CN210934299U

CN210934299U - Continuous circulation negative pressure method purification CZ furnace system

Info

Publication number: CN210934299U
Application number: CN201921534705.6U
Authority: CN
Inventors: 刘志娇; 贺琪
Original assignee: Xinjiang Oriental Hope New Energy Co ltd
Current assignee: Xinjiang Oriental Hope New Energy Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-07-07
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a continuous circulation negative pressure method CZ furnace purification system, which comprises a bin filter, wherein the bin filter mainly comprises a storage bin and an air purifying chamber; the vacuum pump is characterized in that 72 cylindrical filter bags are arranged in the storage bin, the air purifying chamber is arranged above the storage bin, the air purifying chamber is connected with an inlet of the constant volume roots pump, clean air flow passing through the filter bags is collected in the air purifying chamber and enters an inlet of the vacuum pump, and a high negative pressure safety vent valve is arranged at an outlet end of the air purifying chamber; the air purifying chamber is also internally provided with a compressed air pulse back-blowing device which is used for cleaning the filter bag at any time; the utility model has the advantages that: the dust removal effect required by the CZ furnace is achieved, the environmental hazard is reduced, the manpower and material resources are saved, the economic benefit of production is improved, the economic burden of a manufacturer is reduced, and the economic benefit of an enterprise is increased.

Description

Continuous circulation negative pressure method purification CZ furnace system

Technical Field

The utility model relates to a purify CZ stove, specifically speaking are continuous circulation negative pressure method purifies CZ stove system belongs to and purifies CZ stove field.

Background

Along with the rapid development of polycrystalline silicon trade, current dust remover is mostly whole air dust removal in workshop or small-size electrostatic precipitator appearance, can not accomplish to concentrate quick dust removal to the occasion that workshop local process can produce the dust, and the produced dust of production causes the pollution to workshop environment to cause harm to operating personnel's health easily.

The existing dust removing equipment in the market mostly adopts a fan or electrostatic dust removal, the dust removing effect of the existing dust removing equipment in the working process is general, a lot of particles are still mixed in discharged gas, and even if the dust removing effect of the large dust removing equipment is good, the cost is high, the occupied area is large, and therefore the existing dust removing equipment is still to be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses a continuous cycle negative pressure method purifies CZ stove system has reached the dust removal effect that the CZ stove required, has reduced environmental hazard, has practiced thrift manpower and materials, has improved the economic benefits of production to alleviateed manufacturer's economic burden, increased enterprise economic benefits.

The technical scheme of the utility model is that:

a CZ furnace purification system adopting a continuous circulation negative pressure method comprises a bin filter, wherein the bin filter mainly comprises a storage bin and an air purifying chamber, and materials and gas are separated by adopting a centrifugal mode, a sedimentation mode and a filter bag filtering mode.

Be equipped with 72 barrels and cross the filter bag in the storage silo, the material is subsided through the dilatation after getting into storage silo 3 from the material mouth that inhales that sets up in CZ stove top side, and a part of material that is heavier falls in storage silo 3 lower part, and another part is taken away along with the air current. The gas passing through the cylindrical filter bag filters out 99.9% of net airflow of particles larger than 1 micron, and protects the vacuum pump and the environment.

The air purifying chamber is arranged above the storage bin, the air purifying chamber is connected with an inlet of the constant-volume roots pump, clean air flow passing through the filter bag is collected in the air purifying chamber and enters an inlet of the vacuum pump, a high negative pressure safety vent valve is arranged at an outlet end of the air purifying chamber, and when the vacuum degree rises to 15 mercury columns, the safety vent valve can automatically open to suck air so as to protect the vacuum pump; and a compressed air pulse back-blowing device is also arranged in the air purifying chamber and used for cleaning the filter bag at any time.

The compressed air pulse back-blowing device comprises a compressed air tank, a filter, a pressure regulating valve, an oil-water separator, a back-blowing diaphragm valve and a solenoid valve thereof, wherein the compressed air tank, the filter, the pressure regulating valve, the oil-water separator, the back-blowing diaphragm valve and the solenoid valve thereof are sequentially connected, the compressed air generated by an external air source realizes the back-blowing cleaning of the filter bag, and when the pressure is lower than 0.4MPa, the system is automatically stopped.

