CN202705137U - Double-layer filtering device for water treatment of high-concentration ammonia nitrogen water source - Google Patents

Abstract

The utility model provides a double-layer filtering device for water treatment of a high-concentration ammonia nitrogen water source and relates to a drinking water treating device. The double-layer filtering device is used for solving the problems that the application of zeolite powder or grains synthesized by using the attapulgite to the water treatment of the high-concentration ammonia nitrogen water source is blank and the use of a powder filtering device is limited. A filtering plate is horizontally arranged on the middle part of an inner cavity of a steel tank; a plurality of water through holes are uniformly arranged on the end face of the filtering plate; a filtering pipe is correspondingly under each of the water through holes; the upper end of the filtering pipe is fixedly connected with the lower end face of the filtering plate; a closed end is arranged at the lower end of the filtering pipe; a plurality of circular micro-pores are arranged on a pipe wall of the filtering pipe; a polypropylene line is wound on the outer surface of the pipe wall of each filtering pipe; a lateral wall water outlet pipe and an air-water backwashing pipe are both located above the filtering plate; a first grating plate is horizontally arranged in the steel tank; the first grating plate is located above the lateral wall water outlet pipe; and a second grating plate is located above the first grating plate. The double-layer filtering device is applied to the water treatment of the high-concentration ammonia nitrogen water source.

Description

A kind of Double-filtering device for the ammonia nitrogen in high density the water treatment

Technical field

The utility model relates to a kind of appliance for treating drinking water, is specifically related to a kind of filtration unit for the ammonia nitrogen in high density the water treatment.

Background technology

At present, the drinking water source is subject to ammonia and nitrogen pollution mostly, ammonia nitrogen concentration in the tap water is had stricter regulation both at home and abroad, China's " surface water and sewage monitoring technical specifications " (HJ/T91-2002) must survey project to what ammonia nitrogen was classified river, lake and reservoir and centralized tap water seedbed as.Existing " water environment quality standard " (GB 3838-2002) regulation ammonia nitrogen I, II, III, the V class standard limit value of China is respectively 0.15mg/L, 0.5mg/L, 1.0mg/L, 2.0mg/L; It is generally acknowledged that the ammonia nitrogen water quality index surpasses the source water of II grade standard limit value, should not be as the water source of Drinking Water, and the statistics of " China Environmental State Bulletin in 2011 " shows that China's surface water ammonia and nitrogen pollution is on average more than 2mg/L, therefore reach as high as 6～7mg/L, the development for the ammonia nitrogen the water treatment technology of high density like this is very urgent.

At present, zeolite granular absorption ammonia nitrogen method with its cheapness, efficient, take up an area the characteristics such as little and attracted attention by the people, studies show that in a large number attached ammonia nitrogen method is still needing to solve following problem aspect filtrate and the filtration unit: (1) natural zeolite pore canal system irregular structure, the aperture is little or pore volume is little, impure mineral exists in a large number, and not easily separated, purity, stability are all relatively poor; Synthetic or modified zeolite is one of committed step of filtering separation, and a large amount of scholars have carried out respectively the nitrogen studies of chemical industry synthetic zeolite adsorb ammonia, the research of synthetic zeolite from flyash absorption ammonia nitrogen, mineral modified adsorb ammonia nitrogen studies and the nitrogen studies of mineral synthetic zeolite adsorb ammonia for this reason.In recent years, extremely people's attention of the application of attapulgite in water treatment, become the focus of domestic and international research, the natural Tunnel-hole structure of attapulgite tool, after processing, alkaline solution can be used as crystal seed, be conducive to the synthetic of zeolite, at present existing corresponding patent report: attapulgite soaks lower synthetic sodalite (CN101066766A by high temperature (120 ℃～160 ℃) hydro-thermal alkali, CN101618880A), mordenite (CN101066766A), 4A zeolite (CN101066766A, CN101618880A, CN101817539A), X-type zeolite (CN101337681A), P type zeolite (CN101618880A), but synthetic zeolite powder or the application of particle in the ammonia nitrogen in high density the water treatment of attapulgite there is not yet report.(2) because the powder filtrate should not be placed in the filter tank, and the form Adsorption ammonia nitrogen of Chang Yiyu ammonia nitrogen in high density source water mix and blend causes sludge discharge large.(3) the upward flow filter treatment effect based on granule filter material is better than conventional rapid filter, siphon filter, " V " shape filter tank and lower to the stream filter tank, but when the filtration velocity of upward flow filtering equipment is difficult for greater than 5m/h, otherwise the tiny filtrate on filtering layer top namely easily runs off; Upwards the effect of back flushing is undesirable.

