CN104645709A - Liquid clarification filtering machine with large treatment amount - Google Patents

Abstract

The invention relates to a liquid clarification filtering machine which is large in treatment amount and large in solid content and contains solid particles which are fine and sticky or flocculent. A filtering material in the machine consists of two large parts, namely a deep filtering layer consisting of dispersed macromolecular foam microsphere stacking thick layers and a tubular surface layer filter consisting of a high-precision rigid precision microhole filtering pipe. One or more mechanical stirring blades are arranged in the filtering machine. The filtering machine disclosed by the invention is high in deep dispersion and filtration treatment capacity and high in tubular precision microhole filtration precision; by combination of blowback stirring of gas-liquid mixing flow in the microhole pipe and mechanical stirring and powerful flushing, the regeneration effect is good; the four advantages are combined together, so that the novel liquid clarification filtering machine which is extremely high in unit treatment capacity, high in filtration liquid quality, low in energy consumption and material consumption, easy and convenient to operate and high in cost performance can be formed.

Description

A kind of clarified filter of liquid of high throughput

Technical field:

The present invention relates to a large class I liquid I treating capacity quite large, but in liquid, solid content is not a lot, only requires that filtered filtrate clarity is high, solid is only required to the liquid clarification filtration system of high enrichment.Can be used for mine, metallurgical, large-scale petrochemical, the industrial circulation water treatment of the industries such as electric power, wastewater treatment, small and medium cities from the process of muddy rivers and lakes water potable water, sanitary sewage disposal etc.

Background technology:

In all kinds industrial production, have every day unprocessed or process the incomplete industrial wastewater containing quite multiple harmful constituent and directly enter rivers and lakes in a large number; Also have every day larger unprocessed or process incomplete sanitary sewage and also enter rivers and lakes.

Often Freshets roar down from the mountains in many places, and mad rain causes disaster.The sand filter of the waterworks that many physical features are not high is often washed away by flood, and numerous citizen and enterprise are in the calamity that drinking water lacks immediately.

In industrial production, many enterprises also need a large amount of water for industrial use, these water all must recycle, because the flue dust in external air falls into recirculated water in a large number, due to bacterial reproduction, the water quality of recirculated water can be muddy gradually, and affect heat transfer or other functions of recirculated water, recirculated water that must be constantly huge to flux carries out purification filtering in time.

The water quality that this few class treating capacity is very large above, as adopted traditional gravity settling basin, floor space is large, and cost of land is high; As adopted traditional sand filter (comprising valveless filtering pool), due to bacterial reproduction, cause layer of sand easily to lump, cause local channel, separative efficiency worsens, and water quality is unstable; Various with filter cloth or filter screen be filter material conventional tubular or chip filter, due to the difficult removal of filter cake that stickum in water is formed, so that unload filter cake and bother very much; The various precise micropore pipes that filtering accuracy is very high, although filtering accuracy and filter efficiency are very high, unload viscosity filter cake very convenient, but separately for the filtration of big yield, it is very frequent with regeneration that viscosity filter cake is unloaded in blowback, and need filter area very large, cost of investment is very high, unless the added value of filtrate is very high, general application like this is not suitable for.

The present invention is exactly large for treating capacity, and in water, viscous fine particle ratio is high, and after flocculation treatment, the filter cake of formation is very sticky, and as singly adopted in-depth filtration, easily produce local caking and channel, filter efficiency worsens; As alone " surface filtration " method, the viscosity filter cake formed at surface of filter medium is general very thin, unloads filter cake often, operates pretty troublesome, and in addition, alone " surface filtration " method, because filter cake is thin, need very large filter area, cost of investment is very high.The present invention, in order to solve the filtration of this type of material, special to adopt the combining structure of the precise micropore both surface filtration of larger filter area " first order to be the large diameter in-depth filtration+the 2 grade with mechanical strong stirring be ".First allow the flocculate of a large amount of viscosity through flocculation be filtered in the deep layer of the first order, the remaining fine grained less than 5% is retained by the precise micropore both surface filtration of the high-efficiency high-accuracy of the second level again.Such technical combinations, both throughput was large, and the clarity of the filtrate obtained is high, and capital cost is little again, and overall cost performance is quite high.

Summary of the invention:

The clarified filter of liquid of high throughput all adopts large diameter cylinder housing, upper and lower side all adopts ellipsoidal head, barrel diameter is all greater than 2 meters, simplified height is not less than 2.5 ~ 3 meters, simplified internal pressure-resistant is not less than 0.2MPa, the material of cylindrical shell generally adopts carbon steel, the anti-corrosion materials such as liner rubber or plastics.The material of particular/special requirement can adopt stainless steel, and inside also needs liner rubber or plastics;

Cylindrical drum is inner, and top is for installing rigid precision microporous filtering pipe, and bottom is dress foam microshell filter material.

Which kind of filtering accuracy the precise micropore pipe on top adopts, great filter area (i.e. every root length of screen pipe and total radical), technical specification (the material of microballoon of the foam microshell of bottom, spherolite size specification and size distribution, the proportion specification of spherolite and distribution, ball surface is the need of positively charged, the need of outer surface adhesion section fine hair, the thickness etc. of deep layer region) all need basis to be filtered characteristic and the processing requirements of liquid, first series of physical is carried out to stoste and chemical property is tested, then the small-sized or medium-sized simulated test of several times is carried out, according to this series of tests and test data, the specification of the precision microporous filtering pipe of decision machine internal upper part and the gross area, determine the kind of the foam microshell in in-depth filtration district, bottom, configuration of surface, the thickness of specification and deep layer region and the number of units of filter,

The paddle of the foam microshell of deep layer region, middle and upper part in machine can be contained in (below rigidity microporous pipe, be in the middle part in deep layer microballoon district, shaft stretches into housing outside the end socket of top, enter in the middle part of body), also can extend upwardly in the middle of body (motor and reduction box etc. are contained in outside body) outside filter organism bottom end socket;

If body diameter is greater than 3 meters, in the middle of in machine, fill paddle, in machine, the side of different parts also can fill several small-sized paddle, when making regeneration, in machine, gas-liquid-solid three-phase stirs more violent, the solid that microsphere surface is adsorbed more completely more fast-falling in water;

If filter case material is non-magnetic stainless steel, the axle of paddle need not pass body housing, and the outer motor of machine can adopt magnetically-actuated, paddle in driving machine.

Reduction box outside machine can be replaced by frequency converter;

Each cycle is filtered and is terminated, (air pressure is 0.05-0.1MPa to input by the pipe of side direction microporous pipe in the rigidity microporous pipe of top the compressed air carrying a small amount of clear water secretly outward, this pressure as required, can regulate in addition), carry out air water to the foam microshell layer in machine to seethe, open all paddles again, (variable speed), object within the shortest time, foam microshells all in machine can be carried out quick gas, liquid, solid three-phase acutely to stir, and makes the most solia particles being adsorbed on microsphere surface come off in machine in liquid.

Stop stirring; stop gas-liquid backwash; microballoon all floats; air is drained from body top; most of solia particle meeting automatic sedimentation in machine in liquid is to machine inner bottom part; after sedimentation certain hour, open bottom valve, allow underpart contain solid underflow water and slowly release (being discharged to underflow water storage pond).

Carry out a gas-liquid backwash again, then stir, then stop, allowing remaining underflow water slowly drain to deckered stock chest storage pond.

This back-washing method generally only need two to three times just enough, first time backwash is long with mixing time, successively reduces later, treats that foam microshell surface is substantially totally, then carries out new cycle filtration.

Be filtered feed liquid to be delivered in the clarified filter of deep layer by feed liquid delivery pump.(on pump suction pipe road, be provided with flocculant quantitative adding device and measuring pump, after flocculant adds, suction line be also equipped with static mixer, input liquid and flocculant through fully mixing and flocculation, then are passed in filter by delivery pump.)

Separately can establish simple solid-liquid filtration device, to filter and filter cake press dry to the underflow water in deckered stock chest, because flocculant and fine grained in underflow water are very thin, the difficulty of filtration is comparatively large, can add a small amount of boiler coal ash and make filter aid in deckered stock chest.If the clarity of filtered water is inadequate, filtered water can return in main filter system, continues to filter together with large volume untreated liquid.

Accompanying drawing illustrates:

Fig. 1 is basic operation procedure figure;

Fig. 2 is the filtering machine structure sketch that bottom drives paddle;

Fig. 3 is the filtering machine structure sketch that top drives paddle;

Concrete embodiment:

Embodiment 1:

Fig. 1 provides operational flowchart, it is quite thin that this flow process is suitable for sticky fine grained in stoste, must before entering filter, at charge line automatic feeding flocculant, and adopt static mixer, make it fully mixing and flocculation as early as possible, and allow flco increase as early as possible, then carry out deep bed filter and carry out high efficiency filter.

Embodiment 2:

The embodiment of Fig. 2, suitable simplified diameter is no more than 2.5 meters, and have one piece of card that punches between the oval rotary head on cylindrical shell top and cylindrical shell, rigidity microfiltration tube is directly contained on card, main paddle in simplified is installed from cylinder body bottom, and shaft is through bottom bulkhead.In order to make foam microshell stir acutely, several little paddles can be filled in cylindrical shell side; Cylinder inboard wall should fill four vertical baffles, except there being circular motion when making foam microshell stir, also having and axially stirring up and down.

Embodiment 3:

The embodiment of Fig. 3, suitable barrel diameter is more than 2.5 meters, the rigidity microporous pipe of machine internal upper part is not suitable for installing with card, series of parallel comb is arranged at suitable filter top, above comb or have a series of joint (or simultaneously having a series of joint above with below) below, rigidity microfiltration tube all installed by these joints.This series of comb just gathers the filtrate that rigidity microporous pipe is filtered, and the liquid of filtering or clear water is guided to outside filter by the fairlead on comb.In machine, central stirring shaft can be guided in machine from filter housing upper through top end socket.Side also can fill several less paddle.Cylinder inboard wall also should fill four vertical baffles.

Claims (9)

1. filter is cylindrical shape, and in cylindrical shell body, filling thickness its proportion more than 1.5 ~ 2 meters is less than the microballon shape plastic microsphere of filtrate.Plastics kind can have multiple, as polystyrene, and polyethylene, polypropylene and other suitable plastics.Microsphere is inflation porous body, and its surface should not be generally smooth, but has many salient points or concavo-convex microgroove.

2. according to claim 1, physical or chemical treatment can be carried out in the surface of foamed plastics microballoon, makes microsphere surface have positive charge, to improve the function that microsphere surface catches ultrafine particle.

3., according to claim 1, the surface of foamed plastics microballoon can some short thin chemical fibres of secure bond, to improve the ability that microsphere surface catches viscosity floccule.

4. according to claim 2, the granular size of plastic microsphere and grain density can be even, also granular size can have 0.3mm---the one fixed width of 2mm; The density of particle also has one fixed width to change.And particle is thin, density is little, and the large density of particle is large, makes settled layer more and more thick from top to bottom with this, the porosity of accumulation horizon from top to bottom, more and more greatly.

5. cylinder top install numerous " rigid precision microporous filtering pipe " vertically, as " deep layer foam microshell " filter after carry out the higher end-filtration of precision.Its filter material can use " the sintered microporous pipe of rigid macromolecule ", metal dust or fiber sintering microporous pipe, the sintered microporous pipe of inorganic powder, metal dust or fibres bond microporous pipe, around the wrapping wire microporous pipe of metal or plastic wire on the metal or plastic tube of punching, the metal or plastic tube of punching wrap the screen pipe etc. of one or more layers filter cloth.

6., according to claim 5, the special porous cloth of one deck can be overlapped in rigidity microporous pipe surface, and the fiber surface forming this cloth needs precoating layer antitack agent, or makes porous cloth with tetrafluoroethylene fiber.This smooth noncohesive porous cloth can prevent the floccule after filtering from directly sticking to the outer surface of rigidity microporous pipe.Stop once filter, these floccules are easily from Automatic-falling smooth noncohesive filter cloth, and this can make the pore on rigidity microporous pipe surface not easily be blocked by floccule.

7. rigidity microfiltration tube is all contained in the top of cylinder, adopt top pattern board type that (end of rigidity microporous pipe down) is installed, or adopt top calandria that (microporous pipe end or upward, or down, or not only upward but also down) is installed simultaneously.

8. the paddle in cylinder is contained in cylindrical shell internal upper part central authorities, or middle part or lower central; According to barrel diameter, also can install multiple, except one, central authorities, other are contained in cylindrical shell side.

9. paddle is by the electrical motor driven outside cylindrical shell, and if simplified material is carbon steel, the turning cylinder of paddle should through the wall of cylindrical shell; If cylinder material is not magnetic stainless steel, paddle is not by magnetic drives (axle of paddle needs the wall through cylindrical shell).