CN111282402A - Comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas - Google Patents
Comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas Download PDFInfo
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- CN111282402A CN111282402A CN202010087961.6A CN202010087961A CN111282402A CN 111282402 A CN111282402 A CN 111282402A CN 202010087961 A CN202010087961 A CN 202010087961A CN 111282402 A CN111282402 A CN 111282402A
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- tail gas
- ammonium salt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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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
- Y02P10/20—Recycling
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a comprehensive recovery and utilization device for noble metal ammonium salt heating decomposition tail gas, which comprises a roasting furnace, an exhaust pipe and a tail gas absorber, wherein two ends of the exhaust pipe are respectively connected with an exhaust opening of the roasting furnace and an exhaust opening of the tail gas absorber, the exhaust pipe comprises an exhaust insertion pipe, a polytetrafluoroethylene hose and a heat insulation layer wrapped outside the exhaust insertion pipe, and the tail gas absorber comprises an ammonium chloride recovery tank, an ejector and a centrifugal pump, wherein the ejector is communicated with the top of the ammonium chloride recovery tank. The device can effectively solve the problem of tail gas emission caused by heating and decomposing the precious metal ammonium salt in the precious metal metallurgy industry.
Description
Technical Field
The invention relates to the field of precious metal metallurgy, in particular to a comprehensive recycling device for precious metal ammonium salt heating decomposition tail gas.
Background
In the noble metal metallurgy industry, noble metal purification is usually obtained by heating and decomposing noble metal ammonium salt, a large amount of ammonia gas and hydrogen chloride gas and a small amount of noble metal powder are generated in the reaction process, the ammonia gas is colorless and irritant gas, the density of the ammonia gas is lower than that of air at normal temperature, the ammonia gas is easy to escape into the air, the human body is sucked, and the safety of the working environment is influenced; the hydrogen chloride has strong corrosivity and seriously corrodes a roasting furnace mouth and part of a furnace body; the noble metal powder is carried and scattered to bring the process loss.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas, which consists of an ammonium chloride recycling tank, an ejector, a centrifugal pump and a valve, wherein the ammonium chloride recycling tank is a cylindrical barrel made of PP materials, the ejector is a Venturi structure made of PP materials, negative pressure is generated for system exhaust, and meanwhile, the device also has the function of absorbing ammonia gas, hydrogen chloride gas and a small amount of noble metal powder, and solves the problem of tail gas emission generated by noble metal ammonium salt heating decomposition in the prior noble metal metallurgy industry.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a comprehensive recycling device for tail gas generated by heating decomposition of precious metal ammonium salt comprises a roasting furnace, an exhaust pipe and a tail gas absorber, wherein two ends of the exhaust pipe are respectively connected with an exhaust opening of the roasting furnace and an exhaust opening of the tail gas absorber, the exhaust pipe comprises an exhaust insertion pipe, a polytetrafluoroethylene hose and a heat insulation layer wrapped outside the exhaust insertion pipe, the tail end of the exhaust insertion pipe is connected with the polytetrafluoroethylene hose, the tail gas absorber comprises an ammonium chloride recovery tank, an ejector and a centrifugal pump, the ejector is communicated with the top of the ammonium chloride recovery tank, a discharge opening on one side of the bottom of the ammonium chloride recovery tank is connected with the centrifugal pump through a connecting valve, a pipeline is vertically connected to a pump head of the centrifugal pump, a three-way joint is embedded in the pipeline, and one end of the three ends of the three-way joint is externally connected with an output valve through the, the other two ends are connected with the ejector through a pipeline, and a control valve is arranged between the three-way joint and the ejector.
Preferably, one side of the roasting furnace is hinged with a furnace door, the furnace door is provided with an exhaust port communicated with the inner cavity of the roasting furnace, and the exhaust port is hermetically and movably matched with a furnace opening plug.
Preferably, the front end of the air suction insertion pipe is movably inserted on the furnace opening plug.
Preferably, an included angle of 135 degrees is formed between the air suction insertion pipe and the polytetrafluoroethylene hose.
Preferably, the air exhaust insertion tube is made of corundum.
