CN108654217A - A kind of granulating device and its working method suitable for enclosed purging - Google Patents

Abstract

The invention discloses a particle collector suitable for closed purging and its working method, which comprises an outer sleeve, an inner sleeve and a middle sleeve; the front end of the outer sleeve is open, the rear of the outer sleeve is The end is closed, the rear end of the middle sleeve is closed, and the front end of the middle sleeve is open, wherein the front end of the middle sleeve is inserted into the outer sleeve through the end face of the rear end of the outer sleeve, and the rear end of the inner sleeve is connected External air source, the front end of the inner sleeve protrudes out of the front end of the middle sleeve through the rear end of the middle sleeve, and the front end of the inner sleeve is a spindle structure; in the axial direction, the N The first through hole is facing the position where there is no opening on the side of the middle part of the inner sleeve; the bottom of the rear end side of the outer sleeve is connected with a short pipe for cleaning the external dirt, and the bottom of the rear end side of the middle sleeve is connected with an intermediate dirt. The short pipe of the object cleaning port, the particle collector and its working method can realize the non-stop collection of larger particles and some smaller particles in the working fluid.

Description

A particle collector suitable for closed-type purging and its working method

technical field

The invention belongs to the field of thermal power generation, and relates to a particle collector suitable for closed-type purging and a working method thereof.

Background technique

With the rapid development of science and technology, the Brayton cycle of supercritical carbon dioxide has become more mature and gradually applied in the process of competing with the conventional steam Rankine cycle. Due to the complex equipment of the power generation system, it is inevitable to form welding slag, scale and other debris in the system pipeline after the system is installed. Before the power generation system is put into operation, these debris must be removed.

For conventional steam generator sets, steam can be directly produced to purge and remove debris. But for the supercritical carbon dioxide Brayton cycle, the boiler or other heating equipment in the unit cannot be used to produce steam, on the one hand, because there is no steam-water separator, feed water pump, and water treatment system in the unit, saturated or superheated steam cannot be produced; On the other hand, it is because it is difficult to remove the water in the system, and it will be mixed with the operating fluid later, which will have an adverse effect on the system. In the absence of external steam, the supercritical carbon dioxide Brayton cycle can only use carbon dioxide as the work for purging. At the same time, because the working medium flow is huge during purging, it is impossible to directly empty the working medium, so only closed or Semi-closed purge scheme.

During the purging process of the steam Rankine generator set, the particle collector is generally installed between the superheater and the reheater to collect large particles and prevent the particles blown out of the superheater from entering the reheater, causing reheating. device damage. Small particles are then exhausted into the atmosphere with the airflow. For the closed purge process of the supercritical carbon dioxide Brayton cycle, the working fluid cannot be evacuated in large quantities, so it is necessary to use a filter to filter out the debris, and remove the filter to clean the debris when the machine is shut down. Since the working fluid after passing through the filter will enter the compressor, and the compressor has a high requirement on the size of the particles carried by the working fluid, generally less than 5 microns, so when a large amount of particles are deposited on the filter, the resistance of the filter will inevitably be very large , It may even make the flow rate of the working medium fail to meet the purge requirements, eventually resulting in the need to stop the machine several times to remove the filter and clean up the sundries.

In view of this, if the structure of the particle collector is redesigned, it can not only collect large particles, but also collect a part of small particles to share the pressure of the filter, thereby reducing the number of start and stop times of the unit during the purging process and shortening the time of purging. time and reduce purging costs.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a particle collector suitable for closed-type purging and its working method. The particle collector and its working method can realize larger particles and partial Non-stop collection of smaller particles.

In order to achieve the above purpose, the particle collector suitable for closed purging according to the present invention includes an outer sleeve, an inner sleeve and a middle sleeve;

The front end of the outer sleeve is open, the rear end of the outer sleeve is closed, the rear end of the middle sleeve is closed, and the front end of the middle sleeve is open, wherein the front end of the middle sleeve passes through the end face of the rear end of the outer sleeve and is inserted into the Inside the outer sleeve, the rear end of the inner sleeve is connected to the external air source, and the front end of the inner sleeve extends out of the front end of the middle sleeve through the rear end of the middle sleeve, and the front end of the inner sleeve is a spindle body structure;

A number of first through holes are opened on the front side of the middle sleeve; second through holes are opened on both sides of the inner sleeve, and each first through hole and each second through hole are located in the outer sleeve;

In the axial direction, the N first through holes on the rearmost side are facing the position where there is no opening on the side of the middle part of the inner sleeve;

The bottom of the rear side of the outer sleeve is connected with a short pipe for cleaning the outer dirt, and the bottom of the side of the rear end of the middle sleeve is connected with a short pipe for cleaning the middle dirt.

