CN212017835U - Regeneration device for waste mercury adsorption material - Google Patents
Regeneration device for waste mercury adsorption material Download PDFInfo
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- CN212017835U CN212017835U CN202020329410.1U CN202020329410U CN212017835U CN 212017835 U CN212017835 U CN 212017835U CN 202020329410 U CN202020329410 U CN 202020329410U CN 212017835 U CN212017835 U CN 212017835U
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Abstract
The utility model discloses a regeneration device of waste mercury adsorption materials, which comprises a chain groove furnace, a mercury condenser and a tail gas tower; the interior of the furnace body of the chain-link furnace is divided into a material exchange area and a heating area, the upper part of the furnace body at one side of the material exchange area is provided with a feeding bin, and the lower part of the furnace body is provided with a discharging bin; a heater and a thermocouple are arranged on one side of the heating area; the furnace body is provided with a gas-guiding pipe communicated with the upper part of the mercury condenser and a gas-inlet pipe communicated with the lower part of the mercury condenser; the furnace body is internally provided with a chain wheel and a chain, the chain is provided with a plurality of material troughs, and the upper part of the material outlet bin is provided with a V-shaped slideway. The utility model discloses the fixed bed furnace charge layer thickness is big, heat transfer efficiency is poor, the uneven problem of demercuration effect has been solved to the structure to can realize continuous production, improve the heat utilization efficiency, reduce the energy consumption.
Description
Technical Field
The utility model belongs to the technical field of the pump is retrieved, the utensil relates to an abandonment mercury adsorption material regenerating unit, can be applied to mercury renewable resources and retrieve and contain the analytic of mercury adsorption material.
Background
Along with the achievement of the "water guarantee", the emission limit of mercury in the emission standard of wastewater and waste gas is more strict, the traditional mercury removal method or the cooperative mercury removal method are adopted in many mercury-related industries, the emission standard is difficult to achieve, and special mercury removal adsorbents are gradually selected for deep removal, so that a large amount of mercury-containing dangerous waste is generated, and the difficulty of comprehensively utilizing the mercury-containing dangerous waste is faced.
At present, the treatment of the mercury-containing waste is mainly to recover mercury from high-content waste such as waste mercury catalyst and the like, and a fixed bed is generally adopted for evaporation-condensation to recover elemental mercury or mercuric chloride. For recovering mercury from waste mercury adsorbents and the like in the natural gas industry, a fixed bed is generally adopted for evaporation-condensation to recover elemental mercury. The treatment and disposal of the waste mercury-containing chemical reagent mainly adopts a wet treatment technology, and the mercury-containing chemical reagent is recovered by adopting purification methods such as filtration, distillation and the like according to the properties of different waste mercury-containing chemical reagents. Very few are landfills or curing processes.
For the waste mercury catalyst treatment technology, the waste mercury catalyst is used as a raw material, and regenerated mercury is recovered by pyrometallurgy; the waste mercury catalyst is used as a raw material, and the 'regenerated mercury catalyst' is produced by chemical activation and recovery; recovery of waste catalyst HgCl by oxygen-controlling dry distillation method2And an activated carbon process. Oxygen-controlled dry distillation method, namely, high-efficiency recovery of HgCl2The technology is listed as a recommended technology for clean production of polyvinyl chloride by a calcium carbide method.
At present, the commonly adopted waste mercury catalyst recovery processing method of enterprises is to recover metal mercury by a distillation method, and the enterprises also adopt oxygen control dry distillation and chemical activation methods to produce new mercury catalysts. The former uses deactivated waste mercury catalyst as raw material, while the latter needs to use mercuric chloride as raw material. The final product of the waste mercury catalyst recovery enterprise is liquid mercury or mercuric chloride catalyst.
The distillation method recovery processing technology is similar to the mercury smelting technology, and only has more pretreatment links of the waste mercury catalyst than the mercury smelting technology, namely chemical impregnation. The chemical impregnation is to separate mercury chloride from mercury catalyst by a chemical method, and then obtain metallic mercury through the working procedures of roasting, condensing and the like.
