CN212651579U - High-temperature water-washed slag steam pollutant deep treatment system - Google Patents
High-temperature water-washed slag steam pollutant deep treatment system Download PDFInfo
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- CN212651579U CN212651579U CN202021597659.7U CN202021597659U CN212651579U CN 212651579 U CN212651579 U CN 212651579U CN 202021597659 U CN202021597659 U CN 202021597659U CN 212651579 U CN212651579 U CN 212651579U
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Abstract
The utility model provides a high temperature water towards sediment steam pollution thing degree of depth treatment system, including granulation tower, towards sediment water entry, high temperature sediment entry, spray set, defroster, spray the liquid supply system and towards the sediment pond, it links to each other with spray set to spray the liquid supply system, towards the sediment pond pass through the sediment ditch with granulation tower bottom tower wall connection, towards sediment pond top lateral wall pass through the steam backflow pipeline with granulation tower wall connection. The spraying liquid supply system comprises a filter, a sedimentation water tank, a booster water pump and a heat exchanger which are sequentially connected through a spraying water pipeline, a liquid collecting device is arranged below the spraying device, the inlet of the filter is connected with the outlet of the liquid collecting device, the spraying liquid supply system is suitable for comprehensive treatment of slag flushing steam generation areas such as a slag flushing port and a slag flushing pool of a blast furnace, the slag flushing steam of the blast furnace can be deeply purified, the discharge amount of acidic pollutants such as hydrogen sulfide and sulfur dioxide is reduced, the waste heat recycling of the slag flushing steam is realized, and the water consumption of the slag flushing system is greatly reduced.
Description
[ technical field ] A method for producing a semiconductor device
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 pollutant deep treatment system.
[ background of the invention ]
In the metallurgical industry, water is often used as a cooling medium in the cooling process of high-temperature slag generated by industrial furnaces such as iron and steel blast furnaces and converters, colored copper smelting furnaces and aluminum melting furnaces, such as a blast furnace slag water quenching process, a converter slag hot smoldering process or a hot splashing process. Taking a blast furnace as an example, about 80% of blast furnace slag is quenched with water. 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 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 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 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 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 publication number CN110819747A provides a blast furnace slag flushing steam elimination and heat exchanger, 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, large air condensation system, large air consumption and low heat source grade exist.
From the above analysis, although the prior art has provided methods for eliminating white slag and recovering waste heat of a blast furnace slag flushing 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, economic and reliable deep treatment system for high-temperature water slag flushing steam pollutants so as to meet the treatment requirements of the blast furnace slag flushing system.
[ Utility model ] content
The utility model aims at solving the problem among the prior art, a high temperature water towards sediment steam pollution thing degree of depth treatment system is proposed, be applicable to the blast furnace, the converter, the improvement of the steam that high temperature sediment processing system such as molten aluminum furnace produced, the specially adapted blast furnace dashes the cinder notch, dash towards the comprehensive improvement that sediment steam produced region such as slag bath, can make blast furnace towards the sediment steam and obtain deep purification, reduce hydrogen sulfide, the emission of acid pollutants such as sulfur dioxide, realize towards sediment steam waste heat recovery, and greatly reduce towards sediment system water consumption.
In order to realize the above-mentioned purpose, the utility model provides a high temperature water towards sediment steam pollution thing degree of depth treatment system, including granulation tower, set gradually towards sediment water inlet, high temperature sediment entry, spray set and the defroster on the tower body of granulation tower from bottom to top, still including spraying liquid supply system and towards the cinder pond, it links to each other with spray set to spray liquid supply system, provides the shower water for spray set through spray water piping C, towards the cinder pond through sediment ditch A with granulation tower bottom wall connection, towards cinder pond top lateral wall pass through steam backflow pipeline B with granulation tower wall connection.
Preferably, the spraying liquid supply system is a spraying water circulation unit, the spraying water circulation unit comprises a filter, a sedimentation water tank, a booster water pump and a heat exchanger which are sequentially connected through a spraying water pipeline C, a liquid collecting device is arranged below the spraying device, the inlet of the filter is connected with the outlet of the liquid collecting device through the spraying water pipeline C, the top of the sedimentation water tank is connected with a dosing device through a medicament pipeline E and is used for loading alkaline medicaments, the spraying water outlet of the heat exchanger is connected with the spraying water inlet of the spraying device through the spraying water pipeline C, the bottom of the sedimentation water tank is connected with the slag flushing tank through a condensed water recovery pipeline D, and a movable sealing cover is arranged above the slag flushing tank. The heat exchange tube of the heat exchanger is preferably made of fluoroplastic materials, the tube diameter is 10-14 mm, the wall thickness is 0.8-1 mm, the heat exchange tube is arranged in a U-shaped roundabout mode, and cooling water of the blast furnace wall is preferably selected as a cold medium of the heat exchanger.