The vacuum pump is a constant volume roots pump, the constant volume roots pump is used as a vacuum source of the whole system, negative pressure can be controlled to be 15' inches of mercury, and the vacuum pump is ensured to run in a good working area. The negative pressure in the system is normally kept between 5 "and 30" inches of mercury, and the system is automatically started when the set low pressure is reached, so that the normal work is ensured.

The negative pressure that the vacuum pump produced can satisfy and set up 6 absorption mouths simultaneous workings in CZ stove top bottom, the stable performance.

The pressure is in the set range, the dust removal system can be normally used, and when the pressure of the compressed air is lower than 0.4MPa, the power system automatically stops running.

The working principle is as follows: utilize the lobe pump among the power device as the vacuum source, produce in the negative pressure inhales the pipeline with the bulk cargo, the material is through the transportation and the collection of pipeline, get into the feed bin filter, be equipped with 72 cylinder filter bags in the feed bin filter, the material gets into from inhaling the material mouth and collects the back of fighting, subsides through the dilatation, partly heavier material falls on collecting the lower part of fighting, the material that another part was taken away along with the air current is filtered, reach the air-purifying chamber, discharge through the blast pipe in getting into the vacuum pump, thereby the dust removal effect that the CZ stove required has been reached.

The utility model has the advantages that: the dust removal effect required by the CZ furnace is achieved, the environmental hazard is reduced, the manpower and material resources are saved, the economic benefit of production is improved, the economic burden of a manufacturer is reduced, and the economic benefit of an enterprise is increased.

The present invention will be further explained with reference to the drawings and examples.

Drawings

FIG. 1 is a structural schematic diagram of a constant volume Roots pump;

FIG. 2 is a diagram of a Roots pump;

FIG. 3 is a schematic diagram of a bin filter according to an embodiment of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic view of a power plant according to an embodiment of the present invention;

fig. 6 is a top view of fig. 5.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.

Example 1

A continuous circulation negative pressure method CZ furnace purification system comprises a bin filter (shown in figure 4), wherein the bin filter mainly comprises a storage bin and an air purifying chamber, the air purifying chamber is arranged above the storage bin, and the air purifying chamber is connected with an inlet of a constant volume roots pump.

Aiming at materials with different bulk densities, the materials can be blown away in a pipeline by overcoming the gravity of the materials with different wind speeds, so that enough negative pressure and air volume are needed, and a constant volume Roots vacuum pump (as shown in figure 1) is adopted as a vacuum source of the whole system to generate enough negative pressure and air volume.

As shown in fig. 1, a pair of vane rotors are provided in a pump body of the roots pump, and air is moved by a pushing action of the rotors rotating in synchronization and in reverse to each other to perform air suction.

A bypass pipeline is arranged between an outlet (air outlet) and an inlet (air inlet) of the Roots pump, a bypass valve is arranged on the bypass pipeline, and the bypass valve adopts a mechanical automatic pressure regulating bypass valve. The bypass valve is installed on a pipeline between the outlet of the constant volume Roots pump and the inlet of the silencer. When the differential pressure reaches the rated value, the bypass valve is automatically opened by the action of the differential pressure, so that the outlet and the inlet of the constant volume Roots pump are communicated, the differential pressure between the outlet and the inlet is rapidly reduced, and the Roots pump works under the load almost without differential pressure. When the differential pressure is lower than the rated value, the valve is automatically closed, the gas is pumped away by the backing pump through the roots pump, and the roots pump with the bypass overflow valve can be started simultaneously with the backing pump, so that the unit is simple and convenient to operate.

As shown in fig. 3, the stock bin filter comprises a negative pressure pipeline isolation valve 1, a level gauge 2, a storage hopper 3, a discharge valve 4, an air purifying chamber 5, a filter bag 6, a support cage and a blowback pipe 7; the bin filter is internally provided with 72 cylindrical filter bags, and after materials enter the collecting hopper from the material suction port, the materials are subjected to dilatation and sedimentation, and a part of heavier materials fall on the lower part of the collecting hopper;

the air purifying chamber 5 is arranged above the storage bin 3, clean air flow passing through the filter bag 6 is collected in the air purifying chamber and enters an inlet of the vacuum pump, a high negative pressure safety vent valve is arranged behind the air purifying chamber 5, and when the vacuum degree rises to 15 mercury columns, the safety vent valve can be automatically opened to automatically suck air so as to protect the vacuum pump; the air purifying chamber 5 is also provided with a compressed air pulse back blowing device which is used for cleaning the filter bag at any time. The function of the material gas separation is to make the material enter the vacuum pump and enter the hopper before entering the vacuum pump, and to ensure the air flow entering the vacuum pump is clean, and the material and the gas are separated by adopting the modes of centrifugation, sedimentation and filtration with a filter bag.

