CN218945011U

CN218945011U - Powder ball negative pressure system

Info

Publication number: CN218945011U
Application number: CN202220816075.7U
Authority: CN
Inventors: 周爱江; 叶卉; 朱明胜; 李洪洲
Original assignee: Beijing Lanbuxi Technology Co ltd
Current assignee: Beijing Lanbuxi Technology Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2023-05-02
Anticipated expiration: 2032-04-08

Abstract

The utility model provides a powder ball pressing negative pressure system which comprises a negative pressure machine, a filtering device, a blowing device, a gas storage tank, a forced feeder, a powder bin and a ball pressing machine; the negative pressure machine is connected with an air outlet of the filtering device, an air inlet of the filtering device is connected with an air outlet of the forced feeder, the top of the filtering device is connected with the blowing device, the bottom of the filtering device is connected with the powder bin, the blowing device is connected with the air storage tank, the powder bin is connected with a feed inlet of the forced feeder, and the forced feeder is connected with a feed inlet of the ball pressing machine. According to the powder ball pressing negative pressure system, air in powder is discharged, so that the air content in the pellets after powder ball pressing is reduced, the compactness of the pellets is increased, the strength and thermal stability of the pellets are improved, the strength of the pressed pellets can be adjusted as required by reducing the negative pressure value of the negative pressure system, the problems that the pellets are low in strength and easy to pulverize in a high-temperature use environment are solved, and conditions are created for enterprises to circularly and comprehensively utilize powdery wastes.

Description

Powder ball negative pressure system

Technical Field

The utility model relates to the technical field of powder material ball pressing, in particular to a powder ball pressing negative pressure system.

Background

In the field of mineral material processing production, part of production process has certain requirements on the granularity of raw materials, materials smaller than the granularity requirements are generally abandoned as waste, along with the development of economy and the development of technology, comprehensive recycling of waste becomes a necessary trend of economic construction, along with the development of powder balling technology, more and more powder waste is utilized after balling, and the emission of solid waste is reduced. The powder material is pressed into balls through the powder ball pressing production line, so that dust emission can be avoided in the production or transportation process, the pollution to the environment is reduced, the use safety is improved, and especially, the low added value products are reused after being processed, so that the raw material sources can be effectively widened, and the production cost is reduced.

However, for some equipment in the field of hot working, such as a calcium carbide furnace, an iron-making furnace, a semi-coke furnace and the like, pellets pressed by powdery materials are required to have certain strength in a cold state and also required to have certain strength in a hot state, so that gas generated in a furnace body can be discharged through gaps among particles, and explosion and material collapse accidents in the equipment are avoided.

In the prior art, the bonding agent is generally added into the powder to improve the pressure between the rollers of the granulator, or the powder is pre-pressed and crushed to form certain grain size and then enters a ball pressing machine to be pressed into balls, and the measures can improve the compactness of the balls and increase the cold state strength of the balls. However, the addition of the binder increases the cost of raw materials, increases the pressure between the rollers of the granulator, increases the energy consumption of the system, and cannot completely discharge the air in the powder material after pre-pressing and granulating.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a powder ball pressing negative pressure system to improve the strength and thermal stability of the powder pressed pellets and improve the comprehensive recycling rate of powder wastes.

The utility model adopts the following technical proposal to solve the defects of the technology:

the powder ball pressing negative pressure system comprises a negative pressure machine, a filtering device, a blowing device, a gas storage tank, a forced feeder, a powder bin and a ball pressing machine; the negative pressure machine is connected with an air outlet of the filtering device, an air inlet of the filtering device is connected with an air outlet of the forced feeder, the top of the filtering device is connected with the blowing device, the bottom of the filtering device is connected with the powder bin, the blowing device is also connected with the air storage tank, the powder bin is connected with a feed inlet of the forced feeder, and the forced feeder is connected with a feed inlet of the ball pressing machine.

Further, the pressure maintained by the negative pressure system in the forced feeder is-1 to-85 kPa.

Further, the negative pressure machine comprises one of a vacuum pump, a centrifugal ventilator, a Roots blower and other gas conveying equipment.

Further, the forced feeder is provided with a variable-frequency speed regulating device.

Further, the gas stored in the gas storage tank is clean compressed air after drying, degreasing, dewatering and dedusting.

Further, the clean compressed air is controlled by the blowing device to regularly and quantitatively blow the dust on the filtering device, and the back blowing pressure is 0.3-0.6 MPa.

Further, the ball pressing machine adopts a hydraulic system to press, and the pressure is 5-12MPa.

