CN111396893A - Melting chlorination roasting volatilization furnace and method for harmlessly treating hazardous waste incineration substances by using same - Google Patents
Melting chlorination roasting volatilization furnace and method for harmlessly treating hazardous waste incineration substances by using same Download PDFInfo
- Publication number
- CN111396893A CN111396893A CN202010338444.1A CN202010338444A CN111396893A CN 111396893 A CN111396893 A CN 111396893A CN 202010338444 A CN202010338444 A CN 202010338444A CN 111396893 A CN111396893 A CN 111396893A
- Authority
- CN
- China
- Prior art keywords
- volatilization
- melting
- furnace
- chlorination
- roasting
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/006—General arrangement of incineration plant, e.g. flow sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/10—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
- F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/20—Supplementary heating arrangements using electric energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/50—Intercepting solids by cleaning fluids (washers or scrubbers)
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a melting chlorination roasting volatilization furnace, which comprises a chlorination roasting volatilization part and a melting chlorination volatilization part, wherein the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part, the top of the chlorination roasting volatilization part is provided with a feed inlet, the side wall of the top is provided with a flue gas outlet, the chlorination roasting volatilization part consists of a preheating zone, a roasting volatilization zone and a combustion chamber, the bottom of the melting chlorination volatilization part is a furnace base, the surface of the furnace base is an inclined plane, a melting chlorination volatilization pool is arranged on the furnace base, an electric heating rod is paved below the surface of the furnace base, and the side wall at the lowest part of the surface of the furnace base is provided with a molten slag outlet.
Description
Technical Field
The invention relates to harmless treatment of hazardous waste, in particular to a melting chlorination roasting volatilization furnace and a method for harmless treatment of hazardous waste incinerates by using the same.
Background
In recent years, the economy of China keeps continuously and rapidly developing, along with the continuous increase of economy and industry and the large development and utilization of resources, the hazardous waste also increases in a certain proportion, the generated quantity is larger and larger, and the environmental hazard brought by the hazardous waste gradually draws attention of people. The waste dangerous wastes mostly contain heavy metals, CaO and Al2O3、SiO2The components required by the building materials are renewable urban mineral resources, so that energy-saving, environment-friendly and efficient harmless and resource-recycling treatment production equipment which can aim at reducing, harmless and recycling hazardous wastes is urgently needed. Currently, most hazardous wastes are disposed of in four ways.
Firstly, incineration residue and fly ash are sent to a hazardous waste landfill for landfill. The burning of hazardous waste is mainly characterized by obvious reduction effect, but the burning residue and fly ash containing heavy metals with high leaching concentration of about 20-30 percent are also generated in the burning process of hazardous waste. The incineration residue and the fly ash contain heavy metals, and also contain harmful components such as dioxin, chlorine salt, sulfate, carbonate and the like. According to the book of hazardous wastes (2016), non-vitreous bottom slag and fly ash from hazardous waste incineration, pyrolysis, etc. are still included in hazardous waste management (waste category HW18, waste code 772-.
According to national regulations, hazardous waste containing heavy metals is detected by hazardous waste identification standard leaching toxicity identification (GB5085.3-2007) according to hazardous waste landfill pollution control standard (GB 18598-2019), if copper in the landfill material is higher than 120 mg/L, lead is higher than 1.2 mg/L, zinc is higher than 120 mg/L, nickel is higher than 2 mg/L, and arsenic is higher than 1.2 mg/L, the landfill material is forbidden to directly enter the hazardous waste landfill site for disposal.
Thirdly, a part of dangerous wastes with high non-ferrous metal content, such as copper-containing sludge, non-ferrous metal smelting flue dust and the like, are mixed into mineral powder of copper, lead, zinc and the like to be extracted and recovered by the traditional non-ferrous metal smelting process. Because the requirements of non-ferrous metal smelting enterprises on the content and the components of the target raw materials are strict. The heavy metal components in the hazardous waste are complex and variable, the content is not equal, and the harmful impurities are more, so the hazardous waste can be only used in a small amount in a blending way in the non-ferrous metal smelting industry, and the using amount is not large.
