CN203852899U - Diluted acid filtering device - Google Patents
Diluted acid filtering device Download PDFInfo
- Publication number
- CN203852899U CN203852899U CN201420177925.9U CN201420177925U CN203852899U CN 203852899 U CN203852899 U CN 203852899U CN 201420177925 U CN201420177925 U CN 201420177925U CN 203852899 U CN203852899 U CN 203852899U
- Authority
- CN
- China
- Prior art keywords
- filtering
- filter
- tank body
- diluted acid
- bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002253 acid Substances 0.000 title claims abstract description 29
- 238000001914 filtration Methods 0.000 title abstract description 18
- 238000005452 bending Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 37
- 229910052697 platinum Inorganic materials 0.000 abstract description 17
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 12
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 12
- 239000012535 impurity Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 5
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000638 solvent extraction Methods 0.000 abstract 2
- 239000010409 thin film Substances 0.000 abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Abstract
The utility model relates to a diluted acid filtering device used for nitric acid production. The diluted acid filtering device comprises a tank body and a cover body, wherein a filtering and recovering unit is arranged on a partitioning plate fixed on the inner wall of the tank body and is composed of a filtering-bag connecting plate, a filtering bag and a net pocket; the filtering bag is arranged on the filtering-bag connecting plate; the net pocket is fixed outside the filtering bag; the filtering unit is fixed in the tank body by the partitioning plate fixed on the inner wall of the tank body; the filtering and recovering unit is provided with a microporous thin-film type filtering bag made of polytetrafluoroethylene; and the filtering accuracy of the thin-film type filtering bag is less than or equal to 5mu m. The diluted acid filtering device has the advantages that insoluble impurities such as platinum ash and oil entrained in diluted acid can be effectively removed, the filtering efficiency is more than 98% and reaches 99.9% at most, and the recovering effect is good.
Description
Technical field
The utility model relates to a kind of diluted acid filter, and especially a kind of diluted acid for double pressurized method nitric acid production enters the filter 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.Because platinum is a kind of noble metal, in traditional nitric acid production technique, be conventionally also provided with the retracting device of platinum.Traditional platinum retracting device is a kind of recycling network method retracting device, it is to be arranged in platinum guaze below using the palladium net of one or more shape same with platinum guaze, size as recycling network, the gas coming from platinum guaze, after collecter ring, is understood some platinum slag being got off by air-flow band and 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 that the installation site of recycling network in oxidation furnace and mounting structure require is very high, therefore increase equipment investment and the installation difficulty of oxidation furnace.
Summary of the invention
The purpose of this utility model is to provide the filter of the diluted acid in a kind of nitric acid production, be a kind of being arranged on diluted acid pipeline, filter and impurity recovery for diluted acid, be intended to improve product quality, improve the rate of recovery of platinum, thereby reduce oxidation furnace equipment installation difficulty and device operation cost.
The technical solution of the utility model is: a kind of nitric acid production diluted acid filter that is used for, comprise a tank body 6, and be provided with a lid 1 in the upper end of this tank body 6, on described lid, be provided with exhaust outlet 10 and pressure gauge mouth 11.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 utlity model has following characteristics:
1, the utility model is avoided 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 utility model, 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 utility model simple in structure, volume is little, energy consumption is low, small investment;
4, filter element of the present utility model, dismounting and easy for installation, is beneficial to overhaul of the equipments;
5, filter bag element of the present utility model 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 utility model 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 utility model 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 utility model 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 utility model
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
Embodiment of the present utility model is as follows: as shown in Figure 1, diluted acid filter of the present utility model comprises: a tank body 6, is provided with exhaust outlet 10 and pressure gauge mouth 11 in the upper end of this tank body 6.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 below on dividing plate 8.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 being fixed on the dividing plate 8 on tank body 6 inwalls, described filtered and recycled unit 2 is taking polytetrafluoroethylene (PTFE) as raw material, the one forming has micro porous film-type filter bag, and the filtering accuracy of this film-type filter bag is≤5 μ m.
The course of work of the present utility model is: the rare nitric acid with impurity enters 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.
Open tank body 6 convenience when clearing up, this device is provided with the revolution boom structure of a lid 1 on the top of described tank body 6, and this revolution boom structure comprises the supporting base connecting firmly on tank wall, is located at the swivel sleeve on this supporting base.On described lid, be provided with a shadoof, described shadoof is a screw rod 11, and this screw rod is arranged on described mounting ear by nut.A large-scale handwheel is equipped with on screw rod top.
Cleaning when filter element, first unscrews 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 (2)
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: the building block of described filtered and recycled unit (2) is filter bag connecting plate, is arranged on the filter bag on filter bag connecting plate and is fixed on the string bag (3) outside filter bag.
3. diluted acid filter as claimed in claim 1, it is characterized in that: described device is also provided with hood-opening device, described hood-opening device comprises the revolution boom structure (13) and the shadoof that are arranged on lid (1), 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177925.9U CN203852899U (en) | 2014-04-14 | 2014-04-14 | Diluted acid filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177925.9U CN203852899U (en) | 2014-04-14 | 2014-04-14 | Diluted acid filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203852899U true CN203852899U (en) | 2014-10-01 |
Family
ID=51602780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420177925.9U Expired - Lifetime CN203852899U (en) | 2014-04-14 | 2014-04-14 | Diluted acid filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203852899U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103877767A (en) * | 2014-04-14 | 2014-06-25 | 天脊煤化工集团股份有限公司 | Dilute acid filtering device and using method thereof |
-
2014
- 2014-04-14 CN CN201420177925.9U patent/CN203852899U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103877767A (en) * | 2014-04-14 | 2014-06-25 | 天脊煤化工集团股份有限公司 | Dilute acid filtering device and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |
|
| CX01 | Expiry of patent term |