected with the first material inlet, the pulverized coal outlet is connected with the second material inlet, and the first outlet is connected with the ball pressing device (9). The feed port is connected to the feed port, and also includes a material storage tank (1), the material storage tank (1) has a tank inlet port and a tank outlet port, the tank outlet port is connected with the mixing inlet, and the material storage tank (1) A first binder is loaded inside, and the first binder is used to form a layer of hydrophobic passivation film on the surface of the quicklime powder, and also includes a storage bin (4), the storage bin (4) It has an inlet port and an outlet port, the outlet port is connected to the third inlet port, and the storage bin (4) is loaded with a second binder, the second binder Used to bond coal powder and quicklime powder. 2 . The system for forming pulverized coal and quicklime powder according to claim 1 , wherein a pump body ( 6 ) is provided at the outlet of the storage tank ( 1 ). 3 . 3. The system for forming pulverized coal and quicklime powder according to claim 1, characterized in that the quicklime powder outlet of the quicklime powder bin (2), the coal powder outlet of the coal powder bin (3) and the storage material A vibrating feeding device (5) is provided at the outlet of the bin (4). 4 . The system for forming pulverized coal and quicklime powder according to claim 1 , wherein the first stirring device ( 7 ) is a double-shaft agitator, and the second stirring device ( 8 ) is a strong mixing device. 5 . machine.

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