Filtering and purifying system

Abstract

The utility model belongs to the technical field of filtration, and relates to a filtration and purification system which comprises a raw material tank, a heater, a filter, a filter element, a cleaning liquid circulating tank and a filter residue collector. The filter comprises an upper shell and a lower shell, the upper shell is connected with a backwashing air inlet pipeline, and heaters are arranged outside the raw material tank and the filter; the lower shell is connected with an inflow port of the filter residue collector, the upper shell is connected with an outflow port of the filter residue collector, and a cleaning liquid circulating tank is arranged on a pipeline for connecting the upper shell with the outflow port of the filter residue collector. The cleaning liquid circularly scours the surface of a filter element of the filter from top to bottom, high-pressure gas is intermittently introduced into the permeation side to form bubble flow, and the bubble flow not only has a backwashing effect under the action of high pressure, but also forms airflow brush along with the circulating liquid to scour the filter element; the online regeneration effect is enhanced, the problems of filter element pore channel blockage and surface adhesion when high-viscosity liquid is filtered are effectively solved, and meanwhile, the filter residue collector is additionally arranged on the circulating pipeline, so that filter residues are conveniently collected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the filtration technical field, especially a filter purification system. BACKGROUND

[0002] Coal tar, catalytic slurry and ore slurry have an important position in industrial applications as high solid content viscous liquid. For example, clean slurry can be obtained by filtering the catalytic slurry to remove catalyst powder, which can be used for high value-added products such as carbon black or rubber filler, needle coke, carbon fiber, etc. Not only can it improve the utilization rate of resources, but also reduce the pollution to the environment. However, the flow properties of high solid content viscous liquid are greatly affected by the solid content, and the viscosity increases with the increase of solid particle content. The existence of solid particles increases the internal friction of the fluid, thereby affecting its rheological properties, which brings not small challenges to production and application. When dealing with high solid content viscous liquid, the selection of filtration technology needs to consider many factors, including the degree of medium blockage, viscosity, corrosion resistance and heat resistance, etc. High viscosity liquid often shows pseudoplastic behavior, that is, the apparent viscosity decreases with the increase of shear rate. At room temperature, the viscosity of the body fluid is very large, the filtration separation resistance is large, the efficiency is low, and usually the liquid needs to be heated to reduce the viscosity. Patent CN114870463A discloses a filter suitable for high viscosity medium and a filtering method thereof, and a back flushing component is arranged in the filter to automatically clean the filter and improve the service life of the filter, but the filter does not install a heater, and when high viscosity liquid enters the filter, the liquid cannot be guaranteed at a suitable filtration temperature, thereby affecting the filtration efficiency.

[0003] To ensure the stability and continuity of the filtration effect, the filter element will be back-flushed after a period of filtration to empty the solid particles intercepted in the filter. Patent CN213823686U discloses an ultra-high pressure high viscosity filter, which improves the filtration efficiency of high solid content viscous liquid through a series of structural design and use, but the filter lacks a back-flushing component, and the equipment cannot maintain long-term operation. The prior art has poor backwashing effect or high operation cost and complicated process during backwashing, which affects the production efficiency. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a filter purification system, a heater is installed outside the raw material tank and the filter, which effectively reduces the viscosity of the material; the cleaning pump after filtration circulates the cleaning liquid from top to bottom to flush the surface of the filter element of the filter, and intermittently introduces high pressure gas into the permeation measuring channel to form a bubble flow, which not only has a backwashing effect under high pressure, but also forms a gas flow brush with the circulating liquid to flush the filter element; the online regeneration effect is strengthened, the problem of filter element channel blockage and surface adhesion of high viscosity liquid during filtration is effectively solved, and a filter residue collector is additionally arranged on the circulating pipeline to facilitate the collection of filter residue.

[0005] In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] The filter purification system is shown as follows Figure 1 The filter (3) is provided with an upper shell (18), a lower shell (19) and a filter core (5), the filter core (5) is arranged in the lower shell (19), the lower shell (19) is connected with the raw material tank (1) through a pipeline, a feeding pump (4) is arranged on the pipeline between the lower shell (19) and the raw material tank (1), the upper shell (18) is connected with a backwashing air inlet pipeline, the raw material tank (1) and the filter (3) are both externally provided with a heater (2); the filter lower shell (19) is connected with an inflow of a filter residue collector (8) through a pipeline, the filter upper shell (18) is connected with an outflow of the filter residue collector (8) through a pipeline, a cleaning pump (6) and a cleaning liquid circulating tank (7) are sequentially arranged on the pipeline connecting the filter upper shell (18) with the outflow of the filter residue collector (8).

[0007] The utility model is further provided with a tube plate arranged between the filter upper shell (18) and the lower shell (19), a connecting port is arranged on the tube plate, pressure gauges are arranged on the shells on both sides of the tube plate, backwashing is performed when the pressure difference between both sides of the tube plate reaches a set value; the filter core (5) is closed at the bottom end and is provided with a connecting head matched with the connecting port at the top end, the connecting head is in sealed connection with the tube plate, and the connecting head is used for connecting both sides of the tube plate.

[0008] The utility model is further provided with a cleaning liquid inflow pipeline connected with the filter upper shell (18) and used for flushing the surface of the filter core (5) from top to bottom and from inside to outside, a cleaning liquid feeding valve (15) and a cleaning pump (6) are connected on the cleaning liquid inflow pipeline; the filter upper shell (18) is connected with a backwashing air inlet pipeline, a backwashing air inlet valve (12) and a flowmeter (13) are connected on the backwashing air inlet pipeline and used for intermittently introducing high-pressure gas into the permeation pressure side of the filter (3) during backwashing, forming a bubble flow and forming an air flow brush along with the circulating liquid.

[0009] The utility model is further provided with a feeding pipeline connected with the filter lower shell (19), a feeding pump (4) and a feeding valve (9) are arranged on the feeding pipeline, a filtrate outflow pipeline is connected with the filter upper shell (18), a discharging valve (10) is arranged on the filtrate outflow pipeline, an exhaust pipeline is connected with the filter upper shell (18), and a vent valve (11) is arranged on the exhaust pipeline.

[0010] The utility model further provides for, the filter lower casing (19) is connected with the filter residue collector (8) inflow through the pipeline, be equipped with the cleaning liquid discharge valve (14) on the connecting pipeline, the filter residue collector (8) is connected with the blow -off line and the residue discharge line respectively for collecting filter residue, be equipped with backflush valve (16) on the blow -off line, be equipped with residue discharge valve (17) on the residue discharge line.

[0011] The utility model further provides the use method of filter purification system, including the following steps:

[0012] When filtering, the heater (2) is opened, the raw material tank (1) and the filter (3) are heated, when the temperature reaches the set temperature, the feed pump (4), the feed valve (9) and the discharge valve (10) are opened, the raw material enters the filter lower casing (19), passes through the filter core (5) from outside to inside, the filter residue is intercepted on the outer surface of the filter core, and the filter cake is formed: the filtrate after filtering is discharged through the outflow pipeline; the thickness of the filter cake increases with the filtering time during filtering.

[0013] When backwashing, when the pressure difference displayed by the two pressure gauges on the filter (3) reaches 100-200kPa, the feed pump (4), the feed valve (9) and the discharge valve (10) are closed, the cleaning liquid feed valve (15), the cleaning liquid discharge valve (14) and the cleaning pump (6) are opened, the cleaning liquid flows into the lower casing (19) from the filter upper casing (18) through the filter core (5), continuously flushes the surface of the filter core (5), and the backwashing air inlet valve (12) is opened, high-pressure gas is intermittently introduced into the permeation side of the filter (3), a bubble flow is formed, the bubble flow not only has a backwashing effect under the action of high pressure, but also forms an air flow brush with the circulating liquid to flush the filter core; all filter residues backwashed are collected by the filter residue collector (8).

[0014] When collecting residues, the backflush valve (16) and the residue discharge valve (17) are opened, and other valves are closed, high-pressure gas is introduced to blow the filter residues collected by the filter residue collector (8) through the residue discharge pipeline.

[0015] The utility model further provides for, the raw material tank (1) and the filter (3) preferably control the heating temperature at 160-240 DEG C.