Preferably, the ammonium chloride recovery tank is a cylindrical barrel made of PP materials.
Preferably, the ejector is a venturi structure made of PP materials.
(III) advantageous effects
Compared with the prior art, the invention provides a comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas, which has the following beneficial effects:
1. the roasting furnace door is provided with the exhaust port, so that gas released by decomposition reaction can be effectively prevented from accumulating in the hearth, and the service life of the furnace body is delayed;
2. the two ends of the polytetrafluoroethylene hose of the exhaust tube are respectively and tightly connected with the exhaust insertion tube and the ejector, the exhaust insertion tube and the polytetrafluoroethylene hose are connected in a 135-degree manner, so that gas can be smoothly discharged conveniently, and ammonium chloride crystals generated by reaction are not easy to accumulate;
3. the tail gas absorber consists of an ammonium chloride recovery tank, an ejector, a centrifugal pump and a valve, wherein the ammonium chloride recovery tank can recover trace platinum group metals volatilized along with ammonium chloride, the ejector generates negative pressure for system exhaust, and simultaneously has the function of absorbing ammonia gas, hydrogen chloride gas and a small amount of precious metal powder;
4. the solution containing ammonium chloride recovered by the device can be recycled after concentration, and the environmental pollution and consumption can be effectively reduced.
Drawings
FIG. 1 is a system diagram of a comprehensive tail gas recycling device of the present invention.
In the figure: 1 roasting furnace, 11 furnace doors, 12 exhaust ports, 13 furnace opening plugs, 2 exhaust pipes, 21 exhaust insertion pipes, 22 polytetrafluoroethylene hoses, 23 heat preservation layers, 3 tail gas absorbers, 31 ammonium chloride recovery tanks, 32 ejectors, 33 centrifugal pumps, 34 connecting valves, 35 control valves and 36 output valves.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the comprehensive recycling device for the precious metal ammonium salt heating decomposition tail gas comprises a roasting furnace 1, an exhaust pipe 2 and a tail gas absorber 3, wherein one side of the roasting furnace 1 is hinged with a furnace door 11, the furnace door 11 is provided with an exhaust port 12 communicated with the inner cavity of the roasting furnace 1, the exhaust port 12 is hermetically and movably matched with a furnace mouth plug 13, two ends of the exhaust pipe 2 are respectively connected with the exhaust port of the roasting furnace 1 and the exhaust port of the tail gas absorber 3, the exhaust pipe 2 comprises an exhaust insertion pipe 21, a polytetrafluoroethylene hose 22 and a heat insulation layer 23 wrapped outside the exhaust insertion pipe 21, the exhaust insertion pipe 21 is made of a corundum material and can resist corrosion, the front end of the exhaust insertion pipe 21 is movably inserted into the furnace mouth plug 13, the tail end of the exhaust insertion pipe 21 is connected with the polytetrafluoroethylene hose 22, and an included angle of 135 degrees is formed between the exhaust insertion pipe 21 and the polytetrafluoroethylene hose 22, the smooth discharge of gas of being convenient for, and the ammonium chloride crystallization that the reaction produced is difficult for piling up, setting up of heat preservation 23 can effectively prevent premature cooling ammonia and hydrogen chloride gas reaction to generate ammonium chloride and block up exhaust tube 2, tail gas absorber 3 include ammonium chloride recovery tank 31, with ejector 32 and the centrifugal pump 33 of the top intercommunication of ammonium chloride recovery tank 31, ammonium chloride recovery tank 31 is PP material cylindricality bucket, ejector 32 is the venturi structure of PP material, produces the negative pressure for the system's exhaust, also plays the function of absorbing ammonia, hydrogen chloride gas and a small amount of precious metal powder simultaneously, the discharge port of ammonium chloride recovery tank 31 bottom one side pass through connecting valve 34 with centrifugal pump 33 is connected, be connected with a pipeline on centrifugal pump 33's the pump head perpendicularly, the pipeline is embedded to have a three way connection, in three end of three way connection, one end of the three-way joint is connected with an output valve 36 through the outside of the pipeline, the other two ends of the three-way joint are connected with the ejector 32 through the pipeline, and a control valve 35 is arranged between the three-way joint and the ejector 32.
