CN203389506U - Device for recycling and purifying phosphoric acid in tail gas produced by chemical production of activated carbon - Google Patents
Device for recycling and purifying phosphoric acid in tail gas produced by chemical production of activated carbon Download PDFInfo
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- CN203389506U CN203389506U CN201320509487.7U CN201320509487U CN203389506U CN 203389506 U CN203389506 U CN 203389506U CN 201320509487 U CN201320509487 U CN 201320509487U CN 203389506 U CN203389506 U CN 203389506U
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Abstract
The utility model discloses a device for recycling and purifying phosphoric acid in tail gas produced by chemical production of activated carbon. The device comprises a phosphoric acid absorption system, a waste gas secondary purifying system and a filtering and recycling system, wherein the phosphoric acid absorption system comprises a phosphoric acid primary absorption tower, a phosphoric acid primary absorption pump, a phosphoric acid secondary absorption tower, a phosphoric acid secondary absorption pump and a circulating liquid tank; the waste gas secondary purifying system comprises a lime water spraying absorption tower and an induced draft fan; the filtering and recycling system comprises a filtering pump, a filter press and a drying bed. The device purifies and recycles the tail gas by a three-stage serial connection mode and can fulfill the recycling aim by performing reverse contact on a high-concentration phosphoric acid circulating liquid and waste gas containing high-concentration phosphoric acid and completely purify the waste gas by performing secondary reverse contact on a low-concentration phosphoric acid circulating liquid and primarily purified gas and finally performing limestone treatment. The recycling and purifying device improves the phosphoric acid recycling rate; the loss of the phosphoric acid is reduced, and the recycled phosphoric acid liquid is high in concentration and has a direct reuse value.
Description
Technical field
The utility model relates to the technical field that chemical method is produced active carbon, and specifically chemical method is produced phosphoric acid recovery and purifier in active carbon tail gas.
Background technology
After the wood of take processing leftover bits and pieces---wood chip is raw material, with phosphoric acid, zinc chloride activation agent activation, produce in the process of active carbon, because phosphoric acid has dehydration and oxidation to material, can make low-temperature material charing and be oxidized, every material consumption is low, cost is low, effect is better, is the effective way of mountain development distinctive industry.But a large amount of high-density phosphorus acid that emit in active carbon by chemical method is produced are the waste gas of representative, to surrounding environment, cause serious harm, especially phosphoric acid, zinc chloride activation method are even more serious, according to 1 ton of active carbon of the every production of measuring and calculating, will consume approximately 300 ~ 350kg phosphoric acid.To this, traditional solution is WATER-WASHING METHOD, but due to the acid meeting heavy corrosion pipeline and the equipment that form after water absorption, and phosphoric acid cannot absorb, and causes the wasting of resources.And current technique is generally used single-stage circulation to absorb, but along with the increase of absorption strength, it is saturated that absorption liquid is slowly tending towards, and makes assimilation effect variation, and the phosphoric acid rate of recovery is low, has wasted resource, and environmental pollution regulation effect is also not obvious.
Utility model content
The utility model provides a kind of chemical method to produce phosphoric acid in active carbon tail gas and has reclaimed and purifier, and it is low that its object is to overcome the phosphoric acid rate of recovery that prior art exists, the defect to environmental improvement weak effect.
The utility model adopts following technical scheme:
A kind of chemical method is produced phosphoric acid in active carbon tail gas and is reclaimed and purifier, comprise phosphoric acid absorption system, secondary exhaust gas cleaning system and filtering recovering system, described phosphoric acid absorption system comprises phosphoric acid Yi Ci absorption tower, absorption pump of phosphoric acid, phosphoric acid secondary absorption tower, phosphoric acid secondary absorption pump and circulation liquid bath, described secondary exhaust gas cleaning system comprises limewash spray absorber and air-introduced machine, described filtering recovering system comprises filter pump, filter press and mummifying pool, described phosphoric acid Yi Ci absorption tower, phosphoric acid secondary absorption tower, limewash spray absorber and air-introduced machine connect successively, phosphoric acid Yi Ci absorption tower, phosphoric acid secondary absorption tower is connected to respectively on the inlet tube of circulation liquid bath, described circulation liquid bath is also connected to respectively described phosphoric acid Yi Ci absorption tower and phosphoric acid secondary absorption tower by absorption pump of described phosphoric acid and phosphoric acid secondary absorption pump, the outlet of circulation liquid bath is connected to filter pump by pipeline, filter delivery side of pump and be connected to filter press.