The utility model content

The purpose of this utility model be for solve the blank that the synthetic zeolite powder of attapulgite or particle use in the ammonia nitrogen in high density the water treatment, the use of powder media filtration device has the limited problem undesirable with backwash effect of filtration velocity of limitation, upward flow granule filter material filtering basin, and provides a kind of Double-filtering device for the ammonia nitrogen in high density the water treatment.

The utility model comprises the cylinder of steel body, the bottom water inlet pipe, filter plate, the sidewall rising pipe, the first flase floor, the second flase floor, the top rising pipe, the air-water backwashing pipe, vapor pipe and several chimney filters, filter plate is horizontally set on the middle part of cylinder of steel intracoelomic cavity, be laid with several limbers on the end face of filter plate, the corresponding chimney filter in the below of each limbers, and the upper end of chimney filter is fixedly connected with the lower surface of filter plate, the lower end of chimney filter is blind end, the tube wall of described chimney filter is provided with several micropores, and be wound with polyacrylic fibres on the outer surface of tube wall of each chimney filter, sidewall rising pipe and air-water backwashing pipe are symmetricly set on the outer side wall of cylinder of steel body, sidewall rising pipe and air-water backwashing Guan Jun are positioned at the top of filter plate, and the sidewall rising pipe is higher than the air-water backwashing pipe, described the first flase floor is horizontally set on the inside of cylinder of steel body, the first flase floor is positioned at the top of sidewall rising pipe, the second flase floor is arranged on the top of the first flase floor, and the second flase floor and the first flase floor be arranged in parallel, the top rising pipe is arranged on the top exterior walls of cylinder of steel body, described bottom water inlet pipe and vapor pipe all are arranged on the outer wall of cylinder of steel body bottom, described bottom water inlet pipe, the sidewall rising pipe, the top rising pipe, valve all is installed on air-water backwashing pipe and the vapor pipe.

The utility model comprises following beneficial effect: one, because the utility model combines powder filtrate pre-coating film technology and particle filtering layer, be upward flow filtration I district (the cavity zone at chimney filter 4 places is the I district) and upward flow filtration II district (the first flase floor 7, pebbles or quartz conglomerate supporting layer 8, attapulgite synthetic zeolite particle filtering layer 9 and the second flase floor 10 are the II district) the double medium filtration process is integrated, and adopted attapulgite synthetic zeolite powder or particle as filtrate, filter effect is improved, the concentration of ammonia nitrogen water is reduced to 0mg/L～0.15mg/L from 2mg/L～7mg/L after namely filtering, and satisfies the I level water quality standard requirement of national regulation; Because the utility model filtration II district's employing particle diameter is the filtrate of 0.8mm～1.5mm, particle diameter reduces from bottom to top successively, thickness of filter bed is 1200mm～1500mm, and the air-water backwashing process is that even constant speed water inlet is washed filtering layer, therefore the phenomenon of having avoided the tiny filtrate in filtering layer upper strata to run off and being difficult to filtrate is rinsed well occurs, and the utility model zeolite powder or particle that attapulgite is synthetic is applied in the ammonia nitrogen in high density the water treatment.Two, the utility model is simple in structure, floor space is little, easy to use, operation can realize Automatic Control, and efficient economy, non-secondary pollution.Three, the utility model can be used for tap water purifying, groundwater treatment, municipal dirty source water treatment, and is used for new construction and improvement project.

Description of drawings

Fig. 1 is front view of the present utility model, Fig. 2 is attapulgite synthetic zeolite powder mixing pre-coating solution forms the coating filter membrane on the surface of chimney filter 4 technological process flow process figure, Fig. 3 is the filtration procedure process flow sheet that pending ammonia nitrogen in high density source water is finished through cloth pool 15, catchment area, middle part 5, pebbles or quartz conglomerate supporting layer 8, attapulgite synthetic zeolite particle filtering layer 9 successively, Fig. 4 is back flushing and the backwashing water emptying process schema that filters the II district, and Fig. 5 is back flushing and the backwashing water emptying process schema that filters the I district.

