CN105413302A - Filter cloth online circulation washing system and method of titanium dioxide water washing leaf filter - Google Patents

Filter cloth online circulation washing system and method of titanium dioxide water washing leaf filter Download PDF

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Publication number
CN105413302A
CN105413302A CN201511020768.6A CN201511020768A CN105413302A CN 105413302 A CN105413302 A CN 105413302A CN 201511020768 A CN201511020768 A CN 201511020768A CN 105413302 A CN105413302 A CN 105413302A
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China
Prior art keywords
filter cloth
hydrofluoric acid
filter
liquid
storage tank
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Application number
CN201511020768.6A
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Chinese (zh)
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CN105413302B (en
Inventor
杨金源
王荣凯
彭磊
胡云友
王胜华
陈川
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PANZHIHUA DONGFANG TITANIUM Co Ltd
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PANZHIHUA DONGFANG TITANIUM Co Ltd
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Priority to CN201511020768.6A priority Critical patent/CN105413302B/en
Publication of CN105413302A publication Critical patent/CN105413302A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid

Abstract

The invention discloses a filter cloth online circulation washing system and method of a titanium dioxide water washing leaf filter. The system comprises a hydrofluoric acid storage tank, a filter cloth washing tank, and a gas-liquid separator; the bottom of the hydrofluoric acid storage tank is provided with a liquid sealed groove; the material outlet of the hydrofluoric acid storage tank is connected to the liquid inlet of the filter cloth washing tank, a hydrofluoric acid pump is arranged between the hydrofluoric acid storage tank and the filter cloth washing tank, the upper part of the filter cloth washing tank is provided with a liquid overflow opening, the liquid overflow opening is connected to the hydrofluoric acid storage tank, a leaf filtering machine is arranged in the filter cloth washing tank, the gas outlet of the leaf filtering machine is connected to the gas-liquid separator, the gas outlet of the gas-liquid separator is connected to a vacuum pump, and the liquid outlet of the gas-liquid separator is connected to a liquid outlet pipe, which is inserted to the bottom of the liquid sealed groove in the hydrofluoric acid storage tank. The washing time of filter cloth is short, the washing efficiency is high, the water washing of titanium dioxide can be carried out successfully, the production efficiency of titanium dioxide is improved, at the same time, the hydrofluoric acid washing liquid can be repeatedly used, the loss of hydrofluoric acid washing liquid is avoided, the consumption of hydrofluoric acid is reduced, and the pollution to the environment is reduced.

