LU500524B1 - Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component - Google Patents

Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component Download PDF

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Publication number
LU500524B1
LU500524B1 LU500524A LU500524A LU500524B1 LU 500524 B1 LU500524 B1 LU 500524B1 LU 500524 A LU500524 A LU 500524A LU 500524 A LU500524 A LU 500524A LU 500524 B1 LU500524 B1 LU 500524B1
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LU
Luxembourg
Prior art keywords
mercury
stainless steel
steel material
activated carbon
material tank
Prior art date
Application number
LU500524A
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German (de)
Inventor
Qinzhong Feng
Gang Chen
Zhengjie Zhang
Yang Chen
Liyuan Liu
Chunyan Shao
Xiaoming Jiang
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Zhongke Jingtou Environmental Tech Jiangsu Co Ltd
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Priority to LU500524A priority Critical patent/LU500524B1/en
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Publication of LU500524B1 publication Critical patent/LU500524B1/en

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/30—Active carbon
    • C01B32/354—After-treatment
    • C01B32/36—Reactivation or regeneration
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/06—Operating or servicing

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

The invention provides a device and a recovery method for recovering mercury and activated carbon from waste mercury catalyst multi-components in an environmentally-friendly way, so as to solve the problems of environmental pollution and low recovery efficiency. The main points of the invention are as follows: feeding materials to a material groove on a chain conveyor; electro-reduction is carried out on the fully loaded material tank; cleaning the ultrasonic oscillator; at the same time, the second material tank enters the electric reduction station for electric reduction; Unloading and returning; materials enter an activated carbon regeneration device to generate regenerated activated carbon; open the mercury valve regularly. The method has the positive effects that the technological process is clean, and almost no mercury vapor is generated in the whole production process; it has high degree of automation as well as high efficiency and can also produce regenerated activated carbon.

