CN103736288A - Method and equipment for treating water vapor of quenching slag of yellow-phosphorus electric furnace - Google Patents
Method and equipment for treating water vapor of quenching slag of yellow-phosphorus electric furnace Download PDFInfo
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- CN103736288A CN103736288A CN201410037290.7A CN201410037290A CN103736288A CN 103736288 A CN103736288 A CN 103736288A CN 201410037290 A CN201410037290 A CN 201410037290A CN 103736288 A CN103736288 A CN 103736288A
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Abstract
The invention discloses a method and equipment for treating water vapor of quenching slag of a yellow-phosphorus electric furnace. The method comprises the following steps: low-temperature water for condensation is utilized to exchange heat with water vapor in a heat exchange tower to condense the water vapor generated by the quenching slag into liquid water for recycling, and water is circulated after heat exchange is changed into the low-temperature water through refrigeration equipment to return to the heat exchange tower for heat exchange, and therefore the purpose of eliminating the water vapor generated by the quenching slag. After the method and the equipment treat the water vapor, no water mist exists at the output of a discharge chimney, and the atmospheric pollution is eliminated. The water formed by condensing the water vapor is treated, harmful substances are eliminated, the method and the equipment are safer and more environment-friendly, and the yellow-phosphorus production achieves a higher environment-friendly standard.
Description
Technical field
The invention belongs to chemical field, be specially a kind of yellow phosphorus electric furnace pulp water vapour of quenching and administer method and apparatus.
Background technology
The steam producing when yellow phosphorus electric furnace is quenched slag at present does not pass through any collection and improvement, that unordered letting alone is emitted in atmosphere, caused serious atmosphere pollution, and in steam, contain the harmful substances such as fluoride, if do not collect improvement, by severe contamination air, do not reach the discharge standard of regulation.
Summary of the invention
The object of this invention is to provide a kind of yellow phosphorus electric furnace pulp water vapour of quenching and administer method and apparatus, by heat exchange, recycle steam, can eliminate more than 95% steam, meet relevant emission standards, and removed the harmful substance in steam, safety and environmental protection.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of yellow phosphorus electric furnace pulp water vapour improvement method of quenching, and concrete technology is:
1) condensation of steam is reclaimed the steam of the slag generation of quenching is collected, then adopt heat exchange columns and water at low temperature to carry out the liquefaction of heat exchange and steam, making steam be condensed into aqueous water reclaims, uncooled steam reclaims through water smoke trap, then the air adulterating in steam is discharged, complete the recovery of steam;
2) condensation water reuse is mixed with the water at low temperature after heat exchange by the water of steam condensation, then adds alkali lye to process, and regulates pH value to reach more than 6.5; Finally the water mixing is lowered the temperature, the water after cooling is for exchanging the refrigerant of the follow-up steam of thermal tower.
Described heat exchange columns is contact heat exchange columns, good effect of heat exchange when the water at low temperature hydromining direct and high temperature that adopts contact heat exchange columns that condensation is used is used contact heat exchange columns, and simple in structure, reasonable in design.
Described steam adopts centrifugal blower to collect while collecting.
In condensed water after described recovery, add appropriate alkaline liquor to process, remove fluosilicic acid wherein, the materials such as hydrogen fluoride and phosphorus pentoxide, the mass concentration of the alkali lye adding is 30-40%, adds alkali lye to mix the rear pH value that regulates and reaches more than 6.5.
Adopt said method to administer the quench equipment of pulp water vapour of yellow phosphorus electric furnace, comprise many heat exchange columns, centrifugal blower, the water smoke trap that connect successively, this equipment also comprises the storage tank that supplies water and reclaim for exchanging thermal tower, is provided with air cooler and/or refrigeration system between storage tank and heat exchange columns.
Described refrigeration system comprises refrigeration unit, water circulating pump and the plate type heat exchanger that sealing connects successively.Preferred refrigeration unit is lithium bromide refrigerating unit.Adopt this refrigeration unit operation energy consumption low, can carry out used heat utilization.The waste heat tail gas of factory chimney discharge or the exhaust steam of boiler emission, can be as the thermal source of refrigeration unit.Can produce the water at low temperature of 10 degrees Celsius and carry out heat exchange.