Fourthly, the dangerous waste is treated by plasma melting. The plasma melting disposal has advantages in the aspects of volume reduction, weight reduction, heavy metal solidification and harmlessness of hazardous wastes. The method specifically comprises the steps of mixing hazardous wastes and additives, carrying out high-temperature melting through plasma to form high-temperature molten slag, and solidifying heavy metals in glassy substances with stable physical and chemical properties under rapid cooling conditions such as air cooling or water quenching cooling without leaching. However, the plasma treatment technology has the disadvantages of expensive equipment cost, high treatment cost, and technical obstruction for rapid popularization of the technology. In addition, the plasma melting disposal process only focuses on the solidification of heavy metal by the molten slag, and has no advantages in the aspects of comprehensive recovery and resource utilization of heavy metal in hazardous wastes.
The four dangerous waste disposal modes have advantages and disadvantages respectively, but the four dangerous waste disposal modes can not synchronously realize the disposal mode of simultaneously recycling the dangerous waste on the basis of harmless disposal.
Disclosure of Invention
The invention provides a melting chlorination roasting volatilization furnace and a method for performing harmless treatment on hazardous waste incineration residues by using the same, aiming at the problem that the existing hazardous waste disposal cannot realize harmless and resource full recycling.
The technical scheme includes that the melting chlorination roasting volatilization furnace comprises a chlorination roasting volatilization part and a melting chlorination volatilization part, the chlorination roasting volatilization part is a vertical roasting furnace, the melting chlorination volatilization part is a horizontal melting furnace, the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part to enable the melting chlorination roasting volatilization furnace to be L-shaped, the chlorination roasting volatilization part comprises a furnace wall, the top of the chlorination roasting volatilization part is provided with a feed inlet, the side wall of the top is provided with a flue gas outlet, a preheating zone, a roasting volatilization zone and a combustion chamber are respectively arranged below the feed inlet, the combustion chamber is provided with a burner a, the bottom of the melting chlorination volatilization part is a furnace base, the surface of the furnace base is an inclined plane, the surface of the furnace base at the connection part with the chlorination roasting volatilization part is high, the space of the furnace base is a melting volatilization pool, an electric heating rod is laid below the surface of the furnace base, the side wall at the lowest part of the surface of the furnace base is provided with a molten slag outlet, the top of the melting chlorination volatilization part is provided with a plurality of.
The invention communicates a vertical roasting furnace and a horizontal melting furnace to form an L-shaped melting, chloridizing, roasting and volatilizing furnace, materials are added from the top end of the vertical chloridizing, roasting and volatilizing furnace, the materials are gradually heated to realize preheating and primary volatilization, the materials are fully melted, chloridized and volatilized after entering the horizontal melting furnace, the vertical chloridizing, roasting and volatilizing furnace plays a role in preheating and volatilizing, the horizontal melting furnace plays a role in deep high-temperature melting, chloridizing and volatilizing, hazardous wastes can be fully roasted and volatilized after the two are combined, valuable metals in the hazardous wastes are volatilized and recovered in a metal chloride form, molten tailings form glassy particles for recovery through water quenching or air quenching, and the hazardous wastes are subjected to harmless treatment and high-efficiency resource recovery and utilization of valuable substances.
The chloridizing roasting can be divided into three types of medium-temperature chloridizing roasting, high-temperature chloridizing roasting and chloridizing segregation according to the shape of a roasting product. The metal chloride produced by moderate-temperature chloridizing roasting remains in the material and is then transferred into solution by leaching, so it is often called chloridizing roasting-leaching. The high-temp. chloridizing roasting method is characterized by that under the condition of a certain temp. and atmosphere, the metal chloride is in the gaseous state and volatilized from the material to be roasted. This is called a chloridizing roasting volatilization method because it is collected by dissolving it in a washing liquid by wet washing. The chloridizing segregation method is that metal chloride is reduced and precipitated in a metal state while chloridizing roasting volatilizes, and then the metal chloride is separated from other components by a physical ore dressing method.
