CN103736288B - A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method and equipment - Google Patents

A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method and equipment Download PDF

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Publication number
CN103736288B
CN103736288B CN201410037290.7A CN201410037290A CN103736288B CN 103736288 B CN103736288 B CN 103736288B CN 201410037290 A CN201410037290 A CN 201410037290A CN 103736288 B CN103736288 B CN 103736288B
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water
heat exchange
steam
storage tank
exchange columns
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CN103736288A (en
Inventor
王杰
向良勇
万庆成
黄奎
徐亮
胡开荣
路明清
杜兵
陈仕强
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Hubei Xingfa Chemicals Group Co Ltd
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Hubei Xingfa Chemicals Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a kind of yellow phosphorus electric furnace quench pulp water vapour administer method and apparatus, condensation water at low temperature is utilized to carry out heat exchange with steam inside heat exchange columns, the moisture condensation that slag of quenching is produced becomes aqueous water recycle and reuse, by refrigeration plant, the recirculated water after heat exchange is become water at low temperature repeatedly to arrive heat exchange columns and carry out heat exchange, thus reaching to eliminate slag of quenching to produce the purpose of steam.Method provided by the invention and device are after processing steam, and the chimney outlet of discharge cannot see water smoke, eliminates atmospheric pollution, and the water got off through moisture condensation has been processed, remove harmful substance, more safety and environmental protection, make phosphorus production environmental protection reach higher standard.

Description

A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method and equipment
Technical field
The invention belongs to chemical field, be specially a kind of yellow phosphorus electric furnace and quench pulp water vapour administering method and equipment.
Background technology
Current yellow phosphorus electric furnace quench slag time the steam that produces not past any collection and improvement, be unordered be allowed to discharge in an atmosphere, cause serious atmospheric pollution, and containing harmful substances such as fluorides in steam, if not collecting improvement, by severe contamination air, do not reach the discharge standard of regulation.
Summary of the invention
It is an object of the invention to provide a kind of yellow phosphorus electric furnace to quench pulp water vapour administering method and equipment, recycle steam by heat exchange, it is possible to eliminate the steam of more than 95%, meet relevant emission standards, and eliminate the harmful substance in steam, safety and environmental protection.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: a kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method, specifically comprises the processes of:
1) steam that the condensation of steam is reclaimed slag of quenching produces is collected, then heat exchange columns and water at low temperature is adopted to carry out the liquefaction of heat exchange and steam, making moisture condensation is that aqueous water reclaims, uncooled steam reclaims through water smoke catcher, then the air adulterated 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 moisture condensation, is subsequently adding alkali liquor and processes, and regulates pH value and reaches more than 6.5;Finally the water of mixing being lowered the temperature, the water after cooling is for exchanging the coolant of follow-up steam in thermal tower.
Described heat exchange columns is contact heat exchange columns, adopts contact heat exchange columns to make the water at low temperature of condensation directly and good effect of heat exchange during the hydromining contact heat exchange columns of high temperature, and simple in construction, reasonable in design.
Centrifugal blower is adopted to be collected when described steam is collected.
Adding appropriate alkaline liquor in condensed water after described recovery to process, remove hexafluosilicic acid therein, the material such as fluohydric acid gas and phosphorus pentoxide, the mass concentration of the alkali liquor of addition is 30-40%, regulates pH value and reach more than 6.5 after adding alkali liquor mixing.
Adopt said method to administer yellow phosphorus electric furnace to quench the equipment of pulp water vapour, including the multiple stage heat exchange columns being sequentially connected with, centrifugal blower, water smoke catcher, this equipment also includes the storage tank supplying water for exchanging thermal tower to carry out and reclaiming, and is provided with air cooler and/or refrigeration system between storage tank and heat exchange columns.
Described refrigeration system includes closing the refrigeration unit of connection, water circulating pump and plate type heat exchanger successively.Preferred refrigeration unit is BrLi chiller.Adopt this refrigeration unit operation energy consumption low, it is possible to carry out Waste Heat Reuse.The waste heat tail gas of factory chimney discharge or the exhaust steam of boiler emission, can serve as the thermal source of refrigeration unit.The water at low temperature that can produce 10 degrees Celsius carrys out heat exchange.
Described heat exchange columns is four, storage tank is two, wherein every two heat exchange columns share a storage tank, it is provided with water pump and air cooler between storage tank and heat exchange columns above, water in storage tank is extracted out by water pump and respectively enters two heat exchange columns tops after air cooler cools down, and the water that water after heat exchange and moisture condensation get off is vented back to storage tank from bottom to complete once to circulate;It is provided with water pump and refrigeration system between storage tank and heat exchange columns below, water in storage tank is extracted out by water pump and respectively enters two heat exchange columns tops after the plate type heat exchanger heat exchange of refrigeration system cools down, and the water that water after heat exchange and moisture condensation get off is vented back to storage tank from bottom to complete once to circulate.
The present invention is by arranging multiple heat exchange columns, and heat exchange columns is divided into two parts, water after first order heat exchange columns heat exchange is recycled after being lowered 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 being lowered the temperature by refrigeration unit, after all heat exchange columns heat exchange condense, the steam of more than 90% becomes aqueous water and is recycled, residual gas passes through smoke stack emission after water smoke catcher traps water smoke further, smoke stack emission gas is the air of doping in steam, invisible water smoke, can avoid visual pollution.This method and device design two-stage heat exchange, first order heat exchange by initial temperature be 25 DEG C~30 DEG C, the cooling water of big flow the moisture condensation of 70%~80% is got off, second level heat exchange by initial temperature be 10 DEG C~15 DEG C, the cooling water of low discharge condenses remaining steam further.
The kinetic energy asynchronous machine of described centrifugal blower or the back pressure turbine of use low-pressure steam provide, and the thermal source of refrigeration unit can be supplied by the superheated steam not with pressure that back pressure turbine exports simultaneously.
The outlet of described water smoke catcher is connected in storage tank.
The invention have the benefit that
1) harmful substances such as the fluoride in steam it are possible to prevent to be drained in air, contaminated environment.Can quench the steam that slag produces by efficient recovery yellow phosphorus electric furnace simultaneously, reach the purpose that production scene cleaning produces, yellow phosphorus electric furnace is quenched before the enforcement of pulp water vapour administration project, the steam of 1000 cubic metres can be produced during furnace slag granulating per ton, in this water vapour, content of fluoride is at 100-200mg/ cubic meter, after the method is implemented, the steam of more than 90% is condensed recyclings, while water vapour in content of fluoride drop to less than 5mg/ cubic meter;
2) method of the present invention is simple, and technological design is reasonable, by the water of moisture condensation post liquefaction by being used for follow-up Steam treatment, saving water resource after processing, decreases discharge capacity;Apparatus structure provided by the invention is reasonable in design, improves heat exchange efficiency by contact heat exchange columns, improves steam recovery utilization rate by multi-stage heat exchanger tower, and in the end arranges water smoke catcher, it is possible to improves recovery utilization rate further.When the condensed water reclaimed reaches to a certain degree.Can using it for other operations, as being used for adding to yellow phosphorus electric furnace flushing cinder circulating water pool, the washing slag water as yellow phosphorus electric furnace recycles.
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.
Detailed description of the invention
Further illustrate the present invention below in conjunction with embodiment, but embodiment is only that the explanation present invention, rather than be limited.
Embodiment 1:
A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method, specifically comprises the processes of:
1) steam that the condensation of steam is reclaimed slag of quenching produces is collected by centrifugal blower, then multi-stage heat exchanger tower and water at low temperature is adopted to carry out heat exchange, making moisture condensation is that aqueous water reclaims, wherein the condensation coolant-temperature gage of heat exchange columns is that 26.2 DEG C of uncooled steam reclaim through water smoke catcher, then the air adulterated in steam is discharged, complete the recovery of steam;
2) condensation water reuse mixed with the water at low temperature after heat exchange by the water of moisture condensation, mixed temperature is 50 DEG C~58 DEG C, and to mixing water lower the temperature after make it below 30 DEG C, the water after cooling be used for exchange the condensation of follow-up steam in thermal tower.
Heat exchange columns described in the present embodiment is contact heat exchange columns, and in the condensed water after recovery, alkali liquor processes, and eliminates hexafluosilicic acid therein, the acidic materials such as fluohydric acid gas and phosphorus pentoxide.Yellow phosphorus electric furnace is quenched before the enforcement of pulp water vapour administration project, the steam of 1000 cubic metres can be produced during furnace slag granulating per ton, in this water vapour, content of fluoride is at 100-200mg/ cubic meter, after the project implementation, the steam of more than 90% is condensed recycling, and the content of fluoride in water vapour drops to less than 5mg/ cubic meter simultaneously;
Embodiment 2:
A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method, specifically comprises the processes of:
1) steam that the condensation of steam is reclaimed slag of quenching produces is passed in heat exchange columns, water with 27.3 DEG C carries out heat exchange, and making moisture condensation is that aqueous water reclaims, and uncooled steam reclaims through water smoke catcher, then the air adulterated in steam is discharged, complete the recovery of steam;
2) condensation water reuse mixed with the water at low temperature after heat exchange by the water of moisture condensation, mixed temperature is 50 DEG C~58 DEG C, and to mixing water lower the temperature after make it below 30 DEG C, the water after cooling be used for exchange the condensation of follow-up steam in thermal tower.
Heat exchange columns described in the present embodiment is contact heat exchange columns, and in the condensed water after recovery, alkali liquor processes, and eliminates hexafluosilicic acid therein, the acidic materials such as fluohydric acid gas and phosphorus pentoxide.Yellow phosphorus electric furnace is quenched before the enforcement of pulp water vapour administration project, the steam of 1000 cubic metres can be produced during furnace slag granulating per ton, in this water vapour, content of fluoride is at 100-200mg/ cubic meter, after the project implementation, the steam of more than 90% is condensed recycling, and the content of fluoride in water vapour drops to less than 5mg/ cubic meter simultaneously;
Embodiment 3:
As shown in Figure 1, a kind of yellow phosphorus electric furnace is quenched pulp water vapour abatement equipment, including 4 heat exchange columns 1, centrifugal blower 2 and the water smoke catcher 3 that are sequentially connected with, and for exchanging two storage tanks 6 that thermal tower 1 carries out supplying water and reclaiming, wherein every two heat exchange columns share a storage tank, it is provided with water pump and air cooler 4 between storage tank and two heat exchange columns above, water in storage tank is extracted out by water pump and respectively enters two heat exchange columns tops after air cooler cools down, and the water that water after heat exchange and moisture condensation get off is vented back to storage tank from bottom to complete once to circulate;Water pump and refrigeration system 5 it is provided with between storage tank and heat exchange columns below, this refrigeration system includes closing the refrigeration unit 51 of connection, water circulating pump 52 and plate type heat exchanger 53 successively, water in storage tank is extracted out by water pump and respectively enters two heat exchange columns tops after plate type heat exchanger 53 heat exchange of refrigeration system 5 cools down, and the water that water after heat exchange and moisture condensation get off is vented back to storage tank from bottom to complete once to circulate.
It addition, above example is only the technical scheme, particularly embodiment 3 illustrated in the present invention, heat exchange columns therein, the number of storage tank and dependency structure are only this equipment of detailed description, and the structure in embodiment 3 is not used in the restriction present invention.

Claims (2)

1. a yellow phosphorus electric furnace is quenched pulp water vapour administering method, it is characterised in that specifically comprises the processes of:
1) condensation of steam is reclaimed: adopt centrifugal blower to be collected the steam that slag of quenching produces, then contact heat exchange columns and water at low temperature is adopted to carry out the liquefaction of heat exchange and steam, making moisture condensation is that aqueous water reclaims, the steam of non-total condensation reclaims again through water smoke catcher, then the air adulterated 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 moisture condensation, is subsequently adding the alkali liquor that mass concentration is 30-40% and processes, and regulates pH value and reaches more than 6.5;Finally the water of mixing being lowered the temperature, the water after cooling is for exchanging the coolant of follow-up steam in thermal tower.
2. a yellow phosphorus electric furnace is quenched pulp water vapour abatement equipment, it is characterized in that: the multiple stage heat exchange columns (1) that includes being sequentially connected with, centrifugal blower (2), water smoke catcher (3), this equipment also includes storage tank (6), is provided with air cooler (4) and refrigeration system (5) between storage tank and heat exchange columns;Described refrigeration system includes closing the refrigeration unit (51) of connection, water circulating pump (52) and plate type heat exchanger (53) successively;The outlet of described water smoke catcher (3) is connected in storage tank (6);Described heat exchange columns is four, and 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 and heat exchange columns above;It is provided with water pump and refrigeration system between storage tank and heat exchange columns below;Described refrigeration unit (51) is BrLi chiller;The kinetic energy asynchronous machine of described centrifugal blower or the back pressure turbine of use low-pressure steam provide.
CN201410037290.7A 2014-01-26 2014-01-26 A kind of yellow phosphorus electric furnace is quenched pulp water vapour administering method and equipment Active CN103736288B (en)

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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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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
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
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
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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US8882895B2 (en) * 2012-06-04 2014-11-11 Z124 Method of controlling airflow through a water recovery device

Patent Citations (7)

* Cited by examiner, † Cited by third party
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
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
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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