[0016] When the pressure difference between the two sides of the tube plate of the filter (3) reaches the set value 100-200kPa, backwashing is performed; and / or,

[0017] The backwashing air inlet flow rate is set to 10-1000L / min, and the interval of intermittent air inlet is 1-30s; and / or,

[0018] The backflush air inlet flow rate is set to 10-1000L / min; and / or,

[0019] The cleaning liquid is low hydrocarbon compound such as diesel oil, gasoline, petroleum ether, etc.

[0020] In summary, the utility model has the following beneficial effects:

[0021] (1) The raw material tank and the filter are provided with a heater, so that the temperature of the solid-containing high-viscosity liquid entering the filter is kept in a suitable working condition during filtration, preventing the solid-containing high-viscosity liquid from blocking the filter; during backwashing, the cleaning liquid is continuously heated during the circulation flushing of the filter element, so that the temperature of the cleaning liquid is continuously close to the filtration temperature of the solid-containing high-viscosity liquid, enhancing the backwashing effect;

[0022] (2) The utility model is provided with a backwashing device, the cleaning pump circulates the cleaning liquid from top to bottom to flush the surface of the filter element of the filter, and high-pressure gas is intermittently introduced into the permeation side to form a bubble flow, which not only has a backwashing effect under high pressure, but also forms an air flow brush with the circulating liquid to flush the surface of the filter element, thereby enhancing the online regeneration effect and effectively solving the problems of filter element channel blocking and surface adhesion of high-viscosity liquid during filtration;

[0023] (3) The utility model is provided with a filter residue collector, the filter residue discharged by backwashing is collected by the filter residue collector, and the filter residue is discharged by backblowing, facilitating the collection of the filter residue;

[0024] (4) The filter system of the utility model can be used repeatedly for a long time, and the equipment maintenance cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The utility model discloses a filter purification system structure schematic view;

[0026] 1-raw material tank, 2-heater, 3-filter, 4-feeding pump, 5-filter element, 6-cleaning pump, 7-cleaning liquid circulating tank, 8-filter residue collector, 9-feeding valve, 10-discharging valve, 11-vent valve, 12-backwashing air inlet valve, 13-flow meter, 14-cleaning liquid discharging valve, 15-cleaning liquid feeding valve, 16-backblowing valve, 17-discharge valve, 18-upper shell, 19-lower shell. DETAILED DESCRIPTION

[0027] The following will be further described in detail through specific embodiments:

[0028] In one embodiment, as Figure 1The filter purification system comprises a raw material tank (1), a heater (2), a filter (3), a feeding pump (4), a filter core (5), a cleaning pump (6), a cleaning liquid circulating tank (7) and a filter residue collector (8). The filter (3) is provided with an upper shell (18), a lower shell (19) and the filter core (5), the filter core (5) is arranged in the lower shell (19), the lower shell (19) is connected with the raw material tank (1) through a pipeline, the feeding pump (4) is arranged on the pipeline between the lower shell (19) and the raw material tank (1), the upper shell (18) is connected with a backwashing air inlet pipeline, the raw material tank (1) and the filter (3) are externally provided with the heater (2); the lower shell (19) of the filter is connected with an inlet of the filter residue collector (8) through a pipeline, the upper shell (18) of the filter is connected with an outlet of the filter residue collector (8) through a pipeline, the cleaning pump (6) and the cleaning liquid circulating tank (7) are sequentially arranged on the pipeline between the upper shell (18) of the filter and the outlet of the filter residue collector (8).

[0029] During the operation of the filter purification system, the heater (2) first heats the raw material catalytic slurry to reduce the viscosity, when the temperature reaches 200℃, the feeding pump (4), a feeding valve (9) and a discharging valve (10) are opened, the catalytic slurry enters the lower shell (19) of the filter, passes through the filter core (5) from outside to inside, the catalyst particles in the slurry are intercepted by the filter core (5) to form a filter cake on the surface, the thickness of the filter cake increases with the filtration time, and the filtrate flows out of the pipeline from the top end; when the pressure difference of the two pressure gauges on the both sides of the tube plate reaches 150kPa, the filter (3) is backwashed, the feeding pump (4), the feeding valve (9) and the discharging valve (10) are closed, the cleaning pump (6), a cleaning liquid feeding valve (15) and a cleaning liquid discharging valve (14) are opened, diesel oil flows into the upper shell (18) of the filter from top to bottom to continuously circulate and flush the surface of the filter core (5), the diesel oil is heated in the circulation process, and the temperature continuously approaches the slurry filtration temperature; meanwhile, the backwashing air inlet valve (12) is opened, 500L / min high-pressure nitrogen gas is intermittently introduced into the permeation pressure side of the filter (3) to form a bubble flow, the bubble flow not only has a backwashing effect under the action of high pressure, but also forms a gas flow brush with the circulating liquid to flush the surface of the filter core; the online regeneration effect is strengthened, the problems of filter core channel blockage and surface adhesion of high-viscosity liquid during filtration are effectively solved, and all the catalyst particles backwashed out are collected by the filter residue collector (8).