Embodiment

Embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment comprises cylinder of steel body 1, bottom water inlet pipe 2, filter plate 3, sidewall rising pipe 6, the first flase floor 7, the second flase floor 10, top rising pipe 12, air-water backwashing pipe 13, vapor pipe 14 and several chimney filters 4, described filter plate 3 is horizontally set on the middle part of cylinder of steel body 1 inner chamber, the circumferential outer surface of filter plate 3 is fixedly connected with the inwall of cylinder of steel body 1, be laid with several limbers 3-1 on the end face of filter plate 3, the corresponding chimney filter 4 in the below of each limbers 3-1, so arrange, the water of being convenient in the chimney filter 4 flows into catchment area 5, middle part by limbers 3-1, and the upper end of chimney filter 4 is fixedly connected with the lower surface of filter plate 3, the lower end of chimney filter 4 is blind end, the tube wall of described chimney filter 4 is provided with several circular micropores, and the outside surface of each chimney filter 4 tube wall is wound with polyacrylic fibres, so arrange, be beneficial to adhering to of attapulgite synthetic zeolite powder, thereby form gradually attapulgite synthetic zeolite powder coating.Described sidewall rising pipe 6 and air-water backwashing pipe 13 are symmetricly set on the outer side wall of cylinder of steel body 1, sidewall rising pipe 6 and air-water backwashing pipe 13 all are positioned at the top of filter plate 3, and sidewall rising pipe 6 is higher than air-water backwashing pipe 13, sidewall rising pipe 6 and air-water backwashing pipe 13 all are tightly connected with cylinder of steel body 1, described the first flase floor 7 is horizontally set on the inside of cylinder of steel body 1, the circumferential outer surface of the first flase floor 7 is fixedly connected with the inwall of cylinder of steel body 1, the first flase floor 7 is positioned at the top of sidewall rising pipe 6, the second flase floor 10 is arranged on the top of the first flase floor 7, and the second flase floor 10 and the first flase floor 7 be arranged in parallel, during use, 7 pairs of pebbless of the first flase floor or quartz conglomerate play the effect of support, the second flase floor 10 can prevent that the tiny filtrate on filtering layer upper strata runs off under the impact of current, top rising pipe 12 is arranged on the top exterior walls of cylinder of steel body 1, and top rising pipe 12 is tightly connected with cylinder of steel body 1, described bottom water inlet pipe 2 and vapor pipe 14 all are arranged on the outer wall of cylinder of steel body 1 bottom, bottom water inlet pipe 2 is tightly connected with cylinder of steel body 1, described bottom water inlet pipe 2, sidewall rising pipe 6, top rising pipe 12, on air-water backwashing pipe 13 and the vapor pipe 14 valve is installed all, filter plate 3, chimney filter 4, the first flase floor 7 and the second flase floor 10 are stainless steel.The ammonia nitrogen in high density source water refers to that the content of ammonia nitrogen in the contaminated source water is at 2mg/L～7mg/L.The below of chimney filter 4 is cloth pool 15, chimney filter 4 regions are for filtering I district 16, for filtering II district 17, be that the top of catchment area, middle part 5, the second flase floors 10 is upper-part centralized pool 11 between filter plate 3 and the first flase floor 7 between the first flase floor 7 and the second flase floor 10.

Embodiment two: in conjunction with Fig. 1 present embodiment is described, the length of the chimney filter 4 of present embodiment is 500mm～800mm, and the external diameter of chimney filter 4 is 15mm～25mm.Other composition and annexation are identical with embodiment one.

Embodiment three: in conjunction with Fig. 1 present embodiment is described, the aperture of each the circular micropore on the chimney filter 4 of present embodiment is 5mm～10mm, and the circular micropore total area on each chimney filter 4 accounts for 25%～45% of chimney filter surface-area.Other composition and annexation are identical with embodiment one or two.

Use procedure of the present utility model: the utility model is before processing the ammonia nitrogen in high density source water, first pebbles or quartz conglomerate supporting layer 8 and attapulgite synthetic zeolite particle filtering layer 9 are added to and filter II district 17, wherein the coarse grained particle diameter of attapulgite synthetic zeolite is 0.8mm～1.5mm, the height of attapulgite synthetic zeolite particle filtering layer 9 is 1200mm～1500mm, and the particle diameter of attapulgite synthetic zeolite particle filtering layer 9 reduces from the bottom to top successively.The treating processes of ammonia nitrogen in high density source water is divided into three phases: the formation, filtration and the back flushing that are respectively the coating filter membrane.

1, the formation stages of coating filter membrane: see Fig. 2, close top rising pipe 12, valve on air-water backwashing pipe 13 and the vapor pipe 14, open the valve on bottom water inlet pipe 2 and the sidewall rising pipe 6, utilize recycle pump that the attapulgite synthetic zeolite powder (100 orders～200 orders) of certain mass and concentration is mixed pre-coating solution from bottom water inlet pipe 2 suction cloth pools 15, relying on Water Pressure will mix on the polyacrylic fibres that pre-coating solution is evenly distributed to the winding of chimney filter 4 outer surface of tube wall under the drive of current, form gradually the coating filter membrane, the mixing pre-coating solution then enters the inside of chimney filter 4 by the micropore on the chimney filter 4, again gradually through the top of chimney filter 4, limbers 3-1 flows into catchment area 5, middle part, then discharged by sidewall rising pipe 6, at this moment, establish one in cylinder of steel body 1 outside and mix the pre-coating solution circulating box, mix pre-coating solution in the case and import cylinder of steel body 1 from bottom water inlet pipe 2, through the filtered water of chimney filter 4 from entering again the mixing pre-coating solution circulating box of peripheral hardware after sidewall rising pipe 6 is discharged, so behind circulation 15min～30min, at this moment form the coating filter membrane that thickness is about 2mm～4mm on the surface of chimney filter 4, attapulgite synthetic zeolite powder in the follow-up mixing pre-coating solution is constantly by membrane retention, until delivery turbidity is approximately at 0 o'clock, the formation of coating filter membrane is finished, this termination that circulates.The operational process in this stage 1 need to mix the pre-coating solution continuous supplying to, in order to avoid the coating filter membrane comes off from chimney filter 4 surfaces and affects the biofilm effect.

2, filtration stage: see Fig. 3, close the valve of sidewall rising pipe 6, air-water backwashing pipe 13, vapor pipe 14, open the valve of bottom water inlet pipe 2 and top rising pipe 12, utilize recycle pump that pending ammonia nitrogen in high density source water is pumped into cloth pool 15 from water inlet pipe 2, current are evenly distributed to the coating filter membrane surface of each chimney filter 4, according to the exchange sequence of zeolite to ion: ${\mathrm{Cu}}^{+}>{\mathrm{Rb}}^{+}>{\mathrm{<figure-callout\; id="4"\; label="NH"\; filenames="HDA00002060160400012.png,HDA00002060160400013.png"\; state="\{\{state\}\}">NH</figure-callout>}}_4^{+}>K^{+}>{\mathrm{Na}}^{+}>{\mathrm{Li}}^{+}>{\mathrm{Ba}}^{+}>{\mathrm{Sr}}^{+}>{\mathrm{CA}}^{+}>{\mathrm{<figure-callout\; id="2"\; label="Mg"\; filenames="HDA00002060160400011.png,HDA00002060160400012.png"\; state="\{\{state\}\}">Mg</figure-callout>}}^{2+},$ In exchangable ion on the zeolite and the source water

Permutoid reaction easily occurs, thereby with in the source water

Fixedly be adsorbed on attapulgite synthetic zeolite surface, namely be adsorbed on the coating filter membrane surface of chimney filter 4, make the concentration of source water middle and high concentration ammonia nitrogen be down to 1.0mg/L～2.0mg/L, the pollutents such as suspended impurity, organism, bacterium, virus also are trapped simultaneously.Current enter the inside of chimney filter 4 under the effect of inside and outside pressure difference, top, limbers 3-1 through chimney filter 4 flow into catchment area 5, middle part, current continue upwards to flow, adopt the upward flow filtration mode, current pass through pebbles or quartz conglomerate supporting layer 8, attapulgite synthetic zeolite particle filtration layer 9 successively.The setting of attapulgite synthetic zeolite particle filtration layer 9 makes the steady running in 10～20m/h scope of upward flow filtering velocity, having solved the upward flow filtering velocity can not be too high (＜5m/h), the sordid limitation of back flushing, by upward flow filtration II district 17 absorption and hold back in the source water remaining ammonia nitrogen and the pollutents such as suspended impurity, organism, bacterium, virus, water flows into upper-part centralized pool 11 after the filter, discharges from top rising pipe 12 at last.The operational process in this stage 2 need ammonia nitrogen in high density source water continuous supplying to, behind the operation certain hour, in source water, add an amount of attapulgite synthetic zeolite powder, make chimney filter 4 form new attapulgite synthetic zeolite coating filter membrane, the suitable proportion of rationally controlling attapulgite synthetic zeolite powder and ammonia nitrogen, suspended substance (representing with turbidity) can prolong filtration unit working time.After double medium filtration, ammonia nitrogen concentration is 0mg/L～0.15mg/L in the water of discharge, meets the I level water quality standard requirement of national regulation.

3, the back flushing stage: filtration unit is after operation for some time, and coating filter membrane and filtering layer filtration efficiency reduce, and this moment need to be to filtering I district 16 and filtering II district 17 and carry out back flushing.

Filter the backwash process in II district 17: see Fig. 4, close bottom water inlet pipe 2, vapor pipe 14, the valve of sidewall rising pipe 6, open air-water backwashing pipe 13, the valve of top rising pipe 12, utilize recycle pump that pressurized air and clear water are pumped in the catchment area 5, middle part from air-water backwashing pipe 13, frictional impact between the aggravation filtering material particle, make pollutent break away from easily filtrate, simultaneously, top rising pipe 12 connects water pump and aspirates, this moment, cloth pool 15 can whole be considered as at the bottom of the pond in upward flow filtration pond with filtration I district 16, the dirt mixed solution is through upper-part centralized pool 11, top rising pipe 12 is discharged, and this process operation is until till water quality meets the demands.

Filter the backwashing water emptying process in II district 17: after filtering the backwash process end in II district 17, close the valve of bottom water inlet pipe 2, vapor pipe 14, air-water backwashing pipe 13, open the valve of sidewall rising pipe 6, top rising pipe 12, backwashing water and pressurized air in emptying upper-part centralized pool 11, the filtration II district 17.

Filter the backwash process in I district 16: see Fig. 5, close the valve of top rising pipe 12, sidewall rising pipe 6, vapor pipe 14, open the valve of air-water backwashing pipe 13, bottom water inlet pipe 2, utilize recycle pump that pressurized air and back flushing clear water are pumped in the catchment area 5, middle part, water enters chimney filter 4 inside, the coating filter membrane that the attapulgite synthetic zeolite powder that lost efficacy is formed comes off from the surface erosion of chimney filter 4 fully, the dirt mixed solution flows out from bottom water inlet pipe 2 through cloth pool 15, and this process operation is until till effluent quality meets the demands.

Filter the backwashing water emptying process in I district 16: after filtering the backwash process end in I district 16, close the valve of top rising pipe 12, sidewall rising pipe 6, air-water backwashing pipe 13, vapor pipe 14, open the valve of bottom water inlet pipe 2, bottom water inlet pipe 2 with go out water pump and be connected, the backwashing water in suction filtration I district 16, water level is down in the cloth pool 15, close the suction pump that is connected with bottom water inlet pipe 2 this moment, open the valve of vapor pipe 14, the water in the cloth pool 15 is discharged cylinder of steel body 1 under action of gravity again.

Claims (3)

1. Double-filtering device that is used for the ammonia nitrogen in high density the water treatment, it is characterized in that: described filtration unit comprises cylinder of steel body (1), bottom water inlet pipe (2), filter plate (3), sidewall rising pipe (6), the first flase floor (7), the second flase floor (10), top rising pipe (12), air-water backwashing pipe (13), vapor pipe (14) and several chimney filters (4), described filter plate (3) is horizontally set on the middle part of cylinder of steel body (1) inner chamber, be laid with several limbers (3-1) on the end face of filter plate (3), the corresponding chimney filter (4) in the below of each limbers (3-1), and the upper end of chimney filter (4) is fixedly connected with the lower surface of filter plate (3), the lower end of chimney filter (4) is blind end, the tube wall of described chimney filter (4) is provided with several circular micropores, and be wound with polyacrylic fibres on the outer surface of tube wall of each chimney filter (4), described sidewall rising pipe (6) and air-water backwashing pipe (13) are symmetricly set on the outer side wall of cylinder of steel body (1), sidewall rising pipe (6) and air-water backwashing pipe (13) all are positioned at the top of filter plate (3), and sidewall rising pipe (6) is higher than air-water backwashing pipe (13), described the first flase floor (7) is horizontally set on the inside of cylinder of steel body (1), the first flase floor (7) is positioned at the top of sidewall rising pipe (6), the second flase floor (10) is arranged on the top of the first flase floor (7), and the second flase floor (10) be arranged in parallel with the first flase floor (7), top rising pipe (12) is arranged on the top exterior walls of cylinder of steel body (1), described bottom water inlet pipe (2) and vapor pipe (14) all are arranged on the outer wall of cylinder of steel body (1) bottom, described bottom water inlet pipe (2), sidewall rising pipe (6), top rising pipe (12), on air-water backwashing pipe (13) and the vapor pipe (14) valve is installed all.

2. a kind of Double-filtering device for the ammonia nitrogen in high density the water treatment according to claim 1, it is characterized in that: the length of described chimney filter (4) is 500mm～800mm, the external diameter of chimney filter (4) is 15mm～25mm.

3. a kind of Double-filtering device for the ammonia nitrogen in high density the water treatment according to claim 1 and 2, it is characterized in that: the aperture of each the circular micropore on the described chimney filter (4) is 5mm～10mm.

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