CN108623118A - A kind of continuous exhaust pneumatic wallop, the backwash of interval deslagging band three phase separator - Google Patents

Abstract

A kind of continuous exhaust pneumatic wallop disclosed by the invention, the backwash of interval deslagging band three phase separator, belong to filtering separation device technical field, including cylinder, being horizontally disposed in cylinder has feed pipe, it is solid-liquor separation part below feed pipe, it is equipped with annular filter screen in the bottom cavity of solid-liquor separation part, backwash mechanism and leakage fluid dram are equipped on the corresponding cylinder body outer wall of screen location；The lower section of solid-liquor separation part is equipped with interval slagging mechanism.When annular filter screen is blocked, you can blown to inner barrel by backwash mechanism, the residue on annular filter screen is blown off, realizes the regeneration of annular filter screen, ensure that the continuous operation of equipment, to realize continuous exhaust pneumatic wallop.Solid residue is pushed down by loosening spiral, then is opened by the interruption of upper lower valve, the intermittent discharge of material residue is controlled, material residue is not in squeeze to reunite, and effectively prevents the phenomenon that pressure of inner barrel increased dramatically, stable equipment operation.

Description

A three-phase separator with continuous exhaust, intermittent slag discharge and backwash

technical field

The invention belongs to the technical field of filtration and separation equipment, and in particular relates to a three-phase separator with continuous exhaust, intermittent slag discharge and backwashing.

Background technique

With the improvement of people's living standards, the scale of urban sewage construction in the country has developed rapidly. Sludge is a by-product of sewage treatment. Every 10,000 tons of sewage treated produces an average of 5.6 tons of wet sludge with a moisture content of 80%. In 2016, the output of urban sludge Exceeded 40 million tons. Supercritical water oxidation technology uses supercritical water (Tc≥374.95℃, Pc≥22.064MPa) as a reaction medium to treat municipal sludge as an environmental protection technology, which can completely realize the harmlessness of municipal sludge. In the process of supercritical water oxidation of municipal sludge, small molecular gases such as CO ₂ and N ₂ will be generated. Municipal sludge itself also contains inorganic substances such as gravel and clay. The product of supercritical water oxidation of municipal sludge is separated into gas-liquid-solid three-phase after decompression, so it is necessary to separate the gas phase, liquid phase and solid phase.

In the existing patent technology, the patent ZL201620184557.X is known. This patent proposes a three-phase separation device under pressure. It has a cylinder with a spray pipe in the middle of the cylinder and a gas-liquid separation part above it. The lower part is the liquid-solid separation part. A filter is installed in the middle of the equipment to separate the liquid and solid. The bottom of the equipment is equipped with a spiral blade, which plays the role of sealing and solid phase residue discharge.

In the existing patent technology, the patent ZL201620185011.6 is known. This patent proposes a three-phase separation device under pressure. It has a filter cavity and a motor arranged on the top of the filter cavity. The upper end of the cavity wall is provided with a feed inlet, a filter screen is provided inside the filter cavity, and a clear liquid outlet is provided outside the filter screen, and a drive rod driven by a motor is provided at the central axis of the filter cavity. There are several electric scrapers, and the bottom of the driving rod is equipped with two-stage spiral blades; a vertical discharge pipe is provided at the bottom of the filter cavity, and a discharge port is provided at the bottom of the vertical discharge pipe. Equipped with a liquid-solid rotary seal valve.

These prior art solutions are not entirely satisfactory, because there is pressure inside the cavity, the slag discharge screw at the bottom and the rotary sealing valve will leak, affecting the stability of equipment operation. Simultaneously, if filter screen clogging occurs when the solution of above-mentioned prior art is used, can only rely on scraper to clean the filter residue inside, if the aperture of filter screen is blocked, it will cause equipment to stop running. Furthermore, the solid residue removal part is only a vertical discharge pipe, and the space is narrow. When there is too much slag, it is easy to squeeze and agglomerate, which will cause the internal pressure of the vertical discharge pipe cavity to increase, and the discharge pipe at the bottom will Slag spiral blades and rotary sealing valves will leak, which will affect the stability of equipment operation.