The reason for the implementation of the invention is that the metal chloride generally has the characteristics of low melting point and boiling point, high volatility, water solubility and the like. Under the condition of a certain temperature and atmosphere, the material reacts with the target metal in the material by using a chlorinating agent to generate metal chloride with a lower boiling point, and the metal chloride is volatilized and separated from the material. It is suitable for all solid wastes containing gold, silver, copper, lead, zinc, nickel and tin. The melting chlorination roasting volatilization furnace of the invention utilizes a high-temperature chlorination roasting volatilization method process, combines a high-temperature melting matte gold-catching process, can thoroughly open the package of impurities on micro-fine metal, has high recovery rate of valuable metal, and has the advantage of comprehensively recovering valuable metals such as gold, silver, copper, lead, zinc and the like in materials.
The refractory wall of the invention consists of corundum or silicon carbide refractory bricks, insulating cotton and steel plates in sequence from inside to outside, a flue gas channel is arranged outside the refractory wall, the bottom end of the flue gas channel is communicated with a melting chlorination volatilization part, and the upper end of the flue gas channel is communicated with a chlorination roasting volatilization area through a through hole cut on the refractory wall. The flue gas channel is arranged, so that the volatile flue gas in the horizontal melting furnace can be separated from the descending material of the vertical chlorination roasting volatilization furnace, and the temperature of the descending material of the vertical chlorination roasting volatilization furnace can be conveniently controlled.
In order to increase the time of melting chlorination volatilization, a wedge-shaped baffle is arranged in the melting volatilization pool, the melting volatilization pool is divided into two parts, and the problem that the melt is difficult to flow out due to the excessive accumulation of the melting materials is avoided. The wedge-shaped baffle is not contacted with the top wall of the melting chlorination roasting part, and a melting slag outlet is arranged on the side wall of the included angle between the inclined surface of the wedge-shaped baffle and the surface of the furnace base.
In order to facilitate the control of the process, the invention is provided with a temperature measuring port a on the side wall of the flue gas outlet, a temperature measuring port b on the side wall of the preheating zone, a temperature measuring port c on the side wall of the roasting volatilization zone, a temperature measuring port d on the top wall of the melting chlorination roasting part, an observation port a on the upper part of the side wall of the melting chlorination roasting part, an observation port b on the side wall of the flue gas outlet and an observation port c on the side wall of the combustion chamber.
The method for harmlessly treating the hazardous waste incineration substances by adopting the melting, chloridizing, roasting and volatilizing furnace comprises the following steps:
1) preparation of hazardous waste profile
The hazardous waste residue is refined into 150-mesh powder of 100-;
2) temperature rise by blowing in
Adding the section obtained in the step 1) from top to bottom into the bottom of a chlorination roasting volatilization zone from a feeding hole, and sequentially filling the section upwards until the section is above the feeding hole. After the furnace is fully filled with materials, starting an induced draft fan and a combustion-supporting fan, igniting a burner a and a burner b, electrifying an electric heating rod, and controlling the ventilation volume of the burner a to ensure that the temperature detected at a temperature measuring port b is 800 ℃ plus materials and the temperature detected at a temperature measuring port c is 800 ℃ plus materials;
3) volatilization by roasting
Controlling the section to stay in the roasting and volatilizing area for 20-40 min;
4) melt volatilization
Controlling the ventilation quantity of the burner b, the current of the electric heating rod and the ventilation quantity of the oxygen-enriched air supplementing port to enable the temperature detected at the temperature measuring port d to be 1300-1500 ℃, opening a molten slag outlet to collect molten materials after 20-40min, and performing water quenching or air quenching treatment to obtain glassy particles;
5) flue gas recovery
In the processes of steps 3) and 4), collecting flue gas at a flue gas outlet, heating the volatilized flue gas to 1000-fold-1200 ℃ through a flue gas secondary combustion chamber and a flue gas quenching device which are sequentially matched, removing dioxin, then quickly cooling to below 200 ℃, collecting smoke dust through a dust remover, spraying the smoke gas subjected to dust removal by using alkali liquor, precipitating and filtering the spraying liquid, wherein the smoke dust and a filter cake contain chlorides of valuable metals;
6) continuous production
When the step 4) is carried out, the section bar obtained in the step 1) is directly added from a feed inlet, so that continuous production is realized.