Description

DESCRIPTION Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component
TECHNICAL FIELD The invention relates to a device and a recovery method for recovering mercury and activated carbon from waste mercury catalyst multi-components, in particular to a method for recovering mercury and activated carbon from waste mercury catalyst multi-components in an integrated device with an electrolyzer as the core by using thermally induced phase separation.
BACKGROUND In view of the waste mercury catalyst produced in PVC production by calcium carbide method, the following disposal methods and devices are mainly adopted: (1) using waste mercury catalyst as raw material, recovering regenerated mercury by pyrodistillation furnace; using waste mercury catalyst as raw material, using chemical activation device to recover and produce regenerated mercury catalyst; a process device for recovering waste catalyst HgCl, and activated carbon from oxygen-controlled carbonization system device.
The pyrodistillation furnace firstly separates mercuric chloride from mercury catalyst by chemical impregnation and chemical method, then obtaining metallic mercury by roasting, condensing and other processes. There are serious environmental pollution, high energy consumption, backward device and other problems in this process.
At present, most of the waste mercury catalysts are treated by pyrodistillation device, and the structure of carrier activated carbon is damaged during distillation, so it can only be used in the form of heat energy; the distillation process is easy to produce mercury-containing waste gas and smoke dust. Although there are environmental protection facilities, the overall effect is not ideal, which 1s easy to cause secondary pollution of the operation workshop and the surrounding environment.
SUMMARY Aiming at the disadvantages of the prior art, the invention provides a device and a recovery method for recovering mercury and activated carbon from waste mercury catalyst multi-components.
The device for recovering mercury and activated carbon from waste mercury catalyst multi-components comprises a horizontal electrolyzer, an anode and a cathode, which is characterized in that: the anode is arranged in the electrolyte of the horizontal electrolyzer at the top and the cathode is arranged at the bottom; the cathode is a copper plate which is laid flat in the electrolyte, and each side end (other than the front end and the rear end) of the cathode is fixed on the cell wall of the same side; an ultrasonic oscillator is also arranged on the floor of the horizontal electrolyzer, which is located at the next station of the electric reduction (cathode) station. A mercury discharge valve is arranged on the floor of the electrolyzer; two parallel synchronous transmission chains form a chain conveyor, and the chain conveyor runs in a closed loop around the upper and lower surfaces of the electrolytic tank; a reversing wheel of the chain conveyor is installed on the wall of the electrolyzer, so that the chain of the chain conveyor running on the electrolyzer can run horizontally in the channel formed between the anode and the cathode; each chain is provided with at least two reversing wheels which are respectively arranged at the entrance and exit of the channel; all stainless steel material tanks are hung on the chain conveyor in turn, specifically, the two edges corresponding to the rectangular notch of each stainless steel material tank are hung on the chain on the same side at the same time, that is, the stainless steel material tank is located between two chains; a drawer-type cover plate is arranged on the material trough, and the floor of the material trough is grid-shaped; a clapboard is arranged between the ultrasonic oscillator and the cathode, and the clapboard is provided with a through hole through which a material tank can pass; the reversing wheel 1s installed at the height of the electrolyzer wall so that the bottom of the stainless steel material tank can fall on the copper plate, and the height of the stainless steel material tank can make the channel formed between the anode and the cathode pass through; a distributor is arranged at the feeding end of the chain conveyor; the inlet of the hopper faces the discharge end of the chain conveyor, and the activated carbon regeneration device is arranged below the outlet of the hopper.
Recovering method:
1. The waste mercury catalyst (hereinafter referred to as the material) is sent to the feeding end of the chain conveyor by the screw feeder, and then transferred to the stainless steel material tank running here by the distributor, and the cover plate is closed:
2. The stainless steel material tanks filled with materials continue to run until the first (group) stainless steel material tanks all enter the electrolyte and reach the cathode copper plate, and then enter the electric reduction station. At this time, the chain conveyor stops running, and the cathode and anode are energized at the same time. At this time, the stainless steel material tank is used as the cathode of the electrolytic tank to electrically reduce the first (group) materials, and the mercury produced by the electrical reduction leaks to the bottom of the tank through the mesh at the bottom of the material tank;
3. After the electro-reduction, the chain conveyor continues to run, and the first (group) stainless steel material trough passes through the through hole of the partition plate to the ultrasonic oscillator station. The ultrasonic oscillator cleans and oscillates the mercury that has not leaked, and leaks to the trough bottom through the mesh at the trough bottom of the material trough; at the same time, the second (group) stainless steel material tank enters the electric reduction station for electric reduction, and it can deduce the rest from this.