Contents of the invention

In order to overcome the defects in the above-mentioned prior art, the object of the present invention is to provide a three-phase separator with continuous exhaust, intermittent slagging and backwashing, which can realize the regeneration of the filter screen and intermittent slagging, Ensure the normal operation of the equipment.

The present invention is achieved through the following technical solutions:

The invention discloses a three-phase separator with continuous exhaust, intermittent slag discharge and backwashing. It is a gas-liquid separation part that can be exhausted, and the liquid-solid separation part is below; the bottom cavity of the liquid-solid separation part is provided with an annular filter screen that is coaxial with the cylinder, and an exhaust air filter is provided on the outer wall of the cylinder outside the annular filter screen. Liquid port and backwash mechanism; Intermittent slag discharge mechanism is provided under the liquid-solid separation part. The intermittent slag discharge mechanism includes a buffer bin and a slag discharge bin located below the buffer bin. An upper valve is installed at the connection between the buffer bin and the slag discharge bin. , there is a lower valve under the slag discharge bin, and the upper valve and the lower valve are opened alternately;

There is a motor on the top of the cylinder, and a rotating shaft that runs through the cylinder and the buffer bin is fixed under the motor. The rotating shaft is driven by the motor to rotate. The rotating shaft is located on the shaft section of the liquid-solid separation part where the annular filter screen is located. The shaft section of the buffer bin is provided with a loosening screw. When the rotating shaft rotates, it can drive the scraping brush and the loosening screw to rotate. When the scraping brush rotates, it can brush off the solid residue on the ring filter, and the brushed solid residue will fall into the buffer bin.

Preferably, the backflushing mechanism includes a backflush fluid inlet, a check valve is installed at the backflush fluid inlet, and a regulating valve arranged on the drain port, when the backflush fluid inlet is connected to the backflush fluid through an external fluid supply device When blowing fluid, the regulating valve is closed.

Preferably, the gas-liquid separation part includes an exhaust port, an air supply port and a pressure sensor interface arranged above the cylinder, the exhaust valve installed on the exhaust port is interlocked with the pressure of the pressure sensor interface, and the air supply valve installed on the air supply port is connected to the pressure sensor interface. Sensor interface pressure interlock.

Further preferably, a wire mesh demister for blocking liquid droplets is also provided in the chamber of the gas-liquid separation part.

Preferably, the cavity volume of the gas-liquid separation part is 10 to 15 times the volume of the buffer bin, and the volume of the buffer bin is greater than that of the slag discharge bin.

Preferably, the pressure inside the three-phase separator is maintained at 0.4±0.05 MPa, and the pressure of the backwash fluid introduced by the backwash mechanism is 0.2-0.3 MPa higher than the pressure inside the three-phase separator.

Preferably, it also includes a liquid level gauge for monitoring the liquid level inside the cylinder, and the two ends of the liquid level gauge are respectively connected to the upper interface of the liquid level gauge on the cylinder wall below the feed pipe and the cylinder above the annular filter. The lower interface of the liquid level gauge on the wall is connected.

Preferably, a differential pressure sensor is also included for monitoring the differential pressure of the annular cavity formed between the annular filter screen and the wall of the barrel body.

Preferably, the scraping brush is 3-5 mm away from the annular filter screen; the loosening screw is 20-30 mm away from the side wall of the buffer bin.

Preferably, the feed pipe is arranged at the upper position in the middle of the barrel, and is triangularly fixed to the inner wall of the barrel.