Described heat exchange columns is four, storage tank is two, wherein every two heat exchange columns share a storage tank, between storage tank above and heat exchange columns, be provided with water pump and air cooler, two heat exchange columns tops are extracted and entered respectively after air cooler is cooling to water in storage tank out by water pump, the water that the water after heat exchange and steam condensation are got off is discharged from bottom to get back to storage tank and completed once and circulate; Between storage tank below and heat exchange columns, be provided with water pump and refrigeration system, water in storage tank is extracted out by water pump and enter respectively two heat exchange columns tops after the plate type heat exchanger heat exchange of refrigeration system is cooling, and the water that the water after heat exchange and steam condensation are got off is discharged from bottom to get back to and storage tank, completed once circulation.
The present invention is by arranging a plurality of heat exchange columns, and heat exchange columns is divided into two parts, water after the heat exchange of first order heat exchange columns recycles after lowering the temperature by efficient air cooling apparatus repeatedly again, recirculated water after the contact heat exchanger heat exchange of the second level is recycled after lowering the temperature by refrigeration unit, after all heat exchange columns heat exchange condensations, more than 90% steam liquefy water is recovered utilization, residual gas after water smoke trap further traps water smoke by smoke stack emission, smoke stack emission gas is the air adulterating in steam, naked eyes be cannot see water smoke, can avoid visual pollution.This method and the heat exchange of device design two-stage, first order heat exchange is that 25 ℃～30 ℃, the cooling water of large flow get off 70%～80% steam condensation by initial temperature, and second level heat exchange is that 10 ℃～15 ℃, the cooling water of low discharge are the further condensation of remaining steam by initial temperature.
The kinetic energy of described centrifugal blower is with asynchronous machine or use the back pressure turbine of low-pressure steam to provide, and the superheated steam not with pressure that the thermal source of refrigeration unit can export by back pressure turbine is simultaneously supplied.
The delivery port of described water smoke trap is connected in storage tank.
The beneficial effect that the present invention has:
1) can prevent that the harmful substances such as fluoride in steam are drained in air, contaminated environment.Can effectively reclaim the yellow phosphorus electric furnace steam that slag produces of quenching simultaneously, reach the object of production scene cleaner production, yellow phosphorus electric furnace is quenched before the enforcement of pulp water vapour administration project, during furnace slag granulating per ton, can produce the steam of 1000 cubic metres, in this water vapour, content of fluoride is at 100-200mg/ cubic meter, after the method is implemented, recyclings that be condensed of more than 90% steam, the content of fluoride in while water vapour drops to and is less than 5 mg/ cubic meters;
2) method of the present invention is simple, and technological design is reasonable, and after the water after steam condensation liquefaction is passed through to process, for follow-up Steam treatment, saving water resource, has reduced discharge capacity; Apparatus structure provided by the invention is reasonable in design, by contact heat exchange columns, has improved heat exchange efficiency, by multi-stage heat exchanger tower, has improved steam recovery utilization rate, and water smoke trap is in the end set, and can further improve recovery utilization rate.When the condensed water reclaiming acquires a certain degree.Can use it for other operations, as for adding to yellow phosphorus electric furnace flushing cinder circulating water pool, as the flushing cinder water of yellow phosphorus electric furnace, recycle.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of the embodiment of the present invention 3.
The specific embodiment
Below in conjunction with embodiment, further illustrate the present invention, but embodiment is only to illustrate the present invention, rather than is limited.
Embodiment 1:
A kind of yellow phosphorus electric furnace pulp water vapour improvement method of quenching, concrete technology is:
1) condensation of steam is reclaimed the steam of the slag generation of quenching is collected by centrifugal blower, then adopt multi-stage heat exchanger tower and water at low temperature to carry out heat exchange, making steam be condensed into aqueous water reclaims, wherein the condensation coolant-temperature gage of heat exchange columns is that 26.2 ℃ of uncooled steam reclaim through water smoke trap, then the air adulterating in steam is discharged, complete the recovery of steam;
2) condensation water reuse is mixed with the water at low temperature after heat exchange by the water of steam condensation, and mixed temperature is 50 ℃～58 ℃, and makes it lower than 30 ℃ after the water mixing is lowered the temperature, the condensation of the water after cooling for exchanging the follow-up steam of thermal tower.