Compared with the prior art, the utility model has the following technical advantages:

according to the powder ball pressing negative pressure system, air in powder is discharged, so that the air content in the pellets after powder ball pressing is reduced, the compactness of the pellets is increased, the strength and thermal stability of the pellets are improved, a binder is not used, the power of a ball pressing machine is not increased, the pressed pellet strength can be adjusted according to the requirement by reducing the negative pressure value of the negative pressure system, the technical problems that the strength of the pellets pressed by the powder is low and the powder is easy to pulverize in a high-temperature use environment are solved, and conditions are created for the cyclic comprehensive utilization of powdery wastes for production enterprises.

Drawings

FIG. 1 is a schematic diagram of a powder ball press negative pressure system of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "linked" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1, the embodiment provides a powder ball pressing negative pressure system, which comprises a negative pressure machine, a filtering device, a blowing device, a gas storage tank, a forced feeder, a powder bin and a ball pressing machine; the negative pressure machine is connected with an air outlet of the filtering device, an air inlet of the filtering device is connected with an air outlet of the forced feeder, the top of the filtering device is connected with the blowing device, the bottom of the filtering device is connected with the powder bin, the blowing device is also connected with the air storage tank, the powder bin is connected with a feed inlet of the forced feeder, and the forced feeder is connected with a feed inlet of the ball pressing machine.

As a preferable example, the negative pressure system in the forced feeder maintains the pressure between-1 and-85 kPa.

As a preferable example, the negative pressure machine includes one of a vacuum pump, a centrifugal fan, a Roots blower, and the like.

As a preferred example, the forced feeder is provided with a variable frequency speed regulating device.

As a preferred example, the gas stored in the gas storage tank is clean compressed air after drying, degreasing, dewatering and dedusting.

As a preferable example, the clean compressed air is controlled by the blowing device to regularly and quantitatively blow the dust on the filtering device, and the back blowing pressure is 0.3-0.6 MPa.

As a preferable example, the ball press is pressurized by a hydraulic system, and the pressure is 5-12MPa.

The specific working principle of the powder ball pressing negative pressure system provided by the embodiment is as follows:

the powder in the powder bin is fed into a forced feeder after being metered, the forced feeder presses the powder into a space between two roll shafts of a ball pressing machine to be pressed into spherical particles, an exhaust port of the forced feeder is connected with a filtering device, the filtering device is connected with a negative pressure machine, and under the suction force of the negative pressure machine, air in the powder in the forced feeder enters the filtering device through the exhaust port to be purified, and clean air after filtration is discharged into the atmosphere through the negative pressure machine. When dust on the filter material in the filter device is increased and system resistance is increased, the electromagnetic valve on the injection device is opened, high-pressure clean compressed air in the air storage tank is reversely injected on the filter material, so that dust adsorbed on the filter material is settled at the bottom of the filter device, and the electromagnetic valve is closed after injection. The bottom of the filtering device is connected with the powder bin, so that dust adsorbed on the filtering material enters the powder bin again to achieve cyclic utilization. The value of the system negative pressure is determined according to the strength of the finished pellets, the higher the strength requirement of the pellets is, the lower the setting of the system negative pressure is, and the system negative pressure value can be determined according to the strength actually measured by the pellets, so that the negative pressure system configuration is economical and reasonable.

The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.

Claims

1. The powder ball pressing negative pressure system is characterized by comprising a negative pressure machine, a filtering device, a blowing device, a gas storage tank, a forced feeder, a powder bin and a ball pressing machine; the negative pressure machine is connected with an air outlet of the filtering device, an air inlet of the filtering device is connected with an air outlet of the forced feeder, the top of the filtering device is connected with the blowing device, the bottom of the filtering device is connected with the powder bin, the blowing device is also connected with the air storage tank, the powder bin is connected with a feed inlet of the forced feeder, and the forced feeder is connected with a feed inlet of the ball pressing machine.

2. The powder ball-pressing negative pressure system according to claim 1, wherein the negative pressure system in the forced feeder maintains a pressure of-1 to-85 kPa.

3. The powder ball-pressing negative pressure system of claim 1, wherein the negative pressure machine comprises one of a vacuum pump, a centrifugal fan, and a Roots blower.

4. The powder ball pressing negative pressure system according to claim 1, wherein the forced feeder is provided with a variable frequency speed regulating device.

5. The powder ball pressing negative pressure system according to claim 1, wherein the gas stored in the gas storage tank is clean compressed air after drying, degreasing, dewatering and dedusting.

6. The powder ball pressing negative pressure system according to claim 5, wherein the clean compressed air is used for controlling the timing and the quantification of dust on the back-blowing filtering device by the blowing device, and the back-blowing pressure is 0.3-0.6 MPa.

7. The powder ball pressing negative pressure system according to claim 1, wherein the ball pressing machine is pressurized by a hydraulic system at a pressure of 5-12MPa.