CN219440853U

CN219440853U - Candle type automatic filtering system

Info

Publication number: CN219440853U
Application number: CN202320245464.3U
Authority: CN
Inventors: 钱卫; 张政义
Original assignee: Nantong Upstar Filtering Equipment Co ltd
Current assignee: Nantong Upstar Filtering Equipment Co ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-08-01
Anticipated expiration: 2033-02-17

Abstract

The utility model belongs to the field of filtering equipment, and particularly discloses a candle type automatic filtering system. The candle type automatic filtration system mainly comprises a circulating pipeline, a liquid collecting pipeline, a forward blowing pipeline, a forward washing pipeline, a reverse blowing pipeline, a reverse flushing pipeline and a protection pipeline, wherein each important pipeline is provided with a special program control valve and is connected to different interfaces on the filter shell. The utility model eliminates the defects of manual cleaning of cloth bags, manpower waste and influence on productivity through a full-automatic control means, the filter element can be repeatedly used, a large number of filtering consumables are saved, the whole process is automatic without leakage, the accident risk is reduced, and the labor cost is saved; the pressure monitoring and emergency protection pressure relief are carried out on the pipeline through the components such as the pressure gauge, the pressure sensor, the rupture disk and the like, and the whole process is completely sealed and filtered without leakage and pollution.

Description

Candle type automatic filtering system

Technical Field

The utility model belongs to the technical field of filtering equipment, and particularly relates to a candle type automatic filtering system.

Background

The candle type filter is a novel advanced, safe, efficient and pollution-free filter mode, has the characteristics of high efficiency, energy conservation, high sealing, simple maintenance, safety, reliability, higher automation degree and the like, and can be widely applied to solid-liquid separation and filtration in industries such as petroleum, plastics, electroplating, chemical industry, ceramics, pharmacy, sugar manufacturing and the like.

The utility model discloses a candle filter as disclosed in application number CN202021556693.X, including the mount and install the jar body on the mount, the inlet has been seted up to jar body lateral part and is located the overflow mouth of inlet top, jar body top flange joint has the head, fixedly connected with mount pad in jar body top, linear array installs a plurality of filter cores on the mount pad, the filter core includes the cartridge filter of stiff end and airtight fixed connection on the stiff end, cartridge filter lower extreme fixedly connected with end cap, jar body top both sides are provided with the catheter respectively, be connected with a plurality of branch pipes that are linked together with each cartridge filter top between two catheters, two catheters outwards are connected with the drain pipe respectively, jar body top both sides are connected with just wash the pipe respectively, jar body bottom is provided with the scum pipe, be provided with the distributor in the scum pipe, the steam generator is compact structure, and a work is stable, filtration efficiency is high, filter effect is good, be convenient for wash.

However, the candle filter structure still needs to clean the filter element regularly, and the filter residues are broken to be easy to adhere to the surface of the metal filter element, so that the candle filter structure needs to be cleaned for many times, and is inconvenient. The whole automation degree of the equipment is not high, and many links need to be participated in manually. Meanwhile, the monitoring and protecting measures for the internal pressure of the equipment are obviously insufficient.

Disclosure of Invention

In order to solve the problems, the utility model adopts the following technical scheme:

a candle-type automatic filtration system comprising

The filter shell is of a hollow structure, a plurality of interfaces are respectively arranged at the top, the bottom and the shell body, an overflow port is arranged at the upper end of the interior, and a slag discharge port is arranged at the bottom;

the filtering mechanism is detachably suspended in the filtering shell and consists of a plurality of cloth bag type filter elements;

the top of the turbid liquid tank is communicated with the overflow port, and the bottom of the turbid liquid tank is also communicated to the inside of the filter shell;

one end of the circulating pipeline is communicated with the inside of the filtering mechanism, the other end of the circulating pipeline is communicated with the upper end of the turbid liquid tank, and a pipeline viewing mirror is arranged at the middle end of the circulating pipeline;

one end of the liquid collecting pipeline is communicated with the circulating pipeline, and the other end of the liquid collecting pipeline is communicated with the liquid collecting tank;

one end of the positive blowing pipe is communicated with an air source, and the other end of the positive blowing pipe is communicated with the top of the filter shell;