Recovery of waste catalyst HgCl by oxygen-controlling dry distillation method2And the activated carbon process, namely the high-efficiency mercury recovery technology, utilizes HgCl2Sublimating at high temperature andthe principle that the sublimation temperature is lower than the coking temperature of the active carbon realizes HgCl through dry distillation in the environment of negative pressure sealing and inert gas atmosphere2And the activated carbon is recovered at the same time. The process not only can realize the comprehensive utilization of resources of the mercuric chloride and the activated carbon, but also can effectively avoid the mercury loss in the recovery process, so that the recovery rate of the mercuric chloride reaches 99 percent. The method is suitable for treating the waste mercury catalyst in the PVC production by the calcium carbide method, adopts closed circulation recovery, and does not cause pollution to the environment in operation.
The chemical activation method is characterized in that on the premise of not separating the activated carbon and the mercuric chloride in the waste mercury catalyst, the activated carbon is reactivated by using a chemical method, carbon deposit and catalyst poisoning are eliminated, and then a proper amount of auxiliary agents and active substance mercuric chloride are added according to the content requirement of the mercuric chloride in the mercuric chloride catalyst product to realize regeneration. The process comprises the following steps: mechanical impurities (such as scrap iron, screws, stones, wood blocks and the like) and fine waste mercury catalysts in the waste mercury catalysts are removed through manual selection (or mechanical selection) and screening, then the waste mercury catalysts are placed in an activator for chemical activation, and then the mercury catalysts are produced according to a normal mercury catalyst production process.
At present, the mercury removal adsorbent commonly used at home and abroad in the natural gas industry mainly comprises sulfur-loaded/silver-loaded activated carbon, supported metal sulfide, metal oxide, silver-loaded molecular sieve and the like. The silver-carrying molecular sieve and the silver-carrying activated carbon belong to renewable mercury removal agents, and the rest belong to non-renewable mercury removal agents. Therefore, gas-phase demercuration process methods are classified into non-renewable demercuration processes and renewable demercuration processes. Either demercuration process ultimately results in the production of a waste mercury-containing sorbent. China adopts distillation technology to treat mercury-containing mercury removal agents conventionally, and adopts a landfill treatment mode abroad.
The treatment and disposal of the waste mercury-containing chemical reagent mainly adopts a wet treatment technology, and the mercury-containing chemical reagent is recovered by adopting purification methods such as filtration, distillation and the like according to the properties of different waste mercury-containing chemical reagents.
The wet method for recycling and disposing the waste mercury-containing chemical reagent has low disposal cost, small secondary pollution generated in the disposal process and high resource regeneration utilization rate.
The method is suitable for treatment and disposal of waste mercury-containing chemical reagents such as waste elemental mercury, waste mercury salt chemicals and the like.
The wet treatment technology of the waste mercury-containing chemical reagent is different in treatment process according to different properties of the contained chemical reagent, and the waste elemental mercury treatment comprises units such as acid washing, alkali washing, rinsing, drying and filtering and the like; the chemical treatment of the waste mercury salt easy to sublimate comprises the step of directly carrying out sublimation or distillation to remove impurities so as to obtain a qualified product; the treatment of mercury salt compound which is easy to dissolve in acid and water includes the technological units of adding acid to dissolve, adding alkali to precipitate and stoving.
The technology is a comprehensive stabilization treatment process taking cement curing as a main part and taking a medicament as an auxiliary part. Mixing chemical reagent, stabilizing agent (organic sulfide) and cement or incineration residue in proportion, stirring in a mixing and stirring tank, forming building blocks, and safely burying
The solid formed after curing treatment should have good leaching resistance, impermeability, moisture resistance and freeze-thaw resistance, and also have strong mechanical strength.
Patent CN 104451204A discloses a mercury recovery dry distillation device of waste mercury catalyst, adopts shell and tube cloth and heating mode, and zone heating in jar improves the rate of recovery of mercury, but has the inconvenient operation, and the heating fault rate is high, the difficult scheduling problem of maintenance.
Patent CN207512245U discloses a mercury device is retrieved to useless mercury catalyst, utilizes direct heating useless mercury catalyst and gas, and the dual heating mode of recycling gas heating catalyst ensures the homogeneity of catalyst heating, in time discharges the mercury-containing vapour through gas circulation, though can improve the material demercuration efficiency, but only can be interrupted the operation.