Compared with the prior art, the present invention has the following beneficial technical effects:

The three-phase separator disclosed by the invention divides the cylinder body into upper and lower parts through a feed pipe arranged in the cylinder body, the upper part is a gas-liquid separation part, and the lower part is a liquid-solid separation part. The liquid-solid separation part is equipped with an annular filter, and the cylinder where the annular filter is installed is equipped with a backwashing mechanism. When the annular filter is blocked, air can be blown into the cylinder through the backwashing mechanism to remove The residue is blown off to realize the regeneration of the ring filter and ensure the continuous operation of the equipment. Below the liquid-solid separation part, there is an intermittent slag discharge mechanism consisting of a buffer bin and a slag discharge bin. The solid residue is pushed down by loosening the screw, and then the intermittent discharge of the slag is controlled by the intermittent opening of the upper and lower valves. There will be extrusion agglomeration, which effectively avoids the phenomenon that the pressure inside the cylinder increases sharply, and the equipment operates stably. It can be seen that the structural setting of the three-phase separator is reasonable, which can stabilize the system pressure and realize automatic positive and negative flushing of the filter screen at the same time.

Further, the backflushing machine washing mechanism includes a backflush fluid inlet arranged on the outer wall of the cylinder, and a check valve is also arranged at the backflush fluid inlet, and the check valve prevents the high-pressure gas from being blocked by the residue on the filter to return. At the same time, a regulating valve is installed on the liquid discharge port. When the backflushing fluid inlet is passed into the backflushing fluid, the regulating valve is closed, and the high-pressure fluid will not overflow from the liquid discharge port, so that the impact force of the high-pressure fluid on the filter screen can be rapidly increased. Blow off the solid residue on the filter to realize the regeneration of the filter.

Further, the gas-liquid separation part above the feed pipe includes an exhaust port, an air supply port and a pressure sensor interface on the top of the cylinder. The exhaust valve installed on the exhaust port is interlocked with the pressure sensor interface. The pressure interlocking between the air valve and the pressure sensor interface can effectively ensure the stability of the pressure in the three-phase separator, thereby improving the stability of the system function.

Furthermore, the cavity volume of the gas-liquid separation part is 10 to 15 times the volume of the buffer bin, and the volume of the buffer bin is larger than the volume of the slag discharge bin, which can temporarily store more solid residues and does not need to discharge the slag in real time. It saves a lot of time for the staff, and the staff can open the upper and lower valves at intervals to discharge the slag. At the same time, the opening time interval of the upper valve is determined by the flow rate of the feed pipe, and the opening time of the upper valve is determined for different slag output.

Furthermore, there is also a liquid level gauge on the side wall of the cylinder, which can monitor the liquid level inside the cylinder in real time, and judge whether the filter is blocked by the liquid level, and then turn on the backwashing mechanism.

Further, a differential pressure sensor is also included for monitoring the differential pressure of the annular cavity formed between the annular filter screen and the wall of the barrel body. Feedback whether the annular filter screen is clogged through the indication value of the pressure difference, and then turn on the backwashing mechanism.

Further, the pressure inside the three-phase separator is maintained at 0.4±0.05MPa, and the pressure of the backwash fluid introduced by the backwash mechanism is 0.2-0.3MPa higher than the pressure inside the three-phase separator.

Description of drawings

Fig. 1 is the structural representation of the three-phase separator of continuous exhaust, intermittent slagging band backwash of the present invention;

Figure 2 is a schematic diagram of the connection between the fixed frame and the rotating shaft;

Fig. 3 is a schematic diagram of the positions of the feed pipe and the rotating shaft.

Among them, 1 is the motor; 2 is the reducer; 3 is the air supply port; 4 is the safety valve interface; 5 is the wire mesh demister; 6 is the feed pipe; 7 is the nozzle; 8 is the rotating shaft; 10 is a check valve; 11 is an annular strainer; 12 is a loose screw; 13 is a buffer warehouse; 14 is an upper valve; 15 is a lower valve; 16 is a slag discharge bin; 17 is a liquid discharge port; 20 is the wiper; 21 is the lower interface of the liquid level gauge; 22 is the cylinder; 23 is the upper interface of the liquid level gauge; 24 is the triangle fixing; 25 is the exhaust port; 26 is the pressure sensor interface.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

As shown in Figures 1 to 3, a three-phase separator with continuous exhaust, intermittent slag discharge and backwashing disclosed by the present invention includes a cylinder 22, and a motor 1, a reducer 2, and a motor 1 are installed above the cylinder 22. 1 Connect the rotating shaft 8 through the reducer 2 to drive the rotating shaft 8 to rotate. The rotating shaft 8 is arranged on the central axis of the cylinder 22. The upper middle part of the cylinder 22 is provided with a feeding pipe 6. The feeding pipe 6 is a liquid containing gas and solid impurities. At the inlet, there are several nozzles 7 on the wall of the feed pipe 6. The feed pipe 6 arranged horizontally divides the cylinder into upper and lower parts. The upper part of the feed pipe 6 is the gas-liquid separation part. Below is the liquid-solid separation part, the bottom cavity of the liquid-solid separation part is provided with an annular filter screen 11 coaxial with the cylinder body 22, and the outer wall of the cylinder body 22 outside the annular filter screen 11 is provided with a liquid discharge port 17 and a reverse Flushing mechanism; there is also an intermittent slag discharge mechanism under the liquid-solid separation part.

The gas-liquid separation part includes an exhaust port 25, an air supply port 3 and a pressure sensor interface 26 arranged above the cylinder body 22, and a wire mesh demister 5 for blocking liquid droplets is also provided in the cavity of the gas-liquid separation part. The gas overflowing from the liquid is discharged from the exhaust port 25 after passing through the wire mesh demister 5, and the remaining liquid phase and solid phase fall into the liquid-solid separation part that falls to the bottom. The exhaust valve installed on the exhaust port 25 is pressure interlocked with the pressure sensor interface 26, and the air supply valve installed on the air supply port 3 is pressure interlocked with the pressure sensor interface 26, which can effectively ensure the stability of the pressure in the device, thereby improving the system Functional stability.

The intermittent slag discharge mechanism includes a buffer bin 13, a slag discharge bin 16 located below the buffer bin 13, a loose screw 12 is provided in the buffer bin 13, an upper valve 14 is provided above the slag discharge bin 16, and a lower valve 15 is provided below , During use, the upper valve 14 and the lower valve 15 are alternately opened. Preferably, the opening time interval of the upper valve 14 is determined according to the flow rate of the feed pipe 6. When the flow rate is large, the opening time interval of the upper valve 14 is shorter, and when the flow rate is small, the opening time interval of the upper valve 14 is longer.

The annular filter screen 11 in the cavity of the liquid-solid separation part is fixed on the inner wall of the cylinder 22, the rotating shaft 8 runs through the cylinder 22 and the buffer chamber 13, and the rotating shaft 8 is fixed to the cylinder 22 through the fixing frame 19, as shown in Figure 2 . Rotary shaft 8 is located at the shaft section of the liquid-solid separation part corresponding to the position of annular filter screen 11. A number of scrapers 20 are arranged. Motor 1 drives rotary shaft 8 to rotate through reducer 2, and drives scraper brushes 20 to scrape off the slag on the surface of filter screen 11. , it can fully meet the needs when there is less material slag. Preferably, the number of scrapers 20 is 4-6, and the distance between the scrapers 20 and the filter screen 11 is 3-5 mm.

The slag inside the annular filter screen 11 is scraped off by the scraper 20 and enters the buffer bin 13 for buffering. The rotating shaft 8 is located on the shaft section of the buffer bin 13 and is provided with a loosening screw 12. The loosening screw 12 plays a stirring role and pushes the solid residue downward. Movement to prevent solid residue from accumulating and blocking the equipment. By opening the upper valve 14, the slag in the buffer bin 13 falls into the slag discharge bin 16, and the lower valve 15 is opened to discharge the slag. Preferably, the distance between the loosening screw 12 and the side wall in the buffer bin 13 is 20-30mm, which is conducive to the rotational movement of the loosening screw 12. The loosening screw can effectively avoid the pressure of the residue on the upper valve to loosen the residue in the buffer bin. The loosening screw 12 is preferably a shaftless screw.

The backflushing mechanism includes a backflush fluid inlet 9, which is arranged on the outer wall of the cylindrical body 22 corresponding to the position of the annular filter screen 11, and a check valve 10 is also arranged at the backflush fluid inlet 9, and the check valve 10 prevents The high-pressure gas is blocked by the residue on the annular filter screen 11 and returns. The backflush fluid inlet 9 is externally connected to the gas supply equipment, and the annular filter screen 11 is regenerated by the backflush gas. The backflush gas is preferably air, or other gases with pressure on site. At the same time, a regulating valve 18 is also provided on the liquid discharge port 17, and when the backflushing fluid inlet 9 is passed into the backflushing fluid, the regulating valve 18 is closed.

More preferably, the pressure inside the three-phase separator of the present invention is usually maintained at 0.4±0.05 MPa, and the pressure of the backflush gas is 0.2-0.3 MPa higher than the internal pressure of the three-phase separator. The space of the gas-liquid separation part on the upper part of the three-phase separator is 10 to 15 times, preferably 15 times, the volume of the buffer storehouse 13 .

The volume of the buffer bin 13 is greater than that of the slag discharge bin 16. Preferably, the volume of the buffer bin 13 is 1.5 to 2 times the volume of the slag discharge bin 16. It can temporarily store more solid residues, and does not need to discharge the slag in real time. It can be used for The staff saves a lot of time, and the staff can open the upper and lower valves at intervals to discharge the slag.

Preferably, it also includes a liquid level gauge for monitoring the height of the liquid level inside the cylinder body 22, and the two ends of the liquid level gauge are respectively connected to the liquid level gauge upper interface 23 and the annular filter that are provided on the cylinder wall near the feed pipe 6. The lower interface 21 of the liquid level gauge at the cylinder wall above the net 11 is connected.

The three-phase separator with continuous exhaust, intermittent slagging and backwashing of the present invention, when in use:

The material enters the three-phase separator through the feed pipe 6 through the nozzle 7, and the overflow gas passes through the wire mesh demister 55 and is discharged from the exhaust port 25, and the remaining liquid and solid phases fall into the liquid-solid phase below the feed pipe 6. Separation part: the liquid phase and solid phase are separated by the action of pressure difference, the liquid phase is discharged from the liquid discharge port 17 through the regulating valve 18, and the solid residue is enriched on the surface of the annular filter screen 11, and the motor 1 drives the reducer 2 after deceleration Drive the rotating shaft 8 to rotate, drive the scraper 20 above to brush the residue into the buffer bin 13, after a period of time, open the upper valve 14, the dregs in the buffer bin 13 will fall into the slag discharge bin 16, close the upper valve 14. Open the lower valve 15 to discharge slag.

Two kinds of monitoring modes are arranged during the backwashing work of the present invention:

The first monitoring method is to monitor through the liquid level gauge. When the liquid level gauge detects that the liquid level inside the three-phase separator is too high, it means that the blockage is serious. At this time, the regulating valve 18 is closed, and the high-pressure fluid passes through the backflush fluid inlet 9 and The check valve 10 enters into the ring filter screen 11, and the ring filter screen 11 is regenerated.

The second monitoring method is to monitor by a differential pressure sensor. When the pressure difference between the internal pressure of the three-phase separator cavity and the annular cavity formed between the annular filter screen 11 and the body wall of the cylinder 22 reaches 0.2 MPa, It shows that the ring filter screen 11 is seriously blocked. At this time, the regulating valve 18 is closed, and the high-pressure fluid enters the ring filter screen through the backflush fluid inlet 9 and the check valve 10, and the ring filter screen 11 and the ring filter screen 11 are regenerated.

