CN212757900U - Colored smoke plume governing system of high temperature water flushing sediment steam - Google Patents
Colored smoke plume governing system of high temperature water flushing sediment steam Download PDFInfo
- Publication number
- CN212757900U CN212757900U CN202021597699.1U CN202021597699U CN212757900U CN 212757900 U CN212757900 U CN 212757900U CN 202021597699 U CN202021597699 U CN 202021597699U CN 212757900 U CN212757900 U CN 212757900U
- Authority
- CN
- China
- Prior art keywords
- slag
- water
- steam
- temperature
- tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 216
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 98
- 239000000779 smoke Substances 0.000 title claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 186
- 239000007921 spray Substances 0.000 claims abstract description 79
- 238000011084 recovery Methods 0.000 claims abstract description 42
- 239000002918 waste heat Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims description 41
- 238000005507 spraying Methods 0.000 claims description 34
- 230000002087 whitening Effects 0.000 claims description 27
- 238000005469 granulation Methods 0.000 claims description 17
- 230000003179 granulation Effects 0.000 claims description 17
- 238000003379 elimination reaction Methods 0.000 claims description 16
- 239000003513 alkali Substances 0.000 claims description 11
- 230000003750 conditioning Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 230000001376 precipitating Effects 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000001502 supplementation Effects 0.000 claims description 7
- 241000276489 Merlangius merlangus Species 0.000 claims description 4
- 230000005012 migration Effects 0.000 claims description 4
- 229920002456 HOTAIR Polymers 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
- 231100000719 pollutant Toxicity 0.000 abstract description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 4
- 230000002378 acidificating Effects 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 16
- 230000005494 condensation Effects 0.000 description 16
- 238000010791 quenching Methods 0.000 description 11
- 230000000171 quenching Effects 0.000 description 11
- 239000010410 layer Substances 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 9
- 238000005496 tempering Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 229920002313 fluoropolymer Polymers 0.000 description 4
- 238000003303 reheating Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000499 pig iron Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 230000003313 weakening Effects 0.000 description 1
Images
Abstract
The utility model provides a high temperature water washed slag steam colored smoke plume governing system, the system includes graining white tower, towards slag water entry, high temperature sediment entry, spray set, condenser, second defroster, re-heater, air exhauster, still includes towards slag bath, spray water unit and gets hot unit, towards the slag bath and pass through slag ditch A and be connected with graining white tower bottom tower wall of disappearing, towards slag bath top lateral wall and pass through steam backflow pipeline B and be connected with graining white tower wall of disappearing; the high-temperature slag runner of the heat taking unit is connected with a high-temperature slag inlet at the bottom of the granulating and white-eliminating tower, the heat taking pipe bundle is arranged at the bottom of the high-temperature slag runner, the inlet of the heat taking pipe bundle is connected with a hot medium water outlet of the reheater, and the outlet of the heat taking pipe bundle is sequentially connected with a hot medium water pump and the hot medium water inlet of the reheater. The method can deeply purify the blast furnace slag flushing steam, reduce the discharge amount of acidic pollutants such as hydrogen sulfide, sulfur dioxide and the like, realize the recovery and utilization of the waste heat of the slag flushing steam, and greatly reduce the water consumption of a slag flushing system.
Description
Technical Field
The utility model relates to the technical field of colored smoke plume purification in the metallurgical industry, in particular to a high-temperature water-washed slag steam colored smoke plume treatment system.
Background
In the metallurgical industry, about 80 percent of high-temperature slag generated by an iron-making blast furnace is cooled by adopting a water quenching mode. About 0.3-0.4 ton blast furnace slag is produced per ton pig iron, and about 9-10 ton slag flushing water is consumed per ton slag. The slag flushing water can evaporate a large amount of slag flushing steam at the moment of contacting the high-temperature slag and in the process of conveying the slag flushing water to the slag flushing water tank, and takes away about 40 percent of heat of the high-temperature slag at the temperature of 80-100 ℃. In 2019, the blast furnace pig iron yield in China is 8.09 million tons, about 20 million tons of slag flushing water not only has a large amount of low-temperature waste heat resources, but also generates a large amount of low-pressure exhaust steam and dissipates about 0.85 million tons of slag flushing water. The discharged slag flushing steam contains a large amount of hydrogen sulfide, sulfur dioxide, hydrogen chloride, fiber cotton wool, silicate ultrafine particles and the like, and has great influence on the production environment. The water fog plume often exists in the production field, which harms the health of workers and causes serious corrosion to equipment and facilities in the blast furnace area. Therefore, the comprehensive treatment of the blast furnace slag flushing steam, the elimination of white smoke in a blast furnace area, the recovery of a large amount of water resources, the improvement of the environment of the blast furnace area, the weakening of the corrosion of production equipment and the reduction of pollutant emission become the problems of increasing attention of enterprises and society.