Heat exchange columns described in the present embodiment is contact heat exchange columns, and in the condensed water after recovery, alkali lye is processed, and has removed fluosilicic acid wherein, the acidic materials such as hydrogen fluoride and phosphorus pentoxide.Yellow phosphorus electric furnace is quenched before the enforcement of pulp water vapour administration project, during furnace slag granulating per ton, can produce the steam of 1000 cubic metres, in this water vapour, content of fluoride is at 100-200mg/ cubic meter, after the project implementation, the recycling that is condensed of more than 90% steam, the content of fluoride in water vapour drops to and is less than 5 mg/ cubic meters simultaneously;
Embodiment 2:
A kind of yellow phosphorus electric furnace pulp water vapour improvement method of quenching, concrete technology is:
1) condensation of steam is reclaimed the steam of the slag generation of quenching is passed in heat exchange columns, carry out heat exchange with the water of 27.3 ℃, make steam be condensed into aqueous water and reclaim, uncooled steam reclaims through water smoke trap, then the air adulterating in steam is discharged, complete the recovery of steam;
2) condensation water reuse is mixed with the water at low temperature after heat exchange by the water of steam condensation, and mixed temperature is 50 ℃～58 ℃, and makes it lower than 30 ℃ after the water mixing is lowered the temperature, the condensation of the water after cooling for exchanging the follow-up steam of thermal tower.
Heat exchange columns described in the present embodiment is contact heat exchange columns, and in the condensed water after recovery, alkali lye is processed, and has removed fluosilicic acid wherein, the acidic materials such as hydrogen fluoride and phosphorus pentoxide.Yellow phosphorus electric furnace is quenched before the enforcement of pulp water vapour administration project, during furnace slag granulating per ton, can produce the steam of 1000 cubic metres, in this water vapour, content of fluoride is at 100-200mg/ cubic meter, after the project implementation, the recycling that is condensed of more than 90% steam, the content of fluoride in water vapour drops to and is less than 5 mg/ cubic meters simultaneously;
Embodiment 3:
As shown in Figure 1, a kind of yellow phosphorus electric furnace pulp water vapour abatement equipment of quenching, comprise 4 heat exchange columns 1, centrifugal blower 2 and the water smoke trap 3 that connect successively, and two storage tanks 6 that supply water and reclaim for exchanging thermal tower 1, wherein every two heat exchange columns share a storage tank, between storage tank above and two heat exchange columns, be provided with water pump and air cooler 4, two heat exchange columns tops are extracted and entered respectively after air cooler is cooling to water in storage tank out by water pump, the water that the water after heat exchange and steam condensation are got off is discharged from bottom to get back to storage tank and completed once and circulate; Between storage tank below and heat exchange columns, be provided with water pump and refrigeration system 5, this refrigeration system comprises refrigeration unit 51, water circulating pump 52 and the plate type heat exchanger 53 that sealing connects successively, water in storage tank is extracted out by water pump and enter respectively two heat exchange columns tops after plate type heat exchanger 53 heat exchange of refrigeration system 5 is cooling, and the water that the water after heat exchange and steam condensation are got off is discharged from bottom to get back to and storage tank, completed once circulation.
In addition, above embodiment is only the technical scheme in explanation the present invention, and particularly embodiment 3, and heat exchange columns wherein, the number of storage tank and dependency structure are only for describing this equipment in detail, and the structure in embodiment 3 is not used in restriction the present invention.
Claims (10)
1. the yellow phosphorus electric furnace pulp water vapour improvement method of quenching, is characterized in that, concrete technology is:
1) condensation of steam is reclaimed: the steam that the slag of quenching is produced is collected, then adopt heat exchange columns and water at low temperature to carry out the liquefaction of heat exchange and steam, making steam be condensed into aqueous water reclaims, the steam of total condensation does not reclaim again through water smoke trap, then the air adulterating in steam is discharged, complete the recovery of steam;
2) condensation water reuse is mixed with the water at low temperature after heat exchange by the water of steam condensation, then adds alkali lye to process, and regulates pH value to reach more than 6.5; Finally the water mixing is lowered the temperature, the water after cooling is for exchanging the refrigerant of the follow-up steam of thermal tower.
2. the yellow phosphorus electric furnace according to claim 1 pulp water vapour improvement method of quenching, is characterized in that: described heat exchange columns is contact heat exchange columns.
3. the yellow phosphorus electric furnace according to claim 1 pulp water vapour improvement method of quenching, is characterized in that: described steam adopts centrifugal blower to collect while collecting.
4. according to the pulp water vapour improvement method of quenching of the yellow phosphorus electric furnace one of claim 1-3 Suo Shu, it is characterized in that: step 2) described in the mass concentration of alkali lye be 30-40%, remove the acidic materials that are mixed with in water.
5. the yellow phosphorus electric furnace pulp water vapour abatement equipment of quenching, it is characterized in that: comprise many heat exchange columns (1), centrifugal blower (2), the water smoke trap (3) that connect successively, this equipment also comprises storage tank (6), is provided with air cooler (4) and/or refrigeration system (5) between storage tank and heat exchange columns.