one end of the positive washing pipeline is communicated with a clean water source, and the other end of the positive washing pipeline is communicated with the lower end of the filter shell;

one end of the back-blowing pipeline is communicated with an air source, and the other end of the back-blowing pipeline is communicated with the inside of the filtering mechanism;

one end of the backwashing pipeline is communicated with a clean water source, and the other end of the backwashing pipeline is communicated with the inside of the filtering structure;

the protection pipeline is communicated to the top of the filter shell and is provided with a rupture disk;

the circulating pipeline, the liquid collecting pipeline, the forward blowing pipeline, the forward washing pipeline, the backward blowing pipeline, the backwashing pipeline and the protecting pipeline are all provided with special program control valves and are connected to different interfaces on the filter shell.

In some aspects, the bag filter is a multiple quincuncial structure.

In some aspects, the forward blowing conduit comprises a forward blowing inlet conduit and a forward blowing outlet conduit;

one end of the positive blowing air inlet pipeline is communicated with an air source, and the other end of the positive blowing air inlet pipeline is communicated with the top of the filter shell;

and one end of the forward blowing exhaust pipeline is communicated to the exhaust pipeline, and the other end of the forward blowing exhaust pipeline is connected to the top of the filter shell.

In some modes, the positive-blowing exhaust pipeline further comprises a branch air release pipeline, one end of the branch air release pipeline is communicated with the exhaust pipeline, the other end of the branch air release pipeline is communicated with the top of the filter shell, and the pipe diameter of an exhaust port of the branch air release pipeline is smaller than that of the positive-blowing exhaust pipeline.

In some aspects, the blowback duct includes a blowback intake duct and a blowback exhaust duct;

one end of the back-blowing air inlet pipeline is communicated with an air source, and the other end of the back-blowing air inlet pipeline is communicated with the inside of the filtering mechanism;

one end of the back-blowing exhaust pipeline is communicated to the inside of the filtering mechanism, and the other end of the back-blowing exhaust pipeline is communicated to the exhaust pipeline.

In some aspects, the forward wash conduit includes a forward wash liquid inlet conduit and a forward wash liquid outlet conduit;

one end of the forward washing liquid inlet pipeline is communicated with a clean water source, and the other end of the forward washing liquid inlet pipeline is communicated with the lower end of the filter shell;

one end of the positive washing liquid discharge pipeline is communicated to the bottom end of the filter shell, and the other end of the positive washing liquid discharge pipeline is communicated to the liquid discharge pipeline.

In some modes, the forward-washing liquid discharge pipeline further comprises a branch liquid discharge pipeline, one end of the branch liquid discharge pipeline is communicated to the bottom of the filter shell, the other end of the branch liquid discharge pipeline is communicated to the liquid discharge pipeline, and the liquid discharge port diameter of the branch liquid discharge pipeline is smaller than that of the forward-washing liquid discharge pipeline.

In some aspects, the backwash piping comprises backwash feed piping and backwash drain piping;

one end of the backwashing liquid inlet pipeline is communicated with a clean water source, and the other end of the backwashing liquid inlet pipeline is communicated with the inside of the filtering mechanism;

one end of the backwash drain pipe is communicated to the bottom end of the filter shell, and the other end of the backwash drain pipe is communicated to the drain pipe.

In some modes, a manual ball valve is further arranged on the protection pipeline.

In some aspects, a differential pressure transmitter is disposed between the tube of the turbid liquid tank connected to the filter housing and the liquid collecting tube.

The beneficial effects of the utility model are as follows:

the defects that manual cleaning of the cloth bag is needed, manpower is wasted, productivity is affected are overcome, the filter element can be used repeatedly, a large number of filtering consumables are saved, whole-process automation is free of leakage, accident risks are reduced, and labor cost is saved. The filtering precision is up to 0.5 μm. And (5) automatically controlling the whole filtering process. The filter is completely sealed without leakage and pollution. The filter element has a plum blossom structure, and has wide application range and good filtering effect. The method is suitable for materials with the impurity content of 0.1-20%, and can use the object with the impurity content of 35% at the highest in extreme cases to realize one-time complete filtration, and the water content of the recovered dry slag is less than 20%. Good maintainability, and convenient disassembly and transportation.

