JP2006061897A - Two-stage separation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a two-stage separation apparatus capable of solving problems in conventional technologies, particularly, increase in size of an entire apparatus, restriction on installation place, difficulty in maintenance, deterioration in separation performance and premature deterioration in separation performance of a filter or the like, and a separation method. <P>SOLUTION: The inside of a cylindrical vessel 1 is separated into a first separation region 2 and a second separation region 3 by a cylindrical partition 4 to allow a fluid to be processed to pass through both of the first separation region and the second separation region. The retention time of the fluid to be processed in the vessel is set long, and in the process of passing through the vessel, firstly the fluid to be processed is turned in the first separation region along the inner circumference of the cylindrical vessel to centrifugally separate foreign matters in the fluid by a cyclone, and then the residual foreign matters are removed from the fluid to be processed by a second separator set in the second separation region. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  This invention is a two-stage separation device for purifying a fluid to be treated such as exhaust gas, waste oil, sewage or the like mixed with foreign matters such as dust, dust, sludge, solid waste, and more specifically, a cyclone separator and a cyclone separator, or The present invention relates to an improvement of a two-stage separation apparatus in which a cyclone separator and a filter are integrally combined to purify a fluid to be treated in two stages.

  The device that purifies the fluid to be treated that contains foreign matter includes a bag filter or cartridge filter made of cloth or paper, and allows the fluid to be treated to capture the foreign matter, cylindrical or conical. Or a combination of both, the fluid to be treated is fed tangentially to generate a vortex, and the centrifugal force generated by the swirling separates the foreign matter, or a simple cylindrical shape There is an accumulation type filtration in which sand, pebbles, large stones, etc. are stacked in a container to form a filtration layer, and a fluid to be treated is passed through the filtration layer to trap foreign matter, and a combination thereof. .

Conventionally, a two-stage separator, especially a cyclone separator in the first stage and a cyclone separator or other separator in the second stage are connected in series. There are already many known two-stage separation devices that remove the foreign matters and then remove the remaining foreign matters with the subsequent second-stage separator (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 04-267915 (page 4, FIG. 4) Japanese Patent Laid-Open No. 11-33868 (page 12, FIG. 8)

  However, since the purification function of these two-stage separators is simply a combination of fixed construction specifications connected by a guide channel, the types and treatments of the above-mentioned various fluids to be treated It is difficult to select a purification function corresponding to the amount and design. Considering the cyclone separator, in order to improve its processing capacity, for example, the diameter of the cyclone separator must be increased or the number of cyclone separators must be increased to multiple, In order to improve the separation performance, it is necessary to increase the cyclone height so as to increase the residence time of the fluid to be treated in the container. If these conditions are satisfied, the vortex velocity of the fluid to be processed in the cyclone separator will decrease, the centrifugal force will drop, the size and height of the entire device will increase, and the cost will rise. Location constraints and maintenance difficulties increase, and as a result, the fixed range of separation performance cannot be exceeded. Also, when considering the second-stage separator following the first-stage processing, the second stage receives the previous-stage separation performance properly, which causes clogging early and deteriorates the separation performance of the entire device. To do. As a result, when a simple bag filter or cartridge filter is used for the second-stage separator, the replacement frequency increases. Waste disposal problems such as increased running costs due to filter replacement and disposal of used filters occur.

  Among the problems of the prior art as described above, the present invention intends to increase the residence time of the fluid to be treated in the container in order to improve the separation performance of the cyclone portion as the first stage treatment. To solve the problem that the separation performance is deteriorated early in the separation part of the second stage, and to continuously remove foreign matters efficiently and at low cost, purify and reuse the fluid to be treated It was invented in order to obtain a two-stage separator intended to allow

Means to solve the problem

  In order to achieve the above-mentioned problems and objects, the present invention divides the inside of a cylindrical container into a first separation region and a second separation region by a cylindrical partition, and introduces a fluid to be treated into the first separation region. At the same time, in the process of guiding to the second separation region through the connecting flow path provided below the cylindrical partition wall and passing through both separation regions, first, the fluid to be treated in the first separation region along the inner circumference of the cylindrical container A two-stage separator that swirls and centrifuges the foreign matter in the fluid to be treated with a cyclone, and then separates and removes the remaining foreign matter with a secondary separator installed in the second separation region. It is intended to solve by providing.