Since 2016, the requirements of treating colored smoke plume of industrial smoke in more than 30 provinces and cities and areas in China are met, and meanwhile, the practical conditions of severe haze and water resource shortage in northern areas of China further promote the technical progress in the field. For example, patent publication No. CN103060494B proposes a steam recovery type blast furnace slag flushing water system, which adopts a spraying mode to recover the exhaust steam generated at the slag flushing port, but does not consider smoke plume treatment and does not recover the exhaust steam of the slag flushing water tank; patent publication No. CN208667759U proposes a system for dedusting, dehydrating and eliminating white slag of a blast furnace granulated water slag tower, wherein the key technology adopts GGH to carry out heat exchange treatment on slag flushing steam before and after condensation treatment, but GGH equipment has a great risk of corrosion, and visual pollution cannot be thoroughly eliminated in winter; patent publication No. CN208883918U proposes a slag flushing water elimination and waste heat utilization system, and the key technology of the system carries out condensation treatment on dead steam generated by a slag flushing water pool, the treatment range is incomplete, and visual pollution cannot be thoroughly eliminated; patent publication No. CN209322919U proposes an environment-friendly white-eliminating treatment and waste heat utilization system for blast furnace slag, the key technology of the system is to use a heat exchanger and a spraying device in series to carry out condensation treatment on the waste steam of a slag flushing port and a slag flushing water tank, but the spraying system needs to supplement a large amount of new water, and the visual pollution cannot be thoroughly eliminated without a heating system; patent publication No. CN209348354U proposes a blast furnace slag flushing flue gas whitening integrated device, and the key technology of the device only mixes and heats slag flushing steam and cannot achieve the pollutant purification effect; patent publication No. CN209910414U proposes a de-whitening device, the key technology of which is to adopt a water cooler and an air cooler series connection mode to treat high-temperature and high-humidity flue gas or steam, and the problem of low heat exchange efficiency of the air cooler exists; patent publication No. CN210206387U proposes a self-heating flue gas white elimination device, the key technology of which adopts a white elimination tower to sequentially arrange a reheater and an air cooler from top to bottom, the flue gas cooling and reheating white elimination do not need extra heat, but the reheater has a serious risk of corrosion, the air cooler consumes a large amount of gas, and the pipeline arrangement is too complex; the patent application number 201910944801.6 provides a blast furnace slag flushing steam elimination and waste heat recovery device, the key technology of which only carries out condensation treatment on dead steam generated at a slag flushing port, and the problems of incomplete treatment range, huge air condensation system, large air consumption and low heat source grade exist; the publication No. CN109457065A proposes a waste steam recovery system for slag flushing water of an iron-making blast furnace, and the key technology is that the waste steam condensation treatment of the slag flushing system is carried out by adopting the serial design of a spray device and a heat exchanger, the pollutant treatment effect is good, but circulating water used by the spray device and the heat exchanger is conveyed to a cooling tower to be directly cooled, and a large amount of low-temperature water resource energy waste is caused.
From the above analysis, although the prior art has provided methods for white smoke abatement and waste heat recovery of a blast furnace slag quenching system, various defects in different degrees and aspects still need to be improved, and it is necessary to develop a relatively complete, energy-saving, efficient, economical and reliable high-temperature water slag steam colored smoke plume abatement system to meet the abatement requirements of the blast furnace slag quenching system.
Disclosure of Invention
The utility model aims at solving the problem among the prior art, provide a colored plume governing system of high temperature water washed sediment steam, be applicable to the blast furnace towards the cinder notch, towards the comprehensive improvement that the sediment steam produced the region such as sediment pond, can make the blast furnace towards the sediment steam and obtain deep purification, reduce the discharge of acidic pollutants such as hydrogen sulfide, sulfur dioxide, realize towards sediment steam waste heat recovery and utilize to greatly reduce towards sediment system water consumption.
In order to achieve the purpose, the utility model provides a high-temperature water-washed slag steam colored smoke plume treatment system, which comprises a granulation and white elimination tower, a slag-washed water inlet, a high-temperature slag inlet, a spraying device, a condenser, a second demister, a reheater and an exhaust fan, wherein the slag-washed water inlet, the high-temperature slag inlet, the spraying device, the condenser, the second demister, the reheater and the exhaust fan are sequentially arranged on a tower body of the granulation and white elimination; the slag washing water tank is connected with the bottom tower wall of the granulation and desalination tower through a slag ditch A, and the top side wall of the slag washing water tank is connected with the tower wall of the granulation and desalination tower through a steam backflow pipeline B; the heat taking unit comprises a high-temperature slag runner, a heat taking pipe bundle and a heat medium water pump, the high-temperature slag runner is connected with a high-temperature slag inlet at the bottom of the granulating and digesting tower, the heat taking pipe bundle is arranged at the bottom of the high-temperature slag runner, the heat taking pipe bundle inlet is connected with a heat medium water outlet of the reheater through a heat medium water circulating pipeline G, and the heat taking pipe bundle outlet is sequentially connected with the heat medium water pump and the heat medium water inlet of the reheater through the heat medium water circulating pipeline G.
Preferably, the heat medium of the reheater is hot medium water, the heat source is preferably high-temperature slag sensible heat, and the heat taking tube bundles are arranged at the bottom of the high-temperature slag runner at intervals.