Preferably, the liquid collecting device is a liquid collecting tray, the liquid collecting tray is arranged between the high-temperature slag inlet and the spraying device, the outer diameter of the liquid collecting tray is smaller than the inner diameter of the granulating tower body, 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 granulating tower body, a discharge pipe is arranged at the bottom of the liquid collecting tray, and the outlet of the discharge pipe is connected with the filter.
Preferably, the spraying layer of the spraying device is not less than three layers, the interlayer spacing is 3-5 m, and a plurality of nozzles are uniformly and densely distributed on each spraying layer.
Preferably, the system further comprises a hygrothermograph, wherein the hygrothermograph is arranged between the spraying device and the demister and is used for monitoring the temperature of the flushing slag steam after condensation in real time, and the temperature of the flushing slag steam after condensation is the temperature corresponding to the reduction of 50% of the moisture content of the flushing slag steam.
Preferably, the granulation tower further comprises an inclined plug and an explosion-proof valve, the inclined plug is arranged above the air induction port at the top of the granulation tower body, the inclined plug inclines upwards towards the air induction port, the included angle between the inclined plug and the horizontal direction is 30-45 degrees, and the explosion-proof valve is arranged on the inclined plug.
Preferably, the system also comprises a chimney, wherein the chimney is a smoke exhaust chimney of a blast furnace cast house environment dust removal system, one side of the bottom of the chimney is connected with an air induction port of the granulation tower body through a steam exhaust flue F, and a first exhaust fan is arranged on the steam exhaust flue F; and a smoke air channel G is arranged on the other side of the bottom of the chimney and is connected with a dust remover outlet of the blast furnace casting house environment dust removing system, and a second exhaust fan is arranged on the smoke air channel G.
Preferably, the liquid collecting device can be a steam-raising liquid collecting disc, the steam-raising liquid collecting disc is arranged between the high-temperature slag inlet and the spraying device, the steam-raising liquid collecting disc comprises a central baffle disc and a lower tray, the outer ring of the lower tray is arranged on the inner wall of the tower body of the granulation tower, an exhaust funnel extending upwards is arranged at the center of the lower tray, the section of the exhaust funnel is in a circular table shape gradually decreasing from bottom to top, a steam exhaust channel for flushing slag steam to migrate upwards is arranged in the exhaust funnel, the central baffle disc is positioned right above the steam exhaust channel, the outer ring of the central baffle disc is provided with a flow guide edge extending downwards, and the outer diameter of the central baffle disc is larger than the outer diameter of the outlet end of the steam exhaust channel.
Preferably, the spraying liquid supply system comprises a dosing device, a slag flushing water supplementing tank and a pressurizing water pump, the dosing device is connected with the top of the slag flushing water supplementing tank through a medicament pipeline E and used for loading an alkaline medicament, and the slag flushing water supplementing tank is connected with a spraying water inlet of the spraying device through the pressurizing water pump and a spraying water pipeline C.
The utility model has the advantages that:
1. the utility model discloses a to the complete treatment system and the method in the blast furnace towards slag notch, towards slag bath class towards slag steam production region, overcome the incomplete defect of prior art treatment scope.
2. The utility model discloses a spray the mode that condensation, muddy wind reheat, make heat exchange system efficiency maximize, both realized dashing the degree of depth condensation of sediment steam and administered, realized the thorough elimination of coloured smoke feather again, solved the environmental protection problem.
3. The utility model discloses a charge device carries out alkaline medicament quenching and tempering to the spray water, can effectively prevent the acid corrosion of equipment to effectively promote the spray water to the improvement of acid pollutants such as hydrogen sulfide, sulfur dioxide, hydrogen chloride in the flushing slag steam, the pollutant emission is reduced.
4. The utility model utilizes the blast furnace wall cooling water as the cold medium of the spray water heat exchanger, and effectively recovers the low-grade waste heat of the slag flushing steam.