Drawings

FIG. 1 is a schematic front view of a candle-type automatic filtration system;

FIG. 2 is a top view of a candle-type automatic filtration system;

FIG. 3 is a bottom view of a candle-type automatic filtration system;

FIG. 4 is a schematic view of a filter mechanism in a candle-type automatic filter system;

fig. 5 is a piping structure diagram of the candle type automatic filtration system.

In the figure:

10. a filter shell; 20. a filtering mechanism; 30. a circulation pipe; 40. a liquid collecting pipeline; 50. a forward blowing pipeline; 51. a positive blowing air inlet pipeline; 52. a positive blowing exhaust duct; 60. a blowback pipeline; 61. back blowing the air inlet pipeline; 62. back-blowing an exhaust pipeline; 70. forward washing the pipeline; 71. a liquid inlet pipeline is positively washed; 72. a positive washing liquid discharge pipeline; 80. backwashing the pipeline; 81. backwashing a liquid inlet pipeline; 82. a backwash drain pipe; 90. protecting the pipeline;

VQ 0.0-inlet valve; VQ 0.1-exhaust valve; VQ 0.2-cycle valve; VQ 0.3-serum valve; VQ 0.4-positive intake valve; VQ 0.5-drain valve; VQ 0.6-blowback inlet valve; VQ 0.7-backwash feed valve; VQ 0.8-small vent valve; VQ 1.0-blowback bleed valve; VQ 1.1-1.5-sink valve; VQ 1.6-slag discharge valve; VQ 2.0-bottom feed valve; VQ 2.1-small drain valve; PAIW 48-pressure sensor; LI 0.0-tuning fork liquid level switch; SJ-01-pipeline sight glass; VA-01-rupture disc; VQ-01-manual ball valve; p-01-manometer; PID 105-differential pressure transmitter;

n1-positive air inlet; an N2-vent; n3-liquid level tuning fork switch port; n4.1-4.5-filter element port; n6-liquid outlet; n9-back-blowing air vent; n10-cleaning port; n13 is a slag discharge port; n16-small exhaust port.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

the candle type automatic filtering system comprises a main body which is a filtering shell 10, wherein a pressure sensor port, a rupture disc port, an exhaust port N2, a small exhaust port N16, a pressure gauge port, a positive air inlet N1, a liquid level tuning fork switch port N3 and a plurality of standby ports are formed in the top of the filtering shell 10. The upper part of the filter shell 10 is provided with a filter collecting port, and the bottom is provided with a liquid inlet, a cleaning port N10, a liquid outlet N6, a small liquid outlet and a slag discharging port N13. Other positions can be provided with related functional connectors as required. The filter shell 10 is of a hollow structure, and an overflow port is formed in the upper end of the inner part. The filter mechanism 20 is detachably suspended in the filter shell 10, the filter mechanism 20 is composed of five-arrangement bag-type filter elements, the filter elements are assembled and disassembled through a suspension frame and an installation piece which are arranged in the filter shell 10, the whole of the bag-type filter elements is of a double plum blossom structure, and the bag is in a shrugging state and can expand and release air in the follow-up process. One end of the cloth bag type filter element, which is arranged with the suspension frames, is a through end, each suspension frame is independent and smooth, five suspension frames are communicated to the same main port through different filter element ports N4.1-4.5 and collecting valves VQ 1.1-1.5, the main port is in butt joint with the filter collecting port, a plurality of special multi-branch pipelines are arranged outside the filter collecting port, and a plurality of collection ports are arranged on the multi-branch pipelines.

The slag discharge port N13 is provided with a special slag discharge valve VQ1.6 and a slag discharge door of an automatic control switch for discharging dry slag and slurry.

The system is also provided with a special air source with an air pump, a clear water source, a turbid liquid tank, a liquid collecting tank and a slag collecting tank.