Preferably, the spraying layers of the spraying device are not less than three layers, the interlayer spacing is 3-5 m, and the nozzles on two adjacent spraying layers are arranged in a staggered manner; a liquid collecting device is arranged below the spraying device and is a liquid collecting tray; the outer diameter of the liquid collecting tray is smaller than the inner diameter of the tower body of the granulating and whiting tower, a gap for upward migration of slag flushing steam is formed between the outer side of the liquid collecting tray and the inner wall of the tower body of the granulating and whiting tower, a discharge pipe is arranged at the bottom of the liquid collecting tray, and an outlet of the discharge pipe is connected with the filter.
As preferred, the spray water unit includes filter, quenching and tempering precipitation water tank, spray pump, waste heat recovery device, the filter entry passes through pipeline and collection liquid device exit linkage, the filter export passes through pipeline and quenching and tempering precipitation water tank entry linkage, the quenching and tempering precipitation water tank top is passed through alkali agent pipeline E and is connected with charge device, quenching and tempering precipitation water tank bottom pass through condensate recovery pipeline C with the flushing slag pond is connected, the top in flushing slag pond sets up the removal sealed cowling, the spray water pump entry is connected with quenching and tempering precipitation water tank liquid level below through spray water pipeline D, the spray water pump export is connected with waste heat recovery device spray water entry through spray water pipeline D, waste heat recovery device spray water export is connected with spray device spray water entry through spray water pipeline D.
Preferably, a first demister is arranged between the high-temperature slag inlet and the spraying device, the first demister is positioned below the liquid collecting device, and the joint of the steam return pipeline B and the tower wall of the granulating and white-eliminating tower is positioned below the first demister; a second demister is also arranged between the condenser and the reheater; the first demister and the second demister are not less than two layers and are ridge-type demisters, and the interlayer spacing is not less than 1.5 m.
Preferably, the tower body of the granulating and whitening tower is further provided with a first hygrothermograph, a second hygrothermograph and a third hygrothermograph from bottom to top for monitoring the temperature of flushing slag steam in real time, monitoring the condensation of the flushing slag steam to a set temperature, and setting the temperature corresponding to the reduction of 50% of the moisture content of the flushing slag steam, wherein the first hygrothermograph is arranged between the first demister and the liquid collecting tray, the second hygrothermograph and the third hygrothermograph are arranged between the spray device and the condenser, and the third hygrothermograph is arranged between the condenser and the second demister.
Preferably, the cold media of the condenser and the waste heat recovery device are both low-temperature water, preferably blast furnace wall cooling water, the cold media inlets of the condenser and the waste heat recovery device are connected with a cold media delivery pump and a cold media water supplementing tank in sequence through cold media pipelines F, and the cold media outlets are connected with a water inlet of a blast furnace wall cooling system through the cold media pipelines F.
Preferably, the heat exchange tubes of the condenser and the reheater are made of fluoroplastics, the tube diameter of each heat exchange tube is 10-14 mm, the wall thickness of each heat exchange tube is 0.8-1 mm, and the heat exchange tubes are arranged in a U shape.
Preferably, the cold mediums of the condenser and the waste heat recovery device can be low-temperature air, the cold medium inlets of the condenser and the waste heat recovery device are connected with the air blower through cold medium pipelines F, and the cold medium outlets are connected with the air inlet of the hot blast stove component through the cold medium pipelines F.
Preferably, the liquid collecting device may also be a steam-raising and liquid-collecting tray, the steam-raising and liquid-collecting tray includes a central baffle disc and a lower tray, an outer ring of the lower tray is mounted on an inner wall of a tower body of the granulation and digestion tower, an exhaust funnel extending upward is provided at a center of the lower tray, a cross section of the exhaust funnel is in a shape of a truncated cone gradually decreasing from bottom to top, an exhaust passage for upward migration of the slag flushing steam is provided in the exhaust funnel, the central baffle disc is positioned right above the exhaust passage, an outer ring of the central baffle disc is provided with a flow guide edge extending downward, and an outer diameter of the central baffle disc is larger than an outer diameter of an outlet end of the exhaust passage.
Preferably, the spray water unit further comprises a dosing device, a spray water pump and a slag flushing water supplementing tank, the slag flushing water supplementing tank is connected with a water inlet of the spray device through the spray water pump and provides spray water for the spray device, and the dosing device is connected with the top of the slag flushing water supplementing tank through an alkali agent pipeline E.
The utility model has the advantages that:
1. the utility model is a complete treatment system and a complete treatment method aiming at the slag flushing steam generating areas such as a slag flushing port, a slag flushing water pool and the like of a blast furnace, and overcomes the defect of incomplete treatment range in the prior art;
2. the utility model realizes deep treatment of slag flushing steam, complete elimination of colored smoke plume and environmental protection by means of condensation and reheating;
3. the utility model carries out alkali agent conditioning treatment on the spray water through the dosing device, can effectively prevent the acid corrosion of equipment, effectively promotes the spray water to treat acid pollutants such as hydrogen sulfide, sulfur dioxide, hydrogen chloride and the like in the slag flushing steam, reduces the pollutant emission, effectively collects the condensed water at the same time, and reduces the water consumption of a slag flushing system;
4. the utility model can not only utilize the blast furnace wall cooling water as the cold medium of the waste heat recovery device and the condenser, effectively utilize the existing cold source in the blast furnace area, but also utilize the low-temperature air as the cold medium of the waste heat recovery device and the condenser, and effectively recover the low-grade waste heat of the slag flushing steam;
5. the utility model discloses utilize the current heat source in blast furnace area, high temperature sediment sensible heat has realized thoroughly eliminating visual pollution's problem under the lower running cost as the reheat heat source of the sludging steam after the condensation promptly.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
Drawings
FIG. 1 is a system diagram of the system for treating the colored smoke plume of the steam with high-temperature water-washed slag in example 1.