According to the invention, precious metal ammonium salt is heated and decomposed by a roasting furnace, one end of an air exhaust insertion pipe 21 is inserted into the heating furnace, the polytetrafluoroethylene hose 22 at the other end of an air exhaust pipe 2 is connected with a tail gas absorber 3, and ammonia gas, hydrogen chloride gas and a small amount of precious metal powder which are decomposed by reaction are absorbed by the tail gas absorber 3. Before the device is used, clear water with the water level of 1/2-2/3 needs to be injected into the ammonium chloride recovery tank 31, the two ends of the polytetrafluoroethylene hose 22 of the exhaust pipe 2 are respectively and tightly connected with the exhaust insertion pipe 21 and the ejector 32, one end of the furnace door 11 inserted into the roasting furnace 1 is movably inserted and connected, and the polytetrafluoroethylene hose can be inserted into the exhaust port 12 of the roasting furnace 1 according to the reaction stage.
When the method is used, the precious metal ammonium salt is placed into a hearth of a roasting furnace 1, a furnace door 11 is closed, an exhaust port 12 on the furnace door 11 is blocked by a furnace opening plug 13, the furnace opening plug 13 is opened and heated to 250 ℃, the furnace opening plug 13 is taken down, an air extraction insertion tube 21 is inserted, an output valve 36 is closed, a connecting valve 34 and a control valve 35 are opened, a centrifugal pump 33 is started, clean water in an ammonium chloride recovery tank 31 is pumped to an ejector 32, at the moment, a micro negative pressure is generated at an exhaust tube 2, when the temperature in the roasting furnace 1 reaches 350 ℃, the precious metal ammonium salt starts to decompose to generate ammonia gas and hydrogen chloride, the ammonia gas and the hydrogen chloride in the roasting furnace 1 enter the ejector 32 along the exhaust tube 2 to be mixed with water to generate an ammonium chloride solution, the ammonium chloride solution flows into the ammonium chloride recovery tank 31, the water flow continuously circulates the ammonium chloride; when the temperature in the roasting furnace 1 reaches 400 ℃, the noble metal ammonium salt is completely decomposed, the air exhaust insertion pipe 21 is drawn out, and the centrifugal pump 33 is stopped.
The device can effectively solve the problem of tail gas emission generated by heating decomposition of the precious metal ammonium salt in the precious metal metallurgy industry, ammonia gas and hydrogen chloride gas are fully absorbed and recycled, and precious metal powder is washed and settled in the ammonium chloride recovery tank 31.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (7)
1. The utility model provides a comprehensive recovery and utilization device of noble metal ammonium salt heating decomposition tail gas, includes roaster (1), exhaust tube (2) and tail gas absorber (3), its characterized in that: the two ends of the air extraction pipe (2) are respectively connected with an air extraction opening of the roasting furnace (1) and an air extraction opening of the tail gas absorber (3), the air extraction pipe (2) comprises an air extraction insertion pipe (21), a polytetrafluoroethylene hose (22) and a heat insulation layer (23) wrapped outside the air extraction insertion pipe (21), the tail end of the air extraction insertion pipe (21) is connected with the polytetrafluoroethylene hose (22), the tail gas absorber (3) comprises an ammonium chloride recovery tank (31), an ejector (32) communicated with the top of the ammonium chloride recovery tank (31) and a centrifugal pump (33), a discharge opening on one side of the bottom of the ammonium chloride recovery tank (31) is connected with the centrifugal pump (33) through a connecting valve (34), a pipeline is vertically connected to a pump head of the centrifugal pump (33), a three-way joint is embedded in the pipeline, and three ends of the three-way joint, one end of the three-way joint is connected with an output valve (36) through the outside of the pipeline, the other two ends of the three-way joint are connected with the ejector (32) through the pipeline, and a control valve (35) is arranged between the three-way joint and the ejector (32).