Further, described phosphoric acid Yi Ci absorption tower is provided with at least two-layer shower and two-layer card, the mutual alternatively up and down of described shower and card distributes, the card below that is positioned at the bottom is provided with an exhaust gas inlet, the top on this phosphoric acid Yi Ci absorption tower is provided with primary purification waste gas outlet, bottom is provided with absorption liquid outlet, and described circulation liquid bath is connected to the shower on phosphoric acid Yi Ci absorption tower by absorption pump of described phosphoric acid.
Further, described phosphoric acid secondary absorption tower is provided with double purification waste gas outlet, water sprayer tube, the outlet of water spray liquid, the fluted card of marginal belt, phosphoric acid,diluted shower, card, primary purification exhaust gas inlet and absorption liquid outlet from top to bottom successively, described circulation liquid bath is connected to the phosphoric acid,diluted shower on phosphoric acid secondary absorption tower by phosphoric acid secondary absorption pump, a phosphoric acid,diluted shower and a card formation are a set of, and described phosphoric acid secondary absorption tower at least comprises a set of phosphoric acid,diluted shower and card.
Further, described circulation liquid bath is four, wherein, two circulation fluids that are respectively used to fill phosphoric acid Yi Ci absorption tower and phosphoric acid secondary absorption tower, an absorption liquid spraying for filling water, another is as drain spareslots; Each circulation liquid bath is respectively equipped with three inlet tubes and three outlets, three inlet tubes are connected to respectively the absorption liquid outlet of phosphoric acid Yi Ci absorption tower, the outlet of phosphoric acid secondary absorption tower absorption liquid and the outlet of water spray liquid, and three outlet pipes are connected to respectively an absorption pump import of phosphoric acid, the absorption pump import of phosphoric acid secondary and filter pump import.
Each equipment all adopts corrosion-resistant, resistant to elevated temperatures phenolic resins and the fiberglass skin of modification above.
From above-mentioned, to description of the present utility model, be the utility model has the advantage of:
1, the utility model adopts three grades of series connection forms that tail gas is purified and reclaimed, and first, utilizes the phosphoric acid circulation liquid that concentration is high to contact with the waste gas that contains high-concentration phosphoric acid is reverse, is conducive to improve the concentration of circulation fluid phosphoric acid, reaches the object of recovery; The phosphoric acid,diluted circulation fluid and reverse contact of primary purification gas secondary of recycling low concentration, be conducive to primary purification gas cleaning; Finally with lime stone, process, waste gas is thoroughly purified.The utility model device and method has improved the rate of recovery of phosphoric acid, when reducing phosphoric acid loss, makes the phosphoric acid liquid bulk concentration reclaiming reach higher concentration, makes it possess the value of direct reuse.
2, the utility model is connected to limewash spray column at double purification waste gas outlet, and the unabsorbed phosphoric acid of trace is absorbed with limewash again, makes the waste gas purifying reach discharge standard, avoids surrounding enviroment contaminated.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
The specific embodiment of the present utility model is described with reference to the accompanying drawings.
With reference to Fig. 1, a kind of chemical method is produced phosphoric acid in active carbon tail gas and is reclaimed and purifier, comprises phosphoric acid absorption system, secondary exhaust gas cleaning system and filtering recovering system.Phosphoric acid absorption system comprises phosphoric acid Yi Ci absorption tower 1, absorption pump 2 of phosphoric acid, phosphoric acid secondary absorption tower 3, phosphoric acid secondary absorption pump 4 and circulation liquid bath 5, secondary exhaust gas cleaning system comprises the auxiliary devices such as limewash spray absorber 6 and air-introduced machine 7, it is the common absorption spray system in this area, filtering recovering system comprises filter pump 8, filter press 9 and mummifying pool 10, is also common filtering recovering system.Phosphoric acid Yi Ci absorption tower 1, phosphoric acid secondary absorption tower 3, limewash spray absorber 6 and air-introduced machine 7 connect successively, phosphoric acid Yi Ci absorption tower 1, phosphoric acid secondary absorption tower 3 are connected to respectively on the inlet tube of circulation liquid bath 5, the outlet of circulation liquid bath 5 is connected to filter pump 8 by pipeline, and the outlet of filter pump 8 is connected to filter press 9.
With reference to Fig. 1, the top on phosphoric acid Yi Ci absorption tower 1 is provided with primary purification waste gas outlet 11, bottom is provided with an absorption liquid outlet 12, in phosphoric acid Yi Ci absorption tower 1, be provided with two-layer the first shower 13 and two-layer the first card 14, the mutual alternatively up and down of the first shower 13 and the first card 14 distributes, the first card 14 belows that are positioned at the bottom are provided with an exhaust gas inlet 15, and circulation liquid bath 5 is connected to first shower 13 on phosphoric acid Yi Ci absorption tower 1 by absorption pump 2 of phosphoric acid.Phosphoric acid secondary absorption tower 3 is provided with double purification waste gas outlet 31, water sprayer tube 32, water spray liquid outlet 33, the fluted card 34 of marginal belt, phosphoric acid,diluted shower 35, the second card 36, primary purification exhaust gas inlet 37 and double absorption liquid outlet 38 from top to bottom successively, circulation liquid bath 5 is connected to the phosphoric acid,diluted shower 35 on phosphoric acid secondary absorption tower 3 by phosphoric acid secondary absorption pump 4, a phosphoric acid,diluted shower 35 and second card 36 formations are a set of, and a phosphoric acid secondary absorption tower 3 at least comprises a set of phosphoric acid,diluted shower 35 and the second card 36.
Continuation is with reference to Fig. 1, the total size of circulation liquid bath 5 is identical four, be respectively the first circulation liquid bath 51, the second circulation liquid bath 52, the 3rd circulation liquid bath 53 and standby circulation liquid bath 54, wherein two circulation liquid baths are respectively used to fill the circulation fluid on phosphoric acid Yi Ci absorption tower 1 and phosphoric acid secondary absorption tower 3, one for filling the absorption liquid of water spray, another is as drain spareslots, and four circulation liquid baths can be recycled; Each circulation liquid bath is respectively equipped with three inlet tubes and three outlets, three inlet tubes are connected to respectively an absorption liquid outlet 12 on phosphoric acid Yi Ci absorption tower 1, the double absorption liquid outlet 38 on phosphoric acid secondary absorption tower 3 and 33, three outlet pipes of water spray liquid outlet are connected to respectively import, the import of phosphoric acid secondary absorption pump 4 and the import of filter pump 8 of an absorption pump 2 of phosphoric acid.
Each equipment all adopts corrosion-resistant, resistant to elevated temperatures phenolic resins and the fiberglass skin of modification above.
Or with reference to Fig. 1, utilize above-mentioned recovery and purifier to produce to chemical method the method that in active carbon tail gas, phosphoric acid reclaims and purifies, comprise the following steps successively: the waste gas that (1) rotary kiln comes enters with phosphoric acid circulation liquid is reverse and contacts from 1 bottom, phosphoric acid Yi Ci absorption tower, the part phosphoric acid in waste gas is absorbed and gets back to first circulation liquid bath 51 by phosphoric acid circulation liquid; (2) primary purification waste gas enters the bottom on phosphoric acid secondary absorption tower 3 and reverse contact of phosphoric acid,diluted circulation fluid spraying from top to bottom again from 1 top, phosphoric acid Yi Ci absorption tower, phosphoric acid in waste gas is absorbed again, phosphoric acid,diluted circulation fluid is got back to second circulation liquid bath 52, the water that waste gas continues to enter the top on phosphoric acid secondary absorption tower 3 and spray is from top to bottom reverse contact again, phosphoric acid in waste gas is absorbed by water, and absorption liquid is got back to the 3rd circulation liquid bath 53; (3) double purification waste gas enters limewash spray absorber 6 from the top on phosphoric acid secondary absorption tower 3, and the phosphoric acid in double purification waste gas is absorbed by limewash, and purifying exhaust air is discharged to atmosphere through air-introduced machine 7 from 6 tops, limewash absorption tower; When the circulation fluid phosphoric acid concentration of (4) first circulation liquid baths 51 reaches 14～16 baume, circulation liquid bath is switched, the phosphoric acid Sprayer Circulation liquid that the second circulation liquid bath 52 switches for phosphoric acid Yi Ci absorption tower 1, the Sprayer Circulation liquid that the 3rd circulation liquid bath 53 switches for the phosphoric acid,diluted on phosphoric acid secondary absorption tower 3, the water spray-absorption liquid that standby circulation liquid bath 54 switches for phosphoric acid secondary absorption tower 3.The circulation fluid that simultaneously the first circulation liquid bath concentration is reached to 14～16 baume is got to filter press 9 with filter pump 8 and is carried out press filtration, and pressing filtering liquid is back to use spice workshop section, and slag enters mummifying pool 10, and above operation cycle is back and forth carried out.
Above are only the specific embodiment of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should belong to the behavior of invading the utility model protection domain.
Claims (5)
1. a chemical method is produced phosphoric acid recovery and purifier in active carbon tail gas, it is characterized in that: comprise phosphoric acid absorption system, secondary exhaust gas cleaning system and filtering recovering system, described phosphoric acid absorption system comprises phosphoric acid Yi Ci absorption tower, absorption pump of phosphoric acid, phosphoric acid secondary absorption tower, phosphoric acid secondary absorption pump and circulation liquid bath, described secondary exhaust gas cleaning system comprises limewash spray absorber and air-introduced machine, described filtering recovering system comprises filter pump, filter press and mummifying pool, described phosphoric acid Yi Ci absorption tower, phosphoric acid secondary absorption tower, limewash spray absorber and air-introduced machine connect successively, phosphoric acid Yi Ci absorption tower, phosphoric acid secondary absorption tower is connected to respectively on the inlet tube of circulation liquid bath, described circulation liquid bath is also connected to respectively described phosphoric acid Yi Ci absorption tower and phosphoric acid secondary absorption tower by absorption pump of described phosphoric acid and phosphoric acid secondary absorption pump, the outlet of circulation liquid bath is connected to filter pump by pipeline, filter delivery side of pump and be connected to filter press.
2. a kind of chemical method as claimed in claim 1 is produced phosphoric acid recovery and purifier in active carbon tail gas, it is characterized in that: described phosphoric acid Yi Ci absorption tower is provided with at least two-layer shower and two-layer card, the mutual alternatively up and down of described shower and card distributes, the card below that is positioned at the bottom is connected to an exhaust gas inlet, the top on this phosphoric acid Yi Ci absorption tower is provided with primary purification waste gas outlet, bottom is provided with absorption liquid outlet, and described circulation liquid bath is connected to the shower on phosphoric acid Yi Ci absorption tower by absorption pump of described phosphoric acid.
3. a kind of chemical method as claimed in claim 2 is produced phosphoric acid recovery and purifier in active carbon tail gas, it is characterized in that: described phosphoric acid secondary absorption tower is provided with double purification waste gas outlet, water sprayer tube, the outlet of water spray liquid, the fluted card of marginal belt, phosphoric acid,diluted shower, card, primary purification exhaust gas inlet and absorption liquid outlet from top to bottom successively, and described circulation liquid bath is connected to the phosphoric acid,diluted shower on phosphoric acid secondary absorption tower by phosphoric acid secondary absorption pump.
4. a kind of chemical method as claimed in claim 3 is produced phosphoric acid recovery and purifier in active carbon tail gas, it is characterized in that: a phosphoric acid,diluted shower and a card formation are a set of, and described phosphoric acid secondary absorption tower at least comprises a set of phosphoric acid,diluted shower and card.
5. a kind of chemical method as claimed in claim 4 is produced phosphoric acid recovery and purifier in active carbon tail gas, it is characterized in that: described circulation liquid bath is four, wherein, two circulation fluids that are respectively used to fill phosphoric acid Yi Ci absorption tower and phosphoric acid secondary absorption tower, an absorption liquid spraying for filling water, another is as drain spareslots; Each circulation liquid bath is respectively equipped with three inlet tubes and three outlets, three inlet tubes are connected to respectively the absorption liquid outlet of phosphoric acid Yi Ci absorption tower, the outlet of phosphoric acid secondary absorption tower absorption liquid and the outlet of water spray liquid, and three outlet pipes are connected to respectively an absorption pump import of phosphoric acid, the absorption pump import of phosphoric acid secondary and filter pump import.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320509487.7U CN203389506U (en) | 2013-08-21 | 2013-08-21 | Device for recycling and purifying phosphoric acid in tail gas produced by chemical production of activated carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320509487.7U CN203389506U (en) | 2013-08-21 | 2013-08-21 | Device for recycling and purifying phosphoric acid in tail gas produced by chemical production of activated carbon |
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| Publication Number | Publication Date |
|---|---|
| CN203389506U true CN203389506U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320509487.7U Expired - Fee Related CN203389506U (en) | 2013-08-21 | 2013-08-21 | Device for recycling and purifying phosphoric acid in tail gas produced by chemical production of activated carbon |
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| CN (1) | CN203389506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103446851A (en) * | 2013-08-21 | 2013-12-18 | 泉州市天龙环境工程有限公司 | Recovery and purification device and method for phosphoric acid from tail gases generated in chemical method activated carbon production process |
-
2013
- 2013-08-21 CN CN201320509487.7U patent/CN203389506U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103446851A (en) * | 2013-08-21 | 2013-12-18 | 泉州市天龙环境工程有限公司 | Recovery and purification device and method for phosphoric acid from tail gases generated in chemical method activated carbon production process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180124 Address after: Five road 361006 Fujian city of Xiamen province Xiamen Free Trade Zone No. 3 South 222 kilometer Gaoqi Aviation Business Plaza, No. 2 building eighth room 803 Patentee after: Zhongke Tianlong (Xiamen) environmental protection Co.,Ltd. Address before: 362332 Fujian city of Quanzhou province Nanan Kang Mei Zhen Futiecun Patentee before: QUANZHOU TIANLONG ENVIRONMENTAL ENGINEERING Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20210821 |
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| CF01 | Termination of patent right due to non-payment of annual fee |