The air source is provided with a pneumatic triple piece and a pump valve, and the air release of the air source execution pipeline is controlled in an auxiliary mode. The clean water source is provided with a pump body and a liquid inlet valve VQ0.0, and mainly provides cleaning liquid to execute the cleaning action of the system. The interior of the turbid liquid tank is provided with a turbid liquid to be filtered which is continuously or fixedly stored, the top of the turbid liquid tank is communicated with an overflow port, turbid liquid or semi-turbid liquid overflowed from the interior of the filter shell 10 to a designated height is reintroduced into the turbid liquid tank, the bottom of the turbid liquid tank is also connected with a liquid inlet at the bottom of the filter shell 10, the turbid liquid tank is provided with a pump valve, the turbid liquid is controllably conveyed into the filter shell 10, and the turbid liquid overflows from bottom to top and is immersed in the filter mechanism 20. The liquid collecting tank is mainly used for collecting filtered liquid. The slag collecting tank is used for collecting dry slag or slurry. And an overflow valve is arranged at the overflow port.

The system is divided into a circulation line 30, a liquid collection line 40, a forward blow line 50, a reverse blow line 60, a forward wash line 70, a backwash line 80 and a protection line 90 in total.

Wherein, one end of the circulating pipeline 30 is connected to the collecting and separating port on the multi-branch pipeline, and is connected to the inside of the filtering mechanism 20, and the other end is connected to the upper end of the turbid liquid tank. A special circulation valve VQ0.2 is arranged at the joint of the circulation pipeline 30 and the turbid liquid tank and is used for controlling the connection or disconnection of the circulation pipeline 30 and the turbid liquid tank, namely, the liquid in the circulation pipeline 30 can be controllably led into the turbid liquid tank. The circulating pipeline 30 is also provided with a special pipeline view mirror SJ-01 for observing the turbidity degree of the liquid in the circulating pipeline 30, preferably, a special visual sensor can be arranged at the position of the pipeline view mirror SJ-01 to automatically judge the clarity or turbidity of the liquid, and the subsequent pipeline continuous operation is matched.

One end of the liquid collecting pipeline 40 is connected to the circulating pipeline 30, and the other end of the liquid collecting pipeline is communicated with the liquid collecting tank. A special clear liquid valve VQ0.3 is arranged between the liquid collecting pipe 40 and the liquid collecting tank, and the filtered clear liquid which is split by the liquid collecting pipe 40 from the circulating pipe 30 is controllably led into the liquid collecting tank.

The forward blow pipe 50 includes a forward blow intake pipe 51 and a forward blow exhaust pipe 52. One end of the positive air inlet pipe 51 is communicated with an air source, and the other end is communicated with a positive air inlet N1 at the top of the filter shell 10. A special positive air inlet valve VQ0.4 is arranged between the positive air inlet pipeline 51 and the air source, and gas is controllably led into the filter shell 10 and blown from the top to the bottom. One end of the forward blowing exhaust pipe 52 is communicated to the exhaust port N2, and the other end is connected to the exhaust pipe. A dedicated exhaust valve VQ0.1 is provided on the forward blow-by gas duct 52 for controlling the opening and closing of the exhaust gas. The forward blowing exhaust pipe 52 is provided with an auxiliary branch exhaust pipe, one end of the branch exhaust pipe is communicated with the small exhaust port N16, the other end of the branch exhaust pipe is connected to the exhaust pipe, and a special small exhaust valve VQ0.8 is arranged for controlling the opening and closing of the small exhaust.

The blowback duct 60 includes a blowback intake duct 61 and a blowback exhaust duct 62. One end of the back-blowing air inlet pipeline 61 is communicated with an air source, the other end is connected with one collecting and separating port of the multi-branch pipeline in a butt joint mode, and the back-blowing air inlet pipeline 61 and the multi-branch pipeline are communicated into the filtering mechanism 20, and a back-blowing air inlet valve VQ0.6 is arranged between the back-blowing air inlet pipeline 61 and the multi-branch pipeline and used for controllably guiding air into the filtering mechanism 20. One end of the back-blowing exhaust pipeline 62 is communicated with a collection port on the multi-branch pipeline, the other end of the back-blowing exhaust pipeline is connected into an exhaust pipeline, and a special back-blowing air release valve VQ1.0 is arranged to control the discharge of back-blowing gas.

