CN205699790U - A kind of swash plate filter-cloth filtering device and control method - Google Patents

Abstract

A slanting plate filter cloth filtering device and a control method belong to the field of environmental water pollution control, and include a pool body, a slanting plate filter cloth disc, a water collection pipe, a drug feeding and mixing system, a cleaning system, and a mud discharge system. The water inlet pipe is installed on one side of the bottom of the pool body, the water outlet pipe is installed on the other side of the pool body, the mud discharge pipe is arranged at the bottom of the pool, the entrance of the water inlet pipe is provided with a dosing port, and the water inlet pipe is connected to the tubular mixer. The water diversion port is arranged on the tubular mixer, the inclined plate filter cloth disc is fixed in the center of the pool body, the suction pipe shoe is connected by the dredge pump and arranged close to the filter cloth, the water collecting pipe is connected with the inclined plate filter cloth disc, and the water collecting The horizontal pipe is connected with the water collecting pipe, the water collecting pipe is connected with the water collecting canal, and the truss above the pool body is equipped with a driving vehicle. The operation mode of the device adopts the simultaneous operation of different and lateral flow filtration and sedimentation, and the operation is divided into medicament mixing, filtration, sedimentation and sludge discharge, and backwashing procedures. The utility model has the advantages of high treatment efficiency, good effluent quality, small footprint, etc., and is a suitable choice for the advanced treatment process of sewage plants.

Description

An inclined plate filter cloth filter device and control method

technical field

The utility model belongs to the field of environmental water pollution control, in particular to the field of advanced sewage treatment equipment and control technology. In particular, a slanting plate filter cloth filtering device and a control method.

Background technique

Filtration is usually divided into surface filtration and depth filtration. Surface filtration means that pollutant particles are trapped on the surface of the medium, and a filter residue layer is formed for a period of time. The medium and the filter residue layer work together as a filter medium, such as membrane filtration, fiber rotary disc filter, etc. ; Depth filtration means that pollutant particles are trapped in the pores inside the medium, such as activated sand filters, V-shaped filters, etc. At present, the most advanced and widely used surface filter in the world should be a fiber rotary disc filter (filter cloth filter). At present, 700 sewage plants around the world have adopted this technology. The effluent water quality of the filter cloth rotary disc filter is high, the treatment effect is good, and the equipment operates stably.

Cloth filter is suitable for rainwater treatment, cooling circulating water treatment, advanced treatment and recycling of wastewater. Influent water quality SS≤30mg/L, effluent water quality SS≤10mg/L. It is used for the advanced treatment of sewage, after biochemical treatment such as conventional activated sludge method, SBR system, oxidation ditch system, etc. It is mainly used to remove total suspended solids, and it can also remove phosphorus and heavy metals after adding chemicals.

The filter cloth filter process concentrates filtration and sedimentation in the same filter tank, which is mainly composed of filter cloth filter disc, cleaning device, water collection device and mud discharge device. After the raw water enters the filter tank for special treatment and energy dissipation, it passes through the microporous filter Cloth disk, solid suspended solids are trapped on the outer fluff by the filter cloth, the filtrate is collected through the hollow water collection pipe, and discharged from the filter through the gravity overflow tank. Due to the adsorption of suspended impurities on the outer fluff of the filter cloth, a filter residue layer is gradually formed. With the accumulation of the filter residue layer on the filter cloth, the filter resistance of the filter cloth increases, and the liquid level in the pool gradually rises. Suction pump and transmission device, during the rotation of the disc, the scraper fixed on the outside of the filter cloth rubs against the surface of the filter cloth to scrape off the sludge on the surface of the filter cloth, and at the same time, the water in the disc is sucked from the inside out to clean For the sludge in the micropores of the filter cloth, a sludge discharge pipe is installed at the bottom of the tank. After setting the time, the sludge discharge pump is turned on to discharge the sludge.