Wherein, in the step 1), the dosage of the chlorinating agent is 6-20% of the mass of the hazardous waste residue, and the chlorinating agent is selected from one or a combination of calcium chloride, sodium chloride or ferric chloride; the dosage of the reducing agent is 2-10% of the weight of the hazardous waste residue powder, and the reducing agent is selected from one or a combination of more of blue carbon powder, coke powder or coal powder; the dosage of the fluxing agent is 10-30% of the mass of the hazardous waste residue powder, and the fluxing agent is selected from one or a combination of more of lime powder, limestone or quartz stone. The alkali liquor used in the step 5) is one of sodium hydroxide aqueous solution, calcium oxide aqueous solution or sodium carbonate aqueous solution.
Drawings
Fig. 1 is a front sectional view of a volatilization furnace of the invention, and each part is respectively as follows:
1. the device comprises a feed inlet, 2, a flue gas outlet, 3, a preheating zone, 4, a roasting and volatilizing zone, 5, a melting and volatilizing tank, 6, a furnace foundation, 7, a refractory wall, 8, temperature measuring ports a and 9, temperature measuring ports b and 10, temperature measuring ports c and 11, a combustion chamber, 12, combustors a and 13, an oxygen-enriched air supplementing port, 14, observation ports a and 15, combustors b and 16, a molten slag outlet, 17, a flue gas channel, 18, an electric heating rod, 19, temperature measuring ports d and 20, observation ports b and 21 and an observation port c.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A melting chlorination roasting volatilization furnace comprises a chlorination roasting volatilization part and a melting chlorination volatilization part, wherein the chlorination roasting volatilization part is a vertical roasting furnace, the melting chlorination volatilization part is a horizontal melting furnace, the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part to enable the melting chlorination roasting volatilization furnace to be L-shaped, the chlorination roasting volatilization part comprises a fire-resistant wall 7, the top of the fire-resistant wall is provided with a feed inlet 1, the side wall of the top is provided with a flue gas outlet 2, a preheating zone 3, a roasting volatilization zone 4 and a combustion chamber 11 are respectively arranged below the feed inlet 1, the combustion chamber 11 is provided with a burner a 12, the bottom of the melting chlorination volatilization part is a furnace base 6, the surface of the furnace base 6 is an inclined plane, the surface of the furnace base 6 connected with the chlorination volatilization part is high, the space of the furnace base 6 is a melting volatilization pool 5, an electric heating rod 18 is laid below the surface of the furnace base 6, the side wall at the lowest part of the surface of the furnace base 6 is provided with a melting slag outlet 16, the top of the melting chlorination volatilization part is provided with.
Example 2
A melting chlorination roasting volatilization furnace comprises a chlorination roasting volatilization part and a melting chlorination volatilization part, wherein the chlorination roasting volatilization part is a vertical roasting furnace, the melting chlorination volatilization part is a horizontal melting furnace, the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part to enable the melting chlorination roasting volatilization furnace to be L-shaped, the chlorination roasting volatilization part comprises a fire-resistant wall 7, the top of the fire-resistant wall is provided with a feed inlet 1, the side wall of the top is provided with a flue gas outlet 2, a preheating zone 3, a roasting volatilization zone 4 and a combustion chamber 11 are respectively arranged below the feed inlet 1, the combustion chamber 11 is provided with a burner a 12, the bottom of the melting chlorination volatilization part is a furnace base 6, the surface of the furnace base 6 is an inclined surface, the surface of the furnace base 6 connected with the chlorination volatilization part is high, the space of the furnace base 6 is a melting volatilization pool 5, an electric heating rod 18 is laid below the surface of the furnace base 6, the side wall at the lowest part of the surface of the furnace base 6 is provided with a molten slag outlet 16, the top of the melting chlorination volatilization part is provided with a plurality of burners b 15, an air inlet 13 is arranged on the top wall of each burner b 15, a supplementary air inlet 13 is arranged on the fire-resistant wall 7, the fire-resistant wall.