Description

The online circulation cleaning system and method for a kind of titanium white washing leaf filter filter cloth
Technical field
The present invention relates to the online circulation cleaning system and method for a kind of titanium white washing leaf filter filter cloth, belong to titanium white production technical field.
Background technology
The object of titanium white washing is the Fe washed away in metatitanic acid 2+, the general leaf-type vacuum filter that uses carries out.Leaf-type vacuum filter, in titanium white water-washing process, always has the filter cloth eyelet of a small amount of metatitanic acid micelle blocking leaf filter, affects water washing effect.Along with the prolongation of service time, blocked filter cloth eyelet gets more and more, simultaneously fiber aging after follow the string and also make filter cloth more easily be blocked by material particles, have a strong impact on production efficiency and quality after filter cloth blocking, therefore need to regularly replace or the filter cloth of washing leaf filter.Change filter cloth cost high, during replacing, spend a large amount of manpower and materials, so in producing unless it is necessary, can not change filter cloth, actual production adopts mode of washing usually, periodic cleaning filter cloth, dredges blocked mesh.
The metatitanic acid of blocking filter cloth is water insoluble, is not soluble in general acid or alkali under normal temperature.So common machine washing is difficult to reach predetermined clean result.But because metatitanic acid can react with hydrofluoric acid, therefore titanium white filter cloth often uses hydrofluoric acid wash.Mounting means due to titanium powder industry leaf filter filter cloth used and equipment determines leaf filter filter cloth and washs and arbitrarily can not pull down washing from leaf filter, is usually that filter plate and filter cloth are together immersed in the solution of hydrofluoric acid containing in production.Each factory generally adopts hydrofluoric acid dips in recent years.But due to the volatility of hydrofluoric acid, corrosivity and toxicity etc., therefore use and often often use at low concentrations, it is long that low concentration hydrofluoric acid soaks required time, and immersion effect is bad, has a strong impact on production efficiency.
Summary of the invention
In view of this, the invention provides one and can improve titanium white washing leaf filter filter cloth clean result, shorten the online circulation cleaning system and method for filter cloth of wash time.
For solving above technical problem, technical scheme of the present invention is for adopting the online circulation cleaning system of a kind of titanium white washing leaf filter filter cloth, it comprises hydrofluoric acid storage tank, filter cloth kitchen sink and gas-liquid separator, hydrofluoric acid tank bottom is equipped with liquid seal trough, hydrofluoric acid reservoir outlet connects filter cloth kitchen sink inlet, hydrofluoric acid pump is set between hydrofluoric acid storage tank and filter cloth kitchen sink, filter cloth kitchen sink top arranges liquid spill-way, liquid spill-way connects hydrofluoric acid storage tank, leaf filter is placed in filter cloth kitchen sink, leaf filter gas outlet connects gas-liquid separator, gas-liquid separator gas outlet connects vavuum pump, gas-liquid separator liquid outlet connects drain pipe insertion and is placed in bottom the liquid seal trough in hydrofluoric acid storage tank.Further, arrange discharging hole bottom filter cloth kitchen sink, discharging hole connects hydrofluoric acid storage tank, and easy cleaning overhauls.
Meanwhile, present invention also offers the method according to above-mentioned titanium white washing leaf filter filter cloth online circulation cleaning system washing filter cloth, it comprises the following steps:
(1) leaf filter entirety is placed on filter cloth kitchen sink, ensures that the filter plate of leaf filter and filter cloth are placed in filter cloth kitchen sink;
(2) start hydrofluoric acid pump, when being full of 1/2-2/3 liquid in filter cloth kitchen sink, start vavuum pump.
Hydrofluoric acid in hydrofluoric acid storage tank is pumped in filter cloth kitchen sink by hydrofluoric acid, hydrofluoric acid in filter cloth kitchen sink passes filter cloth under negative pressure of vacuum effect, and react with metatitanic acid the metatitanic acid dissolved in filter cloth eyelet, gas-liquid separator is entered from leaf filter gas outlet through filter plate hollow tube, final be back to liquid seal trough by gas-liquid separator separates and overflow to hydrofluoric acid storage tank, the unreacted hydrofluoric acid of backflow carries out filter cloth washing being pumped to filter cloth kitchen sink by hydrofluoric acid, thus achieves the online circulation cleaning of filter cloth.
Further, consider the volatility of hydrofluoric acid, corrosivity and toxicity, in above-mentioned hydrofluoric acid storage tank, the working concentration of hydrofluoric acid is 3% ~ 5%.
Further, consider volatility and the toxicity of hydrofluoric acid, liquid seal trough is placed in hydrofluoric acid storage tank, prevents its volatilization, outflow.Fluid-tight liquid in liquid seal trough is the hydrofluoric acid refluxed by gas-liquid separator, liquid seal trough is placed in hydrofluoric acid storage tank, in liquid seal trough the hydrofluoric acid of backflow be full of liquid seal trough and overflow to hydrofluoric acid storage tank, even if hydrofluoric acid has been beaten by hydrofluoric acid pump, also enough hydrofluoric acid is had, to play fluid-tight effect in liquid seal trough.
Further, due to the corrosivity of hydrofluoric acid, the material selection PVC plastic of described gas-liquid separator.
Further, described liquid seal trough is placed in hydrofluoric acid storage tank, prevents hydrofluoric acid from leaking, reinforcing security.
Existing filter cloth washing is washed by static soak and is changed online circulation cleaning into by the present invention, cleaning solution hydrofluoric acid is flowed, enhance the contact effect of hydrofluoric acid and filter cloth, shorten filter cloth wash time, reach same clean result the inventive method time shorten 3-4 hour, substantially increase detersive efficiency.Simultaneously online circulation cleaning system provided by the invention, systemic circulation, cleaning solution hydrofluoric acid is circulation Reusability, because this reducing the loss of hydrofluoric acid and hydrofluoric acid to the pollution of environment.
Therefore, filter cloth wash time of the present invention is short, and detersive efficiency is high, ensure that carrying out smoothly of titanium white washing step, improves Producing Titanium Dioxide efficiency, and the liquid of hydrofluoric acid wash is simultaneously recycled, and does not run off, reduces the loss of hydrofluoric acid and the pollution to environment thereof.
Accompanying drawing explanation
Fig. 1 is the structural representation of present system;
Fig. 2 is the schematic top plan view that leaf filter is placed in filter cloth kitchen sink.
Marginal data:
1, hydrofluoric acid storage tank; 2, filter cloth kitchen sink; 21, liquid spill-way; 22, discharging hole; 3, gas-liquid separator; 4, hydrofluoric acid pump; 5, vavuum pump; 6, liquid seal trough; 7, leaf filter; 71, leaf filter gas outlet; 72, filter cloth and filter plate; 73, hollow tube; 8, drain pipe.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with detailed description of the invention, the present invention is described in further detail.
See Fig. 1, the invention provides the online circulation cleaning system of a kind of titanium white washing leaf filter filter cloth, it comprises hydrofluoric acid storage tank 1, filter cloth kitchen sink 2 and gas-liquid separator 3, considers volatility and the toxicity of hydrofluoric acid, be equipped with liquid seal trough 6 bottom hydrofluoric acid storage tank 1, prevent hydrofluoric acid from leaking; Hydrofluoric acid storage tank 1 discharging opening connects filter cloth kitchen sink 2 inlet, hydrofluoric acid pump 4 is set between hydrofluoric acid storage tank 1 and filter cloth kitchen sink 2, filter cloth kitchen sink 2 top arranges liquid spill-way 21, liquid spill-way 21 connects hydrofluoric acid storage tank 1, place leaf filter 7 in filter cloth kitchen sink 2, leaf filter gas outlet 71 connects gas-liquid separator 3, and gas-liquid separator 3 gas outlet connects vavuum pump 5, gas-liquid separator 3 liquid outlet connects drain pipe 8, and drain pipe 8 insertion is placed in bottom the liquid seal trough in hydrofluoric acid storage tank.Further, arrange discharging hole 22 bottom filter cloth kitchen sink 2, discharging hole 22 connects hydrofluoric acid storage tank, and easy cleaning overhauls.
See Fig. 1, Fig. 2, leaf filter 7 is placed on filter cloth kitchen sink 2, the filter cloth of leaf filter and filter plate 72 are placed in filter cloth kitchen sink 2, hydrofluoric acid in hydrofluoric acid storage tank 1 is delivered in filter cloth kitchen sink 2 by hydrofluoric acid pump 4, hydrofluoric acid in filter cloth kitchen sink 2 passes filter cloth under negative pressure of vacuum effect, and react with metatitanic acid the metatitanic acid dissolved in filter cloth eyelet, gas-liquid separator 3 is entered from leaf filter gas outlet 71 through filter plate hollow tube 73, finally by gas-liquid separator 3 be separated be back to liquid seal trough 6 and overflow to hydrofluoric acid storage tank 1, the unreacted hydrofluoric acid of backflow carries out filter cloth washing delivering to filter cloth kitchen sink by hydrofluoric acid pump 4, thus achieve the online circulation cleaning of filter cloth.
Use washing by soaking and online circulation cleaning two kinds of methods to wash the leaf filter filter cloth of same size size and filter opening blocked area below respectively, and be described for respective clean result.
Embodiment 1:
Titanium white washing leaf filter filter cloth is washed by above-mentioned online circulation cleaning system, cleaning solution hydrofluoric acid concentration used is 3%, first leaf filter is placed on filter cloth kitchen sink, ensure that its filter cloth and filter plate are placed in filter cloth kitchen sink, start hydrofluoric acid pump, when being full of 1/2 liquid in filter cloth kitchen sink, start vavuum pump, after system cloud gray model 3.6h, termination of pumping stops washing.Clean result is: filter cloth filter opening blocked area is 0.3%.
Embodiment 2:
Titanium white washing leaf filter filter cloth is washed by above-mentioned online circulation cleaning system, cleaning solution hydrofluoric acid concentration used is 3%, first leaf filter is placed on filter cloth kitchen sink, ensure that its filter cloth and filter plate are placed in filter cloth kitchen sink, start hydrofluoric acid pump, when being full of 2/3 liquid in filter cloth kitchen sink, start vavuum pump, after system cloud gray model 3h, termination of pumping stops washing.Clean result is: filter cloth filter opening blocked area is 0.2%.
Embodiment 3:
Washing by soaking, cleaning solution hydrofluoric acid concentration is 3%, and the filter cloth of leaf filter and filter plate are immersed in hydrofluoric acid wash pond and take out after 5.5h, clean result is: filter cloth filter opening blocked area is 0.4%.
Embodiment 4:
Washing by soaking, cleaning solution hydrofluoric acid concentration is 3%, and the filter cloth of leaf filter and filter plate are immersed in hydrofluoric acid wash pond and take out after 6h, clean result is: filter cloth filter opening blocked area is 0.3%.
To sum up, can find out, online circulation cleaning method provided by the invention is than traditional washing by soaking method, and reach same clean result, wash time can shorten over half, and detersive efficiency is greatly enhanced.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred embodiment should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (5)

1. the online circulation cleaning system of titanium white washing leaf filter filter cloth, it is characterized in that: comprise hydrofluoric acid storage tank, filter cloth kitchen sink and gas-liquid separator, hydrofluoric acid tank bottom is equipped with liquid seal trough, hydrofluoric acid reservoir outlet connects filter cloth kitchen sink inlet, hydrofluoric acid pump is set between hydrofluoric acid storage tank and filter cloth kitchen sink, filter cloth kitchen sink top arranges liquid spill-way, liquid spill-way connects hydrofluoric acid storage tank, leaf filter is placed in filter cloth kitchen sink, leaf filter gas outlet connects gas-liquid separator, gas-liquid separator gas outlet connects vavuum pump, gas-liquid separator liquid outlet connects drain pipe insertion and is placed in bottom the liquid seal trough in hydrofluoric acid storage tank.
2. the online circulation cleaning system of a kind of titanium white washing leaf filter filter cloth according to claim 1, it is characterized in that: arrange discharging hole bottom filter cloth kitchen sink, discharging hole connects hydrofluoric acid storage tank.
3. the online circulation cleaning system of a kind of titanium white washing leaf filter filter cloth according to claim 1, is characterized in that: in described hydrofluoric acid storage tank, the concentration of hydrofluoric acid is 3% ~ 5%.
4. the online circulation cleaning system of a kind of titanium white washing leaf filter filter cloth according to claim 1, is characterized in that: the material selection PVC plastic of described gas-liquid separator.
5. a method for titanium white washing leaf filter filter cloth according to claim 1 online circulation cleaning system washing filter cloth, is characterized in that: comprise the following steps:
(1) leaf filter entirety is placed on filter cloth kitchen sink, ensures that the filter plate of leaf filter and filter cloth are placed in filter cloth kitchen sink;
(2) start hydrofluoric acid pump, when being full of 1/2-2/3 liquid in filter cloth kitchen sink, start vavuum pump.
CN201511020768.6A 2015-12-30 2015-12-30 A kind of titanium white washing leaf filter filter cloth recycles washing system and method online Active CN105413302B (en)

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CN201511020768.6A CN105413302B (en) 2015-12-30 2015-12-30 A kind of titanium white washing leaf filter filter cloth recycles washing system and method online

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CN201511020768.6A CN105413302B (en) 2015-12-30 2015-12-30 A kind of titanium white washing leaf filter filter cloth recycles washing system and method online

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493391A (en) * 2018-04-17 2018-09-04 广州汽车集团乘用车有限公司 Coolant injection system, device and method for battery cooling system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5673513A (en) * 1979-11-21 1981-06-18 Mitsui Toatsu Chem Inc Filter device
CN2536285Y (en) * 2002-03-19 2003-02-19 东华工程科技股份有限公司 Vacuum leaf filters
CN1676192A (en) * 2004-04-01 2005-10-05 上海宏力半导体制造有限公司 Cleaning device for use in cleaning liquid circulating system for increasing filter life
CN202438189U (en) * 2012-02-27 2012-09-19 漯河兴茂钛业股份有限公司 Vacuum blade filtering machine for titanium dioxide production
CN203281114U (en) * 2013-05-27 2013-11-13 核工业烟台同兴实业有限公司 Disc-type ceramic filter on-line circulation cleaning device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5673513A (en) * 1979-11-21 1981-06-18 Mitsui Toatsu Chem Inc Filter device
CN2536285Y (en) * 2002-03-19 2003-02-19 东华工程科技股份有限公司 Vacuum leaf filters
CN1676192A (en) * 2004-04-01 2005-10-05 上海宏力半导体制造有限公司 Cleaning device for use in cleaning liquid circulating system for increasing filter life
CN202438189U (en) * 2012-02-27 2012-09-19 漯河兴茂钛业股份有限公司 Vacuum blade filtering machine for titanium dioxide production
CN203281114U (en) * 2013-05-27 2013-11-13 核工业烟台同兴实业有限公司 Disc-type ceramic filter on-line circulation cleaning device

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108493391A (en) * 2018-04-17 2018-09-04 广州汽车集团乘用车有限公司 Coolant injection system, device and method for battery cooling system

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Denomination of invention: An online circulating washing system and method for titanium dioxide water leaf washing filter cloth

Effective date of registration: 20231207

Granted publication date: 20181113

Pledgee: Agricultural Bank of China Limited Miyi County Branch

Pledgor: PANZHIHUA DONGFANG TITANIUM INDUSTRY CO.,LTD.

Registration number: Y2023980069498

PE01 Entry into force of the registration of the contract for pledge of patent right