CN103877767A - Dilute acid filtering device and using method thereof - Google Patents
Dilute acid filtering device and using method thereof Download PDFInfo
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- CN103877767A CN103877767A CN201410147228.3A CN201410147228A CN103877767A CN 103877767 A CN103877767 A CN 103877767A CN 201410147228 A CN201410147228 A CN 201410147228A CN 103877767 A CN103877767 A CN 103877767A
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- filter
- filter bag
- tank body
- filtering
- lid
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Abstract
The invention relates to a dilute acid filtering device and a using method of the dilute acid filtering device. The dilute acid filtering device comprises a tank body and a cover body, wherein a filtering and recovering unit is arranged on a clapboard on an inner wall of the tank body; the filtering and recovering unit consists of a filter bag connecting plate, a filter bag arranged on the filter bag connecting plate, and a net bag fixed outside the filter bag; the filtering unit is fixed in the tank body through the clapboard fixed on the inner wall of the tank body; the filtering and recovering unit takes polytetrafluoroethylene as a raw material and forms a film type filter bag with microporosity; the filtering precision of the film type filter bag is less than or equal to 5 mum. Platinum dust, oil and other insoluble impurities entrained in the dilute acid can be effectively removed, the filtering efficiency can be over 98 percent, the highest filtering efficiency is 99.9 percent, and the recovery effect is good.
Description
Technical field
The present invention relates to diluted acid filter and using method thereof in a kind of nitric acid production, the diluted acid being particularly useful in double pressurized method nitric acid production enters the filtration before absorption tower.
Background technology
Nitric acid, as a kind of important industrial chemicals, is widely used in the numerous areas such as chemical fertilizer production and national defense industry.In nitric acid production technique, what generally adopt is the contact catalysis oxidizing process of ammonia, its primary raw material is ammonia and air, by ammonia and air in oxidation furnace by carry out the catalytic oxidation of ammonia on the net at catalyst platinum, generate nitric oxide gas, nitric oxide is further oxidized and generates nitrogen dioxide again through cooling, and nitrogen dioxide is finally absorbed and generates nitric acid by water.The condensation acid of collecting in system in this process and diluted acid will be sent into absorption tower and recycle, and in diluted acid, contain much impurity, as: platinum slag, oil, foreign material etc., these foreign material enter absorption system can affect system operation, destroy product quality, and cause very large waste because noble metal is wherein out in the cold, thereby further improved operation cost.Metal platinum on platinum guaze is the catalyst of ammoxidation reaction, and in nitric acid production, platinum guaze is in use subject to washing away of high temperature and air-flow, and physical change can occur, and particulate is taken away by air-flow, finally enters in diluted acid.
At present, in traditional nitric acid production technique both domestic and external, be conventionally also provided with the retracting device of platinum, it is generally a kind of recycling network method retracting device, this device is by one or more shape same with platinum guaze, the palladium net of size is arranged in platinum guaze below as recycling network, the gas coming from platinum guaze is after collecter ring, understanding some platinum slag being got off by air-flow band is trapped in recycling network, but the platinum rate of recovery of this device is lower, be about 55% left and right, and because the air-flow of recycling network during sometimes by start-stop car tears, so installation site and the mounting structure of recycling network in oxidation furnace requires very high, therefore equipment investment and the installation difficulty of oxidation furnace have been increased.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of cost low, effectively diluted acid filter and the using method thereof of filtered and recycled impurity.
On the one hand, the invention provides a kind of diluted acid filter, this device comprises the closed container being made up of tank body 6 and lid 1, in described tank body 6, be provided with dividing plate 8 container is divided into the admission chamber on top and the filter chamber of bottom, feed tube 7 enters from filter chamber sidewall, and the hole on connecting partition 8 leads to admission chamber, and filtered and recycled unit 2 is arranged on dividing plate 8, be positioned at filter chamber, be provided with a drain pipe 5 in the bottom of described tank body 6.