Example 3
A melting chlorination roasting volatilization furnace comprises a chlorination roasting volatilization part and a melting chlorination volatilization part, wherein the chlorination roasting volatilization part is a vertical roasting furnace, the melting chlorination volatilization part is a horizontal melting furnace, the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part to enable the melting chlorination roasting volatilization furnace to be L-shaped, the chlorination roasting volatilization part comprises a fire-resistant wall 7 to form a furnace wall, the top of the fire-resistant wall is provided with a feed inlet 1, the side wall of the top is provided with a flue gas outlet 2, a preheating zone 3, a roasting volatilization zone 4 and a combustion chamber 11 are respectively arranged below the feed inlet 1, the combustion chamber 11 is provided with a burner a 12, the bottom of the melting chlorination volatilization part is a furnace base 6, the surface of the furnace base 6 is an inclined plane, the surface of the furnace base 6 connected with the chlorination volatilization part is high, the space of the furnace base 6 is a melting volatilization pool 5, an electric heating rod 18 is laid below the surface of the furnace base 6, the melting volatilization pool 5 is provided with a wedge-shaped baffle, the wedge-shaped baffle is not contacted with the top wall of the melting chlorination roasting volatilization part, the inclined plane is provided with the side wall of the melting volatilization pool 5, the side wall at the included angle of the surface of the furnace base 6 is provided with a melting slag outlet 16, the side wall at the lowest part of the melting volatilization channel, the side wall of the fire-resistant furnace base is provided with the melting volatilization channel, the melting volatilization channel is provided.
Example 4
A melting chlorination roasting volatilization furnace comprises a chlorination roasting volatilization part and a melting chlorination volatilization part, wherein the chlorination roasting volatilization part is a vertical roasting furnace, the melting chlorination volatilization part is a horizontal melting furnace, the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part to enable the melting chlorination roasting volatilization furnace to be L-shaped, the chlorination roasting volatilization part comprises a refractory wall 7 to form a furnace wall, the top of the chlorination roasting volatilization part is provided with a feed inlet 1, the side wall of the top is provided with a flue gas outlet 2, a preheating zone 3, a roasting volatilization zone 4 and a combustion chamber 11 are respectively arranged below the feed inlet 1, the combustion chamber 11 is provided with a combustor a 12, the side wall of the flue gas outlet 2 is provided with a temperature measuring port a 8, the side wall of the preheating zone 3 is provided with a temperature measuring port b 9, the side wall of the roasting volatilization zone 4 is provided with a temperature measuring port c 10, the bottom of the melting chlorination roasting volatilization zone 4 is a furnace base 6, the surface of the furnace base 6 is an inclined plane, the furnace base 6 connected with the chlorination volatilization part is high in surface, the furnace base 6 space of the furnace base 5 is provided with a melting volatilization pool 6, the furnace base is provided with a melting volatilization pool, the furnace base 6, the melting furnace base is provided with a melting furnace base, the melting volatilization baffle, the melting furnace base 6 is provided with a melting furnace base, the melting volatilization baffle, the melting furnace base 6, the melting furnace base is provided with a melting furnace base, the melting volatilization baffle, the melting furnace base is provided with a melting furnace base, the melting.