The fixed bed furnace body is utilized to treat the mercury-containing materials, the problems of large material layer thickness, poor heat transfer effect, incapability of continuous operation and the like generally exist, so that the equipment has small treatment capacity, high operation labor intensity and inconvenience in improving the production capacity.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the utility model provides a waste mercury adsorption material regenerating unit to solve the unable continuous production problem that prior art exists.
The utility model discloses a realize through following technical scheme: the utility model provides a waste mercury adsorption material regenerating unit which characterized in that: comprises a chain groove furnace, a mercury condenser and a tail gas tower;
the chain trough furnace comprises a furnace body, the interior of the furnace body is divided into a material exchange area and a heating area, the upper part of the furnace body on one side of the material exchange area is provided with a feeding bin, and the lower part of the furnace body is provided with a discharging bin; a heater and a thermocouple are arranged on one side of the heating area;
the furnace body is provided with a gas-guiding pipe communicated with the upper part of the mercury condenser and a gas inlet pipe communicated with the lower part of the mercury condenser, and the gas inlet pipe is also provided with a draught fan; the tail gas tower is communicated with the mercury condenser through an air inlet pipe, and valves are respectively arranged at the positions, close to the furnace body, where the tail gas tower is communicated with the air inlet pipe and at one side of the tail gas tower;
the furnace body is internally provided with a chain wheel and a chain, the chain is provided with a plurality of material troughs, the material troughs are matched with the chain through a rotating shaft, and the end parts of the material troughs are also provided with trough sliding shafts; the upper part of the discharging bin is provided with a V-shaped slide way, and the upper edge of the V-shaped slide way is higher than the groove sliding shaft and lower than the rotating shaft.
Further: and a chain wheel shaft of the chain wheel is matched with the furnace body through a bearing, and one end of the chain wheel extends out of the furnace body and is matched with the motor.
Further: the trough section is semicircular or takes the circle diameter as the inscribed polygon of topside to bilateral symmetry, the trough focus is located on the round mandrel, can rotate for the chain intention.
Further: the length of a heating area of the furnace chamber is 20% -50% of the total length of the furnace chamber, and the heater is positioned inside or outside the furnace chamber of the furnace body.
Further: the air inlet pipe enters the furnace body from one side of the material exchange area, extends to the heating area in the furnace body, and is opened in the heating area.
The utility model discloses the beneficial effect of structure is: the problems of large thickness of the fixed bed furnace burden layer, poor heat transfer efficiency and uneven demercuration effect are solved, the demercuration efficiency is improved by adjusting the thickness, the temperature and the retention time of the material layer, continuous production can be realized, all material grooves are sealed in the furnace chamber to move circularly, heat exchange between the cold material entering the furnace and the hot material leaving the furnace is facilitated, the heat utilization rate is improved, and the energy consumption is reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a partial sectional view of the structural chain-grooved furnace A-A of the present invention;
fig. 3 is a schematic diagram of the overturning action of the trough of the present invention.
The sequence numbers in the figures illustrate:
1 is the one-level feeding storehouse, 2 is the second grade feeding storehouse, 3 is a feed valve, 4 is the secondary feed valve, 5 is the groove sliding shaft, 6 is the silo, 7 is the furnace body, 8 is the chain, 9 is the bleed pipe, 10 is the sprocket, 11 is the intake pipe, 12 is the mercury condensing ware, 13 is the valve, 14 is the blast pipe, 15 is the tail gas tower, 16 is the draught fan, 17 is the heater, 18 is the thermocouple, 19 is the one-level ejection of compact storehouse, 20 is a bleeder valve, 21 is the second grade ejection of compact storehouse, 22 is the V-arrangement slide, 23 is the chain groove stove, 24 is the secondary ejection of compact valve, 25 is the rotation axis.