[0030] In the above embodiment, a tube plate is arranged between the upper shell (18) and the lower shell (19) of the filter, a connecting port is arranged on the tube plate, pressure gauges are arranged on the shells on the both sides of the tube plate, and backwashing is performed when the pressure difference displayed by the two pressure gauges reaches 150kPa; the bottom end of the filter core (5) is closed, a connecting head matched with the connecting port is arranged at the top end, the connecting head is in sealed connection with the tube plate, and the connecting head is used for connecting the both sides of the tube plate. Preferably, the filter cores of the filter and the filter residue collector are both sintered from stainless steel metal powder, and the filtration precision is 100μm.

[0031] In the above embodiment, the filter upper shell (18) is connected with a cleaning liquid inflow pipeline for flushing the filter element (5) from top to bottom and from inside to outside, the cleaning liquid inflow pipeline is connected with a cleaning liquid feeding valve (15) and a cleaning pump (6), when backwashing is performed, the cleaning liquid feeding valve (15) and the cleaning pump (6) are opened, diesel oil is circulated through the filter and is continuously heated, and the temperature approaches the filter temperature of the catalytic oil slurry.

[0032] In the above embodiment, the filter upper shell (18) is connected with a backwashing air inflow pipeline, the backwashing air inflow pipeline is connected with a backwashing air inflow valve (12) and a flow meter (13) for intermittently introducing 500L / min high-pressure nitrogen into the filter (3) from the permeation pressure side to form a bubble flow, the bubble flow not only has a backwashing effect under the action of high pressure, but also forms an air flow brush with the circulating liquid to flush the surface of the filter element.

[0033] In the above embodiment, the filter lower shell (19) is connected with an inflow pipeline, the inflow pipeline is provided with an inflow pump (4) and an inflow valve (9), the filter upper shell (18) is connected with a filtrate outflow pipeline, the filtrate outflow pipeline is provided with an outflow valve (10), the filter upper shell (18) is connected with an exhaust pipeline, the exhaust pipeline is provided with a vent valve (11), when the internal pressure of the filter (3) is too large, the vent valve (11) is opened to release the pressure in the filter.

[0034] In the above embodiment, the filter lower shell (19) is connected with a filter residue collector (8) through a pipeline, the connecting pipeline is provided with a cleaning liquid outflow valve (14), the filter residue collector (8) is respectively connected with a purging pipeline and a residue discharge pipeline, the purging pipeline is provided with a backpurging valve (16), and the residue discharge pipeline is provided with a residue discharge valve (17); the backpurging valve (16) is opened to blow out the filter residue collected in the filter residue collector (8).

[0035] The application further provides a use method of the above-mentioned filter purification system, please refer to Figure 1 , comprising the following steps:

[0036] During the filtration operation, the heater (2) is opened to heat the raw material tank (1) and the filter (3), when the temperature reaches 200℃, the inflow pump (4), the inflow valve (9) and the outflow valve (10) are opened, the raw material enters the filter lower shell (19), passes through the filter element (5) from outside to inside, and the catalyst particles are retained on the outer surface of the filter element (5) to form a filter cake; the filtered filtrate is discharged through the outflow pipeline; wherein the thickness of the catalyst particles increases with the filtration time.

[0037] When the pressure differential of the two sides of the tube sheet reaches 150 kPa during backwashing operation, the feed pump (4), the feed valve (9) and the discharge valve (10) are closed, the cleaning liquid feed valve (15), the cleaning liquid discharge valve (14) and the cleaning pump (6) are opened, the cleaning liquid flows into the lower shell (19) through the filter core (5) from the upper shell (18) of the filter, continuously flushing the surface of the filter core (5), at the same time, the backwashing air inlet valve (12) is opened, 500 L / min high-pressure nitrogen is intermittently introduced into the permeation pressure side of the filter (3), forming a bubble flow, the bubble flow not only has a backwashing effect under the action of high pressure, but also forms a gas flow brush with the circulating liquid to flush the surface of the filter core; the online regeneration effect is strengthened, the problems of filter core channel blockage and surface adhesion of high-viscosity liquid during filtration are effectively solved, and all the filter residues discharged during backwashing are collected by the filter residue collector (8).

[0038] During the residue collection operation, the blowback valve (16) and the residue discharge valve (17) are opened, and the other valves are closed, 500 L / min high-pressure nitrogen is introduced to blow the catalyst particles collected by the filter residue collector (8) through the residue discharge pipeline.

[0039] The content illustrated in the above examples should be understood as the examples only for more clearly illustrating the present application, and should not be used to limit the scope of the present application, after reading the present application, the modifications of various equivalent forms of the present application by the person skilled in the art all fall within the scope defined by the appended claims of the present application.

Claims

1. A filtration purification system characterized by The filter (3) is provided with an upper shell (18), a lower shell (19) and a filter core (5), the filter core (5) is arranged in the lower shell (19), the lower shell (19) is connected with the raw material tank (1) through a pipeline, the feed pump (4) is arranged on the pipeline between the lower shell (19) and the raw material tank (1), the upper shell (18) is connected with a backwashing air inlet pipeline, the raw material tank (1) and the filter (3) are both externally provided with a heater (2); the filter lower shell (19) is connected with the inflow of the filter residue collector (8) through a pipeline, the filter upper shell (18) is connected with the outflow of the filter residue collector (8) through a pipeline, the cleaning pump (6) and the cleaning liquid circulating tank (7) are sequentially arranged on the pipeline between the filter upper shell (18) and the outflow of the filter residue collector (8).

2. The filtration purification system of claim 1, wherein A tube plate is arranged between the filter upper shell (18) and the lower shell (19), a connecting port is arranged on the tube plate, and pressure gauges are arranged on the shells on both sides of the tube plate; the filter core (5) is closed at the bottom end and is provided with a connecting head matched with the connecting port at the top end, the connecting head is in sealed connection with the tube plate, and the connecting head is used for connecting the two sides of the tube plate.

3. The filtration purification system of claim 1, wherein The raw material tank (1) and the filter (3) are externally provided with a heater (2), the heater (2) is used for heating the filtered liquid, reducing the viscosity of the filtered liquid and effectively preventing the pipeline and the device from being blocked; during backwashing, the external heater (2) of the filter (3) can also heat the cleaning liquid.

4. The filtration purification system of claim 1, wherein The filter upper shell (18) is connected with a cleaning liquid inflow pipeline for flushing the filter core (5) from top to bottom and from inside to outside, the cleaning liquid inflow pipeline is connected with a cleaning liquid feed valve (15) and a cleaning pump (6); the filter upper shell (18) is also connected with a backwashing air inlet pipeline, the backwashing air inlet pipeline is provided with a backwashing air inlet valve (12) and a flow meter (13).

5. The filtration purification system of claim 1, wherein The filter lower shell (19) is connected with a feed pipeline, the feed pipeline is provided with a feed pump (4) and a feed valve (9), the filter upper shell (18) is connected with a filtered liquid outflow pipeline, the filtered liquid outflow pipeline is provided with a discharge valve (10), and the filter upper shell is connected with an exhaust pipeline, the exhaust pipeline is provided with a vent valve (11).

6. The filtration purification system of claim 1, wherein The filter lower shell (19) is connected with the inflow of the filter residue collector (8) through a pipeline, the connecting pipeline is provided with a cleaning liquid discharge valve (14), the filter residue collector (8) is respectively connected with a purging pipeline and a residue discharge pipeline, the purging pipeline is provided with a back flushing valve (16), and the residue discharge pipeline is provided with a residue discharge valve (17).

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