The mixture of inorganic cyanide (HW33) cyanidation tailings and hazardous waste (HW18) incineration residues is subjected to harmless treatment by using a melting chlorination roasting volatilizing furnace of example 4, and valuable metals are recovered, and the steps are as follows:
1) mixing inorganic cyanide (HW33 cyaniding tailings) and hazardous waste (HW18 incineration residue) according to the weight ratio of 1:1, grinding the mixture to 100 meshes, adding 10% of calcium chloride, 2% of coke powder and 10% of lime powder, molding the mixture into a cylinder with the outer diameter of 50mm, the inner diameter of 15mm and the height of 50mm under pressure, and drying the cylinder at 150 ℃ for later use;
2) adding the section obtained in the step 1) from the feed inlet of the melting chlorination roasting volatilization furnace to the bottom of the chlorination roasting volatilization zone from top to bottom, and sequentially filling the section upwards until the section is above the feed inlet. After the furnace is fully filled with materials, starting an induced draft fan and a combustion-supporting fan, igniting a burner a and a burner b, electrifying an electric heating rod, and controlling the ventilation volume of the burner a to ensure that the temperature detected at a temperature measuring port b is 500 ℃ and the temperature detected at a temperature measuring port c is 1200 ℃; controlling the section material to stay in a preheating zone for 20min and then stay in a roasting volatilization zone for 20 min;
3) controlling the ventilation of the burner b, the current of the electric heating rod and the ventilation of the oxygen-enriched air supply port to enable the temperature detected at the temperature measuring port d to be 1400 ℃, opening a molten slag outlet to collect molten materials after 30min, and performing water quenching treatment to obtain glassy particles;
4) in the processes of the step 2) and the step 3), the volatilized smoke is sequentially heated to 1100-plus 1200 ℃ by a smoke secondary combustion chamber and a smoke quenching device which are matched subsequently, dioxin in the smoke is removed, then the temperature is rapidly reduced to below 200 ℃, smoke dust is collected by a dust remover, the smoke dust after dust removal is sprayed by alkali liquor, the spraying liquid is precipitated and filtered, and the smoke dust and a filter cake contain chlorides of valuable metals.
The product was analyzed and the results are shown in Table 1.
TABLE 1 content of metal component in mixture of cyanidation tailings and incineration residue and recovery rate
| Name (R) | Gold (g/t) | Silver (g/t) | Copper (%) | Lead (%) | Zinc (%) |
| Raw materials | 4.5 | 26.8 | 0.7 | 1.1 | 2.3 |
| Tailings | 0.23 | 4.56 | 0.11 | 0.03 | 0.05 |
| Recovery rate | 95％ | 83％ | 85％ | 97％ | 98％ |
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A melting chlorination roasting volatilization furnace is characterized by comprising a chlorination roasting volatilization part and a melting chlorination volatilization part, wherein the chlorination roasting volatilization part is a vertical roasting furnace, the melting chlorination volatilization part is a horizontal melting furnace, the bottom of the chlorination roasting volatilization part is communicated with one end of the melting chlorination volatilization part to enable the melting chlorination roasting volatilization furnace to be L-shaped, the chlorination roasting volatilization part comprises a furnace wall, the top of the furnace wall is provided with a feed inlet, the side wall of the top of the furnace wall is provided with a flue gas outlet, a preheating zone, a roasting volatilization zone and a combustion chamber are respectively arranged below the feed inlet, the combustion chamber is provided with a combustor a, the bottom of the melting chlorination roasting part is a furnace base, the surface of the furnace base is an inclined plane, the surface of the furnace base at the connection part with the chlorination volatilization part is high, the space of the furnace base is a melting chlorination volatilization pool, an electric heating rod is laid below the surface of the furnace base, the side wall at the lowest part of the surface of the furnace base is provided with a molten slag outlet, the top of the melting chlorination volatilization part is provided with a plurality.
2. The melting chlorination roasting volatilization furnace as claimed in claim 1, wherein a flue gas channel is arranged outside the refractory wall, the bottom end of the flue gas channel is communicated with the melting chlorination volatilization part, and the upper end of the flue gas channel is communicated with the chlorination roasting volatilization area through a through hole drilled in the refractory wall.