The forward washing pipe 70 includes a forward washing liquid inlet pipe 71 and a forward washing liquid outlet pipe 72. One end of the forward washing liquid inlet pipe 71 is communicated with a clean water source, and the other end is communicated with a washing port N10 at the lower end of the filter shell 10. The forward wash inlet pipe 71 is provided with a dedicated bottom inlet valve VQ2.0 for controlling the transfer of forward wash. One end of the forward washing liquid discharge pipeline 72 is connected to the liquid discharge port N6 at the bottom, the other end of the forward washing liquid discharge pipeline 72 is connected to a liquid discharge pipeline, and the forward washing liquid discharge pipeline 72 is provided with a special liquid discharge valve VQ0.5 for controlling the discharge of the cleaning liquid. The forward washing liquid discharge pipeline 72 is also provided with a special branch liquid discharge pipeline, one end of the branch liquid discharge pipeline is communicated with a small liquid discharge port at the bottom, the other end of the branch liquid discharge pipeline is connected with a liquid discharge pipeline, a special small liquid discharge valve VQ2.1 is arranged, and a small amount of discharge pressure of the cleaning liquid is controlled.

The backwash piping 80 includes a backwash feed piping 81 and a backwash drain piping 82. One end of the backwash feed pipe 81 is connected to a clean water source and the other end is connected to a collection port of a plurality of branch pipes and thereby to the interior of the filter mechanism 20. The backwash feed pipe 81 is provided with a backwash feed valve VQ0.7. The backwash drain 82 is connected to the forward wash drain 72 and shares a common drain line.

One end of the protection pipeline 90 is connected with the rupture disc port through the rupture disc VA-01, the other end of the protection pipeline is connected with the waste discharge pipeline, and the protection pipeline 90 is also provided with a special manual ball valve VQ-01, so that pressure relief can be controlled manually. The inside of the filter housing 10 is pressure-relieved by the rupture disk VA-01.

A special pressure sensor PAIW48 is provided at the pressure sensor port. The pressure gauge port is provided with a pressure gauge P-01. The liquid level tuning fork switch opening N3 is provided with a tuning fork liquid level switch LI0.0. The turbid liquid tank is connected with the pipeline of the filter shell 10 and the liquid collecting pipeline 40, one is a liquid inlet pipeline, the other is a liquid outlet pipeline, a differential pressure transmitter PID105 is arranged between the two pipelines, and the measured value is the differential pressure inside the filter shell 10. All valve bodies are program-controlled valves, related pipelines are opened and pipe walls, the valves are opened and the pipe walls and numerical values are monitored and measured, and after the numerical values reach a certain degree, the valves of some valve bodies are triggered to be automatically operated by a special PLC control system.

Working principle: and (5) introducing filtrate into the turbid liquid tank for storage or real-time input.

The pump operation of joining in marriage of turbid liquid jar is with waiting to filter liquid and is input into filter shell 10 from turbid liquid jar, and according to the process creep submergence filter mechanism 20 from bottom to top, liquid level tuning fork switch detects the liquid level, sends the signal, opens the overflow valve, and a part turbid liquid is led back to turbid liquid jar from filter shell 10 inside through the overflow mouth, and another part is through the primary filtration of filter mechanism 20, gets into the filter core inside the sack from filter shell 10 inside to in the condition that circulation valve VQ0.2 was closed, flows back to filter shell 10 inside again, and returns to turbid liquid jar together with other turbid liquids. In the process, a layer of precoat is formed on the surface of the cloth bag type filter element through primary filtration, and the precoat consists of impurities intercepted by the collision of the filter holes.

The collection valves VQ 1.1-1.5 and the circulation valve VQ0.2 are opened, the primary filtration liquid flowing back into the filter shell 10 before enters the circulation pipeline 30 from the corresponding collection ports on the multi-branch pipeline, and finally flows back to the turbid liquid tank. In the process, part of the turbid liquid is filtered continuously to remove impurities, and impurities contained in the whole turbid liquid are accumulated on the precoat layer to form a filter cake. The filter cake formed will trap finer impurities in the gas by bridging the gas that is subsequently introduced or is present in the filter housing 10. The liquid flowing in the circulation duct 30 will slowly change from cloudy to clear.