In the axial direction, the 7-11 first through holes on the rearmost side are facing the position where there is no opening on the side of the middle part of the inner sleeve.

The diameter of the first through hole is 6-14mm; the diameter of the second through hole is 2-8mm.

The short pipe of the outer dirt cleaning port is provided with a first valve.

The short pipe of the intermediate dirt cleaning port is provided with a second valve.

Reinforcing ribs are arranged between the outer sleeve, the middle sleeve and the inner sleeve.

The working method of the particle collector suitable for closed purging of the present invention is characterized in that it comprises the following steps:

The working medium carrying particles enters the inner sleeve through the rear end of the inner sleeve, and then guides through the spindle structure at the front end of the inner sleeve, so that the working medium carrying particles enters the outer sleeve and In the outer channel between the intermediate sleeves, since the density of the particles is greater than that of the working fluid, the larger particles and some smaller particles enter the short pipe of the outer dirt cleaning port under the action of inertia, and the remaining particles are smaller. Driven by the working medium, the particles enter the middle channel between the middle sleeve and the inner sleeve through the first through hole, and most of the fluid and particles pass through the N first through holes on the rearmost side of the middle sleeve. It enters the middle channel and hits the wall surface without openings on the inner sleeve, and then divides into two paths. Most of the fluid and particles flow to the short pipe of the middle dirt cleaning port, and the remaining fluid and particles move in the opposite direction. And finally into the inner sleeve.

The present invention has the following beneficial effects:

In the specific operation of the particle collector suitable for closed-type purging and its working method described in the present invention, under normal circumstances, the working medium carrying particles is guided through the spindle structure and then enters the outer channel. The particle density is greater than that of the working fluid, so the larger particles and some smaller particles enter the short pipe of the external dirt cleaning port under the action of inertia, and the remaining smaller particles are driven by the working fluid through the second channel. The hole enters the middle channel between the middle sleeve and the inner sleeve, and finally enters the short pipe of the middle dirt cleaning port under the action of inertia, so as to realize the collection of particles in the working fluid, so as to realize the non-stop operation of the particles clean up. The present invention collects most of the particles in the working fluid, thereby sharing the pressure of the filter in the closed-type purging, thereby reducing the number of start-up and stop times of the unit during the purging process, shortening the purging time, and reducing the purging cost.

Description of drawings

Fig. 1 structural representation of the present invention;

Fig. 2 is the enlarged view of place A in Fig. 1;

Fig. 3 is an enlarged view of B in Fig. 1 .

Among them, 1 is the outer sleeve, 2 is the reinforcing rib, 3 is the middle sleeve, 4 is the inner sleeve, 5 is the spindle structure, 6 is the short tube of the outer dirt cleaning port, and 7 is the middle dirt cleaning port Short tube, 8 is the first through hole, and 9 is the second through hole.

Detailed ways

The present invention is described in further detail below in conjunction with accompanying drawing:

As shown in Fig. 1, Fig. 2 and Fig. 3, the particle collector suitable for closed purging according to the present invention includes an outer sleeve 1, an inner sleeve 4 and an intermediate sleeve 3; the outer sleeve 1 The front end of the middle sleeve 3 is open, the rear end of the outer layer sleeve 1 is closed, the rear end of the middle sleeve 3 is closed, and the front end of the middle sleeve 3 is open, wherein the front end of the middle sleeve 3 is inserted into the In the outer sleeve 1, the rear end of the inner sleeve 4 is connected to an external air source, and the front end of the inner sleeve 4 passes through the rear end of the middle sleeve 3 and extends out of the front end of the middle sleeve 3, and the inner sleeve The front end of the barrel 4 is a spindle structure 5; the side of the front side of the middle sleeve 3 is provided with a number of first through holes 8; 8 and each second through hole 9 are located in the outer sleeve 1; in the axial direction, the N first through holes 8 on the rearmost side are facing the position where there is no opening on the side of the middle part of the inner sleeve 4; The bottom of the rear end side of the layer sleeve 1 is connected with a short pipe 6 for cleaning the outer dirt, and the bottom of the side of the rear end of the middle sleeve 3 is connected with a short pipe 7 for cleaning the middle dirt. Preferably, the 7-11 first through holes 8 on the rearmost side are facing the position where there is no hole on the side of the middle part of the inner sleeve 4 .

The aperture of the first through hole 8 is 6-14mm; the aperture of the second through hole 9 is 2-8mm; the short pipe 6 of the outer dirt cleaning port is provided with a first valve; the short pipe 7 of the middle dirt cleaning port is provided with The second valve; a reinforcing rib 2 is arranged between the outer sleeve 1 , the middle sleeve 3 and the inner sleeve 4 .