3. The melting chlorination roasting volatilization furnace of claim 1, wherein the melting chlorination volatilization pool is provided with a wedge-shaped baffle, the wedge-shaped baffle is not in contact with the top wall of the melting chlorination roasting part, and a molten slag outlet is formed in the side wall of the included angle between the inclined surface of the wedge-shaped baffle and the surface of the furnace base.
4. The melting chlorination roasting volatilization furnace as claimed in claim 1, wherein a temperature measuring port a is arranged on the side wall of the flue gas outlet, a temperature measuring port b is arranged on the side wall of the preheating zone, a temperature measuring port c is arranged on the side wall of the roasting volatilization zone, and a temperature measuring port d is arranged on the top wall of the melting chlorination volatilization part.
5. The melting chlorination roasting volatilization furnace as claimed in claim 1, wherein an observation port a is arranged at the upper part of the side wall of the melting chlorination volatilization part, an observation port b is arranged on the side wall of the flue gas outlet, and an observation port c is arranged on the side wall of the combustion chamber.
6. A method for harmless treatment of hazardous waste incinerators is characterized by being carried out by adopting the melting, chloridizing, roasting and volatilizing furnace of any one of claims 1-5, and comprises the following steps:
1) preparation of hazardous waste profile
The hazardous waste residue is refined into 150-mesh powder of 100-;
2) temperature rise by blowing in
Adding the section obtained in the step 1) from top to bottom into the bottom of a chlorination roasting volatilization zone from a feeding hole, and sequentially filling the section upwards until the section is above the feeding hole. After the furnace is fully filled with materials, starting an induced draft fan and a combustion-supporting fan, igniting a burner a and a burner b, electrifying an electric heating rod, and controlling the ventilation volume of the burner a to ensure that the temperature detected at a temperature measuring port b is 800 ℃ plus materials and the temperature detected at a temperature measuring port c is 800 ℃ plus materials;
3) volatilization by roasting
Controlling the section to stay in the roasting and volatilizing area for 20-40 min;
4) melt volatilization
Controlling the ventilation quantity of the burner b, the current of the electric heating rod and the ventilation quantity of the oxygen-enriched air supplementing port to enable the temperature detected at the temperature measuring port d to be 1300-1500 ℃, opening a molten slag outlet to collect molten materials after 20-40min, and performing water quenching or air quenching treatment to obtain glassy particles;
5) flue gas recovery
In the processes of steps 3) and 4), collecting flue gas at a flue gas outlet, heating the volatilized flue gas to 1000-fold-1200 ℃ through a flue gas secondary combustion chamber and a flue gas quenching device which are sequentially matched, removing dioxin, then quickly cooling to below 200 ℃, collecting smoke dust through a dust remover, spraying the smoke gas subjected to dust removal by using alkali liquor, precipitating and filtering the spraying liquid, wherein the smoke dust and a filter cake contain chlorides of valuable metals;
6) continuous production
When the step 4) is carried out, the section bar obtained in the step 1) is directly added from a feed inlet, so that continuous production is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338444.1A CN111396893A (en) | 2020-04-26 | 2020-04-26 | Melting chlorination roasting volatilization furnace and method for harmlessly treating hazardous waste incineration substances by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338444.1A CN111396893A (en) | 2020-04-26 | 2020-04-26 | Melting chlorination roasting volatilization furnace and method for harmlessly treating hazardous waste incineration substances by using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111396893A true CN111396893A (en) | 2020-07-10 |
Family