4. The first (group) stainless steel material trough moves out of the ultrasonic oscillator station to the unloading end of the chain conveyor, and after unloading to the funnel, the empty material trough enters the return section of the chain conveyor and goes on and on; meanwhile, the second (group) stainless steel material tank repeats the passage of the first (group) stainless steel material tank;
5. The materials in the funnel enter the activated carbon regeneration device to produce regenerated activated carbon;
6. Open the mercury valve regularly to release the cleaned mercury from the electrolyzer.
Compared with the prior art, the invention has the positive effects that the technological process is clean, and almost no mercury vapor is generated in the whole production process; high degree of automation and high efficiency; at the same time, regenerated activated carbon is produced.
BRIEF DESCRIPTION OF THE FIGURES Figure 1 1s a schematic diagram of the present invention.
DESCRIPTION OF THE INVENTION The present invention will be further explained with reference to the figure.
It comprises a horizontal electrolyzer 16, an anode 4 and a cathode 5, wherein the anode 1s arranged in the electrolyte of the horizontal electrolyzer at the top while the cathode is arranged at the bottom; the cathode is a copper plate which is laid flat in the electrolyte, and each side end (other than the front end and the rear end) is fixed on the same side of the electrolyzer wall; an ultrasonic oscillator 13 is also arranged on the floor of the horizontal electrolyzer, which is located at the next station of the electric reduction station. A mercury discharge valve 15 is arranged on the floor of the electrolyzer; two parallel synchronous transmission chains form a chain conveyor 17, which runs in a closed loop around the upper and lower surfaces of the electrolyzer. The reversing wheels 3 of the chain conveyor are installed on the electrolyzer wall, so that the chain running on the electrolyzer can run horizontally in the channel formed between the anode and the cathode. Each chain is provided with at least two reversing wheels, which are respectively arranged at the inlet and outlet of the channel. All stainless steel material tanks 2 are hung on the chain conveyor in turn, specifically, the two edges corresponding to the rectangular notch of each stainless steel material tank are hung on the chain on the same side at the same time, that is, the stainless steel material tank is located between the two chains; a drawer-type cover plate is arranged on the material trough, and the floor of the material trough is grid-shaped; a partition plate 6 is arranged between the ultrasonic oscillator and the cathode, and the partition plate is provided with a through hole 7 through which a material tank can pass; the reversing wheel is installed at the height of the electrolyzer wall so that the bottom of the stainless steel material tank can fall on the copper plate, and the height of the stainless steel material tank can make the channel formed between the anode and the cathode pass through; the feeding end of the chain conveyor is provided with a distributor 1; the inlet of the hopper 8 faces the discharge end of the chain conveyor, and under the outlet of the hopper is an activated carbon regeneration device 12, 9 is a high-temperature steam pipe, and a belt conveyor is formed by a belt 10 and a speed reducer 11 to convey the regenerated activated carbon. 14 is a liquid outlet pipe.
The method for recovering mercury and activated carbon from waste mercury catalyst multi-components by using the device is as follows: (1) The waste mercury catalyst (hereinafter referred to as material) is sent to the feeding end of the chain conveyor by the screw feeder, and then transferred to the stainless steel material tank running here by the distributor, and the cover plate is closed:
(2) The stainless steel material tanks filled with materials continue to run until the first (group) stainless steel material tanks all enter the electrolyte, reach the cathode copper plate and enter the electric reduction station.
At this time, the chain conveyor stops running, and the cathode and anode are energized at the same time.
At this time, the stainless steel material tank 1s used as the cathode of the electrolytic tank to electrically reduce the first (group) materials, and the mercury produced by the electrical reduction leaks to the bottom of the tank through the mesh at the bottom of the material tank;
(3) After the electro-reduction, the chain conveyor continues to run, and the first (group) stainless steel material tank passes through the through hole of the partition plate to the ultrasonic oscillator station, and the ultrasonic oscillator cleans and oscillates the mercury that has not leaked out, and leaks to the bottom of the tank through the mesh at the bottom of the material tank; at the same time, the second (group) stainless steel material tank enters the electric reduction station for electric reduction, and so on;
(4) The first (group) stainless steel material trough moves out of the ultrasonic oscillator station to the unloading end of the chain conveyor, and after unloading to the hopper, the empty material trough enters the return section of the chain conveyor, and goes on and on; meanwhile, the second (group) stainless steel material tank repeats the passage of the first (group) stainless steel material tank;
(5) The materials in the funnel enter the activated carbon regeneration device to produce regenerated activated carbon; (6) Open the mercury valve regularly to release the cleaned mercury from the electrolyzer.
The electrolyte in step (2) consists of NaCl 20-40 g/L, HCI 65-85 g/L. and thiourea 1-2 g/L; the electrolysis time is 45-60 h, the electrolyte circulation flow is 10-15 L/min, and the cathode current density is 800-1200 A/m?; in the ultrasonic cleaning in step (3), the cleaning time is 5-20 min; in step (5), high temperature and high pressure steam is introduced into the activated carbon regeneration device at a flow rate of 0.5-1.0 m*/h.