5. The utility model discloses make full use of blast furnace casting house environment dust pelletizing system exhaust hot flue gas, also can be the reheat heat source of the hot flue gas of blast furnace hot-blast stove subassembly exhaust after as the condensation towards the sediment steam, with the towards sediment steam homogeneous mixing formation unsaturated hot gas mixture after the spray set condensation, the reheating process is not newly increased the energy consumption, thoroughly eliminates coloured smoke plume, has solved the environmental protection problem.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a system diagram of a high-temperature water-washed slag vapor pollutant advanced treatment system in example 1.
FIG. 2 is a system diagram of the high-temperature water-washed slag vapor pollutant advanced treatment system in example 2.
FIG. 3 is a system diagram of the high-temperature water-washed slag vapor pollutant advanced treatment system in example 3.
In the figure: 1-a granulation tower, 2-a slag flushing water inlet, 3-a high-temperature slag inlet, 4-a liquid collecting tray, 41-a discharge pipe, 5-a spray device, 6-a hygrothermograph, 7-a demister, 8-an inclined plug, 9-an explosion-proof valve, 10-a slag flushing pool, 11-a movable sealing cover, 12-a spray water circulating unit, 121-a filter, 122-a precipitation water tank, 123-a booster water pump, 124-a heat exchanger, 13-a dosing device, 141-a first exhaust fan, 142-a second exhaust fan, 15-a chimney, 16-a slag flushing water replenishing water tank, 17-a steam lifting liquid collecting tray, 171-a central baffle tray, 172-a lower tray and 18-an induced draft port;
a-slag ditch, B-steam return pipeline, C-spray water pipeline, D-condensed water recovery pipeline, E-medicament pipeline, F-steam discharge flue and G-smoke flue.
[ detailed description ] embodiments
Example 1
Referring to fig. 1, the utility model relates to a high temperature water towards slag steam pollution thing degree of depth treatment system, including granulation tower 1, set gradually towards slag water entry 2, high temperature sediment entry 3, spray set 5 and defroster 7 on the tower body of granulation tower 1 from bottom to top, still include spraying liquid supply system and towards slag bath 10, spraying liquid supply system links to each other with spray set 5, provides the shower water for spray set 5 through spray water pipeline C, towards slag bath 10 through slag ditch A with granulation tower 1 bottom tower wall is connected, towards slag bath 10 top lateral wall pass through steam backflow pipeline B with granulation tower 1 tower wall is connected.
Further, the spraying liquid supply system is a spraying water circulation unit 12, the spraying water circulation unit 12 comprises a filter 121, a settling water tank 122, a booster water pump 123 and a heat exchanger 124 which are sequentially connected through a spraying water pipeline C, a liquid collecting device is arranged below the spraying device 5, an inlet of the filter 121 is connected with an outlet of the liquid collecting device through the spraying water pipeline C, the top of the settling water tank 122 is connected with a dosing device 13 through a medicament pipeline E and used for loading alkaline medicaments, a spraying water outlet of the heat exchanger 124 is connected with a spraying water inlet of the spraying device 5 through the spraying water pipeline C, the bottom of the settling water tank 122 is connected with the slag flushing tank 10 through a condensed water recovery pipeline D, and a movable sealing cover 11 is arranged above the slag flushing tank 10.
Furthermore, the heat exchange tube of the heat exchanger 124 is made of fluoroplastic, the tube diameter is 10-14 mm, the wall thickness is 0.8-1 mm, the heat exchange tube is arranged in a U-shaped roundabout manner, and the cooling medium of the heat exchanger 124 is blast furnace wall cooling water.
Further, the liquid collecting device is a liquid collecting tray 4, the liquid collecting tray 4 is arranged between the high-temperature slag inlet 3 and the spraying device 5, the outer diameter of the liquid collecting tray 4 is smaller than the inner diameter of the granulating tower 1, a gap for upward migration of slag flushing steam is formed between the outer side of the liquid collecting tray 4 and the inner wall of the granulating tower 1, a discharge pipe 41 is arranged at the bottom of the liquid collecting tray 4, and the outlet of the discharge pipe 41 is connected with the filter 121.
Furthermore, the spraying layer of the spraying device 5 is not less than three layers, the interlayer spacing is 3-5 m, and a plurality of nozzles are uniformly and densely distributed on each spraying layer.
Further, still include warm and humid acidimeter 6, warm and humid acidimeter 6 set up in between spray set 5 and the defroster 7, warm and humid acidimeter 6 is used for the temperature of the sluicing steam after the real-time supervision condensation, the temperature that the temperature of the sluicing steam after the condensation corresponds for reducing sluicing steam moisture content 50%.
Further, the device also comprises an inclined plug 8 and an explosion-proof valve 9, wherein the inclined plug 8 is arranged above the air induction port 18 at the top of the tower body of the granulation tower 1, the inclined plug 8 inclines upwards towards the air induction port 18, an included angle between the inclined plug 8 and the horizontal direction is 30-45 degrees, and the explosion-proof valve 9 is arranged on the inclined plug 8.
Further, the system also comprises a chimney 15, wherein the chimney 15 is a smoke exhaust chimney of a blast furnace casting house environment dust removal system, one side of the bottom of the chimney 15 is connected with an air induction port 18 of the tower body of the granulation tower 1 through a steam exhaust flue F, and a first exhaust fan 141 is arranged on the steam exhaust flue F; and a smoke and air channel G is arranged on the other side of the bottom of the chimney 15 and is connected with a dust remover outlet of the blast furnace casting house environment dust removing system, and a second exhaust fan 142 is arranged on the smoke and air channel G.
A method for deeply treating high-temperature water-washed slag steam pollutants comprises the following steps:
s1, carrying out slag flushing operation on high-temperature slag from a high-temperature slag inlet 3 and slag flushing water from a slag flushing water inlet 2 at the bottom of a granulation tower 1 to generate high-temperature slag flushing steam; the mixture of the high-temperature slag and the slag flushing water is conveyed to the slag flushing pool 10 through the slag water ditch A, and high-temperature slag flushing steam generated in the slag flushing pool 10 flows back to the bottom of the granulation tower 1 through the steam backflow pipeline B under the sealing action of the movable sealing cover 11.
S2, high-temperature slag flushing steam generated at the bottom of the granulation tower 1 moves upwards along the tower body of the granulation tower 1, cooling and condensation are carried out through a spraying device 5, and spraying water and precipitated condensed water are collected in a liquid collecting tray 4.
S3, the condensed water and the spray water in the liquid collecting tray 4 enter the spray water circulating unit 12 through a spray water pipeline C, pass through a filter 121 and then enter a precipitation water tank 122; conveying the condensed water back to the slag flushing pool 10 through a condensed water recovery pipeline D for water supplementing operation; the spray water is subjected to waste heat recovery operation through the pressurized water pump 123 and the heat exchanger 124 through the spray water pipeline C, and then is conveyed back to the spray device 5 for recycling.
S4, the dosing device 13 inputs an alkaline medicament into the precipitation water tank 122 through the medicament pipeline E to carry out quenching and tempering operations, so that the spray water is in alkalescence, and acid pollutants contained in the slag flushing steam can be removed more efficiently in the spraying and cooling process.
S5, the slag flushing steam passing through the spraying device 5 continuously moves upwards along the tower body of the granulation tower 1, and demisting operation is carried out through a demister 7.
S6, the slag flushing steam passing through the demister 7 continuously moves upwards along the tower body of the granulation tower 1, enters the steam discharge flue F through the air induction port 18, is conveyed to the bottom of the chimney 15 under the action of the first exhaust fan 141, and is uniformly mixed with hot flue gas at the outlet of the blast furnace casting house environment dust removal system to form unsaturated hot mixed gas.
S7, the hot mixed gas moves upwards along the chimney 15 and is discharged through an outlet of the chimney 15, and colored smoke plumes are not generated.
Example 2
Referring to fig. 2, the abatement system of the present embodiment is modified based on embodiment 1 as follows:
the liquid collecting tray 4, the filter 121, the settling water tank 122 and the heat exchanger 124 in the shower water circulating unit 12, and the condensed water recovery pipe D in example 1 are eliminated, and the pressurized water pump 123 in the shower water circulating unit 12 in example 1 is retained and the slag water replenishing tank 16 is newly added.
Specifically, the spraying liquid supply system comprises a dosing device 13, a slag flushing water supplementing tank 16 and a pressurizing water pump 123, wherein the dosing device 13 is connected with the top of the slag flushing water supplementing tank 16 through a medicament pipeline E and used for loading an alkaline medicament, and the slag flushing water supplementing tank 16 is connected with a spraying water inlet of the spraying device 5 through the pressurizing water pump 123 and a spraying water pipeline C.
The system management method of the embodiment 2 comprises the following processes:
s1, carrying out slag flushing operation on high-temperature slag from a high-temperature slag inlet 3 and slag flushing water from a slag flushing water inlet 2 at the bottom of a granulation tower 1 to generate high-temperature slag flushing steam; the mixture of the high-temperature slag and the slag flushing water is conveyed to the slag flushing pool 10 through the slag water ditch A, and high-temperature slag flushing steam generated in the slag flushing pool 10 flows back to the bottom of the granulation tower 1 through the steam backflow pipeline B under the sealing action of the movable sealing cover 11.
S2, high-temperature slag flushing steam generated at the bottom of the granulation tower 1 moves upwards along the tower body of the granulation tower 1, cooling and condensation are carried out through a spraying device 5, spraying water and precipitated condensed water are collected at the bottom of the high-altitude granulation tower 1 and are conveyed to a slag flushing pool 10 together with a slag-water mixture through a slag ditch A; the slag flushing water replenishing tank 16 is connected with the booster water pump 123 and the water inlet of the spraying device 5 through a spraying water pipeline C, and provides spraying water for the spraying device 5.
S3, the dosing device 13 is connected with the top of the slag flushing water supplementing water tank 16 through a medicament pipeline E, and an alkaline medicament is input into the slag flushing water supplementing water tank 16 to make process water supplemented in alkalescence so as to remove acid pollutants contained in slag flushing steam more efficiently in the spraying and cooling process.
And S4, continuously moving the slag flushing steam passing through the spraying device 5 upwards along the tower body of the granulation tower 1, and carrying out demisting operation through a demister 7.
S5, the slag flushing steam passing through the demister 7 continuously moves upwards along the tower body of the granulation tower 1, enters the steam discharge flue F through the air induction port, is conveyed to the bottom of the chimney 15 under the action of the first exhaust fan 141, and is uniformly mixed with hot flue gas at the outlet of the blast furnace casting house environment dust removal system to form unsaturated hot mixed gas.
S6, the hot mixed gas moves upwards along the chimney 15 and is discharged through an outlet of the chimney 15, and colored smoke plumes are not generated.
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 4, and the vapor lifting liquid collecting tray 17 is used for replacement in this embodiment;
specifically, the liquid collecting device is a steam raising liquid collecting disc 17, the steam raising liquid collecting disc 17 is arranged between the high-temperature slag inlet 3 and the spraying device 5, the steam raising liquid collecting disc 17 comprises a central baffle disc 171 and a lower tray 172, the outer ring of the lower tray 172 is arranged on the inner wall of the granulation tower 1, an exhaust funnel extending upwards is arranged at the center of the lower tray 172, the section of the exhaust funnel from bottom to top is in a gradually-reduced circular table shape, a steam exhaust channel for flushing slag steam to move upwards is arranged in the exhaust funnel, the central baffle disc 171 is positioned right above the steam exhaust channel, the outer ring of the central baffle disc 171 is provided with a flow guide edge extending downwards, and the outer diameter of the central baffle disc 171 is larger than the outer diameter of the outlet end of the steam exhaust channel.
Secondly, the heat exchanger 124 in embodiment 1 adopts blast furnace wall cooling water as a cold medium to realize heat energy recovery; in the present embodiment, the cooling medium of the heat exchanger 124 is replaced by low-temperature air.
Thirdly, on the basis of the second embodiment, the heat exchange tube 124 of the heat exchanger in embodiment 1 is made of fluoroplastic, the tube diameter is 10-14 mm, the wall thickness is 0.8-1 mm, and the heat exchange tube is arranged in a U-shaped roundabout manner. The heat exchanger 124 in this embodiment may be replaced in a variety of ways: 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 high temperature water washed slag steam pollutant degree of depth treatment system which characterized in that: including granulation tower (1), set gradually towards slag water entry (2), high temperature sediment entry (3), spray set (5) and defroster (7) on the tower body of granulation tower (1) from bottom to top, still include and spray the liquid supply system and towards slag bath (10), spray the liquid supply system and link to each other with spray set (5), provide the shower water for spray set (5) through spray water pipeline C, towards slag bath (10) through slag ditch A with granulation tower (1) bottom wall of the tower is connected, towards slag bath (10) top lateral wall through steam backflow pipeline B with granulation tower (1) wall of the tower is connected.
2. The high-temperature water slag steam pollutant deep treatment system of claim 1, characterized in that: the spraying liquid supply system is a spraying water circulation unit (12), the spraying water circulation unit (12) comprises a filter (121), a precipitation water tank (122), a booster water pump (123) and a heat exchanger (124) which are sequentially connected through a spraying water pipeline C, a liquid collecting device is arranged below the spraying device (5), an inlet of the filter (121) is connected with an outlet of the liquid collecting device through the spraying water pipeline C, the top of the precipitation water tank (122) is connected with a medicine adding device (13) through a medicine pipeline E and used for loading alkaline medicines, a spraying water outlet of the heat exchanger (124) is connected with a spraying water inlet of the spraying device (5) through the spraying water pipeline C, the bottom of the precipitation water tank (122) is connected with the slag flushing tank (10) through a condensed water recovery pipeline D, a movable sealing cover (11) is arranged above the slag flushing tank (10), the cooling medium of the heat exchanger (124) is blast furnace wall cooling water.
3. The high-temperature water slag steam pollutant deep treatment system of claim 2, characterized in that: the liquid collecting device is a liquid collecting tray (4), the liquid collecting tray (4) is arranged between the high-temperature slag inlet (3) and the spraying device (5), the outer diameter of the liquid collecting tray (4) is smaller than the inner diameter of the granulating tower body (1), a gap for upward migration of slag flushing steam is formed between the outer side of the liquid collecting tray (4) and the inner wall of the granulating tower body (1), a discharging pipe (41) is arranged at the bottom of the liquid collecting tray (4), and the outlet of the discharging pipe (41) is connected with the filter (121).
4. The high-temperature water slag steam pollutant deep treatment system of claim 3, characterized in that: the spraying layer of the spraying device (5) is not less than three layers, the interlayer spacing is 3-5 m, and a plurality of nozzles are uniformly and densely distributed on each spraying layer.
5. The high-temperature water slag steam pollutant deep treatment system of claim 3, characterized in that: still include warm and humid acidimeter (6), warm and humid acidimeter (6) set up in between spray set (5) and defroster (7), warm and humid acidimeter (6) are used for the towards sediment steam temperature after the real-time supervision condensation.
6. The high-temperature water slag steam pollutant deep treatment system of claim 3, characterized in that: the granulation tower is characterized by further comprising an inclined plug (8) and an explosion-proof valve (9), wherein the inclined plug (8) is arranged above the air induction port (18) at the top of the tower body of the granulation tower (1), the inclined plug (8) inclines upwards towards the air induction port (18) and forms an included angle of 30-45 degrees with the horizontal direction, and the explosion-proof valve (9) is arranged on the inclined plug (8).
7. The high-temperature water slag steam pollutant deep treatment system of claim 6, characterized in that: the system is characterized by further comprising a chimney (15), wherein the chimney (15) is a smoke exhaust chimney of a blast furnace casting house environment dust removal system, one side of the bottom of the chimney (15) is connected with an air induction port (18) of the tower body of the granulation tower (1) through a steam discharge flue F, and a first exhaust fan (141) is arranged on the steam discharge flue F; and a smoke and air channel G is arranged on the other side of the bottom of the chimney (15) and connected with a dust remover outlet of the blast furnace casting house environment dust removing system, and a second exhaust fan (142) is arranged on the smoke and air channel G.
8. The high-temperature water slag steam pollutant deep treatment system of claim 2, characterized in that: the liquid collecting device is a steam raising and collecting tray (17), the steam raising and collecting tray (17) is arranged between the high-temperature slag inlet (3) and the spraying device (5), the steam raising and collecting tray (17) comprises a central baffle disc (171) and a lower tray (172), the outer ring of the lower tray (172) is installed on the inner wall of the granulation tower (1), the center of the lower tray (172) is provided with an exhaust funnel extending upwards, the cross section of the exhaust funnel is in a circular table shape gradually decreasing from bottom to top, a steam exhaust channel for flushing slag steam to migrate upwards is arranged in the exhaust funnel, the central baffle disc (171) is located right above the steam exhaust channel, the outer ring of the central baffle disc (171) is provided with a flow guide edge extending downwards, and the outer diameter of the central baffle disc (171) is larger than the outer diameter of the outlet end of the steam exhaust channel.
9. The high-temperature water slag steam pollutant deep treatment system of claim 1, characterized in that: the spraying liquid supply system comprises a dosing device (13), a slag flushing water replenishing tank (16) and a pressurizing water pump (123), wherein the dosing device (13) is connected with the top of the slag flushing water replenishing tank (16) through a medicament pipeline E and used for loading an alkaline medicament, and the slag flushing water replenishing tank (16) is connected with a spraying water inlet of the spraying device (5) through the pressurizing water pump (123) and a spraying water pipeline C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021597659.7U CN212651579U (en) | 2020-08-05 | 2020-08-05 | High-temperature water-washed slag steam pollutant deep treatment system |
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