CN212988055U - Flue gas and waste heat recovery system in roasting zinc sulfide process - Google Patents
Flue gas and waste heat recovery system in roasting zinc sulfide process Download PDFInfo
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- CN212988055U CN212988055U CN202022033370.9U CN202022033370U CN212988055U CN 212988055 U CN212988055 U CN 212988055U CN 202022033370 U CN202022033370 U CN 202022033370U CN 212988055 U CN212988055 U CN 212988055U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model discloses a flue gas and waste heat recovery system of calcination zinc sulfide in-process, it includes zinc sulfide concentrate storage silo, oxidation roasting furnace, exhaust-heat boiler, cyclone, electric dust collector, sulfur dioxide catalytic converter, absorption tower, sulphuric acid storage tank, first electric demister, alkali lye spray tower, alkali lye storage tank, chimney, sulphuric acid product jar and intermediate bin. The utility model has the advantages that the connection structure is simple and easy to realize; the purpose of replacing electric heating is realized, electric energy is saved, the recycling of heat energy is realized, and the production cost of enterprises is effectively saved; the effective recycling of sulfur dioxide resources is realized, and the economic benefit of enterprises is increased.
Description
The technical field is as follows:
the utility model relates to a flue gas and waste heat recovery system thereof, in particular to flue gas and waste heat recovery system in roasting zinc sulfide process.
Background art:
in zinc hydrometallurgy, oxidizing roasting of zinc sulfide concentrate is an important smelting pretreatment process, roasted sand obtained through smelting is sent to the next process, zinc sulfide concentrate can generate a large amount of high-temperature flue gas in the oxidizing roasting process, the high-temperature flue gas contains a large amount of dust and sulfur dioxide gas, the existing treatment method mainly comprises the steps of cooling the zinc sulfide concentrate through a cooler, removing dust through a dust remover, sending the flue gas containing sulfur dioxide to an alkali liquor spray tower to absorb the sulfur dioxide gas, and finally discharging the gas after absorbing the sulfur dioxide; the following problems exist with the above method: 1. the heat carried in the flue gas after roasting is wasted, which causes waste of heat energy and increases the production cost; 2. sulfur dioxide in the flue gas is directly washed, neutralized and absorbed by alkali liquor, so that the waste of sulfur dioxide resources is caused, and the purchase cost of the alkali liquor is increased.
The utility model has the following contents:
an object of the utility model is to provide a connection structure is simple, and has realized the flue gas of calcination zinc sulfide in-process of heat recovery and waste heat recovery system thereof.
The utility model discloses by following technical scheme implement: the patent aims at providing a flue gas and waste heat recovery system in the process of roasting zinc sulfide, which comprises a zinc sulfide concentrate storage bin, an oxidation roasting furnace, a waste heat boiler, a cyclone dust collector, an electric dust collector, a sulfur dioxide catalytic converter, an absorption tower, a sulfuric acid storage tank, a first electric demister, an alkali liquor spraying tower, an alkali liquor storage tank, a chimney, a sulfuric acid product tank and an intermediate bin;
the discharge hole of the zinc sulfide concentrate storage bin is connected with the feed inlet of the oxidizing roasting furnace; the gas outlet of the oxidation roasting furnace is communicated with the gas inlet of the waste heat boiler; the air outlet of the waste heat boiler is communicated with the air inlet of the cyclone dust collector; the air outlet of the cyclone dust collector is communicated with the air inlet of the electric dust collector;
the air outlet of the electric dust collector is communicated with the air inlet of the sulfur dioxide catalytic converter; the gas outlet of the sulfur dioxide catalytic converter is communicated with the gas inlet of the absorption tower; a liquid outlet of the sulfuric acid storage tank is communicated with a liquid inlet of the absorption tower; the gas outlet of the absorption tower is communicated with the gas inlet of the first electric demister;
the gas outlet of the first electric demister is communicated with the gas inlet of the alkali liquor spray tower, and the liquid outlet of the alkali liquor storage tank is communicated with the liquid inlet of the alkali liquor spray tower; the air outlet of the alkali liquor spray tower is communicated with the air inlet of the chimney; the liquid outlet of the absorption tower is communicated with the liquid inlet of the sulfuric acid product tank;
the discharge hole of the oxidation roasting furnace, the ash discharge hole of the waste heat boiler, the dust discharge hole of the cyclone dust collector and the dust discharge hole of the electric dust collector are communicated with the feed inlet of the intermediate bin.
Further, the system also comprises a hydrogen peroxide tower and a second electric demister; the gas outlet of the first electric demister is communicated with the gas inlet of the hydrogen peroxide tower; the gas outlet of the hydrogen peroxide tower is communicated with the gas inlet of the alkali liquor spray tower; and the gas outlet of the alkali liquor spray tower is communicated with the gas inlet of the second electric demister, and the gas outlet of the second electric demister is communicated with the gas inlet of the chimney.
Further, the outer walls of quartz sleeves in the insulation boxes of the first electric demister and the second electric demister are sleeved with spiral coil pipes; the coil pipe is fixed on the inner wall of the insulating box; and the air inlet of the coil is communicated with the air outlet of the waste heat boiler.
The utility model has the advantages that: 1. the utility model has simple connection structure and easy realization; the heat carried in the flue gas is used for heating the waste heat boiler, heating water into steam, and sending the steam into the coil pipes of the first electric demister and the second electric demister to heat the quartz sleeve, so that the quartz sleeve is ensured to be dry, the aim of replacing electric heating is fulfilled, electric energy is saved, the recycling of heat energy is realized, and the production cost of enterprises is effectively saved; 2. the sulfur dioxide in the flue gas is used for producing sulfuric acid products as raw materials, so that effective recycling of sulfur dioxide resources is realized, the produced sulfuric acid products can be sold, and the economic benefits of enterprises are increased.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the connection structure of the insulating box, the quartz sleeve and the coil pipe.
The system comprises a zinc sulfide concentrate storage bin 1, an oxidation roasting furnace 2, a waste heat boiler 3, a cyclone dust collector 4, an electric dust collector 5, a sulfur dioxide catalytic converter 6, an absorption tower 7, a sulfuric acid storage tank 8, a first electric demister 9, an alkali liquor spray tower 10, an alkali liquor storage tank 11, a chimney 12, a sulfuric acid product tank 13, an intermediate bin 14, an insulating box 15, a quartz casing 16, a coil pipe 17, a hydrogen peroxide tower 18 and a second electric demister 19.
The specific implementation mode is as follows:
as shown in fig. 1, a flue gas and waste heat recovery system in a zinc sulfide roasting process comprises a zinc sulfide concentrate storage bin 1, an oxidation roasting furnace 2, a waste heat boiler 3, a cyclone dust collector 4, an electric dust collector 5, a sulfur dioxide catalytic converter 6, an absorption tower 7, a sulfuric acid storage tank 8, a first electric demister 9, an alkali liquor spray tower 10, an alkali liquor storage tank 11, a chimney 12, a sulfuric acid product tank 13, an intermediate bin 14, a hydrogen peroxide tower 18 and a second electric demister 19; the discharge hole of the zinc sulfide concentrate storage bin 1 is connected with the feed inlet of the oxidizing roasting furnace 2; the air outlet of the oxidation roasting furnace 2 is communicated with the air inlet of the waste heat boiler 3; an air outlet of the waste heat boiler 3 is communicated with an air inlet of the cyclone dust collector 4; the air outlet of the cyclone dust collector 4 is communicated with the air inlet of the electric dust collector 5.
The air outlet of the electric dust collector 5 is communicated with the air inlet of the sulfur dioxide catalytic converter 6; the gas outlet of the sulfur dioxide catalytic converter 6 is communicated with the gas inlet of the absorption tower 7; a liquid outlet of the sulfuric acid storage tank 8 is communicated with a liquid inlet of the absorption tower 7; the air outlet of the absorption tower 7 is communicated with the air inlet of the first electric demister 9; the air outlet of the first electric demister 9 is communicated with the air inlet of the hydrogen peroxide tower 18; the gas outlet of the hydrogen peroxide tower 18 is communicated with the gas inlet of the alkali liquor spray tower 10; the liquid outlet of the alkali liquor storage tank 11 is communicated with the liquid inlet of the alkali liquor spray tower 10; the air outlet of the alkali liquor spray tower 10 is communicated with the air inlet of a second electric demister 19, and the air outlet of the second electric demister 19 is communicated with the air inlet of a chimney 12; the liquid outlet of the absorption tower 7 is communicated with the liquid inlet of a sulfuric acid product tank 13.
The discharge hole of the oxidation roasting furnace 2, the ash discharge hole of the waste heat boiler 3, the dust discharge hole of the cyclone dust collector 4 and the dust discharge hole of the electric dust collector 5 are communicated with the feed inlet of the intermediate bin 14.
As shown in fig. 2, a spiral coil 17 is sleeved on the outer wall of the quartz sleeve 16 in the insulating box 15 of the first electric demister 9 and the second electric demister 19; the coil 17 is fixed on the inner wall of the insulating box 15; and the air inlet of the coil 17 is communicated with the air outlet of the waste heat boiler 3.
The working process is as follows: the zinc sulfide concentrate is sent to an oxidation roasting furnace 2 for roasting, and zinc sulfide is oxidized into zinc oxide powder and high-temperature flue gas containing smoke dust and sulfur dioxide; the zinc oxide powder is sent to a middle bin 14 for temporary storage; the high-temperature flue gas is sent into the waste heat boiler 3 for heat exchange, water is heated into steam, and then the steam is sent into a coil 17 in the first electric demister 9 for heating the quartz sleeve 16, so that the drying of the quartz sleeve 16 is ensured, and the recycling of heat energy is realized; the flue gas after heat recovery sequentially passes through a cyclone dust collector 4 and an electric dust collector 5 for dust removal; the flue gas containing sulfur dioxide after dust removal is sent to a sulfur dioxide catalytic converter 6 and is converted into sulfur trioxide under the action of a catalyst, the sulfur trioxide enters an absorption tower 7 and is absorbed by sulfuric acid with the concentration of 98.5 percent to prepare concentrated sulfuric acid, the concentrated sulfuric acid is sent to a sulfuric acid product tank 13, the residual gas after the sulfur trioxide absorption enters a first electric demister 9, air molecules are ionized through a strong electric field formed in the first electric demister 9, a large number of electrons, positive ions and negative ions are instantly generated, and the electrons and the ions perform directional motion under the action of the electric field force to form a medium for collecting sulfuric acid mist drops; simultaneously, sulfuric acid particles are charged, and the charged sulfuric acid droplets directionally move under the action of an electric field force and reach an anode plate for collecting the sulfuric acid droplets. Then, the charged particles release electrons on the polar plate, so that sulfuric acid droplets are gathered and flow into an acid storage tank of the first electric demister 9 under the action of gravity, and the aim of purifying the sulfuric acid droplets is fulfilled; the purified flue gas is sent to a hydrogen peroxide tower 18 for purification, the purified flue gas enters an alkali liquor spray tower 10 for secondary purification, and finally the gas purified by a second electric demister 19 is directly discharged through a chimney 12, so that the environment is protected, the effective recycling of sulfur dioxide resources is realized, the produced sulfuric acid product can be sold, and the economic benefit of enterprises is increased; the smoke dust discharged by the waste heat boiler 3 and the cyclone dust collector 4 contains a large amount of zinc oxide which is recovered to the intermediate bin 14, and the zinc oxide powder in the intermediate bin 14 is sent to the next working procedure for continuous treatment.
The manufacturers of the first electric demister 9 and the second electric demister 19 are Weifang Longjing environmental protection science and technology Limited; the power consumption parts of the first electric demister 9 and the second electric demister 19 mainly comprise two parts, wherein the electric field is high-voltage direct-current power consumption, the hung insulating box 15 is required to be at a constant temperature of 110-130 ℃, an electric heater of the insulating box consumes power, the high-voltage direct-current power consumption is required to be directly used for gas purification work, and the power consumption of the electric heater of the insulating box 15 has the function of enabling the temperature of the quartz sleeve 16 to be higher than the condensation temperature of water vapor, so that the inside and the outside of the quartz sleeve 16 which is insulated and isolated are always kept dry, and the quartz sleeve 16 is ensured to be not conducted at high voltage; the mode of electrically heating the quartz sleeve 16 is adopted, the power consumption of each electric demister produced all the year around is 1520640 degrees, the power consumption is calculated according to 0.38 yuan per degree, the annual power charge of each electric demister is 577843.2 yuan, the electric heating cost is high, and great economic burden is brought to enterprises; the heating mode that water vapor enters the coil 17 is adopted, so that the purpose of replacing electric heating is realized, and electric energy is saved; effectively saving the production cost of enterprises.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A flue gas and waste heat recovery system in the roasting zinc sulfide process is characterized by comprising a zinc sulfide concentrate storage bin, an oxidation roasting furnace, a waste heat boiler, a cyclone dust collector, an electric dust collector, a sulfur dioxide catalytic converter, an absorption tower, a sulfuric acid storage tank, a first electric demister, an alkali liquor spraying tower, an alkali liquor storage tank, a chimney, a sulfuric acid product tank and an intermediate bin;
the discharge hole of the zinc sulfide concentrate storage bin is connected with the feed inlet of the oxidizing roasting furnace; the gas outlet of the oxidation roasting furnace is communicated with the gas inlet of the waste heat boiler; the air outlet of the waste heat boiler is communicated with the air inlet of the cyclone dust collector; the air outlet of the cyclone dust collector is communicated with the air inlet of the electric dust collector;
the air outlet of the electric dust collector is communicated with the air inlet of the sulfur dioxide catalytic converter; the gas outlet of the sulfur dioxide catalytic converter is communicated with the gas inlet of the absorption tower; a liquid outlet of the sulfuric acid storage tank is communicated with a liquid inlet of the absorption tower; the gas outlet of the absorption tower is communicated with the gas inlet of the first electric demister;
the gas outlet of the first electric demister is communicated with the gas inlet of the alkali liquor spray tower, and the liquid outlet of the alkali liquor storage tank is communicated with the liquid inlet of the alkali liquor spray tower; the air outlet of the alkali liquor spray tower is communicated with the air inlet of the chimney; the liquid outlet of the absorption tower is communicated with the liquid inlet of the sulfuric acid product tank;
the discharge hole of the oxidation roasting furnace, the ash discharge hole of the waste heat boiler, the dust discharge hole of the cyclone dust collector and the dust discharge hole of the electric dust collector are communicated with the feed inlet of the intermediate bin.
2. The system for recovering the flue gas and the waste heat thereof in the roasting process of the zinc sulfide as claimed in claim 1, which is characterized by further comprising a hydrogen peroxide tower and a second electric demister; the gas outlet of the first electric demister is communicated with the gas inlet of the hydrogen peroxide tower; the gas outlet of the hydrogen peroxide tower is communicated with the gas inlet of the alkali liquor spray tower; and the gas outlet of the alkali liquor spray tower is communicated with the gas inlet of the second electric demister, and the gas outlet of the second electric demister is communicated with the gas inlet of the chimney.
3. The system for recovering the flue gas and the waste heat thereof in the roasting process of the zinc sulfide as claimed in claim 2, wherein the outer walls of the quartz sleeves in the insulation boxes of the first electric demister and the second electric demister are sleeved with spiral coil pipes; the coil pipe is fixed on the inner wall of the insulating box; and the air inlet of the coil is communicated with the air outlet of the waste heat boiler.
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| CN202022033370.9U CN212988055U (en) | 2020-09-16 | 2020-09-16 | Flue gas and waste heat recovery system in roasting zinc sulfide process |
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| CN202022033370.9U CN212988055U (en) | 2020-09-16 | 2020-09-16 | Flue gas and waste heat recovery system in roasting zinc sulfide process |
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| CN212988055U true CN212988055U (en) | 2021-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114408870A (en) * | 2022-01-21 | 2022-04-29 | 北京北科环境工程有限公司 | Regeneration method of copper sulfide waste agent |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114408870A (en) * | 2022-01-21 | 2022-04-29 | 北京北科环境工程有限公司 | Regeneration method of copper sulfide waste agent |
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