  In the present invention, the secondary separator is a cyclone separator, the secondary separator is also a coil spring filter, and the attached foreign matter is cleaned by expanding the coil spring. Each embodiment includes a mode in which the gap between the lower end of the cyclone separator installed in the second separation region and the lower end of the cylindrical container is determined to be 15% or less of the introduction flow rate of the fluid to be processed.

The invention's effect

The present invention has the following effects.
I. Since the inside of the filtration cylindrical container is divided into a first separation area and a second separation area by a cylindrical partition, the fluid to be treated passes through both the first separation area and the second separation area. It is possible to take a long residence time to give a high flow rate to the fluid to be treated, and to clean, separate and filter more than a conventional combined filter without increasing the height and outer diameter of the cyclone while being a small filter. Demonstrate the function.
B. Since the first separation region is mainly composed of a cyclone, it is possible to reduce the separation / filtration load of the subsequent secondary separator and extend the life of the secondary separator. As a result, maintenance of the secondary separator, for example, the performance that can be said to be maintenance-free, which makes the replacement and regeneration of the filter extremely small, reduces the operation efficiency due to the replacement work time and the suspension of the filtration operation, the filter replacement Eliminate waste problems such as increased running costs and disposal of used filters.
C. Since each component is collected in a single cylindrical container, piping to connect each component is not necessary compared to conventional combined filtration devices, resulting in a compact device and high cost. Without being restricted by the installation location, it is possible to eliminate the dangers of maintenance work at high places, etc., and comprehensively a separation device that overcomes the fixed separation performance of each component. Obtainable.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. A two-stage separation method and a two-stage separation apparatus for a fluid to be treated according to the present invention include a cylindrical partition wall 4 that partitions the inside of a cylindrical container 1 into a first separation area 2 and a second separation area 3, and a first An inlet pipe 7 for introducing a fluid to be treated into the separation region, a communication channel 5 communicating the first separation region and the second separation region disposed below the cylindrical partition, and an upper portion of the second separation region. It comprises an outlet pipe 8 for the fluid to be treated, a blow pipe 11 provided at the lower part of the cylindrical container via an on-off valve 10, and a secondary separator 6 installed inside the second separation region. The

  The first separation region 2 forming the cyclone generates a vortex in the fluid to be treated that is fed in the tangential direction from the inlet pipe 7, and the foreign matter is separated by the centrifugal force generated by the swirling, and the separated foreign matter is cylindrical. Gravity falls along the circumferential surface of the container and is periodically discharged from the blow pipe 11 through the on-off valve 10 to the outside of the cylindrical container. The to-be-processed fluid from which the foreign matter has been separated enters the second separation region 3 through the communication flow path 5, and the remaining foreign matter is separated and removed by the secondary separator 6 provided in this region. The secondary separator in this embodiment forms a cyclone as a second stage, and the fluid to be treated that has risen from the communication flow path 5 is fed in the tangential direction from the inlet 62 to generate a vortex in the fluid to be treated. The foreign matter is separated by the centrifugal force generated by the swirling, and, like the foreign matter described above, gravity falls along the inner peripheral surface of the secondary separator 6 forming the cyclone, and periodically passes through the on-off valve 10 and the blow pipe 11. It is discharged out of the cylindrical container. The to-be-processed fluid from which the foreign matter has been separated is sent out of the cylindrical container from the outlet pipe 8 and reused.

  As described above, since the present invention is provided with two separators in one cylindrical container, the inlet / outlet of the fluid to be processed is shared by the inlet pipe 7 and the outlet pipe 8. On the other hand, a foreign matter outlet such as sludge is also shared by the on-off valve 10. Therefore, the lower end 64 of the secondary separator and the lower end of the cylindrical container 1 are free passages when viewed from the fluid to be treated, and this free passage is positive due to the pressure difference between the two separators during the separation operation of the apparatus. Possible backflow. Since this forward / reverse motion causes obstacles to the power drop of foreign matter and the recovery of the clarified liquid, it is important to set a stagnant zone that maintains a mutually independent state although it is a free passage. In order to stagnate the fluid to be treated in this stagnation zone, the supply amount from the inlet pipe 7, the discharge amount from the outlet pipe 8, the operating pressure difference between the two separators, the balance, the cyclone lower end 64 and the cylindrical container 1 Synergistic effects such as the ratio of the respective opening cross-sectional areas at the lower end are involved, but considering the total cost of the entire apparatus, the opening ratio between the two is preferably 15:85 (15%). In this way, the fluid to be treated passes through the two separation regions so that the residence time in the cylindrical container is maintained for a long time for filtration and separation. There is no need to say that it can be adjusted by increasing or decreasing.

  Next, a second embodiment will be described with reference to FIG. In the first separation region 2 forming the cyclone, the vortex is generated in the fluid to be processed that is fed in the tangential direction from the inlet as in the first embodiment, and the foreign matter is separated by the centrifugal force generated by the swirling, The separated foreign matter falls by gravity along the inner peripheral surface of the cylindrical container and is periodically discharged out of the cylindrical container via the on-off valve 10 and the blow pipe 11. The to-be-processed fluid from which the foreign matter has been separated enters the second separation region 3 through the communication flow path 5, and the remaining foreign matter is separated and removed by the secondary separator 6 provided in this region. The secondary separator 6 in this embodiment forms a coil spring filter, and the fluid to be treated that has risen from the communication flow path 5 passes through a small gap from the outer periphery of the coil spring filter and traps foreign matter in the small gap. .

The trapped foreign matter temporarily stops the separation operation, and forcibly backflows the fluid to be processed while expanding the coil spring using the link mechanism installed in the coil spring filter, thereby washing the coil spring filter. The foreign matter being cleaned is put in a reverse flow and stored on the upstream side of the on-off valve 10 from the inner peripheral surface of the secondary separator through the cyclone lower end 64. The to-be-processed fluid from which the foreign matters are separated is sent out of the cylindrical container through the outlet pipe 8 and reused. Also in this embodiment, the residence time in the cylindrical container is kept long for filtration separation so that the fluid to be treated passes through the two separation regions.

  In response to a request to continue the operation of the two-stage separator without stopping for maintenance or the like, a second on-off valve is provided at the end of the blow pipe 11, the on-off valve 10 is closed, and the second on-off If the valve is opened, the foreign matter settled in the blow pipe 11 can be discharged to the outside while continuing the operation.

Is a longitudinal sectional view of Example 1 of the two-stage separator, Is an end view taken along line XX in FIG. These are the longitudinal cross-sectional views of Example 2 of a two-stage separator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cylindrical container 2 ... 1st isolation | separation area | region 3 ... 2nd isolation | separation area | region 4 ... Cylindrical partition 5 ... Communication flow path 6 ... Secondary separator 61 ... Outlet 62 ..Inlet 63..Communication flow path 64..Cyclone lower end 7 ... Inlet pipe 8 ... Outlet pipe 9 ... Gap 10 ... Open / close valve 11 ... Blow pipe

Claims (5)

  The fluid to be treated is introduced into the first classification region defined by the cylindrical partition wall, swirled along the inner peripheral wall, and the foreign matter in the fluid to be treated is centrifuged by a cyclone. A two-stage separation method characterized by being guided to a second separation region through a path and separating and removing residual foreign matters in the fluid to be treated by a secondary separator installed in the second separation region .   A cylindrical partition that divides the inside of the cylindrical container into a first separation region and a second separation region, an inlet pipe that introduces a fluid to be treated into the first separation region, and a first separation disposed below the cylindrical partition A communication channel that communicates the region with the second separation region, an outlet pipe for the fluid to be treated provided at the top of the second separation region, a blow tube provided at the bottom of the cylindrical container via an on-off valve, and And a secondary separator installed inside the second separation region, wherein the fluid to be treated is swung along the inner circumference of the cylindrical container in the course of passing through the first separation region, and foreign matter in the fluid to be treated is removed from the cyclone. And the remaining foreign matter in the processed fluid is separated and removed by the secondary separator by guiding the processed fluid from the communication channel to the second separation region. Stage separation device.   The two-stage separation according to claim 2, wherein the secondary separator installed in the second separation region is a cyclone separator, and the cyclone separator is disposed on an axis in a cylindrical partition wall. apparatus.   The secondary separator installed in said 2nd isolation | separation area | region was made into the coil filter, and the adhering foreign material was cleaned by the expansion of a coil spring, The two of Claims 2 thru | or 3 characterized by the above-mentioned. Stage separation device.   The gap between the lower end of the cyclone separator installed in the second separation region and the lower end of the cylindrical container is determined to be 15% of the introduction flow rate of the fluid to be processed. The two-stage separator according to claim 1.

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