The working method of the particle collector suitable for closed purging of the present invention comprises the following steps:

The working medium carrying particles enters the inner sleeve 4 through the rear end of the inner sleeve 4, and then guides through the spindle structure 5 at the front end of the inner sleeve 4, so that the working medium carrying particles enters the outer sleeve 4. In the outer channel between the layer sleeve 1 and the middle sleeve 3, since the density of the particles is greater than that of the working fluid, the larger particles and some smaller particles enter the short dirt cleaning port under the action of inertia. In the tube 6, the remaining smaller particles are driven by the working medium through the first through hole 8 into the middle channel between the middle sleeve 3 and the inner sleeve 4, and most of the fluid and particles pass through the middle sleeve. The N first through holes 8 on the rearmost side of the cylinder 3 enter the middle passage, and hit the wall surface without openings on the inner sleeve 4, and then divide into two paths, wherein most of the fluid and particles flow to the middle dirt cleaning port Short pipe 7, the remaining fluid and particles move in the opposite direction, and finally enter the inner sleeve 4, and flow downstream.

When the first valve and the second valve were in the closed state, the particles would accumulate in the short pipe 6 of the outer dirt cleaning port and the short pipe 7 of the middle dirt cleaning port; when the first valve and the second valve were in the open state, the outer dirt The particles accumulated in the short pipe 6 of the dirt cleaning port and the short pipe 7 of the middle dirt cleaning port will be discharged.

Claims (7)

1. A particle collector suitable for closed purging, characterized in that it comprises an outer sleeve (1), an inner sleeve (4) and an intermediate sleeve (3); The front end of the outer sleeve (1) is open, the rear end of the outer sleeve (1) is closed, the rear end of the middle sleeve (3) is closed, and the front end of the middle sleeve (3) is open, wherein the middle sleeve ( 3) The front end of the outer sleeve (1) is inserted into the outer sleeve (1) through the end surface of the rear end of the outer sleeve (1), the rear end of the inner sleeve (4) is connected to the external air source, and the inner sleeve (4) The front end passes through the end surface of the rear end of the middle sleeve (3) and protrudes out of the front end of the middle sleeve (3), and the front end of the inner sleeve (4) is a spindle structure (5); The front side of the middle sleeve (3) is provided with a plurality of first through holes (8); the side surfaces of both sides of the inner sleeve (4) are provided with second through holes (9), each of the first through holes (8 ) and each second through hole (9) are located in the outer sleeve (1); In the axial direction, the N first through holes (8) on the rearmost side are facing the position where there is no opening on the side of the middle part of the inner sleeve (4); The bottom of the rear end side of the outer sleeve (1) is communicated with a short pipe (6) for the outer dirt cleaning port, and the bottom of the rear end side of the middle sleeve (3) is connected with a short pipe (7) for the middle dirt cleaning port. 2. The particle collector suitable for closed-type purging according to claim 1, characterized in that, in the axial direction, the last 7-11 first through holes (8) are facing the inner sleeve (4) There is no opening on the side of the middle part. 3. The particle collector suitable for closed purging according to claim 1, characterized in that, the aperture of the first through hole (8) is 6-14mm; the aperture of the second through hole (9) is 2- 8mm. 4. The particle collector suitable for closed-type purging according to claim 1, characterized in that the short pipe (6) of the external dirt cleaning port is provided with a first valve. 5. The particle collector suitable for closed-type purging according to claim 4, characterized in that, the short pipe (7) of the intermediate dirt cleaning port is provided with a second valve. 6. The particle collector suitable for closed-type purging according to claim 1, characterized in that, there is a Ribs (2). 7. A working method of the particle collector suitable for closed purging according to claim 1, characterized in that, comprising the following steps: The working medium carrying particles enters the inner sleeve (4) through the rear end of the inner sleeve (4), and then guides through the spindle structure (5) at the front end of the inner sleeve (4), so that the The working fluid with particles enters the outer channel between the outer sleeve (1) and the middle sleeve (3). Since the density of the particles is greater than that of the working fluid, the larger particles and some smaller particles are Under the action of inertia, it enters the short pipe (6) of the outer dirt cleaning port, and the remaining smaller particles enter the middle sleeve (3) and the inner sleeve through the first through hole (8) driven by the working fluid. In the intermediate channel between the cylinders (4), most of the fluid and particles enter the intermediate channel through the N first through holes (8) at the rearmost side of the intermediate sleeve (3), and hit the inner sleeve (4 ) on the wall without openings, and then divided into two paths, wherein, most of the fluid and particles flow to the short pipe (7) of the middle dirt cleaning port, and the remaining fluid and particles move in the opposite direction, and finally enter the inner layer in the sleeve (4).