6. the yellow phosphorus electric furnace according to claim 5 pulp water vapour abatement equipment of quenching, is characterized in that: described refrigeration system comprises refrigeration unit (51), water circulating pump (52) and the plate type heat exchanger (53) that sealing connects successively.
7. the yellow phosphorus electric furnace according to claim 6 pulp water vapour abatement equipment of quenching, it is characterized in that: described heat exchange columns is four, storage tank is two, and wherein every two heat exchange columns share a storage tank, are provided with water pump and air cooler between storage tank above and heat exchange columns; Between storage tank below and heat exchange columns, be provided with water pump and refrigeration system.
8. the yellow phosphorus electric furnace according to claim 7 pulp water vapour abatement equipment of quenching, is characterized in that: described refrigeration unit (51) is lithium bromide refrigerating unit.
9. according to the pulp water vapour abatement equipment of quenching of the yellow phosphorus electric furnace one of claim 5-8 Suo Shu, it is characterized in that: the kinetic energy of described centrifugal blower is with asynchronous machine or use the back pressure turbine of low-pressure steam to provide.
10. according to the pulp water vapour abatement equipment of quenching of the yellow phosphorus electric furnace one of claim 5-8 Suo Shu, it is characterized in that: the delivery port of described water smoke trap (3) is connected in storage tank (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410037290.7A CN103736288B (en) | 2014-01-26 | 2014-01-26 | A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method and equipment |
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| CN201410037290.7A CN103736288B (en) | 2014-01-26 | 2014-01-26 | A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240065A (en) * | 2015-09-16 | 2016-01-13 | 黄钰雪 | Energy-saving method and equipment for water quenching of yellow phosphorus slags and controlling and utilizing of bled steam |
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| JPH11319762A (en) * | 1998-05-18 | 1999-11-24 | Nkk Corp | Recovery of phosphorus from phosphorus-containing incineration ash |
| CN101571283A (en) * | 2009-05-27 | 2009-11-04 | 王世英 | Steam condensate recovery processing and waste heat utilization system and method thereof |
| CN101881432A (en) * | 2010-08-13 | 2010-11-10 | 邹岳明 | Thermal energy utilization system of high-temperature slag suitable for generating high-pressure heat steam |
| CN102678195A (en) * | 2012-06-08 | 2012-09-19 | 云南澄江盘虎化工有限公司 | Yellow phosphorus tail gas multiple gas-source combustion power generation system |
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| US20130319032A1 (en) * | 2012-06-04 | 2013-12-05 | Z124 | System for water recovery including multiple power sources |
| CN203677983U (en) * | 2014-01-26 | 2014-07-02 | 湖北兴发化工集团股份有限公司 | Quenching slag water vapor treatment equipment of yellow phosphorus electric furnace |
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2014
- 2014-01-26 CN CN201410037290.7A patent/CN103736288B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319762A (en) * | 1998-05-18 | 1999-11-24 | Nkk Corp | Recovery of phosphorus from phosphorus-containing incineration ash |
| CN101571283A (en) * | 2009-05-27 | 2009-11-04 | 王世英 | Steam condensate recovery processing and waste heat utilization system and method thereof |
| CN101881432A (en) * | 2010-08-13 | 2010-11-10 | 邹岳明 | Thermal energy utilization system of high-temperature slag suitable for generating high-pressure heat steam |
| CN102995702A (en) * | 2011-09-17 | 2013-03-27 | 天华化工机械及自动化研究设计院有限公司 | Method for recovering water vapor evaporated by drying coal by utilizing vacuum condensing cooling method and equipment thereof |
| CN202501756U (en) * | 2012-03-01 | 2012-10-24 | 天壕节能科技股份有限公司 | Sensible heat utilization system for electric furnace process yellow phosphorus tail gas |
| US20130319032A1 (en) * | 2012-06-04 | 2013-12-05 | Z124 | System for water recovery including multiple power sources |
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| CN203677983U (en) * | 2014-01-26 | 2014-07-02 | 湖北兴发化工集团股份有限公司 | Quenching slag water vapor treatment equipment of yellow phosphorus electric furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240065A (en) * | 2015-09-16 | 2016-01-13 | 黄钰雪 | Energy-saving method and equipment for water quenching of yellow phosphorus slags and controlling and utilizing of bled steam |
| CN105240065B (en) * | 2015-09-16 | 2017-01-25 | 黄钰雪 | Energy-saving method and equipment for water quenching of yellow phosphorus slags and controlling and utilizing of bled steam |
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| CN103736288B (en) | 2016-06-29 |
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