The vacuum pump is a heart for purifying the CZ furnace system by a continuous circulation negative pressure method, and because gaps between an impeller and the impeller and between the impeller and a pump shell are narrow, once larger material particles enter the vacuum pump, the inside of the vacuum pump is damaged, and the service cycle of the vacuum pump is ensured by adopting an efficient material-gas separation mode and a series of effective automatic control protection measures.

As shown in fig. 4, the power device of the embodiment of the present invention includes a constant volume roots pump 8, a compressed air tank 9, a motor 10, and a silencer 11.

The power of the motor 10 is 55KW, the motor 10 drives the constant volume Roots pump 8 through a belt to provide power for the constant volume Roots pump, and the constant volume Roots pump rotates to generate negative pressure; the constant volume roots pump 8 is connected with a silencer 11 through a pipeline;

it can be seen from the graph of fig. 2 that when the negative pressure is lower than 16 ″ (inches of mercury), the air volume of the constant volume roots pump is obviously increased, so that the delivery volume of the constant volume roots pump is rapidly increased, and the negative pressure of the system is increased; when the negative pressure rises to the position of 30' (inches of mercury), the air volume can be obviously reduced, so that the delivery volume is rapidly reduced, and the negative pressure of the system is reduced. When the negative pressure is increased to the position of 30' (inch mercury), the service life of the sealing element is shortened, the abrasion of the pipeline is increased, so that a good system is provided, the proper negative pressure and enough air quantity required by normal conveying are maintained, and the system adopts a constant volume roots pump with large air quantity and high negative pressure on vacuum equipment, controls the negative pressure to be 16kpa, and ensures that the constant volume roots pump runs in a good working area.

The continuous circulation negative pressure method for purifying the CZ furnace system uses a constant volume roots pump as a vacuum source of the whole system, can control the negative pressure to be 16' (inch mercury) and ensures that the vacuum pump runs in a good working area. The negative pressure in the system is normally maintained at 16 "-30" (inches of mercury), and the system will automatically start when the set low pressure is reached.

The system has a material level turn-off mechanism, when the hopper of the main machine is full, the system can be automatically turned off, and the system is turned on after the hopper is emptied.

The filter bag is too high in differential pressure inside and outside (more than 40 inches of water column), the system can be automatically stopped, and the filter bag can be restarted after being cleaned.

Claims

1. Continuous circulation negative pressure method purifies CZ stove system which characterized in that: the device comprises a bin filter, wherein the bin filter mainly comprises a storage bin and an air purifying chamber; the vacuum pump is characterized in that 72 cylindrical filter bags are arranged in the storage bin, the air purifying chamber is arranged above the storage bin, the air purifying chamber is connected with an inlet of the constant volume roots pump, clean air flow passing through the filter bags is collected in the air purifying chamber and enters an inlet of the vacuum pump, a high negative pressure safety vent valve is arranged at an outlet end of the air purifying chamber, and when the vacuum degree rises to 15 mercury columns, the safety vent valve can automatically open to suck air; and a compressed air pulse back-blowing device is also arranged in the air purifying chamber and used for cleaning the filter bag at any time.

2. The continuous cycle negative pressure clean-up CZ furnace system of claim 1, wherein: the compressed air pulse back-blowing device comprises a compressed air tank, a filter, a pressure regulating valve, an oil-water separator, a back-blowing diaphragm valve and an electromagnetic valve thereof which are sequentially connected.

3. The continuous cycle negative pressure clean-up CZ furnace system of claim 1, wherein: and the roots pump is in transmission connection with the motor.

4. The continuous cycle negative pressure clean-up CZ furnace system of claim 1, wherein: and a silencer is arranged at the outlet end of the Roots pump.