Detailed Description
As shown in fig. 1-3, the device for regenerating a waste mercury adsorbing material of the present invention comprises a chain groove furnace 23, a mercury condenser 12 and a tail gas tower 15;
the chain-link trough furnace comprises a furnace body 7, wherein a material exchange area and a heating area are respectively arranged at the left side and the right side in the furnace body, a feeding bin is arranged at the upper part of the furnace body at one side of the material exchange area, and a discharging bin is arranged at the lower part of the furnace body; a heater 17 and a thermocouple 18 are arranged on one side of the heating zone; the feeding bin is arranged in a secondary sealing mode and comprises a primary feeding bin 1 and a secondary feeding bin 2 which are sequentially communicated from top to bottom, a primary feeding valve 3 and a secondary feeding valve 4 are respectively arranged on the lower side of the feeding bin, the discharging bin is also arranged in a secondary sealing mode and comprises a primary discharging bin 19 and a secondary discharging bin 21 which are sequentially communicated from top to bottom, and a primary discharging valve 20 and a secondary discharging valve 24 are respectively arranged on the lower side of the discharging bin; the feeding bin and the discharging bin are arranged in two stages, so that the sealing performance of the furnace body can be still ensured during feeding and discharging, harmful gas is prevented from overflowing, and the environmental protection performance is improved. The furnace body is provided with an air-entraining pipe 9 communicated with the upper part of the mercury condenser and an air inlet pipe 11 communicated with the lower part of the mercury condenser, the air inlet pipe is also provided with an induced draft fan 16, the induced draft fan drives the gas in the furnace body to circulate, mercury is removed in the mercury condenser, and the removed mercury is discharged and recovered from the lower part of the mercury condenser; the opening of the air guide pipe 9 in the furnace body is positioned in the heating area, the air inlet pipe 11 enters the furnace body from one side of the material exchange area, extends to the heating area in the furnace body, and is opened in the heating area. The tail gas tower is communicated with the gas inlet pipe through an exhaust pipe 14 and further communicated with the mercury condenser, and valves 13 for controlling gas passages are respectively arranged at the positions, close to the furnace body, where the tail gas tower (the exhaust pipe) is communicated with the gas inlet pipe and at one side of the tail gas tower; as shown in the figure, the two valves are respectively positioned at the communication position far away from one side of the mercury condenser, the fan is positioned at the communication position close to one side of the mercury condenser, and the gas in the mercury condenser can be effectively controlled to enter the furnace body or enter the tail gas tower through one-on-one-off or one-off-one-on of the two valves.
The furnace body is also internally provided with a chain wheel 10 and two groups of annular reciprocating chains 8, a plurality of material troughs 6 are arranged between the chains, the material troughs are matched with the chains through rotating shafts 25, and the rotating shafts can be welded and fixed on chain links of the chains or are coaxially arranged with connecting shafts of the chains; a groove sliding shaft 5 is also arranged at the end part of the material groove; the furnace body is provided with a V-shaped slide way 22 at the upper part of the discharging bin, and the upper edge of the V-shaped slide way is higher than the groove sliding shaft and lower than the rotating shaft.
Preferably: and a chain wheel shaft of the chain wheel is matched with the furnace body through a bearing, and one end of the chain wheel extends out of the furnace body and is matched with the motor.
Preferably: the trough section is semicircular or takes the circle diameter as the inscribed polygon of topside to bilateral symmetry, the trough focus is located on the round mandrel, can rotate for the chain intention.
Preferably: the length of a heating area of the furnace chamber is 20% -50% of the total length of the furnace chamber, and the heater is positioned inside or outside the furnace chamber of the furnace body. The material in the material groove is heated and volatilized in the heating area.
Preferably: the heater is an electric heating pipe, penetrates through the furnace body and is arranged in the heating area or is directly arranged below the outer side of the furnace body, and is further preferably arranged between the two chains and does not interfere with the material tank.
Preferably: the heater is a gas heater and is arranged below the outer side of the furnace body.
Preferably: as shown in fig. 3, the V-shaped chute is in an inverted-V shape, and as the trough moves, the sliding shaft of the trough interferes with one side edge of the V-shaped chute, and under the action of the interference, the trough is turned over, so that the materials in the trough are unloaded and finally discharged from the discharge hole.