Claims (10)

1. a three-phase separator of continuous exhaust, intermittent slagging band backwash, is characterized in that, comprises cylinder (22), is provided with feed pipe (6) in cylinder body (22), feed pipe ( 6) There are several nozzles (7) on the pipe wall, the upper part of the feed pipe (6) is the gas-liquid separation part capable of exhausting, and the lower part is the liquid-solid separation part; the bottom cavity of the liquid-solid separation part is provided with a cylinder Body (22) coaxial annular filter screen (11), is provided with drain port (17) and backwashing mechanism on the cylindrical body (22) outer wall of annular filter screen (11) outside; An intermittent slagging mechanism is provided below the liquid-solid separation part, and the intermittent slagging mechanism includes a buffer bin (13) and a slagging bin (16) located below the buffer bin (13). Between the buffer bin (13) and the slagging bin ( 16) An upper valve (14) is provided at the connection, and a lower valve (15) is provided below the slag discharge bin (16), and the upper valve (14) and the lower valve (15) are opened alternately; A motor (1) is provided on the top of the cylinder (22), and a rotating shaft (8) passing through the cylinder (22) and the buffer bin (13) is fixedly connected under the motor (1), and the rotating shaft (8) is driven by the motor (1) Rotate, the rotating shaft (8) is located on the shaft section of the liquid-solid separation part where the annular filter screen (11) is located. When the rotating shaft (8) rotates, it can drive the scraper (20) and the loose screw (12) to rotate. When the scraper (20) rotates, it can brush off the solid residue on the annular filter screen (11), and the solid residue that is brushed off falls into the In the buffer bin (13). 2. The three-phase separator with continuous exhaust and intermittent slagging with backwash according to claim 1, characterized in that, the backwash mechanism includes a backflush fluid inlet (9), a backflush fluid inlet (9) A check valve (10) is installed at the place, and a regulating valve (18) arranged on the liquid discharge port (17) is also included. Valve (18) is closed. 3. The three-phase separator with continuous exhaust and intermittent slagging with backwash according to claim 1, characterized in that the gas-liquid separation part includes an exhaust port (25) arranged above the cylinder (22), The air supply port (3) and the pressure sensor interface (26), the exhaust valve installed on the exhaust port (25) is in pressure interlock with the pressure sensor interface (26), the air supply valve installed on the air supply port (3) and the pressure sensor interface (26) PRESSURE CHAIN. 4. the three-phase separator of continuous exhaust according to claim 3, intermittent slagging band backwash, is characterized in that, in the chamber of gas-liquid separation part, also be provided with the wire mesh demister ( 5). 5. The three-phase separator with continuous exhaust and intermittent slagging band backwashing according to claim 1, wherein the cavity volume of the gas-liquid separation part is 10 to 15 times the volume of the buffer bin, and the buffer bin ( 13) is greater than the volume of the slagging bin (16). 6. The three-phase separator with continuous exhaust, intermittent slagging and backwashing according to claim 1, characterized in that the pressure inside the three-phase separator is maintained at 0.4±0.05MPa, and the backwashing mechanism feeds The pressure of the backwash fluid is 0.2-0.3MPa higher than the pressure inside the three-phase separator. 7. The three-phase separator with continuous exhaust and intermittent slagging with backwashing according to claim 1, further comprising a liquid level gauge for monitoring the liquid level inside the cylinder (22), the liquid level The two ends of the gauge are respectively connected with the liquid level gauge upper interface (23) opened on the cylinder wall below the feed pipe (6) and the liquid level gauge lower interface (21) opened at the cylinder wall above the annular filter screen (11) . 8. The three-phase separator with continuous exhaust, intermittent slagging and backwashing according to claim 1, characterized in that it also includes a differential pressure sensor for monitoring the annular filter screen (11) and the cylinder (22) The pressure difference in the annular cavity formed between the body walls. 9. The three-phase separator with continuous exhaust and intermittent slagging with backwashing according to claim 1, characterized in that the distance between the scraper (20) and the annular filter (11) is 3-5mm; the loosening screw (12) 20-30 mm away from the side wall of the buffer bin (13). 10. The three-phase separator with continuous exhaust, intermittent slagging and backwashing according to claim 1, characterized in that the feed pipe (6) is arranged at the upper middle of the cylinder (22), and (22) Inner wall triangle is fixed.