There are many types of filter cloth filters, including rotary disc type, vertical plate type, and diamond type. The discs of each form are arranged vertically. Because the fluff of the filter cloth on the disc becomes soft after being moistened, the fluff hangs down, and the impurities contained in it are not easy to be absorbed. Scraper and back suction pump are removed, and after the filter cloth disc runs for a period of time on the turntable filter cloth, the fluff on the filter cloth is easy to harden and adhere, especially after adding phosphorus removal flocculant, the flocs are highly viscous and backwash poor effect.

According to the shallow pool theory, the ordinary sedimentation tank is improved into an inclined plate sedimentation tank, which improves the sedimentation efficiency. It is divided into a series of shallow sedimentation layers by using parallel pipelines, and the settled sediment moves and separates in each shallow sedimentation layer. According to their mutual movement direction, it can be divided into three different separation methods: reverse (different) flow, co-current flow and lateral flow. Between every two parallel inclined plates is equivalent to a very shallow sedimentation tank.

The utility model combines the respective advantages of the filter cloth filter and the inclined plate sedimentation tank to improve the design, solve the problem of poor backwashing effect of the filter cloth filter, enhance the water outlet effect, and prolong the service life of the filter cloth.

Contents of the invention

The purpose of the utility model is to provide a slanted plate filter cloth filter device and control technology, which is used to solve the problem of poor backwashing effect of the filter cloth filter, enhance the water outlet effect, improve the water quality of the outlet water, and prolong the service life of the filter cloth.

The technical solution of the utility model is a slanted plate filter cloth filter device, which includes a pool body, a slanted plate filter cloth disk, a water collection pipe, a drug feeding and mixing system, a cleaning system, and a mud discharge system. The water inlet pipe is installed on one side of the bottom of the pool body, the water outlet pipe is installed on the other side of the pool body, the mud discharge pipe is arranged at the bottom of the pool, the entrance of the water inlet pipe is provided with a dosing port, and the water inlet pipe is connected to the tube mixer. The water diversion port is arranged on the tubular mixer, the sloping plate filter cloth disc is fixed in the center of the tank body, the suction pipe shoe is connected by the dredge pump and arranged close to the filter cloth, the water collecting pipe is connected with the slanting plate filter cloth disc, and the water collecting The horizontal pipe is connected with the water collecting pipe, the water collecting pipe is connected with the water collecting canal, and the truss above the pool body is equipped with a driving vehicle.

Pool body: It can be designed as a stainless steel or steel-concrete structure according to conditions and requirements, and is the main structure of the filtration process.

Inclined plate filter cloth disc: This part is the core unit of the utility model, mainly composed of stainless steel disc support, arc-shaped inclined plate, filter cloth, and water collection port. The inclined plate filter cloth disc is installed at 45~60°, and the arc-shaped The sloping plate faces upwards, the filter cloth faces downwards, the length of the slab is 1~1.2m, and the horizontal distance is 3~5mm; due to the sedimentation of the flat plate, it is easy to retain sediment and it is difficult to clean, once the flat inclined plate is bent and deformed, the mud passage will become narrow If it is not smooth, there will be serious mud accumulation on the sloping plate and deterioration of effluent quality. Therefore, the utility model is equipped with an arc-shaped sloping plate.

Water collection pipe: The filtered water is collected by the central water collection pipe, and then discharged from the outlet weir.

Dosing mixing system: According to the treatment requirements, the dosing and chemical mixing system is designed. A dosing port is set at the front end of the raw water inlet. You can choose to add flocculants, phosphorus removal agents, heavy metals and other chemicals. After entering the pool, the petal-type tubular In the mixer, the medicament is in full contact with the water, and enters the pool body through multiple water inlets.

Sludge discharge system: The sludge discharge system is divided into two parts. The recoil system in contact with the disc removes the impurities accumulated in the filter cloth. Two sludge discharge pipes are arranged at the bottom of the pool to mainly collect the sludge under the inclined plate sedimentation set.

Cleaning system: backwashing suction boots, pipes, trusses, driving machine, used for daily slag discharge and backwashing of filter cloth.

The operation mode of the utility model adopts the synchronous operation mode of different and lateral flow filtration and sedimentation, and the operation is divided into the process of medicament mixing, filtration, sedimentation and mud discharge, and backwashing:

Medicament mixing——After the raw water is mixed by the water inlet pipe mixer after being dosed, the multi-point water inlets are set to enter the reaction pool at the same time;

Filtration - the water flow enters from the bottom of one side of the pool body and is discharged from the top of the other side. Compared with the entire disc, it flows from bottom to top and from one side to the other side. The settled particles fall along the inclined plate under the action of gravity , while the clarified liquid rises along the ground of the inclined plate, the two fluids flow in reverse, and the raw water entering the pool body enters the disc from the filter cloth under the pressure under pressure, and the suspended impurity particles are trapped in the The surface of the filter cloth is separated from the water. As the filtration progresses, the impurities on the surface of the filter cloth accumulate, the resistance of the filter cloth surface to pass through the water increases again, the water level of the inlet water rises, and the backwash system is turned on;

Sedimentation and mud discharge - under the action of gravity, some of the impurity particles trapped on the surface of the filter cloth fall to the arc-shaped inclined plate on the adjacent disc, and when they reach a certain accumulation, the sludge will slide to the bottom of the pool under the action of gravity mud pipe discharge;

Backwashing——The disc is fixed, and as the truck moves on the truss above the pool, the backwashing boots scrape and wash the disc filter cloth, and at the same time, the backwashing boots have a suction pump to filter the filter cloth through strong suction. Loosen and unfold, so that the impurity particles hidden in the gaps of the fluff are sucked out, so that the filter cloth is cleaned.

The filtration rate is 4~8m ³ /(m ² ·h), the backwash intensity is 0.2~0.4m ³ /(m ² ·h), and the suction backwash starts when the water head loss reaches 0.35m.

Beneficial technical effects of the utility model:

1. The equipment is simple, compact, easy to install, and occupies a small area;

2. Backwashing, filtration and precipitation are carried out at the same time, and the idle rate of equipment is low;

3. It can be used to purify raw water with high suspended solids concentration, and can also remove phosphorus and heavy metals;

4. The effect of backwashing and mud discharge is good, which improves the regeneration effect of filter cloth and prolongs the service life of filter cloth;

5. The filter water head is small, saving energy consumption.

Description of drawings

Fig. 1 is the front schematic view of the utility model device.

Fig. 2 is a schematic plan view of the device of the present invention.

Fig. 3 is a schematic side view of the device of the present invention.

Fig. 4 is a schematic diagram of the inclined plate filter cloth disc of the present invention.

Fig. 5 is a schematic cross-sectional view of the inclined plate filter cloth disc of the present invention.

1 tank body, 2 inclined plate filter cloth disc, 3 filter cloth, 4 water collection pipe, 5 water inlet pipe, 6 water outlet pipe, 7 mud discharge pipe, 8 dosing port, 9 tube mixer, 10 water diversion port, 11 driving , 12 suction dredge pipe boots, 13 suction dredge pumps, 14 water collection weirs, 15 water collection horizontal pipes, 16 curved inclined plates.

detailed description

A slanted plate filter cloth filter device, the water inlet pipe 5 enters from the bottom side of the pool body 1, and a drug dosing port 8 is set at the inlet of the water inlet pipe 5, and the water inlet pipe 5 is connected with a tubular mixer 9, and the tubular mixer 9 The water diversion port 10 is arranged on the top, the slanted plate filter cloth disk 2 is fixed in the center of the pool body, the dredging pipe shoe 12 is connected by the dredging pump 13 and arranged close to the filter cloth 3, and the backwashing system is backwashed by the power provided by the crane 11. The water collection pipe 4 is connected to the inclined plate filter cloth disk 2, and the water collection horizontal pipe 15 is connected to the water collection pipe 4. The filtered water collected by the inclined plate filter cloth disk 2 is discharged to the water collection channel 14 through the water collection pipe 4, and is discharged from the outlet Water pipe 6 is discharged outside the pond. The mud discharge pipe 7 is arranged at the bottom of the pool for regular mud discharge.

The operation mode of the utility model adopts the synchronous mode of differential and lateral flow filtration and sedimentation, and the operation is divided into the processes of medicament mixing, filtration, sedimentation and mud discharge, and backwashing.

Medicament mixing—the raw water enters the reaction pool body 1 through the multi-point water distribution port 10 after being dosed through the dosing port 8 and then mixed by the water inlet pipe 5 and the tubular mixer 9 .

Filtration - The water flow enters from the bottom of one side of the pool body 1, and is discharged from the top of the other side. The settled particles descend along the inclined plate under the action of gravity, while the clarified liquid rises along the surface of the inclined plate, and the two fluids are reversed. The raw water flowing into the pool body 1 enters the disc ② from the filter cloth 3 arranged under the disc 2 under pressure, and the filtration rate is 4~8m ³ /(m ² ·h), and the suspended impurity particles are Trapped on the surface of the filter cloth 3 to realize separation from water. As the filtration proceeds, impurities on the surface of the filter cloth 3 accumulate, and the resistance of the surface of the filter cloth 3 to pass through water increases again. Suction backwash.

Sedimentation and mud discharge - under the action of gravity, some of the impurity particles trapped on the surface of the filter cloth 3 fall to the arc-shaped inclined plate 16 on the adjacent disc 2, and when a certain accumulation is reached, the sludge will slide to the pool under the action of gravity The bottom is discharged from the mud discharge pipe 7.

Backwash——The disc 2 is fixed, and with the movement of the crane 11 on the truss above the pool, the backwash boot 12 scrapes and washes the disc filter cloth 3. At the same time, the backwash boot has a suction pump 13, and the backwash intensity is 0.2 ~0.4m3/ (m2·h), loosen and unfold the filter hairs of the filter cloth 3 through strong suction, so that the impurity particles hidden in the gaps of the fluff are sucked out, so that the filter cloth 3 is cleaned.

Claims (4)

1. null1. a swash plate filter-cloth filtering device，Including cell body、Swash plate filter cloth disc、Collector pipe、Dispensing hybrid system、Purging system、Sludge drainage system,It is characterized in that: water inlet pipe (5) is arranged on cell body (1) bottom side,Outlet pipe (6) is arranged on the opposite side of cell body (1)，Discharge pipeline (7) is arranged at the bottom of pond，Water inlet pipe (5) import department is provided with dosing mouth (8),Water inlet pipe (5) is connected with tube mixer (9),Bleeder (10) is arranged on tube mixer (9)，Swash plate filter cloth disc (2) is fixed on cell body (1) central authorities,Dredging tube boots (12) are connected by dredge pump (13) and are close to filter cloth (3) to be arranged，Collector pipe (4) is connected with swash plate filter cloth disc (2),The transverse tube (15) that catchments is connected with collector pipe (4)，Collector pipe (4) communicates with braiding channel (14)，Driving (11) it is equipped with in cell body (1) upper truss.
2. A kind of swash plate filter-cloth filtering device the most according to claim 1, it is characterised in that: swash plate filter cloth disc is made up of stainless steel disc plate rack, swash plate, filter cloth, inlet, and wherein swash plate is arc swash plate.
3. A kind of swash plate filter-cloth filtering device the most according to claim 1, it is characterised in that: swash plate filter cloth disc 45 ~ 60 ° installation, arc swash plate faces up, filter cloth surface down, plate length 1 ~ 1.2m, level interval 3 ~ 5mm.
4. A kind of swash plate filter-cloth filtering device the most according to claim 1, it is characterised in that: described discharge pipeline (7) number is one, two or more.