The clarity degree of the liquid in the circulating pipeline 30 is observed through a pipeline sight glass SJ-01, and after the filtering requirement is automatically judged, the circulating valve VQ0.2 and the overflow valve are closed. The whole liquid in the turbid liquid tank is clear after the primary filtration circulation, and the turbid liquid tank is only out and cannot enter. And opening a clear liquid valve VQ0.3, and allowing filtered clear liquid to enter a liquid accumulation pipeline and be conveyed to a liquid collection tank.

In the process, the pressure sensor, the pressure gauge P-01, the differential pressure transmitter PID105 and other parts continuously monitor the data such as the internal pressure of the filter shell 10. Along with the rise of the liquid level of the liquid collecting tank, the impurities at the filter cake are continuously increased and accumulated, the pressure in the filter shell 10 is continuously increased, when the pressure difference is monitored by the pressure difference transmitter PID105 to reach a critical value, the valve body matched with the turbid liquid tank is closed, no external liquid is introduced any more, the liquid in the filter shell 10 is continuously pumped from the liquid collecting pipeline 40 to the liquid collecting tank, most of the liquid in the filter shell is emptied, and the clear liquid valve VQ0.3 is closed.

And opening a valve body and a pump body matched with the clean water source, opening a bottom liquid inlet valve VQ2.0, and enabling clean water to enter the lower part of the filter shell 10 from the forward washing liquid inlet pipeline 71, and performing forward washing on the filter cake by dipping and overflowing from bottom to top. After a period of time of forward washing, the valve body and the pump body of the clean water source and the bottom liquid inlet valve VQ2.0 are closed. The pump body and the valve body matched with the air source, the positive air inlet valve VQ0.4 and the liquid discharge valve VQ0.5 are synchronously opened, air is sent downwards from the top of the filter shell 10 from the positive air inlet pipeline 51, and positive washing liquid is discharged from the positive washing liquid discharge pipeline 72. The branch drain may assist the forward wash drain 72 in draining a small amount of liquid or for pressure control purposes when the device is in operation.

After a period of forward blowing, the air source valve body and the pump body, the forward air inlet valve VQ0.4 and the liquid discharge valve VQ0.5 are closed, the slag discharge valve VQ1.6, the slag discharge door and the air discharge valve VQ0.1 are opened, and the internal air is discharged from the forward blowing air discharge pipeline 52 and the washed slurry is removed. The branch air discharge pipeline is similar to the branch liquid discharge pipeline in function, and auxiliary air discharge and micro-control of pressure are realized.

After the air is discharged, a slag discharging valve VQ1.6, a slag discharging door, an air discharging valve VQ0.1 and a small air discharging valve VQ0.8 are closed, an air source pump body, a valve body and a back blowing air inlet valve VQ0.6 are opened, back blowing air enters the filtering mechanism 20 from a back blowing air inlet pipeline 61, a cloth bag of the cloth bag type filter element is blown and expanded from inside to outside, and a filter cake is severely shredded or vibrated into small blocks in the process. The air source pump body and the valve body are closed, the back-blowing air inlet valve VQ0.6 is opened, the slag discharging valve VQ1.6, the slag discharging door and the back-blowing air outlet valve VQ0.1 are opened, and back-blowing air is discharged from the back-blowing air outlet pipeline 62 and dry slag filings are removed side by side.

After back flushing for a period of time, the slag discharging valve VQ1.6, the slag discharging door and the back flushing exhaust valve VQ0.1 are closed, the valve body and the pump body matched with the clean water source and the back flushing liquid inlet valve VQ0.7 are opened, and clean water enters the filter mechanism 20 from the back flushing liquid inlet pipeline 81 to back flush the filter element.

After backwashing for a period of time, a valve body, a pump body and a backwash liquid inlet valve VQ0.7 matched with a clean water source are closed, a backwash liquid discharge valve VQ0.5 is opened, and liquid is discharged from a backwash liquid discharge pipeline 82 along a liquid discharge pipeline. Closing the backwash drain valve VQ0.5, repeating the backwash operation, and blowing off the liquid from the cloth bag and blowing out the filter shell 10 as much as possible until the complete filtering flow is finished.

