CN2846429Y

CN2846429Y - Pure dry type purifier for oxygen convertor smoke

Info

Publication number: CN2846429Y
Application number: CN 200520104739
Authority: CN
Inventors: 王义新; 张欣荣; 王海英
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-25
Filing date: 2005-11-25
Publication date: 2006-12-13
Anticipated expiration: 2015-11-25

Abstract

The utility model relates to a pure dry type purifier for oxygen convertor smoke for steel enterprises, which is composed of a dust remover of a superheater of a primary gravity boiler, a dust remover of a secondary gravity heat exchanger, a dust remover of a tertiary gravity heat exchanger, a deaerator, a draught fan, a sack dust remover, a steam-water separator, a coal gas recovery cabinet, a desalinated water station, etc. Through the negative pressure function of the draught fan, high-temperature smoke gas from a vaporization cooling flue of an oxygen convertor passes through the dust remover of the superheater of the primary gravity boiler, the dust remover of the secondary gravity heat exchanger, the dust remover of the tertiary gravity heat exchanger, the deaerator and the sack dust remover to the deaerator in turn. A water pump and a high pressure pump are used for successively supplying desalinated water of the desalinated water station to the deaerator, the dust remover of the tertiary gravity heat exchanger, the steam-water separator, the dust remover of the secondary gravity heat exchanger and the dust remover of the superheater of the primary gravity boiler. The desalinated water or steam and the high-temperature smoke gas rapidly carry out heat exchange. Consequently, the cooling effect of transferring heat without mass transfer can be achieved. The purposes of qualified discharge and useful recovery can be realized.

Description

Oxygen coverter flue gas pure dry type refining plant

Technical field:

The utility model relates to the industrial ventilation dust removal installation, specifically a kind of iron and steel enterprise's oxygen coverter flue gas pure dry type refining plant that is used for.

Background technology:

At present, no matter the gas cleaning of iron and steel enterprise's oxygen coverter is combustion method or unburn method, and what the overwhelming majority adopted is the wet dedusting that two Wen Yita or spraying box are joined dewatering units at different levels.Though it can guarantee that the discharged flue gas dustiness conforms to discharging standards, but still has following deficiency:

1. wet dedusting at first is the waste great lot of water resources, the converter evaporated flue is carried 700～900 ℃ the high-temperature flue gas of coming, in dust removal installations such as two Wen Yita, lower the temperature by the water spray heat and mass, make high-temperature flue gas drop to 60 ℃ of left and right sides flue gas saturated and that have a certain amount of water smoke and be discharged to atmosphere (or being recovered to gas chamber), not only taken away a large amount of water, and made a large amount of thermal waste in the flue gas.

2. for satisfying the wet dedusting water, the turbid circulating water pump must be installed, build detention tank, sewage concentration basin, filtering slurry device, chemicals dosing plant etc., increased the investment of large amount of sewage treatment facility, meanwhile also expended the electric energy of a large amount of confession continuous water supplies and mud, sewage disposal.

3. two literary compositions, one tower wet dust removal device its essence is the dedusting of wet method resistance damage formula, and the dedusting fan that this device disposes not only will have corresponding air quantity, main is that enough blast will be arranged, could realize good dust removing effects, so the shaft power of blower fan is bigger, the current consumption height.

Summary of the invention:

Goal of the invention of the present utility model is intended to solve problems such as waste great lot of water resources, current consumption height, flue gas heat energy that above-mentioned wet dedusting equipment exists can not effectively utilize, and a kind of good dedusting effect is provided, economizes on water, makes full use of chemical heat energy and physics heat energy, reclaims the oxygen coverter flue gas pure dry type refining plant of iron dust containing.

The technical scheme that realizes the foregoing invention purpose is: this oxygen coverter flue gas pure dry type refining plant comprises one-level gravity boiler superheater fly-ash separator, secondary gravity interchanger fly-ash separator, three grades of gravity interchanger fly-ash separators, deoxygenator, induced draft fan, sack cleaner, the gas approach of this one-level gravity boiler superheater fly-ash separator and oxygen coverter gasification cooling flue UNICOM, the gas approach UNICOM of its exhanst gas outlet and secondary gravity interchanger fly-ash separator, the exhanst gas outlet of this secondary gravity interchanger fly-ash separator and the gas approach UNICOM of three grades of gravity interchanger fly-ash separators, the exhanst gas outlet of these three grades of gravity interchanger fly-ash separators and the gas approach UNICOM of deoxygenator, the gas approach UNICOM of the exhanst gas outlet of this deoxygenator and induced draft fan, the gas approach UNICOM of the exhanst gas outlet of this induced draft fan and sack cleaner, the exhanst gas outlet of this sack cleaner inserts the coal-gas recovering cabinet; The de-mineralized water import of said deoxygenator is by water pump and desalted water station UNICOM, its de-mineralized water outlet is by the de-mineralized water import UNICOM of high-pressure pump and three grades of gravity interchanger fly-ash separators, the de-mineralized water outlet of these three grades of gravity interchanger fly-ash separators and the de-mineralized water import UNICOM of steam separator, the de-mineralized water outlet of this steam separator and the de-mineralized water import UNICOM of secondary gravity interchanger fly-ash separator, the vapour outlet of this secondary gravity interchanger fly-ash separator and the steam inlet UNICOM of this steam separator, the steam inlet UNICOM of the vapour outlet of this steam separator and one-level gravity boiler superheater fly-ash separator, the superheated vapour of this one-level gravity boiler superheater fly-ash separator is connected to uses hot channel, and its water of condensation is back to desalted water station by pipeline.

According to described this oxygen coverter flue gas pure dry type refining plant of this case, its principle of work is: by the suction function of induced draft fan, will be from the next high-temperature flue gas of oxygen coverter gasification cooling flue, successively by one-level gravity boiler superheater fly-ash separator, secondary gravity interchanger fly-ash separator, three grades of gravity interchanger fly-ash separators, deoxygenator, sack cleaner is to deoxygenator, by water pump and high-pressure pump the de-mineralized water of desalted water station is supplied with deoxygenator successively, three grades of gravity interchanger fly-ash separators, steam separator, secondary gravity interchanger fly-ash separator, one-level gravity boiler superheater fly-ash separator, make de-mineralized water or steam and high-temperature flue gas carry out heat exchange rapidly, thereby reach the not cooling-down effect of mass transfer that conducts heat, the oxygen coverter flue-gas temperature is finally reduced to below 100 ℃, simultaneously through the final flue gas of discharging of sack cleaner by initial dustiness 100mg/m ³About reduce to 5mg/m ³About, realized the purpose of qualified discharging and useful recovery.

This device compared with prior art has following advantage:

1. reduced with saturated flue gas and arranged, the big water gaging of ton steel saving to atmospheric steam;

2. need not mud, sewage treatment facility, reduced corresponding apparatus investment, occupation of land and running maintenance expense;

3. system's running resistance reduces, and has reduced blower fan 1/3 current consumption;

4. high-temperature flue gas is lowered the temperature by a series of refrigerant dedustings, has reclaimed chemical heat energy and physics heat energy a large amount of in the converter gas, presses in recyclable time of the ton steel, about middle temperature steam 50kg, and steel per ton can be sent out about 10kw in order to generate electricity;

5. steel per ton reclaims the iron oxide dust 10～20kg of the iron-holder of doing 60%, can be admixed in the sintered material uniformly.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Provide specific embodiment of the utility model below in conjunction with accompanying drawing.

The oxygen coverter flue gas pure dry type refining plant that present embodiment provides is by oxygen coverter gasification cooling flue 1, secondary gravity interchanger fly-ash separator 2, steam separator 3, three grades of gravity interchanger fly-ash separators 4, deoxygenator 5, induced draft fan 6, sack cleaner 7, fume emission pipeline 8, coal-gas recovering cabinet 9, desalted water station 10, water pump 11, high-pressure pump 12, with hot channel 13, one-level gravity boiler superheater fly-ash separator 14 is formed, the gas approach of this one-level gravity boiler superheater fly-ash separator 14 and oxygen coverter gasification cooling flue 1 UNICOM, the gas approach UNICOM of its exhanst gas outlet and secondary gravity interchanger fly-ash separator 2, the exhanst gas outlet of this secondary gravity interchanger fly-ash separator 2 and the gas approach UNICOM of three grades of gravity interchanger fly-ash separators 4, the exhanst gas outlet of these three grades of gravity interchanger fly-ash separators 4 and the gas approach UNICOM of deoxygenator 5, the gas approach UNICOM of the exhanst gas outlet of this deoxygenator 5 and induced draft fan 6, the gas approach UNICOM of the exhanst gas outlet of this induced draft fan 6 and sack cleaner 7, the exhanst gas outlet of this sack cleaner 7 can set up two-way separately, one the road inserts coal-gas recovering cabinet 9 carries out coal-gas recovering, fume emission pipeline 8 can be inserted in another road, is directly met the flue gas of discharging standards to airborne release by chimney; The de-mineralized water import of said deoxygenator 5 is by water pump 11 and desalted water station 10 UNICOMs, its de-mineralized water outlet is by the de-mineralized water import UNICOM of high-pressure pump 12 and three grades of gravity interchanger fly-ash separators 4, the de-mineralized water outlet of these three grades of gravity interchanger fly-ash separators 4 and the de-mineralized water import UNICOM of steam separator 3, the de-mineralized water outlet of this steam separator 3 and the de-mineralized water import UNICOM of secondary gravity interchanger fly-ash separator 2, the vapour outlet of this secondary gravity interchanger fly-ash separator 2 and the steam inlet UNICOM of this steam separator 3, the steam inlet UNICOM of the vapour outlet of this steam separator 3 and one-level gravity boiler superheater fly-ash separator 14, the superheated vapour of this one-level gravity boiler superheater fly-ash separator 14 is connected to hot channel 13 and goes heat supply or generating, and its water of condensation is back to desalted water station 10 by pipeline and does recirculated water usefulness.

Below illustrate the heat exchange principle of this device:

814 ℃ of high-temperature flue gas that come from oxygen coverter gasification cooling flue 1, by one-level gravity boiler superheater fly-ash separator 14,256.8 ℃ of saturated vapo(u)rs are heated to 450 ℃ superheated vapo(u)r after, be cooled to about 608 ℃; When secondary gravity interchanger fly-ash separator 2, the flue gas about 608 ℃ is cooled to about 444 ℃ after again 256.8 ℃ of saturation waters being heated to 256.8 ℃ of saturated vapo(u)rs; When three grades of gravity interchanger fly-ash separators 4, the flue gas about 444 ℃ is cooled to about 298 ℃ after again 104 ℃ of desalination deaerated water being heated to 256.8 ℃ of saturation waters; Through the low temperature de-mineralized water to 104 of 80 ℃ of deoxygenator 5 heating ℃, last again, converter fume cooling to 110 ℃ is sent into sack cleaner 7 (this sack cleaner 7 also can be substituted by electric precipitator) by induced draft fan 6, reaches the GB discharging or reclaim after smart dedusting.The de-mineralized water that this is wherein confessed through water pump 11 by desalted water station 10, after deoxygenator 5 deoxygenations, water is pumped into three grades of gravity interchanger fly-ash separators by high-pressure pump 12, water becomes 256.8 ℃ saturation water and delivers to steam separator 3 after hot flue gas heating, supply with the saturated vapo(u)r that secondary gravity interchanger fly-ash separator 2 continues to add 256.8 ℃ of thermogenesis by steam separator 3 again, supply one-level gravity boiler superheater fly-ash separator 14 to do the working medium of cooled flue gas through steam separator 3 isolating vapour, be heated to form qualified (450 ℃) superheated vapo(u)r and go generating or heat supply; Returning secondary gravity interchanger fly-ash separator 2 again through steam separator 3 isolating saturation waters continues to use.

Claims

1, a kind of oxygen coverter flue gas pure dry type refining plant comprises one-level gravity boiler superheater fly-ash separator, secondary gravity interchanger fly-ash separator, three grades of gravity interchanger fly-ash separators, deoxygenator, induced draft fan, sack cleaner, it is characterized in that:

A, the gas approach of this one-level gravity boiler superheater fly-ash separator and oxygen coverter gasification cooling flue UNICOM, the gas approach UNICOM of its exhanst gas outlet and secondary gravity interchanger fly-ash separator, the exhanst gas outlet of this secondary gravity interchanger fly-ash separator and the gas approach UNICOM of three grades of gravity interchanger fly-ash separators, the exhanst gas outlet of these three grades of gravity interchanger fly-ash separators and the gas approach UNICOM of deoxygenator, the gas approach UNICOM of the exhanst gas outlet of this deoxygenator and induced draft fan, the gas approach UNICOM of the exhanst gas outlet of this induced draft fan and sack cleaner, the exhanst gas outlet of this sack cleaner inserts the coal-gas recovering cabinet;

B, the de-mineralized water import of said deoxygenator is by water pump and desalted water station UNICOM, its de-mineralized water outlet is by the de-mineralized water import UNICOM of high-pressure pump and three grades of gravity interchanger fly-ash separators, the de-mineralized water outlet of these three grades of gravity interchanger fly-ash separators and the de-mineralized water import UNICOM of steam separator, the de-mineralized water outlet of this steam separator and the de-mineralized water import UNICOM of secondary gravity interchanger fly-ash separator, the vapour outlet of this secondary gravity interchanger fly-ash separator and the steam inlet UNICOM of this steam separator, the steam inlet UNICOM of the vapour outlet of this steam separator and one-level gravity boiler superheater fly-ash separator, the superheated vapour of this one-level gravity boiler superheater fly-ash separator is connected to uses hot channel, and its water of condensation is back to desalted water station by pipeline.