ID=71429818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010338444.1A Pending CN111396893A (en) | 2020-04-26 | 2020-04-26 | Melting chlorination roasting volatilization furnace and method for harmlessly treating hazardous waste incineration substances by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111396893A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112393252A (en) * | 2020-11-16 | 2021-02-23 | 江苏中鼎环境工程股份有限公司 | Waste incineration treatment system |
| CN113714246A (en) * | 2021-08-03 | 2021-11-30 | 武汉武锅能源工程有限公司 | Waste incineration fly ash treatment system and method |
| CN114804589A (en) * | 2022-04-29 | 2022-07-29 | 重庆大学 | Preparation method and application of household garbage incineration fly ash molten glass |
| CN115105783A (en) * | 2022-07-06 | 2022-09-27 | 中南大学 | Method for synchronously harmless recycling of waste incineration fly ash and cyanidation tailings |
-
2020
- 2020-04-26 CN CN202010338444.1A patent/CN111396893A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112393252A (en) * | 2020-11-16 | 2021-02-23 | 江苏中鼎环境工程股份有限公司 | Waste incineration treatment system |
| CN113714246A (en) * | 2021-08-03 | 2021-11-30 | 武汉武锅能源工程有限公司 | Waste incineration fly ash treatment system and method |
| CN113714246B (en) * | 2021-08-03 | 2022-12-23 | 武汉武锅能源工程有限公司 | Waste incineration fly ash treatment system and method |
| CN114804589A (en) * | 2022-04-29 | 2022-07-29 | 重庆大学 | Preparation method and application of household garbage incineration fly ash molten glass |
| CN115105783A (en) * | 2022-07-06 | 2022-09-27 | 中南大学 | Method for synchronously harmless recycling of waste incineration fly ash and cyanidation tailings |
| CN115105783B (en) * | 2022-07-06 | 2023-10-24 | 中南大学 | Synchronous harmless recycling method for waste incineration fly ash and cyanidation tailings |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111396893A (en) | Melting chlorination roasting volatilization furnace and method for harmlessly treating hazardous waste incineration substances by using same | |
| Wong et al. | Co-disposal of municipal solid waste incineration fly ash and bottom slag: A novel method of low temperature melting treatment | |
| CN106086415B (en) | The complete set of equipments and method of noble metal are refined in a kind of board waste material from circuit | |
| CN101564731B (en) | Innocent treatment device for waste incineration flying ash | |
| DE69002082T2 (en) | Method and device for treating excavated landfill materials in a plasma-heated cupola. | |
| CN109402399A (en) | The method for handling hazardous waste | |
| CN112795776B (en) | Method for co-processing waste incineration fly ash and copper-containing sludge | |
| CN111484252A (en) | Method for resource utilization of hazardous waste incineration residue by melting, chloridizing and roasting | |
| CN212005700U (en) | Melting chlorination roasting volatilization furnace | |
| CA2582221A1 (en) | Use of coal ash for the safe disposal of mineral waste | |
| CN102321806A (en) | Smelting method for processing zinc leaching residue by oxygen-enriched side-blowing furnace | |
| CN101880774A (en) | Process for removing copper slag and producing crude lead and lead copper matte by adopting melting treatment in bottom-blowing melting bath and device thereof | |
| CN112080645A (en) | Method and device for recovering zinc oxide and iron from zinc-containing soot | |
| CN113551236B (en) | Plasma melting furnace and method of using the same | |
| CN106705057A (en) | Heat-accumulating-type fly ash gasification smelting furnace | |
| JP4313936B2 (en) | Method and apparatus for producing fired product | |
| CN202598533U (en) | Efficient and energy-saving coal gas and pulverized coal mixed burner | |
| CN103334011B (en) | Process for secondary recovery of germanium from germanium refining coal cinder and germanium refining acid sludge | |
| CN107354309A (en) | Comprehensive recovery method of gold concentrate | |
| CN209352958U (en) | Handle the device of hazardous waste | |
| CN108950236A (en) | A kind of technique of clean and effective processing lead containing sludge | |
| CN109536699A (en) | Handle the device of hazardous waste | |
| CN206320754U (en) | Heat accumulating type flying dust melting furnace | |
| CN101818259A (en) | Technology for refining lead from lead chloride slag by means of pyrometallurgy | |
| EP0712811B1 (en) | Method for thermal treating of waste materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |