TWI472468B - A device of pneumatically conveying pulverulent body - Google Patents

Description

Fine powder pneumatic conveying device

The invention relates to a fine powder pneumatic conveying device, in particular to a method for pumping a powder by a pneumatic pneumatic conveying method by using a negative pressure pumping method, so that the gas and the powder pass through the multi-directional diverter valve and the inflow through the gas inlet line. The gas pipelines are connected to each other and then connected to the inlet of the cyclone separation device to be separated into a plurality of pocket separators having a cyclone separation device, and are separated by a gas valve, a multidirectional diverter valve and a bottom cover valve at the bottom of the cyclone separation device to make the bag The chamber separator can be controlled as a separate use or for cleaning the discharge to achieve the purpose of continuous pneumatic conveying of the powder.

According to the pneumatic conveying, the air is used as a working carrier to transport the powder. Since the main design parameters of the gas as the carrier are flow velocity and pressure, the pneumatic conveying can also be classified into the following design parameters: (1) Dilute Phase Transportation using gas kinetic energy, the fluid flow rate is usually designed. It is 15~30m/s; and (2) Dense Phase Transportation using gas static pressure: its fluid flow rate is usually designed to be 1~2m/s.

Pneumatic conveying design calculation and correct selection of components are the key to the success or failure of powder pneumatic conveying; the correctness of the calculation method and the accuracy of the results, and whether the equipment components are selected correctly will affect the design operation stability and system operation of the equipment. The fluency. Although the literature on pneumatic conveying is very much discussed and the theoretical basis is extremely complete, there are few detailed discussions on the applicable formulas and methods of use.

However, since powder transportation is a mature unit operation, it is widely used in the industry. In the manufacturing industry, powder conveying materials are often used, such as additives in food factories, raw material transportation in plastics manufacturing, raw material transportation in LCD industry, waste treatment in incineration plants, etc., and powders are required in the process. Conveying equipment. Powder transport can usually be divided into two categories: one is mechanical transport, the other is pneumatic transport; and the mechanical transport method has many links, often subject to space constraints, low efficiency, and is more likely to cause environmental pollution. Therefore, in the automation industry, pneumatic conveying methods are more commonly used.

However, for applications requiring a large, continuous and stable supply of fine powder, such as a fiber alcohol plant, due to the different lengths and uneven properties of the fiber powder, it is easy to cause blockage of pipelines and equipment when pneumatic conveying is used. Difficulties in delivery.

In view of this, the inventors of this case have intensively discussed the above-mentioned problems of conventional inventions, and actively pursued solutions through years of experience in R&D and manufacturing of related industries. After long-term efforts in research and development, they have finally succeeded in developing this book. Invented the "fine powder pneumatic conveying device" to improve various problems in the past.

The main object of the present invention is that it does not suffer from the continuity of the operation due to the particle size distribution, and can be continuously operated without periodic shutdown.

Another object of the present invention is to enable the fine powder by pneumatic force to be separated and cleaned in sequence by using a plurality of bag separators having a cyclone separation device, thereby achieving continuous conveying and separation.

In order to achieve the above object, the present invention is a fine powder pneumatic conveying device comprising: a multidirectional diverting valve.

Most of the cyclone separation devices are respectively connected to the multi-directional diverter valve by a sub-inflow line, and the bottom of each cyclone separation device is respectively provided with a bottom cover valve.

A plurality of bag compartment separators are respectively disposed on each of the cyclone separating devices, and the outlets of the baghouse separators are respectively provided with gas valves.

Most of the filter bags are combined with the bag compartment separators, and each filter bag is provided with a high-pressure air nozzle.

Thereby, the powder can be sucked by the pneumatic pneumatic conveying method by using the negative pressure pumping method, so that the gas and the powder are connected to the sub-inflow line through the multi-directional diverter valve through the inlet line, and then connected to the inlet of the cyclone separation device. At most arrays of chamber separators with cyclone separation devices are separated and controlled by gas valves, multi-directional diverter valves and bottom cover valves at the bottom of the cyclone separation unit, so that the bag compartment separator can be controlled for separation or for cleaning discharge In order to achieve the purpose of continuous pneumatic conveying of powder.

In an embodiment of the present invention, when the bag separator is used separately, the gas valve is opened, the bottom cover valve at the bottom of the cyclone separation device is closed, and the multi-directional diverter valve connects the inlet pipe to the sub-inflow line. .

In an embodiment of the present invention, the bag chamber separator is closed when the discharge operation is performed, the bottom cover valve at the bottom of the cyclone separation device is opened, and the multi-directional diverter valve is such that the inlet line and the inflow line are Will not be connected, start the high pressure air nozzle for backwashing the filter bag.

In an embodiment of the present invention, the cyclone separation device is disposed under the baghouse separator, so that the airflow carrying the powder can enter the baghouse separator in a tangential cyclone manner to generate a ring-shaped ascending airflow, so that the powder and the dust are removed. The contact surface of the bag is increased to increase the separation efficiency.

1‧‧‧ powder

2‧‧‧Multidirectional diverter valve

3‧‧‧ bag compartment separator

4‧‧‧ Bag compartment separator

5‧‧‧Inducing exhaust fan

6‧‧‧Clean air

7‧‧‧ powder

8‧‧‧Intake pipeline

10‧‧‧ filter bag

11‧‧‧Cyclone separation device

12‧‧‧Bottom cover valve

13‧‧‧Bottom cover valve drive

14a‧‧‧Solenoid valve

14b‧‧‧Solenoid valve

14c‧‧‧ solenoid valve

15‧‧‧ gas valve

16‧‧‧Clean gas pipeline

17‧‧‧ points into the gas pipeline

18‧‧‧ barrel

19‧‧‧ powder discharge

20‧‧‧ filter bags

21‧‧‧Cyclone separation device

22‧‧‧Bottom cover valve

23‧‧‧Bottom cover valve drive

24a‧‧‧ solenoid valve

24b‧‧‧ solenoid valve

24c‧‧‧ solenoid valve

25‧‧‧ gas valve

26‧‧‧Clean gas pipeline

27‧‧‧ points into the gas pipeline

28‧‧‧ barrel

29‧‧‧ powder discharge

30‧‧‧Powder collection bucket

31‧‧‧Powder screw conveyor

103‧‧‧Bottom cover valve pneumatic cylinder

104‧‧‧Bottom cover valve crank

105‧‧‧Bottom cover valve plate

110‧‧‧Backwashing device

111‧‧‧High pressure air nozzle

203‧‧‧Bottom cover valve pneumatic cylinder

204‧‧‧Bottom cover valve crank

205‧‧‧Bottom cover valve plate

210‧‧‧Backwashing device

211‧‧‧High pressure air nozzle

300‧‧‧Flour conveying inlet

301‧‧‧Intake room

302‧‧‧Distribution of air outlet

303‧‧‧ gas distribution room

305‧‧‧Pneumatic cylinder group

310‧‧‧ pneumatic cylinder group

311‧‧‧Butterfly valve

312‧‧"Butterfly valve

315‧‧‧Clean air supply valve

Fig. 1 is a schematic view showing the pneumatic conveying process of the fine powder of the present invention.

Fig. 2 is a schematic view showing a bag chamber separator having a cyclone separation device of the present invention.

Figure 3 is a bag chamber separator with a cyclone separation device of the present invention installed on a powder body Schematic diagram of the barrel.

Fig. 4 is a schematic view showing the relationship between the bag chamber separator and the multidirectional diverter valve having the cyclone separation device of the present invention.

Fig. 5 is a side elevational view showing the multidirectional diverter valve of the present invention.

Fig. 6 is a front elevational view showing the multidirectional diverter valve of the present invention.

Please refer to the "1, 2, 3, 4, 5, and 6" diagrams, which are schematic diagrams of the pneumatic conveying process of the fine powder of the present invention, and the schematic diagram of the bag chamber separator having the cyclone separation device of the present invention, and the present invention. Schematic diagram of a bag chamber separator having a cyclone separation device installed in a powder collecting bucket, a schematic diagram of a relationship between a bag chamber separator having a cyclone separating device and a multidirectional diverter valve, and a side view of the multidirectional diverter valve of the present invention A schematic view of the front view of the multidirectional diverter valve of the present invention. As shown in the figure: the present invention is a fine powder pneumatic conveying device comprising at least one multi-directional diverter valve 2, a plurality of cyclone separating devices 11, 21, a plurality of bag chamber separators 3, 4 and a plurality of filter bags 10, 20 Composition.

Each of the cyclone separating devices 11, 21 mentioned above is connected to the multi-directional diverter valve 2 by the sub-inflow lines 17, 27, and the bottom cover valves 12, 22 are respectively provided at the bottom of each of the cyclone separating devices 11, 21.

Each of the bag compartment separators 3, 4 is provided on each of the cyclone separating devices 11, 21, and the outlets of the baghouse separators 3, 4 are provided with gas valves 15, 25, respectively.

Each of the filter bags 10, 20 is coupled to each of the bag compartment separators 3, 4, and high pressure air nozzles 111, 211 are provided on each of the filter bags 10, 20.

When the present invention is applied, the method 1 is used to induce the negative pressure pumping by the exhaust fan 5, and the powder 1 is sucked by the fluid pneumatic conveying method, and is transported at most through the air inlet line 8. The array has the bag separators 3 and 4 of the cyclonic separating devices 11 and 21 separated; wherein the bag separator 3 having the cyclonic separating device 11 has a plurality of filter bags 10 mounted in the upper barrel 18, each filter Above the bag 10 is a backwashing device 110 (shown as a venturi tube as shown in Fig. 2), which is backwashed by a high pressure air nozzle 111 above it; a cyclone separating device is provided at a lower portion of the barrel 18 on which the filter bag is mounted. 11. The airflow carrying the powder can enter the baghouse separator 3 in a tangential cyclone manner to generate a ring-shaped ascending airflow, which increases the contact surface between the powder and the dust bag, and increases the separation efficiency.

The baghouse separator 4 having the cyclone separating device 21 has a plurality of filter bags 20 installed in the upper barrel 28 thereof, and each of the filter bags 20 has a backwashing device 210 (as shown in FIG. 2, The tube is backwashed by the high-pressure air nozzle 211 above it; and a cyclone separating device 21 is disposed at the lower portion of the barrel 28 on which the filter bag is installed, so that the airflow carrying the powder can enter the baghouse separator 4 in a tangential cyclone manner. A ring-shaped ascending airflow is generated to increase the contact surface between the powder and the dust bag, thereby increasing the separation efficiency. When using a multi-array baghouse separator, the rest is the same.

Further, as shown in Figs. 1 and 2, at the bottom of the bag chamber separator 3 having the cyclone separating device 11, a bottom cover valve 12 driven by the bottom cover valve driving device 13 is provided, and the bottom cover valve driving device 13 is provided. The utility model comprises a bottom cover valve pneumatic cylinder 103, a bottom cover valve crank 104 and a bottom cover valve pressure plate 105. When the bottom cover valve 12 is opened or closed, the bottom cover valve pneumatic cylinder 103 is actuated, and the bottom cover valve crank 104 is pushed to be utilized. The bottom cover valve pressure plate 105 opens or closes the bottom cover valve 12; when the bag chamber separator 3 is in the cleaning stage, the gas valve 15 and the butterfly valve 311 connected to the inlet of the cyclone separation device 11 are closed, and the bottom cover valve is used for driving. The device 13 opens the bottom cover valve 12, and then sequentially opens the electromagnetic valve 14a, the electromagnetic valve 14b and the electromagnetic valve 14c, and instantaneously injects high-pressure air into the filter bag 10 via the high-pressure air nozzle 111 and the back-washing device 110, so that the filter bag 10 instantaneous expansion and contraction, so that the powder 7 is discharged 19 from below.

In addition, when the bag compartment separator 3 is in the washing stage, the bag compartment separator 4 is in a filtration separation operation state. At this time, at the bottom of the bag compartment separator 4 having the cyclone separating device 21, a bottom cover valve driving device is provided. 23 driving bottom cover valve 22, when the bottom cover valve driving device 23 includes a bottom cover valve pneumatic cylinder 203, a bottom cover valve crank 204 and a bottom cover valve pressure plate 205, when opening or closing the bottom cover valve 22, as long as the bottom cover is actuated The valve pneumatic cylinder 203 pushes the bottom cover valve crank 204 to open or close the bottom cover valve 22 by the bottom cover valve pressure plate 205; when the bag chamber separator 4 is in the filter separation operation state, the gas valve 25 and the cyclone should be opened. The butterfly valve 312 is connected to the inlet of the separating device 21, and the bottom cover valve 22 is closed by the bottom cover valve driving device 23. Then, the electromagnetic valve 24a, the electromagnetic valve 24b and the electromagnetic valve 24c are closed, so that the high-pressure air does not pass through the high-pressure air. The nozzle 211 and the backwashing device 210 inject high-pressure air into the filter bag 20, so that the filter bag 20 is instantaneously expanded and contracted, that is, the powder 7 is not caused to discharge the powder 29 from below. On the contrary, when the bag compartment separator 3 is in the filtration separation operation state, the gas valve 15 and the butterfly valve 311 connected to the inlet of the cyclone separation device 11 should be opened, and the bottom cover valve 12 is closed by the bottom cover valve driving device 13, and then, The solenoid valve 14a, the solenoid valve 14b and the solenoid valve 14c are closed so that the high pressure air does not pass through the high pressure air nozzle 111 and the backwashing air blowing device 110, injecting high-pressure air into the filter bag 10, so that the filter bag 10 does not instantaneously expand and contract, so that the powder 7 is discharged from below 19 by the powder; at this time, the baghouse separator 4 Should be in the cleaning stage, the gas valve 25 and the butterfly valve 312 connected to the inlet of the cyclone separation device 21 should be closed, and the bottom cover valve 22 is opened by the bottom cover valve driving device 23, and then the solenoid valve 24a and the solenoid valve 24b are sequentially opened. And the electromagnetic valve 214c, so that the high-pressure air instantaneously injects the high-pressure air into the filter bag 20 via the high-pressure air nozzle 211 and the back-washing device 210, so that the filter bag 20 is instantaneously expanded and contracted, that is, the powder 7 is caused to be under the filter The powder is discharged 29; and the bag separators 3, 4 can be connected to a common powder collecting bucket 30, and at the bottom of the powder collecting bucket 30, a powder auger 31 is provided to continuously carry the powder 7 discharge.

Further, as shown in the first, fourth, fifth and sixth figures, the multidirectional diverter valve 2 has a powder delivery inlet 300 connected to the inlet line 8, and the powder is pneumatically conveyed through the powder delivery inlet. 300, the butterfly valve 311 and the butterfly valve 312 are used to control the flow direction; the distribution air outlet 302 is connected to the sub-inflow line 17 and the sub-inflow line 27, and the multi-directional diverter valve 2 has a plurality of butterfly valves 311 and 312. The air cylinder group 305 and the air cylinder group 310 are respectively driven, and when the butterfly valve 311 is opened, the butterfly valve 312 must be in a closed state; otherwise, when the butterfly valve 311 is closed, the butterfly valve 312 must be in an open state. After the distributed airflow, through the gas distribution chamber 303, the air distribution is distributed through the distribution air outlet 302 to the sub-intake gas line 17 and the sub-inflow line 27 to achieve an effective distribution control flow direction. A purge air supply valve 315 is provided at the bottom of the multidirectional diverter valve 2 to facilitate the discharge of deposited foreign matter.

However, most of the bag compartment separators 3, 4 having the cyclonic separating means 11, 12 are controlled by the multidirectional diverter valve 2 and the bottom cover valves 12, 22 at the bottom so that they can be controlled for separation or for cleaning. In order to achieve the purpose of continuous pneumatic conveying of powder.

Thus, the present invention can conveniently transport powders of various densities and particle sizes, which have at least the following advantages such as:

1. In various industrial applications, pneumatic conveying can successfully transport solids in different particle size ranges.

2. Pneumatic conveying can use a large flow of gas to quickly transport the powder, and the gas pressure and flow rate can be used to control the transportation throughput.

3. Pneumatic transport The transportable powder can range in size from micron to a few centimeters.

And according to their characteristics, the pneumatic conveying system can be classified into the following categories:

(1). Dilute phase transportation by pneumatic conveying: The fluid flow rate of the dilute phase transportation is usually designed to be 15~30m/s; it is characterized by low solid-gas ratio, and the powder is evenly dispersed in the conveying airflow. The dilute phase conveying system can be further classified according to its operating pressure: negative pressure conveying of air pressure -0.1~-0.05bar, low pressure conveying of air pressure 0.1~0.5bar, medium pressure conveying of air pressure 0.5~2bar, air pressure 0.1~ 0.5bar circulating conveying, combined air delivery with air pressure of -0.1~-0.05bar and air pressure of 0.1~0.5bar.

(2). Dense phase transport using gas static pressure delivery: The fluid flow rate of the dense phase transport is usually designed to be 1~2 m/s; the solid powder is fluidized by the transport gas or transported as a plug flow. The dense phase transport system can be further classified according to its operating characteristics: air pressure 3~7bar to mix air and powder into fluidized high pressure suction, and air pressure 1~2bar using air pulse transport.

In summary, the fine powder pneumatic conveying device of the present invention can effectively improve various disadvantages of the conventional use, and the powder can be sucked by the fluid pneumatic conveying method by using the negative pressure pumping method, so that the gas and the powder pass through the multi-directionality through the gas inlet pipeline. The diverter valve is connected to the sub-inflow line, and is connected to the inlet of the cyclone separator to be transported to a plurality of pocket separators having a cyclone separation device, and is separated by a gas valve, a multi-directional diverter valve and a bottom cover of the bottom of the cyclone separation device. The valve control enables the bag compartment separator to be controlled for separation or cleaning to achieve the purpose of continuous pneumatic conveying of the powder; thereby making the invention more progressive, more practical and more suitable for consumer use. It has indeed met the requirements of the invention patent application, filed a patent application according to law, and filed a patent application according to law.

However, the above description is only a preferred embodiment of the present invention, and cannot be limited thereto. The scope of the present invention is intended to be within the scope of the invention as defined by the appended claims.

1‧‧‧ powder

2‧‧‧Multidirectional diverter valve

3‧‧‧ bag compartment separator

4‧‧‧ Bag compartment separator

5‧‧‧Inducing exhaust fan

6‧‧‧Clean air

7‧‧‧ powder

8‧‧‧Intake pipeline

10‧‧‧ filter bags

11‧‧‧Cyclone separation device

12‧‧‧Bottom cover valve

13‧‧‧Bottom cover valve drive

14a‧‧‧Solenoid valve

14b‧‧‧Solenoid valve

14c‧‧‧ solenoid valve

15‧‧‧ gas valve

16‧‧‧Clean gas pipeline

17‧‧‧ points into the gas pipeline

18‧‧‧ barrel

19‧‧‧ powder discharge

20‧‧‧ filter bags

21‧‧‧Cyclone separation device

22‧‧‧Bottom cover valve

23‧‧‧Bottom cover valve drive

24a‧‧‧ solenoid valve

24b‧‧‧ solenoid valve

24c‧‧‧ solenoid valve

25‧‧‧ gas valve

26‧‧‧Clean gas pipeline

27‧‧‧ points into the gas pipeline

28‧‧‧ barrel

29‧‧‧ powder discharge

311‧‧‧Butterfly valve

312‧‧"Butterfly valve

Claims (4)

A fine powder pneumatic conveying device comprises: a multi-directional diverter valve; a plurality of cyclone separating devices are respectively connected to the multi-directional diverting valve by a sub-inflow line, and the bottom part of each cyclone separating device is respectively provided with a bottom cover a valve; a plurality of bag compartment separators are respectively disposed on each cyclone separating device, and each bag chamber separator is respectively provided with a gas valve; and a plurality of filter bags are respectively combined with the bag chamber separators, and each The filter bag is provided with a high-pressure air nozzle; thereby, the powder can be sucked by the fluid pneumatic conveying method by using the negative pressure pumping method, so that the gas and the powder are connected to the sub-inflow line through the multi-directional diverter valve through the inlet line. And connected to the inlet of the cyclone separation device to be transported to a plurality of pocket separators having a cyclone separation device for separation, and controlled by a gas valve, a multidirectional diverter valve and a bottom cover valve at the bottom of the cyclone separation device, so that at least two sets of bags are The chamber separators are alternately operated, and a set of bag chamber separators are separated for separation operation, and another group of bag chamber separators are combined for cleaning and dust removing operations, so that each bag chamber is divided. You may control or used as a clean separation discharge at any time without affecting the operation and interruption of powder transport, to achieve the purpose of continuous pneumatic conveying of powder. The fine powder pneumatic conveying device according to claim 1, wherein the bag chamber separator is opened, the gas valve is opened, the bottom cover valve at the bottom of the cyclone separating device is closed, and the multi-directional diverter valve is The inlet line is connected to the sub-inflow line. The fine powder pneumatic conveying device according to claim 1, wherein the bag chamber separator is closed during the cleaning and discharging operation, and the bottom cover valve at the bottom of the cyclone separating device is opened, and the multi-directional shunt is The valve does not allow the inlet and outlet lines to communicate with each other, and the high pressure air nozzle is activated to perform backwashing of the filter bag. The fine powder pneumatic conveying device according to the first aspect of the invention, wherein the cyclone separating device is disposed under the bag compartment separator, so that the airflow carrying the powder can enter the bag chamber separator in a tangential cyclone manner, thereby generating The annular updraft increases the contact surface between the powder and the dust bag, increasing the separation efficiency.