FIG. 2 is a system diagram of the system for treating the colored smoke plume of the steam with high-temperature water-washed slag in example 2.
FIG. 3 is a system diagram of the system for treating the colored smoke plume of the steam with high-temperature water-washed slag in example 3.
FIG. 4 is a schematic view of the arrangement of heat-extracting tube bundles in examples 1 to 3 (direction A).
In the figure: 1-a granulation and white elimination tower, 2-a slag flushing water inlet, 3-a high-temperature slag inlet, 41-a first demister, 42-a second demister, 51-a first hygrothermograph, 52-a second hygrothermograph, 53-a third hygrothermograph, 6-a liquid collecting tray, 7-a spray device, 8-a condenser, 9-a reheater, 10-an exhaust fan, 11-a slag flushing water tank, 12-a movable sealing cover, 13-a spray water unit, 131-a filter, 132-a modified precipitation water tank, 133-a spray water pump, 134-a waste heat recovery device, 14-a medicine adding device, 15-a cold medium conveying pump, 16-a cold medium water supplementing tank, 17-a blast furnace wall cooling system, 18-a heat taking unit, 181-a high-temperature slag runner, 182-a heat taking pipe bundle, 183-heat medium water pump, 19-slag flushing water replenishing tank, 20-steam raising and liquid collecting tray, 201-central baffle tray, 202-lower tray, 21-blower, 22-air inlet of hot blast stove;
a-slag ditch, B-steam reflux pipeline, C-condensed water recovery pipeline, D-spray water pipeline, E-alkali agent pipeline, F-cold medium pipeline and G-hot medium water circulation pipeline.
Detailed Description
Example 1
Referring to fig. 1, the utility model relates to a high-temperature water-washed slag steam colored smoke plume treatment system, which comprises a granulation and white elimination tower 1, a slag washing water inlet 2, a high-temperature slag inlet 3, a spraying device 7, a condenser 8, a second demister 42, a reheater 9 and an exhaust fan 10, which are arranged on the tower body of the granulation and white elimination tower 1 from bottom to top in sequence; the slag washing water tank 11 is connected with the spraying device 7, spraying water is provided for the spraying device 7 through a spraying water pipeline D, the slag washing water tank 11 is connected with the bottom tower wall of the granulating and whitening tower 1 through a slag water channel A, and the top side wall of the slag washing water tank 11 is connected with the tower wall of the granulating and whitening tower 1 through a steam backflow pipeline B; the heat taking unit 18 comprises a high-temperature slag runner 181, a heat taking pipe bundle 182 and a heat medium water pump 183, wherein the high-temperature slag runner 181 is connected with a high-temperature slag inlet 3 at the bottom of the granulating and digesting tower 1, the heat taking pipe bundle 182 is arranged close to the bottom of the high-temperature slag runner 181 and is made of metal, an inlet of the heat taking pipe bundle 182 is connected with a heat medium water outlet of the reheater 9 through a heat medium water circulation pipeline G, and an outlet of the heat taking pipe bundle 182 is sequentially connected with the heat medium water pump 183 and the heat medium water inlet of the reheater 9 through the heat medium water circulation pipeline G.
Further, the heat medium of the reheater 9 is heat medium water, and the heat source is preferably sensible heat of high-temperature slag; referring to fig. 4, a plurality of heat-taking pipe bundles 182 are arranged at the bottom of the high-temperature slag runner 181 at intervals.
Further, the spray water unit 13 comprises a filter 131, a conditioning and precipitating water tank 132, a spray water pump 133 and a waste heat recovery device 134, a liquid collecting device is arranged below the spray device 7, the liquid collecting device is a liquid collecting tray 6, an inlet of the filter 131 is connected with an outlet of the liquid collecting device through a pipeline, an outlet of the filter 131 is connected with an inlet of the conditioning and precipitating water tank 132 through a pipeline, the top of the conditioning and precipitating water tank 132 is connected with a dosing device 14 through an alkali agent pipeline E, the bottom of the conditioning and precipitating water tank 132 is connected with the flushing slag water tank 11 through a condensed water recovery pipeline C, a movable sealing cover 12 is arranged above the flushing slag water tank 11, an inlet of the spray water pump 133 is connected with the lower part of the liquid level of the conditioning and precipitating water tank 132 through a spray water pipeline D, and an outlet of the spray water pump 133 is connected with a spray water inlet of, and a spray water outlet of the waste heat recovery device 134 is connected with a spray water inlet of the spray device 7 through a spray water pipeline D.
Specifically, the liquid collecting device is a liquid collecting tray 6, the outer diameter of the liquid collecting tray 6 is smaller than the inner diameter of the tower body of the high-altitude granulation tower 1, a gap for discharging slag flushing steam is formed between the outer side of the liquid collecting tray 6 and the inner wall of the tower body of the high-altitude granulation tower 1, a discharge pipe is arranged at the bottom of the liquid collecting tray 6, and the outlet of the discharge pipe is connected with the filter 131.