When the internal pressure of the protection pipeline is too high, the rupture disk VA-01 can trigger, and the blasting fragments can be discharged from the waste discharge pipeline along with liquid and gas. The manual ball valve VQ-01 can also be suitably and manually depressurized.

The discharged slurry and dry residue filter dust can fall into a residue collecting tank.

The whole process, the valve, the internal pressure, the pressure difference, the visual observation and the like are all completed by the intelligent unit, and the PLC control unit is used for monitoring, fully-automatic processing and high efficiency and convenience.

The candle type self-filtering system is mainly used for a high-content solid medium recovery section, the filtering precision can reach 1 mu m generally, and the candle type self-filtering system can be widely used for catalyst recovery filtering, cake carbon recovery filtering, polyol filtering activated carbon filtering, chemical product decoloring filtering, electrolyte impurity removal, metal degreasing deslagging, phosphating deslagging and the like. A plurality of candles are arranged in the filter shell 10, and filter cloth is sleeved outside the candles for filtering liquid and solid. The filter cake can be fully automatically operated after filtration, and the filter cloth is cleaned, so that the filter cake can be applied to a larger filtering area due to the fact that a driving device is not arranged, the structure is simple, and a unique sealing hose is adopted for a very important sealing part of the filtering equipment, so that leakage-free stable filtration is realized. The turbid liquid with impurities enters from the outside and passes through the filter element to form a filter cake, the filter cake is accumulated to a certain extent, the pressure difference is critical, the inlet valve and the outlet valve are closed, compressed gas enters and dries the filter cake, the back blowing gas discharges the impurities, and the filter element is regenerated. Both dry discharging and wet discharging are realized by introducing reverse pressure inside, the unique structure strengthens reverse flow, leads to outward rapid expansion of the filter cloth, especially leads to cracking of the filter cake in the area where the filter cake is adhered, is instantaneously thrown away from the filter cloth by reverse blowing gas, and has no other moving parts except for inflation of the filter cloth. The full-automatic control of four main points of filter cake thickness control, filter cake cleaning, new filter cake reconstruction and filtrate quality monitoring is realized through the PLC control unit.

It will be apparent to those skilled in the art that various modifications to the above embodiments may be made without departing from the general spirit and concepts of the utility model. Which fall within the scope of the present utility model. The protection scheme of the utility model is subject to the appended claims.

Claims

1. A candle-type automatic filtration system, comprising

2. The candle automatic filtration system of claim 1, wherein the cloth bag filter element is a double quincuncial structure.

3. The candle automatic filtration system of claim 1, wherein said forward blowing pipe comprises a forward blowing intake pipe and a forward blowing exhaust pipe;

4. The candle automatic filtration system according to claim 3, wherein the forward blowing exhaust duct further comprises a branch vent duct, one end of the branch vent duct is connected to the exhaust duct, the other end is connected to the top of the filter housing, and a vent pipe diameter of the branch vent duct is smaller than a vent pipe diameter of the forward blowing exhaust duct.

5. The candle automatic filtration system of claim 1, wherein said blowback piping comprises a blowback intake piping and a blowback exhaust piping;

6. The candle automatic filtration system of claim 1, wherein said forward wash conduit comprises a forward wash liquid inlet conduit and a forward wash liquid drain conduit;

7. The candle automatic filtration system according to claim 6, wherein the forward washing drain pipe further comprises a branch drain pipe, one end of the branch drain pipe is communicated to the bottom of the filter housing, the other end of the branch drain pipe is communicated to the drain pipe, and a drain hole diameter of the branch drain pipe is smaller than a drain hole diameter of the forward washing drain pipe.

8. The candle automatic filtration system of claim 1, wherein the backwash piping comprises a backwash feed piping and a backwash drain piping;

9. The candle automatic filtration system of claim 1, wherein the protective conduit is further provided with a manual ball valve.

10. The candle automatic filtration system of claim 1, wherein a differential pressure transmitter is provided between the tube of the turbid liquid tank connected to the filter housing and the liquid collection tube.