The utility model discloses the working process of structure as follows: the waste mercury adsorbent is added into a trough through two closed secondary feeding bins and a primary feeding bin which are connected in series, the trough is arranged in a closed furnace chamber, shafts at two ends of the trough are fixed on a chain, the chain is placed on a supporting frame and is connected with a motor reducer through a chain wheel for driving, and the trough continuously and circularly moves in the furnace chamber; the furnace chamber is a heating zone far away from the feeding end, the temperature is controlled by a thermocouple, the waste mercury adsorbent moving to the trough at the position is heated and demercurated, the trough after demercuration moves out of the heating zone to exchange heat with new feeding in the moving process of the feeding and discharging zone, the trough at the discharging bin is overturned to discharge, and the waste mercury adsorbent is discharged through a first-stage discharging bin and a second-stage discharging bin which are connected in series, namely the regenerated adsorbent; the mercury in the waste mercury adsorbent is gasified in a heating zone, enters a mercury condenser along with the circulating gas and is condensed into liquid mercury for recycling, and the gas returns to the circulation through a draught fan; and when the furnace is shut down, the gas is exhausted through a tail gas tower.
The utility model discloses in the structure, the connection of each part can be through modes such as welding, spiro union, bearing connection.
The utility model discloses simple structure, low in cost, the thermal efficiency is high, and continuous operation easily controls, can handle various materials and satisfy different usage demands.
Claims (5)
1. The utility model provides a waste mercury adsorption material regenerating unit which characterized in that: comprises a chain groove furnace, a mercury condenser and a tail gas tower;
the chain trough furnace comprises a furnace body, the interior of the furnace body is divided into a material exchange area and a heating area, the upper part of the furnace body on one side of the material exchange area is provided with a feeding bin, and the lower part of the furnace body is provided with a discharging bin; a heater and a thermocouple are arranged on one side of the heating area;
the furnace body is provided with a gas-guiding pipe communicated with the upper part of the mercury condenser and a gas inlet pipe communicated with the lower part of the mercury condenser, and the gas inlet pipe is also provided with a draught fan; the tail gas tower is communicated with the mercury condenser through an air inlet pipe, and valves are respectively arranged at the positions, close to the furnace body, where the tail gas tower is communicated with the air inlet pipe and at one side of the tail gas tower;
the furnace body is internally provided with a chain wheel and a chain, the chain is provided with a plurality of material troughs, the material troughs are matched with the chain through a rotating shaft, and the end parts of the material troughs are also provided with trough sliding shafts; the upper part of the discharging bin is provided with a V-shaped slide way, and the upper edge of the V-shaped slide way is higher than the groove sliding shaft and lower than the rotating shaft.
2. The apparatus for regenerating a waste mercury adsorbing material according to claim 1, wherein: and a chain wheel shaft of the chain wheel is matched with the furnace body through a bearing, and one end of the chain wheel extends out of the furnace body and is matched with the motor.
3. The apparatus for regenerating a waste mercury adsorbing material according to claim 1, wherein: the trough section is semicircular or takes the circle diameter as the inscribed polygon of topside to bilateral symmetry, the trough focus is located on the round mandrel, can rotate for the chain intention.
4. The apparatus for regenerating a waste mercury adsorbing material according to claim 1, wherein: the length of a heating area of the furnace chamber is 20% -50% of the total length of the furnace chamber, and the heater is positioned inside or outside the furnace chamber of the furnace body.
5. The apparatus for regenerating a waste mercury adsorbing material according to claim 1, wherein: the air inlet pipe enters the furnace body from one side of the material exchange area, extends to the heating area in the furnace body, and is opened in the heating area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020329410.1U CN212017835U (en) | 2020-03-17 | 2020-03-17 | Regeneration device for waste mercury adsorption material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020329410.1U CN212017835U (en) | 2020-03-17 | 2020-03-17 | Regeneration device for waste mercury adsorption material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250070A (en) * | 2020-03-17 | 2020-06-09 | 沈阳鑫迪环境技术有限公司 | Regeneration device and recovery method for waste mercury adsorption material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250070A (en) * | 2020-03-17 | 2020-06-09 | 沈阳鑫迪环境技术有限公司 | Regeneration device and recovery method for waste mercury adsorption material |
| CN111250070B (en) * | 2020-03-17 | 2024-02-06 | 沈阳鑫迪环境技术有限公司 | Regeneration device and recovery method for waste mercury adsorption material |
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