Claims (3)

CLAIMS:
1. A device for recovering mercury and activated carbon from multi-components of waste mercury catalyst comprises a horizontal electrolyzer and an anode and a cathode thereof, which is characterized in that: the anode is arranged in the electrolyte of the horizontal electrolyzer at the top and the cathode is arranged at the bottom; the cathode is a copper plate which is laid flat in the electrolyte, and each side end (other than the front end and the rear end) of the cathode is fixed on the cell wall of the same side; an ultrasonic oscillator is also arranged on the floor of the horizontal electrolyzer, which is located at the next station of the electric reduction (cathode) station; a mercury discharge valve is arranged on the floor of the electrolyzer; two parallel synchronous transmission chains form a chain conveyor, and the chain conveyor runs in a closed loop around the upper and lower surfaces of the electrolytic tank; a reversing wheel of the chain conveyor is installed on the wall of the electrolyzer, so that the chain of the chain conveyor running on the electrolyzer can run horizontally in the channel formed between the anode and the cathode; each chain is provided with at least two reversing wheels which are respectively arranged at the entrance and exit of the channel; all stainless steel material tanks are hung on the chain conveyor in turn; specifically, the two edges corresponding to the rectangular notch of each stainless steel material tank are hung on the chain on the same side at the same time, that is, the stainless steel material tank is located between two chains; a drawer-type cover plate is arranged on the material trough, and the floor of the material trough is grid-shaped; a clapboard is arranged between the ultrasonic oscillator and the cathode, and the clapboard is provided with a through hole through which a material tank can pass; the reversing wheel 1s installed at the height of the electrolyzer wall so that the bottom of the stainless steel material tank can fall on the copper plate, and the height of the stainless steel material tank can make the channel formed between the anode and the cathode pass through; a distributor is arranged at the feeding end of the chain conveyor; the inlet of the hopper faces the discharge end of the chain conveyor, and the activated carbon regeneration device is arranged below the outlet of the hopper.
2. The device and a method for recovering mercury and activated carbon from multi-components of waste mercury catalyst according to claim 1 are characterized by comprising the following steps: (1) the material is sent to the feeding end of the chain conveyor by the screw feeder, and is transferred to the stainless steel material tank running here by the distributor, and the cover plate is closed; (2) the stainless steel material tank filled with materials continues to run until the first stainless steel material tank completely enters the electrolyte and reaches the cathode copper plate and enters the electric reduction station; at this time, the chain conveyor stops running, and the cathode and anode are energized at the same time; at this time, the stainless steel material tank is used as the cathode of the electrolytic tank to electrically reduce the first material, and the mercury produced by the electrical reduction leaks to the bottom of the tank through the mesh at the bottom of the material tank; (3) after the electro-reduction, the chain conveyor continues to run, and the first stainless steel material tank passes through the through hole of the partition plate to the ultrasonic oscillator station, and the ultrasonic oscillator cleans and oscillates the mercury that has not leaked, and leaks to the bottom of the tank through the mesh at the bottom of the material tank; at the same time, the second stainless steel material tank enters the electric reduction station for electric reduction, and it can deduce the rest from this; (4) the first stainless steel material trough moves out of the ultrasonic oscillator station to the unloading end of the chain conveyor, and after unloading to the hopper, the empty material trough enters the return section of the chain conveyor, and goes on and on; meanwhile, the second stainless steel material tank repeats the passage of the first stainless steel material tank; (5) the materials in the funnel enter the activated carbon regeneration device to produce regenerated activated carbon; (6) open the mercury valve regularly to release the cleaned mercury from the electrolyzer.
3. The method for recycling mercury and activated carbon according to claim 2 is characterized in that the electrolyte in step (2) consists of NaCl 20-40 g/L, HCI 65-85 g/L and thiourea 1-2 g/L; the electrolysis time is 45-60 h, the electrolyte circulation flow is 10-15 L/min, and the cathode current density is 800-1200 A/m?; in the ultrasonic cleaning in step (3), the cleaning time is 5-20 min; in step (5), high temperature and high pressure steam is introduced into the activated carbon regeneration device at a flow rate of 0.5-1.0 m°/h.
LU500524A 2021-08-10 2021-08-10 Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component LU500524B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LU500524A LU500524B1 (en) 2021-08-10 2021-08-10 Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU500524A LU500524B1 (en) 2021-08-10 2021-08-10 Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component

Publications (1)

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LU500524B1 true LU500524B1 (en) 2022-02-10

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LU500524A LU500524B1 (en) 2021-08-10 2021-08-10 Device and Recovery Method for Environmental-friendly Recovering Mercury and Activated Carbon from Waste Mercury Catalyst Multi-component

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Effective date: 20220210