2. The comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas according to claim 1, characterized in that: one side of the roasting furnace (1) is hinged with a furnace door (11), the furnace door (11) is provided with an exhaust port (12) communicated with the inner cavity of the roasting furnace (1), and the exhaust port (12) is hermetically and movably matched with a furnace opening plug (13).
3. The comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas according to claims 1 and 2, which is characterized in that: the front end of the air exhaust insertion pipe (21) is movably inserted on the furnace mouth plug (13).
4. The comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas according to claim 1, characterized in that: an included angle of 135 degrees is formed between the air suction insertion pipe (21) and the polytetrafluoroethylene hose (22).
5. The comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas according to claim 1, 3 or 4, characterized in that: the air exhaust insertion tube (21) is made of corundum.
6. The comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas according to claim 1, characterized in that: the ammonium chloride recovery tank (31) is a cylindrical barrel made of PP materials.
7. The comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas according to claim 1, characterized in that: the ejector (32) is of a Venturi structure made of PP materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010087961.6A CN111282402A (en) | 2020-02-12 | 2020-02-12 | Comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010087961.6A CN111282402A (en) | 2020-02-12 | 2020-02-12 | Comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas |
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| CN111282402A true CN111282402A (en) | 2020-06-16 |
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| CN202010087961.6A Pending CN111282402A (en) | 2020-02-12 | 2020-02-12 | Comprehensive recycling device for noble metal ammonium salt heating decomposition tail gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735135A (en) * | 2021-09-08 | 2021-12-03 | 先导薄膜材料有限公司 | Ammonium chloride recycling device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151463A (en) * | 2011-05-11 | 2011-08-17 | 厦门大学 | Device for absorbing tail gas generated by calcining of kaoline |
| CN202078847U (en) * | 2011-04-18 | 2011-12-21 | 深圳市正金贵金属有限公司 | Precious metal tail gas recovering and purifying system |
| US20160256817A1 (en) * | 2014-03-21 | 2016-09-08 | Climax Molybdenum Company | Systems for recovering ammonia |
| CN107217143A (en) * | 2017-05-12 | 2017-09-29 | 江西铜业集团公司 | A kind of method of processing platinum group metal chloride precipitation slag |
| CN207203801U (en) * | 2017-08-25 | 2018-04-10 | 金川集团股份有限公司 | A kind of osmium, ruthenium gas absorbing device |
| CN208049696U (en) * | 2018-01-19 | 2018-11-06 | 河南神马催化科技股份有限公司 | A kind of roaster tail gas recovery system |
| CN109631599A (en) * | 2018-12-17 | 2019-04-16 | 嘉善鑫海精密铸件有限公司 | A kind of Mechanical processing of casting sintering furnace waste gas purification apparatus |
-
2020
- 2020-02-12 CN CN202010087961.6A patent/CN111282402A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202078847U (en) * | 2011-04-18 | 2011-12-21 | 深圳市正金贵金属有限公司 | Precious metal tail gas recovering and purifying system |
| CN102151463A (en) * | 2011-05-11 | 2011-08-17 | 厦门大学 | Device for absorbing tail gas generated by calcining of kaoline |
| US20160256817A1 (en) * | 2014-03-21 | 2016-09-08 | Climax Molybdenum Company | Systems for recovering ammonia |
| CN107217143A (en) * | 2017-05-12 | 2017-09-29 | 江西铜业集团公司 | A kind of method of processing platinum group metal chloride precipitation slag |
| CN207203801U (en) * | 2017-08-25 | 2018-04-10 | 金川集团股份有限公司 | A kind of osmium, ruthenium gas absorbing device |
| CN208049696U (en) * | 2018-01-19 | 2018-11-06 | 河南神马催化科技股份有限公司 | A kind of roaster tail gas recovery system |
| CN109631599A (en) * | 2018-12-17 | 2019-04-16 | 嘉善鑫海精密铸件有限公司 | A kind of Mechanical processing of casting sintering furnace waste gas purification apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735135A (en) * | 2021-09-08 | 2021-12-03 | 先导薄膜材料有限公司 | Ammonium chloride recycling device and method |
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Application publication date: 20200616 |