Further, a first demister 41 is arranged between the high-temperature slag inlet 3 and the spraying device 7, the first demister 41 is positioned below the liquid collecting device, and the joint of the steam return pipeline B and the tower wall of the granulating and whitening tower 1 is positioned below the first demister 41; a second demister 42 is also arranged between the condenser 8 and the reheater 9; the first demister 41 and the second demister 42 are not less than two layers, are ridge demisters, and have a layer spacing not less than 1.5 m.
Further, the tower body of the granulation and white elimination tower 1 is further provided with a first hygrothermograph 51, a second hygrothermograph 52 and a third hygrothermograph 53 from bottom to top for monitoring the temperature of the flushing slag steam in real time and monitoring the condensation of the flushing slag steam to a set temperature, wherein the set temperature is the temperature corresponding to the reduction of 50% of the moisture content of the flushing slag steam, the first hygrothermograph 51 is arranged between the first demister 41 and the liquid collecting tray 6, the second hygrothermograph 52 is arranged between the spraying device 7 and the condenser 8, and the third hygrothermograph 53 is arranged between the condenser 8 and the second demister 42.
Further, the cold media of the condenser 8 and the waste heat recovery device 134 are both low-temperature water, preferably blast furnace wall cooling water, the cold media inlets of the condenser 8 and the waste heat recovery device 134 are both connected with the cold media delivery pump 15 and the cold media water replenishing tank 16 in sequence through cold media pipelines F, and the cold media outlets are both connected with the water inlet of the blast furnace wall cooling system 17 through the cold media pipelines F.
Further, the heat exchange tubes of the condenser 8 and the reheater 9 are fluoroplastics, the tube diameter of each heat exchange tube is 10-14 mm, the wall thickness is 0.8-1 mm, and the heat exchange tubes are arranged in a U shape.
Furthermore, the spraying layers of the spraying device 7 are not less than three layers, the interlayer spacing is 3-5 m, and the nozzles on two adjacent spraying layers are arranged in a staggered mode.
A method for treating colored smoke plume of high-temperature water-washed slag steam comprises the following steps:
s1, conveying the high-temperature slag from a blast furnace casting house to a high-temperature slag inlet 3 through a high-temperature slag runner 181, and carrying out slag flushing operation on the high-temperature slag to generate high-temperature slag flushing steam together with slag flushing water from a slag flushing water inlet 2 at the bottom of a granulating and whitening tower 1; the slag-water mixture is conveyed to a slag flushing water tank 11 through a slag ditch A, and high-temperature slag flushing steam generated in the slag flushing water tank 11 flows back to the bottom of the granulating and whitening tower 1 through a steam backflow pipeline B under the sealing action of a movable sealing cover 12;
s2, transferring the high-temperature slag flushing steam generated at the bottom of the granulating and whitening tower 1 upwards along the tower body of the granulating and whitening tower 1, and carrying out primary demisting operation through the first demister 41;
s3, the high-temperature slag flushing steam passing through the first demister 41 continuously moves upwards along the tower body of the granulating and whitening tower 1, primary condensation operation is carried out through the spraying device 7, and spraying water and condensed water are collected in the liquid collecting tray 6;
s4, the slag flushing steam of the spraying device 7 continuously moves upwards along the tower body of the granulating and whitening tower 1, secondary condensation operation is carried out through the condenser 8, and the precipitated condensed water is collected in the liquid collecting tray 6;
s5, the slag flushing steam passing through the condenser 8 continuously moves upwards along the tower body of the granulating and whitening tower 1, and secondary demisting operation is carried out through the second demister 42;
s6, the slag flushing steam passing through the second demister 42 continuously moves upwards along the tower body of the granulating and whitening tower 1, reheating operation is carried out through a reheater 9, the slag flushing steam is discharged through the outlet of the granulating and whitening tower 1 under the action of an exhaust fan 10 after the temperature of the slag flushing steam rises and the relative humidity is obviously reduced, and no colored smoke plume is generated;
s7, the condensed water and the spray water in the liquid collecting tray 6 enter the spray water unit 13 through a pipeline, pass through the filter 131 and then enter the quality-adjusting precipitation water tank 132; the condensed water is conveyed back to the slag flushing water pool 11 through a condensed water recovery pipeline C for water supplementing operation; the spray water is subjected to waste heat recovery operation through a spray water pipe D by a spray water pump 133 and a waste heat recovery device 134 in sequence, and then is conveyed back to the spray device 7 for recycling;
s8, inputting an alkali agent into the quenching and tempering precipitation water tank 132 through an alkali agent pipeline E by the chemical adding device 14, and carrying out quenching and tempering operation to make spray water be alkalescent so as to reduce the corrosion risk of equipment and more efficiently remove acid pollutants contained in slag flushing steam in the spraying and cooling process;
s9, conveying cold media of the condenser 8 and the waste heat recovery device 134 to a water inlet of a blast furnace wall cooling system 17 through a cold medium pipeline F, and realizing cyclic utilization by utilizing the existing cold media in the blast furnace area;
s10, the hot medium water of the reheater 9 is connected to the heat taking pipe bundle 182 through the hot medium water circulation pipeline G, and the sensible heat of the high-temperature slag in the high-temperature slag runner 181 is continuously absorbed.
Example 2
Referring to fig. 2, the abatement system of the present embodiment is modified based on embodiment 1 as follows:
first, the first demister 41, the first hygrothermograph 51, and the drip tray 6 in example 1 are eliminated;
secondly, the filter 131, the tempering and precipitation water tank 132 and the waste heat recovery device 134 in the spray water unit 13 in the embodiment 1 are eliminated, the spray water pump 133 in the spray water unit 13 in the embodiment 1 is reserved, and the slag flushing water replenishing tank 19 is additionally arranged.
Specifically, the spray water unit 13 includes a dosing device 14 and a spray water pump 133, the slag flushing water replenishing tank 19 is connected with the water inlet of the spray device 7 through the spray water pump 133 to provide spray water for the spray device 7, and the dosing device 14 is connected with the top of the slag flushing water replenishing tank 19 through an alkali agent pipeline E.
The system flow of this embodiment is as follows:
s1, conveying the high-temperature slag from a blast furnace casting house to a high-temperature slag inlet 3 through a high-temperature slag runner 181, and carrying out slag flushing operation on the high-temperature slag to generate high-temperature slag flushing steam together with slag flushing water from a slag flushing water inlet 2 at the bottom of a granulating and whitening tower 1; the slag-water mixture is conveyed to a slag flushing water tank 11 through a slag ditch A, and high-temperature slag flushing steam generated in the slag flushing water tank 11 flows back to the bottom of the granulating and whitening tower 1 through a steam backflow pipeline B under the sealing action of a movable sealing cover 12;
s2, transferring high-temperature slag flushing steam generated at the bottom of the granulating and whitening tower 1 upwards along the tower body of the granulating and whitening tower 1, performing primary condensation operation through a spraying device 7, collecting spraying water and condensation water at the bottom of the granulating and whitening tower 1, and conveying the spraying water and the condensation water together to a slag flushing water pool 11 through a slag water ditch A;
s3, the slag flushing steam of the spraying device 7 continuously moves upwards along the tower body of the granulating and whitening tower 1, secondary condensation operation is carried out through the condenser 8, and the precipitated condensed water is collected at the bottom of the granulating and whitening tower 1;
s4, the slag flushing steam passing through the condenser 8 continuously moves upwards along the tower body of the granulating and whitening tower 1, and demisting operation is carried out through the second demister 42;
s5, the slag flushing steam passing through the second demister 42 continuously moves upwards along the tower body of the granulating and whitening tower 1, reheating operation is carried out through a reheater 9, the slag flushing steam is discharged through the outlet of the granulating and whitening tower 1 under the action of an exhaust fan 10 after the temperature of the slag flushing steam rises and the relative humidity is obviously reduced, and no colored smoke plume is generated;
s6, the slag flushing water replenishing tank 19 is connected with a spray water pump 133 and a water inlet of the spray device 7 through a spray water pipeline D to provide spray water for the spray device 7;
s7, inputting an alkali medicament into the slag flushing water replenishing tank 19 through an alkali medicament pipeline E by the medicament adding device 14, and carrying out quenching and tempering operation to make spray water be alkalescent so as to reduce the corrosion risk of equipment and more efficiently remove acid pollutants contained in slag flushing steam in the spraying and cooling process;
s8, conveying the cold medium of the condenser 8 to a water inlet of a blast furnace wall cooling system 17 through a cold medium pipeline F, and realizing recycling by utilizing the existing cold source in the blast furnace region;
s9, the hot medium water of the reheater 9 is connected to the heat taking pipe bundle 182 through the hot medium water circulation pipeline G, and the sensible heat of the high-temperature slag in the high-temperature slag runner 181 is continuously absorbed.
Example 3
Referring to fig. 3, the abatement system of the present embodiment is modified based on embodiment 1 as follows:
firstly, the spray water and condensed water collecting device in embodiment 1 is the liquid collecting tray 6, and the vapor lifting liquid collecting tray 20 is used for replacing the present embodiment;
specifically, the steam-raising liquid-collecting tray 20 comprises a central baffle tray 201 and a lower tray 202, the outer ring of the lower tray 202 is mounted on the inner wall of the tower body of the high-altitude granulation tower 1, the center of the lower tray 202 is provided with an exhaust funnel extending upwards, the section of the exhaust funnel is in a truncated cone shape gradually decreasing from bottom to top, an exhaust channel for upward migration of slag flushing steam is arranged in the exhaust funnel, the central baffle tray 201 is positioned right above the exhaust channel, the outer ring of the central baffle tray 201 is provided with a flow guide edge extending downwards, and the outer diameter of the central baffle tray 201 is larger than the outer diameter of the outlet end of the exhaust channel.
Secondly, the cooling medium in embodiment 1 is blast furnace wall cooling water, the condenser 8 and the cooling medium inlet of the waste heat recovery device 134 are sequentially connected with the cooling medium delivery pump 15 and the cooling medium water replenishing tank 16 through a cooling medium pipeline F, and the cooling medium outlet is connected with the blast furnace wall cooling system 17 through the cooling medium pipeline F, so that the existing cold source in the blast furnace area is effectively utilized; the cold medium in this embodiment is replaced by low-temperature air, the cold medium inlets of the condenser 8 and the waste heat recovery device 134 are both connected with the blower 21 through the cold medium pipeline F, and the cold medium outlets are both connected with the air inlet 22 of the hot blast stove through the cold medium pipeline F, so that heat energy recovery is realized.
Thirdly, on the basis of the second step, the condenser 8 and the heat exchange tube of the waste heat recovery device 134 in the embodiment 1 are made of fluoroplastic materials, the tube diameter is 10-14 mm, the wall thickness is 0.8-1 mm, and the heat exchange tubes are arranged in a U shape; the condenser 8 and the waste heat recovery device 13.4 in this embodiment can be replaced by various types: the heat exchange tube can be a metal finned tube, the tube diameter is not less than 38mm, the wall thickness is 3-5 mm, and the heat exchange tubes are arranged in a tube array manner; the heat exchange tube can be a titanium tube, the diameter of the tube is not less than 25mm, the wall thickness of the tube is 1-1.5 mm, and the heat exchange tubes are arranged in a tube type; or a fluoroplastic pipe with the pipe diameter not more than 50mm and the wall thickness of 1mm, and the heat exchange tubes are arranged in a tubular manner.
The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.
Claims (9)
1. The utility model provides a colored plume governing system of high temperature water flushing sediment steam which characterized in that: comprises a granulation and white elimination tower (1), a slag flushing water inlet (2), a high-temperature slag inlet (3), a spraying device (7), a condenser (8), a second demister (42), a reheater (9) and an exhaust fan (10) which are arranged on a tower body of the granulation and white elimination tower (1) from bottom to top in sequence; the slag washing device is characterized by further comprising a slag washing water tank (11), a spray water unit (13) and a heat taking unit (18), wherein the spray water unit (13) is connected with the spray device (7), spray water is provided for the spray device (7) through a spray water pipeline D, the slag washing water tank (11) is connected with the bottom tower wall of the granulation and whitening tower (1) through a slag water ditch A, and the top side wall of the slag washing water tank (11) is connected with the tower wall of the granulation and whitening tower (1) through a steam backflow pipeline B; the heat taking unit (18) comprises a high-temperature slag runner (181), a heat taking pipe bundle (182) and a heat medium water pump (183), wherein the high-temperature slag runner (181) is connected with a high-temperature slag inlet (3) at the bottom of the granulating and digesting tower (1), the heat taking pipe bundle (182) is arranged at the bottom of the high-temperature slag runner (181), an inlet of the heat taking pipe bundle (182) is connected with a heat medium water outlet of the reheater (9) through a heat medium water circulation pipeline G, and an outlet of the heat taking pipe bundle (182) is sequentially connected with the heat medium water pump (183) and the heat medium water inlet of the reheater (9) through the heat medium water circulation pipeline G.
2. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 1, wherein: the heat medium of the reheater (9) is hot medium water, the heat source is sensible heat of high-temperature slag, and the heat taking tube bundles (182) are arranged at the bottom of the high-temperature slag runner (181) at intervals.
3. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 1, wherein: the spraying layer of the spraying device (7) is not less than three layers, a liquid collecting device is arranged below the spraying device (7), and the liquid collecting device is a liquid collecting tray (6); the outer diameter of the liquid collecting tray (6) is smaller than the inner diameter of the tower body of the granulating and whiting tower (1), a gap for upward migration of slag flushing steam is formed between the outer side of the liquid collecting tray (6) and the inner wall of the tower body of the granulating and whiting tower (1), a discharge pipe is arranged at the bottom of the liquid collecting tray (6), and the outlet of the discharge pipe is connected with the filter (131).
4. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 1, wherein: the spray water unit (13) comprises a filter (131), a conditioning and precipitating water tank (132), a spray water pump (133) and a waste heat recovery device (134), the inlet of the filter (131) is connected with the outlet of the liquid collecting device through a pipeline, the outlet of the filter (131) is connected with the inlet of the conditioning and precipitating water tank (132) through a pipeline, the top of the conditioning and precipitating water tank (132) is connected with a dosing device (14) through an alkali agent pipeline E, the bottom of the conditioning and precipitating water tank (132) is connected with a slag flushing water tank (11) through a condensed water recovery pipeline C, a movable sealing cover (12) is arranged above the slag flushing water tank (11), the inlet of the spray water pump (133) is connected with the liquid level below of the conditioning and precipitating water tank (132) through a spray water pipeline D, the outlet of the spray water pump (133) is connected with the spray water inlet of the waste heat recovery device (, and a spray water outlet of the waste heat recovery device (134) is connected with a spray water inlet of the spray device (7) through a spray water pipeline D.
5. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 4, wherein: a first demister (41) is arranged between the high-temperature slag inlet (3) and the spray device (7), the first demister (41) is positioned below the liquid collecting device, and the joint of the steam return pipeline B and the tower wall of the granulating and whitening tower (1) is positioned below the first demister (41); a second demister (42) is also arranged between the condenser (8) and the reheater (9); the first demister (41) and the second demister (42) are not less than two layers.
6. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 5, wherein: the tower body of the granulation and white elimination tower (1) is further provided with a first hygrothermograph (51), a second hygrothermograph (52) and a third hygrothermograph (53) from bottom to top for monitoring the temperature of slag flushing steam in real time, the first hygrothermograph (51) is arranged between the first demister (41) and the liquid collecting tray (6), the second hygrothermograph (52) is arranged between the spraying device (7) and the condenser (8), and the third hygrothermograph (53) is arranged between the condenser (8) and the second demister (42).
7. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 4, wherein: the cold medium of the condenser (8) and the cold medium of the waste heat recovery device (134) are both low-temperature water, the cold medium inlets of the condenser (8) and the waste heat recovery device (134) are sequentially connected with a cold medium delivery pump (15) and a cold medium water supplementing tank (16) through cold medium pipelines F, and the cold medium outlets are connected with the water inlet of a blast furnace wall cooling system (17) through the cold medium pipelines F.
8. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 4, wherein: the condenser (8) and the cold medium of the waste heat recovery device (134) are both low-temperature air, the condenser (8) and the cold medium inlet of the waste heat recovery device (134) are both connected with the air blower (21) through a cold medium pipeline F, and the cold medium outlet is both connected with the air inlet of the hot air furnace assembly (22) through the cold medium pipeline F.
9. The system for treating the colored smoke plume of the high-temperature water-washed slag steam as defined in claim 3, wherein: the liquid collecting device is a steam lifting liquid collecting tray (20); the steam-raising liquid-collecting tray (20) comprises a central baffle tray (201) and a lower tray (202), the outer ring of the lower tray (202) is arranged on the inner wall of the tower body of the granulating and whiting-eliminating tower (1), the center of the lower tray (202) is provided with an exhaust funnel which extends upwards, the section of the exhaust funnel is in a circular truncated cone shape which is gradually reduced from bottom to top, a steam exhaust channel for flushing slag steam to migrate upwards is arranged in the exhaust funnel, the central baffle tray (201) is positioned right above the steam exhaust channel, the outer ring of the central baffle tray (201) is provided with a flow guide edge which extends downwards, and the outer diameter of the central baffle tray (201) is larger than the outer diameter of the outlet end of the steam exhaust channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021597699.1U CN212757900U (en) | 2020-08-05 | 2020-08-05 | Colored smoke plume governing system of high temperature water flushing sediment steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021597699.1U CN212757900U (en) | 2020-08-05 | 2020-08-05 | Colored smoke plume governing system of high temperature water flushing sediment steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212757900U true CN212757900U (en) | 2021-03-23 |
Family
ID=75040541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021597699.1U Active CN212757900U (en) | 2020-08-05 | 2020-08-05 | Colored smoke plume governing system of high temperature water flushing sediment steam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212757900U (en) |
-
2020
- 2020-08-05 CN CN202021597699.1U patent/CN212757900U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206430578U (en) | A kind of vent gas treatment tower | |
| CN105862053B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN108465368A (en) | Desulfurization and dedusting disappears white device for deep cleaning | |
| CN107198923A (en) | A kind of purification process technique of coke wet quenching steam | |
| CN105887108B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN105536484B (en) | A kind of pollutant pre-corrosion tower based on flue gas condensing | |
| CN109939556A (en) | The flue gas advanced purification system and its method that residual heat utilization-type plume is eliminated | |
| CN110141927B (en) | Blast furnace slag flushing steam whitening system and method based on waste heat utilization | |
| CN112044222A (en) | System and method for removing colored smoke plume of high-temperature water-washed slag steam | |
| CN212757900U (en) | Colored smoke plume governing system of high temperature water flushing sediment steam | |
| CN212818972U (en) | Colored smoke plume desorption system of high temperature water flushing sediment steam | |
| CN112044223A (en) | High-temperature water slag flushing steam colored smoke plume treatment system and method | |
| CN212818973U (en) | Energy-saving water collection and pollutant treatment system for high-temperature water-washed slag exhaust steam | |
| CN212651579U (en) | High-temperature water-washed slag steam pollutant deep treatment system | |
| CN107090302A (en) | A kind of coke wet quenching high temperature steam treatment device | |
| CN211358289U (en) | Steel slag scouring flue gas whitening system | |
| CN112058011A (en) | High-temperature water-washed slag exhaust steam energy-saving water receiving and pollutant treating system and method | |
| CN107083244A (en) | A kind of purifying processing device of coke wet quenching steam | |
| CN112044224A (en) | Deep treatment system and treatment method for high-temperature water-washed slag steam pollutants | |
| CN209900993U (en) | Flue gas of sour reproduction technology takes off white system | |
| CN112444134A (en) | Equipment for collecting flue gas of yellow phosphorus furnace slag and utilizing waste heat of flue gas | |
| CN202610064U (en) | System for using waste steam of flushing cinder of ironmaking blast furnace to prepare soft water and utilizing waste heat | |
| CN206887008U (en) | A kind of purifying processing device of coke wet quenching steam | |
| CN110152483A (en) | A kind of three-stage based on catalytic cracking unit takes off white system and its treatment process | |
| CN110093465B (en) | Blast furnace slag flushing steam whitening system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |