CN203507778U - Efficient reverse spray washer capable of being used for gathering phosphoric acid mist or absorbing fluorine from flue gas - Google Patents
Efficient reverse spray washer capable of being used for gathering phosphoric acid mist or absorbing fluorine from flue gas Download PDFInfo
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- CN203507778U CN203507778U CN201320581055.7U CN201320581055U CN203507778U CN 203507778 U CN203507778 U CN 203507778U CN 201320581055 U CN201320581055 U CN 201320581055U CN 203507778 U CN203507778 U CN 203507778U
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Abstract
The utility model discloses an efficient reverse spray washer capable of being used for gathering phosphoric acid mist or absorbing fluorine from flue gas. The efficient reverse spray washer comprises a washing pipe, a connecting pipe and a separation tank, wherein the bottom end of the washing pipe is communicated with the middle part of the separation tank through the connecting pipe; a spray nozzle is arranged in at least one of the washing pipe and the connecting pipe, and the opening direction of the spray nozzle in the pipe points towards a flue gas inlet of the washing pipe; a liquid inlet of the spray nozzle penetrates through the side wall of the washing pipe and/or the connecting pipe and is connected to an acid liquor circulating pipeline. The efficient reverse spray washer disclosed by the utility model has the advantages of simple structure, low investment cost, high performance-price ratio, strong operability, firmness, durability and the like, and is particularly suitable for gathering phosphoric acid mist or absorbing fluorine from flue gas during preparation of phosphoric acid through a kiln method.
Description
Technical field
The utility model relates to a kind of equipment that flue gas is carried out to phosphorus and fluorine recycling, relates in particular to a kind of for trap the efficient reverse spray rinsing device of phosphoric acid mist and fluorine from kiln-process phosphoric acid flue gas.
Background technology
Kiln-process phosphoric acid is a kind of new technology (equipment Kiln Phosphoric Acid with rotary kiln preparing phosphoric acid that U.S. ORC company proposed at first in nineteen eighty-three, be called for short KPA technique), this technique can be used mid low grade phosphate rock stone, silica and the direct preparing phosphoric acid of carbonaceous reducing agent, and ORC company has completed and run into some technical difficulties that are difficult to overcome after part intermediate experiment work and stopped exploitation.
The work of ORC company has caused China scientific worker's great attention, Changsha Mining & Metallurgy Inst was since 1988, cooled agglomerated pellet for metallurgical industry and Dr Kiln technology are combined with the phosphate rock resource feature of China, propose a new phosphoric acid preparation were established---CDK kiln-process phosphoric acid new technology, and carried out development.
It is identical with the acid of thermal phosphoric acid receipts that the flue gas of kiln-process phosphoric acid is received sour principle, and its main chemical equation is:
P
2O
5+3H
2O=2H
3PO
4
Kiln-process phosphoric acid kiln tail is containing P
2o
5first enter a hydrated tower with the flue gas of fluorine, this equipment has cooled flue gas and aquation to absorb P
2o
5dual-use function, using SPA as circulated sprinkling liquid, it is evenly ejected in flue gas, flue gas fully contacts with the phosphoric acid solution of injection, the P in flue gas
2o
5water generation chemical reaction in gas and phosphoric acid solution generates phosphoric acid (gas), over half being absorbed into solution of phosphoric acid generating, remainder forms phosphoric acid mist and remains in gas phase, and we must trap the direct yield that could improve phosphorus as much as possible this part phosphoric acid mist.
The technology of existing trapping phosphoric acid mist has two kinds: the one, adopt one-level or two-stage Venturi tube; The 2nd, electricity consumption demist, these two kinds of methods respectively have deficiency, and it is very high that the former equipment resistance reaches 6kPa～9kPa energy consumption, and the larger economy of the latter's investment is poor.Therefore, develop the requirement that a kind of energy consumption is lower, equipment investment is moderate efficient phosphoric acid mist catching apparatus could meet kiln-process phosphoric acid.
The kiln-process phosphoric acid flue gas having trapped after phosphoric acid mist goes the fluorine in fluorine recovery process recovered flue gas (to be mainly SiF again
4), existing fluorine recovery process is mainly used for reference the technology of phosphoric acid by wet process and Phosphate Fertilizer Industry, generally adopts drying wheel absorption chamber, tubulent contact tower, spray void tower work etc. as scrubbing tower.Drying wheel absorption chamber is the most ancient equipment, and its mass-transfer efficiency is low, equipment resistance is large also eliminates gradually; Although tubulent contact tower gas-liquid contact is better, assimilation effect is better, also there is damaged problem in the large and small ball of equipment resistance; Although spray void tower resistance is little, reach that certain assimilation effect liquid-gas ratio is large, operating cost is high, therefore, develops the requirement that efficient fluorine absorption equipment could meet kiln-process phosphoric acid.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, provide a kind of simple in structure, cost of investment is low, cost performance is high, strong operability and the robust efficient reverse spray rinsing device that can be used for trapping phosphoric acid mist or absorb fluorine from flue gas.
For solving the problems of the technologies described above, the technical scheme the utility model proposes is a kind of efficient reverse spray rinsing device that can be used for trapping phosphoric acid mist from flue gas or absorb fluorine, comprise sluicing pipe, tube connector and knockout drum, the bottom of sluicing pipe is connected with the middle part of knockout drum by tube connector, in described sluicing pipe, tube connector, have at least a place to be equiped with (acid solution) spray spout, and the opening direction of spray spout in pipe points to the gas approach place of sluicing pipe, and the inlet of spray spout is connected to acid cycle pipeline through the sidewall of sluicing pipe and/or tube connector.
In above-mentioned efficient reverse spray rinsing device, preferably, in described sluicing pipe and tube connector, be all equiped with spray spout, in sluicing pipe, the inlet of spray spout is connected to acid cycle pipeline through the sidewall of sluicing pipe, and the spray spout in tube connector is connected to acid cycle pipeline through the sidewall of tube connector.
In above-mentioned efficient reverse spray rinsing device, according to the difference of smoke treatment amount, the aperture of described spray spout is preferably controlled as 25mm～200mm.This kind of spray spout belongs to large aperture nozzle, and its fogging degree requires low and is difficult for stopping up.
In above-mentioned efficient reverse spray rinsing device, described sluicing pipe and knockout drum are all preferably the pipe of glass steel, the pipe of stainless steel or polypropylene pipe; Its wall thickness can preferably be controlled at 8mm～20mm.
In above-mentioned efficient reverse spray rinsing device, preferred, between described sluicing pipe and tube connector, by an expansion joint, be connected.
In above-mentioned efficient reverse spray rinsing device, preferred, described acid cycle pipeline is provided with cyclic acid pump, and one end of described acid cycle pipeline connects the inlet of spray spout, and the other end connects the acid solution outlet of knockout drum.This acid cycle pipeline can effectively be realized sour recycling for spray, improves its utilization ratio.
In above-mentioned efficient reverse spray rinsing device, for guaranteeing its normal operating efficiency and the cleannes of giving vent to anger, preferred, described knockout drum top is also provided with foam-removing layer.Described knockout drum middle part is provided with an acid crossflow port.
Compared with prior art, the utility model has the advantage of: the utility model equipment resistance is lower, have equipment size little, invest little, cost performance advantages of higher, its flue gas enters from top, absorbent upwards sprays into from bottom, high speed flue gas and spray into solution and form strong turbulence region at gas-liquid interface zone, fluid momentum reaches balance, gas-liquid close contact and produce more stable froth zone, in froth zone, gas contacts with liquid surface great and that upgrade fast, thereby reaches very high washing (absorption) efficiency; , because apparatus body adopts all-glass fibre reinforced plastic material, make, sturdy and durable, operation, observation are intuitively meanwhile.
Accompanying drawing explanation
Fig. 1 is the structural representation of the efficient reverse spray rinsing device in the utility model embodiment.
Marginal data:
1, sluicing pipe; 2, expansion joint; 3, acid solution spray spout; 4, tube connector; 5, knockout drum; 6, foam-removing layer; 7, acid cycle pipeline; 8, air inlet; 9, gas outlet; 10, acid solution outlet; 11, acid crossflow port; 12, inlet; 13, circulating pump; 14, nozzle holder.
The specific embodiment
Below in conjunction with Figure of description and concrete preferred embodiment, the utility model is further described, but does not therefore limit protection domain of the present utility model.