One preferred embodiment in, described filtered and recycled unit 2 is by filter bag connecting plate, is arranged on the filter bag on filter bag connecting plate and the string bag 3 that is fixed on outside filter bag forms.
Another preferred embodiment in, this device is also provided with hood-opening device, described hood-opening device comprises being arranged on and turns boom structure 13 and shadoof on lid, described revolution boom structure 13 comprises the supporting base connecting firmly on tank wall, be located at the swivel sleeve on this supporting base, be inserted in the upper bending revoliving arm in this swivel sleeve, on this, the bending termination of bending revoliving arm is provided with a mounting ear, described shadoof is a screw rod 11, on these screw rod 11 tops, a large-scale handwheel is housed, this screw rod 11 is arranged on above-mentioned mounting ear by nut 9.
Another preferred embodiment in, on described lid 1, be provided with exhaust outlet 10 and pressure gauge mouth 11.
On the other hand, the invention provides a kind of using method of diluted acid filter, the method comprises: 1) by the rare nitric acid with impurity from dividing plate below after buffering, send into admission chamber and filter; 2) the rare nitric acid after filtration enters operation below after discharging; 3) process after a period of time, device quits work, and opens exhaust outlet, makes the air pressure in tank body identical with the outer air pressure of tank body, opens lid, takes out filter bag clearing and retrieving.
One preferred embodiment in, after cleaning, filter bag can be reinstalled in device and use.
Another preferred embodiment in, described filter bag element can be made up of tetrafluoroethene materials processing.
The present invention is owing to adopting above technical scheme, and tool has the following advantages:
1, the present invention avoids collecter ring device is installed in oxidation furnace, has reduced investment and the installation difficulty of oxidation furnace equipment;
2, filtering accuracy≤5 μ m of the present invention, can effectively remove the insoluble impurity of platinum ash, wet goods of carrying secretly in diluted acid
Filter efficiency can reach more than 98%, is up to 99.9%, and recovering effect is good;
3, of the present invention simple in structure, volume is little, energy consumption is low, small investment;
4, filter element of the present invention, dismounting and easy for installation, is beneficial to overhaul of the equipments;
5, filter bag element of the present invention is processed into by polytetrafluoroethylmaterial material, and life cycle and life-span reach more than 2 years, and after the platinum powder dirt that filters down is reclaimed, filter bag can Reusability, and operating cost is low;
6, the diluted acid inlet pipeline in the present invention enters admission chamber from dividing plate below, and acid solution has obtained buffering after entering admission chamber, has slowed down the impact of diluted acid to filter, has reduced the concussion of equipment simultaneously;
7, the lid in the present invention is provided with steam vent and pressure gauge mouth, can change and regulate cavity pressure according to pressure, judges filter bag result of use simultaneously, reclaims in time replacing;
8, the filter bag in the present invention has added one deck string bag outward, is used for firm filter bag, avoids along with increasing service time, acid solution flow velocity is when too fast, causes filter bag obscission.
Brief description of the drawings
Accompanying drawing 1 is overall structure schematic diagram of the present invention
1-lid, 2-filter element, 3-mesh bag, 4-supporting leg, 5-drain pipe, 6-tank body; 7-feed tube; 8-dividing plate; 9-set bolt; 10-exhaust outlet, 11-screw rod, 12-pressure gauge mouth; 13-turns round boom structure.
Detailed description of the invention
Embodiments of the invention are as follows: as shown in Figure 1, this diluted acid filter comprises a tank body 6, are provided with a lid 1 in the upper end of this tank body 6, are provided with exhaust outlet 10 and pressure gauge mouth 11 on described lid.A dividing plate 8 is installed in the cavity of described tank body, tank body is divided into two parts, top is admission chamber, and bottom is filter chamber.Diluted acid inlet pipeline enters from dividing plate 8 belows, connects admission chamber by the hole on dividing plate 8 from below.Be provided with a drain pipe 5 in the bottom of the filter chamber of described tank body 6, on the dividing plate 8 of described tank body 6 inwalls, filtered and recycled unit 2 is installed, described filtered and recycled unit 2 by filter bag connecting plate, be arranged on the filter bag on filter bag connecting plate and the string bag 3 that is fixed on outside filter bag forms, described filter element 2 is fixed in described tank body 6 by the dividing plate 8 being fixed on tank body 6 inwalls, described filtered and recycled unit 2 is taking polytetrafluoroethylene (PTFE) as raw material, form one and there is micro porous film-type filter bag, and the filtering accuracy of this film-type filter bag is≤5 μ m.Be provided with the revolution boom structure 13 of a lid 1 on the top of described tank body 6, this revolution boom structure 13 comprises: be fixed on a supporting base on tank wall, be located at the swivel sleeve on this supporting base, be inserted in the upper bending revoliving arm in described swivel sleeve, on the bending termination of bending revoliving arm, be provided with a mounting ear on described, on described lid, be provided with a shadoof, described shadoof is a screw rod 11, and this screw rod 11 is arranged on described mounting ear by nut 9.A large-scale handwheel is equipped with on screw rod top.
The using method of this diluted acid filter is: the rare nitric acid with impurity is entered to tank body 6 from feed tube 7, enter top admission chamber through dividing plate 8, after buffering, acid solution is by filter element 2, in rare nitric acid, platinum ash waits impurity to be intercepted in filter bag, rare nitric acid after filtration is discharged from drain pipe 5, enters operation below.The impurity of being tackled by filter bag is constantly accumulation in filter bag, and by being arranged on the pressure gauge of pressure gauge mouth 11, in the time that pressure reaches certain value, the platinum powder dirt that expression filter bag is collected has approached saturated, needs clearing and retrieving.
Wherein, cleaning when filter element, should unscrew nut 9, then on revolve screw rod 11, make lid 1 increase, then rotate upper bending revolution arm 13, make the lid rising leave tank body.At this moment, detachable and take out filter bag unit, the impurity particle in filter bag is removed, reclaim platinum powder dirt wherein, after cleaning, filter bag can be reinstalled in equipment and use.
Claims (7)
1. a diluted acid filter, comprise the closed container being formed by tank body (6) and lid (1), in described tank body (6), be provided with dividing plate (8) container is divided into the admission chamber on top and the filter chamber of bottom, feed tube (7) enters from filter chamber sidewall, hole on connecting partition (8) leads to admission chamber, it is upper that filtered and recycled unit (2) is arranged on dividing plate (8), is positioned at filter chamber, is provided with a drain pipe (5) in the bottom of described tank body (6).
2. diluted acid filter as claimed in claim 1, is characterized in that: described filtered and recycled unit (2), by filter bag connecting plate, is arranged on the filter bag on filter bag connecting plate and is fixed on the string bag (3) formation outside filter bag.
3. diluted acid filter as claimed in claim 1, it is characterized in that: be also provided with hood-opening device, described hood-opening device comprises being arranged on and turns boom structure (13) and shadoof on lid, described revolution boom structure (13) comprises the supporting base connecting firmly on tank wall, be located at the swivel sleeve on this supporting base, be inserted in the upper bending revoliving arm in this swivel sleeve, on this, the bending termination of bending revoliving arm is provided with a mounting ear, described shadoof is a screw rod (11), on this screw rod (11) top, a large-scale handwheel is housed, this screw rod (11) is arranged on above-mentioned mounting ear by nut (9).
4. diluted acid filter as claimed in claim 1, is characterized in that: on described lid (1), be provided with exhaust outlet (10) and pressure gauge mouth (11).
5. the using method of installing as claimed in claim 1, comprises the following steps:
1) by the rare nitric acid with impurity from dividing plate below after buffering, send into admission chamber and filter;
2) the rare nitric acid after filtration enters operation below after discharging;
3) process after a period of time, device quits work, and opens exhaust outlet, makes the air pressure in tank body identical with the outer air pressure of tank body, opens lid, takes out filter bag clearing and retrieving.
6. the using method of device as claimed in claim 5, is characterized in that: after cleaning, filter bag can be reinstalled in device and use.
7. the using method of device as claimed in claim 5, is characterized in that: described filter bag is made up of tetrafluoroethene materials processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410147228.3A CN103877767A (en) | 2014-04-14 | 2014-04-14 | Dilute acid filtering device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410147228.3A CN103877767A (en) | 2014-04-14 | 2014-04-14 | Dilute acid filtering device and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103877767A true CN103877767A (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410147228.3A Pending CN103877767A (en) | 2014-04-14 | 2014-04-14 | Dilute acid filtering device and using method thereof |
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| Country | Link |
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| CN (1) | CN103877767A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324615A (en) * | 2014-11-21 | 2015-02-04 | 成都瑞芬思生物科技有限公司 | Micro-filtration membrane filtering device for bio-pharmaceuticals |
| CN111410180A (en) * | 2020-04-27 | 2020-07-14 | 昆明南铂环保科技有限公司 | Nitric acid filtering and recycling device and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6249921A (en) * | 1985-08-27 | 1987-03-04 | Kurita Mach Mfg Co Ltd | Bag filter |
| DE3733699A1 (en) * | 1987-10-06 | 1989-04-20 | Jowat Lobers U Frank Gmbh & Co | Filter |
| CN202237462U (en) * | 2011-09-23 | 2012-05-30 | 北京三川世纪技术有限公司 | Filtering bag type filter |
| CN202538644U (en) * | 2012-05-07 | 2012-11-21 | 西安超滤化工有限责任公司 | Microfiltration process platinum recovery device for nitric acid production |
| CN202823021U (en) * | 2012-07-05 | 2013-03-27 | 江苏剑桥涂装工程有限公司 | Quick-opening and quick-changing bag filter |
| CN103041636A (en) * | 2012-12-28 | 2013-04-17 | 唐树青 | Bag filter |
| CN203379669U (en) * | 2013-07-23 | 2014-01-08 | 江苏福斯特化工制造有限公司 | Improved bag filter |
| CN203852899U (en) * | 2014-04-14 | 2014-10-01 | 天脊煤化工集团股份有限公司 | Diluted acid filtering device |
-
2014
- 2014-04-14 CN CN201410147228.3A patent/CN103877767A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6249921A (en) * | 1985-08-27 | 1987-03-04 | Kurita Mach Mfg Co Ltd | Bag filter |
| DE3733699A1 (en) * | 1987-10-06 | 1989-04-20 | Jowat Lobers U Frank Gmbh & Co | Filter |
| CN202237462U (en) * | 2011-09-23 | 2012-05-30 | 北京三川世纪技术有限公司 | Filtering bag type filter |
| CN202538644U (en) * | 2012-05-07 | 2012-11-21 | 西安超滤化工有限责任公司 | Microfiltration process platinum recovery device for nitric acid production |
| CN202823021U (en) * | 2012-07-05 | 2013-03-27 | 江苏剑桥涂装工程有限公司 | Quick-opening and quick-changing bag filter |
| CN103041636A (en) * | 2012-12-28 | 2013-04-17 | 唐树青 | Bag filter |
| CN203379669U (en) * | 2013-07-23 | 2014-01-08 | 江苏福斯特化工制造有限公司 | Improved bag filter |
| CN203852899U (en) * | 2014-04-14 | 2014-10-01 | 天脊煤化工集团股份有限公司 | Diluted acid filtering device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324615A (en) * | 2014-11-21 | 2015-02-04 | 成都瑞芬思生物科技有限公司 | Micro-filtration membrane filtering device for bio-pharmaceuticals |
| CN111410180A (en) * | 2020-04-27 | 2020-07-14 | 昆明南铂环保科技有限公司 | Nitric acid filtering and recycling device and method |
| CN111410180B (en) * | 2020-04-27 | 2024-03-29 | 昆明南铂环保科技有限公司 | Nitric acid filtering and recycling device and method |
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Application publication date: 20140625 |