Embodiment:
A kind of efficient reverse spray rinsing device of the present utility model as shown in Figure 1, comprise sluicing pipe 1(φ 1.2m), tube connector 4 and knockout drum 5(φ 3.6m), the bottom of sluicing pipe 1 is connected with the middle part of knockout drum 5 by tube connector 4, between sluicing pipe 1 and tube connector 4, by an expansion joint 2, is connected.The interior acid solution spray spout 3 that is all equiped with of the sluicing pipe 1 of the present embodiment and tube connector 4.Acid solution spray spout 3 in sluicing pipe 1 is inserted into the middle part of sluicing pipe 1 by nozzle holder 14, and stretches into from the sidewall outside of sluicing pipe 1; Acid solution spray spout 3 in tube connector 4 is inserted into the straight section place of tube connector by nozzle holder 14, and stretches into from the sidewall outside of tube connector 4; The opening direction of acid solution spray spout 3 in sluicing pipe 1 and tube connector 4 all points to the air inlet 8 of sluicing pipe 1.The inlet 12 of the interior acid solution spray spout 3 of sluicing pipe 1 is connected to acid cycle pipeline 7 through the sidewall of sluicing pipe 1, and the acid solution spray spout 3 in tube connector 4 is connected to acid cycle pipeline 7 through the sidewall of tube connector 4.Sluicing pipe 1 and knockout drum 5 are wall thickness at the glass fiber reinforced plastic round pipe of 8mm～20mm.The aperture of acid solution spray spout 3 is 25mm～200mm, and acid cycle pipeline 7 is provided with cyclic acid pump 13, and one end of acid cycle pipeline 7 connects the inlet 12 of acid solution spray spout 3, and the other end connects the acid solution outlet 10 of knockout drum 5.The top of knockout drum 5 is also provided with foam-removing layer 6, and knockout drum middle part is provided with acid crossflow port 11.
The operation principle of the efficient reverse spray rinsing device of the present embodiment is: first the phosphorous acid mist that kiln-process phosphoric acid technique produces and the flue gas of fluorine enter into sluicing pipe 1 from the air inlet 8 of sluicing pipe 1, the entrance flue gas temperature at sluicing pipe 1 place is 90 ℃～110 ℃, the acid solution spray spout 3 of opening before this starts to the interior Sprayer Circulation acid solution of sluicing pipe 1, the recycled phosphoric acid liquid temp of acid solution spray spout 3 ejection is that 60 ℃～75 ℃, recycled phosphoric acid liquid concentration are 35%～55%, the air velocity at sluicing pipe 1 place is 15m/s～30m/s, and spray liquid-gas ratio is controlled as 2L/m
3～6L/m
3flue gas after spray washing enters into knockout drum 5 by tube connector 4, further separated under the effect of foam-removing layer 6 in knockout drum 5, acid solution after separated recovery is deposited to the bottom of knockout drum 5, and enter in acid cycle pipeline 7 by its acid solution outlet 10, and continue circulation and be delivered in the acid solution spray spout 3 in tube connector 4, the residue flue gas after separated recovery enters next fluorine from the gas outlet 9 at knockout drum 5 tops and absorbs operation, and exit gas temperature is approximately 60 ℃～80 ℃.
The fluorine absorber that the efficient reverse spray rinsing device of the present embodiment also can be used as next step one-level fluorine absorption operation is used, operation principle is now: first the fluorine-containing flue gas producing after trapping phosphoric acid mist enters into sluicing pipe 1 from the air inlet 8 of sluicing pipe 1, the entrance flue gas temperature at sluicing pipe 1 place is 60 ℃～80 ℃, now acid solution spray spout 3 starts to the interior spray silicate fluoride solution of sluicing pipe 1, the silicate fluoride solution temperature of acid solution spray spout 3 ejections is 50 ℃～62 ℃, fluosilicic acid concentration is 8%～20%, the air velocity at sluicing pipe 1 place is 15m/s～30m/s, spray liquid-gas ratio is controlled as 2L/m
3～6L/m
3flue gas after spray washing enters into knockout drum 5 by tube connector 4, further separated under the effect of foam-removing layer 6 in knockout drum 5, acid solution after separated recovery is deposited to the bottom of knockout drum 5, and enter in acid cycle pipeline 7 by its acid solution outlet 10, and continue circulation and be delivered in the acid solution spray spout 3 in tube connector 4, the residue flue gas after separated recovery enters next step secondary fluorine from the gas outlet 9 at knockout drum 5 tops absorbs operation, and exit gas temperature is approximately 50 ℃～65 ℃.
The fluorine absorber that the efficient reverse spray rinsing device of the present embodiment equally also can be used as secondary fluorine absorption operation is used, and s main working parameters is all similar to above-mentioned one-level fluorine absorption operation with process conditions, only to import and export flue-gas temperature slightly to change, in addition, absorption liquid silicate fluoride solution temperature is that 47 ℃～57 ℃, fluosilicic acid concentration are 0.5%～5%.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (7)
1. an efficient reverse spray rinsing device that can be used for trapping phosphoric acid mist or absorb fluorine from flue gas, comprise sluicing pipe, tube connector and knockout drum, the bottom of sluicing pipe is connected with the middle part of knockout drum by tube connector, it is characterized in that, in described sluicing pipe, tube connector, have at least a place to be equiped with spray spout, and the opening direction of spray spout in pipe points to the gas approach place of sluicing pipe, and the inlet of spray spout is connected to acid cycle pipeline through the sidewall of sluicing pipe and/or tube connector.
2. efficient reverse spray rinsing device according to claim 1, it is characterized in that: in described sluicing pipe and tube connector, be all equiped with spray spout, in sluicing pipe, the inlet of spray spout is connected to acid cycle pipeline through the sidewall of sluicing pipe, and the spray spout in tube connector is connected to acid cycle pipeline through the sidewall of tube connector.
3. efficient reverse spray rinsing device according to claim 2, is characterized in that: the aperture of described spray spout is 25mm～200mm.
4. according to the efficient reverse spray rinsing device described in any one in claim 1～3, it is characterized in that: described sluicing pipe and knockout drum are glass reinforced plastic pipe, stainless pipe or polypropylene pipe.
5. according to the efficient reverse spray rinsing device described in any one in claim 1～3, it is characterized in that: between described sluicing pipe and tube connector, by an expansion joint, be connected.
6. according to the efficient reverse spray rinsing device described in any one in claim 1～3, it is characterized in that: described acid cycle pipeline is provided with cyclic acid pump, one end of described acid cycle pipeline connects the inlet of spray spout, and the other end connects the acid solution outlet of knockout drum.
7. according to the efficient reverse spray rinsing device described in any one in claim 1～3, it is characterized in that: described knockout drum top is also provided with foam-removing layer, described knockout drum middle part is provided with an acid crossflow port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320581055.7U CN203507778U (en) | 2013-09-18 | 2013-09-18 | Efficient reverse spray washer capable of being used for gathering phosphoric acid mist or absorbing fluorine from flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320581055.7U CN203507778U (en) | 2013-09-18 | 2013-09-18 | Efficient reverse spray washer capable of being used for gathering phosphoric acid mist or absorbing fluorine from flue gas |
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| CN203507778U true CN203507778U (en) | 2014-04-02 |
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| CN201320581055.7U Expired - Fee Related CN203507778U (en) | 2013-09-18 | 2013-09-18 | Efficient reverse spray washer capable of being used for gathering phosphoric acid mist or absorbing fluorine from flue gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445118A (en) * | 2014-12-01 | 2015-03-25 | 四川玖长科技有限公司 | Process for preparing phosphoric acid from drawing smoke of kiln method phosphoric acid process |
| WO2016086826A1 (en) * | 2014-12-01 | 2016-06-09 | 四川玖长科技有限公司 | Improved device for preparing phosphoric acid from kiln egression flue gas of phosphoric acid process of kiln method, and phosphoric acid preparing process |
| CN112642281A (en) * | 2020-12-28 | 2021-04-13 | 宜宾海翔化工有限责任公司 | Cooling washing dust removal system and method for hydrogen sulfide acid production |
-
2013
- 2013-09-18 CN CN201320581055.7U patent/CN203507778U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445118A (en) * | 2014-12-01 | 2015-03-25 | 四川玖长科技有限公司 | Process for preparing phosphoric acid from drawing smoke of kiln method phosphoric acid process |
| WO2016086826A1 (en) * | 2014-12-01 | 2016-06-09 | 四川玖长科技有限公司 | Improved device for preparing phosphoric acid from kiln egression flue gas of phosphoric acid process of kiln method, and phosphoric acid preparing process |
| CN112642281A (en) * | 2020-12-28 | 2021-04-13 | 宜宾海翔化工有限责任公司 | Cooling washing dust removal system and method for hydrogen sulfide acid production |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20200918 |